NAME

CSP_DigestData

SYNOPSIS

CSSM_RETURN CSSMSPI CSP_DigestData
    (CSSM_CSP_HANDLE CSPHandle,
    CSSM_CC_HANDLE CCHandle,
    const CSSM_CONTEXT_PTR Context,
    const CSSM_DATA_PTR DataBufs,
    uint32 DataBufCount,
    CSSM_DATA_PTR Digest)

DESCRIPTION

This function computes a message digest for the supplied data.

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.

CCHandle (input)

The handle that describes the context of this cryptographic operation used to link to the CSP-managed information.

Context (input)

Pointer to CSSM_CONTEXT structure that describes the attributes with this context.

DataBufs (input)

A pointer to one or more CSSM_DATA structures containing the supplied data.

DataBufCount (input)

The number of DataBufs.

Digest (output)

A pointer to the CSSM_DATA structure for the message digest.

RETURN VALUE

A CSSM return value. This function returns CSSM_OK if successful and returns an error code if an error has occurred.

ERRORS

CSSM_CSP_INVALID_CSP_HANDLE

Invalid CSP handle.

CSSM_CSP_INVALID_CONTEXT_HANDLE

Invalid context handle.

CSSM_CSP_INVALID_CONTEXT_POINTER

Invalid CSSM_CONTEXT pointer.

CSSM_CSP_INVALID_CONTEXT

Context type and operation do not match.

CSSM_CSP_INVALID_DATA_POINTER

Invalid input or output CSSM_DATA pointer.

CSSM_CSP_INVALID_DATA_COUNT

Invalid input data count; data count cannot be 0.

CSSM_CSP_INVALID_DATA

Invalid input or output CSSM_DATA buffer.

CSSM_CSP_NOT_ENOUGH_BUFFER

The output buffer is not big enough.

CSSM_CSP_INVALID_ALGORITHM

Unknown algorithm.

CSSM_CSP_MEMORY_ERROR

Not enough memory to allocate.

CSSM_CSP_OPERATION_UNSUPPORTED

Digest service not supported.

CSSM_CSP_OPERATION_FAILED

Cryptographic operation failed.

CSSM_CSP_VECTOROFBUFS_UNSUPPORTED

Supports only a single buffer of input.

Comments

The output can be obtained either by filling the caller-supplied buffer or using the application's memory allocation functions to allocate space, application has to free the memory in this case. If the output buffer pointer this is NULL, an error code CSSM_CSP_INVALID_DATA_POINTER is returned.

SEE ALSO

CSP_DigestDataInit, CSP_DigestDataUpdate,
CSP_DigestDataFinal, CSP_DigestDataClone