diff options
author | marha <marha@users.sourceforge.net> | 2012-01-27 20:31:28 +0100 |
---|---|---|
committer | marha <marha@users.sourceforge.net> | 2012-01-27 20:31:28 +0100 |
commit | c6a1477b0092762299491d79b3a8cb094c6456da (patch) | |
tree | 8458d152a6d4cecd8b2d88f3e7e6950128a53fb7 /openssl/crypto/rand | |
parent | eb4c088eb71f93b9639f4ff651523d794f1433f7 (diff) | |
download | vcxsrv-c6a1477b0092762299491d79b3a8cb094c6456da.tar.gz vcxsrv-c6a1477b0092762299491d79b3a8cb094c6456da.tar.bz2 vcxsrv-c6a1477b0092762299491d79b3a8cb094c6456da.zip |
update to openssl 1.0.0g
Diffstat (limited to 'openssl/crypto/rand')
-rw-r--r-- | openssl/crypto/rand/rand_unix.c | 108 | ||||
-rw-r--r-- | openssl/crypto/rand/randfile.c | 2 |
2 files changed, 75 insertions, 35 deletions
diff --git a/openssl/crypto/rand/rand_unix.c b/openssl/crypto/rand/rand_unix.c index e9ead3a52..e3a65571c 100644 --- a/openssl/crypto/rand/rand_unix.c +++ b/openssl/crypto/rand/rand_unix.c @@ -133,47 +133,87 @@ # define FD_SETSIZE (8*sizeof(fd_set)) #endif -#ifdef __VOS__ +#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) { - unsigned char buf[ENTROPY_NEEDED]; + short int code; + gid_t curr_gid; pid_t curr_pid; uid_t curr_uid; - static int first=1; - int i; - long rnd = 0; + int i, k; struct timespec ts; - unsigned seed; - -/* The VOS random() function starts from a static seed so its - initial value is predictable. If random() returns the - initial value, reseed it with dynamic data. The VOS - real-time clock has a granularity of 1 nsec so it should be - reasonably difficult to predict its exact value. Do not - gratuitously reseed the PRNG because other code in this - process or thread may be using it. */ - - if (first) { - first = 0; - rnd = random (); - if (rnd == 1804289383) { - clock_gettime (CLOCK_REALTIME, &ts); - curr_pid = getpid(); - curr_uid = getuid(); - seed = ts.tv_sec ^ ts.tv_nsec ^ curr_pid ^ curr_uid; - srandom (seed); - } - } + unsigned char v; - for (i = 0; i < sizeof(buf); i++) { - if (i % 4 == 0) - rnd = random(); - buf[i] = rnd; - rnd >>= 8; - } - RAND_add(buf, sizeof(buf), ENTROPY_NEEDED); - memset(buf, 0, sizeof(buf)); +#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__ diff --git a/openssl/crypto/rand/randfile.c b/openssl/crypto/rand/randfile.c index bc7d9c580..030e07f41 100644 --- a/openssl/crypto/rand/randfile.c +++ b/openssl/crypto/rand/randfile.c @@ -137,7 +137,7 @@ int RAND_load_file(const char *file, long bytes) in=fopen(file,"rb"); #endif if (in == NULL) goto err; -#if defined(S_IFBLK) && defined(S_IFCHR) && !defined(OPNESSL_NO_POSIX_IO) +#if defined(S_IFBLK) && defined(S_IFCHR) && !defined(OPENSSL_NO_POSIX_IO) if (sb.st_mode & (S_IFBLK | S_IFCHR)) { /* this file is a device. we don't want read an infinite number * of bytes from a random device, nor do we want to use buffered |