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authorRomain Forlot <romain.forlot@iot.bzh>2017-06-20 10:24:05 +0000
committerRomain Forlot <romain.forlot@iot.bzh>2017-06-20 10:24:05 +0000
commit32e25cbca210a359b09768537b6f443fe90a3070 (patch)
tree3309794c15d8a8f8e9c1c08cad072ee1378813ba /CAN-binder/libs/nanopb/tests/fuzztest/fuzztest.c
parent76c43dec62b2e21cd6446360c00d4fe6b437533f (diff)
Separation Generator to a dedicated repo
Change-Id: Id94831651c3266861435272a6e36c7884bef2c45 Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>
Diffstat (limited to 'CAN-binder/libs/nanopb/tests/fuzztest/fuzztest.c')
-rw-r--r--CAN-binder/libs/nanopb/tests/fuzztest/fuzztest.c432
1 files changed, 0 insertions, 432 deletions
diff --git a/CAN-binder/libs/nanopb/tests/fuzztest/fuzztest.c b/CAN-binder/libs/nanopb/tests/fuzztest/fuzztest.c
deleted file mode 100644
index ee851ec0..00000000
--- a/CAN-binder/libs/nanopb/tests/fuzztest/fuzztest.c
+++ /dev/null
@@ -1,432 +0,0 @@
-/* Fuzz testing for the nanopb core.
- * Attempts to verify all the properties defined in the security model document.
- */
-
-#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"
-
-static uint64_t random_seed;
-
-/* Uses xorshift64 here instead of rand() for both speed and
- * reproducibility across platforms. */
-static uint32_t rand_word()
-{
- random_seed ^= random_seed >> 12;
- random_seed ^= random_seed << 25;
- random_seed ^= random_seed >> 27;
- return random_seed * 2685821657736338717ULL;
-}
-
-/* Get a random integer in range, with approximately flat distribution. */
-static int rand_int(int min, int max)
-{
- return rand_word() % (max + 1 - min) + min;
-}
-
-static bool rand_bool()
-{
- return rand_word() & 1;
-}
-
-/* Get a random byte, with skewed distribution.
- * Important corner cases like 0xFF, 0x00 and 0xFE occur more
- * often than other values. */
-static uint8_t rand_byte()
-{
- uint32_t w = rand_word();
- uint8_t b = w & 0xFF;
- if (w & 0x100000)
- b >>= (w >> 8) & 7;
- if (w & 0x200000)
- b <<= (w >> 12) & 7;
- if (w & 0x400000)
- b ^= 0xFF;
- return b;
-}
-
-/* Get a random length, with skewed distribution.
- * Favors the shorter lengths, but always atleast 1. */
-static size_t rand_len(size_t max)
-{
- uint32_t w = rand_word();
- size_t s;
- if (w & 0x800000)
- w &= 3;
- else if (w & 0x400000)
- w &= 15;
- else if (w & 0x200000)
- w &= 255;
-
- s = (w % max);
- if (s == 0)
- s = 1;
-
- return s;
-}
-
-/* Fills a buffer with random data with skewed distribution. */
-static void rand_fill(uint8_t *buf, size_t count)
-{
- while (count--)
- *buf++ = rand_byte();
-}
-
-/* Fill with random protobuf-like data */
-static size_t rand_fill_protobuf(uint8_t *buf, size_t min_bytes, size_t max_bytes, int min_tag)
-{
- pb_ostream_t stream = pb_ostream_from_buffer(buf, max_bytes);
-
- while(stream.bytes_written < min_bytes)
- {
- pb_wire_type_t wt = rand_int(0, 3);
- if (wt == 3) wt = 5; /* Gap in values */
-
- if (!pb_encode_tag(&stream, wt, rand_int(min_tag, min_tag + 512)))
- break;
-
- if (wt == PB_WT_VARINT)
- {
- uint64_t value;
- rand_fill((uint8_t*)&value, sizeof(value));
- pb_encode_varint(&stream, value);
- }
- else if (wt == PB_WT_64BIT)
- {
- uint64_t value;
- rand_fill((uint8_t*)&value, sizeof(value));
- pb_encode_fixed64(&stream, &value);
- }
- else if (wt == PB_WT_32BIT)
- {
- uint32_t value;
- rand_fill((uint8_t*)&value, sizeof(value));
- pb_encode_fixed32(&stream, &value);
- }
- else if (wt == PB_WT_STRING)
- {
- size_t len;
- uint8_t *buf;
-
- if (min_bytes > stream.bytes_written)
- len = rand_len(min_bytes - stream.bytes_written);
- else
- len = 0;
-
- buf = malloc(len);
- pb_encode_varint(&stream, len);
- rand_fill(buf, len);
- pb_write(&stream, buf, len);
- free(buf);
- }
- }
-
- return stream.bytes_written;
-}
-
-/* Given a buffer of data, mess it up a bit */
-static void rand_mess(uint8_t *buf, size_t count)
-{
- int m = rand_int(0, 3);
-
- if (m == 0)
- {
- /* Replace random substring */
- int s = rand_int(0, count - 1);
- int l = rand_len(count - s);
- rand_fill(buf + s, l);
- }
- else if (m == 1)
- {
- /* Swap random bytes */
- int a = rand_int(0, count - 1);
- int b = rand_int(0, count - 1);
- int x = buf[a];
- buf[a] = buf[b];
- buf[b] = x;
- }
- else if (m == 2)
- {
- /* Duplicate substring */
- int s = rand_int(0, count - 2);
- int l = rand_len((count - s) / 2);
- memcpy(buf + s + l, buf + s, l);
- }
- else if (m == 3)
- {
- /* Add random protobuf noise */
- int s = rand_int(0, count - 1);
- int l = rand_len(count - s);
- rand_fill_protobuf(buf + s, l, count - s, 1);
- }
-}
-
-/* Some default data to put in the message */
-static const alltypes_static_AllTypes initval = alltypes_static_AllTypes_init_default;
-
-#define BUFSIZE 4096
-
-static bool do_static_encode(uint8_t *buffer, size_t *msglen)
-{
- pb_ostream_t stream;
- bool status;
-
- /* Allocate a message and fill it with defaults */
- alltypes_static_AllTypes *msg = malloc_with_check(sizeof(alltypes_static_AllTypes));
- memcpy(msg, &initval, sizeof(initval));
-
- /* Apply randomness to the data before encoding */
- while (rand_int(0, 7))
- rand_mess((uint8_t*)msg, sizeof(alltypes_static_AllTypes));
-
- stream = pb_ostream_from_buffer(buffer, BUFSIZE);
- status = pb_encode(&stream, alltypes_static_AllTypes_fields, msg);
- assert(stream.bytes_written <= BUFSIZE);
- assert(stream.bytes_written <= alltypes_static_AllTypes_size);
-
- *msglen = stream.bytes_written;
- pb_release(alltypes_static_AllTypes_fields, msg);
- free_with_check(msg);
-
- return status;
-}
-
-/* Append or prepend protobuf noise */
-static void do_protobuf_noise(uint8_t *buffer, size_t *msglen)
-{
- int m = rand_int(0, 2);
- size_t max_size = BUFSIZE - 32 - *msglen;
- if (m == 1)
- {
- /* Prepend */
- uint8_t *tmp = malloc_with_check(BUFSIZE);
- size_t s = rand_fill_protobuf(tmp, rand_len(max_size), BUFSIZE - *msglen, 512);
- memmove(buffer + s, buffer, *msglen);
- memcpy(buffer, tmp, s);
- free_with_check(tmp);
- *msglen += s;
- }
- else if (m == 2)
- {
- /* Append */
- size_t s = rand_fill_protobuf(buffer + *msglen, rand_len(max_size), BUFSIZE - *msglen, 512);
- *msglen += s;
- }
-}
-
-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));
- rand_fill((uint8_t*)msg, 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;
-
- rand_fill(buffer, BUFSIZE);
-
- if (do_static_encode(buffer, &msglen))
- {
- do_protobuf_noise(buffer, &msglen);
-
- status = do_static_decode(buffer, msglen, true);
-
- if (status)
- do_static_roundtrip(buffer, msglen);
-
- status = do_pointer_decode(buffer, msglen, true);
-
- if (status)
- do_pointer_roundtrip(buffer, msglen);
-
- /* Apply randomness to the encoded data */
- while (rand_bool())
- rand_mess(buffer, BUFSIZE);
-
- /* Apply randomness to encoded data length */
- if (rand_bool())
- msglen = rand_int(0, BUFSIZE);
-
- status = do_static_decode(buffer, msglen, false);
- do_pointer_decode(buffer, msglen, status);
-
- if (status)
- {
- do_static_roundtrip(buffer, msglen);
- do_pointer_roundtrip(buffer, msglen);
- }
- }
-
- free_with_check(buffer);
-}
-
-int main(int argc, char **argv)
-{
- int i;
- if (argc > 1)
- {
- random_seed = atol(argv[1]);
- }
- else
- {
- random_seed = time(NULL);
- }
-
- fprintf(stderr, "Random seed: %llu\n", (long long unsigned)random_seed);
-
- for (i = 0; i < 10000; i++)
- {
- run_iteration();
- }
-
- return 0;
-}
-