파일 생성 시각 및 파일 마지막 수정 시각을 저장하도록 변경

파일 마지막 수정 시각은 반드시 지정되어야 하며, 파일 시스템에서 읽어옵니다. 파일 생성 시각은 선택적으로 지정될 수 있으며, 이미지일 경우 EXIF에서 추출을 시도합니다. 두 값 모두 클라이언트에서 암호화되어 서버에 저장됩니다.

src/lib/modules/file.ts

@@ -53,6 +53,10 @@ export const getDirectoryInfo = (directoryId: "root" | number, masterKey: Crypto
   return info;
 };
 
+const decryptDate = async (ciphertext: string, iv: string, dataKey: CryptoKey) => {
+  return new Date(parseInt(await decryptString(ciphertext, iv, dataKey), 10));
+};
+
 const fetchFileInfo = async (
   fileId: number,
   masterKey: CryptoKey,
@@ -70,6 +74,11 @@ const fetchFileInfo = async (
     contentType: metadata.contentType,
     contentIv: metadata.contentIv,
     name: await decryptString(metadata.name, metadata.nameIv, dataKey),
+    createdAt:
+      metadata.createdAt && metadata.createdAtIv
+        ? await decryptDate(metadata.createdAt, metadata.createdAtIv, dataKey)
+        : undefined,
+    lastModifiedAt: await decryptDate(metadata.lastModifiedAt, metadata.lastModifiedAtIv, dataKey),
   };
 
   infoStore.update(() => newInfo);

src/lib/server/db/file.ts

@@ -28,6 +28,10 @@ export interface NewFileParams {
   encContentIv: string;
   encName: string;
   encNameIv: string;
+  encCreatedAt: string | null;
+  encCreatedAtIv: string | null;
+  encLastModifiedAt: string;
+  encLastModifiedAtIv: string;
 }
 
 export const registerDirectory = async (params: NewDirectoryParams) => {
@@ -154,7 +158,12 @@ export const unregisterDirectory = async (userId: number, directoryId: number) =
 };
 
 export const registerFile = async (params: NewFileParams) => {
-  if ((params.hskVersion && !params.contentHmac) || (!params.hskVersion && params.contentHmac)) {
+  if (
+    (params.hskVersion && !params.contentHmac) ||
+    (!params.hskVersion && params.contentHmac) ||
+    (params.encCreatedAt && !params.encCreatedAtIv) ||
+    (!params.encCreatedAt && params.encCreatedAtIv)
+  ) {
     throw new Error("Invalid arguments");
   }
 
@@ -194,6 +203,14 @@ export const registerFile = async (params: NewFileParams) => {
           dekVersion: params.dekVersion,
           encContentIv: params.encContentIv,
           encName: { ciphertext: params.encName, iv: params.encNameIv },
+          encCreatedAt:
+            params.encCreatedAt && params.encCreatedAtIv
+              ? { ciphertext: params.encCreatedAt, iv: params.encCreatedAtIv }
+              : null,
+          encLastModifiedAt: {
+            ciphertext: params.encLastModifiedAt,
+            iv: params.encLastModifiedAtIv,
+          },
         })
         .returning({ id: file.id });
       const { id: fileId } = newFiles[0]!;

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

@@ -61,6 +61,8 @@ export const file = sqliteTable(
     contentType: text("content_type").notNull(),
     encContentIv: text("encrypted_content_iv").notNull(), // Base64
     encName: ciphertext("encrypted_name").notNull(),
+    encCreatedAt: ciphertext("encrypted_created_at"),
+    encLastModifiedAt: ciphertext("encrypted_last_modified_at").notNull(),
   },
   (t) => ({
     ref1: foreignKey({

src/lib/server/schemas/file.ts

@@ -12,6 +12,10 @@ export const fileInfoResponse = z.object({
   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 FileInfoResponse = z.infer<typeof fileInfoResponse>;
 
@@ -47,5 +51,9 @@ export const fileUploadRequest = z.object({
   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>;

src/lib/server/services/file.ts

@@ -28,6 +28,8 @@ export const getFileInformation = async (userId: number, fileId: number) => {
     contentType: file.contentType,
     encContentIv: file.encContentIv,
     encName: file.encName,
+    encCreatedAt: file.encCreatedAt,
+    encLastModifiedAt: file.encLastModifiedAt,
   };
 };
 

src/lib/stores/file.ts

@@ -25,7 +25,10 @@ export interface FileInfo {
   contentType: string;
   contentIv: string;
   name: string;
+  createdAt?: Date;
+  lastModifiedAt: Date;
 }
 
 export const directoryInfoStore = new Map<"root" | number, Writable<DirectoryInfo | null>>();
+
 export const fileInfoStore = new Map<number, Writable<FileInfo | null>>();