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Element-R: implement {get,store}SessionBackupPrivateKey (#3622)

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This commit is contained in:
Richard van der Hoff
2023-07-26 12:00:43 +01:00
committed by GitHub
parent 29b815b678
commit 0e95df5dba
6 changed files with 75 additions and 10 deletions
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27
src/rust-crypto/rust-crypto.ts
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@@ -698,6 +698,33 @@ export class RustCrypto extends TypedEventEmitter<RustCryptoEvents, RustCryptoEv
return new RustVerificationRequest(request, this.outgoingRequestProcessor, this._supportedVerificationMethods);
}
/**
* Fetch the backup decryption key we have saved in our store.
*
* Implementation of {@link CryptoApi#getSessionBackupPrivateKey}.
*
* @returns the key, if any, or null
*/
public async getSessionBackupPrivateKey(): Promise<Uint8Array | null> {
const backupKeys: RustSdkCryptoJs.BackupKeys = await this.olmMachine.getBackupKeys();
if (!backupKeys.decryptionKeyBase64) return null;
return Buffer.from(backupKeys.decryptionKeyBase64, "base64");
}
/**
* Store the backup decryption key.
*
* Implementation of {@link CryptoApi#storeSessionBackupPrivateKey}.
*
* @param key - the backup decryption key
*/
public async storeSessionBackupPrivateKey(key: Uint8Array): Promise<void> {
const base64Key = Buffer.from(key).toString("base64");
// TODO get version from backupManager
await this.olmMachine.saveBackupDecryptionKey(RustSdkCryptoJs.BackupDecryptionKey.fromBase64(base64Key), "");
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
// SyncCryptoCallbacks implementation