libkeccak_hmac_initialise3
Initialise hmac-hashing state
Usage
#include <libkeccak.h>
int libkeccak_hmac_initialise(struct libkeccak_hmac_state *state, const struct libkeccak_spec *spec,
const void *key, size_t key_length);
Link with -lkeccak.
Overview
The libkeccak_hmac_initialise() function initialises *state and sets the algorithm tuning parameters to those specified by *spec, and the key to key of length key_length.
Return values
The libkeccak_hmac_initialise() function returns 0 upon successful completion. On error, -1 is returned and errno is set to describe the error.
Errors
The libkeccak_hmac_initialise() function may fail for any specified for the functions malloc(3) and realloc(3).