# HG changeset patch
# User Matt Johnston <matt@ucc.asn.au>
# Date 1603467164 -28800
# Node ID 517fb7b62438fa38fdc89c3305354efe388737a0
# Parent  d5680e12ac3309454b27dfee1d81af263d51ec87
Add some more variation to fuzzer random number generation

diff -r d5680e12ac33 -r 517fb7b62438 dbrandom.c
--- a/dbrandom.c	Fri Oct 23 23:10:20 2020 +0800
+++ b/dbrandom.c	Fri Oct 23 23:32:44 2020 +0800
@@ -150,10 +150,11 @@
 }
 
 #if DROPBEAR_FUZZ
-void fuzz_seed(void) {
+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);
 
 	counter = 0;
diff -r d5680e12ac33 -r 517fb7b62438 fuzz.h
--- a/fuzz.h	Fri Oct 23 23:10:20 2020 +0800
+++ b/fuzz.h	Fri Oct 23 23:32:44 2020 +0800
@@ -29,7 +29,7 @@
         const char* algo, unsigned int algolen,
         const unsigned char* keyblob, unsigned int keybloblen);
 extern const char * const * fuzz_signkey_names;
-void fuzz_seed(void);
+void fuzz_seed(const unsigned char* dat, unsigned int len);
 
 // helpers
 void fuzz_get_socket_address(int fd, char **local_host, char **local_port,
diff -r d5680e12ac33 -r 517fb7b62438 fuzz/fuzz-common.c
--- a/fuzz/fuzz-common.c	Fri Oct 23 23:10:20 2020 +0800
+++ b/fuzz/fuzz-common.c	Fri Oct 23 23:32:44 2020 +0800
@@ -25,7 +25,7 @@
     fuzz.input = m_malloc(sizeof(buffer));
     _dropbear_log = fuzz_dropbear_log;
     crypto_init();
-    fuzz_seed();
+    fuzz_seed("start", 5);
     /* let any messages get flushed */
     setlinebuf(stdout);
 }
@@ -42,7 +42,7 @@
     memset(&cli_ses, 0x0, sizeof(cli_ses));
     wrapfd_setup(fuzz.input);
 
-    fuzz_seed();
+    fuzz_seed(fuzz.input->data, MIN(fuzz.input->len, 16));
 
     return DROPBEAR_SUCCESS;
 }