public static ClientHello CreateFromSSL2CompatibleData(ProtocolVersion ver, byte[] buffer, int offset, uint length)
{
ClientHello msg = new ClientHello(ver);
int cipherLen = BitConverterBE.ReadUInt16AndMoveOffset(buffer, ref offset) / 3;
ushort sessionIdLen = BitConverterBE.ReadUInt16AndMoveOffset(buffer, ref offset);
if (sessionIdLen != 0 && sessionIdLen != 16)
{
throw new Exception();
}
ushort challengeLen = BitConverterBE.ReadUInt16AndMoveOffset(buffer, ref offset);
if (challengeLen < 16)
{
throw new Exception();
}
if (challengeLen > RandomData.Size)
{
challengeLen = RandomData.Size;
}
msg._cipherSuites = new CipherSuite[cipherLen];
for (int i = 0; i < cipherLen; i++)
{
msg._cipherSuites[i] = (CipherSuite)BitConverterBE.ReadUInt24AndMoveOffset(buffer, ref offset);
}
msg._sessionId = new byte[sessionIdLen];
Buffer.BlockCopy(buffer, offset, msg._sessionId, 0, sessionIdLen);
offset += sessionIdLen;
msg._random = new byte[RandomData.Size];
Buffer.BlockCopy(buffer, offset, msg._random, 0, challengeLen);
return(msg);
}
public static ClientHello CreateFromSSL2CompatibleData(ProtocolVersion ver, byte[] buffer, int offset, uint length)
{
ClientHello msg = new ClientHello (ver);
int cipherLen = BitConverterBE.ReadUInt16AndMoveOffset (buffer, ref offset) / 3;
ushort sessionIdLen = BitConverterBE.ReadUInt16AndMoveOffset (buffer, ref offset);
if (sessionIdLen != 0 && sessionIdLen != 16)
throw new Exception ();
ushort challengeLen = BitConverterBE.ReadUInt16AndMoveOffset (buffer, ref offset);
if (challengeLen < 16)
throw new Exception ();
if (challengeLen > RandomData.Size)
challengeLen = RandomData.Size;
msg._cipherSuites = new CipherSuite[cipherLen];
for (int i = 0; i < cipherLen; i ++)
msg._cipherSuites[i] = (CipherSuite)BitConverterBE.ReadUInt24AndMoveOffset (buffer, ref offset);
msg._sessionId = new byte[sessionIdLen];
Buffer.BlockCopy (buffer, offset, msg._sessionId, 0, sessionIdLen);
offset += sessionIdLen;
msg._random = new byte[RandomData.Size];
Buffer.BlockCopy (buffer, offset, msg._random, 0, challengeLen);
return msg;
}