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surgical_havoc_mutate() in custom mutator helpers

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This commit is contained in:
Andrea Fioraldi
2020-03-23 10:47:17 +01:00
parent ee9447de01
commit f32d1022bd
4 changed files with 279 additions and 6 deletions
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15
examples/custom_mutators/example.c
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@ -5,6 +5,9 @@
Shengtuo Hu <h1994st@gmail.com>
*/
// You need to use -I /path/to/AFLplusplus/include
#include "custom_mutator_helpers.h"
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
@ -21,7 +24,7 @@ static size_t data_size = 100;
void afl_custom_init(unsigned int seed) {
srand(seed);
srand(seed); // needed also by surgical_havoc_mutate()
}
@ -54,10 +57,12 @@ size_t afl_custom_fuzz(uint8_t **buf, size_t buf_size, uint8_t *add_buf,
memcpy(mutated_out, commands[rand() % 3], 3);
// Mutate the payload of the packet
for (int i = 3; i < mutated_size; i++) {
mutated_out[i] = (mutated_out[i] + rand() % 10) & 0xff;
int i;
for (i = 0; i < 8; ++i) {
// Randomly perform one of the (no len modification) havoc mutations
surgical_havoc_mutate(mutated_out, 3, mutated_size);
}
return mutated_size;