151 lines
3.8 KiB
C
151 lines
3.8 KiB
C
/*
|
|
* QEMU Crypto initialization
|
|
*
|
|
* Copyright (c) 2015 Red Hat, Inc.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "crypto/init.h"
|
|
#include "qapi/error.h"
|
|
#include "qemu/thread.h"
|
|
|
|
#ifdef CONFIG_GNUTLS
|
|
#include <gnutls/gnutls.h>
|
|
#include <gnutls/crypto.h>
|
|
#endif
|
|
|
|
#ifdef CONFIG_GCRYPT
|
|
#include <gcrypt.h>
|
|
#endif
|
|
|
|
/* #define DEBUG_GNUTLS */
|
|
|
|
/*
|
|
* If GNUTLS is built against GCrypt then
|
|
*
|
|
* - When GNUTLS >= 2.12, we must not initialize gcrypt threading
|
|
* because GNUTLS will do that itself
|
|
* - When GNUTLS < 2.12 we must always initialize gcrypt threading
|
|
* - When GNUTLS is disabled we must always initialize gcrypt threading
|
|
*
|
|
* But....
|
|
*
|
|
* When gcrypt >= 1.6.0 we must not initialize gcrypt threading
|
|
* because gcrypt will do that itself.
|
|
*
|
|
* So we need to init gcrypt threading if
|
|
*
|
|
* - gcrypt < 1.6.0
|
|
* AND
|
|
* - gnutls < 2.12
|
|
* OR
|
|
* - gnutls is disabled
|
|
*
|
|
*/
|
|
|
|
#if (defined(CONFIG_GCRYPT) && \
|
|
(!defined(CONFIG_GNUTLS) || \
|
|
!defined(GNUTLS_VERSION_NUMBER) || \
|
|
(GNUTLS_VERSION_NUMBER < 0x020c00)) && \
|
|
(!defined(GCRYPT_VERSION_NUMBER) || \
|
|
(GCRYPT_VERSION_NUMBER < 0x010600)))
|
|
#define QCRYPTO_INIT_GCRYPT_THREADS
|
|
#else
|
|
#undef QCRYPTO_INIT_GCRYPT_THREADS
|
|
#endif
|
|
|
|
#ifdef DEBUG_GNUTLS
|
|
static void qcrypto_gnutls_log(int level, const char *str)
|
|
{
|
|
fprintf(stderr, "%d: %s", level, str);
|
|
}
|
|
#endif
|
|
|
|
#ifdef QCRYPTO_INIT_GCRYPT_THREADS
|
|
static int qcrypto_gcrypt_mutex_init(void **priv)
|
|
{ \
|
|
QemuMutex *lock = NULL;
|
|
lock = g_new0(QemuMutex, 1);
|
|
qemu_mutex_init(lock);
|
|
*priv = lock;
|
|
return 0;
|
|
}
|
|
|
|
static int qcrypto_gcrypt_mutex_destroy(void **priv)
|
|
{
|
|
QemuMutex *lock = *priv;
|
|
qemu_mutex_destroy(lock);
|
|
g_free(lock);
|
|
return 0;
|
|
}
|
|
|
|
static int qcrypto_gcrypt_mutex_lock(void **priv)
|
|
{
|
|
QemuMutex *lock = *priv;
|
|
qemu_mutex_lock(lock);
|
|
return 0;
|
|
}
|
|
|
|
static int qcrypto_gcrypt_mutex_unlock(void **priv)
|
|
{
|
|
QemuMutex *lock = *priv;
|
|
qemu_mutex_unlock(lock);
|
|
return 0;
|
|
}
|
|
|
|
static struct gcry_thread_cbs qcrypto_gcrypt_thread_impl = {
|
|
(GCRY_THREAD_OPTION_PTHREAD | (GCRY_THREAD_OPTION_VERSION << 8)),
|
|
NULL,
|
|
qcrypto_gcrypt_mutex_init,
|
|
qcrypto_gcrypt_mutex_destroy,
|
|
qcrypto_gcrypt_mutex_lock,
|
|
qcrypto_gcrypt_mutex_unlock,
|
|
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
|
|
};
|
|
#endif /* QCRYPTO_INIT_GCRYPT */
|
|
|
|
int qcrypto_init(Error **errp)
|
|
{
|
|
#ifdef CONFIG_GNUTLS
|
|
int ret;
|
|
ret = gnutls_global_init();
|
|
if (ret < 0) {
|
|
error_setg(errp,
|
|
"Unable to initialize GNUTLS library: %s",
|
|
gnutls_strerror(ret));
|
|
return -1;
|
|
}
|
|
#ifdef DEBUG_GNUTLS
|
|
gnutls_global_set_log_level(10);
|
|
gnutls_global_set_log_function(qcrypto_gnutls_log);
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef CONFIG_GCRYPT
|
|
if (!gcry_check_version(GCRYPT_VERSION)) {
|
|
error_setg(errp, "Unable to initialize gcrypt");
|
|
return -1;
|
|
}
|
|
#ifdef QCRYPTO_INIT_GCRYPT_THREADS
|
|
gcry_control(GCRYCTL_SET_THREAD_CBS, &qcrypto_gcrypt_thread_impl);
|
|
#endif /* QCRYPTO_INIT_GCRYPT_THREADS */
|
|
gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|