103 lines
3.5 KiB
C#
103 lines
3.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using NSspi.Buffers;
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using NSspi.Credentials;
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namespace NSspi.Contexts
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{
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public class ServerContext : Context
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{
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private ContextAttrib requestedAttribs;
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private ContextAttrib finalAttribs;
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private bool complete;
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public ServerContext(ServerCredential cred, ContextAttrib requestedAttribs) : base ( cred )
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{
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this.requestedAttribs = requestedAttribs;
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this.finalAttribs = ContextAttrib.Zero;
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}
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public SecurityStatus AcceptToken( byte[] clientToken, out byte[] nextToken )
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{
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SecureBuffer clientBuffer = new SecureBuffer( clientToken, BufferType.Token );
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SecureBuffer outBuffer = new SecureBuffer( new byte[12288], BufferType.Token );
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SecurityStatus status;
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long expiry = 0;
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SecureBufferAdapter clientAdapter;
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SecureBufferAdapter outAdapter;
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using ( clientAdapter = new SecureBufferAdapter( clientBuffer ) )
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{
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using ( outAdapter = new SecureBufferAdapter( outBuffer ) )
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{
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if( this.ContextHandle.IsInvalid )
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{
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status = ContextNativeMethods.AcceptSecurityContext_1(
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ref this.Credential.Handle.rawHandle,
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IntPtr.Zero,
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clientAdapter.Handle,
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requestedAttribs,
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SecureBufferDataRep.Network,
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ref this.ContextHandle.rawHandle,
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outAdapter.Handle,
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ref this.finalAttribs,
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ref expiry
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);
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}
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else
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{
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status = ContextNativeMethods.AcceptSecurityContext_2(
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ref this.Credential.Handle.rawHandle,
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ref this.ContextHandle.rawHandle,
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clientAdapter.Handle,
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requestedAttribs,
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SecureBufferDataRep.Network,
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ref this.ContextHandle.rawHandle,
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outAdapter.Handle,
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ref this.finalAttribs,
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ref expiry
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);
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}
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}
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}
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if ( status == SecurityStatus.OK )
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{
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nextToken = null;
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this.complete = true;
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if ( outBuffer.Length != 0 )
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{
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nextToken = new byte[outBuffer.Length];
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Array.Copy( outBuffer.Buffer, nextToken, nextToken.Length );
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}
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else
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{
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nextToken = null;
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}
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}
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else if ( status == SecurityStatus.ContinueNeeded )
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{
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this.complete = false;
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nextToken = new byte[outBuffer.Length];
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Array.Copy( outBuffer.Buffer, nextToken, nextToken.Length );
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}
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else
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{
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throw new SSPIException( "Failed to call AcceptSecurityContext", status );
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}
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return status;
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}
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}
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}
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