internal static unsafe int AcceptSecurityContext(
ref SafeFreeCredentials?inCredentials,
ref SafeDeleteSslContext?refContext,
Interop.SspiCli.ContextFlags inFlags,
Interop.SspiCli.Endianness endianness,
InputSecurityBuffers inSecBuffers,
ref SecurityBuffer outSecBuffer,
ref Interop.SspiCli.ContextFlags outFlags)
{
if (NetEventSource.IsEnabled)
{
NetEventSource.Enter(null, $"credential={inCredentials}, refContext={refContext}, inFlags={inFlags}");
}
if (inCredentials == null)
{
throw new ArgumentNullException(nameof(inCredentials));
}
Debug.Assert(inSecBuffers.Count <= 3);
Interop.SspiCli.SecBufferDesc inSecurityBufferDescriptor = new Interop.SspiCli.SecBufferDesc(inSecBuffers.Count);
Interop.SspiCli.SecBufferDesc outSecurityBufferDescriptor = new Interop.SspiCli.SecBufferDesc(count: 2);
// Actually, this is returned in outFlags.
bool isSspiAllocated = (inFlags & Interop.SspiCli.ContextFlags.AllocateMemory) != 0 ? true : false;
int errorCode = -1;
bool isContextAbsent = true;
if (refContext != null)
{
isContextAbsent = refContext._handle.IsZero;
}
// Optional output buffer that may need to be freed.
SafeFreeContextBuffer? outFreeContextBuffer = null;
Span <Interop.SspiCli.SecBuffer> outUnmanagedBuffer = stackalloc Interop.SspiCli.SecBuffer[2];
outUnmanagedBuffer[1].pvBuffer = IntPtr.Zero;
try
{
// Allocate always maximum to allow better code optimization.
Span <Interop.SspiCli.SecBuffer> inUnmanagedBuffer = stackalloc Interop.SspiCli.SecBuffer[3];
fixed(void *inUnmanagedBufferPtr = inUnmanagedBuffer)
fixed(void *outUnmanagedBufferPtr = outUnmanagedBuffer)
fixed(void *pinnedToken0 = inSecBuffers._item0.Token)
fixed(void *pinnedToken1 = inSecBuffers._item1.Token)
fixed(void *pinnedToken2 = inSecBuffers._item2.Token)
{
inSecurityBufferDescriptor.pBuffers = inUnmanagedBufferPtr;
// Updated pvBuffer with pinned address. UnmanagedToken takes precedence.
if (inSecBuffers.Count > 2)
{
inUnmanagedBuffer[2].BufferType = inSecBuffers._item2.Type;
inUnmanagedBuffer[2].cbBuffer = inSecBuffers._item2.Token.Length;
inUnmanagedBuffer[2].pvBuffer = inSecBuffers._item2.UnmanagedToken != null ?
(IntPtr)inSecBuffers._item2.UnmanagedToken.DangerousGetHandle() :
(IntPtr)pinnedToken2;
}
if (inSecBuffers.Count > 1)
{
inUnmanagedBuffer[1].BufferType = inSecBuffers._item1.Type;
inUnmanagedBuffer[1].cbBuffer = inSecBuffers._item1.Token.Length;
inUnmanagedBuffer[1].pvBuffer = inSecBuffers._item1.UnmanagedToken != null ?
(IntPtr)inSecBuffers._item1.UnmanagedToken.DangerousGetHandle() :
(IntPtr)pinnedToken1;
}
if (inSecBuffers.Count > 0)
{
inUnmanagedBuffer[0].BufferType = inSecBuffers._item0.Type;
inUnmanagedBuffer[0].cbBuffer = inSecBuffers._item0.Token.Length;
inUnmanagedBuffer[0].pvBuffer = inSecBuffers._item0.UnmanagedToken != null ?
(IntPtr)inSecBuffers._item0.UnmanagedToken.DangerousGetHandle() :
(IntPtr)pinnedToken0;
}
fixed(byte *pinnedOutBytes = outSecBuffer.token)
{
// Fix Descriptor pointer that points to unmanaged SecurityBuffers.
outSecurityBufferDescriptor.pBuffers = outUnmanagedBufferPtr;
// Copy the SecurityBuffer content into unmanaged place holder.
outUnmanagedBuffer[0].cbBuffer = outSecBuffer.size;
outUnmanagedBuffer[0].BufferType = outSecBuffer.type;
outUnmanagedBuffer[0].pvBuffer = outSecBuffer.token == null || outSecBuffer.token.Length == 0 ?
IntPtr.Zero :
(IntPtr)(pinnedOutBytes + outSecBuffer.offset);
outUnmanagedBuffer[1].cbBuffer = 0;
outUnmanagedBuffer[1].BufferType = SecurityBufferType.SECBUFFER_ALERT;
if (isSspiAllocated)
{
outFreeContextBuffer = SafeFreeContextBuffer.CreateEmptyHandle();
}
if (refContext == null || refContext.IsInvalid)
{
// Previous versions unconditionally built a new "refContext" here, but would pass
// incorrect arguments to AcceptSecurityContext in cases where an "contextHandle" was
// already present and non-zero.
if (isContextAbsent)
{
refContext = new SafeDeleteSslContext();
}
}
errorCode = MustRunAcceptSecurityContext_SECURITY(
ref inCredentials,
isContextAbsent,
&inSecurityBufferDescriptor,
inFlags,
endianness,
refContext !,
ref outSecurityBufferDescriptor,
ref outFlags,
outFreeContextBuffer);
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(null, "Marshaling OUT buffer");
}
// No data written out but there is Alert
if (outUnmanagedBuffer[0].cbBuffer == 0 && outUnmanagedBuffer[1].cbBuffer > 0)
{
outSecBuffer.size = outUnmanagedBuffer[1].cbBuffer;
outSecBuffer.type = outUnmanagedBuffer[1].BufferType;
outSecBuffer.token = new Span <byte>((byte *)outUnmanagedBuffer[1].pvBuffer, outUnmanagedBuffer[1].cbBuffer).ToArray();
}
else
{
outSecBuffer.size = outUnmanagedBuffer[0].cbBuffer;
outSecBuffer.type = outUnmanagedBuffer[0].BufferType;
outSecBuffer.token = outUnmanagedBuffer[0].cbBuffer > 0 ?
new Span <byte>((byte *)outUnmanagedBuffer[0].pvBuffer, outUnmanagedBuffer[0].cbBuffer).ToArray() :
null;
}
}
}
}
finally
{
outFreeContextBuffer?.Dispose();
if (outUnmanagedBuffer[1].pvBuffer != IntPtr.Zero)
{
Interop.SspiCli.FreeContextBuffer(outUnmanagedBuffer[1].pvBuffer);
}
}
if (NetEventSource.IsEnabled)
{
NetEventSource.Exit(null, $"errorCode:0x{errorCode:x8}, refContext:{refContext}");
}
return(errorCode);
}
//-------------------------------------------------------------------
internal unsafe static int AcceptSecurityContext(
ref SafeFreeCredentials inCredentials,
ref SafeDeleteContext refContext,
Interop.Secur32.ContextFlags inFlags,
Interop.Secur32.Endianness endianness,
SecurityBuffer inSecBuffer,
SecurityBuffer[] inSecBuffers,
SecurityBuffer outSecBuffer,
ref Interop.Secur32.ContextFlags outFlags)
{
#if TRACE_VERBOSE
GlobalLog.Enter("SafeDeleteContext::AcceptSecurityContex");
GlobalLog.Print(" credential = " + inCredentials.ToString());
GlobalLog.Print(" refContext = " + Logging.ObjectToString(refContext));
GlobalLog.Print(" inFlags = " + inFlags);
if (inSecBuffers == null)
{
GlobalLog.Print(" inSecBuffers = (null)");
}
else
{
GlobalLog.Print(" inSecBuffers[] = length:" + inSecBuffers.Length);
}
#endif
GlobalLog.Assert(outSecBuffer != null, "SafeDeleteContext::AcceptSecurityContext()|outSecBuffer != null");
GlobalLog.Assert(inSecBuffer == null || inSecBuffers == null, "SafeDeleteContext::AcceptSecurityContext()|inSecBuffer == null || inSecBuffers == null");
if (inCredentials == null)
{
throw new ArgumentNullException("inCredentials");
}
Interop.Secur32.SecurityBufferDescriptor inSecurityBufferDescriptor = null;
if (inSecBuffer != null)
{
inSecurityBufferDescriptor = new Interop.Secur32.SecurityBufferDescriptor(1);
}
else if (inSecBuffers != null)
{
inSecurityBufferDescriptor = new Interop.Secur32.SecurityBufferDescriptor(inSecBuffers.Length);
}
Interop.Secur32.SecurityBufferDescriptor outSecurityBufferDescriptor = new Interop.Secur32.SecurityBufferDescriptor(1);
// Actually, this is returned in outFlags.
bool isSspiAllocated = (inFlags & Interop.Secur32.ContextFlags.AllocateMemory) != 0 ? true : false;
int errorCode = -1;
Interop.Secur32.SSPIHandle contextHandle = new Interop.Secur32.SSPIHandle();
if (refContext != null)
{
contextHandle = refContext._handle;
}
// These are pinned user byte arrays passed along with SecurityBuffers.
GCHandle[] pinnedInBytes = null;
GCHandle pinnedOutBytes = new GCHandle();
// Optional output buffer that may need to be freed.
SafeFreeContextBuffer outFreeContextBuffer = null;
try
{
pinnedOutBytes = GCHandle.Alloc(outSecBuffer.token, GCHandleType.Pinned);
var inUnmanagedBuffer = new Interop.Secur32.SecurityBufferStruct[inSecurityBufferDescriptor == null ? 1 : inSecurityBufferDescriptor.Count];
fixed(void *inUnmanagedBufferPtr = inUnmanagedBuffer)
{
if (inSecurityBufferDescriptor != null)
{
// Fix Descriptor pointer that points to unmanaged SecurityBuffers.
inSecurityBufferDescriptor.UnmanagedPointer = inUnmanagedBufferPtr;
pinnedInBytes = new GCHandle[inSecurityBufferDescriptor.Count];
SecurityBuffer securityBuffer;
for (int index = 0; index < inSecurityBufferDescriptor.Count; ++index)
{
securityBuffer = inSecBuffer != null ? inSecBuffer : inSecBuffers[index];
if (securityBuffer != null)
{
// Copy the SecurityBuffer content into unmanaged place holder.
inUnmanagedBuffer[index].count = securityBuffer.size;
inUnmanagedBuffer[index].type = securityBuffer.type;
// Use the unmanaged token if it's not null; otherwise use the managed buffer.
if (securityBuffer.unmanagedToken != null)
{
inUnmanagedBuffer[index].token = securityBuffer.unmanagedToken.DangerousGetHandle();
}
else if (securityBuffer.token == null || securityBuffer.token.Length == 0)
{
inUnmanagedBuffer[index].token = IntPtr.Zero;
}
else
{
pinnedInBytes[index] = GCHandle.Alloc(securityBuffer.token, GCHandleType.Pinned);
inUnmanagedBuffer[index].token = Marshal.UnsafeAddrOfPinnedArrayElement(securityBuffer.token, securityBuffer.offset);
}
#if TRACE_VERBOSE
GlobalLog.Print("SecBuffer: cbBuffer:" + securityBuffer.size + " BufferType:" + securityBuffer.type);
#endif
}
}
}
var outUnmanagedBuffer = new Interop.Secur32.SecurityBufferStruct[1];
fixed(void *outUnmanagedBufferPtr = outUnmanagedBuffer)
{
// Fix Descriptor pointer that points to unmanaged SecurityBuffers.
outSecurityBufferDescriptor.UnmanagedPointer = outUnmanagedBufferPtr;
// Copy the SecurityBuffer content into unmanaged place holder.
outUnmanagedBuffer[0].count = outSecBuffer.size;
outUnmanagedBuffer[0].type = outSecBuffer.type;
if (outSecBuffer.token == null || outSecBuffer.token.Length == 0)
{
outUnmanagedBuffer[0].token = IntPtr.Zero;
}
else
{
outUnmanagedBuffer[0].token = Marshal.UnsafeAddrOfPinnedArrayElement(outSecBuffer.token, outSecBuffer.offset);
}
if (isSspiAllocated)
{
outFreeContextBuffer = SafeFreeContextBuffer.CreateEmptyHandle();
}
if (refContext == null || refContext.IsInvalid)
{
refContext = new SafeDeleteContext_SECURITY();
}
errorCode = MustRunAcceptSecurityContext_SECURITY(
ref inCredentials,
contextHandle.IsZero ? null : &contextHandle,
inSecurityBufferDescriptor,
inFlags,
endianness,
refContext,
outSecurityBufferDescriptor,
ref outFlags,
outFreeContextBuffer);
GlobalLog.Print("SafeDeleteContext:AcceptSecurityContext Marshalling OUT buffer");
// Get unmanaged buffer with index 0 as the only one passed into PInvoke.
outSecBuffer.size = outUnmanagedBuffer[0].count;
outSecBuffer.type = outUnmanagedBuffer[0].type;
if (outSecBuffer.size > 0)
{
outSecBuffer.token = new byte[outSecBuffer.size];
Marshal.Copy(outUnmanagedBuffer[0].token, outSecBuffer.token, 0, outSecBuffer.size);
}
else
{
outSecBuffer.token = null;
}
}
}
}
finally
{
if (pinnedInBytes != null)
{
for (int index = 0; index < pinnedInBytes.Length; index++)
{
if (pinnedInBytes[index].IsAllocated)
{
pinnedInBytes[index].Free();
}
}
}
if (pinnedOutBytes.IsAllocated)
{
pinnedOutBytes.Free();
}
if (outFreeContextBuffer != null)
{
outFreeContextBuffer.Dispose();
}
}
GlobalLog.Leave("SafeDeleteContext::AcceptSecurityContex() unmanaged AcceptSecurityContex()", "errorCode:0x" + errorCode.ToString("x8") + " refContext:" + Logging.ObjectToString(refContext));
return(errorCode);
}
internal static unsafe int InitializeSecurityContext(
ref SafeFreeCredentials?inCredentials,
ref SafeDeleteSslContext?refContext,
string?targetName,
Interop.SspiCli.ContextFlags inFlags,
Interop.SspiCli.Endianness endianness,
InputSecurityBuffers inSecBuffers,
ref SecurityBuffer outSecBuffer,
ref Interop.SspiCli.ContextFlags outFlags)
{
if (NetEventSource.IsEnabled)
{
NetEventSource.Enter(null, $"credential:{inCredentials}, crefContext:{refContext}, targetName:{targetName}, inFlags:{inFlags}, endianness:{endianness}");
}
if (inCredentials == null)
{
throw new ArgumentNullException(nameof(inCredentials));
}
Debug.Assert(inSecBuffers.Count <= 3);
Interop.SspiCli.SecBufferDesc inSecurityBufferDescriptor = new Interop.SspiCli.SecBufferDesc(inSecBuffers.Count);
Interop.SspiCli.SecBufferDesc outSecurityBufferDescriptor = new Interop.SspiCli.SecBufferDesc(1);
// Actually, this is returned in outFlags.
bool isSspiAllocated = (inFlags & Interop.SspiCli.ContextFlags.AllocateMemory) != 0 ? true : false;
int errorCode = -1;
bool isContextAbsent = true;
if (refContext != null)
{
isContextAbsent = refContext._handle.IsZero;
}
// Optional output buffer that may need to be freed.
SafeFreeContextBuffer?outFreeContextBuffer = null;
try
{
Span <Interop.SspiCli.SecBuffer> inUnmanagedBuffer = stackalloc Interop.SspiCli.SecBuffer[3];
fixed(void *inUnmanagedBufferPtr = inUnmanagedBuffer)
fixed(void *pinnedToken0 = inSecBuffers._item0.Token)
fixed(void *pinnedToken1 = inSecBuffers._item1.Token)
fixed(void *pinnedToken2 = inSecBuffers._item2.Token)
{
// Fix Descriptor pointer that points to unmanaged SecurityBuffers.
inSecurityBufferDescriptor.pBuffers = inUnmanagedBufferPtr;
// Updated pvBuffer with pinned address. UnmanagedToken takes precedence.
if (inSecBuffers.Count > 2)
{
inUnmanagedBuffer[2].BufferType = inSecBuffers._item2.Type;
inUnmanagedBuffer[2].cbBuffer = inSecBuffers._item2.Token.Length;
inUnmanagedBuffer[2].pvBuffer = inSecBuffers._item2.UnmanagedToken != null ?
(IntPtr)inSecBuffers._item2.UnmanagedToken.DangerousGetHandle() :
(IntPtr)pinnedToken2;
}
if (inSecBuffers.Count > 1)
{
inUnmanagedBuffer[1].BufferType = inSecBuffers._item1.Type;
inUnmanagedBuffer[1].cbBuffer = inSecBuffers._item1.Token.Length;
inUnmanagedBuffer[1].pvBuffer = inSecBuffers._item1.UnmanagedToken != null ?
(IntPtr)inSecBuffers._item1.UnmanagedToken.DangerousGetHandle() :
(IntPtr)pinnedToken1;
}
if (inSecBuffers.Count > 0)
{
inUnmanagedBuffer[0].BufferType = inSecBuffers._item0.Type;
inUnmanagedBuffer[0].cbBuffer = inSecBuffers._item0.Token.Length;
inUnmanagedBuffer[0].pvBuffer = inSecBuffers._item0.UnmanagedToken != null ?
(IntPtr)inSecBuffers._item0.UnmanagedToken.DangerousGetHandle() :
(IntPtr)pinnedToken0;
}
fixed(byte *pinnedOutBytes = outSecBuffer.token)
{
// Fix Descriptor pointer that points to unmanaged SecurityBuffers.
Interop.SspiCli.SecBuffer outUnmanagedBuffer = default;
outSecurityBufferDescriptor.pBuffers = &outUnmanagedBuffer;
outUnmanagedBuffer.cbBuffer = outSecBuffer.size;
outUnmanagedBuffer.BufferType = outSecBuffer.type;
outUnmanagedBuffer.pvBuffer = outSecBuffer.token == null || outSecBuffer.token.Length == 0 ?
IntPtr.Zero :
(IntPtr)(pinnedOutBytes + outSecBuffer.offset);
if (isSspiAllocated)
{
outFreeContextBuffer = SafeFreeContextBuffer.CreateEmptyHandle();
}
if (refContext == null || refContext.IsInvalid)
{
// Previous versions unconditionally built a new "refContext" here, but would pass
// incorrect arguments to InitializeSecurityContextW in cases where an "contextHandle" was
// already present and non-zero.
if (isContextAbsent)
{
refContext = new SafeDeleteSslContext();
}
}
if (targetName == null || targetName.Length == 0)
{
targetName = dummyStr;
}
string punyCode = s_idnMapping.GetAscii(targetName);
fixed(char *namePtr = punyCode)
{
errorCode = MustRunInitializeSecurityContext(
ref inCredentials,
isContextAbsent,
(byte *)(((object)targetName == (object)dummyStr) ? null : namePtr),
inFlags,
endianness,
&inSecurityBufferDescriptor,
refContext !,
ref outSecurityBufferDescriptor,
ref outFlags,
outFreeContextBuffer);
}
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(null, "Marshalling OUT buffer");
}
// Get unmanaged buffer with index 0 as the only one passed into PInvoke.
outSecBuffer.size = outUnmanagedBuffer.cbBuffer;
outSecBuffer.type = outUnmanagedBuffer.BufferType;
outSecBuffer.token = outSecBuffer.size > 0 ?
new Span <byte>((byte *)outUnmanagedBuffer.pvBuffer, outUnmanagedBuffer.cbBuffer).ToArray() :
null;
}
}
}
finally
{
outFreeContextBuffer?.Dispose();
}
if (NetEventSource.IsEnabled)
{
NetEventSource.Exit(null, $"errorCode:0x{errorCode:x8}, refContext:{refContext}");
}
return(errorCode);
}