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/* Fuzz testing for the nanopb core.
* This can be used with external fuzzers, e.g. radamsa.
* It performs most of the same checks as fuzztest, but does not feature data generation.
*/
#include <pb_decode.h>
#include <pb_encode.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <time.h>
#include <malloc_wrappers.h>
#include "alltypes_static.pb.h"
#include "alltypes_pointer.pb.h"
#define BUFSIZE 4096
static bool do_static_decode(uint8_t *buffer, size_t msglen, bool assert_success)
{
pb_istream_t stream;
bool status;
alltypes_static_AllTypes *msg = malloc_with_check(sizeof(alltypes_static_AllTypes));
stream = pb_istream_from_buffer(buffer, msglen);
status = pb_decode(&stream, alltypes_static_AllTypes_fields, msg);
if (!status && assert_success)
{
/* Anything that was successfully encoded, should be decodeable.
* One exception: strings without null terminator are encoded up
* to end of buffer, but refused on decode because the terminator
* would not fit. */
if (strcmp(stream.errmsg, "string overflow") != 0)
assert(status);
}
free_with_check(msg);
return status;
}
static bool do_pointer_decode(uint8_t *buffer, size_t msglen, bool assert_success)
{
pb_istream_t stream;
bool status;
alltypes_pointer_AllTypes *msg;
msg = malloc_with_check(sizeof(alltypes_pointer_AllTypes));
memset(msg, 0, sizeof(alltypes_pointer_AllTypes));
stream = pb_istream_from_buffer(buffer, msglen);
assert(get_alloc_count() == 0);
status = pb_decode(&stream, alltypes_pointer_AllTypes_fields, msg);
if (assert_success)
assert(status);
pb_release(alltypes_pointer_AllTypes_fields, msg);
assert(get_alloc_count() == 0);
free_with_check(msg);
return status;
}
/* Do a decode -> encode -> decode -> encode roundtrip */
static void do_static_roundtrip(uint8_t *buffer, size_t msglen)
{
bool status;
uint8_t *buf2 = malloc_with_check(BUFSIZE);
uint8_t *buf3 = malloc_with_check(BUFSIZE);
size_t msglen2, msglen3;
alltypes_static_AllTypes *msg1 = malloc_with_check(sizeof(alltypes_static_AllTypes));
alltypes_static_AllTypes *msg2 = malloc_with_check(sizeof(alltypes_static_AllTypes));
memset(msg1, 0, sizeof(alltypes_static_AllTypes));
memset(msg2, 0, sizeof(alltypes_static_AllTypes));
{
pb_istream_t stream = pb_istream_from_buffer(buffer, msglen);
status = pb_decode(&stream, alltypes_static_AllTypes_fields, msg1);
assert(status);
}
{
pb_ostream_t stream = pb_ostream_from_buffer(buf2, BUFSIZE);
status = pb_encode(&stream, alltypes_static_AllTypes_fields, msg1);
assert(status);
msglen2 = stream.bytes_written;
}
{
pb_istream_t stream = pb_istream_from_buffer(buf2, msglen2);
status = pb_decode(&stream, alltypes_static_AllTypes_fields, msg2);
assert(status);
}
{
pb_ostream_t stream = pb_ostream_from_buffer(buf3, BUFSIZE);
status = pb_encode(&stream, alltypes_static_AllTypes_fields, msg2);
assert(status);
msglen3 = stream.bytes_written;
}
assert(msglen2 == msglen3);
assert(memcmp(buf2, buf3, msglen2) == 0);
free_with_check(msg1);
free_with_check(msg2);
free_with_check(buf2);
free_with_check(buf3);
}
/* Do decode -> encode -> decode -> encode roundtrip */
static void do_pointer_roundtrip(uint8_t *buffer, size_t msglen)
{
bool status;
uint8_t *buf2 = malloc_with_check(BUFSIZE);
uint8_t *buf3 = malloc_with_check(BUFSIZE);
size_t msglen2, msglen3;
alltypes_pointer_AllTypes *msg1 = malloc_with_check(sizeof(alltypes_pointer_AllTypes));
alltypes_pointer_AllTypes *msg2 = malloc_with_check(sizeof(alltypes_pointer_AllTypes));
memset(msg1, 0, sizeof(alltypes_pointer_AllTypes));
memset(msg2, 0, sizeof(alltypes_pointer_AllTypes));
{
pb_istream_t stream = pb_istream_from_buffer(buffer, msglen);
status = pb_decode(&stream, alltypes_pointer_AllTypes_fields, msg1);
assert(status);
}
{
pb_ostream_t stream = pb_ostream_from_buffer(buf2, BUFSIZE);
status = pb_encode(&stream, alltypes_pointer_AllTypes_fields, msg1);
assert(status);
msglen2 = stream.bytes_written;
}
{
pb_istream_t stream = pb_istream_from_buffer(buf2, msglen2);
status = pb_decode(&stream, alltypes_pointer_AllTypes_fields, msg2);
assert(status);
}
{
pb_ostream_t stream = pb_ostream_from_buffer(buf3, BUFSIZE);
status = pb_encode(&stream, alltypes_pointer_AllTypes_fields, msg2);
assert(status);
msglen3 = stream.bytes_written;
}
assert(msglen2 == msglen3);
assert(memcmp(buf2, buf3, msglen2) == 0);
pb_release(alltypes_pointer_AllTypes_fields, msg1);
pb_release(alltypes_pointer_AllTypes_fields, msg2);
free_with_check(msg1);
free_with_check(msg2);
free_with_check(buf2);
free_with_check(buf3);
}
static void run_iteration()
{
uint8_t *buffer = malloc_with_check(BUFSIZE);
size_t msglen;
bool status;
msglen = fread(buffer, BUFSIZE, 1, stdin);
status = do_static_decode(buffer, msglen, false);
if (status)
do_static_roundtrip(buffer, msglen);
status = do_pointer_decode(buffer, msglen, false);
if (status)
do_pointer_roundtrip(buffer, msglen);
free_with_check(buffer);
}
int main(int argc, char **argv)
{
run_iteration();
return 0;
}
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