X-Git-Url: https://git.distorted.org.uk/~mdw/catacomb/blobdiff_plain/863b38d1b9406e9d38628d34b04f3f9fcd879e1f..a90d420cbe87490c844ae422c966e746d3134b07:/rand/rand.c

diff --git a/rand/rand.c b/rand/rand.c
index c2540f7e..304c68dc 100644
--- a/rand/rand.c
+++ b/rand/rand.c
@@ -251,9 +251,7 @@ void rand_add(rand_pool *r, const void *p, size_t sz, unsigned goodbits)
   const octet *c = p;
   int i, rot;
 
-#if RAND_POOLSZ != 128
-#  error Polynomial in rand_add is out of date.  Fix it.
-#endif
+  STATIC_ASSERT(RAND_POOLSZ == 128, "Polynomial doesn't match pool size");
 
   RAND_RESOLVE(r);
 
@@ -306,6 +304,8 @@ void rand_gate(rand_pool *r)
   HASH_CTX hc;
   CIPHER_CTX cc;
 
+  STATIC_ASSERT(CIPHER_KEYSZ <= HASH_SZ, "rand cipher keysize too long");
+
   RAND_RESOLVE(r);
   QUICK(r);
 
@@ -313,6 +313,7 @@ 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);
@@ -320,7 +321,6 @@ void rand_gate(rand_pool *r)
 
   /* --- Now mangle all of the data based on the hash --- */
 
-  assert(CIPHER_KEYSZ <= HASH_SZ);
   CIPHER_INIT(&cc, h, CIPHER_KEYSZ, 0);
   CIPHER_ENCRYPT(&cc, r->pool, r->pool, RAND_POOLSZ);
   CIPHER_ENCRYPT(&cc, r->buf, r->buf, RAND_BUFSZ);
@@ -356,6 +356,8 @@ void rand_stretch(rand_pool *r)
   HASH_CTX hc;
   CIPHER_CTX cc;
 
+  STATIC_ASSERT(CIPHER_KEYSZ <= HASH_SZ, "rand cipher keysize too long");
+
   RAND_RESOLVE(r);
   QUICK(r);
 
@@ -363,6 +365,7 @@ 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);
@@ -370,7 +373,6 @@ void rand_stretch(rand_pool *r)
 
   /* --- Now mangle the buffer based on the hash --- */
 
-  assert(CIPHER_KEYSZ <= HASH_SZ);
   CIPHER_INIT(&cc, h, CIPHER_KEYSZ, 0);
   CIPHER_ENCRYPT(&cc, r->buf, r->buf, RAND_BUFSZ);
   BURN(cc);