NAME
   PassThrough,
   CSSM_CSP_PassThrough,
   CSP_PassThrough     - Extend crypto functionality (CDSA)

 SYNOPSIS
   # include <cssm.h>

    API:
        CSSM_RETURN CSSMAPI CSSM_CSP_PassThrough
        (CSSM_CC_HANDLE CCHandle,
        uint32 PassThroughId,
        const void *InData,
        void **OutData)
    SPI:
        CSSM_RETURN CSSMCSPI CSP_PassThrough
        (CSSM_CSP_HANDLE CSPHandle,
        CSSM_CC_HANDLE CCHandle,
        const CSSM_CONTEXT *Context,
        uint32 PassThroughId,
        const void *InData,
        void **OutData)

 LIBRARY
   Common Security Services Manager library (CDSA$INCSSM300_SHR.EXE)

 API PARAMETERS
   CCHandle (input)
           The handle that describes the context of this cryptographic
           operation.

   PassThroughId (input)
           An identifier specifying the custom function to be performed.

   InData (input)
           A pointer to a module, implementation-specific structure
           containing the input data.

   OutData (output)
           A pointer to a module, implementation-specific structure
           containing the output data. The service provider will
           allocate the memory for this structure.  The application
           should free the memory for the structure.

 SPI PARAMETERS
   CSPHandle (input)
           Handle of the CSP supporting the PassThrough function.

   Context (input)
           Pointer to CSSM_CONTEXT structure that describes the
           attributes with this custom context structure.

 DESCRIPTION
   The CSSM_CSP_PassThrough() (CSSM API), or CSP_PassThrough() (CSP SPI),
   function is provided to allow CSP developers to extend the crypto
   functionality of the CSSM API.

 NOTES
   The CSP_EventNotify() function is used by the CSSM Core to interact
   with the CSP module.

   Because this function is only exposed to CSSM as a function pointer,
   the function name internal to the CSP can be assigned at the
   discretion of the CSP module developer. However, the parameter list
   and return value types must match those defined for this function.

   The error codes given in this section constitute the generic error
   codes, which may be used by all CSP libraries to describe common
   error conditions.  CSP module developers may also define their own
   module-specific error codes.

 RETURN VALUE
   A CSSM_RETURN value indicating success or specifying a particular
   error condition. The value CSSM_OK indicates success. All other
   values represent an error condition.

 ERRORS
   Errors are described in the CDSA technical standard.  See CDSA.

        CSSMERR_CSP_INVALID_PASSTHROUGH_ID

 SEE ALSO
   Books

   Intel CDSA Application Developer's Guide (see CDSA)

   Other Help Topics