From 1b6e16ae7c9105e35dd14464b8ce785c613ab6e2 Mon Sep 17 00:00:00 2001 From: Matt Johnston Date: Sun, 1 Nov 2020 14:01:37 +0800 Subject: fuzzing - avoid sha1 for random seed every iteration --- dbrandom.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) (limited to 'dbrandom.c') diff --git a/dbrandom.c b/dbrandom.c index faada2a..7aaa42b 100644 --- a/dbrandom.c +++ b/dbrandom.c @@ -151,12 +151,17 @@ static void write_urandom() #if DROPBEAR_FUZZ void fuzz_seed(const unsigned char* dat, unsigned int len) { - hash_state hs; - sha1_init(&hs); - sha1_process(&hs, "fuzzfuzzfuzz", strlen("fuzzfuzzfuzz")); - sha1_process(&hs, dat, len); - sha1_done(&hs, hashpool); - + static unsigned char keep_pool[SHA1_HASH_SIZE]; + static int once = 0; + if (!once) { + once = 1; + hash_state hs; + sha1_init(&hs); + sha1_process(&hs, "fuzzfuzzfuzz", strlen("fuzzfuzzfuzz")); + sha1_process(&hs, dat, len); + sha1_done(&hs, keep_pool); + } + memcpy(hashpool, keep_pool, sizeof(keep_pool)); counter = 0; donerandinit = 1; } -- cgit v1.2.3