Move RNG initialization to RAND_poll(), and shared definitions to

rand_lcl.h

2 files changed, 195 insertions, 121 deletions

diff --git a/crypto/rand/md_rand.c b/crypto/rand/md_rand.c
index 668da95499..0138f57e55 100644
--- a/crypto/rand/md_rand.c
+++ b/crypto/rand/md_rand.c
@@ -109,8 +109,6 @@
  *
  */
 
-#define ENTROPY_NEEDED 20  /* require 160 bits = 20 bytes of randomness */
-
 #ifdef MD_RAND_DEBUG
 # ifndef NDEBUG
 #   define NDEBUG
@@ -119,75 +117,20 @@
 
 #include <assert.h>
 #include <stdio.h>
-#include <time.h>
 #include <string.h>
 
 #include "openssl/e_os.h"
 
+#include <openssl/rand.h>
+#include "rand_lcl.h"
+
 #include <openssl/crypto.h>
 #include <openssl/err.h>
 
-#if !defined(USE_MD5_RAND) && !defined(USE_SHA1_RAND) && !defined(USE_MDC2_RAND) && !defined(USE_MD2_RAND)
-#if !defined(NO_SHA) && !defined(NO_SHA1)
-#define USE_SHA1_RAND
-#elif !defined(NO_MD5)
-#define USE_MD5_RAND
-#elif !defined(NO_MDC2) && !defined(NO_DES)
-#define USE_MDC2_RAND
-#elif !defined(NO_MD2)
-#define USE_MD2_RAND
-#else
-#error No message digest algorithm available
-#endif
-#endif
-
-/* Changed how the state buffer used.  I now attempt to 'wrap' such
- * that I don't run over the same locations the next time  go through
- * the 1023 bytes - many thanks to
- * Robert J. LeBlanc <rjl@renaissoft.com> for his comments
- */
-
-#if defined(USE_MD5_RAND)
-#include <openssl/md5.h>
-#define MD_DIGEST_LENGTH	MD5_DIGEST_LENGTH
-#define MD_CTX			MD5_CTX
-#define MD_Init(a)		MD5_Init(a)
-#define MD_Update(a,b,c)	MD5_Update(a,b,c)
-#define	MD_Final(a,b)		MD5_Final(a,b)
-#define	MD(a,b,c)		MD5(a,b,c)
-#elif defined(USE_SHA1_RAND)
-#include <openssl/sha.h>
-#define MD_DIGEST_LENGTH	SHA_DIGEST_LENGTH
-#define MD_CTX			SHA_CTX
-#define MD_Init(a)		SHA1_Init(a)
-#define MD_Update(a,b,c)	SHA1_Update(a,b,c)
-#define	MD_Final(a,b)		SHA1_Final(a,b)
-#define	MD(a,b,c)		SHA1(a,b,c)
-#elif defined(USE_MDC2_RAND)
-#include <openssl/mdc2.h>
-#define MD_DIGEST_LENGTH	MDC2_DIGEST_LENGTH
-#define MD_CTX			MDC2_CTX
-#define MD_Init(a)		MDC2_Init(a)
-#define MD_Update(a,b,c)	MDC2_Update(a,b,c)
-#define	MD_Final(a,b)		MDC2_Final(a,b)
-#define	MD(a,b,c)		MDC2(a,b,c)
-#elif defined(USE_MD2_RAND)
-#include <openssl/md2.h>
-#define MD_DIGEST_LENGTH	MD2_DIGEST_LENGTH
-#define MD_CTX			MD2_CTX
-#define MD_Init(a)		MD2_Init(a)
-#define MD_Update(a,b,c)	MD2_Update(a,b,c)
-#define	MD_Final(a,b)		MD2_Final(a,b)
-#define	MD(a,b,c)		MD2(a,b,c)
-#endif
-
-#include <openssl/rand.h>
-
 #ifdef BN_DEBUG
 # define PREDICT
 #endif
 
-/* #define NORAND	1 */
 /* #define PREDICT	1 */
 
 #define STATE_SIZE	1023
@@ -243,10 +186,6 @@ static void ssleay_rand_add(const void *buf, int num, double add)
 	unsigned char local_md[MD_DIGEST_LENGTH];
 	MD_CTX m;
 
-#ifdef NORAND
-	return;
-#endif
-
 	/*
 	 * (Based on the rand(3) manpage)
 	 *
@@ -359,56 +298,6 @@ static void ssleay_rand_seed(const void *buf, int num)
 	ssleay_rand_add(buf, num, num);
 	}
 
-static void ssleay_rand_initialize(void) /* not exported in RAND_METHOD */
-	{
-	unsigned long l;
-#ifndef GETPID_IS_MEANINGLESS
-	pid_t curr_pid = getpid();
-#endif
-#ifdef DEVRANDOM
-	FILE *fh;
-#endif
-
-#ifdef NORAND
-	return;
-#endif
-
-	CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
-	/* put in some default random data, we need more than just this */
-#ifndef GETPID_IS_MEANINGLESS
-	l=curr_pid;
-	RAND_add(&l,sizeof(l),0);
-	l=getuid();
-	RAND_add(&l,sizeof(l),0);
-#endif
-	l=time(NULL);
-	RAND_add(&l,sizeof(l),0);
-
-#ifdef DEVRANDOM
-	/* Use a random entropy pool device. Linux, FreeBSD and OpenBSD
-	 * have this. Use /dev/urandom if you can as /dev/random may block
-	 * if it runs out of random entries.  */
-
-	if ((fh = fopen(DEVRANDOM, "r")) != NULL)
-		{
-		unsigned char tmpbuf[ENTROPY_NEEDED];
-		int n;
-		
-		setvbuf(fh, NULL, _IONBF, 0);
-		n=fread((unsigned char *)tmpbuf,1,ENTROPY_NEEDED,fh);
-		fclose(fh);
-		RAND_add(tmpbuf,sizeof tmpbuf,n);
-		memset(tmpbuf,0,n);
-		}
-#endif
-#ifdef PURIFY
-	memset(state,0,STATE_SIZE);
-	memset(md,0,MD_DIGEST_LENGTH);
-#endif
-	CRYPTO_w_lock(CRYPTO_LOCK_RAND);
-	initialized=1;
-	}
-
 static int ssleay_rand_bytes(unsigned char *buf, int num)
 	{
 	static volatile int stirred_pool = 0;
@@ -452,11 +341,12 @@ static int ssleay_rand_bytes(unsigned char *buf, int num)
 	 * global 'md'.
 	 */
 
-	CRYPTO_w_lock(CRYPTO_LOCK_RAND);
-
 	if (!initialized)
-		ssleay_rand_initialize();
+		RAND_poll();
+
+	CRYPTO_w_lock(CRYPTO_LOCK_RAND);
 
+	initialized = 1;
 	if (!stirred_pool)
 		do_stir_pool = 1;
 	
@@ -598,12 +488,12 @@ static int ssleay_rand_status(void)
 	{
 	int ret;
 
-	CRYPTO_w_lock(CRYPTO_LOCK_RAND);
-
 	if (!initialized)
-		ssleay_rand_initialize();
-	ret = entropy >= ENTROPY_NEEDED;
+		RAND_poll();
 
+	CRYPTO_w_lock(CRYPTO_LOCK_RAND);
+	initialized = 1;
+	ret = entropy >= ENTROPY_NEEDED;
 	CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
 
 	return ret;
diff --git a/crypto/rand/rand_lcl.h b/crypto/rand/rand_lcl.h
new file mode 100644
index 0000000000..120e9366d2
--- /dev/null
+++ b/crypto/rand/rand_lcl.h
@@ -0,0 +1,184 @@
+/* crypto/rand/md_rand.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.]
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2000 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
+ *    openssl-core@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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#ifndef HEADER_RAND_LCL_H
+#define HEADER_RAND_LCL_H
+
+#define ENTROPY_NEEDED 20  /* require 160 bits = 20 bytes of randomness */
+
+
+#if !defined(USE_MD5_RAND) && !defined(USE_SHA1_RAND) && !defined(USE_MDC2_RAND) && !defined(USE_MD2_RAND)
+#if !defined(NO_SHA) && !defined(NO_SHA1)
+#define USE_SHA1_RAND
+#elif !defined(NO_MD5)
+#define USE_MD5_RAND
+#elif !defined(NO_MDC2) && !defined(NO_DES)
+#define USE_MDC2_RAND
+#elif !defined(NO_MD2)
+#define USE_MD2_RAND
+#else
+#error No message digest algorithm available
+#endif
+#endif
+
+#if defined(USE_MD5_RAND)
+#include <openssl/md5.h>
+#define MD_DIGEST_LENGTH	MD5_DIGEST_LENGTH
+#define	MD(a,b,c)		MD5(a,b,c)
+#elif defined(USE_SHA1_RAND)
+#include <openssl/sha.h>
+#define MD_DIGEST_LENGTH	SHA_DIGEST_LENGTH
+#define	MD(a,b,c)		SHA1(a,b,c)
+#elif defined(USE_MDC2_RAND)
+#include <openssl/mdc2.h>
+#define MD_DIGEST_LENGTH	MDC2_DIGEST_LENGTH
+#define	MD(a,b,c)		MDC2(a,b,c)
+#elif defined(USE_MD2_RAND)
+#include <openssl/md2.h>
+#define MD_DIGEST_LENGTH	MD2_DIGEST_LENGTH
+#define	MD(a,b,c)		MD2(a,b,c)
+#endif
+#if defined(USE_MD5_RAND)
+#include <openssl/md5.h>
+#define MD_DIGEST_LENGTH	MD5_DIGEST_LENGTH
+#define MD_CTX			MD5_CTX
+#define MD_Init(a)		MD5_Init(a)
+#define MD_Update(a,b,c)	MD5_Update(a,b,c)
+#define	MD_Final(a,b)		MD5_Final(a,b)
+#define	MD(a,b,c)		MD5(a,b,c)
+#elif defined(USE_SHA1_RAND)
+#include <openssl/sha.h>
+#define MD_DIGEST_LENGTH	SHA_DIGEST_LENGTH
+#define MD_CTX			SHA_CTX
+#define MD_Init(a)		SHA1_Init(a)
+#define MD_Update(a,b,c)	SHA1_Update(a,b,c)
+#define	MD_Final(a,b)		SHA1_Final(a,b)
+#define	MD(a,b,c)		SHA1(a,b,c)
+#elif defined(USE_MDC2_RAND)
+#include <openssl/mdc2.h>
+#define MD_DIGEST_LENGTH	MDC2_DIGEST_LENGTH
+#define MD_CTX			MDC2_CTX
+#define MD_Init(a)		MDC2_Init(a)
+#define MD_Update(a,b,c)	MDC2_Update(a,b,c)
+#define	MD_Final(a,b)		MDC2_Final(a,b)
+#define	MD(a,b,c)		MDC2(a,b,c)
+#elif defined(USE_MD2_RAND)
+#include <openssl/md2.h>
+#define MD_DIGEST_LENGTH	MD2_DIGEST_LENGTH
+#define MD_CTX			MD2_CTX
+#define MD_Init(a)		MD2_Init(a)
+#define MD_Update(a,b,c)	MD2_Update(a,b,c)
+#define	MD_Final(a,b)		MD2_Final(a,b)
+#define	MD(a,b,c)		MD2(a,b,c)
+#endif
+
+
+#endif