Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 75 insertions, 0 deletions

diff --git a/crypto/init.c b/crypto/init.c
new file mode 100644
index 000000000..fb7f1bff1
--- /dev/null
+++ b/crypto/init.c
@@ -0,0 +1,75 @@
+/*
+ * 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 2.1 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
+
+#include "crypto/random.h"
+
+/* #define DEBUG_GNUTLS */
+#ifdef DEBUG_GNUTLS
+static void qcrypto_gnutls_log(int level, const char *str)
+{
+    fprintf(stderr, "%d: %s", level, str);
+}
+#endif
+
+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(NULL)) {
+        error_setg(errp, "Unable to initialize gcrypt");
+        return -1;
+    }
+    gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
+#endif
+
+    if (qcrypto_random_init(errp) < 0) {
+        return -1;
+    }
+
+    return 0;
+}