/// <summary>
/// Acquire an existing Windows security context.
/// </summary>
/// <param name="username">Target username for this security context.</param>
/// <param name="credentials">Credentials handle.</param>
/// <param name="securityPackage">Security package.</param>
/// <param name="fContextReq">Bit flags that indicate requests for the context.</param>
/// <param name="targetDataRep">Target data representation.</param>
public WindowsSecurityContext(string username, WindowsCredentialsHandle credentials, string securityPackage,
int fContextReq, int targetDataRep)
{
_username = username;
_credentials = credentials.Handle;
_securityPackage = securityPackage;
_token = new Secur32.SecBufferDesc(Secur32.MAX_TOKEN_SIZE);
int rc = Secur32.InitializeSecurityContext(
ref credentials.Handle,
IntPtr.Zero,
username, // service principal name
fContextReq,
0,
targetDataRep,
IntPtr.Zero,
0,
ref _context,
ref _token,
out _contextAttributes,
out _contextLifetime);
switch (rc)
{
case Secur32.SEC_E_OK:
break;
case Secur32.SEC_I_CONTINUE_NEEDED:
_continue = true;
break;
default:
throw new Win32Exception(rc);
}
}
/// <summary>
/// Acquire an existing Windows security context.
/// </summary>
/// <param name="username">Target username for this security context.</param>
/// <param name="credentials">Credentials handle.</param>
/// <param name="securityPackage">Security package.</param>
/// <param name="fContextReq">Bit flags that indicate requests for the context.</param>
/// <param name="targetDataRep">Target data representation.</param>
public WindowsSecurityContext(string username, WindowsCredentialsHandle credentials, string securityPackage,
int fContextReq, int targetDataRep)
{
_username = username;
_credentials = credentials.Handle;
_securityPackage = securityPackage;
_token = new Secur32.SecBufferDesc(Secur32.MAX_TOKEN_SIZE);
int rc = Secur32.InitializeSecurityContext(
ref credentials.Handle,
IntPtr.Zero,
username, // service principal name
fContextReq,
0,
targetDataRep,
IntPtr.Zero,
0,
ref _context,
ref _token,
out _contextAttributes,
out _contextLifetime);
switch (rc)
{
case Secur32.SEC_E_OK:
break;
case Secur32.SEC_I_CONTINUE_NEEDED:
_continue = true;
break;
default:
throw new Win32Exception(rc);
}
}
/// <summary>
/// Acquire an existing Windows security context.
/// </summary>
/// <param name="targetName">Target name for this security context.</param>
/// <param name="credentials">Credentials handle.</param>
/// <param name="securityPackage">Security package.</param>
/// <param name="fContextReq">Bit flags that indicate requests for the context.</param>
/// <param name="targetDataRep">Target data representation.</param>
public WindowsSecurityContext(string targetName, WindowsCredentialsHandle credentials, string securityPackage, int fContextReq, int targetDataRep)
{
_targetName = targetName;
_credentials = credentials.Handle;
_securityPackage = securityPackage;
Initialize(credentials.Handle, _targetName, fContextReq, targetDataRep);
}
/// <summary>
/// Acquire an existing Windows security context.
/// </summary>
/// <param name="targetName">Target name for this security context.</param>
/// <param name="credentials">Credentials handle.</param>
/// <param name="securityPackage">Security package.</param>
/// <param name="fContextReq">Bit flags that indicate requests for the context.</param>
/// <param name="targetDataRep">Target data representation.</param>
public WindowsSecurityContext(string targetName, WindowsCredentialsHandle credentials, string securityPackage, int fContextReq, int targetDataRep)
{
_targetName = targetName;
_credentials = credentials.Handle;
_securityPackage = securityPackage;
Initialize(credentials.Handle, _targetName, fContextReq, targetDataRep);
}
/// <summary>
/// A continuation Windows Security Context.
/// </summary>
/// <param name="init">
/// Initial context that contains a handle to the credentials returned by
/// AcquireCredentialsHandle. This handle is used to build the security context.
/// </param>
/// <param name="continueToken">
/// Token returned by the remote computer.
/// </param>
/// <param name="fContextReq">
/// Bit flags that indicate requests for the context. Not all packages can support all requirements.
/// Flags used for this parameter are prefixed with ISC_REQ_, for example, ISC_REQ_DELEGATE.
/// </param>
/// <param name="targetDataRep">
/// </param>
public WindowsSecurityContext(WindowsSecurityContext init, byte[] continueToken, int fContextReq, int targetDataRep)
{
_targetName = init._targetName;
_credentials = init._credentials;
_securityPackage = init._securityPackage;
using (var continueTokenBuffer = new Secur32.SecBufferDesc(continueToken))
{
Initialize(_credentials, _targetName, fContextReq, targetDataRep, init._context, continueTokenBuffer);
}
}
/// <summary>
/// Acquire an existing Windows security context.
/// </summary>
/// <param name="context"></param>
/// <param name="contextAttributes"></param>
/// <param name="contextLifetime"></param>
/// <param name="continueNeeded"></param>
/// <param name="securityPackage"></param>
/// <param name="token"></param>
public WindowsSecurityContext(
Secur32.SecHandle context,
uint contextAttributes,
Secur32.SECURITY_INTEGER contextLifetime,
Secur32.SecBufferDesc token,
string securityPackage,
bool continueNeeded)
{
_context = context;
_contextAttributes = contextAttributes;
_contextLifetime = contextLifetime;
_securityPackage = securityPackage;
_token = token;
_continue = continueNeeded;
}
/// <summary>
/// Acquire an existing Windows security context.
/// </summary>
/// <param name="context"></param>
/// <param name="contextAttributes"></param>
/// <param name="contextLifetime"></param>
/// <param name="continueNeeded"></param>
/// <param name="securityPackage"></param>
/// <param name="token"></param>
public WindowsSecurityContext(
Secur32.SecHandle context,
uint contextAttributes,
Secur32.SECURITY_INTEGER contextLifetime,
Secur32.SecBufferDesc token,
string securityPackage,
bool continueNeeded)
{
_context = context;
_contextAttributes = contextAttributes;
_contextLifetime = contextLifetime;
_securityPackage = securityPackage;
_token = token;
_continue = continueNeeded;
}
/// <summary>
/// Validate a security token and return the windows account of the user that generated the token.
/// Implementation of <see cref="T:Waffle.Windows.AuthProvider.IWindowsAuthProvider.ValidateNegotiateToken" />.
/// </summary>
/// <remarks>
/// This function supports AcceptSecurityToken continuation on the same thread.
/// </remarks>
/// <param name="connectionId">Connection id.</param>
/// <param name="token">Security token.</param>
/// <param name="securityPackage">Security package, eg. "Negotiate".</param>
/// <param name="fContextReq"></param>
/// <param name="targetDataRep"></param>
/// <returns></returns>
public IWindowsSecurityContext AcceptSecurityToken(string connectionId, byte[] token, string securityPackage,
int fContextReq, int targetDataRep)
{
Secur32.SecHandle newContext = Secur32.SecHandle.Zero;
Secur32.SecBufferDesc serverToken = Secur32.SecBufferDesc.Zero;
Secur32.SecBufferDesc clientToken = Secur32.SecBufferDesc.Zero;
Secur32.SECURITY_INTEGER serverLifetime = Secur32.SECURITY_INTEGER.Zero;
WindowsCredentialsHandle credentialsHandle = new WindowsCredentialsHandle(
string.Empty, Secur32.SECPKG_CRED_INBOUND, securityPackage);
var tokenSize = Secur32.MAX_TOKEN_SIZE;
var rc = 0;
do
{
serverToken = new Secur32.SecBufferDesc(tokenSize);
clientToken = new Secur32.SecBufferDesc(token);
uint serverContextAttributes = 0;
Secur32.SecHandle continueSecHandle = Secur32.SecHandle.Zero;
lock (_continueSecHandles)
{
_continueSecHandles.TryGetValue(connectionId, out continueSecHandle);
}
if (continueSecHandle == Secur32.SecHandle.Zero)
{
rc = Secur32.AcceptSecurityContext(
ref credentialsHandle.Handle,
IntPtr.Zero,
ref clientToken,
fContextReq,
targetDataRep,
ref newContext,
ref serverToken,
out serverContextAttributes,
out serverLifetime);
}
else
{
rc = Secur32.AcceptSecurityContext(
ref credentialsHandle.Handle,
ref continueSecHandle,
ref clientToken,
fContextReq,
targetDataRep,
ref newContext,
ref serverToken,
out serverContextAttributes,
out serverLifetime);
}
switch (rc)
{
case Secur32.SEC_E_INSUFFICIENT_MEMORY:
tokenSize += Secur32.MAX_TOKEN_SIZE;
break;
case Secur32.SEC_E_OK:
lock (_continueSecHandles)
{
_continueSecHandles.Remove(connectionId);
}
return(new WindowsSecurityContext(
newContext,
serverContextAttributes,
serverLifetime,
serverToken,
securityPackage,
false));
case Secur32.SEC_I_CONTINUE_NEEDED:
lock (_continueSecHandles)
{
_continueSecHandles[connectionId] = newContext;
}
return(new WindowsSecurityContext(
newContext,
serverContextAttributes,
serverLifetime,
serverToken,
securityPackage,
true));
default:
lock (_continueSecHandles)
{
_continueSecHandles.Remove(connectionId);
}
throw new Win32Exception(rc);
}
} while (rc == Secur32.SEC_E_INSUFFICIENT_MEMORY);
return(null);
}
/// <summary>
/// A continuation Windows Security Context.
/// </summary>
/// <param name="init">
/// Initial context that contains a handle to the credentials returned by
/// AcquireCredentialsHandle. This handle is used to build the security context.
/// </param>
/// <param name="continueToken">
/// Token returned by the remote computer.
/// </param>
/// <param name="fContextReq">
/// Bit flags that indicate requests for the context. Not all packages can support all requirements.
/// Flags used for this parameter are prefixed with ISC_REQ_, for example, ISC_REQ_DELEGATE.
/// </param>
/// <param name="targetDataRep">
/// </param>
public WindowsSecurityContext(WindowsSecurityContext init, byte[] continueToken, int fContextReq, int targetDataRep)
{
_targetName = init._targetName;
_credentials = init._credentials;
_securityPackage = init._securityPackage;
using (var continueTokenBuffer = new Secur32.SecBufferDesc(continueToken))
{
Initialize(_credentials, _targetName, fContextReq, targetDataRep, init._context, continueTokenBuffer);
}
}
private void Initialize(Secur32.SecHandle credentials, string targetName, int fContextReq, int targetDataRep, Secur32.SecHandle context, Secur32.SecBufferDesc continueTokenBuffer)
{
var tokenSize = Secur32.MAX_TOKEN_SIZE;
var rc = 0;
var hasContextAndContinue = context != Secur32.SecHandle.Zero && continueTokenBuffer != Secur32.SecBufferDesc.Zero;
do
{
_token.Dispose();
_token = new Secur32.SecBufferDesc(tokenSize);
if (hasContextAndContinue)
{
rc = Secur32.InitializeSecurityContext(
ref credentials,
ref context,
targetName,
fContextReq,
0,
targetDataRep,
ref continueTokenBuffer,
0,
ref _context,
ref _token,
out _contextAttributes,
out _contextLifetime);
}
else
{
rc = Secur32.InitializeSecurityContext(
ref credentials,
IntPtr.Zero,
targetName,
fContextReq,
0,
targetDataRep,
IntPtr.Zero,
0,
ref _context,
ref _token,
out _contextAttributes,
out _contextLifetime);
}
switch (rc)
{
case Secur32.SEC_E_INSUFFICIENT_MEMORY:
tokenSize += Secur32.MAX_TOKEN_SIZE;
break;
case Secur32.SEC_E_OK:
break;
case Secur32.SEC_I_CONTINUE_NEEDED:
_continue = true;
break;
default:
throw new Win32Exception(rc);
}
} while (rc == Secur32.SEC_E_INSUFFICIENT_MEMORY);
}
private void Initialize(Secur32.SecHandle credentials, string targetName, int fContextReq, int targetDataRep)
{
this.Initialize(credentials, targetName, fContextReq, targetDataRep, Secur32.SecHandle.Zero, Secur32.SecBufferDesc.Zero);
}