PR: 2632

[oweals/openssl.git] / crypto / rand / rand_unix.c

diff --git a/crypto/rand/rand_unix.c b/crypto/rand/rand_unix.c
index 550ad955f0c193ea1f56e2cc3d62cc35462058f6..e9ead3a529688fd2c49a95b6871240d24ac6d70d 100644 (file)
--- a/crypto/rand/rand_unix.c
+++ b/crypto/rand/rand_unix.c
@@ -133,7 +133,50 @@
 # define FD_SETSIZE (8*sizeof(fd_set))
 #endif
 
-#ifdef __OpenBSD__
+#ifdef __VOS__
+int RAND_poll(void)
+{
+       unsigned char buf[ENTROPY_NEEDED];
+       pid_t curr_pid;
+       uid_t curr_uid;
+       static int first=1;
+       int i;
+       long rnd = 0;
+       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);
+               }
+       }
+
+       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));
+
+       return 1;
+}
+#elif defined __OpenBSD__
 int RAND_poll(void)
 {
        u_int32_t rnd = 0, i;