1 files changed, 149 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/engine/eng_rdrand.c b/thirdparty/openssl/crypto/engine/eng_rdrand.c
new file mode 100644
index 0000000000..9316d6fe21
--- /dev/null
+++ b/thirdparty/openssl/crypto/engine/eng_rdrand.c
@@ -0,0 +1,149 @@
+/* ====================================================================
+ * Copyright (c) 2011 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ */
+
+#include <openssl/opensslconf.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <openssl/engine.h>
+#include <openssl/rand.h>
+#include <openssl/err.h>
+
+#if (defined(__i386)   || defined(__i386__)   || defined(_M_IX86) || \
+     defined(__x86_64) || defined(__x86_64__) || \
+     defined(_M_AMD64) || defined (_M_X64)) && defined(OPENSSL_CPUID_OBJ)
+
+size_t OPENSSL_ia32_rdrand(void);
+
+static int get_random_bytes(unsigned char *buf, int num)
+{
+    size_t rnd;
+
+    while (num >= (int)sizeof(size_t)) {
+        if ((rnd = OPENSSL_ia32_rdrand()) == 0)
+            return 0;
+
+        *((size_t *)buf) = rnd;
+        buf += sizeof(size_t);
+        num -= sizeof(size_t);
+    }
+    if (num) {
+        if ((rnd = OPENSSL_ia32_rdrand()) == 0)
+            return 0;
+
+        memcpy(buf, &rnd, num);
+    }
+
+    return 1;
+}
+
+static int random_status(void)
+{
+    return 1;
+}
+
+static RAND_METHOD rdrand_meth = {
+    NULL,                       /* seed */
+    get_random_bytes,
+    NULL,                       /* cleanup */
+    NULL,                       /* add */
+    get_random_bytes,
+    random_status,
+};
+
+static int rdrand_init(ENGINE *e)
+{
+    return 1;
+}
+
+static const char *engine_e_rdrand_id = "rdrand";
+static const char *engine_e_rdrand_name = "Intel RDRAND engine";
+
+static int bind_helper(ENGINE *e)
+{
+    if (!ENGINE_set_id(e, engine_e_rdrand_id) ||
+        !ENGINE_set_name(e, engine_e_rdrand_name) ||
+        !ENGINE_set_flags(e, ENGINE_FLAGS_NO_REGISTER_ALL) ||
+        !ENGINE_set_init_function(e, rdrand_init) ||
+        !ENGINE_set_RAND(e, &rdrand_meth))
+        return 0;
+
+    return 1;
+}
+
+static ENGINE *ENGINE_rdrand(void)
+{
+    ENGINE *ret = ENGINE_new();
+    if (!ret)
+        return NULL;
+    if (!bind_helper(ret)) {
+        ENGINE_free(ret);
+        return NULL;
+    }
+    return ret;
+}
+
+void ENGINE_load_rdrand(void)
+{
+    extern unsigned int OPENSSL_ia32cap_P[];
+
+    if (OPENSSL_ia32cap_P[1] & (1 << (62 - 32))) {
+        ENGINE *toadd = ENGINE_rdrand();
+        if (!toadd)
+            return;
+        ENGINE_add(toadd);
+        ENGINE_free(toadd);
+        ERR_clear_error();
+    }
+}
+#else
+void ENGINE_load_rdrand(void)
+{
+}
+#endif