42e7e15f99
Adds afalg-backend hmac support: introduces some private APIs firstly, and then intergrates them into qcrypto_hmac_afalg_driver. Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
131 lines
3.1 KiB
C
131 lines
3.1 KiB
C
/*
|
|
* QEMU Crypto hmac algorithms
|
|
*
|
|
* Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or
|
|
* (at your option) any later version. See the COPYING file in the
|
|
* top-level directory.
|
|
*
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qapi/error.h"
|
|
#include "crypto/hmac.h"
|
|
#include "hmacpriv.h"
|
|
|
|
static const char hex[] = "0123456789abcdef";
|
|
|
|
int qcrypto_hmac_bytesv(QCryptoHmac *hmac,
|
|
const struct iovec *iov,
|
|
size_t niov,
|
|
uint8_t **result,
|
|
size_t *resultlen,
|
|
Error **errp)
|
|
{
|
|
QCryptoHmacDriver *drv = hmac->driver;
|
|
|
|
return drv->hmac_bytesv(hmac, iov, niov, result, resultlen, errp);
|
|
}
|
|
|
|
int qcrypto_hmac_bytes(QCryptoHmac *hmac,
|
|
const char *buf,
|
|
size_t len,
|
|
uint8_t **result,
|
|
size_t *resultlen,
|
|
Error **errp)
|
|
{
|
|
struct iovec iov = {
|
|
.iov_base = (char *)buf,
|
|
.iov_len = len
|
|
};
|
|
|
|
return qcrypto_hmac_bytesv(hmac, &iov, 1, result, resultlen, errp);
|
|
}
|
|
|
|
int qcrypto_hmac_digestv(QCryptoHmac *hmac,
|
|
const struct iovec *iov,
|
|
size_t niov,
|
|
char **digest,
|
|
Error **errp)
|
|
{
|
|
uint8_t *result = NULL;
|
|
size_t resultlen = 0;
|
|
size_t i;
|
|
|
|
if (qcrypto_hmac_bytesv(hmac, iov, niov, &result, &resultlen, errp) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
*digest = g_new0(char, (resultlen * 2) + 1);
|
|
|
|
for (i = 0 ; i < resultlen ; i++) {
|
|
(*digest)[(i * 2)] = hex[(result[i] >> 4) & 0xf];
|
|
(*digest)[(i * 2) + 1] = hex[result[i] & 0xf];
|
|
}
|
|
|
|
(*digest)[resultlen * 2] = '\0';
|
|
|
|
g_free(result);
|
|
return 0;
|
|
}
|
|
|
|
int qcrypto_hmac_digest(QCryptoHmac *hmac,
|
|
const char *buf,
|
|
size_t len,
|
|
char **digest,
|
|
Error **errp)
|
|
{
|
|
struct iovec iov = {
|
|
.iov_base = (char *)buf,
|
|
.iov_len = len
|
|
};
|
|
|
|
return qcrypto_hmac_digestv(hmac, &iov, 1, digest, errp);
|
|
}
|
|
|
|
QCryptoHmac *qcrypto_hmac_new(QCryptoHashAlgorithm alg,
|
|
const uint8_t *key, size_t nkey,
|
|
Error **errp)
|
|
{
|
|
QCryptoHmac *hmac;
|
|
void *ctx = NULL;
|
|
Error *err2 = NULL;
|
|
QCryptoHmacDriver *drv = NULL;
|
|
|
|
#ifdef CONFIG_AF_ALG
|
|
ctx = qcrypto_afalg_hmac_ctx_new(alg, key, nkey, &err2);
|
|
if (ctx) {
|
|
drv = &qcrypto_hmac_afalg_driver;
|
|
}
|
|
#endif
|
|
|
|
if (!ctx) {
|
|
ctx = qcrypto_hmac_ctx_new(alg, key, nkey, errp);
|
|
if (!ctx) {
|
|
return NULL;
|
|
}
|
|
|
|
drv = &qcrypto_hmac_lib_driver;
|
|
error_free(err2);
|
|
}
|
|
|
|
hmac = g_new0(QCryptoHmac, 1);
|
|
hmac->alg = alg;
|
|
hmac->opaque = ctx;
|
|
hmac->driver = (void *)drv;
|
|
|
|
return hmac;
|
|
}
|
|
|
|
void qcrypto_hmac_free(QCryptoHmac *hmac)
|
|
{
|
|
QCryptoHmacDriver *drv;
|
|
|
|
if (hmac) {
|
|
drv = hmac->driver;
|
|
drv->hmac_free(hmac);
|
|
g_free(hmac);
|
|
}
|
|
}
|