rand/rand.c (rand_gate): Evolve r->ibits in a more sensible manner.

[catacomb] / rand / rand.c

diff --git a/rand/rand.c b/rand/rand.c
index f9f16d5..01e6422 100644 (file)
--- a/rand/rand.c
+++ b/rand/rand.c
@@ -323,6 +323,7 @@ void rand_gate(rand_pool *r)
 
   HASH_INIT(&hc);
   STORE32(g, r->gen); HASH(&hc, g, sizeof(g));
+  HASH(&hc, r->k.k, RAND_KEYSZ);
   HASH(&hc, r->pool, RAND_POOLSZ);
   HASH(&hc, r->buf, RAND_BUFSZ);
   HASH_DONE(&hc, h);
@@ -341,7 +342,7 @@ void rand_gate(rand_pool *r)
   r->o = RAND_SECSZ;
   r->obits += r->ibits;
   if (r->obits > RAND_OBITS) {
-    r->ibits = r->obits - r->ibits;
+    r->ibits = r->obits - RAND_OBITS;
     r->obits = RAND_OBITS;
   } else
     r->ibits = 0;
@@ -373,6 +374,7 @@ void rand_stretch(rand_pool *r)
 
   HASH_INIT(&hc);
   STORE32(g, r->gen); HASH(&hc, g, sizeof(g));
+  HASH(&hc, r->k.k, RAND_KEYSZ);
   HASH(&hc, r->pool, RAND_POOLSZ);
   HASH(&hc, r->buf, RAND_BUFSZ);
   HASH_DONE(&hc, h);
@@ -480,11 +482,15 @@ void rand_getgood(rand_pool *r, void *p, size_t sz)
        chunk = r->obits / 8;
     }
 
-    if (chunk + r->o > RAND_BUFSZ)
+    if (chunk + r->o <= RAND_BUFSZ) {
+      memcpy(o, r->buf + r->o, chunk);
+      r->o += chunk;
+    } else {
       chunk = RAND_BUFSZ - r->o;
+      memcpy(o, r->buf + r->o, chunk);
+      rand_stretch(r);
+    }
 
-    memcpy(o, r->buf + r->o, chunk);
-    r->o += chunk;
     r->obits -= chunk * 8;
     o += chunk;
     sz -= chunk;