internal static extern SecurityStatus AcceptSecurityContext_2(
     ref RawSspiHandle credHandle,
     ref RawSspiHandle oldContextHandle,
     IntPtr inputBuffer,
     ContextAttrib requestedAttribs,
     SecureBufferDataRep dataRep,
     ref RawSspiHandle newContextHandle,
     IntPtr outputBuffer,
     ref ContextAttrib outputAttribs,
     ref TimeStamp expiry
     );
 internal static extern SecurityStatus AcceptSecurityContext_1(
     ref RawSspiHandle credHandle,
     IntPtr oldContextHandle,
     IntPtr inputBuffer,
     ContextAttrib requestedAttribs,
     SecureBufferDataRep dataRep,
     ref RawSspiHandle newContextHandle,
     IntPtr outputBuffer,
     ref ContextAttrib outputAttribs,
     ref TimeStamp expiry
 );
 internal static extern SecurityStatus AcceptSecurityContext_2
 (
     ref RawSspiHandle phCredential,
     ref RawSspiHandle phContext,
     IntPtr pInput,
     SecurityContextAttributes fContextReq,
     SecureBufferDataRep targetDataRep,
     ref RawSspiHandle phNewContext,
     IntPtr pOutput,
     ref SecurityContextAttributes pfContextAttr,
     ref Timestamp ptsTimeStamp
 );
 internal static extern SecurityStatus InitializeSecurityContext_1(
     ref RawSspiHandle credentialHandle,
     IntPtr zero,
     string serverPrincipleName,
     ContextAttrib requiredAttribs,
     int reserved1,
     SecureBufferDataRep dataRep,
     IntPtr inputBuffer,
     int reserved2,
     ref RawSspiHandle newContextHandle,
     IntPtr outputBuffer,
     ref ContextAttrib contextAttribs,
     ref TimeStamp expiry
     );
 internal static extern SecurityStatus InitializeSecurityContext_2
 (
     ref RawSspiHandle phCredential,
     ref RawSspiHandle phContext,
     string pszTargetName,
     SecurityContextAttributes fContextReq,
     int reserved1,
     SecureBufferDataRep targetDataRep,
     IntPtr pInput,
     int reserved2,
     ref RawSspiHandle phNewContext,
     IntPtr pOutput,
     ref SecurityContextAttributes pfContextAttr,
     ref Timestamp ptsExpiry
 );
 internal static extern SecurityStatus InitializeSecurityContext_1(
     ref RawSspiHandle credentialHandle,
     IntPtr zero,
     string serverPrincipleName,
     ContextAttrib requiredAttribs,
     int reserved1,
     SecureBufferDataRep dataRep,
     IntPtr inputBuffer,
     int reserved2,
     ref RawSspiHandle newContextHandle,
     IntPtr outputBuffer,
     ref ContextAttrib contextAttribs,
     ref TimeStamp expiry
 );