diff options
Diffstat (limited to 'openssl/crypto/rand/rand_unix.c')
| -rw-r--r-- | openssl/crypto/rand/rand_unix.c | 622 |
1 files changed, 319 insertions, 303 deletions
diff --git a/openssl/crypto/rand/rand_unix.c b/openssl/crypto/rand/rand_unix.c index e3a65571c..266111edd 100644 --- a/openssl/crypto/rand/rand_unix.c +++ b/openssl/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 |