private string signEnvelopeData(string msg)
{
Stream privateKeyStream = getPrivateKeyStream(_privateKey);
MemoryStream result = new MemoryStream();
ArmoredOutputStream aOut = new ArmoredOutputStream(result);
BcpgOutputStream bOut = null;
char[] privateKeyPassword = _passPhrase.ToCharArray();
var utf8Encoding = new System.Text.UTF8Encoding();
try
{
PgpSecretKey sk = readSecretKey(privateKeyStream);
PgpPrivateKey pk = sk.ExtractPrivateKey(privateKeyPassword);
PgpSignatureGenerator sigGen = new PgpSignatureGenerator(sk.PublicKey.Algorithm,HashAlgorithmTag.Sha256);
PgpSignatureSubpacketGenerator spGen = new PgpSignatureSubpacketGenerator();
var enumerator = sk.PublicKey.GetUserIds().GetEnumerator();
if(enumerator.MoveNext())
{
spGen.SetSignerUserId(false, (string)enumerator.Current);
sigGen.SetHashedSubpackets(spGen.Generate());
}
aOut.BeginClearText(HashAlgorithmTag.Sha256);
sigGen.InitSign(PgpSignature.CanonicalTextDocument, pk);
byte[] msgBytes = utf8Encoding.GetBytes(msg);
sigGen.Update(msgBytes, 0, msgBytes.Length);
aOut.Write(msgBytes, 0, msgBytes.Length);
bOut = new BcpgOutputStream(aOut);
aOut.EndClearText();
sigGen.Generate().Encode(bOut);
using (BinaryReader br = new BinaryReader(result))
{
br.BaseStream.Position = 0;
return utf8Encoding.GetString(br.ReadBytes((int)result.Length));
}
}
catch (Exception e)
{ Console.WriteLine("This happened: " + e.Message);
throw new Exception("Signing Failed: " + e.Message);
}
finally
{
try
{
if (privateKeyStream != null)
privateKeyStream.Close();
//if(bOut != null)
//bOut.Close();
//aOut.Close();
result.Close();
} catch (IOException) {}
}
}
public string PublicKey(string email, Dictionary<string, string> headers)
{
Context = new CryptoContext(Context);
var publicKey = GetPublicKeyForEncryption(email);
var sigKey = GetSecretKeyForSigning(email);
var literalData = new PgpLiteralDataGenerator();
var data = publicKey.GetEncoded();
using (var sout = new MemoryStream())
{
using (var armoredOut = new ArmoredOutputStream(sout))
{
foreach (var header in headers)
armoredOut.SetHeader(header.Key, header.Value);
//using (var literalOut = literalData.Open(
// armoredOut,
// PgpLiteralData.Binary,
// "email",
// data.Length,
// DateTime.UtcNow))
//{
// literalOut.Write(data, 0, data.Length);
//}
armoredOut.Write(data);
}
return ASCIIEncoding.ASCII.GetString(sout.ToArray());
}
}
/// <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 SignClear(string data, string key, Encoding encoding, 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 + "\".");
// Setup signature stuff //
var signatureData = new PgpSignatureGenerator(senderKey.PublicKey.Algorithm, HashAlgorithmTag.Sha1);
signatureData.InitSign(PgpSignature.CanonicalTextDocument, 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);
armoredOut.BeginClearText(HashAlgorithmTag.Sha1);
// Remove any extra trailing whitespace.
// this should not include \r or \n.
data = data.TrimEnd(null);
using (var stringReader = new StringReader(data))
{
do
{
var line = stringReader.ReadLine();
if (line == null)
break;
// Lines must have all white space removed
line = line.TrimEnd(null);
line = line.TrimEnd(new char[] {' ', '\t', '\r', '\n'});
line += "\r\n";
signatureData.Update(encoding.GetBytes(line));
armoredOut.Write(encoding.GetBytes(line));
}
while (true);
}
// Write extra line before signature block.
armoredOut.Write(encoding.GetBytes("\r\n"));
armoredOut.EndClearText();
using (var outputStream = new BcpgOutputStream(armoredOut))
{
signatureData.Generate().Encode(outputStream);
}
}
return encoding.GetString(sout.ToArray());
}
}
/// <summary>
/// Sign data using key
/// </summary>
/// <param name="data">Data to sign</param>
/// <param name="key">Email address of key</param>
/// <param name="headers">Headers to add to signed message</param>
/// <param name="wrapLines">Automatically wrap lines that are too long</param>
/// <param name="encoding">s</param>
/// <returns>Returns ascii armored signature</returns>
public string SignClear(string data, string key, Encoding encoding, Dictionary<string, string> headers, bool wrapLines = true)
{
Context = new CryptoContext(Context);
PgpSecretKey senderMasterKey;
var senderKey = GetSecretKeyForSigning(key, out senderMasterKey);
if (senderKey == null)
throw new SecretKeyNotFoundException("Error, unable to locate signing key \"" + key + "\".");
// Setup signature stuff //
var signatureData = new PgpSignatureGenerator(senderKey.PublicKey.Algorithm, GetHashAlgTagFromString(Context.Digest));
signatureData.InitSign(PgpSignature.CanonicalTextDocument, senderKey.ExtractPrivateKey(Context.PasswordCallback(senderMasterKey, senderKey)));
foreach (string userId in senderKey.PublicKey.GetUserIds())
{
var subPacketGenerator = new PgpSignatureSubpacketGenerator();
subPacketGenerator.SetSignerUserId(false, userId);
signatureData.SetHashedSubpackets(subPacketGenerator.Generate());
// Just the first one!
break;
}
// Split any long lines if we are asked to do so.
var mailLines = data.Split('\n');
if (wrapLines && mailLines.Any(line => line.Length > 70))
{
var lines = new List<string>(mailLines);
for (var i = 0; i < lines.Count; i++)
{
var line = lines[i];
if (line.Length <= 70) continue;
var newLine = line.Substring(70);
line = line.Substring(0, 70);
lines[i] = line;
lines.Insert(i + 1, newLine);
}
var sb = new StringBuilder(data.Length + 20);
foreach (var line in lines)
sb.AppendLine(line.TrimEnd('\r', '\n'));
data = sb.ToString();
}
// Now lets do our signing stuff
using (var sout = new MemoryStream())
{
using (var armoredOut = new ArmoredOutputStream(sout))
{
foreach (var header in headers)
armoredOut.SetHeader(header.Key, header.Value);
armoredOut.BeginClearText(GetHashAlgTagFromString(Context.Digest));
// Remove any extra trailing whitespace.
// this should not include \r or \n.
data = data.TrimEnd(null);
using (var stringReader = new StringReader(data))
{
do
{
var line = stringReader.ReadLine();
if (line == null)
break;
// Lines must have all white space removed
line = line.TrimEnd(null);
line = line.TrimEnd(' ', '\t', '\r', '\n');
line += "\r\n";
signatureData.Update(encoding.GetBytes(line));
armoredOut.Write(encoding.GetBytes(line));
}
while (true);
}
// Write extra line before signature block.
armoredOut.Write(encoding.GetBytes("\r\n"));
armoredOut.EndClearText();
using (var outputStream = new BcpgOutputStream(armoredOut))
signatureData.Generate().Encode(outputStream);
}
return encoding.GetString(sout.ToArray());
}
}
