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- /* 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);
- OPENSSL_cleanse(tmpbuf,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
- #if defined(OPENSSL_SYS_VXWORKS)
- int RAND_poll(void)
- {
- return 0;
- }
- #endif
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