/// <summary>
/// Public and secret key provider.
/// </summary>
/// <param name="publicKey">The public key data.</param>
/// <param name="secretKey">The secret key data.</param>
/// <param name="keyID">The unique key id of the public secret key pair.</param>
/// <param name="password">The password used to protect the secret key.</param>
/// <returns>The RSA cryto service provider.</returns>
public RSACryptoServiceProvider PublicKeySecretKeyProvider(System.IO.Stream publicKey, System.IO.Stream secretKey, long keyID, string password = null)
{
// Read the public key data.
Key.Bcpg.OpenPgp.PgpPublicKey pgpPublicKey = ReadPublicKey(publicKey);
// Find the secret key
Key.Bcpg.OpenPgp.PgpPrivateKey privateKey = null;
Key.Bcpg.OpenPgp.PgpSecretKeyRingBundle secretKeyRingBundle =
new Key.Bcpg.OpenPgp.PgpSecretKeyRingBundle(Key.Bcpg.OpenPgp.PgpUtilities.GetDecoderStream(secretKey));
// Find the private key (secret key).
privateKey = FindSecretKey(secretKeyRingBundle, keyID, password.ToArray());
// Assign the rsa parameters.
RSAParameters rsaPrivateParam = new RSAParameters();
Key.Crypto.Parameters.RsaKeyParameters rsaPrivatePublic = (Key.Crypto.Parameters.RsaKeyParameters)pgpPublicKey.GetKey();
Key.Crypto.Parameters.RsaPrivateCrtKeyParameters rsaCrtPrivateParam = (Key.Crypto.Parameters.RsaPrivateCrtKeyParameters)privateKey.Key;
// Assign the rsa parameters.
rsaPrivateParam.D = rsaCrtPrivateParam.Exponent.ToByteArrayUnsigned();
rsaPrivateParam.DP = rsaCrtPrivateParam.DP.ToByteArrayUnsigned();
rsaPrivateParam.DQ = rsaCrtPrivateParam.DQ.ToByteArrayUnsigned();
rsaPrivateParam.InverseQ = rsaCrtPrivateParam.QInv.ToByteArrayUnsigned();
rsaPrivateParam.P = rsaCrtPrivateParam.P.ToByteArrayUnsigned();
rsaPrivateParam.Q = rsaCrtPrivateParam.Q.ToByteArrayUnsigned();
rsaPrivateParam.Modulus = rsaPrivatePublic.Modulus.ToByteArrayUnsigned();
rsaPrivateParam.Exponent = rsaPrivatePublic.Exponent.ToByteArrayUnsigned();
// Create the encyption provider.
RSACryptoServiceProvider rsaEncryptProvider = new RSACryptoServiceProvider();
rsaEncryptProvider.ImportParameters(rsaPrivateParam);
// Return the rsa provider.
return(rsaEncryptProvider);
}
/// <summary>
/// Load the secret key from the stream.
/// </summary>
/// <param name="secretKey">The stream containing the secret key.</param>
/// <param name="keyID">The unique key id of the public secret key pair.</param>
/// <param name="password">The password used to protect the secret key.</param>
/// <returns>The secret key.</returns>
public Openpgp.SecretKey LoadSecretKey(System.IO.Stream secretKey, long keyID, string password = null)
{
Openpgp.SecretKey secretKeyContainer = new SecretKey();
// Find the secret key
Key.Bcpg.OpenPgp.PgpPrivateKey privateKey = null;
Key.Bcpg.OpenPgp.PgpSecretKeyRingBundle secretKeyRingBundle =
new Key.Bcpg.OpenPgp.PgpSecretKeyRingBundle(Key.Bcpg.OpenPgp.PgpUtilities.GetDecoderStream(secretKey));
// Find the private key (secret key).
Key.Bcpg.OpenPgp.PgpSecretKey pgpSecretKey = secretKeyRingBundle.GetSecretKey(keyID);
privateKey = Openpgp.PublicPrivateKey.FindSecretKey(secretKeyRingBundle, keyID, password.ToArray());
// Assign the secret key data.
secretKeyContainer.PgpSecretKey = pgpSecretKey;
secretKeyContainer.PgpPrivateKey = privateKey;
secretKeyContainer.KeyId = pgpSecretKey.KeyId;
secretKeyContainer.IsMasterKey = pgpSecretKey.IsMasterKey;
secretKeyContainer.IsSigningKey = pgpSecretKey.IsSigningKey;
secretKeyContainer.KeyEncryptionAlgorithm = Openpgp.PublicSecretKey.GetSymmetricKeyAlgorithmType(pgpSecretKey.KeyEncryptionAlgorithm);
// Return the secret key.
return(secretKeyContainer);
}
/// <summary>
/// Computes the hash value of the specified input stream using the specified
/// hash algorithm, and signs the resulting hash value.
/// </summary>
/// <param name="inputStream">The input data for which to compute the hash.</param>
/// <param name="rsaProvider">The RSA crypto service provider.</param>
/// <param name="keyID">The unique key id of the public secret key pair.</param>
/// <param name="hashAlgorithm">The hash algorithm to use to create the hash value.</param>
/// <returns>The signature for the specified data.</returns>
public byte[] SignData(Stream inputStream, RSACryptoServiceProvider rsaProvider, long keyID, Nequeo.Cryptography.HashcodeType hashAlgorithm = HashcodeType.SHA512)
{
MemoryStream output = null;
Key.Bcpg.BcpgOutputStream pgpOutput = null;
try
{
int ch;
output = new MemoryStream();
// Export the signer private key parameters.
RSAParameters rsaPrivateKeySignerParam = rsaProvider.ExportParameters(true);
Key.Crypto.Parameters.RsaPrivateCrtKeyParameters rsaPrivateKeySigner =
new Key.Crypto.Parameters.RsaPrivateCrtKeyParameters(
new Key.Math.BigInteger(1, rsaPrivateKeySignerParam.Modulus),
new Key.Math.BigInteger(1, rsaPrivateKeySignerParam.Exponent),
new Key.Math.BigInteger(1, rsaPrivateKeySignerParam.D),
new Key.Math.BigInteger(1, rsaPrivateKeySignerParam.P),
new Key.Math.BigInteger(1, rsaPrivateKeySignerParam.Q),
new Key.Math.BigInteger(1, rsaPrivateKeySignerParam.DP),
new Key.Math.BigInteger(1, rsaPrivateKeySignerParam.DQ),
new Key.Math.BigInteger(1, rsaPrivateKeySignerParam.InverseQ)
);
// Get the private key.
Key.Bcpg.OpenPgp.PgpPrivateKey privateKey = new Key.Bcpg.OpenPgp.PgpPrivateKey(rsaPrivateKeySigner, keyID);
// Create a signature generator.
Key.Bcpg.OpenPgp.PgpSignatureGenerator signatureGenerator =
new Key.Bcpg.OpenPgp.PgpSignatureGenerator(Key.Bcpg.PublicKeyAlgorithmTag.RsaGeneral, GetHashAlgorithm(hashAlgorithm));
signatureGenerator.InitSign(Key.Bcpg.OpenPgp.PgpSignature.BinaryDocument, privateKey);
// Create the output stream.
pgpOutput = new Key.Bcpg.BcpgOutputStream(output);
// Read the input stream.
while ((ch = inputStream.ReadByte()) >= 0)
{
// Update the generator.
signatureGenerator.Update((byte)ch);
}
// Write the hash to the output stream.
Key.Bcpg.OpenPgp.PgpSignature signature = signatureGenerator.Generate();
signature.Encode(pgpOutput);
// Return the signed value.
return(output.ToArray());
}
catch (Exception)
{
throw;
}
finally
{
if (output != null)
{
output.Close();
}
if (pgpOutput != null)
{
pgpOutput.Close();
}
}
}
/// <summary>
/// Decrypt the stream.
/// </summary>
/// <param name="decrypted">The stream containing the decrypted data.</param>
/// <param name="input">The data to decrypt.</param>
/// <param name="secretKey">The secret key used for decryption.</param>
/// <param name="password">The password used to protect the secret key.</param>
/// <returns>Returns null if no integrity packet exists; false if message failed integrity check; true if message integrity check passed.</returns>
public bool?Decrypt(System.IO.Stream decrypted, System.IO.Stream input, System.IO.Stream secretKey, string password)
{
// Get decorder stream.
input = Key.Bcpg.OpenPgp.PgpUtilities.GetDecoderStream(input);
System.IO.Stream clear = null;
System.IO.Stream unc = null;
try
{
// Load the encrypted input stream.
Key.Bcpg.OpenPgp.PgpEncryptedDataList encryptedDataList = null;
Key.Bcpg.OpenPgp.PgpObjectFactory objectFactory = new Key.Bcpg.OpenPgp.PgpObjectFactory(input);
Key.Bcpg.OpenPgp.PgpObject o = objectFactory.NextPgpObject();
// The first object might be a PGP marker packet.
if (o is Key.Bcpg.OpenPgp.PgpEncryptedDataList)
{
// Get the data list.
encryptedDataList = (Key.Bcpg.OpenPgp.PgpEncryptedDataList)o;
}
else
{
// Get the next object.
encryptedDataList = (Key.Bcpg.OpenPgp.PgpEncryptedDataList)objectFactory.NextPgpObject();
}
// Find the secret key
Key.Bcpg.OpenPgp.PgpPrivateKey privateKey = null;
Key.Bcpg.OpenPgp.PgpPublicKeyEncryptedData publicKeyEncryptedData = null;
Key.Bcpg.OpenPgp.PgpSecretKeyRingBundle secretKeyRingBundle = new Key.Bcpg.OpenPgp.PgpSecretKeyRingBundle(Key.Bcpg.OpenPgp.PgpUtilities.GetDecoderStream(secretKey));
// For each object find the secret key.
foreach (Key.Bcpg.OpenPgp.PgpPublicKeyEncryptedData pked in encryptedDataList.GetEncryptedDataObjects())
{
// Find the private key (secret key).
privateKey = FindSecretKey(secretKeyRingBundle, pked.KeyId, password.ToArray());
// If the private key exists.
if (privateKey != null)
{
// This is the private key.
publicKeyEncryptedData = pked;
break;
}
}
// If a private key was not found.
if (privateKey == null)
{
throw new ArgumentException("secret key for message not found.");
}
// Get the data stream.
clear = publicKeyEncryptedData.GetDataStream(privateKey);
// Get the key message.
Key.Bcpg.OpenPgp.PgpObjectFactory plainFact = new Key.Bcpg.OpenPgp.PgpObjectFactory(clear);
Key.Bcpg.OpenPgp.PgpObject message = plainFact.NextPgpObject();
// If message is compressed.
if (message is Key.Bcpg.OpenPgp.PgpCompressedData)
{
// Decompress the message.
Key.Bcpg.OpenPgp.PgpCompressedData cData = (Key.Bcpg.OpenPgp.PgpCompressedData)message;
Key.Bcpg.OpenPgp.PgpObjectFactory pgpFact = new Key.Bcpg.OpenPgp.PgpObjectFactory(cData.GetDataStream());
message = pgpFact.NextPgpObject();
}
// If the message is literal data.
if (message is Key.Bcpg.OpenPgp.PgpLiteralData)
{
Key.Bcpg.OpenPgp.PgpLiteralData ld = (Key.Bcpg.OpenPgp.PgpLiteralData)message;
// Get the file name of the embedded encrypted file.
string outFileName = ld.FileName;
// Write the ecrypted data file to the decrypted stream.
unc = ld.GetInputStream();
Key.Utilities.IO.Streams.PipeAll(unc, decrypted);
}
else if (message is Key.Bcpg.OpenPgp.PgpOnePassSignatureList)
{
throw new Exception("encrypted message contains a signed message - not literal data.");
}
else
{
throw new Exception("message is not a simple encrypted file - type unknown.");
}
// If the ecrypted file contains an integrity packet associated with it.
if (publicKeyEncryptedData.IsIntegrityProtected())
{
// If it has been verified.
if (!publicKeyEncryptedData.Verify())
{
// Message failed integrity check.
return(false);
}
else
{
// Message integrity check passed.
return(true);
}
}
// No integrity packet exists.
return(null);
}
catch (Exception)
{
throw;
}
finally
{
if (clear != null)
{
clear.Close();
}
if (unc != null)
{
unc.Close();
}
}
}
