public byte[] DecryptMessage(int messageLength, byte[] encryptedBytes)
{
using var inputBuffer = new GssInputBuffer(encryptedBytes);
using var outputBuffer = new GssOutputBuffer();
var majorStatus = NativeMethods.gss_unwrap(out uint minorStatus, handle, inputBuffer, outputBuffer, out int _, out int _);
Gss.ThrowIfError(majorStatus, minorStatus);
return(outputBuffer.ToByteArray());
}
public byte[] EncryptMessage(byte[] plainTextBytes)
{
using var inputBuffer = new GssInputBuffer(plainTextBytes);
using var outputBuffer = new GssOutputBuffer();
var majorStatus = NativeMethods.gss_wrap(out uint minorStatus, handle, 0, 0, inputBuffer, out int _, outputBuffer);
Gss.ThrowIfError(majorStatus, minorStatus);
return(outputBuffer.ToByteArray());
}
public byte[] Next(byte[] challenge)
{
using var inputToken = new GssInputBuffer(challenge);
using var outputToken = new GssOutputBuffer();
const GssFlags authenticationFlags = GssFlags.GSS_C_MUTUAL_FLAG | GssFlags.GSS_C_SEQUENCE_FLAG;
var majorStatus = NativeMethods.gss_init_sec_context(out var minorStatus, _credential, in handle, _servicePrincipalName, IntPtr.Zero, authenticationFlags, 0, IntPtr.Zero, inputToken, out var _, outputToken, out var _, out var _);
Gss.ThrowIfError(majorStatus, minorStatus);
_isInitialized = true;
return(outputToken.ToByteArray());
}