Examples with MissingDecryptionMethodException org.pgpainless.exception.MissingDecryptionMethodException used on opensource projects

Example 1 with MissingDecryptionMethodException

use of org.pgpainless.exception.MissingDecryptionMethodException in project Smack by igniterealtime.

the class SecretKeyBackupHelper method restoreSecretKeyBackup.

/**
 * Decrypt a secret key backup and return the {@link PGPSecretKeyRing} contained in it.
 * TODO: Return a PGPSecretKeyRingCollection instead?
 *
 * @param backup encrypted {@link SecretkeyElement} containing the backup
 * @param backupCode passphrase for decrypting the {@link SecretkeyElement}.
 * @return the TODO javadoc me please
 * @throws InvalidBackupCodeException in case the provided backup code is invalid.
 * @throws IOException IO is dangerous.
 * @throws PGPException PGP is brittle.
 */
public static PGPSecretKeyRing restoreSecretKeyBackup(SecretkeyElement backup, OpenPgpSecretKeyBackupPassphrase backupCode) throws InvalidBackupCodeException, IOException, PGPException {
    byte[] encrypted = Base64.decode(backup.getB64Data());
    InputStream encryptedIn = new ByteArrayInputStream(encrypted);
    ByteArrayOutputStream plaintextOut = new ByteArrayOutputStream();
    try {
        DecryptionStream decryptionStream = PGPainless.decryptAndOrVerify().onInputStream(encryptedIn).withOptions(new ConsumerOptions().addDecryptionPassphrase(Passphrase.fromPassword(backupCode.toString())));
        Streams.pipeAll(decryptionStream, plaintextOut);
        decryptionStream.close();
    } catch (MissingDecryptionMethodException e) {
        throw new InvalidBackupCodeException("Could not decrypt secret key backup. Possibly wrong passphrase?", e);
    }
    byte[] decrypted = plaintextOut.toByteArray();
    return PGPainless.readKeyRing().secretKeyRing(decrypted);
}