/**
* Parse a secret key from one of the GPG S expression keys.
*
* @return a secret key object.
*/
public static PgpSecretKey ParseSecretKeyFromSExpr(Stream inputStream, char[] passPhrase)
{
SXprUtilities.SkipOpenParenthesis(inputStream);
string type = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (type.Equals("protected-private-key"))
{
SXprUtilities.SkipOpenParenthesis(inputStream);
string curveName;
string keyType = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (keyType.Equals("ecc"))
{
SXprUtilities.SkipOpenParenthesis(inputStream);
string curveID = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
curveName = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (curveName.StartsWith("NIST "))
{
curveName = curveName.Substring("NIST ".Length);
}
SXprUtilities.SkipCloseParenthesis(inputStream);
}
else
{
throw new PgpException("no curve details found");
}
byte[] qVal;
SXprUtilities.SkipOpenParenthesis(inputStream);
type = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (type.Equals("q"))
{
qVal = SXprUtilities.ReadBytes(inputStream, inputStream.ReadByte());
}
else
{
throw new PgpException("no q value found");
}
PublicKeyPacket pubPacket = new PublicKeyPacket(PublicKeyAlgorithmTag.ECDsa, DateTime.UtcNow,
new ECDsaPublicBcpgKey(ECNamedCurveTable.GetOid(curveName), new BigInteger(1, qVal)));
SXprUtilities.SkipCloseParenthesis(inputStream);
byte[] dValue = GetDValue(inputStream, passPhrase, curveName);
// TODO: check SHA-1 hash.
return(new PgpSecretKey(new SecretKeyPacket(pubPacket, SymmetricKeyAlgorithmTag.Null, null, null,
new ECSecretBcpgKey(new BigInteger(1, dValue)).GetEncoded()), new PgpPublicKey(pubPacket)));
}
throw new PgpException("unknown key type found");
}
private static byte[] GetDValue(Stream inputStream, byte[] rawPassPhrase, bool clearPassPhrase, string curveName)
{
//IL_008a: Unknown result type (might be due to invalid IL or missing references)
//IL_0091: Expected O, but got Unknown
SXprUtilities.SkipOpenParenthesis(inputStream);
string text = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (text.Equals("protected"))
{
SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
SXprUtilities.SkipOpenParenthesis(inputStream);
S2k s2k = SXprUtilities.ParseS2k(inputStream);
byte[] iv = SXprUtilities.ReadBytes(inputStream, inputStream.ReadByte());
SXprUtilities.SkipCloseParenthesis(inputStream);
byte[] array = SXprUtilities.ReadBytes(inputStream, inputStream.ReadByte());
KeyParameter key = PgpUtilities.DoMakeKeyFromPassPhrase(SymmetricKeyAlgorithmTag.Aes128, s2k, rawPassPhrase, clearPassPhrase);
byte[] array2 = RecoverKeyData(SymmetricKeyAlgorithmTag.Aes128, "/CBC/NoPadding", key, iv, array, 0, array.Length);
Stream val = (Stream) new MemoryStream(array2, false);
SXprUtilities.SkipOpenParenthesis(val);
SXprUtilities.SkipOpenParenthesis(val);
SXprUtilities.SkipOpenParenthesis(val);
SXprUtilities.ReadString(val, val.ReadByte());
return(SXprUtilities.ReadBytes(val, val.ReadByte()));
}
throw new PgpException("protected block not found");
}
internal static PgpSecretKey DoParseSecretKeyFromSExpr(Stream inputStream, byte[] rawPassPhrase, bool clearPassPhrase)
{
SXprUtilities.SkipOpenParenthesis(inputStream);
string text = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (text.Equals("protected-private-key"))
{
SXprUtilities.SkipOpenParenthesis(inputStream);
string text2 = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (text2.Equals("ecc"))
{
SXprUtilities.SkipOpenParenthesis(inputStream);
SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
string text3 = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (Platform.StartsWith(text3, "NIST "))
{
text3 = text3.Substring("NIST ".get_Length());
}
SXprUtilities.SkipCloseParenthesis(inputStream);
SXprUtilities.SkipOpenParenthesis(inputStream);
text = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (text.Equals("q"))
{
byte[] bytes = SXprUtilities.ReadBytes(inputStream, inputStream.ReadByte());
PublicKeyPacket publicKeyPacket = new PublicKeyPacket(PublicKeyAlgorithmTag.ECDsa, global::System.DateTime.get_UtcNow(), new ECDsaPublicBcpgKey(ECNamedCurveTable.GetOid(text3), new BigInteger(1, bytes)));
SXprUtilities.SkipCloseParenthesis(inputStream);
byte[] dValue = GetDValue(inputStream, rawPassPhrase, clearPassPhrase, text3);
return(new PgpSecretKey(new SecretKeyPacket(publicKeyPacket, SymmetricKeyAlgorithmTag.Null, null, null, new ECSecretBcpgKey(new BigInteger(1, dValue)).GetEncoded()), new PgpPublicKey(publicKeyPacket)));
}
throw new PgpException("no q value found");
}
throw new PgpException("no curve details found");
}
throw new PgpException("unknown key type found");
}
internal static PgpSecretKey DoParseSecretKeyFromSExpr(Stream inputStream, byte[] rawPassPhrase, bool clearPassPhrase, PgpPublicKey pubKey)
{
SXprUtilities.SkipOpenParenthesis(inputStream);
string text = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (text.Equals("protected-private-key"))
{
SXprUtilities.SkipOpenParenthesis(inputStream);
string text2 = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (text2.Equals("ecc"))
{
SXprUtilities.SkipOpenParenthesis(inputStream);
SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
string curveName = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
SXprUtilities.SkipCloseParenthesis(inputStream);
SXprUtilities.SkipOpenParenthesis(inputStream);
text = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (text.Equals("q"))
{
SXprUtilities.ReadBytes(inputStream, inputStream.ReadByte());
SXprUtilities.SkipCloseParenthesis(inputStream);
byte[] dValue = GetDValue(inputStream, rawPassPhrase, clearPassPhrase, curveName);
return(new PgpSecretKey(new SecretKeyPacket(pubKey.PublicKeyPacket, SymmetricKeyAlgorithmTag.Null, null, null, new ECSecretBcpgKey(new BigInteger(1, dValue)).GetEncoded()), pubKey));
}
throw new PgpException("no q value found");
}
throw new PgpException("no curve details found");
}
throw new PgpException("unknown key type found");
}
/**
* Parse a secret key from one of the GPG S expression keys associating it with the passed in public key.
*
* @return a secret key object.
*/
public static PgpSecretKey ParseSecretKeyFromSExpr(Stream inputStream, char[] passPhrase, PgpPublicKey pubKey)
{
SXprUtilities.SkipOpenParenthesis(inputStream);
string type = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (type.Equals("protected-private-key"))
{
SXprUtilities.SkipOpenParenthesis(inputStream);
string curveName;
string keyType = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (keyType.Equals("ecc"))
{
SXprUtilities.SkipOpenParenthesis(inputStream);
string curveID = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
curveName = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
SXprUtilities.SkipCloseParenthesis(inputStream);
}
else
{
throw new PgpException("no curve details found");
}
byte[] qVal;
SXprUtilities.SkipOpenParenthesis(inputStream);
type = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (type.Equals("q"))
{
qVal = SXprUtilities.ReadBytes(inputStream, inputStream.ReadByte());
}
else
{
throw new PgpException("no q value found");
}
SXprUtilities.SkipCloseParenthesis(inputStream);
byte[] dValue = GetDValue(inputStream, passPhrase, curveName);
// TODO: check SHA-1 hash.
return(new PgpSecretKey(new SecretKeyPacket(pubKey.PublicKeyPacket, SymmetricKeyAlgorithmTag.Null, null, null,
new ECSecretBcpgKey(new BigInteger(1, dValue)).GetEncoded()), pubKey));
}
throw new PgpException("unknown key type found");
}
private static byte[] GetDValue(Stream inputStream, char[] passPhrase, string curveName)
{
string type;
SXprUtilities.SkipOpenParenthesis(inputStream);
string protection;
S2k s2k;
byte[] iv;
byte[] secKeyData;
type = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
if (type.Equals("protected"))
{
protection = SXprUtilities.ReadString(inputStream, inputStream.ReadByte());
SXprUtilities.SkipOpenParenthesis(inputStream);
s2k = SXprUtilities.ParseS2k(inputStream);
iv = SXprUtilities.ReadBytes(inputStream, inputStream.ReadByte());
SXprUtilities.SkipCloseParenthesis(inputStream);
secKeyData = SXprUtilities.ReadBytes(inputStream, inputStream.ReadByte());
}
else
{
throw new PgpException("protected block not found");
}
// TODO: recognise other algorithms
KeyParameter key = PgpUtilities.MakeKeyFromPassPhrase(SymmetricKeyAlgorithmTag.Aes128, s2k, passPhrase);
byte[] data = RecoverKeyData(SymmetricKeyAlgorithmTag.Aes128, "/CBC/NoPadding", key, iv, secKeyData, 0, secKeyData.Length);
//
// parse the secret key S-expr
//
Stream keyIn = new MemoryStream(data, false);
SXprUtilities.SkipOpenParenthesis(keyIn);
SXprUtilities.SkipOpenParenthesis(keyIn);
SXprUtilities.SkipOpenParenthesis(keyIn);
String name = SXprUtilities.ReadString(keyIn, keyIn.ReadByte());
return(SXprUtilities.ReadBytes(keyIn, keyIn.ReadByte()));
}
