public void EncryptMessage(byte[] message, out byte[] encryptedBuffer)
{
encryptedBuffer = null;
SecPkgContext_Sizes ContextSizes = new SecPkgContext_Sizes();
if (QueryContextAttributes(ref _hContext, SECPKG_ATTR_SIZES, out ContextSizes) != SEC_E_OK)
{
throw new Exception("QueryContextAttribute() failed!!!");
}
MultipleSecBufferHelper[] ThisSecHelper = new MultipleSecBufferHelper[2];
ThisSecHelper[0] = new MultipleSecBufferHelper(message, SecBufferType.SECBUFFER_DATA);
ThisSecHelper[1] = new MultipleSecBufferHelper(new byte[ContextSizes.cbSecurityTrailer], SecBufferType.SECBUFFER_TOKEN);
SecBufferDesc DescBuffer = new SecBufferDesc(ThisSecHelper);
try
{
if (EncryptMessage(ref _hContext, 0, ref DescBuffer, 0) != SEC_E_OK)
{
throw new Exception("EncryptMessage() failed!!!");
}
encryptedBuffer = DescBuffer.GetSecBufferByteArray();
}
finally
{
DescBuffer.Dispose();
}
}
public void DecryptMessage(int messageLength, byte[] encryptedBuffer, bool bUseClientContext,
out byte[] decryptedBuffer)
{
decryptedBuffer = null;
SECURITY_HANDLE DecryptionContext = _hContext;
if (bUseClientContext)
{
DecryptionContext = _hContext;
}
byte[] EncryptedMessage = new byte[messageLength];
Array.Copy(encryptedBuffer, 0, EncryptedMessage, 0, messageLength);
int SecurityTrailerLength = encryptedBuffer.Length - messageLength;
byte[] SecurityTrailer = new byte[SecurityTrailerLength];
Array.Copy(encryptedBuffer, messageLength, SecurityTrailer, 0, SecurityTrailerLength);
MultipleSecBufferHelper[] ThisSecHelper = new MultipleSecBufferHelper[2];
ThisSecHelper[0] = new MultipleSecBufferHelper(EncryptedMessage, SecBufferType.SECBUFFER_DATA);
ThisSecHelper[1] = new MultipleSecBufferHelper(SecurityTrailer, SecBufferType.SECBUFFER_TOKEN);
SecBufferDesc DescBuffer = new SecBufferDesc(ThisSecHelper);
try
{
uint EncryptionQuality = 0;
if (DecryptMessage(ref DecryptionContext, ref DescBuffer, 0, out EncryptionQuality) != SEC_E_OK)
{
throw new Exception("DecryptMessage() failed!!!");
}
decryptedBuffer = new byte[messageLength];
Array.Copy(DescBuffer.GetSecBufferByteArray(), 0, decryptedBuffer, 0, messageLength);
}
finally
{
DescBuffer.Dispose();
}
}
public void VerifyMessage(int messageLength, byte[] signedBuffer, out byte[] verifiedBuffer)
{
verifiedBuffer = null;
byte[] SignedMessage = new byte[messageLength];
Array.Copy(signedBuffer, 0, SignedMessage, 0, messageLength);
int SignatureLength = signedBuffer.Length - messageLength;
byte[] Signature = new byte[SignatureLength];
Array.Copy(signedBuffer, messageLength, Signature, 0, SignatureLength);
MultipleSecBufferHelper[] ThisSecHelper = new MultipleSecBufferHelper[2];
ThisSecHelper[0] = new MultipleSecBufferHelper(SignedMessage, SecBufferType.SECBUFFER_DATA);
ThisSecHelper[1] = new MultipleSecBufferHelper(Signature, SecBufferType.SECBUFFER_TOKEN);
SecBufferDesc DescBuffer = new SecBufferDesc(ThisSecHelper);
try
{
uint EncryptionQuality = 0;
int Return = VerifySignature(ref _hContext, ref DescBuffer, 0, out EncryptionQuality);
if (Return != SEC_E_OK)
{
throw new Exception("VerifySignature() failed!!!");
}
verifiedBuffer = new byte[messageLength];
Array.Copy(DescBuffer.GetSecBufferByteArray(), 0, verifiedBuffer, 0, messageLength);
}
finally
{
DescBuffer.Dispose();
}
}
public void SignMessage(byte[] message, out byte[] signedBuffer)
{
signedBuffer = null;
SecPkgContext_Sizes ContextSizes = new SecPkgContext_Sizes();
if (QueryContextAttributes(ref _hContext, SECPKG_ATTR_SIZES, out ContextSizes) != SEC_E_OK)
{
throw new Exception("QueryContextAttribute() failed!!!");
}
MultipleSecBufferHelper[] ThisSecHelper = new MultipleSecBufferHelper[2];
ThisSecHelper[0] = new MultipleSecBufferHelper(message, SecBufferType.SECBUFFER_DATA);
ThisSecHelper[1] = new MultipleSecBufferHelper(new byte[ContextSizes.cbMaxSignature], SecBufferType.SECBUFFER_TOKEN);
SecBufferDesc DescBuffer = new SecBufferDesc(ThisSecHelper);
try
{
if (MakeSignature(ref _hContext, 0, ref DescBuffer, 0) != SEC_E_OK)
{
throw new Exception("MakeSignature() failed!!!");
}
//SSPIHelper.SignAndVerify(ref _hClientContext,ref hServerContext,ref DescBuffer);
uint EncryptionQuality = 0;
VerifySignature(ref this._hContext, ref DescBuffer, 0, out EncryptionQuality);
signedBuffer = DescBuffer.GetSecBufferByteArray();
}
finally
{
DescBuffer.Dispose();
}
}
