// This internal API is not thread-safe. It is acceptable since ..
// 1) From public OM, Initialize happens at ctor time.
// 2) From internal OM (Sfx), Initialize happens right after ctor (single thread env).
// i.e. ReadToken and then AuthenticateToken.
internal void Initialize(SafeFreeCredentials credentialsHandle, ChannelBinding channelBinding, ExtendedProtectionPolicy extendedProtectionPolicy)
{
if (this.isAuthenticated)
{
return;
}
bool ownCredentialsHandle = false;
SafeDeleteContext securityContext = null;
SafeCloseHandle tokenHandle = null;
#if RECOMPUTEGSS
int tokenSize = DEREncoding.TokenSize(this.request.Length);
byte[] rawRequest = new byte[tokenSize];
int offset = 0;
int len = this.request.Length;
DEREncoding.MakeTokenHeader(this.request.Length, rawRequest, ref offset, ref len);
System.Buffer.BlockCopy(this.request, 0, rawRequest, offset, this.request.Length);
#else
byte[] rawRequest = this.request;
#endif
try
{
if (credentialsHandle == null)
{
credentialsHandle = SspiWrapper.AcquireDefaultCredential("Kerberos", CredentialUse.Inbound);
ownCredentialsHandle = true;
}
SspiContextFlags fContextReq = SspiContextFlags.AllocateMemory | SspiContextFlags.Confidentiality
| SspiContextFlags.Confidentiality
| SspiContextFlags.ReplayDetect
| SspiContextFlags.SequenceDetect;
ExtendedProtectionPolicyHelper policyHelper = new ExtendedProtectionPolicyHelper(channelBinding, extendedProtectionPolicy);
if (policyHelper.PolicyEnforcement == PolicyEnforcement.Always && policyHelper.ChannelBinding == null && policyHelper.ProtectionScenario != ProtectionScenario.TrustedProxy)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityTokenException(SR.GetString(SR.SecurityChannelBindingMissing)));
}
if (policyHelper.PolicyEnforcement == PolicyEnforcement.WhenSupported)
{
fContextReq |= SspiContextFlags.ChannelBindingAllowMissingBindings;
}
if (policyHelper.ProtectionScenario == ProtectionScenario.TrustedProxy)
{
fContextReq |= SspiContextFlags.ChannelBindingProxyBindings;
}
SspiContextFlags contextFlags = SspiContextFlags.Zero;
SecurityBuffer outSecurityBuffer = new SecurityBuffer(0, BufferType.Token);
List <SecurityBuffer> list = new List <SecurityBuffer>(2);
list.Add(new SecurityBuffer(rawRequest, BufferType.Token));
if (policyHelper.ShouldAddChannelBindingToASC())
{
list.Add(new SecurityBuffer(policyHelper.ChannelBinding));
}
SecurityBuffer[] inSecurityBuffer = null;
if (list.Count > 0)
{
inSecurityBuffer = list.ToArray();
}
int statusCode = SspiWrapper.AcceptSecurityContext(credentialsHandle,
ref securityContext,
fContextReq,
Endianness.Native,
inSecurityBuffer,
outSecurityBuffer,
ref contextFlags);
if (DiagnosticUtility.ShouldTraceInformation)
{
SecurityTraceRecordHelper.TraceChannelBindingInformation(policyHelper, true, channelBinding);
}
if (statusCode != (int)SecurityStatus.OK)
{
if (statusCode == (int)SecurityStatus.ContinueNeeded)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new SecurityTokenException(SR.GetString(SR.KerberosMultilegsNotSupported), new Win32Exception(statusCode)));
}
else if (statusCode == (int)SecurityStatus.OutOfMemory)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new SecurityTokenException(SR.GetString(SR.KerberosApReqInvalidOrOutOfMemory), new Win32Exception(statusCode)));
}
else
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new SecurityTokenException(SR.GetString(SR.FailAcceptSecurityContext), new Win32Exception(statusCode)));
}
}
// Expiration
LifeSpan lifeSpan = (LifeSpan)SspiWrapper.QueryContextAttributes(securityContext, ContextAttribute.Lifespan);
DateTime effectiveTime = lifeSpan.EffectiveTimeUtc;
DateTime expirationTime = lifeSpan.ExpiryTimeUtc;
// SessionKey
SecuritySessionKeyClass sessionKey = (SecuritySessionKeyClass)SspiWrapper.QueryContextAttributes(securityContext, ContextAttribute.SessionKey);
this.symmetricSecurityKey = new InMemorySymmetricSecurityKey(sessionKey.SessionKey);
// WindowsSecurityToken
statusCode = SspiWrapper.QuerySecurityContextToken(securityContext, out tokenHandle);
if (statusCode != (int)SecurityStatus.OK)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(statusCode));
}
WindowsIdentity windowsIdentity = new WindowsIdentity(tokenHandle.DangerousGetHandle(), SecurityUtils.AuthTypeKerberos);
Initialize(this.id, SecurityUtils.AuthTypeKerberos, effectiveTime, expirationTime, windowsIdentity, false);
// Authenticated
this.isAuthenticated = true;
}
finally
{
if (tokenHandle != null)
{
tokenHandle.Close();
}
if (securityContext != null)
{
securityContext.Close();
}
if (ownCredentialsHandle && credentialsHandle != null)
{
credentialsHandle.Close();
}
}
}
void Initialize(TokenImpersonationLevel tokenImpersonationLevel, NetworkCredential networkCredential, SafeFreeCredentials credentialsHandle, ChannelBinding channelBinding)
{
bool ownCredentialsHandle = false;
SafeDeleteContext securityContext = null;
try
{
if (credentialsHandle == null)
{
if (networkCredential == null || networkCredential == CredentialCache.DefaultNetworkCredentials)
{
credentialsHandle = SspiWrapper.AcquireDefaultCredential("Kerberos", CredentialUse.Outbound);
}
else
{
AuthIdentityEx authIdentity = new AuthIdentityEx(networkCredential.UserName, networkCredential.Password, networkCredential.Domain);
credentialsHandle = SspiWrapper.AcquireCredentialsHandle("Kerberos", CredentialUse.Outbound, ref authIdentity);
}
ownCredentialsHandle = true;
}
SspiContextFlags fContextReq = SspiContextFlags.AllocateMemory
| SspiContextFlags.Confidentiality
| SspiContextFlags.ReplayDetect
| SspiContextFlags.SequenceDetect;
// we only accept Identity or Impersonation (Impersonation is default).
if (tokenImpersonationLevel == TokenImpersonationLevel.Identification)
{
fContextReq |= SspiContextFlags.InitIdentify;
}
SspiContextFlags contextFlags = SspiContextFlags.Zero;
SecurityBuffer inSecurityBuffer = null;
if (channelBinding != null)
{
inSecurityBuffer = new SecurityBuffer(channelBinding);
}
SecurityBuffer outSecurityBuffer = new SecurityBuffer(0, BufferType.Token);
int statusCode = SspiWrapper.InitializeSecurityContext(
credentialsHandle,
ref securityContext,
this.servicePrincipalName,
fContextReq,
Endianness.Native,
inSecurityBuffer,
outSecurityBuffer,
ref contextFlags);
if (DiagnosticUtility.ShouldTraceInformation)
{
SecurityTraceRecordHelper.TraceChannelBindingInformation(null, false, channelBinding);
}
if (statusCode != (int)SecurityStatus.OK)
{
if (statusCode == (int)SecurityStatus.ContinueNeeded)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new SecurityTokenException(SR.GetString(SR.KerberosMultilegsNotSupported), new Win32Exception(statusCode)));
}
else
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new SecurityTokenException(SR.GetString(SR.FailInitializeSecurityContext), new Win32Exception(statusCode)));
}
}
#if REMOVEGSS
//
// ... and strip GSS-framing from it
//
int offset = 0;
int len = outSecurityBuffer.token.Length;
DEREncoding.VerifyTokenHeader(outSecurityBuffer.token, ref offset, ref len);
this.apreq = SecurityUtils.CloneBuffer(outSecurityBuffer.token, offset, len);
#else
this.apreq = outSecurityBuffer.token;
#endif
// Expiration
LifeSpan lifeSpan = (LifeSpan)SspiWrapper.QueryContextAttributes(securityContext, ContextAttribute.Lifespan);
this.effectiveTime = lifeSpan.EffectiveTimeUtc;
this.expirationTime = lifeSpan.ExpiryTimeUtc;
// SessionKey
SecuritySessionKeyClass sessionKey = (SecuritySessionKeyClass)SspiWrapper.QueryContextAttributes(securityContext, ContextAttribute.SessionKey);
this.symmetricSecurityKey = new InMemorySymmetricSecurityKey(sessionKey.SessionKey);
}
finally
{
if (securityContext != null)
{
securityContext.Close();
}
if (ownCredentialsHandle && credentialsHandle != null)
{
credentialsHandle.Close();
}
}
}
internal void Initialize(SafeFreeCredentials credentialsHandle, ChannelBinding channelBinding, ExtendedProtectionPolicy extendedProtectionPolicy)
{
if (!this.isAuthenticated)
{
bool flag = false;
SafeDeleteContext refContext = null;
SafeCloseHandle token = null;
byte[] request = this.request;
try
{
if (credentialsHandle == null)
{
credentialsHandle = SspiWrapper.AcquireDefaultCredential("Kerberos", CredentialUse.Inbound, new string[0]);
flag = true;
}
SspiContextFlags inFlags = SspiContextFlags.AllocateMemory | SspiContextFlags.Confidentiality | SspiContextFlags.SequenceDetect | SspiContextFlags.ReplayDetect;
ExtendedProtectionPolicyHelper helper = new ExtendedProtectionPolicyHelper(channelBinding, extendedProtectionPolicy);
if (((helper.PolicyEnforcement == PolicyEnforcement.Always) && (helper.ChannelBinding == null)) && (helper.ProtectionScenario != ProtectionScenario.TrustedProxy))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityTokenException(System.IdentityModel.SR.GetString("SecurityChannelBindingMissing")));
}
if (helper.PolicyEnforcement == PolicyEnforcement.WhenSupported)
{
inFlags |= SspiContextFlags.ChannelBindingAllowMissingBindings;
}
if (helper.ProtectionScenario == ProtectionScenario.TrustedProxy)
{
inFlags |= SspiContextFlags.ChannelBindingProxyBindings;
}
SspiContextFlags zero = SspiContextFlags.Zero;
SecurityBuffer outputBuffer = new SecurityBuffer(0, BufferType.Token);
List <SecurityBuffer> list = new List <SecurityBuffer>(2)
{
new SecurityBuffer(request, 2)
};
if (helper.ShouldAddChannelBindingToASC())
{
list.Add(new SecurityBuffer(helper.ChannelBinding));
}
SecurityBuffer[] inputBuffers = null;
if (list.Count > 0)
{
inputBuffers = list.ToArray();
}
int error = SspiWrapper.AcceptSecurityContext(credentialsHandle, ref refContext, inFlags, Endianness.Native, inputBuffers, outputBuffer, ref zero);
switch (error)
{
case 0:
break;
case 0x90312:
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityTokenException(System.IdentityModel.SR.GetString("KerberosMultilegsNotSupported"), new Win32Exception(error)));
case -2146893056:
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityTokenException(System.IdentityModel.SR.GetString("KerberosApReqInvalidOrOutOfMemory"), new Win32Exception(error)));
default:
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityTokenException(System.IdentityModel.SR.GetString("FailAcceptSecurityContext"), new Win32Exception(error)));
}
LifeSpan span = (LifeSpan)SspiWrapper.QueryContextAttributes(refContext, ContextAttribute.Lifespan);
DateTime effectiveTimeUtc = span.EffectiveTimeUtc;
DateTime expiryTimeUtc = span.ExpiryTimeUtc;
SecuritySessionKeyClass class2 = (SecuritySessionKeyClass)SspiWrapper.QueryContextAttributes(refContext, ContextAttribute.SessionKey);
this.symmetricSecurityKey = new InMemorySymmetricSecurityKey(class2.SessionKey);
error = SspiWrapper.QuerySecurityContextToken(refContext, out token);
if (error != 0)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(error));
}
System.Security.Principal.WindowsIdentity windowsIdentity = new System.Security.Principal.WindowsIdentity(token.DangerousGetHandle(), "Kerberos");
base.Initialize(this.id, "Kerberos", effectiveTimeUtc, expiryTimeUtc, windowsIdentity, false);
this.isAuthenticated = true;
}
finally
{
if (token != null)
{
token.Close();
}
if (refContext != null)
{
refContext.Close();
}
if (flag && (credentialsHandle != null))
{
credentialsHandle.Close();
}
}
}
}
