Add qemu 2.4.0

[kvmfornfv.git] / qemu / crypto / init.c

diff --git a/qemu/crypto/init.c b/qemu/crypto/init.c
new file mode 100644 (file)
index 0000000..7447882
--- /dev/null
+++ b/qemu/crypto/init.c
@@ -0,0 +1,150 @@
+/*
+ * 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 "crypto/init.h"
+#include "qemu/thread.h"
+
+#ifdef CONFIG_GNUTLS
+#include <gnutls/gnutls.h>
+#include <gnutls/crypto.h>
+
+#ifdef CONFIG_GNUTLS_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
+ *
+ * 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
+ *
+ */
+
+#if (defined(CONFIG_GNUTLS_GCRYPT) &&           \
+     (!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)
+{
+    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
+
+#ifdef CONFIG_GNUTLS_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;
+}
+
+#else /* ! CONFIG_GNUTLS */
+
+int qcrypto_init(Error **errp G_GNUC_UNUSED)
+{
+    return 0;
+}
+
+#endif /* ! CONFIG_GNUTLS */