private static PgpPublicKeyEncryptedData extractPublicKey(PgpEncryptedDataList encryptedDataList)
{
PgpPublicKeyEncryptedData publicKeyED = null;
foreach (PgpPublicKeyEncryptedData privateKeyED in encryptedDataList.GetEncryptedDataObjects())
{
if (privateKeyED != null)
{
publicKeyED = privateKeyED;
break;
}
}
return publicKeyED;
}
/// <summary>
/// Gets the encrypted data stream by locating the private key from the secret keyring.
/// </summary>
/// <param name="encryptedDataList">The encrypted data list.</param>
/// <returns></returns>
/// <exception cref="System.ArgumentNullException">encryptedDataList</exception>
/// <exception cref="Org.BouncyCastle.Bcpg.OpenPgp.PgpException">data integrity compromised
/// or
/// no secret key for any message found.</exception>
private Stream GetEncryptedDataStream(PgpEncryptedDataList encryptedDataList)
{
if (encryptedDataList == null) throw new ArgumentNullException("encryptedDataList");
// Iterate through encrypted data objects until we find one we have a secret key for
foreach (var encryptedDataObject in encryptedDataList.GetEncryptedDataObjects().Cast<PgpPublicKeyEncryptedData>())
{
if (encryptedDataObject.IsIntegrityProtected() && !encryptedDataObject.Verify())
throw new PgpException("Data integrity compromised.");
var secretKey = _secretKeyRingBundle.GetSecretKey(encryptedDataObject.KeyId);
if (secretKey == null) continue;
var privateKey = secretKey.ExtractPrivateKey(_passPhraseChars);
return encryptedDataObject.GetDataStream(privateKey);
}
throw new PgpException("No secret key found for any encrypted content.");
}