1 /* 2 * Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * https://www.openssl.org/source/license.html 8 * or in the file LICENSE in the source distribution. 9 */ 10 11 /* 12 * Fuzz the parser used for dumping ASN.1 using "openssl asn1parse". 13 */ 14 15 #include <stdio.h> 16 #include <openssl/asn1.h> 17 #include <openssl/x509.h> 18 #include <openssl/x509v3.h> 19 #include <openssl/err.h> 20 #include "fuzzer.h" 21 22 static BIO *bio_out; 23 24 int FuzzerInitialize(int *argc, char ***argv) 25 { 26 bio_out = BIO_new(BIO_s_null()); /* output will be ignored */ 27 if (bio_out == NULL) 28 return 0; 29 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL); 30 ERR_clear_error(); 31 CRYPTO_free_ex_index(0, -1); 32 return 1; 33 } 34 35 int FuzzerTestOneInput(const uint8_t *buf, size_t len) 36 { 37 (void)ASN1_parse_dump(bio_out, buf, len, 0, 0); 38 ERR_clear_error(); 39 return 0; 40 } 41 42 void FuzzerCleanup(void) 43 { 44 BIO_free(bio_out); 45 } 46