static int
bench_mac_init (struct bench_obj *obj)
{
struct bench_mac_mode *mode = obj->priv;
gcry_mac_hd_t hd;
int err;
unsigned int keylen;
void *key;
obj->min_bufsize = BUF_START_SIZE;
obj->max_bufsize = BUF_END_SIZE;
obj->step_size = BUF_STEP_SIZE;
obj->num_measure_repetitions = num_measurement_repetitions;
keylen = gcry_mac_get_algo_keylen (mode->algo);
if (keylen == 0)
keylen = 32;
key = malloc (keylen);
if (!key)
{
fprintf (stderr, PGM ": couldn't allocate %d bytes\n", keylen);
exit (1);
}
memset(key, 42, keylen);
err = gcry_mac_open (&hd, mode->algo, 0, NULL);
if (err)
{
fprintf (stderr, PGM ": error opening mac `%s'\n",
gcry_mac_algo_name (mode->algo));
free (key);
exit (1);
}
err = gcry_mac_setkey (hd, key, keylen);
free (key);
if (err)
{
fprintf (stderr, PGM ": error setting key for mac `%s'\n",
gcry_mac_algo_name (mode->algo));
exit (1);
}
obj->priv = hd;
return 0;
}
QCryptoHmac *qcrypto_hmac_new(QCryptoHashAlgorithm alg,
const uint8_t *key, size_t nkey,
Error **errp)
{
QCryptoHmac *hmac;
QCryptoHmacGcrypt *ctx;
gcry_error_t err;
if (!qcrypto_hmac_supports(alg)) {
error_setg(errp, "Unsupported hmac algorithm %s",
QCryptoHashAlgorithm_lookup[alg]);
return NULL;
}
hmac = g_new0(QCryptoHmac, 1);
hmac->alg = alg;
ctx = g_new0(QCryptoHmacGcrypt, 1);
err = gcry_mac_open(&ctx->handle, qcrypto_hmac_alg_map[alg],
GCRY_MAC_FLAG_SECURE, NULL);
if (err != 0) {
error_setg(errp, "Cannot initialize hmac: %s",
gcry_strerror(err));
goto error;
}
err = gcry_mac_setkey(ctx->handle, (const void *)key, nkey);
if (err != 0) {
error_setg(errp, "Cannot set key: %s",
gcry_strerror(err));
goto error;
}
hmac->opaque = ctx;
return hmac;
error:
g_free(ctx);
g_free(hmac);
return NULL;
}