hmac_sha1_preparekey
hmac_sha1_preparekey(HMAC_SHA1_KEY(tfm), raw_key, keylen);
hmac_sha1_preparekey(&k.sha1, raw_key, raw_key_len);
hmac_sha1_preparekey(&key, auth_key, auth_keylen);
void hmac_sha1_preparekey(struct hmac_sha1_key *key,
EXPORT_SYMBOL_GPL(hmac_sha1_preparekey);
#define HMAC_PREPAREKEY hmac_sha1_preparekey
hmac_sha1_preparekey(&hinfo->key.sha1,