NAME
CSSM_DigestData, CSP_DigestData — Compute message digest (CDSA)
SYNOPSIS
# include <cssm.h>
API:
CSSM_RETURN CSSMAPI CSSM_DigestData
(CSSM_CC_HANDLE CCHandle,
const CSSM_DATA *DataBufs,
uint32 DataBufCount,
CSSM_DATA_PTR Digest)
SPI:
CSSM_RETURN CSSMCSPI CSP_DigestData
(CSSM_CSP_HANDLE CSPHandle,
CSSM_CC_HANDLE CCHandle,
const CSSM_CONTEXT *Context,
const CSSM_DATA *DataBufs,
uint32 DataBufCount,
CSSM_DATA_PTR Digest) |
LIBRARY
Common Security Services Manager library (cdsa$incssm300_shr.exe)
API PARAMETERS
| CCHandle (input) | | The handle that describes the context of this cryptographic
operation used to link to the CSP-managed information. |
| DataBufs (input) | | A pointer to a vector of CSSM_DATA structures that
contain the data to be operated on. |
| DataBufCount (input) |
| | | The number of DataBufs. |
| Digest (output) | | A pointer to the CSSM_DATA structure for the message
digest. |
SPI PARAMETERS
| CSPHandle (input) |
| | | The handle that describes the add-in Cryptographic
Service Provider module used to perform up calls to CSSM for the
memory functions managed by CSSM. |
| Context (input) | | Pointer to CSSM_CONTEXT structure that describes
the attributes with this context. |
DESCRIPTION
This function computes a message digest for all data contained
in the set of input buffers.
NOTES FOR API
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,
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 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
The output is returned to the caller as specifed 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 represent an error condition.
ERRORS
Errors are described in the CDSA Technical Standard.
CSSMERR_CSP_OUTPUT_LENGTH_ERROR |
SEE ALSO
Books
Intel CDSA Application Developer's Guide
Online Help
Functions for the CSSM API:
CSSM_DigestDataInit, CSSM_DigestDataUpdate, CSSM_DigestDataFinal, CSSM_DigestDataClone
Functions for the CSP SPI:
CSP_DigestDataInit, CSP_DigestDataUpdate, CSP_DigestDataFinal, CSP_DigestDataClone
