/// <summary>
/// Attempt to encrypt a message using PGP with the specified public key(s).
/// </summary>
/// <param name="messageStream">Stream containing the message to encrypt.</param>
/// <param name="encryptedMessageStream">Stream to write the encrypted message into.</param>
/// <param name="fileName">File name of for the message.</param>
/// <param name="recipientPublicKeys">Collection of BouncyCastle public keys to be used for encryption.</param>
/// <param name="symmetricKeyAlgorithmTag">The symmetric key algorithm tag to use for encryption.</param>
/// <param name="armor">Whether to wrap the message with ASCII armor.</param>
/// <returns>Whether the encryption completed successfully.</returns>
public static bool Encrypt(Stream messageStream, Stream encryptedMessageStream, string fileName, IEnumerable<PgpPublicKey> recipientPublicKeys, SymmetricKeyAlgorithmTag symmetricKeyAlgorithmTag = SymmetricKeyAlgorithmTag.TripleDes, bool armor = true)
{
// Allow any of the corresponding keys to be used for decryption.
PgpEncryptedDataGenerator encryptedDataGenerator = new PgpEncryptedDataGenerator(symmetricKeyAlgorithmTag, true, new SecureRandom());
foreach (PgpPublicKey publicKey in recipientPublicKeys)
{
encryptedDataGenerator.AddMethod(publicKey);
}
// Handle optional ASCII armor.
if (armor)
{
using (Stream armoredStream = new ArmoredOutputStream(encryptedMessageStream))
{
using (Stream encryptedStream = encryptedDataGenerator.Open(armoredStream, new byte[Constants.LARGEBUFFERSIZE]))
{
PgpCompressedDataGenerator compressedDataGenerator = new PgpCompressedDataGenerator(CompressionAlgorithmTag.Uncompressed);
using (Stream compressedStream = compressedDataGenerator.Open(encryptedStream))
{
PgpLiteralDataGenerator literalDataGenerator = new PgpLiteralDataGenerator();
using (Stream literalDataStream = literalDataGenerator.Open(encryptedStream, PgpLiteralData.Binary, fileName, DateTime.Now, new byte[Constants.LARGEBUFFERSIZE]))
{
messageStream.Seek(0, SeekOrigin.Begin);
messageStream.CopyTo(literalDataStream);
}
}
}
}
}
else
{
using (Stream encryptedStream = encryptedDataGenerator.Open(encryptedMessageStream, new byte[Constants.LARGEBUFFERSIZE]))
{
PgpCompressedDataGenerator compressedDataGenerator = new PgpCompressedDataGenerator(CompressionAlgorithmTag.Uncompressed);
using (Stream compressedStream = compressedDataGenerator.Open(encryptedStream))
{
PgpLiteralDataGenerator literalDataGenerator = new PgpLiteralDataGenerator();
using (Stream literalDataStream = literalDataGenerator.Open(encryptedStream, PgpLiteralData.Binary, fileName, DateTime.Now, new byte[Constants.LARGEBUFFERSIZE]))
{
messageStream.Seek(0, SeekOrigin.Begin);
messageStream.CopyTo(literalDataStream);
}
}
}
}
return true;
}
/// <summary>
/// Attempt to encrypt a message using PGP with the specified public key(s).
/// </summary>
/// <param name="messageStream">Stream containing the message to encrypt.</param>
/// <param name="fileName">File name of for the message.</param>
/// <param name="signedAndEncryptedMessageStream">Stream to write the encrypted message into.</param>
/// <param name="senderPublicKey">The BouncyCastle public key associated with the signature.</param>
/// <param name="senderPrivateKey">The BouncyCastle private key to be used for signing.</param>
/// <param name="recipientPublicKeys">Collection of BouncyCastle public keys to be used for encryption.</param>
/// <param name="hashAlgorithmTag">The hash algorithm tag to use for signing.</param>
/// <param name="symmetricKeyAlgorithmTag">The symmetric key algorithm tag to use for encryption.</param>
/// <param name="armor">Whether to wrap the message with ASCII armor.</param>
/// <returns>Whether the encryption completed successfully.</returns>
public static bool SignAndEncrypt(Stream messageStream, string fileName, Stream signedAndEncryptedMessageStream, PgpPublicKey senderPublicKey, PgpPrivateKey senderPrivateKey, IEnumerable<PgpPublicKey> recipientPublicKeys, HashAlgorithmTag hashAlgorithmTag = HashAlgorithmTag.Sha256, SymmetricKeyAlgorithmTag symmetricKeyAlgorithmTag = SymmetricKeyAlgorithmTag.TripleDes, bool armor = true)
{
// Create a signature generator.
PgpSignatureGenerator signatureGenerator = new PgpSignatureGenerator(senderPublicKey.Algorithm, hashAlgorithmTag);
signatureGenerator.InitSign(PgpSignature.BinaryDocument, senderPrivateKey);
// Add the public key user ID.
foreach (string userId in senderPublicKey.GetUserIds())
{
PgpSignatureSubpacketGenerator signatureSubGenerator = new PgpSignatureSubpacketGenerator();
signatureSubGenerator.SetSignerUserId(false, userId);
signatureGenerator.SetHashedSubpackets(signatureSubGenerator.Generate());
break;
}
// Allow any of the corresponding keys to be used for decryption.
PgpEncryptedDataGenerator encryptedDataGenerator = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.TripleDes, true, new SecureRandom());
foreach (PgpPublicKey publicKey in recipientPublicKeys)
{
encryptedDataGenerator.AddMethod(publicKey);
}
// Handle optional ASCII armor.
if (armor)
{
using (Stream armoredStream = new ArmoredOutputStream(signedAndEncryptedMessageStream))
{
using (Stream encryptedStream = encryptedDataGenerator.Open(armoredStream, new byte[Constants.LARGEBUFFERSIZE]))
{
PgpCompressedDataGenerator compressedDataGenerator = new PgpCompressedDataGenerator(CompressionAlgorithmTag.Uncompressed);
using (Stream compressedStream = compressedDataGenerator.Open(encryptedStream))
{
signatureGenerator.GenerateOnePassVersion(false).Encode(compressedStream);
PgpLiteralDataGenerator literalDataGenerator = new PgpLiteralDataGenerator();
using (Stream literalStream = literalDataGenerator.Open(compressedStream, PgpLiteralData.Binary,
fileName, DateTime.Now, new byte[Constants.LARGEBUFFERSIZE]))
{
// Process each character in the message.
int messageChar;
while ((messageChar = messageStream.ReadByte()) >= 0)
{
literalStream.WriteByte((byte)messageChar);
signatureGenerator.Update((byte)messageChar);
}
}
signatureGenerator.Generate().Encode(compressedStream);
}
}
}
}
else
{
using (Stream encryptedStream = encryptedDataGenerator.Open(signedAndEncryptedMessageStream, new byte[Constants.LARGEBUFFERSIZE]))
{
PgpCompressedDataGenerator compressedDataGenerator = new PgpCompressedDataGenerator(CompressionAlgorithmTag.Uncompressed);
using (Stream compressedStream = compressedDataGenerator.Open(encryptedStream))
{
signatureGenerator.GenerateOnePassVersion(false).Encode(compressedStream);
PgpLiteralDataGenerator literalDataGenerator = new PgpLiteralDataGenerator();
using (Stream literalStream = literalDataGenerator.Open(compressedStream, PgpLiteralData.Binary,
fileName, DateTime.Now, new byte[Constants.LARGEBUFFERSIZE]))
{
// Process each character in the message.
int messageChar;
while ((messageChar = messageStream.ReadByte()) >= 0)
{
literalStream.WriteByte((byte)messageChar);
signatureGenerator.Update((byte)messageChar);
}
}
signatureGenerator.Generate().Encode(compressedStream);
}
}
}
return true;
}
/// <summary>
/// 加密并签名
/// 使用接受方的公钥进行加密
/// 使用发送方的私钥进行签名
/// 先压缩，再加密，再签名
/// </summary>
/// <param name="kp"></param>
/// <param name="cfg"></param>
/// <param name="inputFile"></param>
/// <param name="outputStream">普通的stream,或者Org.BouncyCastle.Bcpg.ArmoredOutputStream（如果使用加密文件使用ASCII）</param>
public static void EncryptAndSign(System.IO.FileInfo inputFile, System.IO.Stream outputStream, GpgKeyPair kp, GpgEncryptSignCfg cfg)
{
var sr = new Org.BouncyCastle.Security.SecureRandom();
var pgpEncryptedDataGenerator = new Org.BouncyCastle.Bcpg.OpenPgp.PgpEncryptedDataGenerator(cfg.SymmetricKeyAlgorithmTag, cfg.IntegrityProtected, sr);
pgpEncryptedDataGenerator.AddMethod(kp.PublickKey);
var pgpCompressedDataGenerator = new Org.BouncyCastle.Bcpg.OpenPgp.PgpCompressedDataGenerator(cfg.CompressionAlgorithmTag);
var pgpLiteralDataGenerator = new Org.BouncyCastle.Bcpg.OpenPgp.PgpLiteralDataGenerator();
using (var fs = inputFile.OpenRead())
using (var outputStreamEncrypted = pgpEncryptedDataGenerator.Open(outputStream, new byte[cfg.BufferSize]))
using (var outputStreamEncryptedCompressed = pgpCompressedDataGenerator.Open(outputStreamEncrypted))
using (var outputStreamEncryptedCompressedLiteral = pgpLiteralDataGenerator.Open(outputStreamEncryptedCompressed,
Org.BouncyCastle.Bcpg.OpenPgp.PgpLiteralData.Binary, inputFile.Name, inputFile.Length, inputFile.LastWriteTime))
{
var pgpSignatureGenerator = new Org.BouncyCastle.Bcpg.OpenPgp.PgpSignatureGenerator(kp.PrivateKeySecreted.PublicKey.Algorithm,
Org.BouncyCastle.Bcpg.HashAlgorithmTag.Sha256);
pgpSignatureGenerator.InitSign(Org.BouncyCastle.Bcpg.OpenPgp.PgpSignature.BinaryDocument, kp.PrivateKey);
var userId = kp.PrivateKeySecreted.PublicKey.GetUserIds().Cast <string>().First();
var pgpSignatureSubpacketGenerator = new Org.BouncyCastle.Bcpg.OpenPgp.PgpSignatureSubpacketGenerator();
pgpSignatureSubpacketGenerator.SetSignerUserId(cfg.IsCritical, userId);
pgpSignatureGenerator.SetHashedSubpackets(pgpSignatureSubpacketGenerator.Generate());
pgpSignatureGenerator.GenerateOnePassVersion(cfg.IsNested).Encode(outputStreamEncryptedCompressedLiteral);
int dataLenght = 0;
var buffer = new byte[cfg.BufferSize];
while ((dataLenght = fs.Read(buffer, 0, buffer.Length)) > 0)
{
outputStreamEncryptedCompressedLiteral.Write(buffer, 0, dataLenght);
pgpSignatureGenerator.Update(buffer, 0, dataLenght);
}
pgpSignatureGenerator.Generate().Encode(outputStreamEncryptedCompressedLiteral);
}
}
public static Stream PgpEncrypt(this Stream toEncrypt, PgpPublicKey encryptionKey, bool armor = true, bool verify = false)
{
var outStream = new MemoryStream();
var encryptor = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.Cast5, verify, new SecureRandom());
var literalizer = new PgpLiteralDataGenerator();
var compressor = new PgpCompressedDataGenerator(CompressionAlgorithmTag.Zip);
encryptor.AddMethod(encryptionKey);
//it would be nice if these streams were read/write, and supported seeking. Since they are not,
//we need to shunt the data to a read/write stream so that we can control the flow of data as we go.
using (var stream = new MemoryStream()) // this is the read/write stream
using (var armoredStream = armor ? new ArmoredOutputStream(stream) : stream as Stream)
using (var compressedStream = compressor.Open(armoredStream))
{
//data is encrypted first, then compressed, but because of the one-way nature of these streams,
//other "interim" streams are required. The raw data is encapsulated in a "Literal" PGP object.
var rawData = toEncrypt.ReadFully();
var buffer = new byte[1024];
using (var literalOut = new MemoryStream())
using (var literalStream = literalizer.Open(literalOut, PgpLiteralData.Binary, "STREAM", DateTime.UtcNow, buffer))
{
literalStream.Write(rawData, 0, rawData.Length);
literalStream.Close();
var literalData = literalOut.ReadFully();
//The literal data object is then encrypted, which flows into the compressing stream and
//(optionally) into the ASCII armoring stream.
using (var encryptedStream = encryptor.Open(compressedStream, literalData.Length))
{
encryptedStream.Write(literalData, 0, literalData.Length);
encryptedStream.Close();
compressedStream.Close();
armoredStream.Close();
//the stream processes are now complete, and our read/write stream is now populated with
//encrypted data. Convert the stream to a byte array and write to the out stream.
stream.Position = 0;
var data = stream.ReadFully();
outStream.Write(data, 0, data.Length);
}
}
}
outStream.Position = 0;
return outStream;
}
private const int BufferSize = 0x10000; // should always be power of 2
#region Encrypt
/// <summary>
/// Encrypts the file.
/// </summary>
/// <param name="inputFile">The input file.</param>
/// <param name="outputFile">The output file.</param>
/// <param name="publicKeyFile">The public key file.</param>
/// <param name="armor">if set to <c>true</c> [armor].</param>
/// <param name="withIntegrityCheck">if set to <c>true</c> [with integrity check].</param>
public static void EncryptFile(string inputFile, string outputFile, string publicKeyFile, bool armor, bool withIntegrityCheck)
{
try
{
using (Stream publicKeyStream = File.OpenRead(publicKeyFile))
{
PgpPublicKey encKey = ReadPublicKey(publicKeyStream);
using (MemoryStream bOut = new MemoryStream())
{
PgpCompressedDataGenerator comData = new PgpCompressedDataGenerator(CompressionAlgorithmTag.Zip);
PgpUtilities.WriteFileToLiteralData(comData.Open(bOut), PgpLiteralData.Binary, new FileInfo(inputFile));
comData.Close();
PgpEncryptedDataGenerator cPk = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.Cast5, withIntegrityCheck, new SecureRandom());
cPk.AddMethod(encKey);
byte[] bytes = bOut.ToArray();
using (Stream outputStream = File.Create(outputFile))
{
if (armor)
{
using (ArmoredOutputStream armoredStream = new ArmoredOutputStream(outputStream))
{
using (Stream cOut = cPk.Open(armoredStream, bytes.Length))
{
cOut.Write(bytes, 0, bytes.Length);
}
}
}
else
{
using (Stream cOut = cPk.Open(outputStream, bytes.Length))
{
cOut.Write(bytes, 0, bytes.Length);
}
}
}
}
}
}
catch (PgpException e)
{
throw e;
}
}
private static void EncryptFile(Stream outputStream, string fileName, PgpPublicKey encKey, bool armor, bool withIntegrityCheck)
{
if (armor)
outputStream = new ArmoredOutputStream(outputStream);
try
{
MemoryStream bOut = new MemoryStream();
PgpCompressedDataGenerator comData = new PgpCompressedDataGenerator(
CompressionAlgorithmTag.Zip);
PgpUtilities.WriteFileToLiteralData(
comData.Open(bOut),
PgpLiteralData.Binary,
new FileInfo(fileName));
comData.Close();
PgpEncryptedDataGenerator cPk = new PgpEncryptedDataGenerator(
SymmetricKeyAlgorithmTag.Cast5, withIntegrityCheck, new SecureRandom());
cPk.AddMethod(encKey);
byte[] bytes = bOut.ToArray();
Stream cOut = cPk.Open(outputStream, bytes.Length);
cOut.Write(bytes, 0, bytes.Length);
cOut.Close();
if (armor)
outputStream.Close();
}
catch (PgpException e)
{
Console.Error.WriteLine(e);
Exception underlyingException = e.InnerException;
if (underlyingException != null)
{
Console.Error.WriteLine(underlyingException.Message);
Console.Error.WriteLine(underlyingException.StackTrace);
}
}
}
/// <summary>
/// 加密文件
/// 使用接收方的公钥加密文件
/// 先压缩，再加密，
/// </summary>
/// <param name="inputFile"></param>
/// <param name="outputStream">普通的stream,或者Org.BouncyCastle.Bcpg.ArmoredOutputStream（如果使用加密文件使用ASCII）</param>
/// <param name="pubKey"></param>
/// <param name="cfg"></param>
public static void Encrypt(System.IO.FileInfo inputFile, System.IO.Stream outputStream, System.IO.Stream publickKeyStream, GpgEncryptSignCfg cfg)
{
var sr = new Org.BouncyCastle.Security.SecureRandom();
var pgpEncryptedDataGenerator = new Org.BouncyCastle.Bcpg.OpenPgp.PgpEncryptedDataGenerator(cfg.SymmetricKeyAlgorithmTag, cfg.IntegrityProtected, sr);
var pubKey = GpgKeyPair.ReadPublicKey(publickKeyStream);
pgpEncryptedDataGenerator.AddMethod(pubKey);
var pgpCompressedDataGenerator = new Org.BouncyCastle.Bcpg.OpenPgp.PgpCompressedDataGenerator(cfg.CompressionAlgorithmTag);
var pgpLiteralDataGenerator = new Org.BouncyCastle.Bcpg.OpenPgp.PgpLiteralDataGenerator();
using (var fs = inputFile.OpenRead())
using (var outputStreamEncrypted = pgpEncryptedDataGenerator.Open(outputStream, new byte[cfg.BufferSize]))
using (var outputStreamEncryptedCompressed = pgpCompressedDataGenerator.Open(outputStreamEncrypted))
using (var outputStreamEncryptedCompressedLiteral = pgpLiteralDataGenerator.Open(outputStreamEncryptedCompressed,
Org.BouncyCastle.Bcpg.OpenPgp.PgpLiteralData.Binary, inputFile.Name, inputFile.Length, inputFile.LastWriteTime))
{
int dataLenght = 0;
var buffer = new byte[cfg.BufferSize];
while ((dataLenght = fs.Read(buffer, 0, buffer.Length)) > 0)
{
outputStreamEncryptedCompressedLiteral.Write(buffer, 0, dataLenght);
}
}
}
/// <summary>
/// Encrypt string using a PGP public key
/// </summary>
/// <param name="plain">plain text to encrypt</param>
/// <param name="armoredPublicKey">public key in ASCII "-----BEGIN PGP PUBLIC KEY BLOCK----- .. -----END PGP PUBLIC KEY BLOCK-----" format</param>
/// <returns>PGP message string</returns>
public static string PGPEncrypt(string plain, string armoredPublicKey)
{
// encode data
byte[] data = Encoding.UTF8.GetBytes(plain);
// create the WinAuth public key
PgpPublicKey publicKey = null;
using (MemoryStream ms = new MemoryStream(Encoding.ASCII.GetBytes(armoredPublicKey)))
{
using (Stream dis = PgpUtilities.GetDecoderStream(ms))
{
PgpPublicKeyRingBundle bundle = new PgpPublicKeyRingBundle(dis);
foreach (PgpPublicKeyRing keyring in bundle.GetKeyRings())
{
foreach (PgpPublicKey key in keyring.GetPublicKeys())
{
if (key.IsEncryptionKey == true && key.IsRevoked() == false)
{
publicKey = key;
break;
}
}
}
}
}
// encrypt the data using PGP
using (MemoryStream encryptedStream = new MemoryStream())
{
using (ArmoredOutputStream armored = new ArmoredOutputStream(encryptedStream))
{
PgpEncryptedDataGenerator pedg = new PgpEncryptedDataGenerator(Org.BouncyCastle.Bcpg.SymmetricKeyAlgorithmTag.Cast5, true, new Org.BouncyCastle.Security.SecureRandom());
pedg.AddMethod(publicKey);
using (Stream pedgStream = pedg.Open(armored, new byte[4096]))
{
PgpCompressedDataGenerator pcdg = new PgpCompressedDataGenerator(Org.BouncyCastle.Bcpg.CompressionAlgorithmTag.Zip);
using (Stream pcdgStream = pcdg.Open(pedgStream))
{
PgpLiteralDataGenerator pldg = new PgpLiteralDataGenerator();
using (Stream encrypter = pldg.Open(pcdgStream, PgpLiteralData.Binary, "", (long)data.Length, DateTime.Now))
{
encrypter.Write(data, 0, data.Length);
}
}
}
}
return Encoding.ASCII.GetString(encryptedStream.ToArray());
}
}
private PgpEncryptedDataGenerator createEncryptedDataGenerator()
{
PgpEncryptedDataGenerator encryptedDataGenerator = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.TripleDes,
false,
new SecureRandom());
encryptedDataGenerator.AddMethod(this.publicKeyForEncryption);
return encryptedDataGenerator;
}
public byte[] Encrypt(byte[] clearText)
{
byte[] bytes = Compress (clearText);
PgpEncryptedDataGenerator encGen = new PgpEncryptedDataGenerator (SymmetricKeyAlgorithmTag.Aes256, true, new SecureRandom ());
foreach (PgpPublicKey pubKey in Recipients)
encGen.AddMethod (pubKey);
MemoryStream outputStream = new MemoryStream ();
Stream cOut = encGen.Open (outputStream, bytes.Length);
cOut.Write (bytes, 0, bytes.Length);
cOut.Close ();
return outputStream.ToArray ();
}
/// <summary>
/// Cryptographically signs and encrypts the specified content for the specified recipients.
/// </summary>
/// <remarks>
/// Cryptographically signs and encrypts the specified content for the specified recipients.
/// </remarks>
/// <returns>A new <see cref="MimeKit.MimePart"/> instance
/// containing the encrypted data.</returns>
/// <param name="signer">The signer.</param>
/// <param name="digestAlgo">The digest algorithm to use for signing.</param>
/// <param name="cipherAlgo">The encryption algorithm.</param>
/// <param name="recipients">The recipients.</param>
/// <param name="content">The content.</param>
/// <exception cref="System.ArgumentNullException">
/// <para><paramref name="signer"/> is <c>null</c>.</para>
/// <para>-or-</para>
/// <para><paramref name="recipients"/> is <c>null</c>.</para>
/// <para>-or-</para>
/// <para><paramref name="content"/> is <c>null</c>.</para>
/// </exception>
/// <exception cref="System.ArgumentException">
/// <para><paramref name="signer"/> cannot be used for signing.</para>
/// <para>-or-</para>
/// <para>One or more of the recipient keys cannot be used for encrypting.</para>
/// <para>-or-</para>
/// <para>No recipients were specified.</para>
/// </exception>
/// <exception cref="System.NotSupportedException">
/// The specified encryption algorithm is not supported.
/// </exception>
/// <exception cref="System.OperationCanceledException">
/// The user chose to cancel the password prompt.
/// </exception>
/// <exception cref="System.UnauthorizedAccessException">
/// 3 bad attempts were made to unlock the secret key.
/// </exception>
public MimePart SignAndEncrypt (PgpSecretKey signer, DigestAlgorithm digestAlgo, EncryptionAlgorithm cipherAlgo, IEnumerable<PgpPublicKey> recipients, Stream content)
{
// TODO: document the exceptions that can be thrown by BouncyCastle
if (signer == null)
throw new ArgumentNullException ("signer");
if (!signer.IsSigningKey)
throw new ArgumentException ("The specified secret key cannot be used for signing.", "signer");
if (recipients == null)
throw new ArgumentNullException ("recipients");
if (content == null)
throw new ArgumentNullException ("content");
var encrypter = new PgpEncryptedDataGenerator (GetSymmetricKeyAlgorithm (cipherAlgo), true);
var hashAlgorithm = GetHashAlgorithm (digestAlgo);
int count = 0;
foreach (var recipient in recipients) {
if (!recipient.IsEncryptionKey)
throw new ArgumentException ("One or more of the recipient keys cannot be used for encrypting.", "recipients");
encrypter.AddMethod (recipient);
count++;
}
if (count == 0)
throw new ArgumentException ("No recipients specified.", "recipients");
var compresser = new PgpCompressedDataGenerator (CompressionAlgorithmTag.ZLib);
using (var compressed = new MemoryBlockStream ()) {
using (var signed = compresser.Open (compressed)) {
var signatureGenerator = new PgpSignatureGenerator (signer.PublicKey.Algorithm, hashAlgorithm);
signatureGenerator.InitSign (PgpSignature.CanonicalTextDocument, GetPrivateKey (signer));
var subpacket = new PgpSignatureSubpacketGenerator ();
foreach (string userId in signer.PublicKey.GetUserIds ()) {
subpacket.SetSignerUserId (false, userId);
break;
}
signatureGenerator.SetHashedSubpackets (subpacket.Generate ());
var onepass = signatureGenerator.GenerateOnePassVersion (false);
onepass.Encode (signed);
var literalGenerator = new PgpLiteralDataGenerator ();
using (var literal = literalGenerator.Open (signed, 't', "mime.txt", content.Length, DateTime.Now)) {
var buf = new byte[4096];
int nread;
while ((nread = content.Read (buf, 0, buf.Length)) > 0) {
signatureGenerator.Update (buf, 0, nread);
literal.Write (buf, 0, nread);
}
literal.Flush ();
}
var signature = signatureGenerator.Generate ();
signature.Encode (signed);
signed.Flush ();
}
compressed.Position = 0;
var memory = new MemoryBlockStream ();
using (var armored = new ArmoredOutputStream (memory)) {
using (var encrypted = encrypter.Open (armored, compressed.Length)) {
compressed.CopyTo (encrypted, 4096);
encrypted.Flush ();
}
armored.Flush ();
}
memory.Position = 0;
return new MimePart ("application", "octet-stream") {
ContentDisposition = new ContentDisposition ("attachment"),
ContentObject = new ContentObject (memory)
};
}
}
/// <summary>
/// Encrypts the specified content for the specified recipients.
/// </summary>
/// <remarks>
/// Encrypts the specified content for the specified recipients.
/// </remarks>
/// <returns>A new <see cref="MimeKit.MimePart"/> instance
/// containing the encrypted data.</returns>
/// <param name="algorithm">The encryption algorithm.</param>
/// <param name="recipients">The recipients.</param>
/// <param name="content">The content.</param>
/// <exception cref="System.ArgumentNullException">
/// <para><paramref name="recipients"/> is <c>null</c>.</para>
/// <para>-or-</para>
/// <para><paramref name="content"/> is <c>null</c>.</para>
/// </exception>
/// <exception cref="System.ArgumentException">
/// <para>One or more of the recipient keys cannot be used for encrypting.</para>
/// <para>-or-</para>
/// <para>No recipients were specified.</para>
/// </exception>
/// <exception cref="System.NotSupportedException">
/// The specified encryption algorithm is not supported.
/// </exception>
public MimePart Encrypt (EncryptionAlgorithm algorithm, IEnumerable<PgpPublicKey> recipients, Stream content)
{
if (recipients == null)
throw new ArgumentNullException ("recipients");
if (content == null)
throw new ArgumentNullException ("content");
var encrypter = new PgpEncryptedDataGenerator (GetSymmetricKeyAlgorithm (algorithm), true);
int count = 0;
foreach (var recipient in recipients) {
if (!recipient.IsEncryptionKey)
throw new ArgumentException ("One or more of the recipient keys cannot be used for encrypting.", "recipients");
encrypter.AddMethod (recipient);
count++;
}
if (count == 0)
throw new ArgumentException ("No recipients specified.", "recipients");
var encrypted = Encrypt (encrypter, content);
return new MimePart ("application", "octet-stream") {
ContentDisposition = new ContentDisposition ("attachment"),
ContentObject = new ContentObject (encrypted),
};
}
public static byte[] EncryptPgp(byte[] input, byte[] publicKey) {
using (MemoryStream publicKeyStream = new MemoryStream(publicKey))
using (MemoryStream outputStream = new MemoryStream())
using (MemoryStream encryptedBytes = new MemoryStream())
{
using (Stream s = new PgpLiteralDataGenerator().Open(outputStream, PgpLiteralData.Binary, PgpLiteralDataGenerator.Console, input.Length, DateTime.Now))
using (Stream inputStream = new MemoryStream(input))
{
s.Write(input, 0, input.Length);
}
PgpPublicKey pubKey = ReadPublicKey(publicKeyStream);
PgpEncryptedDataGenerator dataGenerator = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.Aes256, true, new SecureRandom());
dataGenerator.AddMethod(pubKey);
byte[] output = outputStream.ToArray();
using(Stream dgenStream = dataGenerator.Open(encryptedBytes, output.Length)) {
dgenStream.Write(output, 0, output.Length);
}
dataGenerator.Close();
return encryptedBytes.ToArray();
}
}
/**
* Simple PGP encryptor between byte[].
*
* @param clearData The test to be encrypted
* @param passPhrase The pass phrase (key). This method assumes that the
* key is a simple pass phrase, and does not yet support
* RSA or more sophisiticated keying.
* @param fileName File name. This is used in the Literal Data Packet (tag 11)
* which is really inly important if the data is to be
* related to a file to be recovered later. Because this
* routine does not know the source of the information, the
* caller can set something here for file name use that
* will be carried. If this routine is being used to
* encrypt SOAP MIME bodies, for example, use the file name from the
* MIME type, if applicable. Or anything else appropriate.
*
* @param armor
*
* @return encrypted data.
* @exception IOException
* @exception PgpException
*/
public static byte[] Encrypt(
byte[] clearData,
char[] passPhrase,
string fileName,
SymmetricKeyAlgorithmTag algorithm,
bool armor)
{
if (fileName == null)
{
fileName = PgpLiteralData.Console;
}
byte[] compressedData = Compress(clearData, fileName, CompressionAlgorithmTag.Zip);
MemoryStream bOut = new MemoryStream();
Stream output = bOut;
if (armor)
{
output = new ArmoredOutputStream(output);
}
PgpEncryptedDataGenerator encGen = new PgpEncryptedDataGenerator(algorithm, new SecureRandom());
encGen.AddMethod(passPhrase);
Stream encOut = encGen.Open(output, compressedData.Length);
encOut.Write(compressedData, 0, compressedData.Length);
encOut.Close();
if (armor)
{
output.Close();
}
return bOut.ToArray();
}
/// <summary>
/// Encrypts a file on disk.
/// </summary>
/// <param name="inputFile"></param>
/// <param name="outputFile"></param>
/// <param name="publicKeyStream">The public key to use for encryption.</param>
/// <param name="withIntegrityCheck"></param>
/// <param name="armor">ASCII armor (should be false unless text is needed for email or compatability).</param>
/// <param name="compress">Use Zip compression</param>
public static void EncryptAes256(string inputFile, string outputFile, Stream publicKeyStream, bool withIntegrityCheck, bool armor, bool compress, bool overwrite)
{
if (string.IsNullOrEmpty(inputFile))
{
throw new ArgumentException("inputFile");
}
if (!File.Exists(inputFile))
{
throw new FileNotFoundException(string.Format("The file '{0}' could not be found.", inputFile));
}
if (string.IsNullOrEmpty(outputFile))
{
throw new ArgumentException("outputFile");
}
if (File.Exists(outputFile) && !overwrite)
{
throw new InvalidOperationException(string.Format("The file '{0}' already exists and 'overwrite' is false.", inputFile));
}
if (publicKeyStream == null)
{
throw new ArgumentNullException("publicKeyStream");
}
PgpPublicKey pubKey = ReadPublicKey(publicKeyStream);
using (MemoryStream outputBytes = new MemoryStream())
{
//PgpCompressedDataGenerator dataCompressor = new PgpCompressedDataGenerator(CompressionAlgorithmTag.Zip);
//PgpUtilities.WriteFileToLiteralData(dataCompressor.Open(outputBytes), PgpLiteralData.Binary, new FileInfo(inputFile));
//dataCompressor.Close();
var compressionAlg = CompressionAlgorithmTag.Uncompressed;
if (compress)
{
compressionAlg = CompressionAlgorithmTag.Zip;
}
byte[] processedData;
var fiOut = new FileInfo(outputFile);
var fiIn = new FileInfo(inputFile);
var inputData = File.ReadAllBytes(inputFile);
processedData = Compress(inputData, fiIn.Name, compressionAlg);
PgpEncryptedDataGenerator dataGenerator = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.Aes256, withIntegrityCheck, new SecureRandom());
dataGenerator.AddMethod(pubKey);
using (Stream outputStream = File.Create(outputFile))
{
if (armor)
{
using (ArmoredOutputStream armoredStream = new ArmoredOutputStream(outputStream))
{
StreamHelper.WriteStream(dataGenerator.Open(armoredStream, processedData.Length), ref processedData);
}
}
else
{
StreamHelper.WriteStream(dataGenerator.Open(outputStream, processedData.Length), ref processedData);
}
}
}
}
private Stream ChainEncryptedOut(Stream outputStream)
{
PgpEncryptedDataGenerator encryptedDataGenerator;
encryptedDataGenerator = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.TripleDes, new SecureRandom());
encryptedDataGenerator.AddMethod(m_encryptionKeys.PublicKey);
return encryptedDataGenerator.Open(outputStream, new byte[BufferSize]);
}
/// <summary>
/// Encrypt data to a set of recipients
/// </summary>
/// <param name="data">Data to encrypt</param>
/// <param name="recipients">List of email addresses</param>
/// <param name="recipients">Headers to add to ascii armor</param>
/// <returns>Returns ascii armored encrypted data</returns>
public string Encrypt(byte[] data, IList<string> recipients, Dictionary<string, string> headers)
{
Context = new CryptoContext(Context);
var compressedData = new PgpCompressedDataGenerator(CompressionAlgorithmTag.Zip);
var literalData = new PgpLiteralDataGenerator();
var cryptData = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.Cast5, true, new SecureRandom());
foreach (var recipient in recipients)
{
var recipientKey = GetPublicKeyForEncryption(recipient);
if (recipientKey == null)
throw new PublicKeyNotFoundException("Error, unable to find recipient key \"" + recipient + "\".");
cryptData.AddMethod(recipientKey);
}
using (var sout = new MemoryStream())
{
using (var armoredOut = new ArmoredOutputStream(sout))
{
foreach(var header in headers)
armoredOut.SetHeader(header.Key, header.Value);
using (var clearOut = new MemoryStream())
{
using (var compressedOut = compressedData.Open(clearOut))
using (var literalOut = literalData.Open(
compressedOut,
PgpLiteralData.Binary,
"email",
data.Length,
DateTime.UtcNow))
{
literalOut.Write(data, 0, data.Length);
}
var clearData = clearOut.ToArray();
using (var encryptOut = cryptData.Open(armoredOut, clearData.Length))
{
encryptOut.Write(clearData, 0, clearData.Length);
}
}
}
return ASCIIEncoding.ASCII.GetString(sout.ToArray());
}
}
private static void EncryptFile(
Stream outputStream,
string fileName,
char[] passPhrase,
bool armor,
bool withIntegrityCheck)
{
if (armor)
{
outputStream = new ArmoredOutputStream(outputStream);
}
try
{
byte[] compressedData = PgpExampleUtilities.CompressFile(fileName, CompressionAlgorithmTag.Zip);
PgpEncryptedDataGenerator encGen = new PgpEncryptedDataGenerator(
SymmetricKeyAlgorithmTag.Cast5, withIntegrityCheck, new SecureRandom());
encGen.AddMethod(passPhrase);
Stream encOut = encGen.Open(outputStream, compressedData.Length);
encOut.Write(compressedData, 0, compressedData.Length);
encOut.Close();
if (armor)
{
outputStream.Close();
}
}
catch (PgpException e)
{
Console.Error.WriteLine(e);
Exception underlyingException = e.InnerException;
if (underlyingException != null)
{
Console.Error.WriteLine(underlyingException.Message);
Console.Error.WriteLine(underlyingException.StackTrace);
}
}
}
/// <summary>
/// Signs then encrypts data using key and list of recipients.
/// </summary>
/// <param name="data">Data to encrypt</param>
/// <param name="key">Signing key</param>
/// <param name="recipients">List of keys to encrypt to</param>
/// <returns>Returns ascii armored signed/encrypted data</returns>
protected string SignAndEncrypt(byte[] data, string key, IList<string> recipients, Dictionary<string, string> headers, bool isBinary)
{
Context = new CryptoContext(Context);
var senderKey = GetSecretKeyForEncryption(key);
if (senderKey == null)
throw new SecretKeyNotFoundException("Error, Unable to locate sender encryption key \"" + key + "\".");
var senderSignKey = GetSecretKeyForSigning(key);
if (senderSignKey == null)
throw new SecretKeyNotFoundException("Error, Unable to locate sender signing key \"" + key + "\".");
var compressedData = new PgpCompressedDataGenerator(CompressionAlgorithmTag.ZLib);
var literalData = new PgpLiteralDataGenerator();
var cryptData = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.Cast5, true, new SecureRandom());
foreach (var recipient in recipients)
{
var recipientKey = GetPublicKeyForEncryption(recipient);
if (recipientKey == null)
throw new PublicKeyNotFoundException("Error, unable to find recipient key \"" + recipient + "\".");
cryptData.AddMethod(recipientKey);
}
// Setup signature stuff //
var signatureData = new PgpSignatureGenerator(
senderSignKey.PublicKey.Algorithm,
HashAlgorithmTag.Sha256);
signatureData.InitSign(
isBinary ? PgpSignature.BinaryDocument : PgpSignature.CanonicalTextDocument,
senderSignKey.ExtractPrivateKey(Context.Password));
foreach (string userId in senderKey.PublicKey.GetUserIds())
{
var subPacketGenerator = new PgpSignatureSubpacketGenerator();
subPacketGenerator.SetSignerUserId(false, userId);
signatureData.SetHashedSubpackets(subPacketGenerator.Generate());
// Just the first one!
break;
}
// //
using (var sout = new MemoryStream())
{
using (var armoredOut = new ArmoredOutputStream(sout))
{
foreach (var header in headers)
armoredOut.SetHeader(header.Key, header.Value);
using (var clearOut = new MemoryStream())
{
using (var compressedOut = compressedData.Open(clearOut))
{
signatureData.GenerateOnePassVersion(false).Encode(compressedOut);
using (var literalOut = literalData.Open(
compressedOut,
isBinary ? PgpLiteralData.Binary : PgpLiteralData.Text,
"",
data.Length,
DateTime.UtcNow))
{
literalOut.Write(data, 0, data.Length);
signatureData.Update(data, 0, data.Length);
}
signatureData.Generate().Encode(compressedOut);
}
var clearData = clearOut.ToArray();
using (var encryptOut = cryptData.Open(armoredOut, clearData.Length))
{
encryptOut.Write(clearData, 0, clearData.Length);
}
}
}
return ASCIIEncoding.ASCII.GetString(sout.ToArray());
}
}
/// <summary>
/// Encrypts data using a PGP public key and returns a byte array.
/// </summary>
/// <param name="inputData">data to encrypt</param>
/// <param name="outputName">Reference file name used for compression file name (not a fully qualified path)</param>
/// <param name="publicKeyStream">The public key to use for encryption.</param>
/// <param name="withIntegrityCheck"></param>
/// <param name="armor">ASCII armor (should be false unless text is needed for email or compatability).</param>
/// <param name="compress">Use Zip compression</param>
/// <returns>The encrypted byte array</returns>
public static byte[] EncryptAes256(byte[] inputData, string outputName, Stream publicKeyStream, bool withIntegrityCheck, bool armor, bool compress)
{
var pubKey = ReadPublicKey(publicKeyStream);
var compressionAlg = CompressionAlgorithmTag.Uncompressed;
if (compress)
{
compressionAlg = CompressionAlgorithmTag.Zip;
}
byte[] processedData = Compress(inputData, outputName, compressionAlg);
MemoryStream bOut = new MemoryStream();
Stream output = bOut;
if (armor)
{
output = new ArmoredOutputStream(output);
}
PgpEncryptedDataGenerator encGen = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.Aes256, withIntegrityCheck, new SecureRandom());
encGen.AddMethod(pubKey);
Stream encOut = encGen.Open(output, processedData.Length);
encOut.Write(processedData, 0, processedData.Length);
encOut.Close();
if (armor)
{
output.Close();
}
return bOut.ToArray();
}
public static void SignAndEncryptFile(string actualFileName, string embeddedFileName,
Stream privateKeyStream, string passPhrase, Stream publicKeyStream,
bool armor, bool withIntegrityCheck, Stream outputStream)
{
const int BUFFER_SIZE = 1 << 16; // should always be power of 2
if (armor)
outputStream = new ArmoredOutputStream(outputStream);
PgpPublicKey pubKey = ReadPublicKey(publicKeyStream);
// Init encrypted data generator
PgpEncryptedDataGenerator encryptedDataGenerator =
new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.Cast5, withIntegrityCheck, new SecureRandom());
encryptedDataGenerator.AddMethod(pubKey);
Stream encryptedOut = encryptedDataGenerator.Open(outputStream, new byte[BUFFER_SIZE]);
// Init compression
PgpCompressedDataGenerator compressedDataGenerator = new PgpCompressedDataGenerator(CompressionAlgorithmTag.Zip);
Stream compressedOut = compressedDataGenerator.Open(encryptedOut);
// Init signature
PgpSecretKeyRingBundle pgpSecBundle = new PgpSecretKeyRingBundle(PgpUtilities.GetDecoderStream(privateKeyStream));
var pgpSecKey = ReadSecretKey(pgpSecBundle);
if (pgpSecKey == null)
throw new ArgumentException(pubKey.KeyId.ToString("X") + " could not be found in specified key ring bundle.", "keyId");
PgpPrivateKey pgpPrivKey = pgpSecKey.ExtractPrivateKey(passPhrase.ToCharArray());
PgpSignatureGenerator signatureGenerator = new PgpSignatureGenerator(pgpSecKey.PublicKey.Algorithm, HashAlgorithmTag.Sha1);
signatureGenerator.InitSign(PgpSignature.BinaryDocument, pgpPrivKey);
var userIds = pgpSecKey.PublicKey.GetUserIds();
string userId = null;
foreach (string value in userIds)
{
// Just the first one!
userId = value;
break;
}
if (string.IsNullOrEmpty(userId))
{
throw new ArgumentException(string.Format("Can't find userId in signing key. KeyId '{0}'.", pubKey.KeyId.ToString("X")));
}
PgpSignatureSubpacketGenerator spGen = new PgpSignatureSubpacketGenerator();
spGen.SetSignerUserId(false, userId);
signatureGenerator.SetHashedSubpackets(spGen.Generate());
signatureGenerator.GenerateOnePassVersion(false).Encode(compressedOut);
// Create the Literal Data generator output stream
PgpLiteralDataGenerator literalDataGenerator = new PgpLiteralDataGenerator();
// NOTE: Commented this out because it uses FileInfo to get stats on files and won't work properly
FileInfo embeddedFile = new FileInfo(embeddedFileName);
FileInfo actualFile = new FileInfo(actualFileName);
if (!actualFile.Exists)
{
throw new FileNotFoundException(actualFile.FullName);
}
// TODO: Use lastwritetime from source file
Stream literalOut = literalDataGenerator.Open(compressedOut, PgpLiteralData.Binary, embeddedFile.Name, actualFile.LastWriteTime, new byte[BUFFER_SIZE]);
// Open the input file
FileStream inputStream = actualFile.OpenRead();
byte[] buf = new byte[BUFFER_SIZE];
int len;
while ((len = inputStream.Read(buf, 0, buf.Length)) > 0)
{
literalOut.Write(buf, 0, len);
signatureGenerator.Update(buf, 0, len);
}
literalOut.Close();
literalDataGenerator.Close();
signatureGenerator.Generate().Encode(compressedOut);
compressedOut.Close();
compressedDataGenerator.Close();
encryptedOut.Close();
encryptedDataGenerator.Close();
inputStream.Close();
if (armor)
outputStream.Close();
}
public string encryptPgpString(string inputString, long receiverId, bool armor, bool withIntegrityCheck)
{
PgpPublicKey pubKey = ReadPublicKey(receiverId);
using (MemoryStream outputBytes = getMemoryStreamFromString(inputString))
{
PgpEncryptedDataGenerator dataGenerator = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.Aes256, withIntegrityCheck, new SecureRandom());
dataGenerator.AddMethod(pubKey);
byte[] dataBytes = outputBytes.ToArray();
using ( Stream outputStream = new MemoryStream() )
{
if (armor)
{
using (ArmoredOutputStream armoredStream = new ArmoredOutputStream(outputStream))
{
Stream encryptedStream = writeStream(dataGenerator.Open(armoredStream, dataBytes.Length), ref dataBytes);
string sOutputString = getStringFromStream (encryptedStream);
return sOutputString;
}
}
else
{
Stream encryptedStream = writeStream(dataGenerator.Open(outputStream, dataBytes.Length), ref dataBytes);
string sOutputString = getStringFromStream (encryptedStream);
return sOutputString;
}
}
}
}
//public static void EncryptPgpFile(string inputFile, string outputFile)
//{
// // use armor: yes, use integrity check? yes?
// EncryptPgpFile(inputFile, outputFile, PublicKeyPath, true, true);
//}
public static void EncryptPgpFile(string inputFile, string outputFile, string publicKeyFile, bool armor, bool withIntegrityCheck)
{
using (Stream publicKeyStream = File.OpenRead(publicKeyFile))
{
PgpPublicKey pubKey = ReadPublicKey(publicKeyStream);
using (MemoryStream outputBytes = new MemoryStream())
{
PgpCompressedDataGenerator dataCompressor = new PgpCompressedDataGenerator(CompressionAlgorithmTag.Zip);
PgpUtilities.WriteFileToLiteralData(dataCompressor.Open(outputBytes), PgpLiteralData.Binary, new FileInfo(inputFile));
dataCompressor.Close();
PgpEncryptedDataGenerator dataGenerator = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.Cast5, withIntegrityCheck, new SecureRandom());
dataGenerator.AddMethod(pubKey);
byte[] dataBytes = outputBytes.ToArray();
using (Stream outputStream = File.Create(outputFile))
{
if (armor)
{
using (ArmoredOutputStream armoredStream = new ArmoredOutputStream(outputStream))
{
IoHelper.WriteStream(dataGenerator.Open(armoredStream, dataBytes.Length), ref dataBytes);
}
}
else
{
IoHelper.WriteStream(dataGenerator.Open(outputStream, dataBytes.Length), ref dataBytes);
}
}
}
}
}