This function updates the staged message authentication code operation.

CSSM_RETURN CSSMAPI CSSM_GenerateMacUpdate (CSSM_CC_HANDLE CCHandle,
                                            const CSSM_DATA_PTR DataBufs,
                                            uint32 DataBufCount)

Input

CCHandle

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

DataBufs

A pointer to a vector of CSSM_DATA structures that contain the data to be operated on.

DataBufCount

The number of DataBufs.

CSSM_OK if the function was successful. CSSM_FAIL if an error occurred. Use CSSM_GetError to determine the exact error.