private static bool GssInitSecurityContext(
ref SafeGssContextHandle context,
SafeGssCredHandle credential,
bool isNtlm,
SafeGssNameHandle targetName,
Interop.NetSecurityNative.GssFlags inFlags,
byte[] buffer,
out byte[] outputBuffer,
out uint outFlags,
out int isNtlmUsed)
{
outputBuffer = null;
outFlags = 0;
// EstablishSecurityContext is called multiple times in a session.
// In each call, we need to pass the context handle from the previous call.
// For the first call, the context handle will be null.
if (context == null)
{
context = new SafeGssContextHandle();
}
Interop.NetSecurityNative.GssBuffer token = default(Interop.NetSecurityNative.GssBuffer);
Interop.NetSecurityNative.Status status;
try
{
Interop.NetSecurityNative.Status minorStatus;
status = Interop.NetSecurityNative.InitSecContext(out minorStatus,
credential,
ref context,
isNtlm,
targetName,
(uint)inFlags,
buffer,
(buffer == null) ? 0 : buffer.Length,
ref token,
out outFlags,
out isNtlmUsed);
if ((status != Interop.NetSecurityNative.Status.GSS_S_COMPLETE) && (status != Interop.NetSecurityNative.Status.GSS_S_CONTINUE_NEEDED))
{
throw new Interop.NetSecurityNative.GssApiException(status, minorStatus);
}
outputBuffer = token.ToByteArray();
}
finally
{
token.Dispose();
}
return(status == Interop.NetSecurityNative.Status.GSS_S_COMPLETE);
}
internal static Interop.NetSecurityNative.GssFlags GetInteropFromContextFlagsPal(ContextFlagsPal flags)
{
Interop.NetSecurityNative.GssFlags gssFlags = 0;
foreach (ContextFlagMapping mapping in s_contextFlagMapping)
{
if ((flags & mapping.ContextFlag) == mapping.ContextFlag)
{
gssFlags |= mapping.GssFlags;
}
}
return(gssFlags);
}
internal static ContextFlagsPal GetContextFlagsPalFromInterop(Interop.NetSecurityNative.GssFlags gssFlags)
{
ContextFlagsPal flags = ContextFlagsPal.None;
foreach (ContextFlagMapping mapping in s_contextFlagMapping)
{
if ((gssFlags & mapping.GssFlags) == mapping.GssFlags)
{
flags |= mapping.ContextFlag;
}
}
return(flags);
}
internal static Interop.NetSecurityNative.GssFlags GetInteropFromContextFlagsPal(ContextFlagsPal flags, bool isServer)
{
Interop.NetSecurityNative.GssFlags gssFlags = 0;
// GSS_C_IDENTIFY_FLAG is set if either AcceptIdentify (used by server) or InitIdentify (used by client) is set
if (isServer)
{
if ((flags & ContextFlagsPal.AcceptIdentify) != 0)
{
gssFlags |= Interop.NetSecurityNative.GssFlags.GSS_C_IDENTIFY_FLAG;
}
}
else
{
if ((flags & ContextFlagsPal.InitIdentify) != 0)
{
gssFlags |= Interop.NetSecurityNative.GssFlags.GSS_C_IDENTIFY_FLAG;
}
}
// GSS_C_INTEG_FLAG is set if either AcceptIntegrity (used by server) or InitIntegrity (used by client) is set
if (isServer)
{
if ((flags & ContextFlagsPal.AcceptIntegrity) != 0)
{
gssFlags |= Interop.NetSecurityNative.GssFlags.GSS_C_INTEG_FLAG;
}
}
else
{
if ((flags & ContextFlagsPal.InitIntegrity) != 0)
{
gssFlags |= Interop.NetSecurityNative.GssFlags.GSS_C_INTEG_FLAG;
}
}
foreach (ContextFlagMapping mapping in s_contextFlagMapping)
{
if ((flags & mapping.ContextFlag) == mapping.ContextFlag)
{
gssFlags |= mapping.GssFlags;
}
}
return(gssFlags);
}
internal static ContextFlagsPal GetContextFlagsPalFromInterop(Interop.NetSecurityNative.GssFlags gssFlags, bool isServer)
{
ContextFlagsPal flags = ContextFlagsPal.None;
// GSS_C_INTEG_FLAG is handled separately as its value can either be AcceptIntegrity (used by server) or InitIntegrity (used by client)
if ((gssFlags & Interop.NetSecurityNative.GssFlags.GSS_C_INTEG_FLAG) != 0)
{
flags |= isServer ? ContextFlagsPal.AcceptIntegrity : ContextFlagsPal.InitIntegrity;
}
foreach (ContextFlagMapping mapping in s_contextFlagMapping)
{
if ((gssFlags & mapping.GssFlags) == mapping.GssFlags)
{
flags |= mapping.ContextFlag;
}
}
return(flags);
}
private static bool GssInitSecurityContext(
ref SafeGssContextHandle?context,
SafeGssCredHandle credential,
bool isNtlm,
ChannelBinding?channelBinding,
SafeGssNameHandle?targetName,
Interop.NetSecurityNative.GssFlags inFlags,
byte[]?buffer,
out byte[]?outputBuffer,
out uint outFlags,
out bool isNtlmUsed)
{
outputBuffer = null;
outFlags = 0;
// EstablishSecurityContext is called multiple times in a session.
// In each call, we need to pass the context handle from the previous call.
// For the first call, the context handle will be null.
bool newContext = false;
if (context == null)
{
newContext = true;
context = new SafeGssContextHandle();
}
Interop.NetSecurityNative.GssBuffer token = default(Interop.NetSecurityNative.GssBuffer);
Interop.NetSecurityNative.Status status;
try
{
Interop.NetSecurityNative.Status minorStatus;
if (channelBinding != null)
{
// If a TLS channel binding token (cbt) is available then get the pointer
// to the application specific data.
int appDataOffset = Marshal.SizeOf <SecChannelBindings>();
Debug.Assert(appDataOffset < channelBinding.Size);
IntPtr cbtAppData = channelBinding.DangerousGetHandle() + appDataOffset;
int cbtAppDataSize = channelBinding.Size - appDataOffset;
status = Interop.NetSecurityNative.InitSecContext(out minorStatus,
credential,
ref context,
isNtlm,
cbtAppData,
cbtAppDataSize,
targetName,
(uint)inFlags,
buffer,
(buffer == null) ? 0 : buffer.Length,
ref token,
out outFlags,
out isNtlmUsed);
}
else
{
status = Interop.NetSecurityNative.InitSecContext(out minorStatus,
credential,
ref context,
isNtlm,
targetName,
(uint)inFlags,
buffer,
(buffer == null) ? 0 : buffer.Length,
ref token,
out outFlags,
out isNtlmUsed);
}
if ((status != Interop.NetSecurityNative.Status.GSS_S_COMPLETE) &&
(status != Interop.NetSecurityNative.Status.GSS_S_CONTINUE_NEEDED))
{
if (newContext)
{
context.Dispose();
context = null;
}
throw new Interop.NetSecurityNative.GssApiException(status, minorStatus);
}
outputBuffer = token.ToByteArray();
}
finally
{
token.Dispose();
}
return(status == Interop.NetSecurityNative.Status.GSS_S_COMPLETE);
}
private static SecurityStatusPal EstablishSecurityContext(
SafeFreeNegoCredentials credential,
ref SafeDeleteContext?context,
ChannelBinding?channelBinding,
string?targetName,
ContextFlagsPal inFlags,
byte[]?incomingBlob,
ref byte[]?resultBuffer,
ref ContextFlagsPal outFlags)
{
bool isNtlmOnly = credential.IsNtlmOnly;
if (context == null)
{
if (NetEventSource.Log.IsEnabled())
{
string protocol = isNtlmOnly ? "NTLM" : "SPNEGO";
NetEventSource.Info(context, $"requested protocol = {protocol}, target = {targetName}");
}
context = new SafeDeleteNegoContext(credential, targetName !);
}
SafeDeleteNegoContext negoContext = (SafeDeleteNegoContext)context;
try
{
Interop.NetSecurityNative.GssFlags inputFlags =
ContextFlagsAdapterPal.GetInteropFromContextFlagsPal(inFlags, isServer: false);
uint outputFlags;
bool isNtlmUsed;
SafeGssContextHandle?contextHandle = negoContext.GssContext;
bool done = GssInitSecurityContext(
ref contextHandle,
credential.GssCredential,
isNtlmOnly,
channelBinding,
negoContext.TargetName,
inputFlags,
incomingBlob,
out resultBuffer,
out outputFlags,
out isNtlmUsed);
if (done)
{
if (NetEventSource.Log.IsEnabled())
{
string protocol = isNtlmOnly ? "NTLM" : isNtlmUsed ? "SPNEGO-NTLM" : "SPNEGO-Kerberos";
NetEventSource.Info(context, $"actual protocol = {protocol}");
}
// Populate protocol used for authentication
negoContext.SetAuthenticationPackage(isNtlmUsed);
}
Debug.Assert(resultBuffer != null, "Unexpected null buffer returned by GssApi");
outFlags = ContextFlagsAdapterPal.GetContextFlagsPalFromInterop(
(Interop.NetSecurityNative.GssFlags)outputFlags, isServer: false);
Debug.Assert(negoContext.GssContext == null || contextHandle == negoContext.GssContext);
// Save the inner context handle for further calls to NetSecurity
Debug.Assert(negoContext.GssContext == null || contextHandle == negoContext.GssContext);
if (null == negoContext.GssContext)
{
negoContext.SetGssContext(contextHandle !);
}
SecurityStatusPalErrorCode errorCode = done ?
(negoContext.IsNtlmUsed && resultBuffer.Length > 0 ? SecurityStatusPalErrorCode.OK : SecurityStatusPalErrorCode.CompleteNeeded) :
SecurityStatusPalErrorCode.ContinueNeeded;
return(new SecurityStatusPal(errorCode));
}
catch (Exception ex)
{
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Error(null, ex);
}
return(new SecurityStatusPal(SecurityStatusPalErrorCode.InternalError, ex));
}
}
private static SecurityStatusPal EstablishSecurityContext(
SafeFreeNegoCredentials credential,
ref SafeDeleteContext context,
string targetName,
ContextFlagsPal inFlags,
SecurityBuffer inputBuffer,
SecurityBuffer outputBuffer,
ref ContextFlagsPal outFlags)
{
bool isNtlmOnly = credential.IsNtlmOnly;
if (context == null)
{
// Empty target name causes the failure on Linux, hence passing a non-empty string
context = isNtlmOnly ? new SafeDeleteNegoContext(credential, credential.UserName) : new SafeDeleteNegoContext(credential, targetName);
}
SafeDeleteNegoContext negoContext = (SafeDeleteNegoContext)context;
try
{
Interop.NetSecurityNative.GssFlags inputFlags = ContextFlagsAdapterPal.GetInteropFromContextFlagsPal(inFlags, isServer: false);
uint outputFlags;
int isNtlmUsed;
SafeGssContextHandle contextHandle = negoContext.GssContext;
bool done = GssInitSecurityContext(
ref contextHandle,
credential.GssCredential,
isNtlmOnly,
negoContext.TargetName,
inputFlags,
inputBuffer?.token,
out outputBuffer.token,
out outputFlags,
out isNtlmUsed);
Debug.Assert(outputBuffer.token != null, "Unexpected null buffer returned by GssApi");
outputBuffer.size = outputBuffer.token.Length;
outputBuffer.offset = 0;
outFlags = ContextFlagsAdapterPal.GetContextFlagsPalFromInterop((Interop.NetSecurityNative.GssFlags)outputFlags, isServer: false);
Debug.Assert(negoContext.GssContext == null || contextHandle == negoContext.GssContext);
// Save the inner context handle for further calls to NetSecurity
Debug.Assert(negoContext.GssContext == null || contextHandle == negoContext.GssContext);
if (null == negoContext.GssContext)
{
negoContext.SetGssContext(contextHandle);
}
// Populate protocol used for authentication
if (done)
{
negoContext.SetAuthenticationPackage(Convert.ToBoolean(isNtlmUsed));
}
SecurityStatusPalErrorCode errorCode = done ?
(negoContext.IsNtlmUsed && outputBuffer.size > 0 ? SecurityStatusPalErrorCode.OK : SecurityStatusPalErrorCode.CompleteNeeded) :
SecurityStatusPalErrorCode.ContinueNeeded;
return(new SecurityStatusPal(errorCode));
}
catch (Exception ex)
{
if (NetEventSource.IsEnabled)
{
NetEventSource.Error(null, ex);
}
return(new SecurityStatusPal(SecurityStatusPalErrorCode.InternalError, ex));
}
}
public ContextFlagMapping(Interop.NetSecurityNative.GssFlags gssFlag, ContextFlagsPal contextFlag)
{
GssFlags = gssFlag;
ContextFlag = contextFlag;
}
private static SecurityStatusPal EstablishSecurityContext(
SafeFreeNegoCredentials credential,
ref SafeDeleteContext?context,
ChannelBinding?channelBinding,
string?targetName,
ContextFlagsPal inFlags,
ReadOnlySpan <byte> incomingBlob,
out byte[]?resultBuffer,
ref ContextFlagsPal outFlags)
{
bool isNtlmOnly = credential.IsNtlmOnly;
resultBuffer = null;
if (context == null)
{
if (NetEventSource.Log.IsEnabled())
{
string protocol = isNtlmOnly ? "NTLM" : "SPNEGO";
NetEventSource.Info(context, $"requested protocol = {protocol}, target = {targetName}");
}
context = new SafeDeleteNegoContext(credential, targetName !);
}
Interop.NetSecurityNative.GssBuffer token = default(Interop.NetSecurityNative.GssBuffer);
Interop.NetSecurityNative.Status status;
Interop.NetSecurityNative.Status minorStatus;
SafeDeleteNegoContext negoContext = (SafeDeleteNegoContext)context;
SafeGssContextHandle contextHandle = negoContext.GssContext;
try
{
Interop.NetSecurityNative.GssFlags inputFlags =
ContextFlagsAdapterPal.GetInteropFromContextFlagsPal(inFlags, isServer: false);
uint outputFlags;
bool isNtlmUsed;
if (channelBinding != null)
{
// If a TLS channel binding token (cbt) is available then get the pointer
// to the application specific data.
int appDataOffset = Marshal.SizeOf <SecChannelBindings>();
Debug.Assert(appDataOffset < channelBinding.Size);
IntPtr cbtAppData = channelBinding.DangerousGetHandle() + appDataOffset;
int cbtAppDataSize = channelBinding.Size - appDataOffset;
status = Interop.NetSecurityNative.InitSecContext(out minorStatus,
credential.GssCredential,
ref contextHandle,
isNtlmOnly,
cbtAppData,
cbtAppDataSize,
negoContext.TargetName,
(uint)inputFlags,
incomingBlob,
ref token,
out outputFlags,
out isNtlmUsed);
}
else
{
status = Interop.NetSecurityNative.InitSecContext(out minorStatus,
credential.GssCredential,
ref contextHandle,
isNtlmOnly,
negoContext.TargetName,
(uint)inputFlags,
incomingBlob,
ref token,
out outputFlags,
out isNtlmUsed);
}
if ((status != Interop.NetSecurityNative.Status.GSS_S_COMPLETE) &&
(status != Interop.NetSecurityNative.Status.GSS_S_CONTINUE_NEEDED))
{
if (negoContext.GssContext.IsInvalid)
{
context.Dispose();
}
Interop.NetSecurityNative.GssApiException gex = new Interop.NetSecurityNative.GssApiException(status, minorStatus);
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Error(null, gex);
}
resultBuffer = Array.Empty <byte>();
return(new SecurityStatusPal(GetErrorCode(gex), gex));
}
resultBuffer = token.ToByteArray();
if (status == Interop.NetSecurityNative.Status.GSS_S_COMPLETE)
{
if (NetEventSource.Log.IsEnabled())
{
string protocol = isNtlmOnly ? "NTLM" : isNtlmUsed ? "SPNEGO-NTLM" : "SPNEGO-Kerberos";
NetEventSource.Info(context, $"actual protocol = {protocol}");
}
// Populate protocol used for authentication
negoContext.SetAuthenticationPackage(isNtlmUsed);
}
Debug.Assert(resultBuffer != null, "Unexpected null buffer returned by GssApi");
outFlags = ContextFlagsAdapterPal.GetContextFlagsPalFromInterop(
(Interop.NetSecurityNative.GssFlags)outputFlags, isServer: false);
SecurityStatusPalErrorCode errorCode = status == Interop.NetSecurityNative.Status.GSS_S_COMPLETE ?
SecurityStatusPalErrorCode.OK :
SecurityStatusPalErrorCode.ContinueNeeded;
return(new SecurityStatusPal(errorCode));
}
catch (Exception ex)
{
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Error(null, ex);
}
return(new SecurityStatusPal(SecurityStatusPalErrorCode.InternalError, ex));
}
finally
{
token.Dispose();
// Save the inner context handle for further calls to NetSecurity
//
// For the first call `negoContext.GssContext` is invalid and we expect the
// inital handle to be returned from InitSecContext. For any subsequent
// call the handle should stay the same or it can be destroyed by the native
// InitSecContext call.
Debug.Assert(
negoContext.GssContext == contextHandle ||
negoContext.GssContext.IsInvalid ||
contextHandle.IsInvalid);
negoContext.SetGssContext(contextHandle);
}
}
private static SecurityStatusPal EstablishSecurityContext(
SafeFreeNegoCredentials credential,
ref SafeDeleteContext context,
bool isNtlm,
string targetName,
ContextFlagsPal inFlags,
SecurityBuffer inputBuffer,
SecurityBuffer outputBuffer,
ref ContextFlagsPal outFlags)
{
Debug.Assert(!isNtlm, "EstablishSecurityContext: NTLM is not yet supported");
if (context == null)
{
context = new SafeDeleteNegoContext(credential, targetName);
}
SafeDeleteNegoContext negoContext = (SafeDeleteNegoContext)context;
try
{
Interop.NetSecurityNative.GssFlags inputFlags = ContextFlagsAdapterPal.GetInteropFromContextFlagsPal(inFlags);
uint outputFlags;
SafeGssContextHandle contextHandle = negoContext.GssContext;
bool done = Interop.GssApi.EstablishSecurityContext(
ref contextHandle,
credential.GssCredential,
isNtlm,
negoContext.TargetName,
inputFlags,
inputBuffer?.token,
out outputBuffer.token,
out outputFlags);
Debug.Assert(outputBuffer.token != null, "Unexpected null buffer returned by GssApi");
outputBuffer.size = outputBuffer.token.Length;
outputBuffer.offset = 0;
outFlags = ContextFlagsAdapterPal.GetContextFlagsPalFromInterop((Interop.NetSecurityNative.GssFlags)outputFlags);
// Save the inner context handle for further calls to NetSecurity
Debug.Assert(negoContext.GssContext == null || contextHandle == negoContext.GssContext);
if (null == negoContext.GssContext)
{
negoContext.SetGssContext(contextHandle);
}
SecurityStatusPalErrorCode errorCode = done ? SecurityStatusPalErrorCode.CompleteNeeded : SecurityStatusPalErrorCode.ContinueNeeded;
return(new SecurityStatusPal(errorCode));
}
catch (Exception ex)
{
//TODO (Issue #5890): Print exception until issue is fixed
Debug.Write("Exception Caught. - " + ex);
if (GlobalLog.IsEnabled)
{
GlobalLog.Print("Exception Caught. - " + ex);
}
return(new SecurityStatusPal(SecurityStatusPalErrorCode.InternalError, ex));
}
}
internal static ContextFlagsPal GetContextFlagsPalFromInterop(Interop.NetSecurityNative.GssFlags gssFlags, bool isServer)
{
throw new PlatformNotSupportedException();
}
public ContextFlagMapping(Interop.NetSecurityNative.GssFlags gssFlag, ContextFlagsPal contextFlag)
{
GssFlags = gssFlag;
ContextFlag = contextFlag;
}