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Check the backup info against the stored private key when determining trust. (#2167)

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This commit is contained in:
Hubert Chathi
2022-02-10 08:34:21 -05:00
committed by GitHub
parent ea0eaff212
commit 47c5c4645e
1 changed files with 17 additions and 4 deletions
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19
src/crypto/backup.ts
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@@ -313,12 +313,25 @@ export class BackupManager {
return ret;
}
const trustedPubkey = this.baseApis.crypto.sessionStore.getLocalTrustedBackupPubKey();
const privKey = await this.baseApis.crypto.getSessionBackupPrivateKey();
if (privKey) {
let algorithm;
try {
algorithm = await BackupManager.makeAlgorithm(backupInfo, async () => privKey);
if ("public_key" in backupInfo.auth_data && backupInfo.auth_data.public_key === trustedPubkey) {
logger.info("Backup public key " + trustedPubkey + " is trusted locally");
if (await algorithm.keyMatches(privKey)) {
logger.info("Backup is trusted locally");
ret.trusted_locally = true;
}
} catch {
// do nothing -- if we have an error, then we don't mark it as
// locally trusted
} finally {
if (algorithm) {
algorithm.free();
}
}
}
const mySigs = backupInfo.auth_data.signatures[this.baseApis.getUserId()] || {};