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DecryptDataFinal(3)					   DecryptDataFinal(3)

NAME
       DecryptDataFinal,  CSSM_DecryptDataFinal, CSP_DecryptDataFinal - Final‐
       ize staged decryption process (CDSA)

SYNOPSIS
       # include <cdsa/cssm.h>

       API: CSSM_RETURN CSSMAPI CSSM_DecryptDataFinal  (CSSM_CC_HANDLE	CCHan‐
       dle,  CSSM_DATA_PTR RemData) SPI: CSSM_RETURN CSSMCSPI CSP_DecryptData‐
       Final	(CSSM_CSP_HANDLE    CSPHandle,	  CSSM_CC_HANDLE     CCHandle,
       CSSM_DATA_PTR RemData)

LIBRARY
       Common Security Services Manager library (libcssm.so)

API PARAMETERS
       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
       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
       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
       The output is returned to the caller either by filling the caller-spec‐
       ified buffer or by using the application's declared  memory  allocation
       functions  to  allocate	buffer space. To specify a specific, pre-allo‐
       cated 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 out‐
       put  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
       The  output is returned to the caller as specified in Buffer Management
       for Cryptographic Services.

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

ERRORS
       Errors  are  described	in   the   CDSA	  technical   standard.	   See
       CDSA_intro(3).	   CSSMERR_CSP_BLOCK_SIZE_MISMATCH    CSSMERR_CSP_OUT‐
       PUT_LENGTH_ERROR

SEE ALSO
       Books

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

       Reference Pages

       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)
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