X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=sshrand.c;h=ead39a9bdad917ec144faddd1ee4df1ec2cd22fd;hb=f004bcca17a789356c32527a396b68b71a773db2;hp=85dfa0b6bfbdfe40812d408154759d37044ae0c0;hpb=33f485c1c3a0942192763f085292aa57d9c3de87;p=PuTTY.git

diff --git a/sshrand.c b/sshrand.c
index 85dfa0b6..ead39a9b 100644
--- a/sshrand.c
+++ b/sshrand.c
@@ -49,6 +49,10 @@ static struct RandPool pool;
 int random_active = 0;
 long next_noise_collection;
 
+#ifdef RANDOM_DIAGNOSTICS
+int random_diagnostics = 0;
+#endif
+
 static void random_stir(void)
 {
     word32 block[HASHINPUT / sizeof(word32)];
@@ -65,6 +69,30 @@ static void random_stir(void)
 
     noise_get_light(random_add_noise);
 
+#ifdef RANDOM_DIAGNOSTICS
+    {
+        int p, q;
+        printf("random stir starting\npool:\n");
+        for (p = 0; p < POOLSIZE; p += HASHSIZE) {
+            printf("   ");
+            for (q = 0; q < HASHSIZE; q += 4) {
+                printf(" %08x", *(word32 *)(pool.pool + p + q));            
+            }
+            printf("\n");
+        }
+        printf("incoming:\n   ");
+        for (q = 0; q < HASHSIZE; q += 4) {
+            printf(" %08x", *(word32 *)(pool.incoming + q));
+        }
+        printf("\nincomingb:\n   ");
+        for (q = 0; q < HASHINPUT; q += 4) {
+            printf(" %08x", *(word32 *)(pool.incomingb + q));
+        }
+        printf("\n");
+        random_diagnostics++;
+    }
+#endif
+
     SHATransform((word32 *) pool.incoming, (word32 *) pool.incomingb);
     pool.incomingpos = 0;
 
@@ -116,6 +144,29 @@ static void random_stir(void)
 	    for (k = 0; k < sizeof(digest) / sizeof(*digest); k++)
 		((word32 *) (pool.pool + j))[k] = digest[k];
 	}
+
+#ifdef RANDOM_DIAGNOSTICS
+        if (i == 0) {
+            int p, q;
+            printf("random stir midpoint\npool:\n");
+            for (p = 0; p < POOLSIZE; p += HASHSIZE) {
+                printf("   ");
+                for (q = 0; q < HASHSIZE; q += 4) {
+                    printf(" %08x", *(word32 *)(pool.pool + p + q));            
+                }
+                printf("\n");
+            }
+            printf("incoming:\n   ");
+            for (q = 0; q < HASHSIZE; q += 4) {
+                printf(" %08x", *(word32 *)(pool.incoming + q));
+            }
+            printf("\nincomingb:\n   ");
+            for (q = 0; q < HASHINPUT; q += 4) {
+                printf(" %08x", *(word32 *)(pool.incomingb + q));
+            }
+            printf("\n");
+        }
+#endif
     }
 
     /*
@@ -128,6 +179,30 @@ static void random_stir(void)
     pool.poolpos = sizeof(pool.incoming);
 
     pool.stir_pending = FALSE;
+
+#ifdef RANDOM_DIAGNOSTICS
+    {
+        int p, q;
+        printf("random stir done\npool:\n");
+        for (p = 0; p < POOLSIZE; p += HASHSIZE) {
+            printf("   ");
+            for (q = 0; q < HASHSIZE; q += 4) {
+                printf(" %08x", *(word32 *)(pool.pool + p + q));            
+            }
+            printf("\n");
+        }
+        printf("incoming:\n   ");
+        for (q = 0; q < HASHSIZE; q += 4) {
+            printf(" %08x", *(word32 *)(pool.incoming + q));
+        }
+        printf("\nincomingb:\n   ");
+        for (q = 0; q < HASHINPUT; q += 4) {
+            printf(" %08x", *(word32 *)(pool.incomingb + q));
+        }
+        printf("\n");
+        random_diagnostics--;
+    }
+#endif
 }
 
 void random_add_noise(void *noise, int length)
@@ -219,17 +294,17 @@ void random_ref(void)
 	next_noise_collection =
 	    schedule_timer(NOISE_REGULAR_INTERVAL, random_timer, &pool);
     }
-
     random_active++;
 }
 
 void random_unref(void)
 {
+    assert(random_active > 0);
+    if (random_active == 1) {
+        random_save_seed();
+        expire_timer_context(&pool);
+    }
     random_active--;
-    assert(random_active >= 0);
-    if (random_active) return;
-
-    expire_timer_context(&pool);
 }
 
 int random_byte(void)