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/*
* QEMU Crypto af_alg support
*
* Copyright (c) 2017 HUAWEI TECHNOLOGIES CO., LTD.
*
* Authors:
* Longpeng(Mike) <longpeng2@huawei.com>
*
* 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 "qemu/cutils.h"
#include "qemu/sockets.h"
#include "qapi/error.h"
#include "afalgpriv.h"
static bool
qcrypto_afalg_build_saddr(const char *type, const char *name,
struct sockaddr_alg *salg, Error **errp)
{
salg->salg_family = AF_ALG;
if (strnlen(type, SALG_TYPE_LEN_MAX) >= SALG_TYPE_LEN_MAX) {
error_setg(errp, "Afalg type(%s) is larger than %d bytes",
type, SALG_TYPE_LEN_MAX);
return false;
}
if (strnlen(name, SALG_NAME_LEN_MAX) >= SALG_NAME_LEN_MAX) {
error_setg(errp, "Afalg name(%s) is larger than %d bytes",
name, SALG_NAME_LEN_MAX);
return false;
}
pstrcpy((char *)salg->salg_type, SALG_TYPE_LEN_MAX, type);
pstrcpy((char *)salg->salg_name, SALG_NAME_LEN_MAX, name);
return true;
}
static int
qcrypto_afalg_socket_bind(const char *type, const char *name,
Error **errp)
{
int sbind;
struct sockaddr_alg salg = {0};
if (!qcrypto_afalg_build_saddr(type, name, &salg, errp)) {
return -1;
}
sbind = qemu_socket(AF_ALG, SOCK_SEQPACKET, 0);
if (sbind < 0) {
error_setg_errno(errp, errno, "Failed to create socket");
return -1;
}
if (bind(sbind, (const struct sockaddr *)&salg, sizeof(salg)) != 0) {
error_setg_errno(errp, errno, "Failed to bind socket");
close(sbind);
return -1;
}
return sbind;
}
QCryptoAFAlgo *
qcrypto_afalg_comm_alloc(const char *type, const char *name,
Error **errp)
{
QCryptoAFAlgo *afalg;
afalg = g_new0(QCryptoAFAlgo, 1);
/* initialize crypto API socket */
afalg->opfd = -1;
afalg->tfmfd = qcrypto_afalg_socket_bind(type, name, errp);
if (afalg->tfmfd == -1) {
goto error;
}
afalg->opfd = qemu_accept(afalg->tfmfd, NULL, 0);
if (afalg->opfd == -1) {
error_setg_errno(errp, errno, "Failed to accept socket");
goto error;
}
return afalg;
error:
qcrypto_afalg_comm_free(afalg);
return NULL;
}
void qcrypto_afalg_comm_free(QCryptoAFAlgo *afalg)
{
if (!afalg) {
return;
}
if (afalg->msg) {
g_free(afalg->msg->msg_control);
g_free(afalg->msg);
}
if (afalg->tfmfd != -1) {
close(afalg->tfmfd);
}
if (afalg->opfd != -1) {
close(afalg->opfd);
}
g_free(afalg);
}
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