public static object QueryContextAttributes(SecurityContext securityContext, ContextAttribute contextAttribute)
{
int cb;
if (contextAttribute != ContextAttribute.Sizes)
{
if (contextAttribute != ContextAttribute.StreamSizes)
{
throw new NotImplementedException();
}
cb = 20;
}
else
{
cb = 16;
}
IntPtr intPtr = Marshal.AllocHGlobal(cb);
object result;
try
{
int num = UnsafeNclNativeMethods.NativeNTSSPI.QueryContextAttributes(ref securityContext.Handle, (int)contextAttribute, intPtr);
if (num != 0)
{
throw new Win32Exception(num);
}
object obj = null;
if (contextAttribute != ContextAttribute.Sizes)
{
if (contextAttribute == ContextAttribute.StreamSizes)
{
obj = new StreamSizes(intPtr);
}
}
else
{
obj = new Sizes(intPtr);
}
result = obj;
}
finally
{
Marshal.FreeHGlobal(intPtr);
}
return(result);
}
internal TcpSecureStream(TcpStream tcpStream, SecurityContext securityContext) : base(tcpStream)
{
if (securityContext == null)
{
throw new ArgumentNullException("securityContext");
}
this.securityContext = securityContext;
try
{
switch (this.securityContext.SecurityContextMode)
{
case SecurityContextMode.block:
{
Sizes sizes = (Sizes)SSPIWrapper.QueryContextAttributes(securityContext, ContextAttribute.Sizes);
this.maxTokenSize = Math.Max(sizes.cbSecurityTrailer, sizes.cbMaxSignature);
this.maxEncryptionBufferSize = Math.Min(sizes.cbMaxToken, 65535);
if (this.maxTokenSize > 65535)
{
throw new XmlaStreamException(XmlaSR.TcpStream_MaxSignatureExceedsProtocolLimit);
}
this.tokenBufferForWrite = new byte[this.maxTokenSize];
this.tokenBufferForRead = new byte[this.maxTokenSize];
this.securityBuffers = new SecurityBufferClass[]
{
new SecurityBufferClass(null, BufferType.Data),
new SecurityBufferClass(this.tokenBufferForWrite, BufferType.Token)
};
break;
}
case SecurityContextMode.stream:
{
this.streamSizes = (StreamSizes)SSPIWrapper.QueryContextAttributes(securityContext, ContextAttribute.StreamSizes);
if (this.streamSizes.cbMaxMessage > 65535)
{
throw new XmlaStreamException(XmlaSR.TcpStream_MaxSignatureExceedsProtocolLimit);
}
this.streamHeaderForWrite = new ArraySegment <byte>(new byte[this.streamSizes.cbHeader]);
this.streamTrailerForWrite = new ArraySegment <byte>(new byte[this.streamSizes.cbTrailer]);
this.streamEncryptedDataAccumulatorForRead = new List <ArraySegment <byte> >();
this.streamEncryptedDataAccumulatorForReadFreeBuffers = new List <ArraySegment <byte> >();
this.streamDecryptedDataForRead = new List <ArraySegment <byte> >();
SecurityBufferClass securityBufferClass = new SecurityBufferClass(this.streamHeaderForWrite.Array, BufferType.Header);
SecurityBufferClass securityBufferClass2 = new SecurityBufferClass(null, BufferType.Data);
SecurityBufferClass securityBufferClass3 = new SecurityBufferClass(this.streamTrailerForWrite.Array, BufferType.Trailer);
SecurityBufferClass securityBufferClass4 = new SecurityBufferClass(null, BufferType.Empty);
this.securityBuffers = new SecurityBufferClass[]
{
securityBufferClass,
securityBufferClass2,
securityBufferClass3,
securityBufferClass4
};
break;
}
default:
throw new XmlaStreamException("SecurityContextMode " + this.securityContext.SecurityContextMode + " not configured!");
}
}
catch (XmlaStreamException)
{
throw;
}
catch (IOException innerException)
{
throw new XmlaStreamException(innerException);
}
catch (SocketException innerException2)
{
throw new XmlaStreamException(innerException2);
}
catch (Win32Exception innerException3)
{
throw new XmlaStreamException(innerException3);
}
}