aboutsummaryrefslogtreecommitdiffstats
path: root/crypto/rand/rand_unix.c
diff options
context:
space:
mode:
Diffstat (limited to 'crypto/rand/rand_unix.c')
-rw-r--r--crypto/rand/rand_unix.c622
1 files changed, 319 insertions, 303 deletions
diff --git a/crypto/rand/rand_unix.c b/crypto/rand/rand_unix.c
index e3a65571c8df..266111edda8c 100644
--- a/crypto/rand/rand_unix.c
+++ b/crypto/rand/rand_unix.c
@@ -5,21 +5,21 @@
* 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:
@@ -34,10 +34,10 @@
* 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
+ * 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
@@ -49,7 +49,7 @@
* 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
@@ -63,7 +63,7 @@
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * 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
@@ -118,314 +118,330 @@
#if !(defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_NETWARE))
-#include <sys/types.h>
-#include <sys/time.h>
-#include <sys/times.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <time.h>
-#if defined(OPENSSL_SYS_LINUX) /* should actually be available virtually everywhere */
-# include <poll.h>
-#endif
-#include <limits.h>
-#ifndef FD_SETSIZE
-# define FD_SETSIZE (8*sizeof(fd_set))
-#endif
-
-#if defined(OPENSSL_SYS_VOS)
-
-/* The following algorithm repeatedly samples the real-time clock
- (RTC) to generate a sequence of unpredictable data. The algorithm
- relies upon the uneven execution speed of the code (due to factors
- such as cache misses, interrupts, bus activity, and scheduling) and
- upon the rather large relative difference between the speed of the
- clock and the rate at which it can be read.
-
- If this code is ported to an environment where execution speed is
- more constant or where the RTC ticks at a much slower rate, or the
- clock can be read with fewer instructions, it is likely that the
- results would be far more predictable.
-
- As a precaution, we generate 4 times the minimum required amount of
- seed data. */
+# include <sys/types.h>
+# include <sys/time.h>
+# include <sys/times.h>
+# include <sys/stat.h>
+# include <fcntl.h>
+# include <unistd.h>
+# include <time.h>
+# if defined(OPENSSL_SYS_LINUX) /* should actually be available virtually
+ * everywhere */
+# include <poll.h>
+# endif
+# include <limits.h>
+# ifndef FD_SETSIZE
+# define FD_SETSIZE (8*sizeof(fd_set))
+# endif
+
+# if defined(OPENSSL_SYS_VOS)
+
+/*
+ * The following algorithm repeatedly samples the real-time clock (RTC) to
+ * generate a sequence of unpredictable data. The algorithm relies upon the
+ * uneven execution speed of the code (due to factors such as cache misses,
+ * interrupts, bus activity, and scheduling) and upon the rather large
+ * relative difference between the speed of the clock and the rate at which
+ * it can be read.
+ *
+ * If this code is ported to an environment where execution speed is more
+ * constant or where the RTC ticks at a much slower rate, or the clock can be
+ * read with fewer instructions, it is likely that the results would be far
+ * more predictable.
+ *
+ * As a precaution, we generate 4 times the minimum required amount of seed
+ * data.
+ */
int RAND_poll(void)
{
- short int code;
- gid_t curr_gid;
- pid_t curr_pid;
- uid_t curr_uid;
- int i, k;
- struct timespec ts;
- unsigned char v;
-
-#ifdef OPENSSL_SYS_VOS_HPPA
- long duration;
- extern void s$sleep (long *_duration, short int *_code);
-#else
-#ifdef OPENSSL_SYS_VOS_IA32
- long long duration;
- extern void s$sleep2 (long long *_duration, short int *_code);
-#else
-#error "Unsupported Platform."
-#endif /* OPENSSL_SYS_VOS_IA32 */
-#endif /* OPENSSL_SYS_VOS_HPPA */
-
- /* Seed with the gid, pid, and uid, to ensure *some*
- variation between different processes. */
-
- curr_gid = getgid();
- RAND_add (&curr_gid, sizeof curr_gid, 1);
- curr_gid = 0;
-
- curr_pid = getpid();
- RAND_add (&curr_pid, sizeof curr_pid, 1);
- curr_pid = 0;
-
- curr_uid = getuid();
- RAND_add (&curr_uid, sizeof curr_uid, 1);
- curr_uid = 0;
-
- for (i=0; i<(ENTROPY_NEEDED*4); i++)
- {
- /* burn some cpu; hope for interrupts, cache
- collisions, bus interference, etc. */
- for (k=0; k<99; k++)
- ts.tv_nsec = random ();
-
-#ifdef OPENSSL_SYS_VOS_HPPA
- /* sleep for 1/1024 of a second (976 us). */
- duration = 1;
- s$sleep (&duration, &code);
-#else
-#ifdef OPENSSL_SYS_VOS_IA32
- /* sleep for 1/65536 of a second (15 us). */
- duration = 1;
- s$sleep2 (&duration, &code);
-#endif /* OPENSSL_SYS_VOS_IA32 */
-#endif /* OPENSSL_SYS_VOS_HPPA */
-
- /* get wall clock time. */
- clock_gettime (CLOCK_REALTIME, &ts);
-
- /* take 8 bits */
- v = (unsigned char) (ts.tv_nsec % 256);
- RAND_add (&v, sizeof v, 1);
- v = 0;
- }
- return 1;
+ short int code;
+ gid_t curr_gid;
+ pid_t curr_pid;
+ uid_t curr_uid;
+ int i, k;
+ struct timespec ts;
+ unsigned char v;
+
+# ifdef OPENSSL_SYS_VOS_HPPA
+ long duration;
+ extern void s$sleep(long *_duration, short int *_code);
+# else
+# ifdef OPENSSL_SYS_VOS_IA32
+ long long duration;
+ extern void s$sleep2(long long *_duration, short int *_code);
+# else
+# error "Unsupported Platform."
+# endif /* OPENSSL_SYS_VOS_IA32 */
+# endif /* OPENSSL_SYS_VOS_HPPA */
+
+ /*
+ * Seed with the gid, pid, and uid, to ensure *some* variation between
+ * different processes.
+ */
+
+ curr_gid = getgid();
+ RAND_add(&curr_gid, sizeof curr_gid, 1);
+ curr_gid = 0;
+
+ curr_pid = getpid();
+ RAND_add(&curr_pid, sizeof curr_pid, 1);
+ curr_pid = 0;
+
+ curr_uid = getuid();
+ RAND_add(&curr_uid, sizeof curr_uid, 1);
+ curr_uid = 0;
+
+ for (i = 0; i < (ENTROPY_NEEDED * 4); i++) {
+ /*
+ * burn some cpu; hope for interrupts, cache collisions, bus
+ * interference, etc.
+ */
+ for (k = 0; k < 99; k++)
+ ts.tv_nsec = random();
+
+# ifdef OPENSSL_SYS_VOS_HPPA
+ /* sleep for 1/1024 of a second (976 us). */
+ duration = 1;
+ s$sleep(&duration, &code);
+# else
+# ifdef OPENSSL_SYS_VOS_IA32
+ /* sleep for 1/65536 of a second (15 us). */
+ duration = 1;
+ s$sleep2(&duration, &code);
+# endif /* OPENSSL_SYS_VOS_IA32 */
+# endif /* OPENSSL_SYS_VOS_HPPA */
+
+ /* get wall clock time. */
+ clock_gettime(CLOCK_REALTIME, &ts);
+
+ /* take 8 bits */
+ v = (unsigned char)(ts.tv_nsec % 256);
+ RAND_add(&v, sizeof v, 1);
+ v = 0;
+ }
+ return 1;
}
-#elif defined __OpenBSD__
+# elif defined __OpenBSD__
int RAND_poll(void)
{
- u_int32_t rnd = 0, i;
- unsigned char buf[ENTROPY_NEEDED];
-
- for (i = 0; i < sizeof(buf); i++) {
- if (i % 4 == 0)
- rnd = arc4random();
- buf[i] = rnd;
- rnd >>= 8;
- }
- RAND_add(buf, sizeof(buf), ENTROPY_NEEDED);
- memset(buf, 0, sizeof(buf));
-
- return 1;
+ u_int32_t rnd = 0, i;
+ unsigned char buf[ENTROPY_NEEDED];
+
+ for (i = 0; i < sizeof(buf); i++) {
+ if (i % 4 == 0)
+ rnd = arc4random();
+ buf[i] = rnd;
+ rnd >>= 8;
+ }
+ RAND_add(buf, sizeof(buf), ENTROPY_NEEDED);
+ memset(buf, 0, sizeof(buf));
+
+ return 1;
}
-#else /* !defined(__OpenBSD__) */
+# else /* !defined(__OpenBSD__) */
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 };
- struct stat randomstats[sizeof(randomfiles)/sizeof(randomfiles[0])];
- int fd;
- unsigned int i;
-#endif
-#ifdef DEVRANDOM_EGD
- static const char *egdsockets[] = { DEVRANDOM_EGD, NULL };
- const char **egdsocket = NULL;
-#endif
-
-#ifdef DEVRANDOM
- memset(randomstats,0,sizeof(randomstats));
- /* 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 (i = 0; (i < sizeof(randomfiles)/sizeof(randomfiles[0])) &&
- (n < ENTROPY_NEEDED); i++)
- {
- if ((fd = open(randomfiles[i], O_RDONLY
-#ifdef O_NONBLOCK
- |O_NONBLOCK
-#endif
-#ifdef O_BINARY
- |O_BINARY
-#endif
-#ifdef O_NOCTTY /* If it happens to be a TTY (god forbid), do not make it
- our controlling tty */
- |O_NOCTTY
-#endif
- )) >= 0)
- {
- int usec = 10*1000; /* spend 10ms on each file */
- int r;
- unsigned int j;
- struct stat *st=&randomstats[i];
-
- /* Avoid using same input... Used to be O_NOFOLLOW
- * above, but it's not universally appropriate... */
- if (fstat(fd,st) != 0) { close(fd); continue; }
- for (j=0;j<i;j++)
- {
- if (randomstats[j].st_ino==st->st_ino &&
- randomstats[j].st_dev==st->st_dev)
- break;
- }
- if (j<i) { close(fd); continue; }
-
- do
- {
- int try_read = 0;
-
-#if defined(OPENSSL_SYS_BEOS_R5)
- /* select() is broken in BeOS R5, so we simply
- * try to read something and snooze if we couldn't */
- try_read = 1;
-
-#elif defined(OPENSSL_SYS_LINUX)
- /* use poll() */
- struct pollfd pset;
-
- pset.fd = fd;
- pset.events = POLLIN;
- pset.revents = 0;
-
- if (poll(&pset, 1, usec / 1000) < 0)
- usec = 0;
- else
- try_read = (pset.revents & POLLIN) != 0;
-
-#else
- /* use select() */
- fd_set fset;
- struct timeval t;
-
- t.tv_sec = 0;
- t.tv_usec = usec;
-
- if (FD_SETSIZE > 0 && (unsigned)fd >= FD_SETSIZE)
- {
- /* can't use select, so just try to read once anyway */
- try_read = 1;
- }
- else
- {
- FD_ZERO(&fset);
- FD_SET(fd, &fset);
-
- if (select(fd+1,&fset,NULL,NULL,&t) >= 0)
- {
- usec = t.tv_usec;
- if (FD_ISSET(fd, &fset))
- try_read = 1;
- }
- else
- usec = 0;
- }
-#endif
-
- if (try_read)
- {
- r = read(fd,(unsigned char *)tmpbuf+n, ENTROPY_NEEDED-n);
- if (r > 0)
- n += r;
-#if defined(OPENSSL_SYS_BEOS_R5)
- if (r == 0)
- snooze(t.tv_usec);
-#endif
- }
- else
- r = -1;
-
- /* Some Unixen will update t in select(), some
- won't. For those who won't, or if we
- didn't use select() in the first place,
- give up here, otherwise, we will do
- this once again for the remaining
- time. */
- if (usec == 10*1000)
- usec = 0;
- }
- while ((r > 0 ||
- (errno == EINTR || errno == EAGAIN)) && usec != 0 && n < ENTROPY_NEEDED);
-
- close(fd);
- }
- }
-#endif /* defined(DEVRANDOM) */
-
-#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 /* defined(DEVRANDOM_EGD) */
-
-#if defined(DEVRANDOM) || defined(DEVRANDOM_EGD)
- if (n > 0)
- {
- RAND_add(tmpbuf,sizeof tmpbuf,(double)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),0.0);
- l=getuid();
- RAND_add(&l,sizeof(l),0.0);
-
- l=time(NULL);
- RAND_add(&l,sizeof(l),0.0);
-
-#if defined(OPENSSL_SYS_BEOS)
- {
- system_info sysInfo;
- get_system_info(&sysInfo);
- RAND_add(&sysInfo,sizeof(sysInfo),0);
- }
-#endif
-
-#if defined(DEVRANDOM) || defined(DEVRANDOM_EGD)
- return 1;
-#else
- return 0;
-#endif
+ 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 };
+ struct stat randomstats[sizeof(randomfiles) / sizeof(randomfiles[0])];
+ int fd;
+ unsigned int i;
+# endif
+# ifdef DEVRANDOM_EGD
+ static const char *egdsockets[] = { DEVRANDOM_EGD, NULL };
+ const char **egdsocket = NULL;
+# endif
+
+# ifdef DEVRANDOM
+ memset(randomstats, 0, sizeof(randomstats));
+ /*
+ * 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 (i = 0; (i < sizeof(randomfiles) / sizeof(randomfiles[0])) &&
+ (n < ENTROPY_NEEDED); i++) {
+ if ((fd = open(randomfiles[i], O_RDONLY
+# ifdef O_NONBLOCK
+ | O_NONBLOCK
+# endif
+# ifdef O_BINARY
+ | O_BINARY
+# endif
+# ifdef O_NOCTTY /* If it happens to be a TTY (god forbid), do
+ * not make it our controlling tty */
+ | O_NOCTTY
+# endif
+ )) >= 0) {
+ int usec = 10 * 1000; /* spend 10ms on each file */
+ int r;
+ unsigned int j;
+ struct stat *st = &randomstats[i];
+
+ /*
+ * Avoid using same input... Used to be O_NOFOLLOW above, but
+ * it's not universally appropriate...
+ */
+ if (fstat(fd, st) != 0) {
+ close(fd);
+ continue;
+ }
+ for (j = 0; j < i; j++) {
+ if (randomstats[j].st_ino == st->st_ino &&
+ randomstats[j].st_dev == st->st_dev)
+ break;
+ }
+ if (j < i) {
+ close(fd);
+ continue;
+ }
+
+ do {
+ int try_read = 0;
+
+# if defined(OPENSSL_SYS_BEOS_R5)
+ /*
+ * select() is broken in BeOS R5, so we simply try to read
+ * something and snooze if we couldn't
+ */
+ try_read = 1;
+
+# elif defined(OPENSSL_SYS_LINUX)
+ /* use poll() */
+ struct pollfd pset;
+
+ pset.fd = fd;
+ pset.events = POLLIN;
+ pset.revents = 0;
+
+ if (poll(&pset, 1, usec / 1000) < 0)
+ usec = 0;
+ else
+ try_read = (pset.revents & POLLIN) != 0;
+
+# else
+ /* use select() */
+ fd_set fset;
+ struct timeval t;
+
+ t.tv_sec = 0;
+ t.tv_usec = usec;
+
+ if (FD_SETSIZE > 0 && (unsigned)fd >= FD_SETSIZE) {
+ /*
+ * can't use select, so just try to read once anyway
+ */
+ try_read = 1;
+ } else {
+ FD_ZERO(&fset);
+ FD_SET(fd, &fset);
+
+ if (select(fd + 1, &fset, NULL, NULL, &t) >= 0) {
+ usec = t.tv_usec;
+ if (FD_ISSET(fd, &fset))
+ try_read = 1;
+ } else
+ usec = 0;
+ }
+# endif
+
+ if (try_read) {
+ r = read(fd, (unsigned char *)tmpbuf + n,
+ ENTROPY_NEEDED - n);
+ if (r > 0)
+ n += r;
+# if defined(OPENSSL_SYS_BEOS_R5)
+ if (r == 0)
+ snooze(t.tv_usec);
+# endif
+ } else
+ r = -1;
+
+ /*
+ * Some Unixen will update t in select(), some won't. For
+ * those who won't, or if we didn't use select() in the first
+ * place, give up here, otherwise, we will do this once again
+ * for the remaining time.
+ */
+ if (usec == 10 * 1000)
+ usec = 0;
+ }
+ while ((r > 0 ||
+ (errno == EINTR || errno == EAGAIN)) && usec != 0
+ && n < ENTROPY_NEEDED);
+
+ close(fd);
+ }
+ }
+# endif /* defined(DEVRANDOM) */
+
+# 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 /* defined(DEVRANDOM_EGD) */
+
+# if defined(DEVRANDOM) || defined(DEVRANDOM_EGD)
+ if (n > 0) {
+ RAND_add(tmpbuf, sizeof tmpbuf, (double)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), 0.0);
+ l = getuid();
+ RAND_add(&l, sizeof(l), 0.0);
+
+ l = time(NULL);
+ RAND_add(&l, sizeof(l), 0.0);
+
+# if defined(OPENSSL_SYS_BEOS)
+ {
+ system_info sysInfo;
+ get_system_info(&sysInfo);
+ RAND_add(&sysInfo, sizeof(sysInfo), 0);
+ }
+# endif
+
+# if defined(DEVRANDOM) || defined(DEVRANDOM_EGD)
+ return 1;
+# else
+ return 0;
+# endif
}
-#endif /* defined(__OpenBSD__) */
-#endif /* !(defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_NETWARE)) */
-
+# endif /* defined(__OpenBSD__) */
+#endif /* !(defined(OPENSSL_SYS_WINDOWS) ||
+ * defined(OPENSSL_SYS_WIN32) ||
+ * defined(OPENSSL_SYS_VMS) ||
+ * defined(OPENSSL_SYS_OS2) ||
+ * defined(OPENSSL_SYS_VXWORKS) ||
+ * defined(OPENSSL_SYS_NETWARE)) */
#if defined(OPENSSL_SYS_VXWORKS)
int RAND_poll(void)
- {
- return 0;
- }
+{
+ return 0;
+}
#endif