X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fengine%2Feng_rdrand.c;h=7dd3b9fdf6fa1b6d7e9eb9788fd8ccad9a87d68e;hp=9316d6fe21d0f6a606a6c185a54b2dce0a06205d;hb=24fd8541d47a46052b975db98b465faa7e4d898c;hpb=0f113f3ee4d629ef9a4a30911b22b224772085e5;ds=sidebyside

diff --git a/crypto/engine/eng_rdrand.c b/crypto/engine/eng_rdrand.c
index 9316d6fe21..7dd3b9fdf6 100644
--- a/crypto/engine/eng_rdrand.c
+++ b/crypto/engine/eng_rdrand.c
@@ -1,86 +1,35 @@
-/* ====================================================================
- * Copyright (c) 2011 The OpenSSL Project.  All rights reserved.
+/*
+ * Copyright 2011-2018 The OpenSSL Project Authors. 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.
- * ====================================================================
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
  */
 
 #include <openssl/opensslconf.h>
 
 #include <stdio.h>
 #include <string.h>
-#include <openssl/engine.h>
+#include "internal/engine.h"
+#include "internal/cryptlib.h"
 #include <openssl/rand.h>
 #include <openssl/err.h>
+#include <openssl/crypto.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);
+size_t OPENSSL_ia32_rdrand_bytes(unsigned char *buf, size_t len);
 
 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);
+    if (num < 0) {
+        return 0;
     }
 
-    return 1;
+    return (size_t)num == OPENSSL_ia32_rdrand_bytes(buf, (size_t)num);
 }
 
 static int random_status(void)
@@ -120,7 +69,7 @@ static int bind_helper(ENGINE *e)
 static ENGINE *ENGINE_rdrand(void)
 {
     ENGINE *ret = ENGINE_new();
-    if (!ret)
+    if (ret == NULL)
         return NULL;
     if (!bind_helper(ret)) {
         ENGINE_free(ret);
@@ -129,10 +78,8 @@ static ENGINE *ENGINE_rdrand(void)
     return ret;
 }
 
-void ENGINE_load_rdrand(void)
+void engine_load_rdrand_int(void)
 {
-    extern unsigned int OPENSSL_ia32cap_P[];
-
     if (OPENSSL_ia32cap_P[1] & (1 << (62 - 32))) {
         ENGINE *toadd = ENGINE_rdrand();
         if (!toadd)
@@ -143,7 +90,7 @@ void ENGINE_load_rdrand(void)
     }
 }
 #else
-void ENGINE_load_rdrand(void)
+void engine_load_rdrand_int(void)
 {
 }
 #endif