This function initializes the staged message authentication code verification operation.

CSSM_RETURN CSSMAPI CSSM_VerifyMacInit (CSSM_CC_HANDLE CCHandle)

Input

CCHandle

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

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