1 // Copyright 2018 Google Inc.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include <assert.h>
16 #include <stdlib.h>
17 #include <sodium.h>
18
19 #include "fake_random.h"
20
LLVMFuzzerTestOneInput(const unsigned char * data,size_t size)21 extern "C" int LLVMFuzzerTestOneInput(const unsigned char *data, size_t size) {
22 int initialized = sodium_init();
23 assert(initialized >= 0);
24
25 setup_fake_random(data, size);
26
27 unsigned char key[crypto_auth_KEYBYTES];
28 unsigned char mac[crypto_auth_BYTES];
29
30 // this uses a deterministic generator
31 crypto_auth_keygen(key);
32
33 crypto_auth(mac, data, size, key);
34 int err = crypto_auth_verify(mac, data, size, key);
35 assert(err == 0);
36
37 return 0;
38 }
39