ssl/libcrypto/src/crypto/rand/rand_lib.c
changeset 31 ce057bb09d0b
parent 0 e4d67989cc36
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ssl/libcrypto/src/crypto/rand/rand_lib.c	Fri Jun 04 16:20:51 2010 +0100
@@ -0,0 +1,190 @@
+/* crypto/rand/rand_lib.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * 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.]
+ */
+/*
+ © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
+ */
+
+
+#include <stdio.h>
+#include <time.h>
+#include "cryptlib.h"
+#include <openssl/rand.h>
+#ifndef OPENSSL_NO_ENGINE
+#include <openssl/engine.h>
+#endif
+#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))
+#include "libcrypto_wsd_macros.h"
+#include "libcrypto_wsd.h"
+#endif
+
+
+#ifndef OPENSSL_NO_ENGINE
+/* non-NULL if default_RAND_meth is ENGINE-provided */
+static ENGINE *funct_ref =NULL;
+#endif
+#ifndef EMULATOR
+static const RAND_METHOD *default_RAND_meth = NULL;
+#else
+GET_STATIC_VAR_FROM_TLS(default_RAND_meth,rand_lib,const RAND_METHOD *)
+#define default_RAND_meth (*GET_WSD_VAR_NAME(default_RAND_meth,rand_lib, s)())
+#endif
+
+EXPORT_C int RAND_set_rand_method(const RAND_METHOD *meth)
+	{
+#ifndef OPENSSL_NO_ENGINE
+	if(funct_ref)
+		{
+		ENGINE_finish(funct_ref);
+		funct_ref = NULL;
+		}
+#endif
+	default_RAND_meth = meth;
+	return 1;
+	}
+
+EXPORT_C 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)
+				{
+				ENGINE_finish(e);
+				e = NULL;
+				}
+			}
+		if(e)
+			funct_ref = e;
+		else
+#endif
+			default_RAND_meth = RAND_SSLeay();
+		}
+	return default_RAND_meth;
+	}
+
+#ifndef OPENSSL_NO_ENGINE
+EXPORT_C 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)
+			{
+			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
+
+EXPORT_C void RAND_cleanup(void)
+	{
+	const RAND_METHOD *meth = RAND_get_rand_method();
+	if (meth && meth->cleanup)
+		meth->cleanup();
+	RAND_set_rand_method(NULL);
+	}
+
+EXPORT_C void RAND_seed(const void *buf, int num)
+	{
+	const RAND_METHOD *meth = RAND_get_rand_method();
+	if (meth && meth->seed)
+		meth->seed(buf,num);
+	}
+
+EXPORT_C 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);
+	}
+
+EXPORT_C int RAND_bytes(unsigned char *buf, int num)
+	{
+	const RAND_METHOD *meth = RAND_get_rand_method();
+	if (meth && meth->bytes)
+		return meth->bytes(buf,num);
+	return(-1);
+	}
+
+EXPORT_C 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);
+	}
+
+EXPORT_C int RAND_status(void)
+	{
+	const RAND_METHOD *meth = RAND_get_rand_method();
+	if (meth && meth->status)
+		return meth->status();
+	return 0;
+	}