파일 및 썸네일 다운로드 Endpoint의 핸들러를 하나로 통합

Chunked Upload 도입

.dockerignore

@@ -1,5 +1,6 @@
 .git
 node_modules
+/Makefile
 
 # Output
 .output
@@ -10,13 +11,16 @@ node_modules
 /build
 /data
 /library
+/thumbnails
+/uploads
 
 # OS
 .DS_Store
 Thumbs.db
 
-# VSCode
+# Editors
 /.vscode
+/.idea
 
 # Env
 .env

.env.example

@@ -11,3 +11,5 @@ SESSION_EXPIRES=
 USER_CLIENT_CHALLENGE_EXPIRES=
 SESSION_UPGRADE_CHALLENGE_EXPIRES=
 LIBRARY_PATH=
+THUMBNAILS_PATH=
+UPLOADS_PATH=

.gitignore

@@ -9,13 +9,16 @@ node_modules
 /build
 /data
 /library
+/thumbnails
+/uploads
 
 # OS
 .DS_Store
 Thumbs.db
 
-# VSCode
+# Editors
 /.vscode
+/.idea
 
 # Env
 .env

Dockerfile

@@ -2,11 +2,7 @@
 FROM node:22-alpine AS base
 WORKDIR /app
 
-RUN apk add --no-cache bash curl && \
+RUN npm install -g pnpm@10
-    curl -o /usr/local/bin/wait-for-it https://raw.githubusercontent.com/vishnubob/wait-for-it/master/wait-for-it.sh && \
-    chmod +x /usr/local/bin/wait-for-it
-
-RUN npm install -g pnpm@9
 COPY pnpm-lock.yaml .
 
 # Build Stage
@@ -29,4 +25,4 @@ COPY --from=build /app/build ./build
 
 EXPOSE 3000
 ENV BODY_SIZE_LIMIT=Infinity
-CMD ["bash", "-c", "wait-for-it ${DATABASE_HOST:-localhost}:${DATABASE_PORT:-5432} -- node ./build/index.js"]
+CMD ["node", "./build/index.js"]

docker-compose.dev.yaml

@@ -1,7 +1,7 @@
 services:
   database:
-    image: postgres:17.2
+    image: postgres:17
-    restart: on-failure
+    restart: always
     volumes:
       - database:/var/lib/postgresql/data
     environment:

docker-compose.yaml

@@ -1,12 +1,14 @@
 services:
   server:
     build: .
-    restart: on-failure
+    restart: unless-stopped
     depends_on:
-      - database
+      database:
+        condition: service_healthy
     user: ${CONTAINER_UID:-0}:${CONTAINER_GID:-0}
     volumes:
       - ./data/library:/app/data/library
+      - ./data/thumbnails:/app/data/thumbnails
     environment:
       # ArkVault
       - DATABASE_HOST=database
@@ -17,6 +19,8 @@ services:
       - USER_CLIENT_CHALLENGE_EXPIRES
       - SESSION_UPGRADE_CHALLENGE_EXPIRES
       - LIBRARY_PATH=/app/data/library
+      - THUMBNAILS_PATH=/app/data/thumbnails
+      - UPLOADS_PATH=/app/data/uploads
       # SvelteKit
       - ADDRESS_HEADER=${TRUST_PROXY:+X-Forwarded-For}
       - XFF_DEPTH=${TRUST_PROXY:-}
@@ -25,11 +29,16 @@ services:
       - ${PORT:-80}:3000
 
   database:
-    image: postgres:17.2-alpine
+    image: postgres:17-alpine
-    restart: on-failure
+    restart: unless-stopped
     user: ${CONTAINER_UID:-0}:${CONTAINER_GID:-0}
     volumes:
       - ./data/database:/var/lib/postgresql/data
     environment:
       - POSTGRES_USER=arkvault
       - POSTGRES_PASSWORD=${DATABASE_PASSWORD:?}
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U $${POSTGRES_USER}"]
+      interval: 5s
+      timeout: 5s
+      retries: 5

eslint.config.js

@@ -1,21 +1,24 @@
-import prettier from "eslint-config-prettier";
-import js from "@eslint/js";
 import { includeIgnoreFile } from "@eslint/compat";
+import js from "@eslint/js";
+import { defineConfig } from "eslint/config";
+import prettier from "eslint-config-prettier";
 import svelte from "eslint-plugin-svelte";
 import tailwind from "eslint-plugin-tailwindcss";
 import globals from "globals";
-import { fileURLToPath } from "node:url";
 import ts from "typescript-eslint";
+import { fileURLToPath } from "url";
+import svelteConfig from "./svelte.config.js";
+
 const gitignorePath = fileURLToPath(new URL("./.gitignore", import.meta.url));
 
-export default ts.config(
+export default defineConfig(
   includeIgnoreFile(gitignorePath),
   js.configs.recommended,
   ...ts.configs.recommended,
-  ...svelte.configs["flat/recommended"],
+  ...svelte.configs.recommended,
   ...tailwind.configs["flat/recommended"],
   prettier,
-  ...svelte.configs["flat/prettier"],
+  ...svelte.configs.prettier,
   {
     languageOptions: {
       globals: {
@@ -23,13 +26,18 @@ export default ts.config(
         ...globals.node,
       },
     },
+    rules: {
+      "no-undef": "off",
+    },
   },
   {
-    files: ["**/*.svelte"],
+    files: ["**/*.svelte", "**/*.svelte.ts", "**/*.svelte.js"],
-
     languageOptions: {
       parserOptions: {
+        projectService: true,
+        extraFileExtensions: [".svelte"],
         parser: ts.parser,
+        svelteConfig,
       },
     },
   },

package.json

@@ -1,7 +1,7 @@
 {
   "name": "arkvault",
   "private": true,
-  "version": "0.4.0",
+  "version": "0.8.0",
   "type": "module",
   "scripts": {
     "dev": "vite dev",
@@ -16,52 +16,58 @@
     "db:migrate": "kysely migrate"
   },
   "devDependencies": {
-    "@eslint/compat": "^1.2.4",
+    "@eslint/compat": "^2.0.1",
-    "@iconify-json/material-symbols": "^1.2.12",
+    "@eslint/js": "^9.39.2",
-    "@sveltejs/adapter-node": "^5.2.11",
+    "@iconify-json/material-symbols": "^1.2.51",
-    "@sveltejs/kit": "^2.15.2",
+    "@noble/hashes": "^2.0.1",
-    "@sveltejs/vite-plugin-svelte": "^4.0.4",
+    "@sveltejs/adapter-node": "^5.4.0",
+    "@sveltejs/kit": "^2.49.4",
+    "@sveltejs/vite-plugin-svelte": "^6.2.4",
+    "@tanstack/svelte-virtual": "^3.13.18",
+    "@trpc/client": "^11.8.1",
     "@types/file-saver": "^2.0.7",
     "@types/ms": "^0.7.34",
-    "@types/node-schedule": "^2.1.7",
+    "@types/node-schedule": "^2.1.8",
-    "@types/pg": "^8.11.10",
+    "@types/pg": "^8.16.0",
-    "autoprefixer": "^10.4.20",
+    "autoprefixer": "^10.4.23",
-    "axios": "^1.7.9",
+    "axios": "^1.13.2",
-    "dexie": "^4.0.10",
+    "dexie": "^4.2.1",
-    "eslint": "^9.17.0",
+    "eslint": "^9.39.2",
-    "eslint-config-prettier": "^9.1.0",
+    "eslint-config-prettier": "^10.1.8",
-    "eslint-plugin-svelte": "^2.46.1",
+    "eslint-plugin-svelte": "^3.14.0",
-    "eslint-plugin-tailwindcss": "^3.17.5",
+    "eslint-plugin-tailwindcss": "^3.18.2",
-    "exifreader": "^4.26.0",
+    "exifreader": "^4.35.0",
     "file-saver": "^2.0.5",
-    "globals": "^15.14.0",
+    "globals": "^17.0.0",
     "heic2any": "^0.0.4",
-    "kysely-ctl": "^0.10.1",
+    "kysely-ctl": "^0.19.0",
-    "mime": "^4.0.6",
+    "lru-cache": "^11.2.4",
-    "p-limit": "^6.2.0",
+    "mime": "^4.1.0",
-    "prettier": "^3.4.2",
+    "p-limit": "^7.2.0",
-    "prettier-plugin-svelte": "^3.3.2",
+    "prettier": "^3.7.4",
-    "prettier-plugin-tailwindcss": "^0.6.9",
+    "prettier-plugin-svelte": "^3.4.1",
-    "svelte": "^5.19.1",
+    "prettier-plugin-tailwindcss": "^0.7.2",
-    "svelte-check": "^4.1.3",
+    "svelte": "^5.46.1",
-    "tailwindcss": "^3.4.17",
+    "svelte-check": "^4.3.5",
-    "typescript": "^5.7.3",
+    "tailwindcss": "^3.4.19",
-    "typescript-eslint": "^8.19.1",
+    "typescript": "^5.9.3",
-    "unplugin-icons": "^0.22.0",
+    "typescript-eslint": "^8.52.0",
-    "vite": "^5.4.11"
+    "unplugin-icons": "^22.5.0",
+    "vite": "^7.3.1"
   },
   "dependencies": {
-    "@fastify/busboy": "^3.1.1",
+    "@trpc/server": "^11.8.1",
-    "argon2": "^0.41.1",
+    "argon2": "^0.44.0",
-    "kysely": "^0.27.5",
+    "kysely": "^0.28.9",
     "ms": "^2.1.3",
     "node-schedule": "^2.1.1",
-    "pg": "^8.13.1",
+    "pg": "^8.16.3",
-    "uuid": "^11.0.4",
+    "superjson": "^2.2.6",
-    "zod": "^3.24.1"
+    "uuid": "^13.0.0",
+    "zod": "^4.3.5"
   },
   "engines": {
     "node": "^22.0.0",
-    "pnpm": "^9.0.0"
+    "pnpm": "^10.0.0"
   }
 }

src/hooks.client.ts

@@ -1,9 +1,17 @@
 import type { ClientInit } from "@sveltejs/kit";
 import { cleanupDanglingInfos, getClientKey, getMasterKeys, getHmacSecrets } from "$lib/indexedDB";
 import { prepareFileCache } from "$lib/modules/file";
-import { prepareOpfs } from "$lib/modules/opfs";
 import { clientKeyStore, masterKeyStore, hmacSecretStore } from "$lib/stores";
 
+const requestPersistentStorage = async () => {
+  const isPersistent = await navigator.storage.persist();
+  if (isPersistent) {
+    console.log("[ArkVault] Persistent storage granted.");
+  } else {
+    console.warn("[ArkVault] Persistent storage not granted.");
+  }
+};
+
 const prepareClientKeyStore = async () => {
   const [encryptKey, decryptKey, signKey, verifyKey] = await Promise.all([
     getClientKey("encrypt"),
@@ -32,11 +40,11 @@ const prepareHmacSecretStore = async () => {
 
 export const init: ClientInit = async () => {
   await Promise.all([
+    requestPersistentStorage(),
     prepareFileCache(),
     prepareClientKeyStore(),
     prepareMasterKeyStore(),
     prepareHmacSecretStore(),
-    prepareOpfs(),
   ]);
 
   cleanupDanglingInfos(); // Intended

src/hooks.server.ts

@@ -7,6 +7,7 @@ import {
   cleanupExpiredSessions,
   cleanupExpiredSessionUpgradeChallenges,
 } from "$lib/server/db/session";
+import { cleanupExpiredUploadSessions } from "$lib/server/services/upload";
 import { authenticate, setAgentInfo } from "$lib/server/middlewares";
 
 export const init: ServerInit = async () => {
@@ -16,6 +17,7 @@ export const init: ServerInit = async () => {
     cleanupExpiredUserClientChallenges();
     cleanupExpiredSessions();
     cleanupExpiredSessionUpgradeChallenges();
+    cleanupExpiredUploadSessions();
   });
 };
 

src/lib/components/atoms/RowVirtualizer.svelte

@@ -0,0 +1,60 @@
+<script lang="ts">
+  import { createWindowVirtualizer } from "@tanstack/svelte-virtual";
+  import type { Snippet } from "svelte";
+  import type { ClassValue } from "svelte/elements";
+
+  interface Props {
+    class?: ClassValue;
+    count: number;
+    item: Snippet<[index: number]>;
+    itemHeight: (index: number) => number;
+    itemGap?: number;
+    placeholder?: Snippet;
+  }
+
+  let { class: className, count, item, itemHeight, itemGap, placeholder }: Props = $props();
+
+  let element: HTMLElement | undefined = $state();
+  let scrollMargin = $state(0);
+
+  let virtualizer = $derived(
+    createWindowVirtualizer({
+      count,
+      estimateSize: itemHeight,
+      gap: itemGap,
+      scrollMargin,
+    }),
+  );
+
+  const measureItem = (node: HTMLElement) => {
+    $effect(() => $virtualizer.measureElement(node));
+  };
+
+  $effect(() => {
+    if (!element) return;
+
+    const observer = new ResizeObserver(() => {
+      scrollMargin = Math.round(element!.getBoundingClientRect().top + window.scrollY);
+    });
+    observer.observe(element.parentElement!);
+    return () => observer.disconnect();
+  });
+</script>
+
+<div bind:this={element} class={["relative", className]}>
+  <div style:height="{$virtualizer.getTotalSize()}px">
+    {#each $virtualizer.getVirtualItems() as virtualItem (virtualItem.key)}
+      <div
+        class="absolute left-0 top-0 w-full"
+        style:transform="translateY({virtualItem.start - scrollMargin}px)"
+        data-index={virtualItem.index}
+        use:measureItem
+      >
+        {@render item(virtualItem.index)}
+      </div>
+    {/each}
+  </div>
+  {#if placeholder && count === 0}
+    {@render placeholder()}
+  {/if}
+</div>

src/lib/components/atoms/buttons/FileThumbnailButton.svelte

@@ -0,0 +1,24 @@
+<script lang="ts">
+  import { getFileThumbnail } from "$lib/modules/file";
+  import type { SummarizedFileInfo } from "$lib/modules/filesystem";
+
+  interface Props {
+    info: SummarizedFileInfo;
+    onclick?: (file: SummarizedFileInfo) => void;
+  }
+
+  let { info, onclick }: Props = $props();
+
+  let thumbnail = $derived(getFileThumbnail(info));
+</script>
+
+<button
+  onclick={onclick && (() => setTimeout(() => onclick(info), 100))}
+  class="aspect-square overflow-hidden rounded transition active:scale-95 active:brightness-90"
+>
+  {#if $thumbnail}
+    <img src={$thumbnail} alt={info.name} class="h-full w-full object-cover" />
+  {:else}
+    <div class="h-full w-full bg-gray-100"></div>
+  {/if}
+</button>

src/lib/components/atoms/buttons/index.ts

@@ -1,5 +1,6 @@
 export { default as ActionEntryButton } from "./ActionEntryButton.svelte";
 export { default as Button } from "./Button.svelte";
 export { default as EntryButton } from "./EntryButton.svelte";
+export { default as FileThumbnailButton } from "./FileThumbnailButton.svelte";
 export { default as FloatingButton } from "./FloatingButton.svelte";
 export { default as TextButton } from "./TextButton.svelte";

src/lib/components/atoms/divs/FullscreenDiv.svelte

@@ -1,7 +1,15 @@
 <script lang="ts">
-  let { children } = $props();
+  import type { Snippet } from "svelte";
+  import type { ClassValue } from "svelte/elements";
+
+  interface Props {
+    children: Snippet;
+    class?: ClassValue;
+  }
+
+  let { children, class: className }: Props = $props();
 </script>
 
-<div class="flex flex-grow flex-col justify-between px-4">
+<div class={["flex flex-grow flex-col justify-between px-4", className]}>
   {@render children()}
 </div>

src/lib/components/atoms/index.ts

@@ -3,3 +3,4 @@ export * from "./buttons";
 export * from "./divs";
 export * from "./inputs";
 export { default as Modal } from "./Modal.svelte";
+export { default as RowVirtualizer } from "./RowVirtualizer.svelte";

src/lib/components/molecules/ActionModal.svelte

@@ -12,6 +12,7 @@
     confirmText: string;
     isOpen: boolean;
     onbeforeclose?: () => void;
+    oncancel?: () => void;
     onConfirmClick: ConfirmHandler;
     title: string;
   }
@@ -22,6 +23,7 @@
     confirmText,
     isOpen = $bindable(),
     onbeforeclose,
+    oncancel,
     onConfirmClick,
     title,
   }: Props = $props();
@@ -31,6 +33,11 @@
     isOpen = false;
   };
 
+  const cancelAction = () => {
+    oncancel?.();
+    closeModal();
+  };
+
   const confirmAction = async () => {
     if ((await onConfirmClick()) !== false) {
       closeModal();
@@ -38,13 +45,13 @@
   };
 </script>
 
-<Modal bind:isOpen onclose={closeModal} class="space-y-4">
+<Modal bind:isOpen onclose={cancelAction} class="space-y-4">
   <div class="flex flex-col gap-y-2 break-keep">
     <p class="text-xl font-bold">{title}</p>
     {@render children()}
   </div>
   <div class="flex gap-x-2">
-    <Button color="gray" onclick={closeModal} class="flex-1">{cancelText}</Button>
+    <Button color="gray" onclick={cancelAction} class="flex-1">{cancelText}</Button>
     <Button onclick={confirmAction} class="flex-1">{confirmText}</Button>
   </div>
 </Modal>

src/lib/components/molecules/Categories.svelte

@@ -0,0 +1,44 @@
+<script module lang="ts">
+  import type { DataKey } from "$lib/modules/filesystem";
+
+  export interface SelectedCategory {
+    id: number;
+    dataKey?: DataKey;
+    name: string;
+  }
+</script>
+
+<script lang="ts">
+  import type { Component } from "svelte";
+  import type { SvelteHTMLElements } from "svelte/elements";
+  import { ActionEntryButton } from "$lib/components/atoms";
+  import { CategoryLabel } from "$lib/components/molecules";
+  import type { SubCategoryInfo } from "$lib/modules/filesystem";
+  import { sortEntries } from "$lib/utils";
+
+  interface Props {
+    categories: SubCategoryInfo[];
+    categoryMenuIcon?: Component<SvelteHTMLElements["svg"]>;
+    onCategoryClick: (category: SelectedCategory) => void;
+    onCategoryMenuClick?: (category: SelectedCategory) => void;
+  }
+
+  let { categories, categoryMenuIcon, onCategoryClick, onCategoryMenuClick }: Props = $props();
+
+  let categoriesWithName = $derived(sortEntries([...categories]));
+</script>
+
+{#if categoriesWithName.length > 0}
+  <div class="space-y-1">
+    {#each categoriesWithName as category (category.id)}
+      <ActionEntryButton
+        class="h-12"
+        onclick={() => onCategoryClick(category)}
+        actionButtonIcon={categoryMenuIcon}
+        onActionButtonClick={() => onCategoryMenuClick?.(category)}
+      >
+        <CategoryLabel name={category.name} />
+      </ActionEntryButton>
+    {/each}
+  </div>
+{/if}

src/lib/components/molecules/Categories/Categories.svelte

@@ -1,63 +0,0 @@
-<script lang="ts">
-  import { untrack, type Component } from "svelte";
-  import type { SvelteHTMLElements } from "svelte/elements";
-  import { get, type Writable } from "svelte/store";
-  import type { CategoryInfo } from "$lib/modules/filesystem";
-  import { SortBy, sortEntries } from "$lib/modules/util";
-  import Category from "./Category.svelte";
-  import type { SelectedCategory } from "./service";
-
-  interface Props {
-    categories: Writable<CategoryInfo | null>[];
-    categoryMenuIcon?: Component<SvelteHTMLElements["svg"]>;
-    onCategoryClick: (category: SelectedCategory) => void;
-    onCategoryMenuClick?: (category: SelectedCategory) => void;
-    sortBy?: SortBy;
-  }
-
-  let {
-    categories,
-    categoryMenuIcon,
-    onCategoryClick,
-    onCategoryMenuClick,
-    sortBy = SortBy.NAME_ASC,
-  }: Props = $props();
-
-  let categoriesWithName: { name?: string; info: Writable<CategoryInfo | null> }[] = $state([]);
-
-  $effect(() => {
-    categoriesWithName = categories.map((category) => ({
-      name: get(category)?.name,
-      info: category,
-    }));
-
-    const sort = () => {
-      sortEntries(categoriesWithName, sortBy);
-    };
-    return untrack(() => {
-      sort();
-
-      const unsubscribes = categoriesWithName.map((category) =>
-        category.info.subscribe((value) => {
-          if (category.name === value?.name) return;
-          category.name = value?.name;
-          sort();
-        }),
-      );
-      return () => unsubscribes.forEach((unsubscribe) => unsubscribe());
-    });
-  });
-</script>
-
-{#if categoriesWithName.length > 0}
-  <div class="space-y-1">
-    {#each categoriesWithName as { info }}
-      <Category
-        {info}
-        menuIcon={categoryMenuIcon}
-        onclick={onCategoryClick}
-        onMenuClick={onCategoryMenuClick}
-      />
-    {/each}
-  </div>
-{/if}

src/lib/components/molecules/Categories/Category.svelte

@@ -1,43 +0,0 @@
-<script lang="ts">
-  import type { Component } from "svelte";
-  import type { SvelteHTMLElements } from "svelte/elements";
-  import type { Writable } from "svelte/store";
-  import { ActionEntryButton } from "$lib/components/atoms";
-  import { CategoryLabel } from "$lib/components/molecules";
-  import type { CategoryInfo } from "$lib/modules/filesystem";
-  import type { SelectedCategory } from "./service";
-
-  interface Props {
-    info: Writable<CategoryInfo | null>;
-    menuIcon?: Component<SvelteHTMLElements["svg"]>;
-    onclick: (category: SelectedCategory) => void;
-    onMenuClick?: (category: SelectedCategory) => void;
-  }
-
-  let { info, menuIcon, onclick, onMenuClick }: Props = $props();
-
-  const openCategory = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as CategoryInfo;
-    if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
-
-    onclick({ id, dataKey, dataKeyVersion, name });
-  };
-
-  const openMenu = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as CategoryInfo;
-    if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
-
-    onMenuClick!({ id, dataKey, dataKeyVersion, name });
-  };
-</script>
-
-{#if $info}
-  <ActionEntryButton
-    class="h-12"
-    onclick={openCategory}
-    actionButtonIcon={menuIcon}
-    onActionButtonClick={openMenu}
-  >
-    <CategoryLabel name={$info.name!} />
-  </ActionEntryButton>
-{/if}

src/lib/components/molecules/Categories/index.ts

@@ -1,2 +0,0 @@
-export { default } from "./Categories.svelte";
-export * from "./service";

src/lib/components/molecules/Categories/service.ts

@@ -1,6 +0,0 @@
-export interface SelectedCategory {
-  id: number;
-  dataKey: CryptoKey;
-  dataKeyVersion: Date;
-  name: string;
-}

src/lib/components/molecules/SubCategories.svelte

@@ -1,10 +1,8 @@
 <script lang="ts">
   import type { Component } from "svelte";
   import type { ClassValue, SvelteHTMLElements } from "svelte/elements";
-  import type { Writable } from "svelte/store";
   import { Categories, IconEntryButton, type SelectedCategory } from "$lib/components/molecules";
-  import { getCategoryInfo, type CategoryInfo } from "$lib/modules/filesystem";
+  import type { CategoryInfo } from "$lib/modules/filesystem";
-  import { masterKeyStore } from "$lib/stores";
 
   import IconAddCircle from "~icons/material-symbols/add-circle";
 
@@ -27,14 +25,6 @@
     subCategoryCreatePosition = "bottom",
     subCategoryMenuIcon,
   }: Props = $props();
-
-  let subCategories: Writable<CategoryInfo | null>[] = $state([]);
-
-  $effect(() => {
-    subCategories = info.subCategoryIds.map((id) =>
-      getCategoryInfo(id, $masterKeyStore?.get(1)?.key!),
-    );
-  });
 </script>
 
 <div class={["space-y-1", className]}>
@@ -53,14 +43,12 @@
   {#if subCategoryCreatePosition === "top"}
     {@render subCategoryCreate()}
   {/if}
-  {#key info}
   <Categories
-      categories={subCategories}
+    categories={info.subCategories}
     categoryMenuIcon={subCategoryMenuIcon}
     onCategoryClick={onSubCategoryClick}
     onCategoryMenuClick={onSubCategoryMenuClick}
   />
-  {/key}
   {#if subCategoryCreatePosition === "bottom"}
     {@render subCategoryCreate()}
   {/if}

src/lib/components/molecules/index.ts

@@ -1,7 +1,7 @@
 export * from "./ActionModal.svelte";
 export { default as ActionModal } from "./ActionModal.svelte";
-export * from "./Categories";
+export * from "./Categories.svelte";
-export { default as Categories } from "./Categories";
+export { default as Categories } from "./Categories.svelte";
 export { default as IconEntryButton } from "./IconEntryButton.svelte";
 export * from "./labels";
 export { default as SubCategories } from "./SubCategories.svelte";

src/lib/components/molecules/labels/DirectoryEntryLabel.svelte

@@ -3,6 +3,7 @@
   import { IconLabel } from "$lib/components/molecules";
 
   import IconFolder from "~icons/material-symbols/folder";
+  import IconDriveFolderUpload from "~icons/material-symbols/drive-folder-upload";
   import IconDraft from "~icons/material-symbols/draft";
 
   interface Props {
@@ -10,19 +11,40 @@
     name: string;
     subtext?: string;
     textClass?: ClassValue;
-    type: "directory" | "file";
+    thumbnail?: string;
+    type: "directory" | "parent-directory" | "file";
   }
 
-  let { class: className, name, subtext, textClass: textClassName, type }: Props = $props();
+  let {
+    class: className,
+    name,
+    subtext,
+    textClass: textClassName,
+    thumbnail,
+    type,
+  }: Props = $props();
 </script>
 
+{#snippet iconSnippet()}
+  <div class="flex h-10 w-10 items-center justify-center text-xl">
+    {#if thumbnail}
+      <img src={thumbnail} alt={name} loading="lazy" class="aspect-square rounded object-cover" />
+    {:else if type === "directory"}
+      <IconFolder />
+    {:else if type === "parent-directory"}
+      <IconDriveFolderUpload class="text-yellow-500" />
+    {:else}
+      <IconDraft class="text-blue-400" />
+    {/if}
+  </div>
+{/snippet}
+
 {#snippet subtextSnippet()}
   {subtext}
 {/snippet}
 
 <IconLabel
-  icon={type === "directory" ? IconFolder : IconDraft}
+  {iconSnippet}
-  iconClass={type === "file" ? "text-blue-400" : undefined}
   subtext={subtext ? subtextSnippet : undefined}
   class={className}
   textClass={textClassName}

src/lib/components/molecules/labels/IconLabel.svelte

@@ -5,8 +5,9 @@
   interface Props {
     children: Snippet;
     class?: ClassValue;
-    icon: Component<SvelteHTMLElements["svg"]>;
+    icon?: Component<SvelteHTMLElements["svg"]>;
     iconClass?: ClassValue;
+    iconSnippet?: Snippet;
     subtext?: Snippet;
     textClass?: ClassValue;
   }
@@ -16,15 +17,22 @@
     class: className,
     icon: Icon,
     iconClass: iconClassName,
+    iconSnippet,
     subtext,
     textClass: textClassName,
   }: Props = $props();
 </script>
 
 <div class={["flex items-center gap-x-4", className]}>
+  {#if iconSnippet}
+    <div class={["flex-shrink-0", iconClassName]}>
+      {@render iconSnippet()}
+    </div>
+  {:else if Icon}
     <div class={["flex-shrink-0 text-lg", iconClassName]}>
       <Icon />
     </div>
+  {/if}
   <div class="flex flex-grow flex-col overflow-x-hidden text-left">
     <p class={["truncate font-medium", textClassName]}>
       {@render children()}

src/lib/components/organisms/Category/Category.svelte

@@ -1,107 +0,0 @@
-<script lang="ts">
-  import { untrack } from "svelte";
-  import { get, type Writable } from "svelte/store";
-  import { CheckBox } from "$lib/components/atoms";
-  import { SubCategories, type SelectedCategory } from "$lib/components/molecules";
-  import { getFileInfo, type FileInfo, type CategoryInfo } from "$lib/modules/filesystem";
-  import { SortBy, sortEntries } from "$lib/modules/util";
-  import { masterKeyStore } from "$lib/stores";
-  import File from "./File.svelte";
-  import type { SelectedFile } from "./service";
-
-  import IconMoreVert from "~icons/material-symbols/more-vert";
-
-  interface Props {
-    info: CategoryInfo;
-    onFileClick: (file: SelectedFile) => void;
-    onFileRemoveClick: (file: SelectedFile) => void;
-    onSubCategoryClick: (subCategory: SelectedCategory) => void;
-    onSubCategoryCreateClick: () => void;
-    onSubCategoryMenuClick: (subCategory: SelectedCategory) => void;
-    sortBy?: SortBy;
-    isFileRecursive: boolean;
-  }
-
-  let {
-    info,
-    onFileClick,
-    onFileRemoveClick,
-    onSubCategoryClick,
-    onSubCategoryCreateClick,
-    onSubCategoryMenuClick,
-    sortBy = SortBy.NAME_ASC,
-    isFileRecursive = $bindable(),
-  }: Props = $props();
-
-  let files: { name?: string; info: Writable<FileInfo | null>; isRecursive: boolean }[] = $state(
-    [],
-  );
-
-  $effect(() => {
-    files =
-      info.files
-        ?.filter(({ isRecursive }) => isFileRecursive || !isRecursive)
-        .map(({ id, isRecursive }) => {
-          const info = getFileInfo(id, $masterKeyStore?.get(1)?.key!);
-          return {
-            name: get(info)?.name,
-            info,
-            isRecursive,
-          };
-        }) ?? [];
-
-    const sort = () => {
-      sortEntries(files, sortBy);
-    };
-    return untrack(() => {
-      sort();
-
-      const unsubscribes = files.map((file) =>
-        file.info.subscribe((value) => {
-          if (file.name === value?.name) return;
-          file.name = value?.name;
-          sort();
-        }),
-      );
-      return () => unsubscribes.forEach((unsubscribe) => unsubscribe());
-    });
-  });
-</script>
-
-<div class="space-y-4">
-  <div class="space-y-4 bg-white p-4">
-    {#if info.id !== "root"}
-      <p class="text-lg font-bold text-gray-800">하위 카테고리</p>
-    {/if}
-    <SubCategories
-      {info}
-      {onSubCategoryClick}
-      {onSubCategoryCreateClick}
-      {onSubCategoryMenuClick}
-      subCategoryMenuIcon={IconMoreVert}
-    />
-  </div>
-  {#if info.id !== "root"}
-    <div class="space-y-4 bg-white p-4">
-      <div class="flex items-center justify-between">
-        <p class="text-lg font-bold text-gray-800">파일</p>
-        <CheckBox bind:checked={isFileRecursive}>
-          <p class="font-medium">하위 카테고리의 파일</p>
-        </CheckBox>
-      </div>
-      <div class="space-y-1">
-        {#key info}
-          {#each files as { info, isRecursive }}
-            <File
-              {info}
-              onclick={onFileClick}
-              onRemoveClick={!isRecursive ? onFileRemoveClick : undefined}
-            />
-          {:else}
-            <p class="text-gray-500 text-center">이 카테고리에 추가된 파일이 없어요.</p>
-          {/each}
-        {/key}
-      </div>
-    </div>
-  {/if}
-</div>

src/lib/components/organisms/Category/File.svelte

@@ -1,42 +0,0 @@
-<script lang="ts">
-  import type { Writable } from "svelte/store";
-  import { ActionEntryButton } from "$lib/components/atoms";
-  import { DirectoryEntryLabel } from "$lib/components/molecules";
-  import type { FileInfo } from "$lib/modules/filesystem";
-  import type { SelectedFile } from "./service";
-
-  import IconClose from "~icons/material-symbols/close";
-
-  interface Props {
-    info: Writable<FileInfo | null>;
-    onclick: (selectedFile: SelectedFile) => void;
-    onRemoveClick?: (selectedFile: SelectedFile) => void;
-  }
-
-  let { info, onclick, onRemoveClick }: Props = $props();
-
-  const openFile = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as FileInfo;
-    if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
-
-    onclick({ id, dataKey, dataKeyVersion, name });
-  };
-
-  const removeFile = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as FileInfo;
-    if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
-
-    onRemoveClick!({ id, dataKey, dataKeyVersion, name });
-  };
-</script>
-
-{#if $info}
-  <ActionEntryButton
-    class="h-12"
-    onclick={openFile}
-    actionButtonIcon={onRemoveClick && IconClose}
-    onActionButtonClick={removeFile}
-  >
-    <DirectoryEntryLabel type="file" name={$info.name} />
-  </ActionEntryButton>
-{/if}

src/lib/components/organisms/Category/index.ts

@@ -1,2 +0,0 @@
-export { default } from "./Category.svelte";
-export * from "./service";

src/lib/components/organisms/Category/service.ts

@@ -1,6 +0,0 @@
-export interface SelectedFile {
-  id: number;
-  dataKey: CryptoKey;
-  dataKeyVersion: Date;
-  name: string;
-}

src/lib/components/organisms/index.ts

@@ -1,3 +1 @@
-export * from "./Category";
-export { default as Category } from "./Category";
 export * from "./modals";

src/lib/components/organisms/modals/ForceLoginModal.svelte

@@ -0,0 +1,22 @@
+<script lang="ts">
+  import { ActionModal } from "$lib/components/molecules";
+
+  interface Props {
+    isOpen: boolean;
+    oncancel?: () => void;
+    onLoginClick: () => void;
+  }
+
+  let { isOpen = $bindable(), oncancel, onLoginClick }: Props = $props();
+</script>
+
+<ActionModal
+  bind:isOpen
+  title="다른 디바이스에 이미 로그인되어 있어요."
+  cancelText="아니요"
+  {oncancel}
+  confirmText="네"
+  onConfirmClick={onLoginClick}
+>
+  <p>다른 디바이스에서는 로그아웃하고, 이 디바이스에서 로그인할까요?</p>
+</ActionModal>

src/lib/components/organisms/modals/index.ts

@@ -1,3 +1,4 @@
 export { default as CategoryCreateModal } from "./CategoryCreateModal.svelte";
+export { default as ForceLoginModal } from "./ForceLoginModal.svelte";
 export { default as RenameModal } from "./RenameModal.svelte";
 export { default as TextInputModal } from "./TextInputModal.svelte";

src/lib/constants/index.ts

@@ -0,0 +1,2 @@
+export * from "./serviceWorker";
+export * from "./upload";

src/lib/constants/serviceWorker.ts

@@ -0,0 +1 @@
+export const DECRYPTED_FILE_URL_PREFIX = "/_internal/decryptedFile/";

src/lib/constants/upload.ts

@@ -0,0 +1,6 @@
+export const AES_GCM_IV_SIZE = 12;
+export const AES_GCM_TAG_SIZE = 16;
+export const ENCRYPTION_OVERHEAD = AES_GCM_IV_SIZE + AES_GCM_TAG_SIZE;
+
+export const CHUNK_SIZE = 4 * 1024 * 1024; // 4 MiB
+export const ENCRYPTED_CHUNK_SIZE = CHUNK_SIZE + ENCRYPTION_OVERHEAD;

src/lib/hooks/callApi.ts

@@ -1,11 +0,0 @@
-export const callGetApi = async (input: RequestInfo, fetchInternal = fetch) => {
-  return await fetchInternal(input);
-};
-
-export const callPostApi = async <T>(input: RequestInfo, payload?: T, fetchInternal = fetch) => {
-  return await fetchInternal(input, {
-    method: "POST",
-    headers: { "Content-Type": "application/json" },
-    body: payload ? JSON.stringify(payload) : undefined,
-  });
-};

src/lib/hooks/index.ts

@@ -1,2 +0,0 @@
-export * from "./callApi";
-export * from "./gotoStateful";

src/lib/indexedDB/filesystem.ts

@@ -1,7 +1,5 @@
 import { Dexie, type EntityTable } from "dexie";
 
-export type DirectoryId = "root" | number;
-
 interface DirectoryInfo {
   id: number;
   parentId: DirectoryId;
@@ -15,16 +13,15 @@ interface FileInfo {
   contentType: string;
   createdAt?: Date;
   lastModifiedAt: Date;
-  categoryIds: number[];
+  categoryIds?: number[];
 }
 
-export type CategoryId = "root" | number;
-
 interface CategoryInfo {
   id: number;
   parentId: CategoryId;
   name: string;
-  files: { id: number; isRecursive: boolean }[];
+  files?: { id: number; isRecursive: boolean }[];
+  isFileRecursive?: boolean;
 }
 
 const filesystem = new Dexie("filesystem") as Dexie & {
@@ -33,11 +30,21 @@ const filesystem = new Dexie("filesystem") as Dexie & {
   category: EntityTable<CategoryInfo, "id">;
 };
 
-filesystem.version(2).stores({
+filesystem
+  .version(3)
+  .stores({
     directory: "id, parentId",
     file: "id, parentId",
     category: "id, parentId",
-});
+  })
+  .upgrade(async (trx) => {
+    await trx
+      .table("category")
+      .toCollection()
+      .modify((category) => {
+        category.isFileRecursive = false;
+      });
+  });
 
 export const getDirectoryInfos = async (parentId: DirectoryId) => {
   return await filesystem.directory.where({ parentId }).toArray();
@@ -48,13 +55,27 @@ export const getDirectoryInfo = async (id: number) => {
 };
 
 export const storeDirectoryInfo = async (directoryInfo: DirectoryInfo) => {
-  await filesystem.directory.put(directoryInfo);
+  await filesystem.directory.upsert(directoryInfo.id, { ...directoryInfo });
 };
 
 export const deleteDirectoryInfo = async (id: number) => {
   await filesystem.directory.delete(id);
 };
 
+export const deleteDanglingDirectoryInfos = async (
+  parentId: DirectoryId,
+  validIds: Set<number>,
+) => {
+  await filesystem.directory
+    .where({ parentId })
+    .and((directory) => !validIds.has(directory.id))
+    .delete();
+};
+
+export const getAllFileInfos = async () => {
+  return await filesystem.file.toArray();
+};
+
 export const getFileInfos = async (parentId: DirectoryId) => {
   return await filesystem.file.where({ parentId }).toArray();
 };
@@ -63,14 +84,29 @@ export const getFileInfo = async (id: number) => {
   return await filesystem.file.get(id);
 };
 
+export const bulkGetFileInfos = async (ids: number[]) => {
+  return await filesystem.file.bulkGet(ids);
+};
+
 export const storeFileInfo = async (fileInfo: FileInfo) => {
-  await filesystem.file.put(fileInfo);
+  await filesystem.file.upsert(fileInfo.id, { ...fileInfo });
 };
 
 export const deleteFileInfo = async (id: number) => {
   await filesystem.file.delete(id);
 };
 
+export const bulkDeleteFileInfos = async (ids: number[]) => {
+  await filesystem.file.bulkDelete(ids);
+};
+
+export const deleteDanglingFileInfos = async (parentId: DirectoryId, validIds: Set<number>) => {
+  await filesystem.file
+    .where({ parentId })
+    .and((file) => !validIds.has(file.id))
+    .delete();
+};
+
 export const getCategoryInfos = async (parentId: CategoryId) => {
   return await filesystem.category.where({ parentId }).toArray();
 };
@@ -80,13 +116,24 @@ export const getCategoryInfo = async (id: number) => {
 };
 
 export const storeCategoryInfo = async (categoryInfo: CategoryInfo) => {
-  await filesystem.category.put(categoryInfo);
+  await filesystem.category.upsert(categoryInfo.id, { ...categoryInfo });
+};
+
+export const updateCategoryInfo = async (id: number, changes: { isFileRecursive?: boolean }) => {
+  await filesystem.category.update(id, changes);
 };
 
 export const deleteCategoryInfo = async (id: number) => {
   await filesystem.category.delete(id);
 };
 
+export const deleteDanglingCategoryInfos = async (parentId: CategoryId, validIds: Set<number>) => {
+  await filesystem.category
+    .where({ parentId })
+    .and((category) => !validIds.has(category.id))
+    .delete();
+};
+
 export const cleanupDanglingInfos = async () => {
   const validDirectoryIds: number[] = [];
   const validFileIds: number[] = [];

src/lib/indexedDB/keyStore.ts

@@ -70,12 +70,12 @@ export const storeMasterKeys = async (keys: MasterKey[]) => {
 };
 
 export const getHmacSecrets = async () => {
-  return await keyStore.hmacSecret.toArray();
+  return (await keyStore.hmacSecret.toArray()).filter(({ secret }) => secret.extractable);
 };
 
 export const storeHmacSecrets = async (secrets: HmacSecret[]) => {
-  if (secrets.some(({ secret }) => secret.extractable)) {
+  if (secrets.some(({ secret }) => !secret.extractable)) {
-    throw new Error("Hmac secrets must be nonextractable");
+    throw new Error("Hmac secrets must be extractable");
   }
   await keyStore.hmacSecret.bulkPut(secrets);
 };

src/lib/modules/crypto/aes.ts

@@ -1,8 +1,15 @@
-import { encodeString, decodeString, encodeToBase64, decodeFromBase64 } from "./util";
+import { AES_GCM_IV_SIZE } from "$lib/constants";
+import {
+  encodeString,
+  decodeString,
+  encodeToBase64,
+  decodeFromBase64,
+  concatenateBuffers,
+} from "./utils";
 
 export const generateMasterKey = async () => {
   return {
-    masterKey: await window.crypto.subtle.generateKey(
+    masterKey: await crypto.subtle.generateKey(
       {
         name: "AES-KW",
         length: 256,
@@ -15,7 +22,7 @@ export const generateMasterKey = async () => {
 
 export const generateDataKey = async () => {
   return {
-    dataKey: await window.crypto.subtle.generateKey(
+    dataKey: await crypto.subtle.generateKey(
       {
         name: "AES-GCM",
         length: 256,
@@ -28,9 +35,9 @@ export const generateDataKey = async () => {
 };
 
 export const makeAESKeyNonextractable = async (key: CryptoKey) => {
-  return await window.crypto.subtle.importKey(
+  return await crypto.subtle.importKey(
     "raw",
-    await window.crypto.subtle.exportKey("raw", key),
+    await crypto.subtle.exportKey("raw", key),
     key.algorithm,
     false,
     key.usages,
@@ -38,12 +45,12 @@ export const makeAESKeyNonextractable = async (key: CryptoKey) => {
 };
 
 export const wrapDataKey = async (dataKey: CryptoKey, masterKey: CryptoKey) => {
-  return encodeToBase64(await window.crypto.subtle.wrapKey("raw", dataKey, masterKey, "AES-KW"));
+  return encodeToBase64(await crypto.subtle.wrapKey("raw", dataKey, masterKey, "AES-KW"));
 };
 
 export const unwrapDataKey = async (dataKeyWrapped: string, masterKey: CryptoKey) => {
   return {
-    dataKey: await window.crypto.subtle.unwrapKey(
+    dataKey: await crypto.subtle.unwrapKey(
       "raw",
       decodeFromBase64(dataKeyWrapped),
       masterKey,
@@ -56,12 +63,12 @@ export const unwrapDataKey = async (dataKeyWrapped: string, masterKey: CryptoKey
 };
 
 export const wrapHmacSecret = async (hmacSecret: CryptoKey, masterKey: CryptoKey) => {
-  return encodeToBase64(await window.crypto.subtle.wrapKey("raw", hmacSecret, masterKey, "AES-KW"));
+  return encodeToBase64(await crypto.subtle.wrapKey("raw", hmacSecret, masterKey, "AES-KW"));
 };
 
 export const unwrapHmacSecret = async (hmacSecretWrapped: string, masterKey: CryptoKey) => {
   return {
-    hmacSecret: await window.crypto.subtle.unwrapKey(
+    hmacSecret: await crypto.subtle.unwrapKey(
       "raw",
       decodeFromBase64(hmacSecretWrapped),
       masterKey,
@@ -70,15 +77,15 @@ export const unwrapHmacSecret = async (hmacSecretWrapped: string, masterKey: Cry
         name: "HMAC",
         hash: "SHA-256",
       } satisfies HmacImportParams,
-      false, // Nonextractable
+      true, // Extractable
       ["sign", "verify"],
     ),
   };
 };
 
 export const encryptData = async (data: BufferSource, dataKey: CryptoKey) => {
-  const iv = window.crypto.getRandomValues(new Uint8Array(12));
+  const iv = crypto.getRandomValues(new Uint8Array(12));
-  const ciphertext = await window.crypto.subtle.encrypt(
+  const ciphertext = await crypto.subtle.encrypt(
     {
       name: "AES-GCM",
       iv,
@@ -86,14 +93,18 @@ export const encryptData = async (data: BufferSource, dataKey: CryptoKey) => {
     dataKey,
     data,
   );
-  return { ciphertext, iv: encodeToBase64(iv.buffer) };
+  return { ciphertext, iv: iv.buffer };
 };
 
-export const decryptData = async (ciphertext: BufferSource, iv: string, dataKey: CryptoKey) => {
+export const decryptData = async (
-  return await window.crypto.subtle.decrypt(
+  ciphertext: BufferSource,
+  iv: string | BufferSource,
+  dataKey: CryptoKey,
+) => {
+  return await crypto.subtle.decrypt(
     {
       name: "AES-GCM",
-      iv: decodeFromBase64(iv),
+      iv: typeof iv === "string" ? decodeFromBase64(iv) : iv,
     } satisfies AesGcmParams,
     dataKey,
     ciphertext,
@@ -102,9 +113,22 @@ export const decryptData = async (ciphertext: BufferSource, iv: string, dataKey:
 
 export const encryptString = async (plaintext: string, dataKey: CryptoKey) => {
   const { ciphertext, iv } = await encryptData(encodeString(plaintext), dataKey);
-  return { ciphertext: encodeToBase64(ciphertext), iv };
+  return { ciphertext: encodeToBase64(ciphertext), iv: encodeToBase64(iv) };
 };
 
 export const decryptString = async (ciphertext: string, iv: string, dataKey: CryptoKey) => {
   return decodeString(await decryptData(decodeFromBase64(ciphertext), iv, dataKey));
 };
+
+export const encryptChunk = async (chunk: ArrayBuffer, dataKey: CryptoKey) => {
+  const { ciphertext, iv } = await encryptData(chunk, dataKey);
+  return concatenateBuffers(iv, ciphertext).buffer;
+};
+
+export const decryptChunk = async (encryptedChunk: ArrayBuffer, dataKey: CryptoKey) => {
+  return await decryptData(
+    encryptedChunk.slice(AES_GCM_IV_SIZE),
+    encryptedChunk.slice(0, AES_GCM_IV_SIZE),
+    dataKey,
+  );
+};

src/lib/modules/crypto/index.ts

@@ -1,4 +1,4 @@
 export * from "./aes";
 export * from "./rsa";
 export * from "./sha";
-export * from "./util";
+export * from "./utils";

src/lib/modules/crypto/rsa.ts

@@ -1,7 +1,7 @@
-import { encodeString, encodeToBase64, decodeFromBase64 } from "./util";
+import { encodeString, encodeToBase64, decodeFromBase64 } from "./utils";
 
 export const generateEncryptionKeyPair = async () => {
-  const keyPair = await window.crypto.subtle.generateKey(
+  const keyPair = await crypto.subtle.generateKey(
     {
       name: "RSA-OAEP",
       modulusLength: 4096,
@@ -18,7 +18,7 @@ export const generateEncryptionKeyPair = async () => {
 };
 
 export const generateSigningKeyPair = async () => {
-  const keyPair = await window.crypto.subtle.generateKey(
+  const keyPair = await crypto.subtle.generateKey(
     {
       name: "RSA-PSS",
       modulusLength: 4096,
@@ -37,7 +37,7 @@ export const generateSigningKeyPair = async () => {
 export const exportRSAKey = async (key: CryptoKey) => {
   const format = key.type === "public" ? ("spki" as const) : ("pkcs8" as const);
   return {
-    key: await window.crypto.subtle.exportKey(format, key),
+    key: await crypto.subtle.exportKey(format, key),
     format,
   };
 };
@@ -46,19 +46,63 @@ export const exportRSAKeyToBase64 = async (key: CryptoKey) => {
   return encodeToBase64((await exportRSAKey(key)).key);
 };
 
+export const importEncryptionKeyPairFromBase64 = async (
+  encryptKeyBase64: string,
+  decryptKeyBase64: string,
+) => {
+  const algorithm: RsaHashedImportParams = {
+    name: "RSA-OAEP",
+    hash: "SHA-256",
+  };
+  const encryptKey = await crypto.subtle.importKey(
+    "spki",
+    decodeFromBase64(encryptKeyBase64),
+    algorithm,
+    true,
+    ["encrypt", "wrapKey"],
+  );
+  const decryptKey = await crypto.subtle.importKey(
+    "pkcs8",
+    decodeFromBase64(decryptKeyBase64),
+    algorithm,
+    true,
+    ["decrypt", "unwrapKey"],
+  );
+  return { encryptKey, decryptKey };
+};
+
+export const importSigningKeyPairFromBase64 = async (
+  signKeyBase64: string,
+  verifyKeyBase64: string,
+) => {
+  const algorithm: RsaHashedImportParams = {
+    name: "RSA-PSS",
+    hash: "SHA-256",
+  };
+  const signKey = await crypto.subtle.importKey(
+    "pkcs8",
+    decodeFromBase64(signKeyBase64),
+    algorithm,
+    true,
+    ["sign"],
+  );
+  const verifyKey = await crypto.subtle.importKey(
+    "spki",
+    decodeFromBase64(verifyKeyBase64),
+    algorithm,
+    true,
+    ["verify"],
+  );
+  return { signKey, verifyKey };
+};
+
 export const makeRSAKeyNonextractable = async (key: CryptoKey) => {
   const { key: exportedKey, format } = await exportRSAKey(key);
-  return await window.crypto.subtle.importKey(
+  return await crypto.subtle.importKey(format, exportedKey, key.algorithm, false, key.usages);
-    format,
-    exportedKey,
-    key.algorithm,
-    false,
-    key.usages,
-  );
 };
 
 export const decryptChallenge = async (challenge: string, decryptKey: CryptoKey) => {
-  return await window.crypto.subtle.decrypt(
+  return await crypto.subtle.decrypt(
     {
       name: "RSA-OAEP",
     } satisfies RsaOaepParams,
@@ -69,7 +113,7 @@ export const decryptChallenge = async (challenge: string, decryptKey: CryptoKey)
 
 export const wrapMasterKey = async (masterKey: CryptoKey, encryptKey: CryptoKey) => {
   return encodeToBase64(
-    await window.crypto.subtle.wrapKey("raw", masterKey, encryptKey, {
+    await crypto.subtle.wrapKey("raw", masterKey, encryptKey, {
       name: "RSA-OAEP",
     } satisfies RsaOaepParams),
   );
@@ -81,7 +125,7 @@ export const unwrapMasterKey = async (
   extractable = false,
 ) => {
   return {
-    masterKey: await window.crypto.subtle.unwrapKey(
+    masterKey: await crypto.subtle.unwrapKey(
       "raw",
       decodeFromBase64(masterKeyWrapped),
       decryptKey,
@@ -96,7 +140,7 @@ export const unwrapMasterKey = async (
 };
 
 export const signMessageRSA = async (message: BufferSource, signKey: CryptoKey) => {
-  return await window.crypto.subtle.sign(
+  return await crypto.subtle.sign(
     {
       name: "RSA-PSS",
       saltLength: 32, // SHA-256
@@ -111,7 +155,7 @@ export const verifySignatureRSA = async (
   signature: BufferSource,
   verifyKey: CryptoKey,
 ) => {
-  return await window.crypto.subtle.verify(
+  return await crypto.subtle.verify(
     {
       name: "RSA-PSS",
       saltLength: 32, // SHA-256

src/lib/modules/crypto/sha.ts

@@ -1,10 +1,13 @@
+import { hmac } from "@noble/hashes/hmac.js";
+import { sha256 } from "@noble/hashes/sha2.js";
+
 export const digestMessage = async (message: BufferSource) => {
-  return await window.crypto.subtle.digest("SHA-256", message);
+  return await crypto.subtle.digest("SHA-256", message);
 };
 
 export const generateHmacSecret = async () => {
   return {
-    hmacSecret: await window.crypto.subtle.generateKey(
+    hmacSecret: await crypto.subtle.generateKey(
       {
         name: "HMAC",
         hash: "SHA-256",
@@ -15,6 +18,10 @@ export const generateHmacSecret = async () => {
   };
 };
 
-export const signMessageHmac = async (message: BufferSource, hmacSecret: CryptoKey) => {
+export const createHmacStream = async (hmacSecret: CryptoKey) => {
-  return await window.crypto.subtle.sign("HMAC", hmacSecret, message);
+  const h = hmac.create(sha256, new Uint8Array(await crypto.subtle.exportKey("raw", hmacSecret)));
+  return {
+    update: (data: Uint8Array) => h.update(data),
+    digest: () => h.digest(),
+  };
 };

src/lib/modules/crypto/utils.ts

@@ -9,8 +9,8 @@ export const decodeString = (data: ArrayBuffer) => {
   return textDecoder.decode(data);
 };
 
-export const encodeToBase64 = (data: ArrayBuffer) => {
+export const encodeToBase64 = (data: ArrayBuffer | Uint8Array) => {
-  return btoa(String.fromCharCode(...new Uint8Array(data)));
+  return btoa(String.fromCharCode(...(data instanceof ArrayBuffer ? new Uint8Array(data) : data)));
 };
 
 export const decodeFromBase64 = (data: string) => {

src/lib/modules/file/download.svelte.ts

@@ -0,0 +1,110 @@
+import axios from "axios";
+import { limitFunction } from "p-limit";
+import { CHUNK_SIZE, ENCRYPTION_OVERHEAD } from "$lib/constants";
+import { decryptChunk, concatenateBuffers } from "$lib/modules/crypto";
+
+export interface FileDownloadState {
+  id: number;
+  status:
+    | "download-pending"
+    | "downloading"
+    | "decryption-pending"
+    | "decrypting"
+    | "decrypted"
+    | "canceled"
+    | "error";
+  progress?: number;
+  rate?: number;
+  estimated?: number;
+  result?: ArrayBuffer;
+}
+
+type LiveFileDownloadState = FileDownloadState & {
+  status: "download-pending" | "downloading" | "decryption-pending" | "decrypting";
+};
+
+let downloadingFiles: FileDownloadState[] = $state([]);
+
+export const isFileDownloading = (
+  status: FileDownloadState["status"],
+): status is LiveFileDownloadState["status"] =>
+  ["download-pending", "downloading", "decryption-pending", "decrypting"].includes(status);
+
+export const getFileDownloadState = (fileId: number) => {
+  return downloadingFiles.find((file) => file.id === fileId && isFileDownloading(file.status));
+};
+
+export const getDownloadingFiles = () => {
+  return downloadingFiles.filter((file) => isFileDownloading(file.status));
+};
+
+export const clearDownloadedFiles = () => {
+  downloadingFiles = downloadingFiles.filter((file) => isFileDownloading(file.status));
+};
+
+const requestFileDownload = limitFunction(
+  async (state: FileDownloadState, id: number) => {
+    state.status = "downloading";
+
+    const res = await axios.get(`/api/file/${id}/download`, {
+      responseType: "arraybuffer",
+      onDownloadProgress: ({ progress, rate, estimated }) => {
+        state.progress = progress;
+        state.rate = rate;
+        state.estimated = estimated;
+      },
+    });
+    const fileEncrypted: ArrayBuffer = res.data;
+
+    state.status = "decryption-pending";
+    return fileEncrypted;
+  },
+  { concurrency: 1 },
+);
+
+const decryptFile = limitFunction(
+  async (
+    state: FileDownloadState,
+    fileEncrypted: ArrayBuffer,
+    encryptedChunkSize: number,
+    dataKey: CryptoKey,
+  ) => {
+    state.status = "decrypting";
+
+    const chunks: ArrayBuffer[] = [];
+    let offset = 0;
+
+    while (offset < fileEncrypted.byteLength) {
+      const nextOffset = Math.min(offset + encryptedChunkSize, fileEncrypted.byteLength);
+      chunks.push(await decryptChunk(fileEncrypted.slice(offset, nextOffset), dataKey));
+      offset = nextOffset;
+    }
+
+    const fileBuffer = concatenateBuffers(...chunks).buffer;
+    state.status = "decrypted";
+    state.result = fileBuffer;
+    return fileBuffer;
+  },
+  { concurrency: 4 },
+);
+
+export const downloadFile = async (id: number, dataKey: CryptoKey, isLegacy: boolean) => {
+  downloadingFiles.push({
+    id,
+    status: "download-pending",
+  });
+  const state = downloadingFiles.at(-1)!;
+
+  try {
+    const fileEncrypted = await requestFileDownload(state, id);
+    return await decryptFile(
+      state,
+      fileEncrypted,
+      isLegacy ? fileEncrypted.byteLength : CHUNK_SIZE + ENCRYPTION_OVERHEAD,
+      dataKey,
+    );
+  } catch (e) {
+    state.status = "error";
+    throw e;
+  }
+};

src/lib/modules/file/download.ts

@@ -1,84 +0,0 @@
-import axios from "axios";
-import { limitFunction } from "p-limit";
-import { writable, type Writable } from "svelte/store";
-import { decryptData } from "$lib/modules/crypto";
-import { fileDownloadStatusStore, type FileDownloadStatus } from "$lib/stores";
-
-const requestFileDownload = limitFunction(
-  async (status: Writable<FileDownloadStatus>, id: number) => {
-    status.update((value) => {
-      value.status = "downloading";
-      return value;
-    });
-
-    const res = await axios.get(`/api/file/${id}/download`, {
-      responseType: "arraybuffer",
-      onDownloadProgress: ({ progress, rate, estimated }) => {
-        status.update((value) => {
-          value.progress = progress;
-          value.rate = rate;
-          value.estimated = estimated;
-          return value;
-        });
-      },
-    });
-    const fileEncrypted: ArrayBuffer = res.data;
-
-    status.update((value) => {
-      value.status = "decryption-pending";
-      return value;
-    });
-    return fileEncrypted;
-  },
-  { concurrency: 1 },
-);
-
-const decryptFile = limitFunction(
-  async (
-    status: Writable<FileDownloadStatus>,
-    fileEncrypted: ArrayBuffer,
-    fileEncryptedIv: string,
-    dataKey: CryptoKey,
-  ) => {
-    status.update((value) => {
-      value.status = "decrypting";
-      return value;
-    });
-
-    const fileBuffer = await decryptData(fileEncrypted, fileEncryptedIv, dataKey);
-
-    status.update((value) => {
-      value.status = "decrypted";
-      value.result = fileBuffer;
-      return value;
-    });
-    return fileBuffer;
-  },
-  { concurrency: 4 },
-);
-
-export const downloadFile = async (id: number, fileEncryptedIv: string, dataKey: CryptoKey) => {
-  const status = writable<FileDownloadStatus>({
-    id,
-    status: "download-pending",
-  });
-  fileDownloadStatusStore.update((value) => {
-    value.push(status);
-    return value;
-  });
-
-  try {
-    return await decryptFile(
-      status,
-      await requestFileDownload(status, id),
-      fileEncryptedIv,
-      dataKey,
-    );
-  } catch (e) {
-    status.update((value) => {
-      value.status = "error";
-      return value;
-    });
-    throw e;
-  }
-};

src/lib/modules/file/index.ts

@@ -1,3 +1,4 @@
 export * from "./cache";
-export * from "./download";
+export * from "./download.svelte";
-export * from "./upload";
+export * from "./thumbnail";
+export * from "./upload.svelte";

src/lib/modules/file/thumbnail.ts

@@ -0,0 +1,82 @@
+import { LRUCache } from "lru-cache";
+import { writable, type Writable } from "svelte/store";
+import { browser } from "$app/environment";
+import { decryptData } from "$lib/modules/crypto";
+import type { SummarizedFileInfo } from "$lib/modules/filesystem";
+import { readFile, writeFile, deleteFile, deleteDirectory } from "$lib/modules/opfs";
+import { getThumbnailUrl } from "$lib/modules/thumbnail";
+
+const loadedThumbnails = new LRUCache<number, Writable<string>>({ max: 100 });
+const loadingThumbnails = new Map<number, Writable<string | undefined>>();
+
+const fetchFromOpfs = async (fileId: number) => {
+  const thumbnailBuffer = await readFile(`/thumbnail/file/${fileId}`);
+  if (thumbnailBuffer) {
+    return getThumbnailUrl(thumbnailBuffer);
+  }
+};
+
+const fetchFromServer = async (fileId: number, dataKey: CryptoKey) => {
+  const res = await fetch(`/api/file/${fileId}/thumbnail/download`);
+  if (!res.ok) return null;
+
+  const thumbnailEncrypted = await res.arrayBuffer();
+  const thumbnailBuffer = await decryptData(
+    thumbnailEncrypted.slice(12),
+    thumbnailEncrypted.slice(0, 12),
+    dataKey,
+  );
+
+  void writeFile(`/thumbnail/file/${fileId}`, thumbnailBuffer);
+  return getThumbnailUrl(thumbnailBuffer);
+};
+
+export const getFileThumbnail = (file: SummarizedFileInfo) => {
+  if (
+    !browser ||
+    !(file.contentType.startsWith("image/") || file.contentType.startsWith("video/"))
+  ) {
+    return undefined;
+  }
+
+  const thumbnail = loadedThumbnails.get(file.id);
+  if (thumbnail) return thumbnail;
+
+  let loadingThumbnail = loadingThumbnails.get(file.id);
+  if (loadingThumbnail) return loadingThumbnail;
+
+  loadingThumbnail = writable(undefined);
+  loadingThumbnails.set(file.id, loadingThumbnail);
+
+  fetchFromOpfs(file.id)
+    .then((thumbnail) => thumbnail ?? (file.dataKey && fetchFromServer(file.id, file.dataKey.key)))
+    .then((thumbnail) => {
+      if (thumbnail) {
+        loadingThumbnail.set(thumbnail);
+        loadedThumbnails.set(file.id, loadingThumbnail as Writable<string>);
+      }
+      loadingThumbnails.delete(file.id);
+    });
+  return loadingThumbnail;
+};
+
+export const storeFileThumbnailCache = async (fileId: number, thumbnailBuffer: ArrayBuffer) => {
+  await writeFile(`/thumbnail/file/${fileId}`, thumbnailBuffer);
+
+  const oldThumbnail = loadedThumbnails.get(fileId);
+  if (oldThumbnail) {
+    oldThumbnail.set(getThumbnailUrl(thumbnailBuffer));
+  } else {
+    loadedThumbnails.set(fileId, writable(getThumbnailUrl(thumbnailBuffer)));
+  }
+};
+
+export const deleteFileThumbnailCache = async (fileId: number) => {
+  loadedThumbnails.delete(fileId);
+  await deleteFile(`/thumbnail/file/${fileId}`);
+};
+
+export const deleteAllFileThumbnailCaches = async () => {
+  loadedThumbnails.clear();
+  await deleteDirectory(`/thumbnail/file`);
+};

src/lib/modules/file/upload.svelte.ts

@@ -0,0 +1,480 @@
+import ExifReader from "exifreader";
+import pLimit, { limitFunction } from "p-limit";
+import { CHUNK_SIZE } from "$lib/constants";
+import {
+  encodeToBase64,
+  generateDataKey,
+  wrapDataKey,
+  encryptData,
+  encryptString,
+  encryptChunk,
+  digestMessage,
+  createHmacStream,
+} from "$lib/modules/crypto";
+import { Scheduler } from "$lib/modules/scheduler";
+import { generateThumbnail, generateThumbnailFromFile } from "$lib/modules/thumbnail";
+import type { MasterKey, HmacSecret } from "$lib/stores";
+import { trpc } from "$trpc/client";
+import type { RouterInputs } from "$trpc/router.server";
+
+export interface FileUploadState {
+  name: string;
+  parentId: DirectoryId;
+  status:
+    | "queued"
+    | "encryption-pending"
+    | "encrypting"
+    | "upload-pending"
+    | "uploading"
+    | "uploaded"
+    | "canceled"
+    | "error";
+  progress?: number;
+  rate?: number;
+  estimated?: number;
+}
+
+export type LiveFileUploadState = FileUploadState & {
+  status: "queued" | "encryption-pending" | "encrypting" | "upload-pending" | "uploading";
+};
+
+const scheduler = new Scheduler<
+  { fileId: number; fileBuffer?: ArrayBuffer; thumbnailBuffer?: ArrayBuffer } | undefined
+>();
+let uploadingFiles: FileUploadState[] = $state([]);
+
+const isFileUploading = (status: FileUploadState["status"]) =>
+  ["queued", "encryption-pending", "encrypting", "upload-pending", "uploading"].includes(status);
+
+export const getUploadingFiles = (parentId?: DirectoryId) => {
+  return uploadingFiles.filter(
+    (file) =>
+      (parentId === undefined || file.parentId === parentId) && isFileUploading(file.status),
+  );
+};
+
+export const clearUploadedFiles = () => {
+  uploadingFiles = uploadingFiles.filter((file) => isFileUploading(file.status));
+};
+
+const requestDuplicateFileScan = limitFunction(
+  async (file: File, hmacSecret: HmacSecret, onDuplicate: () => Promise<boolean>) => {
+    const hmacStream = await createHmacStream(hmacSecret.secret);
+    const reader = file.stream().getReader();
+
+    while (true) {
+      const { done, value } = await reader.read();
+      if (done) break;
+      hmacStream.update(value);
+    }
+
+    const fileSigned = encodeToBase64(hmacStream.digest());
+    const files = await trpc().file.listByHash.query({
+      hskVersion: hmacSecret.version,
+      contentHmac: fileSigned,
+    });
+    if (files.length === 0 || (await onDuplicate())) {
+      return { fileSigned };
+    } else {
+      return {};
+    }
+  },
+  { concurrency: 1 },
+);
+
+const getFileType = (file: File) => {
+  if (file.type) return file.type;
+  if (file.name.endsWith(".heic")) return "image/heic";
+  throw new Error("Unknown file type");
+};
+
+const extractExifDateTime = (fileBuffer: ArrayBuffer) => {
+  const exif = ExifReader.load(fileBuffer);
+  const dateTimeOriginal = exif["DateTimeOriginal"]?.description;
+  const offsetTimeOriginal = exif["OffsetTimeOriginal"]?.description;
+  if (!dateTimeOriginal) return undefined;
+
+  const [date, time] = dateTimeOriginal.split(" ");
+  if (!date || !time) return undefined;
+
+  const [year, month, day] = date.split(":").map(Number);
+  const [hour, minute, second] = time.split(":").map(Number);
+  if (!year || !month || !day || !hour || !minute || !second) return undefined;
+
+  if (!offsetTimeOriginal) {
+    // No timezone information.. Assume local timezone
+    return new Date(year, month - 1, day, hour, minute, second);
+  }
+
+  const offsetSign = offsetTimeOriginal[0] === "+" ? 1 : -1;
+  const [offsetHour, offsetMinute] = offsetTimeOriginal.slice(1).split(":").map(Number);
+
+  const utcDate = Date.UTC(year, month - 1, day, hour, minute, second);
+  const offsetMs = offsetSign * ((offsetHour ?? 0) * 60 + (offsetMinute ?? 0)) * 60 * 1000;
+  return new Date(utcDate - offsetMs);
+};
+
+const encryptChunks = async (fileBuffer: ArrayBuffer, dataKey: CryptoKey) => {
+  const chunksEncrypted: { chunkEncrypted: ArrayBuffer; chunkEncryptedHash: string }[] = [];
+  let offset = 0;
+
+  while (offset < fileBuffer.byteLength) {
+    const nextOffset = Math.min(offset + CHUNK_SIZE, fileBuffer.byteLength);
+    const chunkEncrypted = await encryptChunk(fileBuffer.slice(offset, nextOffset), dataKey);
+    chunksEncrypted.push({
+      chunkEncrypted: chunkEncrypted,
+      chunkEncryptedHash: encodeToBase64(await digestMessage(chunkEncrypted)),
+    });
+    offset = nextOffset;
+  }
+
+  return chunksEncrypted;
+};
+
+const encryptImageFile = limitFunction(
+  async (state: FileUploadState, file: File, masterKey: MasterKey) => {
+    state.status = "encrypting";
+
+    const fileBuffer = await file.arrayBuffer();
+    const createdAt = extractExifDateTime(fileBuffer);
+
+    const { dataKey, dataKeyVersion } = await generateDataKey();
+    const dataKeyWrapped = await wrapDataKey(dataKey, masterKey.key);
+    const chunksEncrypted = await encryptChunks(fileBuffer, dataKey);
+
+    const nameEncrypted = await encryptString(file.name, dataKey);
+    const createdAtEncrypted =
+      createdAt && (await encryptString(createdAt.getTime().toString(), dataKey));
+    const lastModifiedAtEncrypted = await encryptString(file.lastModified.toString(), dataKey);
+
+    const thumbnail = await generateThumbnail(fileBuffer, getFileType(file));
+    const thumbnailBuffer = await thumbnail?.arrayBuffer();
+    const thumbnailEncrypted = thumbnailBuffer && (await encryptData(thumbnailBuffer, dataKey));
+
+    state.status = "upload-pending";
+
+    return {
+      dataKeyWrapped,
+      dataKeyVersion,
+      chunksEncrypted,
+      nameEncrypted,
+      createdAtEncrypted,
+      lastModifiedAtEncrypted,
+      thumbnail: thumbnailEncrypted && { plaintext: thumbnailBuffer, ...thumbnailEncrypted },
+    };
+  },
+  { concurrency: 4 },
+);
+
+const uploadThumbnail = async (
+  fileId: number,
+  thumbnailEncrypted: { ciphertext: ArrayBuffer; iv: ArrayBuffer },
+  dataKeyVersion: Date,
+) => {
+  const { uploadId } = await trpc().upload.startFileThumbnailUpload.mutate({
+    file: fileId,
+    dekVersion: dataKeyVersion,
+  });
+
+  const ivAndCiphertext = new Uint8Array(
+    thumbnailEncrypted.iv.byteLength + thumbnailEncrypted.ciphertext.byteLength,
+  );
+  ivAndCiphertext.set(new Uint8Array(thumbnailEncrypted.iv), 0);
+  ivAndCiphertext.set(
+    new Uint8Array(thumbnailEncrypted.ciphertext),
+    thumbnailEncrypted.iv.byteLength,
+  );
+
+  const chunkHash = encodeToBase64(await digestMessage(ivAndCiphertext));
+
+  const response = await fetch(`/api/upload/${uploadId}/chunks/0`, {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/octet-stream",
+      "Content-Digest": `sha-256=:${chunkHash}:`,
+    },
+    body: ivAndCiphertext,
+  });
+
+  if (!response.ok) {
+    throw new Error(`Thumbnail upload failed: ${response.status} ${response.statusText}`);
+  }
+
+  await trpc().upload.completeFileThumbnailUpload.mutate({ uploadId });
+};
+
+const requestImageFileUpload = limitFunction(
+  async (
+    state: FileUploadState,
+    metadata: RouterInputs["upload"]["startFileUpload"],
+    chunksEncrypted: { chunkEncrypted: ArrayBuffer; chunkEncryptedHash: string }[],
+    fileSigned: string | undefined,
+    thumbnailData: { ciphertext: ArrayBuffer; iv: ArrayBuffer; plaintext: ArrayBuffer } | null,
+    dataKeyVersion: Date,
+  ) => {
+    state.status = "uploading";
+
+    const { uploadId } = await trpc().upload.startFileUpload.mutate(metadata);
+
+    const totalBytes = chunksEncrypted.reduce((sum, c) => sum + c.chunkEncrypted.byteLength, 0);
+    let uploadedBytes = 0;
+    const startTime = Date.now();
+
+    for (let i = 0; i < chunksEncrypted.length; i++) {
+      const { chunkEncrypted, chunkEncryptedHash } = chunksEncrypted[i]!;
+
+      const response = await fetch(`/api/upload/${uploadId}/chunks/${i}`, {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/octet-stream",
+          "Content-Digest": `sha-256=:${chunkEncryptedHash}:`,
+        },
+        body: chunkEncrypted,
+      });
+
+      if (!response.ok) {
+        throw new Error(`Chunk upload failed: ${response.status} ${response.statusText}`);
+      }
+
+      uploadedBytes += chunkEncrypted.byteLength;
+
+      const elapsed = (Date.now() - startTime) / 1000;
+      const rate = uploadedBytes / elapsed;
+      const remaining = totalBytes - uploadedBytes;
+      const estimated = rate > 0 ? remaining / rate : undefined;
+
+      state.progress = uploadedBytes / totalBytes;
+      state.rate = rate;
+      state.estimated = estimated;
+    }
+
+    const { file: fileId } = await trpc().upload.completeFileUpload.mutate({
+      uploadId,
+      contentHmac: fileSigned,
+    });
+
+    if (thumbnailData) {
+      try {
+        await uploadThumbnail(fileId, thumbnailData, dataKeyVersion);
+      } catch (e) {
+        // TODO: Error handling for thumbnail upload
+        console.error(e);
+      }
+    }
+
+    state.status = "uploaded";
+
+    return { fileId, thumbnailBuffer: thumbnailData?.plaintext };
+  },
+  { concurrency: 1 },
+);
+
+const requestFileUpload = async (
+  state: FileUploadState,
+  file: File,
+  masterKey: MasterKey,
+  hmacSecret: HmacSecret,
+  fileSigned: string,
+  parentId: DirectoryId,
+) => {
+  state.status = "uploading";
+
+  const fileType = getFileType(file);
+  const { dataKey, dataKeyVersion } = await generateDataKey();
+  const dataKeyWrapped = await wrapDataKey(dataKey, masterKey.key);
+
+  const nameEncrypted = await encryptString(file.name, dataKey);
+  const lastModifiedAtEncrypted = await encryptString(file.lastModified.toString(), dataKey);
+
+  const totalChunks = Math.ceil(file.size / CHUNK_SIZE);
+  const metadata = {
+    chunks: totalChunks,
+    parent: parentId,
+    mekVersion: masterKey.version,
+    dek: dataKeyWrapped,
+    dekVersion: dataKeyVersion,
+    hskVersion: hmacSecret.version,
+    contentType: fileType,
+    name: nameEncrypted.ciphertext,
+    nameIv: nameEncrypted.iv,
+    lastModifiedAt: lastModifiedAtEncrypted.ciphertext,
+    lastModifiedAtIv: lastModifiedAtEncrypted.iv,
+  };
+
+  const { uploadId } = await trpc().upload.startFileUpload.mutate(metadata);
+
+  const reader = file.stream().getReader();
+  const limit = pLimit(4);
+  let buffer = new Uint8Array(0);
+  let chunkIndex = 0;
+  const uploadPromises: Promise<void>[] = [];
+
+  const totalBytes = file.size;
+  let uploadedBytes = 0;
+  const startTime = Date.now();
+
+  const uploadChunk = async (
+    index: number,
+    encryptedChunk: ArrayBuffer,
+    chunkHash: string,
+    originalChunkSize: number,
+  ) => {
+    const response = await fetch(`/api/upload/${uploadId}/chunks/${index}`, {
+      method: "POST",
+      headers: {
+        "Content-Type": "application/octet-stream",
+        "Content-Digest": `sha-256=:${chunkHash}:`,
+      },
+      body: encryptedChunk,
+    });
+
+    if (!response.ok) {
+      throw new Error(`Chunk upload failed: ${response.status} ${response.statusText}`);
+    }
+
+    uploadedBytes += originalChunkSize;
+    const elapsed = (Date.now() - startTime) / 1000;
+    const rate = uploadedBytes / elapsed;
+    const remaining = totalBytes - uploadedBytes;
+    const estimated = rate > 0 ? remaining / rate : undefined;
+
+    state.progress = uploadedBytes / totalBytes;
+    state.rate = rate;
+    state.estimated = estimated;
+  };
+
+  while (true) {
+    const { done, value } = await reader.read();
+    if (done && buffer.length === 0) break;
+
+    if (value) {
+      const newBuffer = new Uint8Array(buffer.length + value.length);
+      newBuffer.set(buffer);
+      newBuffer.set(value, buffer.length);
+      buffer = newBuffer;
+    }
+
+    while (buffer.length >= CHUNK_SIZE || (done && buffer.length > 0)) {
+      const chunkSize = Math.min(CHUNK_SIZE, buffer.length);
+      const chunk = buffer.slice(0, chunkSize);
+      buffer = buffer.slice(chunkSize);
+
+      const encryptedChunk = await encryptChunk(chunk.buffer.slice(0, chunk.byteLength), dataKey);
+      const chunkHash = encodeToBase64(await digestMessage(encryptedChunk));
+      const currentIndex = chunkIndex++;
+
+      uploadPromises.push(
+        limit(() => uploadChunk(currentIndex, encryptedChunk, chunkHash, chunkSize)),
+      );
+    }
+
+    if (done) break;
+  }
+
+  await Promise.all(uploadPromises);
+
+  const { file: fileId } = await trpc().upload.completeFileUpload.mutate({
+    uploadId,
+    contentHmac: fileSigned,
+  });
+
+  if (fileType.startsWith("video/")) {
+    try {
+      const thumbnail = await generateThumbnailFromFile(file);
+      if (thumbnail) {
+        const thumbnailBuffer = await thumbnail.arrayBuffer();
+        const thumbnailEncrypted = await encryptData(thumbnailBuffer, dataKey);
+
+        await uploadThumbnail(fileId, thumbnailEncrypted, dataKeyVersion);
+      }
+    } catch (e) {
+      // Thumbnail upload failure is not critical
+      console.error(e);
+    }
+  }
+
+  state.status = "uploaded";
+
+  return { fileId };
+};
+
+export const uploadFile = async (
+  file: File,
+  parentId: "root" | number,
+  hmacSecret: HmacSecret,
+  masterKey: MasterKey,
+  onDuplicate: () => Promise<boolean>,
+) => {
+  uploadingFiles.push({
+    name: file.name,
+    parentId,
+    status: "queued",
+  });
+  const state = uploadingFiles.at(-1)!;
+
+  return await scheduler.schedule(file.size, async () => {
+    state.status = "encryption-pending";
+
+    try {
+      const { fileSigned } = await requestDuplicateFileScan(file, hmacSecret, onDuplicate);
+      if (!fileSigned) {
+        state.status = "canceled";
+        uploadingFiles = uploadingFiles.filter((file) => file !== state);
+        return;
+      }
+
+      const fileType = getFileType(file);
+      if (fileType.startsWith("image/")) {
+        const fileBuffer = await file.arrayBuffer();
+        const {
+          dataKeyWrapped,
+          dataKeyVersion,
+          chunksEncrypted,
+          nameEncrypted,
+          createdAtEncrypted,
+          lastModifiedAtEncrypted,
+          thumbnail,
+        } = await encryptImageFile(state, file, masterKey);
+
+        const metadata = {
+          chunks: chunksEncrypted.length,
+          parent: parentId,
+          mekVersion: masterKey.version,
+          dek: dataKeyWrapped,
+          dekVersion: dataKeyVersion,
+          hskVersion: hmacSecret.version,
+          contentType: fileType,
+          name: nameEncrypted.ciphertext,
+          nameIv: nameEncrypted.iv,
+          createdAt: createdAtEncrypted?.ciphertext,
+          createdAtIv: createdAtEncrypted?.iv,
+          lastModifiedAt: lastModifiedAtEncrypted.ciphertext,
+          lastModifiedAtIv: lastModifiedAtEncrypted.iv,
+        };
+
+        const { fileId, thumbnailBuffer } = await requestImageFileUpload(
+          state,
+          metadata,
+          chunksEncrypted,
+          fileSigned,
+          thumbnail ?? null,
+          dataKeyVersion,
+        );
+        return { fileId, fileBuffer, thumbnailBuffer };
+      } else {
+        const { fileId } = await requestFileUpload(
+          state,
+          file,
+          masterKey,
+          hmacSecret,
+          fileSigned,
+          parentId,
+        );
+        return { fileId };
+      }
+    } catch (e) {
+      state.status = "error";
+      throw e;
+    }
+  });
+};

src/lib/modules/file/upload.ts

@@ -1,235 +0,0 @@
-import axios from "axios";
-import ExifReader from "exifreader";
-import { limitFunction } from "p-limit";
-import { writable, type Writable } from "svelte/store";
-import {
-  encodeToBase64,
-  generateDataKey,
-  wrapDataKey,
-  encryptData,
-  encryptString,
-  digestMessage,
-  signMessageHmac,
-} from "$lib/modules/crypto";
-import type {
-  DuplicateFileScanRequest,
-  DuplicateFileScanResponse,
-  FileUploadRequest,
-  FileUploadResponse,
-} from "$lib/server/schemas";
-import {
-  fileUploadStatusStore,
-  type MasterKey,
-  type HmacSecret,
-  type FileUploadStatus,
-} from "$lib/stores";
-
-const requestDuplicateFileScan = limitFunction(
-  async (file: File, hmacSecret: HmacSecret, onDuplicate: () => Promise<boolean>) => {
-    const fileBuffer = await file.arrayBuffer();
-    const fileSigned = encodeToBase64(await signMessageHmac(fileBuffer, hmacSecret.secret));
-
-    const res = await axios.post("/api/file/scanDuplicates", {
-      hskVersion: hmacSecret.version,
-      contentHmac: fileSigned,
-    } satisfies DuplicateFileScanRequest);
-    const { files }: DuplicateFileScanResponse = res.data;
-
-    if (files.length === 0 || (await onDuplicate())) {
-      return { fileBuffer, fileSigned };
-    } else {
-      return {};
-    }
-  },
-  { concurrency: 1 },
-);
-
-const getFileType = (file: File) => {
-  if (file.type) return file.type;
-  if (file.name.endsWith(".heic")) return "image/heic";
-  throw new Error("Unknown file type");
-};
-
-const extractExifDateTime = (fileBuffer: ArrayBuffer) => {
-  const exif = ExifReader.load(fileBuffer);
-  const dateTimeOriginal = exif["DateTimeOriginal"]?.description;
-  const offsetTimeOriginal = exif["OffsetTimeOriginal"]?.description;
-  if (!dateTimeOriginal) return undefined;
-
-  const [date, time] = dateTimeOriginal.split(" ");
-  if (!date || !time) return undefined;
-
-  const [year, month, day] = date.split(":").map(Number);
-  const [hour, minute, second] = time.split(":").map(Number);
-  if (!year || !month || !day || !hour || !minute || !second) return undefined;
-
-  if (!offsetTimeOriginal) {
-    // No timezone information.. Assume local timezone
-    return new Date(year, month - 1, day, hour, minute, second);
-  }
-
-  const offsetSign = offsetTimeOriginal[0] === "+" ? 1 : -1;
-  const [offsetHour, offsetMinute] = offsetTimeOriginal.slice(1).split(":").map(Number);
-
-  const utcDate = Date.UTC(year, month - 1, day, hour, minute, second);
-  const offsetMs = offsetSign * ((offsetHour ?? 0) * 60 + (offsetMinute ?? 0)) * 60 * 1000;
-  return new Date(utcDate - offsetMs);
-};
-
-const encryptFile = limitFunction(
-  async (
-    status: Writable<FileUploadStatus>,
-    file: File,
-    fileBuffer: ArrayBuffer,
-    masterKey: MasterKey,
-  ) => {
-    status.update((value) => {
-      value.status = "encrypting";
-      return value;
-    });
-
-    const fileType = getFileType(file);
-
-    let createdAt;
-    if (fileType.startsWith("image/")) {
-      createdAt = extractExifDateTime(fileBuffer);
-    }
-
-    const { dataKey, dataKeyVersion } = await generateDataKey();
-    const dataKeyWrapped = await wrapDataKey(dataKey, masterKey.key);
-
-    const fileEncrypted = await encryptData(fileBuffer, dataKey);
-    const fileEncryptedHash = encodeToBase64(await digestMessage(fileEncrypted.ciphertext));
-
-    const nameEncrypted = await encryptString(file.name, dataKey);
-    const createdAtEncrypted =
-      createdAt && (await encryptString(createdAt.getTime().toString(), dataKey));
-    const lastModifiedAtEncrypted = await encryptString(file.lastModified.toString(), dataKey);
-
-    status.update((value) => {
-      value.status = "upload-pending";
-      return value;
-    });
-
-    return {
-      dataKeyWrapped,
-      dataKeyVersion,
-      fileType,
-      fileEncrypted,
-      fileEncryptedHash,
-      nameEncrypted,
-      createdAtEncrypted,
-      lastModifiedAtEncrypted,
-    };
-  },
-  { concurrency: 4 },
-);
-
-const requestFileUpload = limitFunction(
-  async (status: Writable<FileUploadStatus>, form: FormData) => {
-    status.update((value) => {
-      value.status = "uploading";
-      return value;
-    });
-
-    const res = await axios.post("/api/file/upload", form, {
-      onUploadProgress: ({ progress, rate, estimated }) => {
-        status.update((value) => {
-          value.progress = progress;
-          value.rate = rate;
-          value.estimated = estimated;
-          return value;
-        });
-      },
-    });
-    const { file }: FileUploadResponse = res.data;
-
-    status.update((value) => {
-      value.status = "uploaded";
-      return value;
-    });
-
-    return { fileId: file };
-  },
-  { concurrency: 1 },
-);
-
-export const uploadFile = async (
-  file: File,
-  parentId: "root" | number,
-  hmacSecret: HmacSecret,
-  masterKey: MasterKey,
-  onDuplicate: () => Promise<boolean>,
-): Promise<{ fileId: number; fileBuffer: ArrayBuffer } | undefined> => {
-  const status = writable<FileUploadStatus>({
-    name: file.name,
-    parentId,
-    status: "encryption-pending",
-  });
-  fileUploadStatusStore.update((value) => {
-    value.push(status);
-    return value;
-  });
-
-  try {
-    const { fileBuffer, fileSigned } = await requestDuplicateFileScan(
-      file,
-      hmacSecret,
-      onDuplicate,
-    );
-    if (!fileBuffer || !fileSigned) {
-      status.update((value) => {
-        value.status = "canceled";
-        return value;
-      });
-      fileUploadStatusStore.update((value) => {
-        value = value.filter((v) => v !== status);
-        return value;
-      });
-      return undefined;
-    }
-
-    const {
-      dataKeyWrapped,
-      dataKeyVersion,
-      fileType,
-      fileEncrypted,
-      fileEncryptedHash,
-      nameEncrypted,
-      createdAtEncrypted,
-      lastModifiedAtEncrypted,
-    } = await encryptFile(status, file, fileBuffer, masterKey);
-
-    const form = new FormData();
-    form.set(
-      "metadata",
-      JSON.stringify({
-        parent: parentId,
-        mekVersion: masterKey.version,
-        dek: dataKeyWrapped,
-        dekVersion: dataKeyVersion.toISOString(),
-        hskVersion: hmacSecret.version,
-        contentHmac: fileSigned,
-        contentType: fileType,
-        contentIv: fileEncrypted.iv,
-        name: nameEncrypted.ciphertext,
-        nameIv: nameEncrypted.iv,
-        createdAt: createdAtEncrypted?.ciphertext,
-        createdAtIv: createdAtEncrypted?.iv,
-        lastModifiedAt: lastModifiedAtEncrypted.ciphertext,
-        lastModifiedAtIv: lastModifiedAtEncrypted.iv,
-      } as FileUploadRequest),
-    );
-    form.set("content", new Blob([fileEncrypted.ciphertext]));
-    form.set("checksum", fileEncryptedHash);
-
-    const { fileId } = await requestFileUpload(status, form);
-    return { fileId, fileBuffer };
-  } catch (e) {
-    status.update((value) => {
-      value.status = "error";
-      return value;
-    });
-    throw e;
-  }
-};

src/lib/modules/filesystem.ts

@@ -1,329 +0,0 @@
-import { get, writable, type Writable } from "svelte/store";
-import { callGetApi } from "$lib/hooks";
-import {
-  getDirectoryInfos as getDirectoryInfosFromIndexedDB,
-  getDirectoryInfo as getDirectoryInfoFromIndexedDB,
-  storeDirectoryInfo,
-  deleteDirectoryInfo,
-  getFileInfos as getFileInfosFromIndexedDB,
-  getFileInfo as getFileInfoFromIndexedDB,
-  storeFileInfo,
-  deleteFileInfo,
-  getCategoryInfos as getCategoryInfosFromIndexedDB,
-  getCategoryInfo as getCategoryInfoFromIndexedDB,
-  storeCategoryInfo,
-  deleteCategoryInfo,
-  type DirectoryId,
-  type CategoryId,
-} from "$lib/indexedDB";
-import { unwrapDataKey, decryptString } from "$lib/modules/crypto";
-import type {
-  CategoryInfoResponse,
-  CategoryFileListResponse,
-  DirectoryInfoResponse,
-  FileInfoResponse,
-} from "$lib/server/schemas";
-
-export type DirectoryInfo =
-  | {
-      id: "root";
-      dataKey?: undefined;
-      dataKeyVersion?: undefined;
-      name?: undefined;
-      subDirectoryIds: number[];
-      fileIds: number[];
-    }
-  | {
-      id: number;
-      dataKey?: CryptoKey;
-      dataKeyVersion?: Date;
-      name: string;
-      subDirectoryIds: number[];
-      fileIds: number[];
-    };
-
-export interface FileInfo {
-  id: number;
-  dataKey?: CryptoKey;
-  dataKeyVersion?: Date;
-  contentType: string;
-  contentIv?: string;
-  name: string;
-  createdAt?: Date;
-  lastModifiedAt: Date;
-  categoryIds: number[];
-}
-
-export type CategoryInfo =
-  | {
-      id: "root";
-      dataKey?: undefined;
-      dataKeyVersion?: undefined;
-      name?: undefined;
-      subCategoryIds: number[];
-      files?: undefined;
-    }
-  | {
-      id: number;
-      dataKey?: CryptoKey;
-      dataKeyVersion?: Date;
-      name: string;
-      subCategoryIds: number[];
-      files: { id: number; isRecursive: boolean }[];
-    };
-
-const directoryInfoStore = new Map<DirectoryId, Writable<DirectoryInfo | null>>();
-const fileInfoStore = new Map<number, Writable<FileInfo | null>>();
-const categoryInfoStore = new Map<CategoryId, Writable<CategoryInfo | null>>();
-
-const fetchDirectoryInfoFromIndexedDB = async (
-  id: DirectoryId,
-  info: Writable<DirectoryInfo | null>,
-) => {
-  if (get(info)) return;
-
-  const [directory, subDirectories, files] = await Promise.all([
-    id !== "root" ? getDirectoryInfoFromIndexedDB(id) : undefined,
-    getDirectoryInfosFromIndexedDB(id),
-    getFileInfosFromIndexedDB(id),
-  ]);
-  const subDirectoryIds = subDirectories.map(({ id }) => id);
-  const fileIds = files.map(({ id }) => id);
-
-  if (id === "root") {
-    info.set({ id, subDirectoryIds, fileIds });
-  } else {
-    if (!directory) return;
-    info.set({ id, name: directory.name, subDirectoryIds, fileIds });
-  }
-};
-
-const fetchDirectoryInfoFromServer = async (
-  id: DirectoryId,
-  info: Writable<DirectoryInfo | null>,
-  masterKey: CryptoKey,
-) => {
-  const res = await callGetApi(`/api/directory/${id}`);
-  if (res.status === 404) {
-    info.set(null);
-    await deleteDirectoryInfo(id as number);
-    return;
-  } else if (!res.ok) {
-    throw new Error("Failed to fetch directory information");
-  }
-
-  const {
-    metadata,
-    subDirectories: subDirectoryIds,
-    files: fileIds,
-  }: DirectoryInfoResponse = await res.json();
-
-  if (id === "root") {
-    info.set({ id, subDirectoryIds, fileIds });
-  } else {
-    const { dataKey } = await unwrapDataKey(metadata!.dek, masterKey);
-    const name = await decryptString(metadata!.name, metadata!.nameIv, dataKey);
-
-    info.set({
-      id,
-      dataKey,
-      dataKeyVersion: new Date(metadata!.dekVersion),
-      name,
-      subDirectoryIds,
-      fileIds,
-    });
-    await storeDirectoryInfo({ id, parentId: metadata!.parent, name });
-  }
-};
-
-const fetchDirectoryInfo = async (
-  id: DirectoryId,
-  info: Writable<DirectoryInfo | null>,
-  masterKey: CryptoKey,
-) => {
-  await fetchDirectoryInfoFromIndexedDB(id, info);
-  await fetchDirectoryInfoFromServer(id, info, masterKey);
-};
-
-export const getDirectoryInfo = (id: DirectoryId, masterKey: CryptoKey) => {
-  // TODO: MEK rotation
-
-  let info = directoryInfoStore.get(id);
-  if (!info) {
-    info = writable(null);
-    directoryInfoStore.set(id, info);
-  }
-
-  fetchDirectoryInfo(id, info, masterKey); // Intended
-  return info;
-};
-
-const fetchFileInfoFromIndexedDB = async (id: number, info: Writable<FileInfo | null>) => {
-  if (get(info)) return;
-
-  const file = await getFileInfoFromIndexedDB(id);
-  if (!file) return;
-
-  info.set(file);
-};
-
-const decryptDate = async (ciphertext: string, iv: string, dataKey: CryptoKey) => {
-  return new Date(parseInt(await decryptString(ciphertext, iv, dataKey), 10));
-};
-
-const fetchFileInfoFromServer = async (
-  id: number,
-  info: Writable<FileInfo | null>,
-  masterKey: CryptoKey,
-) => {
-  const res = await callGetApi(`/api/file/${id}`);
-  if (res.status === 404) {
-    info.set(null);
-    await deleteFileInfo(id);
-    return;
-  } else if (!res.ok) {
-    throw new Error("Failed to fetch file information");
-  }
-
-  const metadata: FileInfoResponse = await res.json();
-  const { dataKey } = await unwrapDataKey(metadata.dek, masterKey);
-
-  const name = await decryptString(metadata.name, metadata.nameIv, dataKey);
-  const createdAt =
-    metadata.createdAt && metadata.createdAtIv
-      ? await decryptDate(metadata.createdAt, metadata.createdAtIv, dataKey)
-      : undefined;
-  const lastModifiedAt = await decryptDate(
-    metadata.lastModifiedAt,
-    metadata.lastModifiedAtIv,
-    dataKey,
-  );
-
-  info.set({
-    id,
-    dataKey,
-    dataKeyVersion: new Date(metadata.dekVersion),
-    contentType: metadata.contentType,
-    contentIv: metadata.contentIv,
-    name,
-    createdAt,
-    lastModifiedAt,
-    categoryIds: metadata.categories,
-  });
-  await storeFileInfo({
-    id,
-    parentId: metadata.parent,
-    name,
-    contentType: metadata.contentType,
-    createdAt,
-    lastModifiedAt,
-    categoryIds: metadata.categories,
-  });
-};
-
-const fetchFileInfo = async (id: number, info: Writable<FileInfo | null>, masterKey: CryptoKey) => {
-  await fetchFileInfoFromIndexedDB(id, info);
-  await fetchFileInfoFromServer(id, info, masterKey);
-};
-
-export const getFileInfo = (fileId: number, masterKey: CryptoKey) => {
-  // TODO: MEK rotation
-
-  let info = fileInfoStore.get(fileId);
-  if (!info) {
-    info = writable(null);
-    fileInfoStore.set(fileId, info);
-  }
-
-  fetchFileInfo(fileId, info, masterKey); // Intended
-  return info;
-};
-
-const fetchCategoryInfoFromIndexedDB = async (
-  id: CategoryId,
-  info: Writable<CategoryInfo | null>,
-) => {
-  if (get(info)) return;
-
-  const [category, subCategories] = await Promise.all([
-    id !== "root" ? getCategoryInfoFromIndexedDB(id) : undefined,
-    getCategoryInfosFromIndexedDB(id),
-  ]);
-  const subCategoryIds = subCategories.map(({ id }) => id);
-
-  if (id === "root") {
-    info.set({ id, subCategoryIds });
-  } else {
-    if (!category) return;
-    info.set({ id, name: category.name, subCategoryIds, files: category.files });
-  }
-};
-
-const fetchCategoryInfoFromServer = async (
-  id: CategoryId,
-  info: Writable<CategoryInfo | null>,
-  masterKey: CryptoKey,
-) => {
-  let res = await callGetApi(`/api/category/${id}`);
-  if (res.status === 404) {
-    info.set(null);
-    await deleteCategoryInfo(id as number);
-    return;
-  } else if (!res.ok) {
-    throw new Error("Failed to fetch category information");
-  }
-
-  const { metadata, subCategories }: CategoryInfoResponse = await res.json();
-
-  if (id === "root") {
-    info.set({ id, subCategoryIds: subCategories });
-  } else {
-    const { dataKey } = await unwrapDataKey(metadata!.dek, masterKey);
-    const name = await decryptString(metadata!.name, metadata!.nameIv, dataKey);
-
-    res = await callGetApi(`/api/category/${id}/file/list?recurse=true`);
-    if (!res.ok) {
-      throw new Error("Failed to fetch category files");
-    }
-
-    const { files }: CategoryFileListResponse = await res.json();
-    const filesMapped = files.map(({ file, isRecursive }) => ({ id: file, isRecursive }));
-
-    info.set({
-      id,
-      dataKey,
-      dataKeyVersion: new Date(metadata!.dekVersion),
-      name,
-      subCategoryIds: subCategories,
-      files: filesMapped,
-    });
-    await storeCategoryInfo({
-      id,
-      parentId: metadata!.parent,
-      name,
-      files: filesMapped,
-    });
-  }
-};
-
-const fetchCategoryInfo = async (
-  id: CategoryId,
-  info: Writable<CategoryInfo | null>,
-  masterKey: CryptoKey,
-) => {
-  await fetchCategoryInfoFromIndexedDB(id, info);
-  await fetchCategoryInfoFromServer(id, info, masterKey);
-};
-
-export const getCategoryInfo = (categoryId: CategoryId, masterKey: CryptoKey) => {
-  // TODO: MEK rotation
-
-  let info = categoryInfoStore.get(categoryId);
-  if (!info) {
-    info = writable(null);
-    categoryInfoStore.set(categoryId, info);
-  }
-
-  fetchCategoryInfo(categoryId, info, masterKey); // Intended
-  return info;
-};

src/lib/modules/filesystem/category.ts

@@ -0,0 +1,121 @@
+import * as IndexedDB from "$lib/indexedDB";
+import { trpc, isTRPCClientError } from "$trpc/client";
+import { FilesystemCache, decryptFileMetadata, decryptCategoryMetadata } from "./internal.svelte";
+import type { CategoryInfo, MaybeCategoryInfo } from "./types";
+
+const cache = new FilesystemCache<CategoryId, MaybeCategoryInfo>({
+  async fetchFromIndexedDB(id) {
+    const [category, subCategories] = await Promise.all([
+      id !== "root" ? IndexedDB.getCategoryInfo(id) : undefined,
+      IndexedDB.getCategoryInfos(id),
+    ]);
+    const files = category?.files
+      ? await Promise.all(
+          category.files.map(async (file) => {
+            const fileInfo = await IndexedDB.getFileInfo(file.id);
+            return fileInfo
+              ? {
+                  id: file.id,
+                  parentId: fileInfo.parentId,
+                  contentType: fileInfo.contentType,
+                  name: fileInfo.name,
+                  createdAt: fileInfo.createdAt,
+                  lastModifiedAt: fileInfo.lastModifiedAt,
+                  isRecursive: file.isRecursive,
+                }
+              : undefined;
+          }),
+        )
+      : undefined;
+
+    if (id === "root") {
+      return {
+        id,
+        exists: true,
+        subCategories,
+      };
+    } else if (category) {
+      return {
+        id,
+        exists: true,
+        parentId: category.parentId,
+        name: category.name,
+        subCategories,
+        files: files?.filter((file) => !!file) ?? [],
+        isFileRecursive: category.isFileRecursive ?? false,
+      };
+    }
+  },
+
+  async fetchFromServer(id, cachedInfo, masterKey) {
+    try {
+      const category = await trpc().category.get.query({ id, recurse: true });
+      const [subCategories, files, metadata] = await Promise.all([
+        Promise.all(
+          category.subCategories.map(async (category) => ({
+            id: category.id,
+            parentId: id,
+            ...(await decryptCategoryMetadata(category, masterKey)),
+          })),
+        ),
+        category.files &&
+          Promise.all(
+            category.files.map(async (file) => ({
+              id: file.id,
+              parentId: file.parent,
+              contentType: file.contentType,
+              isRecursive: file.isRecursive,
+              ...(await decryptFileMetadata(file, masterKey)),
+            })),
+          ),
+        category.metadata && decryptCategoryMetadata(category.metadata, masterKey),
+      ]);
+
+      return storeToIndexedDB(
+        id !== "root"
+          ? {
+              id,
+              parentId: category.metadata!.parent,
+              subCategories,
+              files: files!,
+              isFileRecursive: cachedInfo?.isFileRecursive ?? false,
+              ...metadata!,
+            }
+          : { id, subCategories },
+      );
+    } catch (e) {
+      if (isTRPCClientError(e) && e.data?.code === "NOT_FOUND") {
+        await IndexedDB.deleteCategoryInfo(id as number);
+        return { id, exists: false };
+      }
+      throw e;
+    }
+  },
+});
+
+const storeToIndexedDB = (info: CategoryInfo) => {
+  if (info.id !== "root") {
+    void IndexedDB.storeCategoryInfo(info);
+
+    // TODO: Bulk Upsert
+    new Map(info.files.map((file) => [file.id, file])).forEach((file) => {
+      void IndexedDB.storeFileInfo(file);
+    });
+  }
+
+  // TODO: Bulk Upsert
+  info.subCategories.forEach((category) => {
+    void IndexedDB.storeCategoryInfo(category);
+  });
+
+  void IndexedDB.deleteDanglingCategoryInfos(
+    info.id,
+    new Set(info.subCategories.map(({ id }) => id)),
+  );
+
+  return { ...info, exists: true as const };
+};
+
+export const getCategoryInfo = (id: CategoryId, masterKey: CryptoKey) => {
+  return cache.get(id, masterKey);
+};

src/lib/modules/filesystem/directory.ts

@@ -0,0 +1,102 @@
+import * as IndexedDB from "$lib/indexedDB";
+import { trpc, isTRPCClientError } from "$trpc/client";
+import { FilesystemCache, decryptDirectoryMetadata, decryptFileMetadata } from "./internal.svelte";
+import type { DirectoryInfo, MaybeDirectoryInfo } from "./types";
+
+const cache = new FilesystemCache<DirectoryId, MaybeDirectoryInfo>({
+  async fetchFromIndexedDB(id) {
+    const [directory, subDirectories, files] = await Promise.all([
+      id !== "root" ? IndexedDB.getDirectoryInfo(id) : undefined,
+      IndexedDB.getDirectoryInfos(id),
+      IndexedDB.getFileInfos(id),
+    ]);
+
+    if (id === "root") {
+      return {
+        id,
+        exists: true,
+        subDirectories,
+        files,
+      };
+    } else if (directory) {
+      return {
+        id,
+        exists: true,
+        parentId: directory.parentId,
+        name: directory.name,
+        subDirectories,
+        files,
+      };
+    }
+  },
+
+  async fetchFromServer(id, _cachedInfo, masterKey) {
+    try {
+      const directory = await trpc().directory.get.query({ id });
+      const [subDirectories, files, metadata] = await Promise.all([
+        Promise.all(
+          directory.subDirectories.map(async (directory) => ({
+            id: directory.id,
+            parentId: id,
+            ...(await decryptDirectoryMetadata(directory, masterKey)),
+          })),
+        ),
+        Promise.all(
+          directory.files.map(async (file) => ({
+            id: file.id,
+            parentId: id,
+            contentType: file.contentType,
+            ...(await decryptFileMetadata(file, masterKey)),
+          })),
+        ),
+        directory.metadata && decryptDirectoryMetadata(directory.metadata, masterKey),
+      ]);
+
+      return storeToIndexedDB(
+        id !== "root"
+          ? {
+              id,
+              parentId: directory.metadata!.parent,
+              subDirectories,
+              files,
+              ...metadata!,
+            }
+          : { id, subDirectories, files },
+      );
+    } catch (e) {
+      if (isTRPCClientError(e) && e.data?.code === "NOT_FOUND") {
+        await IndexedDB.deleteDirectoryInfo(id as number);
+        return { id, exists: false as const };
+      }
+      throw e;
+    }
+  },
+});
+
+const storeToIndexedDB = (info: DirectoryInfo) => {
+  if (info.id !== "root") {
+    void IndexedDB.storeDirectoryInfo(info);
+  }
+
+  // TODO: Bulk Upsert
+  info.subDirectories.forEach((subDirectory) => {
+    void IndexedDB.storeDirectoryInfo(subDirectory);
+  });
+
+  // TODO: Bulk Upsert
+  info.files.forEach((file) => {
+    void IndexedDB.storeFileInfo(file);
+  });
+
+  void IndexedDB.deleteDanglingDirectoryInfos(
+    info.id,
+    new Set(info.subDirectories.map(({ id }) => id)),
+  );
+  void IndexedDB.deleteDanglingFileInfos(info.id, new Set(info.files.map(({ id }) => id)));
+
+  return { ...info, exists: true as const };
+};
+
+export const getDirectoryInfo = (id: DirectoryId, masterKey: CryptoKey) => {
+  return cache.get(id, masterKey);
+};

src/lib/modules/filesystem/file.ts

@@ -0,0 +1,177 @@
+import * as IndexedDB from "$lib/indexedDB";
+import { trpc, isTRPCClientError } from "$trpc/client";
+import { FilesystemCache, decryptFileMetadata, decryptCategoryMetadata } from "./internal.svelte";
+import type { FileInfo, MaybeFileInfo } from "./types";
+
+const cache = new FilesystemCache<number, MaybeFileInfo>({
+  async fetchFromIndexedDB(id) {
+    const file = await IndexedDB.getFileInfo(id);
+    const categories = file?.categoryIds
+      ? await Promise.all(
+          file.categoryIds.map(async (categoryId) => {
+            const category = await IndexedDB.getCategoryInfo(categoryId);
+            return category
+              ? { id: category.id, parentId: category.parentId, name: category.name }
+              : undefined;
+          }),
+        )
+      : undefined;
+
+    if (file) {
+      return {
+        id,
+        exists: true,
+        parentId: file.parentId,
+        contentType: file.contentType,
+        name: file.name,
+        createdAt: file.createdAt,
+        lastModifiedAt: file.lastModifiedAt,
+        categories: categories?.filter((category) => !!category) ?? [],
+      };
+    }
+  },
+
+  async fetchFromServer(id, _cachedInfo, masterKey) {
+    try {
+      const file = await trpc().file.get.query({ id });
+      const [categories, metadata] = await Promise.all([
+        Promise.all(
+          file.categories.map(async (category) => ({
+            id: category.id,
+            parentId: category.parent,
+            ...(await decryptCategoryMetadata(category, masterKey)),
+          })),
+        ),
+        decryptFileMetadata(file, masterKey),
+      ]);
+
+      return storeToIndexedDB({
+        id,
+        isLegacy: file.isLegacy,
+        parentId: file.parent,
+        dataKey: metadata.dataKey,
+        contentType: file.contentType,
+        name: metadata.name,
+        createdAt: metadata.createdAt,
+        lastModifiedAt: metadata.lastModifiedAt,
+        categories,
+      });
+    } catch (e) {
+      if (isTRPCClientError(e) && e.data?.code === "NOT_FOUND") {
+        await IndexedDB.deleteFileInfo(id);
+        return { id, exists: false as const };
+      }
+      throw e;
+    }
+  },
+
+  async bulkFetchFromIndexedDB(ids) {
+    const files = await IndexedDB.bulkGetFileInfos([...ids]);
+    const categories = await Promise.all(
+      files.map(async (file) =>
+        file?.categoryIds
+          ? await Promise.all(
+              file.categoryIds.map(async (categoryId) => {
+                const category = await IndexedDB.getCategoryInfo(categoryId);
+                return category
+                  ? { id: category.id, parentId: category.parentId, name: category.name }
+                  : undefined;
+              }),
+            )
+          : undefined,
+      ),
+    );
+
+    return new Map(
+      files
+        .filter((file) => !!file)
+        .map((file, index) => [
+          file.id,
+          {
+            ...file,
+            exists: true,
+            categories: categories[index]?.filter((category) => !!category) ?? [],
+          },
+        ]),
+    );
+  },
+
+  async bulkFetchFromServer(ids, masterKey) {
+    const idsArray = [...ids.keys()];
+
+    const filesRaw = await trpc().file.bulkGet.query({ ids: idsArray });
+    const files = await Promise.all(
+      filesRaw.map(async ({ id, categories: categoriesRaw, ...metadataRaw }) => {
+        const [categories, metadata] = await Promise.all([
+          Promise.all(
+            categoriesRaw.map(async (category) => ({
+              id: category.id,
+              parentId: category.parent,
+              ...(await decryptCategoryMetadata(category, masterKey)),
+            })),
+          ),
+          decryptFileMetadata(metadataRaw, masterKey),
+        ]);
+
+        return {
+          id,
+          exists: true as const,
+          isLegacy: metadataRaw.isLegacy,
+          parentId: metadataRaw.parent,
+          contentType: metadataRaw.contentType,
+          categories,
+          ...metadata,
+        };
+      }),
+    );
+
+    const existingIds = new Set(filesRaw.map(({ id }) => id));
+    const deletedIds = idsArray.filter((id) => !existingIds.has(id));
+
+    void IndexedDB.bulkDeleteFileInfos(deletedIds);
+    return new Map<number, MaybeFileInfo>([
+      ...bulkStoreToIndexedDB(files),
+      ...deletedIds.map((id) => [id, { id, exists: false }] as const),
+    ]);
+  },
+});
+
+const storeToIndexedDB = (info: FileInfo) => {
+  void IndexedDB.storeFileInfo({
+    ...info,
+    categoryIds: info.categories.map(({ id }) => id),
+  });
+
+  info.categories.forEach((category) => {
+    void IndexedDB.storeCategoryInfo(category);
+  });
+
+  return { ...info, exists: true as const };
+};
+
+const bulkStoreToIndexedDB = (infos: FileInfo[]) => {
+  // TODO: Bulk Upsert
+  infos.forEach((info) => {
+    void IndexedDB.storeFileInfo({
+      ...info,
+      categoryIds: info.categories.map(({ id }) => id),
+    });
+  });
+
+  // TODO: Bulk Upsert
+  new Map(
+    infos.flatMap(({ categories }) => categories).map((category) => [category.id, category]),
+  ).forEach((category) => {
+    void IndexedDB.storeCategoryInfo(category);
+  });
+
+  return infos.map((info) => [info.id, { ...info, exists: true }] as const);
+};
+
+export const getFileInfo = (id: number, masterKey: CryptoKey) => {
+  return cache.get(id, masterKey);
+};
+
+export const bulkGetFileInfo = (ids: number[], masterKey: CryptoKey) => {
+  return cache.bulkGet(new Set(ids), masterKey);
+};

src/lib/modules/filesystem/index.ts

@@ -0,0 +1,4 @@
+export * from "./category";
+export * from "./directory";
+export * from "./file";
+export * from "./types";

src/lib/modules/filesystem/internal.svelte.ts

@@ -0,0 +1,172 @@
+import { untrack } from "svelte";
+import { unwrapDataKey, decryptString } from "$lib/modules/crypto";
+
+interface FilesystemCacheOptions<K, V> {
+  fetchFromIndexedDB: (key: K) => Promise<V | undefined>;
+  fetchFromServer: (key: K, cachedValue: V | undefined, masterKey: CryptoKey) => Promise<V>;
+  bulkFetchFromIndexedDB?: (keys: Set<K>) => Promise<Map<K, V>>;
+  bulkFetchFromServer?: (
+    keys: Map<K, { cachedValue: V | undefined }>,
+    masterKey: CryptoKey,
+  ) => Promise<Map<K, V>>;
+}
+
+export class FilesystemCache<K, V extends object> {
+  private map = new Map<K, { value?: V; promise?: Promise<V> }>();
+
+  constructor(private readonly options: FilesystemCacheOptions<K, V>) {}
+
+  get(key: K, masterKey: CryptoKey) {
+    return untrack(() => {
+      let state = this.map.get(key);
+      if (state?.promise) return state.value ?? state.promise;
+
+      const { promise: newPromise, resolve } = Promise.withResolvers<V>();
+
+      if (!state) {
+        const newState = $state({});
+        state = newState;
+        this.map.set(key, newState);
+      }
+
+      (state.value
+        ? Promise.resolve(state.value)
+        : this.options.fetchFromIndexedDB(key).then((loadedInfo) => {
+            if (loadedInfo) {
+              state.value = loadedInfo;
+              resolve(state.value);
+            }
+            return loadedInfo;
+          })
+      )
+        .then((cachedInfo) => this.options.fetchFromServer(key, cachedInfo, masterKey))
+        .then((loadedInfo) => {
+          if (state.value) {
+            Object.assign(state.value, loadedInfo);
+          } else {
+            state.value = loadedInfo;
+          }
+          resolve(state.value);
+        })
+        .finally(() => {
+          state.promise = undefined;
+        });
+
+      state.promise = newPromise;
+      return state.value ?? newPromise;
+    });
+  }
+
+  bulkGet(keys: Set<K>, masterKey: CryptoKey) {
+    return untrack(() => {
+      const newPromises = new Map(
+        keys
+          .keys()
+          .filter((key) => this.map.get(key)?.promise === undefined)
+          .map((key) => [key, Promise.withResolvers<V>()]),
+      );
+      newPromises.forEach(({ promise }, key) => {
+        const state = this.map.get(key);
+        if (state) {
+          state.promise = promise;
+        } else {
+          const newState = $state({ promise });
+          this.map.set(key, newState);
+        }
+      });
+
+      const resolve = (loadedInfos: Map<K, V>) => {
+        loadedInfos.forEach((loadedInfo, key) => {
+          const state = this.map.get(key)!;
+          if (state.value) {
+            Object.assign(state.value, loadedInfo);
+          } else {
+            state.value = loadedInfo;
+          }
+          newPromises.get(key)!.resolve(state.value);
+        });
+        return loadedInfos;
+      };
+
+      this.options.bulkFetchFromIndexedDB!(
+        new Set(newPromises.keys().filter((key) => this.map.get(key)!.value === undefined)),
+      )
+        .then(resolve)
+        .then(() =>
+          this.options.bulkFetchFromServer!(
+            new Map(
+              newPromises.keys().map((key) => [key, { cachedValue: this.map.get(key)!.value }]),
+            ),
+            masterKey,
+          ),
+        )
+        .then(resolve)
+        .finally(() => {
+          newPromises.forEach((_, key) => {
+            this.map.get(key)!.promise = undefined;
+          });
+        });
+
+      const bottleneckPromises = Array.from(
+        keys
+          .keys()
+          .filter((key) => this.map.get(key)!.value === undefined)
+          .map((key) => this.map.get(key)!.promise!),
+      );
+      const makeResult = () =>
+        new Map(keys.keys().map((key) => [key, this.map.get(key)!.value!] as const));
+      return bottleneckPromises.length > 0
+        ? Promise.all(bottleneckPromises).then(makeResult)
+        : makeResult();
+    });
+  }
+}
+
+export const decryptDirectoryMetadata = async (
+  metadata: { dek: string; dekVersion: Date; name: string; nameIv: string },
+  masterKey: CryptoKey,
+) => {
+  const { dataKey } = await unwrapDataKey(metadata.dek, masterKey);
+  const name = await decryptString(metadata.name, metadata.nameIv, dataKey);
+
+  return {
+    dataKey: { key: dataKey, version: metadata.dekVersion },
+    name,
+  };
+};
+
+const decryptDate = async (ciphertext: string, iv: string, dataKey: CryptoKey) => {
+  return new Date(parseInt(await decryptString(ciphertext, iv, dataKey), 10));
+};
+
+export const decryptFileMetadata = async (
+  metadata: {
+    dek: string;
+    dekVersion: Date;
+    name: string;
+    nameIv: string;
+    createdAt?: string;
+    createdAtIv?: string;
+    lastModifiedAt: string;
+    lastModifiedAtIv: string;
+  },
+  masterKey: CryptoKey,
+) => {
+  const { dataKey } = await unwrapDataKey(metadata.dek, masterKey);
+  const [name, createdAt, lastModifiedAt] = await Promise.all([
+    decryptString(metadata.name, metadata.nameIv, dataKey),
+    metadata.createdAt
+      ? decryptDate(metadata.createdAt, metadata.createdAtIv!, dataKey)
+      : undefined,
+    decryptDate(metadata.lastModifiedAt, metadata.lastModifiedAtIv, dataKey),
+  ]);
+
+  return {
+    dataKey: { key: dataKey, version: metadata.dekVersion },
+    name,
+    createdAt,
+    lastModifiedAt,
+  };
+};
+
+export const decryptCategoryMetadata = decryptDirectoryMetadata;

src/lib/modules/filesystem/types.ts

@@ -0,0 +1,77 @@
+export type DataKey = { key: CryptoKey; version: Date };
+type AllUndefined<T> = { [K in keyof T]?: undefined };
+
+interface LocalDirectoryInfo {
+  id: number;
+  parentId: DirectoryId;
+  dataKey?: DataKey;
+  name: string;
+  subDirectories: SubDirectoryInfo[];
+  files: SummarizedFileInfo[];
+}
+
+interface RootDirectoryInfo {
+  id: "root";
+  parentId?: undefined;
+  dataKey?: undefined;
+  name?: undefined;
+  subDirectories: SubDirectoryInfo[];
+  files: SummarizedFileInfo[];
+}
+
+export type DirectoryInfo = LocalDirectoryInfo | RootDirectoryInfo;
+export type MaybeDirectoryInfo =
+  | (DirectoryInfo & { exists: true })
+  | ({ id: DirectoryId; exists: false } & AllUndefined<Omit<DirectoryInfo, "id">>);
+
+export type SubDirectoryInfo = Omit<LocalDirectoryInfo, "subDirectories" | "files">;
+
+export interface FileInfo {
+  id: number;
+  isLegacy?: boolean;
+  parentId: DirectoryId;
+  dataKey?: DataKey;
+  contentType: string;
+  name: string;
+  createdAt?: Date;
+  lastModifiedAt: Date;
+  categories: FileCategoryInfo[];
+}
+
+export type MaybeFileInfo =
+  | (FileInfo & { exists: true })
+  | ({ id: number; exists: false } & AllUndefined<Omit<FileInfo, "id">>);
+
+export type SummarizedFileInfo = Omit<FileInfo, "categories">;
+export type CategoryFileInfo = SummarizedFileInfo & { isRecursive: boolean };
+
+interface LocalCategoryInfo {
+  id: number;
+  parentId: DirectoryId;
+  dataKey?: DataKey;
+  name: string;
+  subCategories: SubCategoryInfo[];
+  files: CategoryFileInfo[];
+  isFileRecursive: boolean;
+}
+
+interface RootCategoryInfo {
+  id: "root";
+  parentId?: undefined;
+  dataKey?: undefined;
+  name?: undefined;
+  subCategories: SubCategoryInfo[];
+  files?: undefined;
+  isFileRecursive?: undefined;
+}
+
+export type CategoryInfo = LocalCategoryInfo | RootCategoryInfo;
+export type MaybeCategoryInfo =
+  | (CategoryInfo & { exists: true })
+  | ({ id: CategoryId; exists: false } & AllUndefined<Omit<CategoryInfo, "id">>);
+
+export type SubCategoryInfo = Omit<
+  LocalCategoryInfo,
+  "subCategories" | "files" | "isFileRecursive"
+>;
+export type FileCategoryInfo = Omit<SubCategoryInfo, "dataKey">;

src/lib/modules/http.ts

@@ -0,0 +1,22 @@
+export const parseRangeHeader = (value: string | null) => {
+  if (!value) return undefined;
+
+  const firstRange = value.split(",")[0]!.trim();
+  const parts = firstRange.replace(/bytes=/, "").split("-");
+  return {
+    start: parts[0] ? parseInt(parts[0], 10) : undefined,
+    end: parts[1] ? parseInt(parts[1], 10) : undefined,
+  };
+};
+
+export const getContentRangeHeader = (range?: { start: number; end: number; total: number }) => {
+  return range && { "Content-Range": `bytes ${range.start}-${range.end}/${range.total}` };
+};
+
+export const parseContentDigestHeader = (value: string | null) => {
+  if (!value) return undefined;
+
+  const firstDigest = value.split(",")[0]!.trim();
+  const match = firstDigest.match(/^sha-256=:([A-Za-z0-9+/=]+):$/);
+  return match?.[1];
+};

src/lib/modules/key.ts

@@ -0,0 +1,65 @@
+import { z } from "zod";
+import { storeClientKey } from "$lib/indexedDB";
+import type { ClientKeys } from "$lib/stores";
+
+const SerializedClientKeysSchema = z.intersection(
+  z.object({
+    generator: z.literal("ArkVault"),
+    exportedAt: z.iso.datetime(),
+  }),
+  z.object({
+    version: z.literal(1),
+    encryptKey: z.base64().nonempty(),
+    decryptKey: z.base64().nonempty(),
+    signKey: z.base64().nonempty(),
+    verifyKey: z.base64().nonempty(),
+  }),
+);
+
+type SerializedClientKeys = z.infer<typeof SerializedClientKeysSchema>;
+
+type DeserializedClientKeys = {
+  encryptKeyBase64: string;
+  decryptKeyBase64: string;
+  signKeyBase64: string;
+  verifyKeyBase64: string;
+};
+
+export const serializeClientKeys = ({
+  encryptKeyBase64,
+  decryptKeyBase64,
+  signKeyBase64,
+  verifyKeyBase64,
+}: DeserializedClientKeys) => {
+  return JSON.stringify({
+    version: 1,
+    generator: "ArkVault",
+    exportedAt: new Date().toISOString(),
+    encryptKey: encryptKeyBase64,
+    decryptKey: decryptKeyBase64,
+    signKey: signKeyBase64,
+    verifyKey: verifyKeyBase64,
+  } satisfies SerializedClientKeys);
+};
+
+export const deserializeClientKeys = (serialized: string) => {
+  const zodRes = SerializedClientKeysSchema.safeParse(JSON.parse(serialized));
+  if (zodRes.success) {
+    return {
+      encryptKeyBase64: zodRes.data.encryptKey,
+      decryptKeyBase64: zodRes.data.decryptKey,
+      signKeyBase64: zodRes.data.signKey,
+      verifyKeyBase64: zodRes.data.verifyKey,
+    } satisfies DeserializedClientKeys;
+  }
+  return undefined;
+};
+
+export const storeClientKeys = async (clientKeys: ClientKeys) => {
+  await Promise.all([
+    storeClientKey(clientKeys.encryptKey, "encrypt"),
+    storeClientKey(clientKeys.decryptKey, "decrypt"),
+    storeClientKey(clientKeys.signKey, "sign"),
+    storeClientKey(clientKeys.verifyKey, "verify"),
+  ]);
+};

src/lib/modules/opfs.ts

@@ -1,13 +1,5 @@
-let rootHandle: FileSystemDirectoryHandle | null = null;
-
-export const prepareOpfs = async () => {
-  rootHandle = await navigator.storage.getDirectory();
-};
-
 const getFileHandle = async (path: string, create = true) => {
-  if (!rootHandle) {
+  if (path[0] !== "/") {
-    throw new Error("OPFS not prepared");
-  } else if (path[0] !== "/") {
     throw new Error("Path must be absolute");
   }
 
@@ -17,7 +9,7 @@ const getFileHandle = async (path: string, create = true) => {
   }
 
   try {
-    let directoryHandle = rootHandle;
+    let directoryHandle = await navigator.storage.getDirectory();
     for (const part of parts.slice(0, -1)) {
       if (!part) continue;
       directoryHandle = await directoryHandle.getDirectoryHandle(part, { create });
@@ -34,12 +26,15 @@ const getFileHandle = async (path: string, create = true) => {
   }
 };
 
-export const readFile = async (path: string) => {
+export const getFile = async (path: string) => {
   const { fileHandle } = await getFileHandle(path, false);
   if (!fileHandle) return null;
 
-  const file = await fileHandle.getFile();
+  return await fileHandle.getFile();
-  return await file.arrayBuffer();
+};
+
+export const readFile = async (path: string) => {
+  return (await getFile(path))?.arrayBuffer() ?? null;
 };
 
 export const writeFile = async (path: string, data: ArrayBuffer) => {
@@ -59,3 +54,37 @@ export const deleteFile = async (path: string) => {
 
   await parentHandle.removeEntry(filename);
 };
+
+const getDirectoryHandle = async (path: string) => {
+  if (path[0] !== "/") {
+    throw new Error("Path must be absolute");
+  }
+
+  const parts = path.split("/");
+  if (parts.length <= 1) {
+    throw new Error("Invalid path");
+  }
+
+  try {
+    let directoryHandle = await navigator.storage.getDirectory();
+    let parentHandle;
+    for (const part of parts.slice(1)) {
+      if (!part) continue;
+      parentHandle = directoryHandle;
+      directoryHandle = await directoryHandle.getDirectoryHandle(part);
+    }
+    return { directoryHandle, parentHandle };
+  } catch (e) {
+    if (e instanceof DOMException && e.name === "NotFoundError") {
+      return {};
+    }
+    throw e;
+  }
+};
+
+export const deleteDirectory = async (path: string) => {
+  const { directoryHandle, parentHandle } = await getDirectoryHandle(path);
+  if (!parentHandle) return;
+
+  await parentHandle.removeEntry(directoryHandle.name, { recursive: true });
+};

src/lib/modules/scheduler.ts

@@ -0,0 +1,48 @@
+export class Scheduler<T = void> {
+  private isEstimating = false;
+  private memoryUsage = 0;
+  private queue: (() => void)[] = [];
+
+  constructor(public readonly memoryLimit = 100 * 1024 * 1024 /* 100 MiB */) {}
+
+  private next() {
+    if (!this.isEstimating && this.memoryUsage < this.memoryLimit) {
+      const resolve = this.queue.shift();
+      if (resolve) {
+        this.isEstimating = true;
+        resolve();
+      }
+    }
+  }
+
+  async schedule(
+    estimateMemoryUsage: number | (() => number | Promise<number>),
+    task: () => Promise<T>,
+  ) {
+    if (this.isEstimating || this.memoryUsage >= this.memoryLimit) {
+      await new Promise<void>((resolve) => {
+        this.queue.push(resolve);
+      });
+    } else {
+      this.isEstimating = true;
+    }
+
+    let taskMemoryUsage = 0;
+
+    try {
+      taskMemoryUsage =
+        typeof estimateMemoryUsage === "number" ? estimateMemoryUsage : await estimateMemoryUsage();
+      this.memoryUsage += taskMemoryUsage;
+    } finally {
+      this.isEstimating = false;
+      this.next();
+    }
+
+    try {
+      return await task();
+    } finally {
+      this.memoryUsage -= taskMemoryUsage;
+      this.next();
+    }
+  }
+}

src/lib/modules/thumbnail.ts

@@ -0,0 +1,143 @@
+import { encodeToBase64 } from "$lib/modules/crypto";
+
+const scaleSize = (width: number, height: number, targetSize: number) => {
+  if (width <= targetSize || height <= targetSize) {
+    return { width, height };
+  }
+
+  const scale = targetSize / Math.min(width, height);
+  return {
+    width: Math.round(width * scale),
+    height: Math.round(height * scale),
+  };
+};
+
+const capture = (
+  width: number,
+  height: number,
+  drawer: (context: CanvasRenderingContext2D, width: number, height: number) => void,
+  targetSize = 250,
+) => {
+  return new Promise<Blob>((resolve, reject) => {
+    const canvas = document.createElement("canvas");
+    const { width: scaledWidth, height: scaledHeight } = scaleSize(width, height, targetSize);
+
+    canvas.width = scaledWidth;
+    canvas.height = scaledHeight;
+
+    const context = canvas.getContext("2d");
+    if (!context) {
+      return reject(new Error("Failed to generate thumbnail"));
+    }
+
+    drawer(context, scaledWidth, scaledHeight);
+    canvas.toBlob((blob) => {
+      if (blob && blob.type === "image/webp") {
+        resolve(blob);
+      } else {
+        reject(new Error("Failed to generate thumbnail"));
+      }
+    }, "image/webp");
+  });
+};
+
+const generateImageThumbnail = (imageUrl: string) => {
+  return new Promise<Blob>((resolve, reject) => {
+    const image = new Image();
+    image.onload = () => {
+      capture(image.width, image.height, (context, width, height) => {
+        context.drawImage(image, 0, 0, width, height);
+      })
+        .then(resolve)
+        .catch(reject);
+    };
+    image.onerror = reject;
+
+    image.src = imageUrl;
+  });
+};
+
+export const captureVideoThumbnail = (video: HTMLVideoElement) => {
+  return capture(video.videoWidth, video.videoHeight, (context, width, height) => {
+    context.drawImage(video, 0, 0, width, height);
+  });
+};
+
+const generateVideoThumbnail = (videoUrl: string, time = 0) => {
+  return new Promise<Blob>((resolve, reject) => {
+    const video = document.createElement("video");
+    video.onloadedmetadata = () => {
+      if (video.videoWidth === 0 || video.videoHeight === 0) {
+        return reject();
+      }
+
+      const callbackId = video.requestVideoFrameCallback(() => {
+        captureVideoThumbnail(video).then(resolve).catch(reject);
+        video.cancelVideoFrameCallback(callbackId);
+      });
+      video.currentTime = Math.min(time, video.duration);
+    };
+    video.onerror = reject;
+
+    video.muted = true;
+    video.playsInline = true;
+    video.src = videoUrl;
+  });
+};
+
+export const generateThumbnail = async (fileBuffer: ArrayBuffer, fileType: string) => {
+  let url;
+  try {
+    if (fileType.startsWith("image/")) {
+      const fileBlob = new Blob([fileBuffer], { type: fileType });
+      url = URL.createObjectURL(fileBlob);
+
+      try {
+        return await generateImageThumbnail(url);
+      } catch {
+        URL.revokeObjectURL(url);
+        url = undefined;
+
+        if (fileType === "image/heic") {
+          const { default: heic2any } = await import("heic2any");
+          url = URL.createObjectURL(
+            (await heic2any({ blob: fileBlob, toType: "image/png" })) as Blob,
+          );
+          return await generateImageThumbnail(url);
+        } else {
+          return null;
+        }
+      }
+    } else if (fileType.startsWith("video/")) {
+      url = URL.createObjectURL(new Blob([fileBuffer], { type: fileType }));
+      return await generateVideoThumbnail(url);
+    }
+    return null;
+  } catch {
+    return null;
+  } finally {
+    if (url) {
+      URL.revokeObjectURL(url);
+    }
+  }
+};
+
+export const generateThumbnailFromFile = async (file: File) => {
+  if (!file.type.startsWith("video/")) return null;
+
+  let url;
+  try {
+    url = URL.createObjectURL(file);
+    return await generateVideoThumbnail(url);
+  } catch {
+    return null;
+  } finally {
+    if (url) {
+      URL.revokeObjectURL(url);
+    }
+  }
+};
+
+export const getThumbnailUrl = (thumbnailBuffer: ArrayBuffer) => {
+  return `data:image/webp;base64,${encodeToBase64(thumbnailBuffer)}`;
+};

src/lib/schemas/filesystem.ts

@@ -0,0 +1,4 @@
+import { z } from "zod";
+
+export const DirectoryIdSchema = z.union([z.literal("root"), z.int().positive()]);
+export const CategoryIdSchema = z.union([z.literal("root"), z.int().positive()]);

src/lib/schemas/index.ts

@@ -0,0 +1 @@
+export * from "./filesystem";

src/lib/server/db/category.ts

@@ -2,8 +2,6 @@ import { IntegrityError } from "./error";
 import db from "./kysely";
 import type { Ciphertext } from "./schema";
 
-export type CategoryId = "root" | number;
-
 interface Category {
   id: number;
   parentId: CategoryId;

src/lib/server/db/client.ts

@@ -98,22 +98,6 @@ export const createUserClient = async (userId: number, clientId: number) => {
   }
 };
 
-export const getAllUserClients = async (userId: number) => {
-  const userClients = await db
-    .selectFrom("user_client")
-    .selectAll()
-    .where("user_id", "=", userId)
-    .execute();
-  return userClients.map(
-    ({ user_id, client_id, state }) =>
-      ({
-        userId: user_id,
-        clientId: client_id,
-        state,
-      }) satisfies UserClient,
-  );
-};
-
 export const getUserClient = async (userId: number, clientId: number) => {
   const userClient = await db
     .selectFrom("user_client")
@@ -178,7 +162,7 @@ export const registerUserClientChallenge = async (
   allowedIp: string,
   expiresAt: Date,
 ) => {
-  await db
+  const { id } = await db
     .insertInto("user_client_challenge")
     .values({
       user_id: userId,
@@ -187,19 +171,25 @@ export const registerUserClientChallenge = async (
       allowed_ip: allowedIp,
       expires_at: expiresAt,
     })
-    .execute();
+    .returning("id")
+    .executeTakeFirstOrThrow();
+  return { id };
 };
 
-export const consumeUserClientChallenge = async (userId: number, answer: string, ip: string) => {
+export const consumeUserClientChallenge = async (
+  challengeId: number,
+  userId: number,
+  ip: string,
+) => {
   const challenge = await db
     .deleteFrom("user_client_challenge")
+    .where("id", "=", challengeId)
     .where("user_id", "=", userId)
-    .where("answer", "=", answer)
     .where("allowed_ip", "=", ip)
     .where("expires_at", ">", new Date())
-    .returning("client_id")
+    .returning(["client_id", "answer"])
     .executeTakeFirst();
-  return challenge ? { clientId: challenge.client_id } : null;
+  return challenge ? { clientId: challenge.client_id, answer: challenge.answer } : null;
 };
 
 export const cleanupExpiredUserClientChallenges = async () => {

src/lib/server/db/file.ts

@@ -1,11 +1,10 @@
-import { sql, type NotNull } from "kysely";
+import { sql } from "kysely";
+import { jsonArrayFrom } from "kysely/helpers/postgres";
 import pg from "pg";
 import { IntegrityError } from "./error";
 import db from "./kysely";
 import type { Ciphertext } from "./schema";
 
-export type DirectoryId = "root" | number;
-
 interface Directory {
   id: number;
   parentId: DirectoryId;
@@ -16,8 +15,6 @@ interface Directory {
   encName: Ciphertext;
 }
 
-export type NewDirectory = Omit<Directory, "id">;
-
 interface File {
   id: number;
   parentId: DirectoryId;
@@ -29,16 +26,23 @@ interface File {
   hskVersion: number | null;
   contentHmac: string | null;
   contentType: string;
-  encContentIv: string;
+  encContentIv: string | null;
   encContentHash: string;
   encName: Ciphertext;
   encCreatedAt: Ciphertext | null;
   encLastModifiedAt: Ciphertext;
 }
 
-export type NewFile = Omit<File, "id">;
+interface FileCategory {
+  id: number;
+  parentId: CategoryId;
+  mekVersion: number;
+  encDek: string;
+  dekVersion: Date;
+  encName: Ciphertext;
+}
 
-export const registerDirectory = async (params: NewDirectory) => {
+export const registerDirectory = async (params: Omit<Directory, "id">) => {
   await db.transaction().execute(async (trx) => {
     const mek = await trx
       .selectFrom("master_encryption_key")
@@ -163,16 +167,24 @@ export const unregisterDirectory = async (userId: number, directoryId: number) =
     .setIsolationLevel("repeatable read") // TODO: Sufficient?
     .execute(async (trx) => {
       const unregisterFiles = async (parentId: number) => {
-        return await trx
+        const files = await trx
+          .selectFrom("file")
+          .leftJoin("thumbnail", "file.id", "thumbnail.file_id")
+          .select(["file.id", "file.path", "thumbnail.path as thumbnailPath"])
+          .where("file.parent_id", "=", parentId)
+          .where("file.user_id", "=", userId)
+          .forUpdate("file")
+          .execute();
+        await trx
           .deleteFrom("file")
           .where("parent_id", "=", parentId)
           .where("user_id", "=", userId)
-          .returning(["id", "path"])
           .execute();
+        return files;
       };
       const unregisterDirectoryRecursively = async (
         directoryId: number,
-      ): Promise<{ id: number; path: string }[]> => {
+      ): Promise<{ id: number; path: string; thumbnailPath: string | null }[]> => {
         const files = await unregisterFiles(directoryId);
         const subDirectories = await trx
           .selectFrom("directory")
@@ -198,38 +210,11 @@ export const unregisterDirectory = async (userId: number, directoryId: number) =
     });
 };
 
-export const registerFile = async (params: NewFile) => {
+export const registerFile = async (trx: typeof db, params: Omit<File, "id">) => {
   if ((params.hskVersion && !params.contentHmac) || (!params.hskVersion && params.contentHmac)) {
     throw new Error("Invalid arguments");
   }
 
-  return await db.transaction().execute(async (trx) => {
-    const mek = await trx
-      .selectFrom("master_encryption_key")
-      .select("version")
-      .where("user_id", "=", params.userId)
-      .where("state", "=", "active")
-      .limit(1)
-      .forUpdate()
-      .executeTakeFirst();
-    if (mek?.version !== params.mekVersion) {
-      throw new IntegrityError("Inactive MEK version");
-    }
-
-    if (params.hskVersion) {
-      const hsk = await trx
-        .selectFrom("hmac_secret_key")
-        .select("version")
-        .where("user_id", "=", params.userId)
-        .where("state", "=", "active")
-        .limit(1)
-        .forUpdate()
-        .executeTakeFirst();
-      if (hsk?.version !== params.hskVersion) {
-        throw new IntegrityError("Inactive HSK version");
-      }
-    }
-
   const { fileId } = await trx
     .insertInto("file")
     .values({
@@ -260,7 +245,6 @@ export const registerFile = async (params: NewFile) => {
     })
     .execute();
   return { id: fileId };
-  });
 };
 
 export const getAllFilesByParent = async (userId: number, parentId: DirectoryId) => {
@@ -298,38 +282,56 @@ export const getAllFilesByCategory = async (
   recurse: boolean,
 ) => {
   const files = await db
-    .withRecursive("cte", (db) =>
+    .withRecursive("category_tree", (db) =>
       db
         .selectFrom("category")
-        .leftJoin("file_category", "category.id", "file_category.category_id")
+        .select(["id", sql<number>`0`.as("depth")])
-        .select(["id", "parent_id", "user_id", "file_category.file_id"])
-        .select(sql<number>`0`.as("depth"))
         .where("id", "=", categoryId)
+        .where("user_id", "=", userId)
         .$if(recurse, (qb) =>
           qb.unionAll((db) =>
             db
               .selectFrom("category")
-              .leftJoin("file_category", "category.id", "file_category.category_id")
+              .innerJoin("category_tree", "category.parent_id", "category_tree.id")
-              .innerJoin("cte", "category.parent_id", "cte.id")
+              .select(["category.id", sql<number>`depth + 1`.as("depth")]),
-              .select([
-                "category.id",
-                "category.parent_id",
-                "category.user_id",
-                "file_category.file_id",
-              ])
-              .select(sql<number>`cte.depth + 1`.as("depth")),
           ),
         ),
     )
-    .selectFrom("cte")
+    .selectFrom("category_tree")
+    .innerJoin("file_category", "category_tree.id", "file_category.category_id")
+    .innerJoin("file", "file_category.file_id", "file.id")
     .select(["file_id", "depth"])
+    .selectAll("file")
     .distinctOn("file_id")
-    .where("user_id", "=", userId)
+    .orderBy("file_id")
-    .where("file_id", "is not", null)
+    .orderBy("depth")
-    .$narrowType<{ file_id: NotNull }>()
-    .orderBy(["file_id", "depth"])
     .execute();
-  return files.map(({ file_id, depth }) => ({ id: file_id, isRecursive: depth > 0 }));
+  return files.map(
+    (file) =>
+      ({
+        id: file.file_id,
+        parentId: file.parent_id ?? "root",
+        userId: file.user_id,
+        path: file.path,
+        mekVersion: file.master_encryption_key_version,
+        encDek: file.encrypted_data_encryption_key,
+        dekVersion: file.data_encryption_key_version,
+        hskVersion: file.hmac_secret_key_version,
+        contentHmac: file.content_hmac,
+        contentType: file.content_type,
+        encContentIv: file.encrypted_content_iv,
+        encContentHash: file.encrypted_content_hash,
+        encName: file.encrypted_name,
+        encCreatedAt: file.encrypted_created_at,
+        encLastModifiedAt: file.encrypted_last_modified_at,
+        isRecursive: file.depth > 0,
+      }) satisfies File & { isRecursive: boolean },
+  );
+};
+
+export const getAllFileIds = async (userId: number) => {
+  const files = await db.selectFrom("file").select("id").where("user_id", "=", userId).execute();
+  return files.map(({ id }) => id);
 };
 
 export const getAllFileIdsByContentHmac = async (
@@ -344,7 +346,7 @@ export const getAllFileIdsByContentHmac = async (
     .where("hmac_secret_key_version", "=", hskVersion)
     .where("content_hmac", "=", contentHmac)
     .execute();
-  return files.map(({ id }) => ({ id }));
+  return files.map(({ id }) => id);
 };
 
 export const getFile = async (userId: number, fileId: number) => {
@@ -376,6 +378,52 @@ export const getFile = async (userId: number, fileId: number) => {
     : null;
 };
 
+export const getFilesWithCategories = async (userId: number, fileIds: number[]) => {
+  const files = await db
+    .selectFrom("file")
+    .selectAll()
+    .select((eb) =>
+      jsonArrayFrom(
+        eb
+          .selectFrom("file_category")
+          .innerJoin("category", "file_category.category_id", "category.id")
+          .where("file_category.file_id", "=", eb.ref("file.id"))
+          .selectAll("category"),
+      ).as("categories"),
+    )
+    .where("id", "=", (eb) => eb.fn.any(eb.val(fileIds)))
+    .where("user_id", "=", userId)
+    .execute();
+  return files.map(
+    (file) =>
+      ({
+        id: file.id,
+        parentId: file.parent_id ?? "root",
+        userId: file.user_id,
+        path: file.path,
+        mekVersion: file.master_encryption_key_version,
+        encDek: file.encrypted_data_encryption_key,
+        dekVersion: file.data_encryption_key_version,
+        hskVersion: file.hmac_secret_key_version,
+        contentHmac: file.content_hmac,
+        contentType: file.content_type,
+        encContentIv: file.encrypted_content_iv,
+        encContentHash: file.encrypted_content_hash,
+        encName: file.encrypted_name,
+        encCreatedAt: file.encrypted_created_at,
+        encLastModifiedAt: file.encrypted_last_modified_at,
+        categories: file.categories.map((category) => ({
+          id: category.id,
+          parentId: category.parent_id ?? "root",
+          mekVersion: category.master_encryption_key_version,
+          encDek: category.encrypted_data_encryption_key,
+          dekVersion: new Date(category.data_encryption_key_version),
+          encName: category.encrypted_name,
+        })),
+      }) satisfies File & { categories: FileCategory[] },
+  );
+};
+
 export const setFileEncName = async (
   userId: number,
   fileId: number,
@@ -416,16 +464,22 @@ export const setFileEncName = async (
 };
 
 export const unregisterFile = async (userId: number, fileId: number) => {
-  const file = await db
+  return await db.transaction().execute(async (trx) => {
-    .deleteFrom("file")
+    const file = await trx
-    .where("id", "=", fileId)
+      .selectFrom("file")
-    .where("user_id", "=", userId)
+      .leftJoin("thumbnail", "file.id", "thumbnail.file_id")
-    .returning("path")
+      .select(["file.path", "thumbnail.path as thumbnailPath"])
+      .where("file.id", "=", fileId)
+      .where("file.user_id", "=", userId)
+      .forUpdate("file")
       .executeTakeFirst();
     if (!file) {
       throw new IntegrityError("File not found");
     }
-  return { path: file.path };
+
+    await trx.deleteFrom("file").where("id", "=", fileId).execute();
+    return file;
+  });
 };
 
 export const addFileToCategory = async (fileId: number, categoryId: number) => {
@@ -456,10 +510,21 @@ export const addFileToCategory = async (fileId: number, categoryId: number) => {
 export const getAllFileCategories = async (fileId: number) => {
   const categories = await db
     .selectFrom("file_category")
-    .select("category_id")
+    .innerJoin("category", "file_category.category_id", "category.id")
+    .selectAll("category")
     .where("file_id", "=", fileId)
     .execute();
-  return categories.map(({ category_id }) => ({ id: category_id }));
+  return categories.map(
+    (category) =>
+      ({
+        id: category.id,
+        parentId: category.parent_id ?? "root",
+        mekVersion: category.master_encryption_key_version,
+        encDek: category.encrypted_data_encryption_key,
+        dekVersion: category.data_encryption_key_version,
+        encName: category.encrypted_name,
+      }) satisfies FileCategory,
+  );
 };
 
 export const removeFileFromCategory = async (fileId: number, categoryId: number) => {

src/lib/server/db/index.ts

@@ -0,0 +1,11 @@
+export * as CategoryRepo from "./category";
+export * as ClientRepo from "./client";
+export * as FileRepo from "./file";
+export * as HskRepo from "./hsk";
+export * as MediaRepo from "./media";
+export * as MekRepo from "./mek";
+export * as SessionRepo from "./session";
+export * as UploadRepo from "./upload";
+export * as UserRepo from "./user";
+
+export * from "./error";

src/lib/server/db/media.ts

@@ -0,0 +1,109 @@
+import type { NotNull } from "kysely";
+import { IntegrityError } from "./error";
+import db from "./kysely";
+
+interface Thumbnail {
+  id: number;
+  path: string;
+  updatedAt: Date;
+  encContentIv: string | null;
+}
+
+interface FileThumbnail extends Thumbnail {
+  fileId: number;
+}
+
+export const updateFileThumbnail = async (
+  trx: typeof db,
+  userId: number,
+  fileId: number,
+  dekVersion: Date,
+  path: string,
+  encContentIv: string | null,
+) => {
+  const file = await trx
+    .selectFrom("file")
+    .select("data_encryption_key_version")
+    .where("id", "=", fileId)
+    .where("user_id", "=", userId)
+    .limit(1)
+    .forUpdate()
+    .executeTakeFirst();
+  if (!file) {
+    throw new IntegrityError("File not found");
+  } else if (file.data_encryption_key_version.getTime() !== dekVersion.getTime()) {
+    throw new IntegrityError("Invalid DEK version");
+  }
+
+  const thumbnail = await trx
+    .selectFrom("thumbnail")
+    .select("path as oldPath")
+    .where("file_id", "=", fileId)
+    .limit(1)
+    .forUpdate()
+    .executeTakeFirst();
+  const now = new Date();
+
+  await trx
+    .insertInto("thumbnail")
+    .values({
+      file_id: fileId,
+      path,
+      updated_at: now,
+      encrypted_content_iv: encContentIv,
+    })
+    .onConflict((oc) =>
+      oc.column("file_id").doUpdateSet({
+        path,
+        updated_at: now,
+        encrypted_content_iv: encContentIv,
+      }),
+    )
+    .execute();
+  return thumbnail?.oldPath ?? null;
+};
+
+export const getFileThumbnail = async (userId: number, fileId: number) => {
+  const thumbnail = await db
+    .selectFrom("thumbnail")
+    .innerJoin("file", "thumbnail.file_id", "file.id")
+    .selectAll("thumbnail")
+    .where("file.id", "=", fileId)
+    .where("file.user_id", "=", userId)
+    .$narrowType<{ file_id: NotNull }>()
+    .limit(1)
+    .executeTakeFirst();
+  return thumbnail
+    ? ({
+        id: thumbnail.id,
+        fileId: thumbnail.file_id,
+        path: thumbnail.path,
+        encContentIv: thumbnail.encrypted_content_iv,
+        updatedAt: thumbnail.updated_at,
+      } satisfies FileThumbnail)
+    : null;
+};
+
+export const getMissingFileThumbnails = async (userId: number, limit: number = 100) => {
+  const files = await db
+    .selectFrom("file")
+    .select("id")
+    .where("user_id", "=", userId)
+    .where((eb) =>
+      eb.or([eb("content_type", "like", "image/%"), eb("content_type", "like", "video/%")]),
+    )
+    .where((eb) =>
+      eb.not(
+        eb.exists(
+          eb
+            .selectFrom("thumbnail")
+            .select("thumbnail.id")
+            .whereRef("thumbnail.file_id", "=", "file.id")
+            .limit(1),
+        ),
+      ),
+    )
+    .limit(limit)
+    .execute();
+  return files.map(({ id }) => id);
+};

src/lib/server/db/mek.ts

@@ -60,19 +60,6 @@ export const registerInitialMek = async (
   });
 };
 
-export const getInitialMek = async (userId: number) => {
-  const mek = await db
-    .selectFrom("master_encryption_key")
-    .selectAll()
-    .where("user_id", "=", userId)
-    .where("version", "=", 1)
-    .limit(1)
-    .executeTakeFirst();
-  return mek
-    ? ({ userId: mek.user_id, version: mek.version, state: mek.state } satisfies Mek)
-    : null;
-};
-
 export const getAllValidClientMeks = async (userId: number, clientId: number) => {
   const clientMeks = await db
     .selectFrom("client_master_encryption_key")

src/lib/server/db/migrations/1738409340-AddThumbnail.ts

@@ -0,0 +1,31 @@
+import { Kysely, sql } from "kysely";
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const up = async (db: Kysely<any>) => {
+  // media.ts
+  await db.schema
+    .createTable("thumbnail")
+    .addColumn("id", "integer", (col) => col.primaryKey().generatedAlwaysAsIdentity())
+    .addColumn("directory_id", "integer", (col) =>
+      col.references("directory.id").onDelete("cascade").unique(),
+    )
+    .addColumn("file_id", "integer", (col) =>
+      col.references("file.id").onDelete("cascade").unique(),
+    )
+    .addColumn("category_id", "integer", (col) =>
+      col.references("category.id").onDelete("cascade").unique(),
+    )
+    .addColumn("path", "text", (col) => col.unique().notNull())
+    .addColumn("updated_at", "timestamp(3)", (col) => col.notNull())
+    .addColumn("encrypted_content_iv", "text", (col) => col.notNull())
+    .addCheckConstraint(
+      "thumbnail_ck01",
+      sql`(file_id IS NOT NULL)::integer + (directory_id IS NOT NULL)::integer + (category_id IS NOT NULL)::integer = 1`,
+    )
+    .execute();
+};
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const down = async (db: Kysely<any>) => {
+  await db.schema.dropTable("thumbnail").execute();
+};

src/lib/server/db/migrations/1768062380-AddChunkedUpload.ts

@@ -0,0 +1,63 @@
+import { Kysely, sql } from "kysely";
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const up = async (db: Kysely<any>) => {
+  // file.ts
+  await db.schema
+    .alterTable("file")
+    .alterColumn("encrypted_content_iv", (col) => col.dropNotNull())
+    .execute();
+
+  // media.ts
+  await db.schema
+    .alterTable("thumbnail")
+    .alterColumn("encrypted_content_iv", (col) => col.dropNotNull())
+    .execute();
+
+  // upload.ts
+  await db.schema
+    .createTable("upload_session")
+    .addColumn("id", "uuid", (col) => col.primaryKey())
+    .addColumn("type", "text", (col) => col.notNull())
+    .addColumn("user_id", "integer", (col) => col.references("user.id").notNull())
+    .addColumn("path", "text", (col) => col.notNull())
+    .addColumn("total_chunks", "integer", (col) => col.notNull())
+    .addColumn("uploaded_chunks", sql`integer[]`, (col) => col.notNull().defaultTo(sql`'{}'`))
+    .addColumn("expires_at", "timestamp(3)", (col) => col.notNull())
+    .addColumn("parent_id", "integer", (col) => col.references("directory.id"))
+    .addColumn("master_encryption_key_version", "integer")
+    .addColumn("encrypted_data_encryption_key", "text")
+    .addColumn("data_encryption_key_version", "timestamp(3)")
+    .addColumn("hmac_secret_key_version", "integer")
+    .addColumn("content_type", "text")
+    .addColumn("encrypted_name", "json")
+    .addColumn("encrypted_created_at", "json")
+    .addColumn("encrypted_last_modified_at", "json")
+    .addColumn("file_id", "integer", (col) => col.references("file.id"))
+    .addForeignKeyConstraint(
+      "upload_session_fk01",
+      ["user_id", "master_encryption_key_version"],
+      "master_encryption_key",
+      ["user_id", "version"],
+    )
+    .addForeignKeyConstraint(
+      "upload_session_fk02",
+      ["user_id", "hmac_secret_key_version"],
+      "hmac_secret_key",
+      ["user_id", "version"],
+    )
+    .execute();
+};
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const down = async (db: Kysely<any>) => {
+  await db.schema.dropTable("upload_session").execute();
+  await db.schema
+    .alterTable("thumbnail")
+    .alterColumn("encrypted_content_iv", (col) => col.setNotNull())
+    .execute();
+  await db.schema
+    .alterTable("file")
+    .alterColumn("encrypted_content_iv", (col) => col.setNotNull())
+    .execute();
+};

src/lib/server/db/migrations/index.ts

@@ -1,7 +1,11 @@
 import * as Initial1737357000 from "./1737357000-Initial";
 import * as AddFileCategory1737422340 from "./1737422340-AddFileCategory";
+import * as AddThumbnail1738409340 from "./1738409340-AddThumbnail";
+import * as AddChunkedUpload1768062380 from "./1768062380-AddChunkedUpload";
 
 export default {
   "1737357000-Initial": Initial1737357000,
   "1737422340-AddFileCategory": AddFileCategory1737422340,
+  "1738409340-AddThumbnail": AddThumbnail1738409340,
+  "1768062380-AddChunkedUpload": AddChunkedUpload1768062380,
 };

src/lib/server/db/schema/category.ts

@@ -1,5 +1,5 @@
 import type { Generated } from "kysely";
-import type { Ciphertext } from "./util";
+import type { Ciphertext } from "./utils";
 
 interface CategoryTable {
   id: Generated<number>;

src/lib/server/db/schema/file.ts

@@ -1,5 +1,5 @@
 import type { ColumnType, Generated } from "kysely";
-import type { Ciphertext } from "./util";
+import type { Ciphertext } from "./utils";
 
 interface DirectoryTable {
   id: Generated<number>;
@@ -30,7 +30,7 @@ interface FileTable {
   hmac_secret_key_version: number | null;
   content_hmac: string | null; // Base64
   content_type: string;
-  encrypted_content_iv: string; // Base64
+  encrypted_content_iv: string | null; // Base64
   encrypted_content_hash: string; // Base64
   encrypted_name: Ciphertext;
   encrypted_created_at: Ciphertext | null;

src/lib/server/db/schema/index.ts

@@ -2,10 +2,12 @@ export * from "./category";
 export * from "./client";
 export * from "./file";
 export * from "./hsk";
+export * from "./media";
 export * from "./mek";
 export * from "./session";
+export * from "./upload";
 export * from "./user";
-export * from "./util";
+export * from "./utils";
 
 // eslint-disable-next-line @typescript-eslint/no-empty-object-type
 export interface Database {}

src/lib/server/db/schema/media.ts

@@ -0,0 +1,17 @@
+import type { Generated } from "kysely";
+
+interface ThumbnailTable {
+  id: Generated<number>;
+  directory_id: number | null;
+  file_id: number | null;
+  category_id: number | null;
+  path: string;
+  updated_at: Date;
+  encrypted_content_iv: string | null; // Base64
+}
+
+declare module "./index" {
+  interface Database {
+    thumbnail: ThumbnailTable;
+  }
+}

src/lib/server/db/schema/upload.ts

@@ -0,0 +1,32 @@
+import type { Generated } from "kysely";
+import type { Ciphertext } from "./utils";
+
+interface UploadSessionTable {
+  id: string;
+  type: "file" | "thumbnail";
+  user_id: number;
+  path: string;
+  total_chunks: number;
+  uploaded_chunks: Generated<number[]>;
+  expires_at: Date;
+
+  // For file uploads
+  parent_id: number | null;
+  master_encryption_key_version: number | null;
+  encrypted_data_encryption_key: string | null; // Base64
+  data_encryption_key_version: Date | null;
+  hmac_secret_key_version: number | null;
+  content_type: string | null;
+  encrypted_name: Ciphertext | null;
+  encrypted_created_at: Ciphertext | null;
+  encrypted_last_modified_at: Ciphertext | null;
+
+  // For thumbnail uploads
+  file_id: number | null;
+}
+
+declare module "./index" {
+  interface Database {
+    upload_session: UploadSessionTable;
+  }
+}

src/lib/server/db/session.ts

@@ -5,31 +5,22 @@ import db from "./kysely";
 
 export const createSession = async (
   userId: number,
-  clientId: number | null,
   sessionId: string,
   ip: string | null,
   agent: string | null,
 ) => {
-  try {
   const now = new Date();
   await db
     .insertInto("session")
     .values({
       id: sessionId,
       user_id: userId,
-        client_id: clientId,
       created_at: now,
       last_used_at: now,
       last_used_by_ip: ip || null,
       last_used_by_agent: agent || null,
     })
     .execute();
-  } catch (e) {
-    if (e instanceof pg.DatabaseError && e.code === "23505") {
-      throw new IntegrityError("Session already exists");
-    }
-    throw e;
-  }
 };
 
 export const refreshSession = async (
@@ -55,8 +46,23 @@ export const refreshSession = async (
   return { userId: session.user_id, clientId: session.client_id };
 };
 
-export const upgradeSession = async (sessionId: string, clientId: number) => {
+export const upgradeSession = async (
-  const res = await db
+  userId: number,
+  sessionId: string,
+  clientId: number,
+  force: boolean,
+) => {
+  try {
+    await db.transaction().execute(async (trx) => {
+      if (force) {
+        await trx
+          .deleteFrom("session")
+          .where("id", "!=", sessionId)
+          .where("user_id", "=", userId)
+          .where("client_id", "=", clientId)
+          .execute();
+      }
+      const res = await trx
         .updateTable("session")
         .set({ client_id: clientId })
         .where("id", "=", sessionId)
@@ -65,6 +71,13 @@ export const upgradeSession = async (sessionId: string, clientId: number) => {
       if (res.numUpdatedRows === 0n) {
         throw new IntegrityError("Session not found");
       }
+    });
+  } catch (e) {
+    if (e instanceof pg.DatabaseError && e.code === "23505") {
+      throw new IntegrityError("Session already exists");
+    }
+    throw e;
+  }
 };
 
 export const deleteSession = async (sessionId: string) => {
@@ -94,7 +107,7 @@ export const registerSessionUpgradeChallenge = async (
   expiresAt: Date,
 ) => {
   try {
-    await db
+    const { id } = await db
       .insertInto("session_upgrade_challenge")
       .values({
         session_id: sessionId,
@@ -103,7 +116,9 @@ export const registerSessionUpgradeChallenge = async (
         allowed_ip: allowedIp,
         expires_at: expiresAt,
       })
-      .execute();
+      .returning("id")
+      .executeTakeFirstOrThrow();
+    return { id };
   } catch (e) {
     if (e instanceof pg.DatabaseError && e.code === "23505") {
       throw new IntegrityError("Challenge already registered");
@@ -113,19 +128,19 @@ export const registerSessionUpgradeChallenge = async (
 };
 
 export const consumeSessionUpgradeChallenge = async (
+  challengeId: number,
   sessionId: string,
-  answer: string,
   ip: string,
 ) => {
   const challenge = await db
     .deleteFrom("session_upgrade_challenge")
+    .where("id", "=", challengeId)
     .where("session_id", "=", sessionId)
-    .where("answer", "=", answer)
     .where("allowed_ip", "=", ip)
     .where("expires_at", ">", new Date())
-    .returning("client_id")
+    .returning(["client_id", "answer"])
     .executeTakeFirst();
-  return challenge ? { clientId: challenge.client_id } : null;
+  return challenge ? { clientId: challenge.client_id, answer: challenge.answer } : null;
 };
 
 export const cleanupExpiredSessionUpgradeChallenges = async () => {

src/lib/server/db/upload.ts

@@ -0,0 +1,185 @@
+import { sql } from "kysely";
+import { IntegrityError } from "./error";
+import db from "./kysely";
+import type { Ciphertext } from "./schema";
+
+interface BaseUploadSession {
+  id: string;
+  userId: number;
+  path: string;
+  totalChunks: number;
+  uploadedChunks: number[];
+  expiresAt: Date;
+}
+
+interface FileUploadSession extends BaseUploadSession {
+  type: "file";
+  parentId: DirectoryId;
+  mekVersion: number;
+  encDek: string;
+  dekVersion: Date;
+  hskVersion: number | null;
+  contentType: string;
+  encName: Ciphertext;
+  encCreatedAt: Ciphertext | null;
+  encLastModifiedAt: Ciphertext;
+}
+
+interface ThumbnailUploadSession extends BaseUploadSession {
+  type: "thumbnail";
+  fileId: number;
+  dekVersion: Date;
+}
+
+export const createFileUploadSession = async (
+  params: Omit<FileUploadSession, "type" | "uploadedChunks">,
+) => {
+  await db.transaction().execute(async (trx) => {
+    const mek = await trx
+      .selectFrom("master_encryption_key")
+      .select("version")
+      .where("user_id", "=", params.userId)
+      .where("state", "=", "active")
+      .limit(1)
+      .forUpdate()
+      .executeTakeFirst();
+    if (mek?.version !== params.mekVersion) {
+      throw new IntegrityError("Inactive MEK version");
+    }
+
+    if (params.hskVersion) {
+      const hsk = await trx
+        .selectFrom("hmac_secret_key")
+        .select("version")
+        .where("user_id", "=", params.userId)
+        .where("state", "=", "active")
+        .limit(1)
+        .forUpdate()
+        .executeTakeFirst();
+      if (hsk?.version !== params.hskVersion) {
+        throw new IntegrityError("Inactive HSK version");
+      }
+    }
+
+    await trx
+      .insertInto("upload_session")
+      .values({
+        id: params.id,
+        type: "file",
+        user_id: params.userId,
+        path: params.path,
+        total_chunks: params.totalChunks,
+        expires_at: params.expiresAt,
+        parent_id: params.parentId !== "root" ? params.parentId : null,
+        master_encryption_key_version: params.mekVersion,
+        encrypted_data_encryption_key: params.encDek,
+        data_encryption_key_version: params.dekVersion,
+        hmac_secret_key_version: params.hskVersion,
+        content_type: params.contentType,
+        encrypted_name: params.encName,
+        encrypted_created_at: params.encCreatedAt,
+        encrypted_last_modified_at: params.encLastModifiedAt,
+      })
+      .execute();
+  });
+};
+
+export const createThumbnailUploadSession = async (
+  params: Omit<ThumbnailUploadSession, "type" | "uploadedChunks">,
+) => {
+  await db.transaction().execute(async (trx) => {
+    const file = await trx
+      .selectFrom("file")
+      .select("data_encryption_key_version")
+      .where("id", "=", params.fileId)
+      .where("user_id", "=", params.userId)
+      .limit(1)
+      .forUpdate()
+      .executeTakeFirst();
+    if (!file) {
+      throw new IntegrityError("File not found");
+    } else if (file.data_encryption_key_version.getTime() !== params.dekVersion.getTime()) {
+      throw new IntegrityError("Invalid DEK version");
+    }
+
+    await trx
+      .insertInto("upload_session")
+      .values({
+        id: params.id,
+        type: "thumbnail",
+        user_id: params.userId,
+        path: params.path,
+        total_chunks: params.totalChunks,
+        expires_at: params.expiresAt,
+        file_id: params.fileId,
+        data_encryption_key_version: params.dekVersion,
+      })
+      .execute();
+  });
+};
+
+export const getUploadSession = async (sessionId: string, userId: number) => {
+  const session = await db
+    .selectFrom("upload_session")
+    .selectAll()
+    .where("id", "=", sessionId)
+    .where("user_id", "=", userId)
+    .where("expires_at", ">", new Date())
+    .limit(1)
+    .executeTakeFirst();
+  if (!session) {
+    return null;
+  } else if (session.type === "file") {
+    return {
+      type: "file",
+      id: session.id,
+      userId: session.user_id,
+      path: session.path,
+      totalChunks: session.total_chunks,
+      uploadedChunks: session.uploaded_chunks,
+      expiresAt: session.expires_at,
+      parentId: session.parent_id ?? "root",
+      mekVersion: session.master_encryption_key_version!,
+      encDek: session.encrypted_data_encryption_key!,
+      dekVersion: session.data_encryption_key_version!,
+      hskVersion: session.hmac_secret_key_version,
+      contentType: session.content_type!,
+      encName: session.encrypted_name!,
+      encCreatedAt: session.encrypted_created_at,
+      encLastModifiedAt: session.encrypted_last_modified_at!,
+    } satisfies FileUploadSession;
+  } else {
+    return {
+      type: "thumbnail",
+      id: session.id,
+      userId: session.user_id,
+      path: session.path,
+      totalChunks: session.total_chunks,
+      uploadedChunks: session.uploaded_chunks,
+      expiresAt: session.expires_at,
+      fileId: session.file_id!,
+      dekVersion: session.data_encryption_key_version!,
+    } satisfies ThumbnailUploadSession;
+  }
+};
+
+export const markChunkAsUploaded = async (sessionId: string, chunkIndex: number) => {
+  await db
+    .updateTable("upload_session")
+    .set({ uploaded_chunks: sql`array_append(uploaded_chunks, ${chunkIndex})` })
+    .where("id", "=", sessionId)
+    .execute();
+};
+
+export const deleteUploadSession = async (trx: typeof db, sessionId: string) => {
+  await trx.deleteFrom("upload_session").where("id", "=", sessionId).execute();
+};
+
+export const cleanupExpiredUploadSessions = async () => {
+  const sessions = await db
+    .deleteFrom("upload_session")
+    .where("expires_at", "<=", new Date())
+    .returning("path")
+    .execute();
+  return sessions.map(({ path }) => path);
+};

src/lib/server/db/user.ts

@@ -27,10 +27,6 @@ export const getUserByEmail = async (email: string) => {
   return user ? (user satisfies User) : null;
 };
 
-export const setUserNickname = async (userId: number, nickname: string) => {
-  await db.updateTable("user").set({ nickname }).where("id", "=", userId).execute();
-};
-
 export const setUserPassword = async (userId: number, password: string) => {
   await db.updateTable("user").set({ password }).where("id", "=", userId).execute();
 };

src/lib/server/loadenv.ts

@@ -25,4 +25,6 @@ export default {
     sessionUpgradeExp: ms(env.SESSION_UPGRADE_CHALLENGE_EXPIRES || "5m"),
   },
   libraryPath: env.LIBRARY_PATH || "library",
+  thumbnailsPath: env.THUMBNAILS_PATH || "thumbnails",
+  uploadsPath: env.UPLOADS_PATH || "uploads",
 };

src/lib/server/middlewares/authenticate.ts

@@ -1,12 +1,7 @@
 import { error, redirect, type Handle } from "@sveltejs/kit";
-import { authenticate, AuthenticationError } from "$lib/server/modules/auth";
+import { cookieOptions, authenticate, AuthenticationError } from "$lib/server/modules/auth";
 
 export const authenticateMiddleware: Handle = async ({ event, resolve }) => {
-  const { pathname, search } = event.url;
-  if (pathname === "/api/auth/login") {
-    return await resolve(event);
-  }
-
   try {
     const sessionIdSigned = event.cookies.get("sessionId");
     if (!sessionIdSigned) {
@@ -15,9 +10,11 @@ export const authenticateMiddleware: Handle = async ({ event, resolve }) => {
 
     const { ip, userAgent } = event.locals;
     event.locals.session = await authenticate(sessionIdSigned, ip, userAgent);
+    event.cookies.set("sessionId", sessionIdSigned, cookieOptions);
   } catch (e) {
     if (e instanceof AuthenticationError) {
-      if (pathname === "/auth/login") {
+      const { pathname, search } = event.url;
+      if (pathname === "/auth/login" || pathname.startsWith("/api/trpc")) {
         return await resolve(event);
       } else if (pathname.startsWith("/api")) {
         error(e.status, e.message);

src/lib/server/modules/auth.ts

@@ -1,20 +1,25 @@
 import { error } from "@sveltejs/kit";
-import { getUserClient } from "$lib/server/db/client";
+import { ClientRepo, SessionRepo, IntegrityError } from "$lib/server/db";
-import { IntegrityError } from "$lib/server/db/error";
-import { createSession, refreshSession } from "$lib/server/db/session";
 import env from "$lib/server/loadenv";
-import { issueSessionId, verifySessionId } from "$lib/server/modules/crypto";
+import { verifySessionId } from "$lib/server/modules/crypto";
 
-interface Session {
+export interface Session {
   sessionId: string;
   userId: number;
   clientId?: number;
 }
 
-interface ClientSession extends Session {
+export interface ClientSession extends Session {
   clientId: number;
 }
 
+export type SessionPermission =
+  | "any"
+  | "notClient"
+  | "anyClient"
+  | "pendingClient"
+  | "activeClient";
+
 export class AuthenticationError extends Error {
   constructor(
     public status: 400 | 401,
@@ -25,11 +30,22 @@ export class AuthenticationError extends Error {
   }
 }
 
-export const startSession = async (userId: number, ip: string, userAgent: string) => {
+export class AuthorizationError extends Error {
-  const { sessionId, sessionIdSigned } = await issueSessionId(32, env.session.secret);
+  constructor(
-  await createSession(userId, null, sessionId, ip, userAgent);
+    public status: 403 | 500,
-  return sessionIdSigned;
+    message: string,
-};
+  ) {
+    super(message);
+    this.name = "AuthorizationError";
+  }
+}
+
+export const cookieOptions = {
+  path: "/",
+  maxAge: env.session.exp / 1000,
+  secure: true,
+  sameSite: "strict",
+} as const;
 
 export const authenticate = async (sessionIdSigned: string, ip: string, userAgent: string) => {
   const sessionId = verifySessionId(sessionIdSigned, env.session.secret);
@@ -38,7 +54,7 @@ export const authenticate = async (sessionIdSigned: string, ip: string, userAgen
   }
 
   try {
-    const { userId, clientId } = await refreshSession(sessionId, ip, userAgent);
+    const { userId, clientId } = await SessionRepo.refreshSession(sessionId, ip, userAgent);
     return {
       id: sessionId,
       userId,
@@ -52,34 +68,12 @@ export const authenticate = async (sessionIdSigned: string, ip: string, userAgen
   }
 };
 
-export async function authorize(locals: App.Locals, requiredPermission: "any"): Promise<Session>;
+export const authorizeInternal = async (
-
-export async function authorize(
   locals: App.Locals,
-  requiredPermission: "notClient",
+  requiredPermission: SessionPermission,
-): Promise<Session>;
+): Promise<Session> => {
-
-export async function authorize(
-  locals: App.Locals,
-  requiredPermission: "anyClient",
-): Promise<ClientSession>;
-
-export async function authorize(
-  locals: App.Locals,
-  requiredPermission: "pendingClient",
-): Promise<ClientSession>;
-
-export async function authorize(
-  locals: App.Locals,
-  requiredPermission: "activeClient",
-): Promise<ClientSession>;
-
-export async function authorize(
-  locals: App.Locals,
-  requiredPermission: "any" | "notClient" | "anyClient" | "pendingClient" | "activeClient",
-): Promise<Session> {
   if (!locals.session) {
-    error(500, "Unauthenticated");
+    throw new AuthorizationError(500, "Unauthenticated");
   }
 
   const { id: sessionId, userId, clientId } = locals.session;
@@ -89,39 +83,63 @@ export async function authorize(
       break;
     case "notClient":
       if (clientId) {
-        error(403, "Forbidden");
+        throw new AuthorizationError(403, "Forbidden");
       }
       break;
     case "anyClient":
       if (!clientId) {
-        error(403, "Forbidden");
+        throw new AuthorizationError(403, "Forbidden");
       }
       break;
     case "pendingClient": {
       if (!clientId) {
-        error(403, "Forbidden");
+        throw new AuthorizationError(403, "Forbidden");
       }
-      const userClient = await getUserClient(userId, clientId);
+      const userClient = await ClientRepo.getUserClient(userId, clientId);
       if (!userClient) {
-        error(500, "Invalid session id");
+        throw new AuthorizationError(500, "Invalid session id");
       } else if (userClient.state !== "pending") {
-        error(403, "Forbidden");
+        throw new AuthorizationError(403, "Forbidden");
       }
       break;
     }
     case "activeClient": {
       if (!clientId) {
-        error(403, "Forbidden");
+        throw new AuthorizationError(403, "Forbidden");
       }
-      const userClient = await getUserClient(userId, clientId);
+      const userClient = await ClientRepo.getUserClient(userId, clientId);
       if (!userClient) {
-        error(500, "Invalid session id");
+        throw new AuthorizationError(500, "Invalid session id");
       } else if (userClient.state !== "active") {
-        error(403, "Forbidden");
+        throw new AuthorizationError(403, "Forbidden");
       }
       break;
     }
   }
 
   return { sessionId, userId, clientId };
+};
+
+export async function authorize(
+  locals: App.Locals,
+  requiredPermission: "any" | "notClient",
+): Promise<Session>;
+
+export async function authorize(
+  locals: App.Locals,
+  requiredPermission: "anyClient" | "pendingClient" | "activeClient",
+): Promise<ClientSession>;
+
+export async function authorize(
+  locals: App.Locals,
+  requiredPermission: SessionPermission,
+): Promise<Session> {
+  try {
+    return await authorizeInternal(locals, requiredPermission);
+  } catch (e) {
+    if (e instanceof AuthorizationError) {
+      error(e.status, e.message);
+    }
+    throw e;
+  }
 }

src/lib/server/modules/filesystem.ts

@@ -0,0 +1,13 @@
+import { rm, unlink } from "fs/promises";
+
+export const safeRecursiveRm = async (path: string | null | undefined) => {
+  if (path) {
+    await rm(path, { recursive: true }).catch(console.error);
+  }
+};
+
+export const safeUnlink = async (path: string | null | undefined) => {
+  if (path) {
+    await unlink(path).catch(console.error);
+  }
+};

src/lib/server/modules/mek.ts

@@ -1,25 +0,0 @@
-import { error } from "@sveltejs/kit";
-import { getUserClientWithDetails } from "$lib/server/db/client";
-import { getInitialMek } from "$lib/server/db/mek";
-import { verifySignature } from "$lib/server/modules/crypto";
-
-export const isInitialMekNeeded = async (userId: number) => {
-  const initialMek = await getInitialMek(userId);
-  return !initialMek;
-};
-
-export const verifyClientEncMekSig = async (
-  userId: number,
-  clientId: number,
-  version: number,
-  encMek: string,
-  encMekSig: string,
-) => {
-  const userClient = await getUserClientWithDetails(userId, clientId);
-  if (!userClient) {
-    error(500, "Invalid session id");
-  }
-
-  const data = JSON.stringify({ version, key: encMek });
-  return verifySignature(Buffer.from(data), encMekSig, userClient.sigPubKey);
-};

src/lib/server/schemas/auth.ts

@@ -1,30 +0,0 @@
-import { z } from "zod";
-
-export const passwordChangeRequest = z.object({
-  oldPassword: z.string().trim().nonempty(),
-  newPassword: z.string().trim().nonempty(),
-});
-export type PasswordChangeRequest = z.infer<typeof passwordChangeRequest>;
-
-export const loginRequest = z.object({
-  email: z.string().email(),
-  password: z.string().trim().nonempty(),
-});
-export type LoginRequest = z.infer<typeof loginRequest>;
-
-export const sessionUpgradeRequest = z.object({
-  encPubKey: z.string().base64().nonempty(),
-  sigPubKey: z.string().base64().nonempty(),
-});
-export type SessionUpgradeRequest = z.infer<typeof sessionUpgradeRequest>;
-
-export const sessionUpgradeResponse = z.object({
-  challenge: z.string().base64().nonempty(),
-});
-export type SessionUpgradeResponse = z.infer<typeof sessionUpgradeResponse>;
-
-export const sessionUpgradeVerifyRequest = z.object({
-  answer: z.string().base64().nonempty(),
-  answerSig: z.string().base64().nonempty(),
-});
-export type SessionUpgradeVerifyRequest = z.infer<typeof sessionUpgradeVerifyRequest>;

src/lib/server/schemas/category.ts

@@ -1,55 +0,0 @@
-import { z } from "zod";
-
-export const categoryIdSchema = z.union([z.literal("root"), z.number().int().positive()]);
-
-export const categoryInfoResponse = z.object({
-  metadata: z
-    .object({
-      parent: categoryIdSchema,
-      mekVersion: z.number().int().positive(),
-      dek: z.string().base64().nonempty(),
-      dekVersion: z.string().datetime(),
-      name: z.string().base64().nonempty(),
-      nameIv: z.string().base64().nonempty(),
-    })
-    .optional(),
-  subCategories: z.number().int().positive().array(),
-});
-export type CategoryInfoResponse = z.infer<typeof categoryInfoResponse>;
-
-export const categoryFileAddRequest = z.object({
-  file: z.number().int().positive(),
-});
-export type CategoryFileAddRequest = z.infer<typeof categoryFileAddRequest>;
-
-export const categoryFileListResponse = z.object({
-  files: z.array(
-    z.object({
-      file: z.number().int().positive(),
-      isRecursive: z.boolean(),
-    }),
-  ),
-});
-export type CategoryFileListResponse = z.infer<typeof categoryFileListResponse>;
-
-export const categoryFileRemoveRequest = z.object({
-  file: z.number().int().positive(),
-});
-export type CategoryFileRemoveRequest = z.infer<typeof categoryFileRemoveRequest>;
-
-export const categoryRenameRequest = z.object({
-  dekVersion: z.string().datetime(),
-  name: z.string().base64().nonempty(),
-  nameIv: z.string().base64().nonempty(),
-});
-export type CategoryRenameRequest = z.infer<typeof categoryRenameRequest>;
-
-export const categoryCreateRequest = z.object({
-  parent: categoryIdSchema,
-  mekVersion: z.number().int().positive(),
-  dek: z.string().base64().nonempty(),
-  dekVersion: z.string().datetime(),
-  name: z.string().base64().nonempty(),
-  nameIv: z.string().base64().nonempty(),
-});
-export type CategoryCreateRequest = z.infer<typeof categoryCreateRequest>;

src/lib/server/schemas/client.ts

@@ -1,35 +0,0 @@
-import { z } from "zod";
-
-export const clientListResponse = z.object({
-  clients: z.array(
-    z.object({
-      id: z.number().int().positive(),
-      state: z.enum(["pending", "active"]),
-    }),
-  ),
-});
-export type ClientListResponse = z.infer<typeof clientListResponse>;
-
-export const clientRegisterRequest = z.object({
-  encPubKey: z.string().base64().nonempty(),
-  sigPubKey: z.string().base64().nonempty(),
-});
-export type ClientRegisterRequest = z.infer<typeof clientRegisterRequest>;
-
-export const clientRegisterResponse = z.object({
-  challenge: z.string().base64().nonempty(),
-});
-export type ClientRegisterResponse = z.infer<typeof clientRegisterResponse>;
-
-export const clientRegisterVerifyRequest = z.object({
-  answer: z.string().base64().nonempty(),
-  answerSig: z.string().base64().nonempty(),
-});
-export type ClientRegisterVerifyRequest = z.infer<typeof clientRegisterVerifyRequest>;
-
-export const clientStatusResponse = z.object({
-  id: z.number().int().positive(),
-  state: z.enum(["pending", "active"]),
-  isInitialMekNeeded: z.boolean(),
-});
-export type ClientStatusResponse = z.infer<typeof clientStatusResponse>;

src/lib/server/schemas/directory.ts

@@ -1,41 +0,0 @@
-import { z } from "zod";
-
-export const directoryIdSchema = z.union([z.literal("root"), z.number().int().positive()]);
-
-export const directoryInfoResponse = z.object({
-  metadata: z
-    .object({
-      parent: directoryIdSchema,
-      mekVersion: z.number().int().positive(),
-      dek: z.string().base64().nonempty(),
-      dekVersion: z.string().datetime(),
-      name: z.string().base64().nonempty(),
-      nameIv: z.string().base64().nonempty(),
-    })
-    .optional(),
-  subDirectories: z.number().int().positive().array(),
-  files: z.number().int().positive().array(),
-});
-export type DirectoryInfoResponse = z.infer<typeof directoryInfoResponse>;
-
-export const directoryDeleteResponse = z.object({
-  deletedFiles: z.number().int().positive().array(),
-});
-export type DirectoryDeleteResponse = z.infer<typeof directoryDeleteResponse>;
-
-export const directoryRenameRequest = z.object({
-  dekVersion: z.string().datetime(),
-  name: z.string().base64().nonempty(),
-  nameIv: z.string().base64().nonempty(),
-});
-export type DirectoryRenameRequest = z.infer<typeof directoryRenameRequest>;
-
-export const directoryCreateRequest = z.object({
-  parent: directoryIdSchema,
-  mekVersion: z.number().int().positive(),
-  dek: z.string().base64().nonempty(),
-  dekVersion: z.string().datetime(),
-  name: z.string().base64().nonempty(),
-  nameIv: z.string().base64().nonempty(),
-});
-export type DirectoryCreateRequest = z.infer<typeof directoryCreateRequest>;

src/lib/server/schemas/file.ts

@@ -1,69 +0,0 @@
-import mime from "mime";
-import { z } from "zod";
-import { directoryIdSchema } from "./directory";
-
-export const fileInfoResponse = z.object({
-  parent: directoryIdSchema,
-  mekVersion: z.number().int().positive(),
-  dek: z.string().base64().nonempty(),
-  dekVersion: z.string().datetime(),
-  contentType: z
-    .string()
-    .trim()
-    .nonempty()
-    .refine((value) => mime.getExtension(value) !== null), // MIME type
-  contentIv: z.string().base64().nonempty(),
-  name: z.string().base64().nonempty(),
-  nameIv: z.string().base64().nonempty(),
-  createdAt: z.string().base64().nonempty().optional(),
-  createdAtIv: z.string().base64().nonempty().optional(),
-  lastModifiedAt: z.string().base64().nonempty(),
-  lastModifiedAtIv: z.string().base64().nonempty(),
-  categories: z.number().int().positive().array(),
-});
-export type FileInfoResponse = z.infer<typeof fileInfoResponse>;
-
-export const fileRenameRequest = z.object({
-  dekVersion: z.string().datetime(),
-  name: z.string().base64().nonempty(),
-  nameIv: z.string().base64().nonempty(),
-});
-export type FileRenameRequest = z.infer<typeof fileRenameRequest>;
-
-export const duplicateFileScanRequest = z.object({
-  hskVersion: z.number().int().positive(),
-  contentHmac: z.string().base64().nonempty(),
-});
-export type DuplicateFileScanRequest = z.infer<typeof duplicateFileScanRequest>;
-
-export const duplicateFileScanResponse = z.object({
-  files: z.number().int().positive().array(),
-});
-export type DuplicateFileScanResponse = z.infer<typeof duplicateFileScanResponse>;
-
-export const fileUploadRequest = z.object({
-  parent: directoryIdSchema,
-  mekVersion: z.number().int().positive(),
-  dek: z.string().base64().nonempty(),
-  dekVersion: z.string().datetime(),
-  hskVersion: z.number().int().positive(),
-  contentHmac: z.string().base64().nonempty(),
-  contentType: z
-    .string()
-    .trim()
-    .nonempty()
-    .refine((value) => mime.getExtension(value) !== null), // MIME type
-  contentIv: z.string().base64().nonempty(),
-  name: z.string().base64().nonempty(),
-  nameIv: z.string().base64().nonempty(),
-  createdAt: z.string().base64().nonempty().optional(),
-  createdAtIv: z.string().base64().nonempty().optional(),
-  lastModifiedAt: z.string().base64().nonempty(),
-  lastModifiedAtIv: z.string().base64().nonempty(),
-});
-export type FileUploadRequest = z.infer<typeof fileUploadRequest>;
-
-export const fileUploadResponse = z.object({
-  file: z.number().int().positive(),
-});
-export type FileUploadResponse = z.infer<typeof fileUploadResponse>;

src/lib/server/schemas/hsk.ts

@@ -1,19 +0,0 @@
-import { z } from "zod";
-
-export const hmacSecretListResponse = z.object({
-  hsks: z.array(
-    z.object({
-      version: z.number().int().positive(),
-      state: z.enum(["active"]),
-      mekVersion: z.number().int().positive(),
-      hsk: z.string().base64().nonempty(),
-    }),
-  ),
-});
-export type HmacSecretListResponse = z.infer<typeof hmacSecretListResponse>;
-
-export const initialHmacSecretRegisterRequest = z.object({
-  mekVersion: z.number().int().positive(),
-  hsk: z.string().base64().nonempty(),
-});
-export type InitialHmacSecretRegisterRequest = z.infer<typeof initialHmacSecretRegisterRequest>;

src/lib/server/schemas/index.ts

@@ -1,8 +0,0 @@
-export * from "./auth";
-export * from "./category";
-export * from "./client";
-export * from "./directory";
-export * from "./file";
-export * from "./hsk";
-export * from "./mek";
-export * from "./user";

src/lib/server/schemas/mek.ts

@@ -1,19 +0,0 @@
-import { z } from "zod";
-
-export const masterKeyListResponse = z.object({
-  meks: z.array(
-    z.object({
-      version: z.number().int().positive(),
-      state: z.enum(["active", "retired"]),
-      mek: z.string().base64().nonempty(),
-      mekSig: z.string().base64().nonempty(),
-    }),
-  ),
-});
-export type MasterKeyListResponse = z.infer<typeof masterKeyListResponse>;
-
-export const initialMasterKeyRegisterRequest = z.object({
-  mek: z.string().base64().nonempty(),
-  mekSig: z.string().base64().nonempty(),
-});
-export type InitialMasterKeyRegisterRequest = z.infer<typeof initialMasterKeyRegisterRequest>;

src/lib/server/schemas/user.ts

@@ -1,12 +0,0 @@
-import { z } from "zod";
-
-export const userInfoResponse = z.object({
-  email: z.string().email(),
-  nickname: z.string().nonempty(),
-});
-export type UserInfoResponse = z.infer<typeof userInfoResponse>;
-
-export const nicknameChangeRequest = z.object({
-  newNickname: z.string().trim().min(2).max(8),
-});
-export type NicknameChangeRequest = z.infer<typeof nicknameChangeRequest>;

src/lib/server/services/auth.ts

@@ -1,121 +0,0 @@
-import { error } from "@sveltejs/kit";
-import argon2 from "argon2";
-import { getClient, getClientByPubKeys, getUserClient } from "$lib/server/db/client";
-import { IntegrityError } from "$lib/server/db/error";
-import {
-  upgradeSession,
-  deleteSession,
-  deleteAllOtherSessions,
-  registerSessionUpgradeChallenge,
-  consumeSessionUpgradeChallenge,
-} from "$lib/server/db/session";
-import { getUser, getUserByEmail, setUserPassword } from "$lib/server/db/user";
-import env from "$lib/server/loadenv";
-import { startSession } from "$lib/server/modules/auth";
-import { verifySignature, generateChallenge } from "$lib/server/modules/crypto";
-
-const hashPassword = async (password: string) => {
-  return await argon2.hash(password);
-};
-
-const verifyPassword = async (hash: string, password: string) => {
-  return await argon2.verify(hash, password);
-};
-
-export const changePassword = async (
-  userId: number,
-  sessionId: string,
-  oldPassword: string,
-  newPassword: string,
-) => {
-  if (oldPassword === newPassword) {
-    error(400, "Same passwords");
-  } else if (newPassword.length < 8) {
-    error(400, "Too short password");
-  }
-
-  const user = await getUser(userId);
-  if (!user) {
-    error(500, "Invalid session id");
-  } else if (!(await verifyPassword(user.password, oldPassword))) {
-    error(403, "Invalid password");
-  }
-
-  await setUserPassword(userId, await hashPassword(newPassword));
-  await deleteAllOtherSessions(userId, sessionId);
-};
-
-export const login = async (email: string, password: string, ip: string, userAgent: string) => {
-  const user = await getUserByEmail(email);
-  if (!user || !(await verifyPassword(user.password, password))) {
-    error(401, "Invalid email or password");
-  }
-
-  try {
-    return { sessionIdSigned: await startSession(user.id, ip, userAgent) };
-  } catch (e) {
-    if (e instanceof IntegrityError && e.message === "Session already exists") {
-      error(403, "Already logged in");
-    }
-    throw e;
-  }
-};
-
-export const logout = async (sessionId: string) => {
-  await deleteSession(sessionId);
-};
-
-export const createSessionUpgradeChallenge = async (
-  sessionId: string,
-  userId: number,
-  ip: string,
-  encPubKey: string,
-  sigPubKey: string,
-) => {
-  const client = await getClientByPubKeys(encPubKey, sigPubKey);
-  const userClient = client ? await getUserClient(userId, client.id) : undefined;
-  if (!client) {
-    error(401, "Invalid public key(s)");
-  } else if (!userClient || userClient.state === "challenging") {
-    error(403, "Unregistered client");
-  }
-
-  const { answer, challenge } = await generateChallenge(32, encPubKey);
-  await registerSessionUpgradeChallenge(
-    sessionId,
-    client.id,
-    answer.toString("base64"),
-    ip,
-    new Date(Date.now() + env.challenge.sessionUpgradeExp),
-  );
-
-  return { challenge: challenge.toString("base64") };
-};
-
-export const verifySessionUpgradeChallenge = async (
-  sessionId: string,
-  ip: string,
-  answer: string,
-  answerSig: string,
-) => {
-  const challenge = await consumeSessionUpgradeChallenge(sessionId, answer, ip);
-  if (!challenge) {
-    error(403, "Invalid challenge answer");
-  }
-
-  const client = await getClient(challenge.clientId);
-  if (!client) {
-    error(500, "Invalid challenge answer");
-  } else if (!verifySignature(Buffer.from(answer, "base64"), answerSig, client.sigPubKey)) {
-    error(403, "Invalid challenge answer signature");
-  }
-
-  try {
-    await upgradeSession(sessionId, client.id);
-  } catch (e) {
-    if (e instanceof IntegrityError && e.message === "Session not found") {
-      error(500, "Invalid challenge answer");
-    }
-    throw e;
-  }
-};

src/lib/server/services/category.ts

@@ -1,133 +0,0 @@
-import { error } from "@sveltejs/kit";
-import {
-  registerCategory,
-  getAllCategoriesByParent,
-  getCategory,
-  setCategoryEncName,
-  unregisterCategory,
-  type CategoryId,
-  type NewCategory,
-} from "$lib/server/db/category";
-import { IntegrityError } from "$lib/server/db/error";
-import {
-  getAllFilesByCategory,
-  getFile,
-  addFileToCategory,
-  removeFileFromCategory,
-} from "$lib/server/db/file";
-import type { Ciphertext } from "$lib/server/db/schema";
-
-export const getCategoryInformation = async (userId: number, categoryId: CategoryId) => {
-  const category = categoryId !== "root" ? await getCategory(userId, categoryId) : undefined;
-  if (category === null) {
-    error(404, "Invalid category id");
-  }
-
-  const categories = await getAllCategoriesByParent(userId, categoryId);
-  return {
-    metadata: category && {
-      parentId: category.parentId ?? ("root" as const),
-      mekVersion: category.mekVersion,
-      encDek: category.encDek,
-      dekVersion: category.dekVersion,
-      encName: category.encName,
-    },
-    categories: categories.map(({ id }) => id),
-  };
-};
-
-export const deleteCategory = async (userId: number, categoryId: number) => {
-  try {
-    await unregisterCategory(userId, categoryId);
-  } catch (e) {
-    if (e instanceof IntegrityError && e.message === "Category not found") {
-      error(404, "Invalid category id");
-    }
-    throw e;
-  }
-};
-
-export const addCategoryFile = async (userId: number, categoryId: number, fileId: number) => {
-  const category = await getCategory(userId, categoryId);
-  const file = await getFile(userId, fileId);
-  if (!category) {
-    error(404, "Invalid category id");
-  } else if (!file) {
-    error(404, "Invalid file id");
-  }
-
-  try {
-    await addFileToCategory(fileId, categoryId);
-  } catch (e) {
-    if (e instanceof IntegrityError && e.message === "File already added to category") {
-      error(400, "File already added");
-    }
-    throw e;
-  }
-};
-
-export const getCategoryFiles = async (userId: number, categoryId: number, recurse: boolean) => {
-  const category = await getCategory(userId, categoryId);
-  if (!category) {
-    error(404, "Invalid category id");
-  }
-
-  const files = await getAllFilesByCategory(userId, categoryId, recurse);
-  return { files };
-};
-
-export const removeCategoryFile = async (userId: number, categoryId: number, fileId: number) => {
-  const category = await getCategory(userId, categoryId);
-  const file = await getFile(userId, fileId);
-  if (!category) {
-    error(404, "Invalid category id");
-  } else if (!file) {
-    error(404, "Invalid file id");
-  }
-
-  try {
-    await removeFileFromCategory(fileId, categoryId);
-  } catch (e) {
-    if (e instanceof IntegrityError && e.message === "File not found in category") {
-      error(400, "File not added");
-    }
-    throw e;
-  }
-};
-
-export const renameCategory = async (
-  userId: number,
-  categoryId: number,
-  dekVersion: Date,
-  newEncName: Ciphertext,
-) => {
-  try {
-    await setCategoryEncName(userId, categoryId, dekVersion, newEncName);
-  } catch (e) {
-    if (e instanceof IntegrityError) {
-      if (e.message === "Category not found") {
-        error(404, "Invalid category id");
-      } else if (e.message === "Invalid DEK version") {
-        error(400, "Invalid DEK version");
-      }
-    }
-    throw e;
-  }
-};
-
-export const createCategory = async (params: NewCategory) => {
-  const oneMinuteAgo = new Date(Date.now() - 60 * 1000);
-  const oneMinuteLater = new Date(Date.now() + 60 * 1000);
-  if (params.dekVersion <= oneMinuteAgo || params.dekVersion >= oneMinuteLater) {
-    error(400, "Invalid DEK version");
-  }
-
-  try {
-    await registerCategory(params);
-  } catch (e) {
-    if (e instanceof IntegrityError && e.message === "Inactive MEK version") {
-      error(400, "Inactive MEK version");
-    }
-    throw e;
-  }
-};

src/lib/server/services/client.ts

@@ -1,108 +0,0 @@
-import { error } from "@sveltejs/kit";
-import {
-  createClient,
-  getClient,
-  getClientByPubKeys,
-  createUserClient,
-  getAllUserClients,
-  getUserClient,
-  setUserClientStateToPending,
-  registerUserClientChallenge,
-  consumeUserClientChallenge,
-} from "$lib/server/db/client";
-import { IntegrityError } from "$lib/server/db/error";
-import { verifyPubKey, verifySignature, generateChallenge } from "$lib/server/modules/crypto";
-import { isInitialMekNeeded } from "$lib/server/modules/mek";
-import env from "$lib/server/loadenv";
-
-export const getUserClientList = async (userId: number) => {
-  const userClients = await getAllUserClients(userId);
-  return {
-    userClients: userClients.map(({ clientId, state }) => ({
-      id: clientId,
-      state: state as "pending" | "active",
-    })),
-  };
-};
-
-const expiresAt = () => new Date(Date.now() + env.challenge.userClientExp);
-
-const createUserClientChallenge = async (
-  ip: string,
-  userId: number,
-  clientId: number,
-  encPubKey: string,
-) => {
-  const { answer, challenge } = await generateChallenge(32, encPubKey);
-  await registerUserClientChallenge(userId, clientId, answer.toString("base64"), ip, expiresAt());
-  return challenge.toString("base64");
-};
-
-export const registerUserClient = async (
-  userId: number,
-  ip: string,
-  encPubKey: string,
-  sigPubKey: string,
-) => {
-  const client = await getClientByPubKeys(encPubKey, sigPubKey);
-  if (client) {
-    try {
-      await createUserClient(userId, client.id);
-      return { challenge: await createUserClientChallenge(ip, userId, client.id, encPubKey) };
-    } catch (e) {
-      if (e instanceof IntegrityError && e.message === "User client already exists") {
-        error(409, "Client already registered");
-      }
-      throw e;
-    }
-  } else {
-    if (encPubKey === sigPubKey) {
-      error(400, "Same public keys");
-    } else if (!verifyPubKey(encPubKey) || !verifyPubKey(sigPubKey)) {
-      error(400, "Invalid public key(s)");
-    }
-
-    try {
-      const { id: clientId } = await createClient(encPubKey, sigPubKey, userId);
-      return { challenge: await createUserClientChallenge(ip, userId, clientId, encPubKey) };
-    } catch (e) {
-      if (e instanceof IntegrityError && e.message === "Public key(s) already registered") {
-        error(409, "Public key(s) already used");
-      }
-      throw e;
-    }
-  }
-};
-
-export const verifyUserClient = async (
-  userId: number,
-  ip: string,
-  answer: string,
-  answerSig: string,
-) => {
-  const challenge = await consumeUserClientChallenge(userId, answer, ip);
-  if (!challenge) {
-    error(403, "Invalid challenge answer");
-  }
-
-  const client = await getClient(challenge.clientId);
-  if (!client) {
-    error(500, "Invalid challenge answer");
-  } else if (!verifySignature(Buffer.from(answer, "base64"), answerSig, client.sigPubKey)) {
-    error(403, "Invalid challenge answer signature");
-  }
-
-  await setUserClientStateToPending(userId, client.id);
-};
-
-export const getUserClientStatus = async (userId: number, clientId: number) => {
-  const userClient = await getUserClient(userId, clientId);
-  if (!userClient) {
-    error(500, "Invalid session id");
-  }
-
-  return {
-    state: userClient.state as "pending" | "active",
-    isInitialMekNeeded: await isInitialMekNeeded(userId),
-  };
-};