NAME    [Toc]    [Back]

       DecryptDataFinal,  CSSM_DecryptDataFinal, CSP_DecryptDataFinal
 - Finalize staged decryption process (CDSA)

SYNOPSIS    [Toc]    [Back]

       # include <cdsa/cssm.h>

       API:     CSSM_RETURN     CSSMAPI     CSSM_DecryptDataFinal
       (CSSM_CC_HANDLE   CCHandle,  CSSM_DATA_PTR  RemData)  SPI:
       CSSM_RETURN CSSMCSPI CSP_DecryptDataFinal (CSSM_CSP_HANDLE
       CSPHandle, CSSM_CC_HANDLE CCHandle, CSSM_DATA_PTR RemData)

LIBRARY    [Toc]    [Back]

       Common Security Services Manager library (libcssm.so)

API PARAMETERS    [Toc]    [Back]

       The handle that describes  the  context  of  this  cryptographic
 operation used to link to the CSP-managed information.
  A pointer to the CSSM_DATA structure for  the  last
       decrypted block, if necessary.

SPI PARAMETERS    [Toc]    [Back]

       The handle that describes the add-in cryptographic service
       provider module used to perform calls to CSSM for the memory
 functions managed by CSSM.

DESCRIPTION    [Toc]    [Back]

       This  function  finalizes the staged decryption process by
       returning any remaining plain text  not  returned  in  the
       previous  staged  decryption  call.   The  plain  text  is
       returned in a single buffer.

NOTES FOR API    [Toc]    [Back]

       The output is returned to the caller either by filling the
       caller-specified  buffer  or  by  using  the application's
       declared memory allocation functions  to  allocate  buffer
       space. To specify a specific, pre-allocated output buffer,
       the caller must provide an array of one or more  CSSM_DATA
       structures,  each  containing a Length field value greater
       than zero and a non-NULL  data  pointer  field  value.  To
       specify automatic output buffer allocation by the CSP, the
       caller must provide an array  of  one  or  more  CSSM_DATA
       structures,  each containing a Length field value equal to
       zero and a NULL data pointer field value. The  application
       is  always responsible for deallocating the memory when it
       is no longer needed.

NOTES FOR SPI    [Toc]    [Back]

       The output is returned  to  the  caller  as  specified  in
       Buffer Management for Cryptographic Services.

RETURN VALUE    [Toc]    [Back]

       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    [Toc]    [Back]

       Errors  are described in the CDSA technical standard.  See
       CDSA_intro(3).     CSSMERR_CSP_BLOCK_SIZE_MISMATCH    CSSMERR_CSP_OUTPUT_LENGTH_ERROR

SEE ALSO    [Toc]    [Back]

       Books

       Intel    CDSA    Application    Developer's   Guide   (see
       CDSA_intro(3))

       Reference Pages    [Toc]    [Back]

       Functions for the CSSM API:

       CSSM_DecryptData(3),              CSSM_DecryptDataInit(3),
       CSSM_DecryptDataUpdate(3)

       Functions for the CSP SPI:

       CSP_DecryptData(3),  CSP_DecryptDataInit(3),  CSP_DecryptDataUpdate(3)



                                              DecryptDataFinal(3)