CSP_EncryptDataUpdate man page on OSF1

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EncryptDataUpdate(3)					  EncryptDataUpdate(3)

NAME
       EncryptDataUpdate, CSSM_EncryptDataUpdate, CSP_EncryptDataUpdate - Con‐
       tinue the staged encryption process (CDSA)

SYNOPSIS
       # include <cdsa/cssm.h>

       API: CSSM_RETURN CSSMAPI CSSM_EncryptDataUpdate (CSSM_CC_HANDLE	CCHan‐
       dle,  const  CSSM_DATA  *ClearBufs, uint32 ClearBufCount, CSSM_DATA_PTR
       CipherBufs,  uint32  CipherBufCount,   uint32   *bytesEncrypted)	  SPI:
       CSSM_RETURN  CSSMCSPI CSP_EncryptDataUpdate (CSSM_CSP_HANDLE CSPHandle,
       CSSM_CC_HANDLE CCHandle, const CSSM_DATA *ClearBufs,  uint32  ClearBuf‐
       Count,  CSSM_DATA_PTR CipherBufs, uint32 CipherBufCount, uint32 *bytes‐
       Encrypted)

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 a vector of
       CSSM_DATA structures that contain the data to be operated on.  The num‐
       ber  of	ClearBufs.  A pointer to a vector of CSSM_DATA structures that
       contain the encrypted data resulting  from  the	encryption  operation.
       The  number  of	CipherBufs.   A	 pointer to uint32 for the size of the
       encrypted data in bytes.

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 continues the staged encryption process over all data  in
       the  set	 of  input buffers. There can be algorithm-specific and token-
       specific rules restricting the lengths of data in  CSSM_EncryptUpdate()
       calls,  but multiple input buffers are supported. The minimum number of
       buffers required to contain the resulting cipher text  is  produced  as
       output.	Excess	output	buffer	space  is not remembered across staged
       encryption calls. Each staged call begins filling one or more new  out‐
       put  buffers. The CSSM_QuerySize() function can be used to estimate the
       output buffer size required for each update call.

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).

       None specific to this call.

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, preallocated
       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. In-place encryption can be done by supplying the same input and
       output buffers.

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

SEE ALSO
       Books

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

       Reference Pages

       Functions for the CSSM API:

       CSSM_QuerySize(3),     CSSM_DecryptData(3),    CSSM_EncryptDataInit(3),
       CSSM_EncryptDataUpdate(3),   CSSM_EncryptDataFinal(3),	 CSSM_Encrypt‐
       DataP(3),   CSSM_EncryptDataInitP(3),  CSSM_DecryptP(3),	 CSSM_Decrypt‐
       DataInitP(3)

       Functions for the CSP SPI:

       CSP_QuerySize(3),      CSP_DecryptData(3),      CSP_EncryptDataInit(3),
       CSP_EncryptDataFinal(3)

							  EncryptDataUpdate(3)
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