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authorJung-uk Kim <jkim@FreeBSD.org>2012-07-11 23:31:36 +0000
committerJung-uk Kim <jkim@FreeBSD.org>2012-07-11 23:31:36 +0000
commit0758ab5ea778e4ba36d2150af1bba602a48d6467 (patch)
tree0c30591ac90cb5e07a0763793709fd1056b67f57 /crypto/rand/rand_unix.c
parent2b8b5455829304396e38200c205612c4dc57c052 (diff)
downloadsrc-0758ab5ea778e4ba36d2150af1bba602a48d6467.tar.gz
src-0758ab5ea778e4ba36d2150af1bba602a48d6467.zip
Import OpenSSL 1.0.1c.vendor/openssl/1.0.1c
Approved by: benl (maintainer)
Notes
Notes: svn path=/vendor-crypto/openssl/dist/; revision=238384 svn path=/vendor-crypto/openssl/1.0.1c/; revision=238385; tag=vendor/openssl/1.0.1c
Diffstat (limited to 'crypto/rand/rand_unix.c')
-rw-r--r--crypto/rand/rand_unix.c111
1 files changed, 106 insertions, 5 deletions
diff --git a/crypto/rand/rand_unix.c b/crypto/rand/rand_unix.c
index 71b98ec2121d..e3a65571c8df 100644
--- a/crypto/rand/rand_unix.c
+++ b/crypto/rand/rand_unix.c
@@ -133,7 +133,90 @@
# define FD_SETSIZE (8*sizeof(fd_set))
#endif
-#ifdef __OpenBSD__
+#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;
+}
+#elif defined __OpenBSD__
int RAND_poll(void)
{
u_int32_t rnd = 0, i;
@@ -163,7 +246,7 @@ int RAND_poll(void)
static const char *randomfiles[] = { DEVRANDOM };
struct stat randomstats[sizeof(randomfiles)/sizeof(randomfiles[0])];
int fd;
- size_t i;
+ unsigned int i;
#endif
#ifdef DEVRANDOM_EGD
static const char *egdsockets[] = { DEVRANDOM_EGD, NULL };
@@ -176,7 +259,8 @@ int RAND_poll(void)
* 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++)
+ for (i = 0; (i < sizeof(randomfiles)/sizeof(randomfiles[0])) &&
+ (n < ENTROPY_NEEDED); i++)
{
if ((fd = open(randomfiles[i], O_RDONLY
#ifdef O_NONBLOCK
@@ -193,7 +277,7 @@ int RAND_poll(void)
{
int usec = 10*1000; /* spend 10ms on each file */
int r;
- size_t j;
+ unsigned int j;
struct stat *st=&randomstats[i];
/* Avoid using same input... Used to be O_NOFOLLOW
@@ -211,7 +295,12 @@ int RAND_poll(void)
{
int try_read = 0;
-#if defined(OPENSSL_SYS_LINUX)
+#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;
@@ -258,6 +347,10 @@ int RAND_poll(void)
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;
@@ -311,6 +404,14 @@ int RAND_poll(void)
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