upstream commit

add a fuzz_matches_original() function to the fuzzer to
 detect fuzz cases that are identical to the original data. Hacky
 implementation, but very useful when you need the fuzz to be different, e.g.
 when verifying signature

1 files changed, 9 insertions, 1 deletions

diff --git a/regress/unittests/test_helper/fuzz.c b/regress/unittests/test_helper/fuzz.c
index 93cff6969..06fb247ef 100644
--- a/regress/unittests/test_helper/fuzz.c
+++ b/regress/unittests/test_helper/fuzz.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: fuzz.c,v 1.6 2015/01/18 19:50:55 djm Exp $    */
+/*      $OpenBSD: fuzz.c,v 1.7 2015/01/18 19:52:44 djm Exp $    */
 /*
  * Copyright (c) 2011 Damien Miller <djm@mindrot.org>
  *
@@ -378,6 +378,14 @@ fuzz_next(struct fuzz *fuzz)
 }
 
 int
+fuzz_matches_original(struct fuzz *fuzz)
+{
+        if (fuzz_len(fuzz) != fuzz->slen)
+                return 0;
+        return memcmp(fuzz_ptr(fuzz), fuzz->seed, fuzz->slen) == 0;
+}
+
+int
 fuzz_done(struct fuzz *fuzz)
 {
         FUZZ_DBG(("fuzz = %p, strategies = 0x%lx", fuzz,