2 * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL licenses, (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.
11 #include <openssl/rand.h>
12 #include <openssl/ssl.h>
13 #include <openssl/rsa.h>
14 #include <openssl/err.h>
17 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
18 extern int rand_predictable;
20 #define ENTROPY_NEEDED 32
22 /* unused, to avoid warning. */
25 int FuzzerInitialize(int *argc, char ***argv)
27 STACK_OF(SSL_COMP) *comp_methods;
29 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS | OPENSSL_INIT_ASYNC, NULL);
30 OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL);
32 CRYPTO_free_ex_index(0, -1);
33 idx = SSL_get_ex_data_X509_STORE_CTX_idx();
34 RAND_add("", 1, ENTROPY_NEEDED);
36 RSA_get_default_method();
37 comp_methods = SSL_COMP_get_compression_methods();
38 OPENSSL_sk_sort((OPENSSL_STACK *)comp_methods);
41 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
48 int FuzzerTestOneInput(const uint8_t *buf, size_t len)
59 * TODO: use the ossltest engine (optionally?) to disable crypto checks.
62 /* This only fuzzes the initial flow from the client so far. */
63 ctx = SSL_CTX_new(SSLv23_method());
65 client = SSL_new(ctx);
66 OPENSSL_assert(SSL_set_cipher_list(client, "ALL:eNULL:@SECLEVEL=0") == 1);
67 SSL_set_tlsext_host_name(client, "localhost");
68 in = BIO_new(BIO_s_mem());
69 out = BIO_new(BIO_s_mem());
70 SSL_set_bio(client, in, out);
71 SSL_set_connect_state(client);
72 OPENSSL_assert((size_t)BIO_write(in, buf, len) == len);
73 if (SSL_do_handshake(client) == 1) {
74 /* Keep reading application data until error or EOF. */
77 if (SSL_read(client, tmp, sizeof(tmp)) <= 0) {
89 void FuzzerCleanup(void)