-/* crypto/rand/rand_lib.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * 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 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 acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS 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 AUTHOR OR 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.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * Licensed under the OpenSSL license (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 <stdio.h>
#include <time.h>
-#include <openssl/rand.h>
+#include "internal/cryptlib.h"
+#include <openssl/opensslconf.h>
+#include "internal/rand.h"
-#ifdef NO_RAND
-static RAND_METHOD *rand_meth=NULL;
-#else
-extern RAND_METHOD rand_ssleay_meth;
-static RAND_METHOD *rand_meth= &rand_ssleay_meth;
+#include <openssl/engine.h>
+
+#ifndef OPENSSL_NO_ENGINE
+/* non-NULL if default_RAND_meth is ENGINE-provided */
+static ENGINE *funct_ref = NULL;
#endif
+static const RAND_METHOD *default_RAND_meth = NULL;
-void RAND_set_rand_method(RAND_METHOD *meth)
- {
- rand_meth=meth;
- }
+int RAND_set_rand_method(const RAND_METHOD *meth)
+{
+#ifndef OPENSSL_NO_ENGINE
+ ENGINE_finish(funct_ref);
+ funct_ref = NULL;
+#endif
+ default_RAND_meth = meth;
+ return 1;
+}
-RAND_METHOD *RAND_get_rand_method(void)
- {
- return(rand_meth);
- }
+const RAND_METHOD *RAND_get_rand_method(void)
+{
+ if (!default_RAND_meth) {
+#ifndef OPENSSL_NO_ENGINE
+ ENGINE *e = ENGINE_get_default_RAND();
+ if (e) {
+ default_RAND_meth = ENGINE_get_RAND(e);
+ if (default_RAND_meth == NULL) {
+ ENGINE_finish(e);
+ e = NULL;
+ }
+ }
+ if (e)
+ funct_ref = e;
+ else
+#endif
+ default_RAND_meth = RAND_OpenSSL();
+ }
+ return default_RAND_meth;
+}
-void RAND_cleanup(void)
- {
- if (rand_meth != NULL)
- rand_meth->cleanup();
- }
+#ifndef OPENSSL_NO_ENGINE
+int RAND_set_rand_engine(ENGINE *engine)
+{
+ const RAND_METHOD *tmp_meth = NULL;
+ if (engine) {
+ if (!ENGINE_init(engine))
+ return 0;
+ tmp_meth = ENGINE_get_RAND(engine);
+ if (tmp_meth == NULL) {
+ ENGINE_finish(engine);
+ return 0;
+ }
+ }
+ /* This function releases any prior ENGINE so call it first */
+ RAND_set_rand_method(tmp_meth);
+ funct_ref = engine;
+ return 1;
+}
+#endif
+
+void rand_cleanup_int(void)
+{
+ const RAND_METHOD *meth = default_RAND_meth;
+ if (meth && meth->cleanup)
+ meth->cleanup();
+ RAND_set_rand_method(NULL);
+}
void RAND_seed(const void *buf, int num)
- {
- if (rand_meth != NULL)
- rand_meth->seed(buf,num);
- }
+{
+ const RAND_METHOD *meth = RAND_get_rand_method();
+ if (meth && meth->seed)
+ meth->seed(buf, num);
+}
-void RAND_add(const void *buf, int num, int entropy)
- {
- if (rand_meth != NULL)
- rand_meth->add(buf,num,entropy);
- }
+void RAND_add(const void *buf, int num, double entropy)
+{
+ const RAND_METHOD *meth = RAND_get_rand_method();
+ if (meth && meth->add)
+ meth->add(buf, num, entropy);
+}
int RAND_bytes(unsigned char *buf, int num)
- {
- if (rand_meth != NULL)
- return rand_meth->bytes(buf,num);
- return(-1);
- }
+{
+ const RAND_METHOD *meth = RAND_get_rand_method();
+ if (meth && meth->bytes)
+ return meth->bytes(buf, num);
+ return (-1);
+}
+
+#if OPENSSL_API_COMPAT < 0x10100000L
+int RAND_pseudo_bytes(unsigned char *buf, int num)
+{
+ const RAND_METHOD *meth = RAND_get_rand_method();
+ if (meth && meth->pseudorand)
+ return meth->pseudorand(buf, num);
+ return (-1);
+}
+#endif
+int RAND_status(void)
+{
+ const RAND_METHOD *meth = RAND_get_rand_method();
+ if (meth && meth->status)
+ return meth->status();
+ return 0;
+}
projects / openssl.git / blobdiff