public override void Serialize(Stream stream, object obj)
{
/* check for required parameters */
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (obj == null)
{
throw new ArgumentNullException("obj");
}
PinnedArray <char> passphrase = null;
string ciphername;
if (passphrase == null || passphrase.Data.Length == 0)
{
ciphername = KDFNAME_NONE;
}
else
{
ciphername = KDFNAME_BCRYPT;
}
var builder = new BlobBuilder();
ISshKey sshKey = obj as ISshKey;
if (sshKey == null)
{
throw new ArgumentException("Expected ISshKey", "obj");
}
var publicKeyParams = sshKey.GetPublicKeyParameters() as Ed25519PublicKeyParameter;
var privateKeyParams = sshKey.GetPrivateKeyParameters() as Ed25519PrivateKeyParameter;
/* writing info headers */
builder.AddBytes(Encoding.ASCII.GetBytes(AUTH_MAGIC));
builder.AddStringBlob(ciphername);
builder.AddStringBlob(ciphername); //kdfname
builder.AddBlob(new byte[0]); // kdfoptions
/* writing public key */
builder.AddInt(1); // number of keys N
var publicKeyBuilder = new BlobBuilder();
publicKeyBuilder.AddStringBlob(PublicKeyAlgorithm.ED25519.GetIdentifierString());
publicKeyBuilder.AddBlob(publicKeyParams.Key);
builder.AddBlob(publicKeyBuilder.GetBlob());
/* writing private key */
BlobBuilder privateKeyBuilder = new BlobBuilder();
var checkint = new SecureRandom().NextInt();
privateKeyBuilder.AddInt(checkint);
privateKeyBuilder.AddInt(checkint);
privateKeyBuilder.AddStringBlob(PublicKeyAlgorithm.ED25519.GetIdentifierString());
privateKeyBuilder.AddBlob(publicKeyParams.Key);
privateKeyBuilder.AddBlob(privateKeyParams.Signature);
privateKeyBuilder.AddStringBlob(sshKey.Comment);
if (ciphername == KDFNAME_NONE)
{
/* plain-text */
builder.AddBlob(privateKeyBuilder.GetBlobAsPinnedByteArray().Data);
}
else
{
byte[] keydata;
using (MD5 md5 = MD5.Create()) {
keydata = md5.ComputeHash(Encoding.ASCII.GetBytes(passphrase.Data));
}
passphrase.Dispose();
}
/* writing result to file */
var builderOutput = builder.GetBlobAsPinnedByteArray();
using (var writer = new StreamWriter(stream)) {
writer.NewLine = "\n";
writer.WriteLine(MARK_BEGIN);
var base64Data = Util.ToBase64(builderOutput.Data);
var base64String = Encoding.UTF8.GetString(base64Data);
var offset = 0;
while (offset < base64String.Length)
{
const int maxLineLength = 70;
if (offset + maxLineLength > base64String.Length)
{
writer.WriteLine(base64String.Substring(offset));
}
else
{
writer.WriteLine(base64String.Substring(offset, maxLineLength));
}
offset += maxLineLength;
}
writer.WriteLine(MARK_END);
}
}
public override void Serialize(Stream aStream, object aObject)
{
/* check for required parameters */
if (aStream == null)
{
throw new ArgumentNullException("aStream");
}
if (aObject == null)
{
throw new ArgumentNullException("aObject");
}
PasswordFinder pwFinder = null;
if (GetPassphraseCallbackMethod != null)
{
pwFinder = new PasswordFinder(GetPassphraseCallbackMethod);
}
PinnedArray <char> passphrase = null;
if (pwFinder != null)
{
passphrase = new PinnedArray <char>(0);
passphrase.Data = pwFinder.GetPassword();
}
byte cipherType;
if (passphrase == null || passphrase.Data.Length == 0)
{
cipherType = SSH_CIPHER_NONE;
}
else
{
cipherType = SSH_CIPHER_3DES;
}
BlobBuilder builder = new BlobBuilder();
ISshKey sshKey = aObject as ISshKey;
RsaKeyParameters publicKeyParams = sshKey.GetPublicKeyParameters()
as RsaKeyParameters;
RsaPrivateCrtKeyParameters privateKeyParams = sshKey.GetPrivateKeyParameters()
as RsaPrivateCrtKeyParameters;
/* writing info headers */
builder.AddBytes(Encoding.ASCII.GetBytes(FILE_HEADER_LINE + "\n"));
builder.AddUInt8(0); //end of string
builder.AddUInt8(cipherType); //cipher
builder.AddInt(0); //reserved
/* writing public key */
builder.AddInt(sshKey.Size);
builder.AddSsh1BigIntBlob(publicKeyParams.Modulus);
builder.AddSsh1BigIntBlob(publicKeyParams.Exponent);
builder.AddStringBlob(sshKey.Comment);
/* writing private key */
BlobBuilder privateKeyBuilder = new BlobBuilder();
/* adding some control values */
Random random = new Random();
byte[] resultCheck = new byte[2];
random.NextBytes(resultCheck);
privateKeyBuilder.AddUInt8(resultCheck[0]);
privateKeyBuilder.AddUInt8(resultCheck[1]);
privateKeyBuilder.AddUInt8(resultCheck[0]);
privateKeyBuilder.AddUInt8(resultCheck[1]);
privateKeyBuilder.AddSsh1BigIntBlob(privateKeyParams.Exponent);
privateKeyBuilder.AddSsh1BigIntBlob(privateKeyParams.DQ);
privateKeyBuilder.AddSsh1BigIntBlob(privateKeyParams.P);
privateKeyBuilder.AddSsh1BigIntBlob(privateKeyParams.Q);
if (cipherType == SSH_CIPHER_NONE)
{
/* plain-text */
builder.AddBytes(privateKeyBuilder.GetBlobAsPinnedByteArray().Data);
}
else
{
byte[] keydata;
using (MD5 md5 = MD5.Create()) {
keydata = md5.ComputeHash(Encoding.ASCII.GetBytes(passphrase.Data));
}
/* encryption */
DesSsh1Engine desEngine = new DesSsh1Engine();
desEngine.Init(true, new KeyParameter(keydata));
BufferedBlockCipher bufferedBlockCipher = new BufferedBlockCipher(desEngine);
byte[] ouputBuffer = bufferedBlockCipher.ProcessBytes(
privateKeyBuilder.GetBlobAsPinnedByteArray().Data);
builder.AddBytes(ouputBuffer);
passphrase.Dispose();
}
/* writing result to file */
var builderOutput = builder.GetBlobAsPinnedByteArray();
aStream.Write(builderOutput.Data, 0, builderOutput.Data.Length);
aStream.Close();
}
BlobBuilder CreatePrivateKeyBlob(ISshKey key)
{
var builder = new BlobBuilder();
switch (key.Version)
{
case SshVersion.SSH1:
var privateKeyParams =
key.GetPrivateKeyParameters() as RsaPrivateCrtKeyParameters;
builder.AddInt(key.Size);
builder.AddSsh1BigIntBlob(privateKeyParams.Modulus);
builder.AddSsh1BigIntBlob(privateKeyParams.PublicExponent);
builder.AddSsh1BigIntBlob(privateKeyParams.Exponent);
builder.AddSsh1BigIntBlob(privateKeyParams.QInv);
builder.AddSsh1BigIntBlob(privateKeyParams.Q);
builder.AddSsh1BigIntBlob(privateKeyParams.P);
break;
case SshVersion.SSH2:
builder.AddStringBlob(key.Algorithm.GetIdentifierString());
switch (key.Algorithm)
{
case PublicKeyAlgorithm.SSH_DSS:
var dsaPublicKeyParameters = key.GetPublicKeyParameters() as
DsaPublicKeyParameters;
var dsaPrivateKeyParamters = key.GetPrivateKeyParameters() as
DsaPrivateKeyParameters;
builder.AddBigIntBlob(dsaPublicKeyParameters.Parameters.P);
builder.AddBigIntBlob(dsaPublicKeyParameters.Parameters.Q);
builder.AddBigIntBlob(dsaPublicKeyParameters.Parameters.G);
builder.AddBigIntBlob(dsaPublicKeyParameters.Y);
builder.AddBigIntBlob(dsaPrivateKeyParamters.X);
break;
case PublicKeyAlgorithm.ECDSA_SHA2_NISTP256:
case PublicKeyAlgorithm.ECDSA_SHA2_NISTP384:
case PublicKeyAlgorithm.ECDSA_SHA2_NISTP521:
var ecdsaPublicKeyParameters = key.GetPublicKeyParameters() as
ECPublicKeyParameters;
var ecdsaPrivateKeyParameters = key.GetPrivateKeyParameters() as
ECPrivateKeyParameters;
builder.AddStringBlob(key.Algorithm.GetIdentifierString()
.Replace(PublicKeyAlgorithmExt.ALGORITHM_ECDSA_SHA2_PREFIX,
string.Empty));
builder.AddBlob(ecdsaPublicKeyParameters.Q.GetEncoded());
builder.AddBigIntBlob(ecdsaPrivateKeyParameters.D);
break;
case PublicKeyAlgorithm.SSH_RSA:
var rsaPrivateKeyParameters = key.GetPrivateKeyParameters() as
RsaPrivateCrtKeyParameters;
builder.AddBigIntBlob(rsaPrivateKeyParameters.Modulus);
builder.AddBigIntBlob(rsaPrivateKeyParameters.PublicExponent);
builder.AddBigIntBlob(rsaPrivateKeyParameters.Exponent);
builder.AddBigIntBlob(rsaPrivateKeyParameters.QInv);
builder.AddBigIntBlob(rsaPrivateKeyParameters.P);
builder.AddBigIntBlob(rsaPrivateKeyParameters.Q);
break;
case PublicKeyAlgorithm.ED25519:
var ed25519PublicKeyParameters = key.GetPublicKeyParameters() as
Ed25519PublicKeyParameter;
var ed25519PrivateKeyParameters = key.GetPrivateKeyParameters() as
Ed25519PrivateKeyParameter;
builder.AddBlob(ed25519PublicKeyParameters.Key);
builder.AddBlob(ed25519PrivateKeyParameters.Signature);
break;
default:
throw new Exception("Unsupported algorithm");
}
break;
default:
throw new Exception(cUnsupportedSshVersion);
}
builder.AddStringBlob(key.Comment);
return(builder);
}
BlobBuilder CreatePrivateKeyBlob(ISshKey key)
{
var builder = new BlobBuilder();
switch (key.Version) {
case SshVersion.SSH1:
var privateKeyParams =
key.GetPrivateKeyParameters() as RsaPrivateCrtKeyParameters;
builder.AddInt(key.Size);
builder.AddSsh1BigIntBlob(privateKeyParams.Modulus);
builder.AddSsh1BigIntBlob(privateKeyParams.PublicExponent);
builder.AddSsh1BigIntBlob(privateKeyParams.Exponent);
builder.AddSsh1BigIntBlob(privateKeyParams.QInv);
builder.AddSsh1BigIntBlob(privateKeyParams.Q);
builder.AddSsh1BigIntBlob(privateKeyParams.P);
break;
case SshVersion.SSH2:
builder.AddStringBlob(key.Algorithm.GetIdentifierString());
switch (key.Algorithm) {
case PublicKeyAlgorithm.SSH_DSS:
var dsaPublicKeyParameters = key.GetPublicKeyParameters() as
DsaPublicKeyParameters;
var dsaPrivateKeyParamters = key.GetPrivateKeyParameters() as
DsaPrivateKeyParameters;
builder.AddBigIntBlob(dsaPublicKeyParameters.Parameters.P);
builder.AddBigIntBlob(dsaPublicKeyParameters.Parameters.Q);
builder.AddBigIntBlob(dsaPublicKeyParameters.Parameters.G);
builder.AddBigIntBlob(dsaPublicKeyParameters.Y);
builder.AddBigIntBlob(dsaPrivateKeyParamters.X);
break;
case PublicKeyAlgorithm.ECDSA_SHA2_NISTP256:
case PublicKeyAlgorithm.ECDSA_SHA2_NISTP384:
case PublicKeyAlgorithm.ECDSA_SHA2_NISTP521:
var ecdsaPublicKeyParameters = key.GetPublicKeyParameters() as
ECPublicKeyParameters;
var ecdsaPrivateKeyParameters = key.GetPrivateKeyParameters() as
ECPrivateKeyParameters;
builder.AddStringBlob(key.Algorithm.GetIdentifierString()
.Replace(PublicKeyAlgorithmExt.ALGORITHM_ECDSA_SHA2_PREFIX,
string.Empty));
builder.AddBlob(ecdsaPublicKeyParameters.Q.GetEncoded());
builder.AddBigIntBlob(ecdsaPrivateKeyParameters.D);
break;
case PublicKeyAlgorithm.SSH_RSA:
var rsaPrivateKeyParameters = key.GetPrivateKeyParameters() as
RsaPrivateCrtKeyParameters;
builder.AddBigIntBlob(rsaPrivateKeyParameters.Modulus);
builder.AddBigIntBlob(rsaPrivateKeyParameters.PublicExponent);
builder.AddBigIntBlob(rsaPrivateKeyParameters.Exponent);
builder.AddBigIntBlob(rsaPrivateKeyParameters.QInv);
builder.AddBigIntBlob(rsaPrivateKeyParameters.P);
builder.AddBigIntBlob(rsaPrivateKeyParameters.Q);
break;
case PublicKeyAlgorithm.ED25519:
var ed25519PublicKeyParameters = key.GetPublicKeyParameters() as
Ed25519PublicKeyParameter;
var ed25519PrivateKeyParameters = key.GetPrivateKeyParameters() as
Ed25519PrivateKeyParameter;
builder.AddBlob(ed25519PublicKeyParameters.Key);
builder.AddBlob(ed25519PrivateKeyParameters.Signature);
break;
default:
throw new Exception("Unsupported algorithm");
}
break;
default:
throw new Exception(cUnsupportedSshVersion);
}
builder.AddStringBlob(key.Comment);
return builder;
}
