프론트엔드에서의 파일 업로드 임시 구현

src/routes/(main)/directory/[[id]]/service.ts

@@ -7,8 +7,14 @@ import {
   unwrapDataKey,
   encryptData,
   decryptData,
+  digestMessage,
+  signRequestBody,
 } from "$lib/modules/crypto";
-import type { DirectroyInfoResponse, DirectoryCreateRequest } from "$lib/server/schemas";
+import type {
+  DirectroyInfoResponse,
+  DirectoryCreateRequest,
+  FileUploadRequest,
+} from "$lib/server/schemas";
 import type { MasterKey } from "$lib/stores";
 
 export const decryptDirectroyMetadata = async (
@@ -43,3 +49,38 @@ export const requestDirectroyCreation = async (
     signKey,
   );
 };
+
+export const requestFileUpload = async (
+  file: File,
+  parentId: "root" | number,
+  masterKey: MasterKey,
+  signKey: CryptoKey,
+) => {
+  const { dataKey } = await generateDataKey();
+  const fileEncrypted = await encryptData(await file.arrayBuffer(), dataKey);
+  const fileEncryptedHash = await digestMessage(fileEncrypted.ciphertext);
+  const nameEncrypted = await encryptData(new TextEncoder().encode(file.name), dataKey);
+
+  const form = new FormData();
+  form.set(
+    "metadata",
+    await signRequestBody<FileUploadRequest>(
+      {
+        parentId,
+        mekVersion: masterKey.version,
+        dek: await wrapDataKey(dataKey, masterKey.key),
+        contentHash: encodeToBase64(fileEncryptedHash),
+        contentIv: fileEncrypted.iv,
+        name: encodeToBase64(nameEncrypted.ciphertext),
+        nameIv: nameEncrypted.iv,
+      },
+      signKey,
+    ),
+  );
+  form.set("content", new Blob([fileEncrypted.ciphertext]));
+
+  // TODO: Progress, Scheduling, ...
+  const xhr = new XMLHttpRequest();
+  xhr.open("POST", "/api/file/upload");
+  xhr.send(form);
+};