[thirdparty/openssl.git] / crypto / rand / rand_unix.c

/* crypto/rand/rand_unix.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).
 *
 */

#define USE_SOCKETS
#include "e_os.h"
#include "cryptlib.h"
#include <openssl/rand.h>
#include "rand_lcl.h"

#if !(defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_VXWORKS))

#include <sys/types.h>
#include <sys/time.h>
#include <sys/times.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>

int RAND_poll(void)
{
	unsigned long l;
	pid_t curr_pid = getpid();
#if defined(DEVRANDOM) || defined(DEVRANDOM_EGD)
	unsigned char tmpbuf[ENTROPY_NEEDED];
	int n = 0;
#endif
#ifdef DEVRANDOM
	static const char *randomfiles[] = { DEVRANDOM, NULL };
	const char **randomfile = NULL;
	int fd;
#endif
#ifdef DEVRANDOM_EGD
	static const char *egdsockets[] = { DEVRANDOM_EGD, NULL };
	const char **egdsocket = NULL;
#endif

#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.  */

	for (randomfile = randomfiles; *randomfile && n < ENTROPY_NEEDED; randomfile++)
		{
		if ((fd = open(*randomfile, O_RDONLY|O_NONBLOCK
#ifdef O_NOCTTY /* If it happens to be a TTY (god forbid), do not make it
		   our controlling tty */
			|O_NOCTTY
#endif
#ifdef O_NOFOLLOW /* Fail if the file is a symbolic link */
			|O_NOFOLLOW
#endif
			)) >= 0)
			{
			struct timeval t = { 0, 10*1000 }; /* Spend 10ms on
							      each file. */
			int r;
			fd_set fset;

			do
				{
				FD_ZERO(&fset);
				FD_SET(fd, &fset);
				r = -1;

				if (select(fd+1,&fset,NULL,NULL,&t) < 0)
					t.tv_usec=0;
				else if (FD_ISSET(fd, &fset))
					{
					r=read(fd,(unsigned char *)tmpbuf+n,
					       ENTROPY_NEEDED-n);
					if (r > 0)
						n += r;
					}

				/* Some Unixen will update t, some
				   won't.  For those who won't, give
				   up here, otherwise, we will do
				   this once again for the remaining
				   time. */
				if (t.tv_usec == 10*1000)
					t.tv_usec=0;
				}
			while ((r > 0 || (errno == EINTR || errno == EAGAIN))
				&& t.tv_usec != 0 && n < ENTROPY_NEEDED);

			close(fd);
			}
		}
#endif

#ifdef DEVRANDOM_EGD
	/* Use an EGD socket to read entropy from an EGD or PRNGD entropy
	 * collecting daemon. */

	for (egdsocket = egdsockets; *egdsocket && n < ENTROPY_NEEDED; egdsocket++)
		{
		int r;

		r = RAND_query_egd_bytes(*egdsocket, (unsigned char *)tmpbuf+n,
					 ENTROPY_NEEDED-n);
		if (r > 0)
			n += r;
		}
#endif

#if defined(DEVRANDOM) || defined(DEVRANDOM_EGD)
	if (n > 0)
		{
		RAND_add(tmpbuf,sizeof tmpbuf,n);
		memset(tmpbuf,0,n);
		}
#endif

	/* put in some default random data, we need more than just this */
	l=curr_pid;
	RAND_add(&l,sizeof(l),0);
	l=getuid();
	RAND_add(&l,sizeof(l),0);

	l=time(NULL);
	RAND_add(&l,sizeof(l),0);

#if defined(DEVRANDOM) || defined(DEVRANDOM_EGD)
	return 1;
#else
	return 0;
#endif
}

#endif
Commit	Line	Data
0c61e299 RL	1	/* crypto/rand/rand_unix.c */
	2	/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
	3	* All rights reserved.
	4	*
	5	* This package is an SSL implementation written
	6	* by Eric Young (eay@cryptsoft.com).
	7	* The implementation was written so as to conform with Netscapes SSL.
	8	*
	9	* This library is free for commercial and non-commercial use as long as
	10	* the following conditions are aheared to. The following conditions
	11	* apply to all code found in this distribution, be it the RC4, RSA,
	12	* lhash, DES, etc., code; not just the SSL code. The SSL documentation
	13	* included with this distribution is covered by the same copyright terms
	14	* except that the holder is Tim Hudson (tjh@cryptsoft.com).
	15	*
	16	* Copyright remains Eric Young's, and as such any Copyright notices in
	17	* the code are not to be removed.
	18	* If this package is used in a product, Eric Young should be given attribution
	19	* as the author of the parts of the library used.
	20	* This can be in the form of a textual message at program startup or
	21	* in documentation (online or textual) provided with the package.
	22	*
	23	* Redistribution and use in source and binary forms, with or without
	24	* modification, are permitted provided that the following conditions
	25	* are met:
	26	* 1. Redistributions of source code must retain the copyright
	27	* notice, this list of conditions and the following disclaimer.
	28	* 2. Redistributions in binary form must reproduce the above copyright
	29	* notice, this list of conditions and the following disclaimer in the
	30	* documentation and/or other materials provided with the distribution.
	31	* 3. All advertising materials mentioning features or use of this software
	32	* must display the following acknowledgement:
	33	* "This product includes cryptographic software written by
	34	* Eric Young (eay@cryptsoft.com)"
	35	* The word 'cryptographic' can be left out if the rouines from the library
	36	* being used are not cryptographic related :-).
	37	* 4. If you include any Windows specific code (or a derivative thereof) from
	38	* the apps directory (application code) you must include an acknowledgement:
	39	* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
	40	*
	41	* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
	42	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	43	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	44	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	45	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	46	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	47	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	48	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	49	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	50	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	51	* SUCH DAMAGE.
	52	*
	53	* The licence and distribution terms for any publically available version or
	54	* derivative of this code cannot be changed. i.e. this code cannot simply be
	55	* copied and put under another distribution licence
	56	* [including the GNU Public Licence.]
	57	*/
	58	/* ====================================================================
	59	* Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
	60	*
	61	* Redistribution and use in source and binary forms, with or without
	62	* modification, are permitted provided that the following conditions
	63	* are met:
	64	*
65	* 1. Redistributions of source code must retain the above copyright
66	* notice, this list of conditions and the following disclaimer.
67	*
68	* 2. Redistributions in binary form must reproduce the above copyright
69	* notice, this list of conditions and the following disclaimer in
70	* the documentation and/or other materials provided with the
71	* distribution.
72	*
73	* 3. All advertising materials mentioning features or use of this
74	* software must display the following acknowledgment:
75	* "This product includes software developed by the OpenSSL Project
76	* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77	*
78	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79	* endorse or promote products derived from this software without
80	* prior written permission. For written permission, please contact
81	* openssl-core@openssl.org.
82	*
83	* 5. Products derived from this software may not be called "OpenSSL"
84	* nor may "OpenSSL" appear in their names without prior written
85	* permission of the OpenSSL Project.
86	*
87	* 6. Redistributions of any form whatsoever must retain the following
88	* acknowledgment:
89	* "This product includes software developed by the OpenSSL Project
90	* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91	*
92	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103	* OF THE POSSIBILITY OF SUCH DAMAGE.
104	* ====================================================================
105	*
106	* This product includes cryptographic software written by Eric Young
107	* (eay@cryptsoft.com). This product includes software written by Tim
108	* Hudson (tjh@cryptsoft.com).
109	*
110	*/
111
a947f2d2	112	#define USE_SOCKETS
da0616cd	113	#include "e_os.h"
0c61e299 RL	114	#include "cryptlib.h"
	115	#include <openssl/rand.h>
	116	#include "rand_lcl.h"
	117
6a89a25c	118	#if !(defined(OPENSSL_SYS_WINDOWS) \|\| defined(OPENSSL_SYS_WIN32) \|\| defined(OPENSSL_SYS_VMS) \|\| defined(OPENSSL_SYS_OS2) \|\| defined(OPENSSL_SYS_VXWORKS))
0c61e299 RL	119
	120	#include <sys/types.h>
	121	#include <sys/time.h>
	122	#include <sys/times.h>
	123	#include <fcntl.h>
	124	#include <unistd.h>
4901b416	125	#include <time.h>
0c61e299 RL	126
	127	int RAND_poll(void)
	128	{
	129	unsigned long l;
	130	pid_t curr_pid = getpid();
599c0353	131	#if defined(DEVRANDOM) \|\| defined(DEVRANDOM_EGD)
0c61e299 RL	132	unsigned char tmpbuf[ENTROPY_NEEDED];
0c61e299 RL	133	int n = 0;
599c0353 LJ	134	#endif
599c0353 LJ	135	#ifdef DEVRANDOM
0c61e299 RL	136	static const char *randomfiles[] = { DEVRANDOM, NULL };
	137	const char **randomfile = NULL;
	138	int fd;
	139	#endif
599c0353 LJ	140	#ifdef DEVRANDOM_EGD
	141	static const char *egdsockets[] = { DEVRANDOM_EGD, NULL };
	142	const char **egdsocket = NULL;
	143	#endif
0c61e299 RL	144
	145	#ifdef DEVRANDOM
	146	/* Use a random entropy pool device. Linux, FreeBSD and OpenBSD
	147	* have this. Use /dev/urandom if you can as /dev/random may block
	148	* if it runs out of random entries. */
	149
	150	for (randomfile = randomfiles; *randomfile && n < ENTROPY_NEEDED; randomfile++)
	151	{
	152	if ((fd = open(*randomfile, O_RDONLY\|O_NONBLOCK
	153	#ifdef O_NOCTTY /* If it happens to be a TTY (god forbid), do not make it
	154	our controlling tty */
	155	\|O_NOCTTY
	156	#endif
	157	#ifdef O_NOFOLLOW /* Fail if the file is a symbolic link */
	158	\|O_NOFOLLOW
	159	#endif
	160	)) >= 0)
	161	{
	162	struct timeval t = { 0, 101000 }; / Spend 10ms on
	163	each file. */
	164	int r;
	165	fd_set fset;
	166
	167	do
	168	{
	169	FD_ZERO(&fset);
	170	FD_SET(fd, &fset);
	171	r = -1;
	172
	173	if (select(fd+1,&fset,NULL,NULL,&t) < 0)
	174	t.tv_usec=0;
	175	else if (FD_ISSET(fd, &fset))
	176	{
	177	r=read(fd,(unsigned char *)tmpbuf+n,
	178	ENTROPY_NEEDED-n);
	179	if (r > 0)
	180	n += r;
	181	}
	182
	183	/* Some Unixen will update t, some
	184	won't. For those who won't, give
	185	up here, otherwise, we will do
	186	this once again for the remaining
	187	time. */
	188	if (t.tv_usec == 10*1000)
	189	t.tv_usec=0;
	190	}
	191	while ((r > 0 \|\| (errno == EINTR \|\| errno == EAGAIN))
	192	&& t.tv_usec != 0 && n < ENTROPY_NEEDED);
	193
	194	close(fd);
0c61e299 RL	195	}
0c61e299 RL	196	}
599c0353 LJ	197	#endif
	198
	199	#ifdef DEVRANDOM_EGD
	200	/* Use an EGD socket to read entropy from an EGD or PRNGD entropy
	201	* collecting daemon. */
	202
	203	for (egdsocket = egdsockets; *egdsocket && n < ENTROPY_NEEDED; egdsocket++)
	204	{
	205	int r;
	206
	207	r = RAND_query_egd_bytes(egdsocket, (unsigned char )tmpbuf+n,
	208	ENTROPY_NEEDED-n);
	209	if (r > 0)
	210	n += r;
	211	}
	212	#endif
	213
	214	#if defined(DEVRANDOM) \|\| defined(DEVRANDOM_EGD)
28e5428d LJ	215	if (n > 0)
	216	{
	217	RAND_add(tmpbuf,sizeof tmpbuf,n);
	218	memset(tmpbuf,0,n);
	219	}
0c61e299 RL	220	#endif
	221
	222	/* put in some default random data, we need more than just this */
	223	l=curr_pid;
	224	RAND_add(&l,sizeof(l),0);
	225	l=getuid();
	226	RAND_add(&l,sizeof(l),0);
	227
	228	l=time(NULL);
	229	RAND_add(&l,sizeof(l),0);
	230
599c0353	231	#if defined(DEVRANDOM) \|\| defined(DEVRANDOM_EGD)
0c61e299	232	return 1;
6e6d04e2	233	#else
0c61e299	234	return 0;
6e6d04e2	235	#endif
0c61e299 RL	236	}
	237
	238	#endif