krb5int_hmac
ret = krb5int_hmac(hash, key, iov, 5, &prf);
err = krb5int_hmac(h, k, &iov, 1, out);
ret = krb5int_hmac(ctp->hash, kc, data, num_data, output);
ret = krb5int_hmac(ctp->hash, key, &iov, 1, &ds);
krb5_error_code krb5int_hmac(const struct krb5_hash_provider *hash,
ret = krb5int_hmac(hash, ki, data, num_data, &d2);
ret = krb5int_hmac(hash, ki, data, num_data, &d1);
return krb5int_hmac(&krb5int_hash_sha1, key, &iov, 1, out);