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comparison packet.c @ 1408:27e65d3aed5f fuzz

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fix checkmac always failing pre-kex
author Matt Johnston <matt@ucc.asn.au>
date Sun, 11 Jun 2017 21:39:40 +0800
parents 08f4fa4dc6a0
children 5916af64acd4
comparison
equal deleted inserted replaced
1386:f0990c284663 1408:27e65d3aed5f
370 buf_setpos(ses.readbuf, 0); 370 buf_setpos(ses.readbuf, 0);
371 make_mac(ses.recvseq, &ses.keys->recv, ses.readbuf, contents_len, mac_bytes); 371 make_mac(ses.recvseq, &ses.keys->recv, ses.readbuf, contents_len, mac_bytes);
372 372
373 #ifdef DROPBEAR_FUZZ 373 #ifdef DROPBEAR_FUZZ
374 if (fuzz.fuzzing) { 374 if (fuzz.fuzzing) {
375 // fail 1 in 1000 times to test error path 375 // fail 1 in 2000 times to test error path.
376 // note that mac_bytes is all zero prior to kex, so don't test ==0 !
376 unsigned int value = *((unsigned int*)&mac_bytes); 377 unsigned int value = *((unsigned int*)&mac_bytes);
377 if (value % 1000 == 0) { 378 if (value % 2000 == 99) {
378 return DROPBEAR_FAILURE; 379 return DROPBEAR_FAILURE;
379 } 380 }
380 return DROPBEAR_SUCCESS; 381 return DROPBEAR_SUCCESS;
381 } 382 }
382 #endif 383 #endif