internal ModDetectionCodePacket(
BcpgInputStream bcpgIn)
{
if (bcpgIn == null)
{
throw new ArgumentNullException("bcpgIn");
}
this.digest = new byte[20];
bcpgIn.ReadFully(this.digest);
}
public MPInteger(
BcpgInputStream bcpgIn)
{
if (bcpgIn == null)
{
throw new ArgumentNullException("bcpgIn");
}
int length = (bcpgIn.ReadByte() << 8) | bcpgIn.ReadByte();
byte[] bytes = new byte[(length + 7) / 8];
bcpgIn.ReadFully(bytes);
this.val = new BigInteger(1, bytes);
}
protected static byte[] ReadBytesOfEncodedLength(
BcpgInputStream bcpgIn)
{
int length = bcpgIn.ReadByte();
if (length == 0 || length == 0xFF)
{
throw new IOException("future extensions not yet implemented.");
}
byte[] buffer = new byte[length + 2];
bcpgIn.ReadFully(buffer, 2, buffer.Length - 2);
buffer[0] = (byte)0x06;
buffer[1] = (byte)length;
return(buffer);
}
internal SecretKeyPacket(
BcpgInputStream bcpgIn)
{
if (this is SecretSubkeyPacket)
{
pubKeyPacket = new PublicSubkeyPacket(bcpgIn);
}
else
{
pubKeyPacket = new PublicKeyPacket(bcpgIn);
}
s2kUsage = bcpgIn.ReadByte();
if (s2kUsage == UsageChecksum || s2kUsage == UsageSha1)
{
encAlgorithm = (SymmetricKeyAlgorithmTag)bcpgIn.ReadByte();
s2k = new S2k(bcpgIn);
}
else
{
encAlgorithm = (SymmetricKeyAlgorithmTag)s2kUsage;
}
if (!(s2k != null && s2k.Type == S2k.GnuDummyS2K && s2k.ProtectionMode == 0x01))
{
if (s2kUsage != 0)
{
if (((int)encAlgorithm) < 7)
{
iv = new byte[8];
}
else
{
iv = new byte[16];
}
bcpgIn.ReadFully(iv);
}
}
secKeyData = bcpgIn.ReadAll();
}
/// <param name="bcpgIn">The stream to read the packet from.</param>
public ECDHPublicBcpgKey(
BcpgInputStream bcpgIn)
: base(bcpgIn)
{
int length = bcpgIn.ReadByte();
byte[] kdfParameters = new byte[length];
if (kdfParameters.Length != 3)
{
throw new InvalidOperationException("kdf parameters size of 3 expected.");
}
bcpgIn.ReadFully(kdfParameters);
reserved = kdfParameters[0];
hashFunctionId = (HashAlgorithmTag)kdfParameters[1];
symAlgorithmId = (SymmetricKeyAlgorithmTag)kdfParameters[2];
VerifyHashAlgorithm();
VerifySymmetricKeyAlgorithm();
}
internal SignaturePacket(
BcpgInputStream bcpgIn)
{
version = bcpgIn.ReadByte();
if (version == 3 || version == 2)
{
// int l =
bcpgIn.ReadByte();
signatureType = bcpgIn.ReadByte();
creationTime = (((long)bcpgIn.ReadByte() << 24) | ((long)bcpgIn.ReadByte() << 16)
| ((long)bcpgIn.ReadByte() << 8) | (uint)bcpgIn.ReadByte()) * 1000L;
keyId |= (long)bcpgIn.ReadByte() << 56;
keyId |= (long)bcpgIn.ReadByte() << 48;
keyId |= (long)bcpgIn.ReadByte() << 40;
keyId |= (long)bcpgIn.ReadByte() << 32;
keyId |= (long)bcpgIn.ReadByte() << 24;
keyId |= (long)bcpgIn.ReadByte() << 16;
keyId |= (long)bcpgIn.ReadByte() << 8;
keyId |= (uint)bcpgIn.ReadByte();
keyAlgorithm = (PublicKeyAlgorithmTag)bcpgIn.ReadByte();
hashAlgorithm = (HashAlgorithmTag)bcpgIn.ReadByte();
}
else if (version == 4)
{
signatureType = bcpgIn.ReadByte();
keyAlgorithm = (PublicKeyAlgorithmTag)bcpgIn.ReadByte();
hashAlgorithm = (HashAlgorithmTag)bcpgIn.ReadByte();
int hashedLength = (bcpgIn.ReadByte() << 8) | bcpgIn.ReadByte();
byte[] hashed = new byte[hashedLength];
bcpgIn.ReadFully(hashed);
//
// read the signature sub packet data.
//
SignatureSubpacketsParser sIn = new SignatureSubpacketsParser(
new MemoryStream(hashed, false));
IList v = Platform.CreateArrayList();
SignatureSubpacket sub;
while ((sub = sIn.ReadPacket()) != null)
{
v.Add(sub);
}
hashedData = new SignatureSubpacket[v.Count];
for (int i = 0; i != hashedData.Length; i++)
{
SignatureSubpacket p = (SignatureSubpacket)v[i];
if (p is IssuerKeyId)
{
keyId = ((IssuerKeyId)p).KeyId;
}
else if (p is SignatureCreationTime)
{
creationTime = DateTimeUtilities.DateTimeToUnixMs(
((SignatureCreationTime)p).GetTime());
}
hashedData[i] = p;
}
int unhashedLength = (bcpgIn.ReadByte() << 8) | bcpgIn.ReadByte();
byte[] unhashed = new byte[unhashedLength];
bcpgIn.ReadFully(unhashed);
sIn = new SignatureSubpacketsParser(new MemoryStream(unhashed, false));
v.Clear();
while ((sub = sIn.ReadPacket()) != null)
{
v.Add(sub);
}
unhashedData = new SignatureSubpacket[v.Count];
for (int i = 0; i != unhashedData.Length; i++)
{
SignatureSubpacket p = (SignatureSubpacket)v[i];
if (p is IssuerKeyId)
{
keyId = ((IssuerKeyId)p).KeyId;
}
unhashedData[i] = p;
}
}
else
{
throw new Exception("unsupported version: " + version);
}
fingerprint = new byte[2];
bcpgIn.ReadFully(fingerprint);
switch (keyAlgorithm)
{
case PublicKeyAlgorithmTag.RsaGeneral:
case PublicKeyAlgorithmTag.RsaSign:
MPInteger v = new MPInteger(bcpgIn);
signature = new MPInteger[] { v };
break;
case PublicKeyAlgorithmTag.Dsa:
MPInteger r = new MPInteger(bcpgIn);
MPInteger s = new MPInteger(bcpgIn);
signature = new MPInteger[] { r, s };
break;
case PublicKeyAlgorithmTag.ElGamalEncrypt: // yep, this really does happen sometimes.
case PublicKeyAlgorithmTag.ElGamalGeneral:
MPInteger p = new MPInteger(bcpgIn);
MPInteger g = new MPInteger(bcpgIn);
MPInteger y = new MPInteger(bcpgIn);
signature = new MPInteger[] { p, g, y };
break;
case PublicKeyAlgorithmTag.ECDsa:
MPInteger ecR = new MPInteger(bcpgIn);
MPInteger ecS = new MPInteger(bcpgIn);
signature = new MPInteger[] { ecR, ecS };
break;
default:
if (keyAlgorithm >= PublicKeyAlgorithmTag.Experimental_1 && keyAlgorithm <= PublicKeyAlgorithmTag.Experimental_11)
{
signature = null;
MemoryStream bOut = new MemoryStream();
int ch;
while ((ch = bcpgIn.ReadByte()) >= 0)
{
bOut.WriteByte((byte)ch);
}
signatureEncoding = bOut.ToArray();
}
else
{
throw new IOException("unknown signature key algorithm: " + keyAlgorithm);
}
break;
}
}