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/* Copyright (c) 2016-2020, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#define CONSDIFF_PRIVATE
#include "orconfig.h"
#include "core/or/or.h"
#include "feature/dircommon/consdiff.h"
#include "test/fuzz/fuzzing.h"
static int
mock_consensus_compute_digest_(const char *c, size_t len,
consensus_digest_t *d)
{
(void)c;
(void)len;
memset(d->sha3_256, 3, sizeof(d->sha3_256));
return 0;
}
int
fuzz_init(void)
{
MOCK(consensus_compute_digest, mock_consensus_compute_digest_);
MOCK(consensus_compute_digest_as_signed, mock_consensus_compute_digest_);
return 0;
}
int
fuzz_cleanup(void)
{
UNMOCK(consensus_compute_digest);
UNMOCK(consensus_compute_digest_as_signed);
return 0;
}
int
fuzz_main(const uint8_t *stdin_buf, size_t data_size)
{
#define SEP "=====\n"
#define SEPLEN strlen(SEP)
const uint8_t *separator = tor_memmem(stdin_buf, data_size, SEP, SEPLEN);
if (! separator)
return 0;
size_t c1_len = separator - stdin_buf;
const char *c1 = (const char *)stdin_buf;
size_t c2_len = data_size - c1_len - SEPLEN;
const char *c2 = (const char *)separator + SEPLEN;
const char *cp = memchr(c1, 0, c1_len);
if (cp)
c1_len = cp - c1;
cp = memchr(c2, 0, c2_len);
if (cp)
c2_len = cp - c2;
char *c3 = consensus_diff_generate(c1, c1_len, c2, c2_len);
if (c3) {
char *c4 = consensus_diff_apply(c1, c1_len, c3, strlen(c3));
tor_assert(c4);
int equal = (c2_len == strlen(c4)) && fast_memeq(c2, c4, c2_len);
if (! equal) {
//printf("%s\n", escaped(c1));
//printf("%s\n", escaped(c2));
printf("%s\n", escaped(c3));
printf("%s\n", escaped(c4));
}
tor_assert(equal);
tor_free(c3);
tor_free(c4);
}
return 0;
}
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