Add some conditionally-compilable diagnostics to the RNG. I got

[u/mdw/putty] / sshrand.c

diff --git a/sshrand.c b/sshrand.c
index 797fce7..c26fc75 100644 (file)
--- 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)