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Update hashing

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This commit is contained in:
Andras Schmelczer 2026-03-28 12:07:44 +00:00
parent 65d75dec40
commit 1c6cd80b64
3 changed files with 9 additions and 14 deletions
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2
frontend/sync-client/src/sync-operations/syncer.ts
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@ -348,7 +348,7 @@ export class Syncer {
try { try {
const contentBytes = const contentBytes =
await this.operations.read(relativePath); // this can throw FileNotFoundError await this.operations.read(relativePath); // this can throw FileNotFoundError
return hash(contentBytes); return await hash(contentBytes);
} catch (e) { } catch (e) {
if ( if (
e instanceof Error && e instanceof Error &&

6
frontend/sync-client/src/sync-operations/unrestricted-syncer.ts
View file

@ -101,7 +101,7 @@ export class UnrestrictedSyncer {
const contentBytes = await this.operations.read( const contentBytes = await this.operations.read(
document.relativePath document.relativePath
); // this can throw FileNotFoundError ); // this can throw FileNotFoundError
const contentHash = hash(contentBytes); const contentHash = await hash(contentBytes);
let response: DocumentVersion | DocumentUpdateResponse | undefined = let response: DocumentVersion | DocumentUpdateResponse | undefined =
undefined; undefined;
@ -342,7 +342,7 @@ export class UnrestrictedSyncer {
{ {
documentId: remoteVersion.documentId, documentId: remoteVersion.documentId,
parentVersionId: remoteVersion.vaultUpdateId, parentVersionId: remoteVersion.vaultUpdateId,
hash: hash(contentBytes), hash: await hash(contentBytes),
remoteRelativePath: remoteVersion.relativePath remoteRelativePath: remoteVersion.relativePath
}, },
this.database.createNewPendingDocument( this.database.createNewPendingDocument(
@ -513,7 +513,7 @@ export class UnrestrictedSyncer {
if (!("type" in response) || response.type === "MergingUpdate") { if (!("type" in response) || response.type === "MergingUpdate") {
const responseBytes = base64ToBytes(response.contentBase64); const responseBytes = base64ToBytes(response.contentBase64);
contentHash = hash(responseBytes); contentHash = await hash(responseBytes);
this.database.updateDocumentMetadata( this.database.updateDocumentMetadata(
{ {

15
frontend/sync-client/src/utils/hash.ts
View file

@ -1,12 +1,7 @@
// https://stackoverflow.com/questions/7616461/generate-a-hash-from-string-in-javascript export async function hash(content: Uint8Array): Promise<string> {
export function hash(content: Uint8Array): string { const digest = await crypto.subtle.digest("SHA-256", content);
let result = 0; const bytes = new Uint8Array(digest);
// eslint-disable-next-line @typescript-eslint/prefer-for-of return Array.from(bytes, (b) => b.toString(16).padStart(2, "0")).join("");
for (let i = 0; i < content.length; i++) {
result = (result << 5) - result + content[i];
result |= 0; // Convert to 32bit integer
}
return Math.abs(result).toString(16).padStart(8, "0");
} }
export const EMPTY_HASH = hash(new Uint8Array(0)); export const EMPTY_HASH = await hash(new Uint8Array(0));