Function decryptFile

src/modules/pgpModel.js:510–540

({encryptedFile, unlockKey, uiLogSource})

 * @return {Object<data, signatures, filename>} - data as JS binary string
 */
export async function decryptFile({encryptedFile, unlockKey, uiLogSource}) {
  let armoredMessage;
  let binaryMessage;
  try {
    const content = dataURL2str(encryptedFile.content);
    if (/^-----BEGIN PGP MESSAGE-----/.test(content)) {
      armoredMessage = content;
    } else {
      binaryMessage = str2Uint8Array(content);
    }
    const message = await readMessage({armoredMessage, binaryMessage});
    const encryptionKeyIds = message.getEncryptionKeyIDs();
    const keyring = await getKeyringWithPrivKey(encryptionKeyIds);
    if (!keyring) {
      throw noKeyFoundError(encryptionKeyIds);
    }
    const result = await keyring.getPgpBackend().decrypt({base64: () => dataURL2base64(encryptedFile.content), message, keyring, unlockKey: options => unlockKey({message, ...options}), encryptionKeyIds, format: 'binary'});
    await logDecryption(uiLogSource, keyring, encryptionKeyIds);
    if (!result.filename) {
      result.filename = encryptedFile.name.slice(0, -4);
    }
    const sigKeyIds = result.signatures.map(sig => sig.fingerprint || sig.keyId);
    // sync public keys for the signatures
    await syncPublicKeys({keyring, keyIds: sigKeyIds});
    await addSignatureDetails({signatures: result.signatures, keyring});
    return result;
  } catch (error) {
    console.log('pgpModel.decryptFile() error', error);
    throw error;
  }
}