- int crypto_ahash_finup(struct ahash_request * req);
- reference to the ahash_request handle that holds all information needed to perform the cipher operation
This function is a "short-hand" for the function calls of crypto_ahash_update and crypto_shash_final. The parameters have the same meaning as discussed for those separate functions.
0 if the message digest creation was successful; < 0 if an error occurred