|
public Open ( Stream outStr, char format, |
||
| outStr | Stream | The stream we want the packet in. |
| format | char | The format we are using. |
| file | The |
|
| return | Stream | |
/// <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 void WriteFileToLiteralData(Stream output, char fileType, FileInfo file, byte[] buffer)
{
PgpLiteralDataGenerator pgpLiteralDataGenerator = new PgpLiteralDataGenerator();
Stream pOut = pgpLiteralDataGenerator.Open(output, fileType, ((FileSystemInfo)file).get_Name(), ((FileSystemInfo)file).get_LastWriteTime(), buffer);
PipeFileContents(file, pOut, buffer.Length);
}
/// <summary>Write out the passed in file as a literal data packet.</summary>
public static void WriteFileToLiteralData(
Stream output,
char fileType,
FileInfo file)
{
PgpLiteralDataGenerator lData = new PgpLiteralDataGenerator();
Stream pOut = lData.Open(output, fileType, file.Name, file.Length, file.LastWriteTime);
PipeFileContents(file, pOut, 4096);
}
/// <summary>Write out the passed in file as a literal data packet in partial packet format.</summary>
public static void WriteFileToLiteralData(Stream output, char fileType, FileInfo file, byte[] buffer)
{
var lData = new PgpLiteralDataGenerator();
using (var pOut = lData.Open(output, fileType, file.Name, file.LastWriteTime, buffer))
{
PipeFileContents(file, pOut, buffer.Length);
}
}
/// <summary>Write out the passed in file as a literal data packet.</summary>
public async static Task WriteFileToLiteralData(
Stream output,
char fileType,
StorageFile file)
{
PgpLiteralDataGenerator lData = new PgpLiteralDataGenerator();
var props = await file.GetBasicPropertiesAsync();
Stream pOut = lData.Open(output, fileType, file.Name, (long)props.Size, props.DateModified.DateTime);
await PipeFileContents(file, pOut, 4096);
}
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;
}
/// <summary>Write out the passed in file as a literal data packet in partial packet format.</summary>
public static void WriteFileToLiteralData(
Stream outputStream,
char fileType,
FileInfo file,
byte[] buffer)
{
PgpLiteralDataGenerator lData = new PgpLiteralDataGenerator();
Stream pOut = lData.Open(outputStream, fileType, file.Name, file.LastWriteTime, buffer);
FileStream inputStream = file.OpenRead();
byte[] buf = new byte[buffer.Length];
int len;
while ((len = inputStream.Read(buf, 0, buf.Length)) > 0)
{
pOut.Write(buf, 0, len);
}
lData.Close();
inputStream.Close();
}
/// <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);
}
}
}
/**
* Generate an encapsulated signed file.
*
* @param fileName
* @param keyIn
* @param outputStream
* @param pass
* @param armor
*/
private static void SignFile(
string fileName,
Stream keyIn,
Stream outputStream,
char[] pass,
bool armor,
bool compress)
{
if (armor)
{
outputStream = new ArmoredOutputStream(outputStream);
}
PgpSecretKey pgpSec = PgpExampleUtilities.ReadSecretKey(keyIn);
PgpPrivateKey pgpPrivKey = pgpSec.ExtractPrivateKey(pass);
PgpSignatureGenerator sGen = new PgpSignatureGenerator(pgpSec.PublicKey.Algorithm, HashAlgorithmTag.Sha1);
sGen.InitSign(PgpSignature.BinaryDocument, pgpPrivKey);
foreach (string userId in pgpSec.PublicKey.GetUserIds())
{
PgpSignatureSubpacketGenerator spGen = new PgpSignatureSubpacketGenerator();
spGen.SetSignerUserId(false, userId);
sGen.SetHashedSubpackets(spGen.Generate());
// Just the first one!
break;
}
Stream cOut = outputStream;
PgpCompressedDataGenerator cGen = null;
if (compress)
{
cGen = new PgpCompressedDataGenerator(CompressionAlgorithmTag.ZLib);
cOut = cGen.Open(cOut);
}
BcpgOutputStream bOut = new BcpgOutputStream(cOut);
sGen.GenerateOnePassVersion(false).Encode(bOut);
FileInfo file = new FileInfo(fileName);
PgpLiteralDataGenerator lGen = new PgpLiteralDataGenerator();
Stream lOut = lGen.Open(bOut, PgpLiteralData.Binary, file);
FileStream fIn = file.OpenRead();
int ch = 0;
while ((ch = fIn.ReadByte()) >= 0)
{
lOut.WriteByte((byte) ch);
sGen.Update((byte)ch);
}
fIn.Close();
lGen.Close();
sGen.Generate().Encode(bOut);
if (cGen != null)
{
cGen.Close();
}
if (armor)
{
outputStream.Close();
}
}
private static Stream ChainLiteralOut(Stream compressedOut, FileInfo file)
{
PgpLiteralDataGenerator pgpLiteralDataGenerator = new PgpLiteralDataGenerator();
return pgpLiteralDataGenerator.Open(compressedOut, PgpLiteralData.Binary, file);
}
/// <summary>Write out the passed in file as a literal data packet in partial packet format.</summary>
public static void WriteFileToLiteralData(
Stream output,
char fileType,
FileInfo file,
byte[] buffer)
{
PgpLiteralDataGenerator lData = new PgpLiteralDataGenerator();
Stream pOut = lData.Open(output, fileType, file.Name, file.LastWriteTime, buffer);
PipeFileContents(file, pOut, buffer.Length);
}
/// <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());
}
}
/**
* Generates an encapsulated signed file.
*/
public void signMessage(Stream unsignedContent, Stream signedContent, bool armor)
{
if (armor) {
// output will be BASE64 encoded
signedContent = new ArmoredOutputStream(signedContent);
}
PgpCompressedDataGenerator compressedDataGenerator = new PgpCompressedDataGenerator(CompressionAlgorithmTag.ZLib);
PgpLiteralDataGenerator literalDataGenerator = new PgpLiteralDataGenerator();
try {
BcpgOutputStream bcpgSignedContentOut = new BcpgOutputStream(compressedDataGenerator.Open(signedContent));
PgpPrivateKey pgpPrivateKey = secretKeyForSigning.ExtractPrivateKey(secretKeyPassword);
PgpSignatureGenerator signatureGenerator = createSignatureGenerator(pgpPrivateKey);
signatureGenerator.GenerateOnePassVersion(false).Encode(bcpgSignedContentOut);
Stream literalDataOut = literalDataGenerator.Open(bcpgSignedContentOut, PgpLiteralData.Binary, "_CONSOLE", unsignedContent.Length, DateTime.Now);
updateSignatureGeneratorWithInputBytes(unsignedContent, signatureGenerator, literalDataOut);
signatureGenerator.Generate().Encode(bcpgSignedContentOut);
} finally {
literalDataGenerator.Close();
compressedDataGenerator.Close();
signedContent.Close();
}
}
private void writeClearDataToByteOut(PgpCompressedDataGenerator compressedDataGenerator, PgpLiteralDataGenerator literalDataGenerator, byte[] clearData, Stream byteOut)
{
try {
Stream pOut = literalDataGenerator.Open(compressedDataGenerator.Open(byteOut), // the compressed output stream
PgpLiteralData.Binary,
PgpLiteralData.Text.ToString(), // "filename" to store
clearData.Length, // length of clear data
DateTime.Now // current time
);
pOut.Write(clearData, 0, clearData.Length);
} finally {
literalDataGenerator.Close();
}
}
static Stream Compress (Stream content)
{
var compresser = new PgpCompressedDataGenerator (CompressionAlgorithmTag.ZLib);
var memory = new MemoryBlockStream ();
using (var compressed = compresser.Open (memory)) {
var literalGenerator = new PgpLiteralDataGenerator ();
using (var literal = literalGenerator.Open (compressed, 't', "mime.txt", content.Length, DateTime.Now)) {
content.CopyTo (literal, 4096);
literal.Flush ();
}
compressed.Flush ();
}
memory.Position = 0;
return memory;
}
/// <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());
}
}
/// <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)
};
}
}
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();
}
/// <summary>
/// Sign data using key
/// </summary>
/// <param name="data">Data to sign</param>
/// <param name="key">Email address of key</param>
/// <returns>Returns ascii armored signature</returns>
public string Sign(byte[] data, string key, Dictionary<string, string> headers)
{
Context = new CryptoContext(Context);
var senderKey = GetSecretKeyForSigning(key);
if (senderKey == null)
throw new SecretKeyNotFoundException("Error, unable to locate signing key \"" + key + "\".");
var compressedData = new PgpCompressedDataGenerator(CompressionAlgorithmTag.Zip);
var literalData = new PgpLiteralDataGenerator();
// Setup signature stuff //
var tag = senderKey.PublicKey.Algorithm;
var signatureData = new PgpSignatureGenerator(tag, HashAlgorithmTag.Sha256);
signatureData.InitSign(PgpSignature.BinaryDocument, senderKey.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 compressedOut = compressedData.Open(armoredOut))
using (var outputStream = new BcpgOutputStream(compressedOut))
{
signatureData.GenerateOnePassVersion(false).Encode(outputStream);
using (var literalOut = literalData.Open(outputStream, 'b', "", data.Length, DateTime.Now))
{
literalOut.Write(data, 0, data.Length);
signatureData.Update(data);
}
signatureData.Generate().Encode(outputStream);
}
}
return ASCIIEncoding.ASCII.GetString(sout.ToArray());
}
}
/// <summary>Write out the passed in file as a literal data packet in partial packet format.</summary>
public static void WriteFileToLiteralData(
Stream outputStream,
char fileType,
FileInfo file,
byte[] buffer)
{
PgpLiteralDataGenerator lData = new PgpLiteralDataGenerator();
Stream pOut = lData.Open(outputStream, fileType, file.Name, file.LastWriteTime, buffer);
FileStream inputStream = file.OpenRead();
byte[] buf = new byte[buffer.Length];
int len;
while ((len = inputStream.Read(buf, 0, buf.Length)) > 0)
{
pOut.Write(buf, 0, len);
}
lData.Close();
inputStream.Close();
}
/// <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());
}
}
//public static string GetPrivateKeyXml(string inputData)
//{
// Stream inputStream = StreamHelper.GetStream(inputData);
// PgpObjectFactory pgpFactory = new PgpObjectFactory(PgpUtilities.GetDecoderStream(inputStream));
// PgpObject pgp = null;
// if (pgpFactory != null)
// {
// pgp = pgpFactory.NextPgpObject();
// }
// PgpEncryptedDataList encryptedData = null;
// if (pgp is PgpEncryptedDataList)
// {
// encryptedData = (PgpEncryptedDataList)pgp;
// }
// else
// {
// encryptedData = (PgpEncryptedDataList)pgpFactory.NextPgpObject();
// }
// Stream privateKeyStream = File.OpenRead(PrivateKeyOnlyPath);
// // find secret key
// PgpSecretKeyRingBundle pgpKeyRing = new PgpSecretKeyRingBundle(PgpUtilities.GetDecoderStream(privateKeyStream));
// PgpPrivateKey privateKey = null;
// foreach (PgpPublicKeyEncryptedData pked in encryptedData.GetEncryptedDataObjects())
// {
// privateKey = FindSecretKey(pgpKeyRing, pked.KeyId, Password.ToCharArray());
// if (privateKey != null)
// {
// //pubKeyData = pked;
// break;
// }
// }
// // get xml:
// RsaPrivateCrtKeyParameters rpckp = ((RsaPrivateCrtKeyParameters)privateKey.Key);
// RSAParameters dotNetParams = DotNetUtilities.ToRSAParameters(rpckp);
// RSA rsa = RSA.Create();
// rsa.ImportParameters(dotNetParams);
// string xmlPrivate = rsa.ToXmlString(true);
// return xmlPrivate;
//}
#endregion
#region helpers
/// <summary>
///
/// </summary>
/// <param name="clearData"></param>
/// <param name="fileName">File name reference for compression to include (not fully qualified).</param>
/// <param name="algorithm"></param>
/// <returns></returns>
private static byte[] Compress(byte[] clearData, string fileName, CompressionAlgorithmTag algorithm)
{
MemoryStream bOut = new MemoryStream();
PgpCompressedDataGenerator comData = new PgpCompressedDataGenerator(algorithm);
Stream cos = comData.Open(bOut); // open it with the final destination
PgpLiteralDataGenerator lData = new PgpLiteralDataGenerator();
// we want to Generate compressed data. This might be a user option later,
// in which case we would pass in bOut.
Stream pOut = lData.Open(
cos, // the compressed output stream
PgpLiteralData.Binary,
fileName, // "filename" to store
clearData.Length, // length of clear data
DateTime.UtcNow // current time
);
pOut.Write(clearData, 0, clearData.Length);
pOut.Close();
comData.Close();
return bOut.ToArray();
}
/// <summary>Write out the passed in file as a literal data packet.</summary>
public static void WriteFileToLiteralData(Stream output, char fileType, FileInfo file)
{
var lData = new PgpLiteralDataGenerator();
using (var pOut = lData.Open(output, fileType, file.Name, file.Length, file.LastWriteTime))
{
PipeFileContents(file, pOut, 4096);
}
}