1 /* 2 * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved. 3 * 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. 9 */ 10 11 #include <time.h> 12 #include <openssl/rand.h> 13 #include <openssl/ssl.h> 14 #include <openssl/rsa.h> 15 #include <openssl/dsa.h> 16 #include <openssl/ec.h> 17 #include <openssl/dh.h> 18 #include <openssl/err.h> 19 #include "fuzzer.h" 20 21 #include "rand.inc" 22 23 /* unused, to avoid warning. */ 24 static int idx; 25 26 #define FUZZTIME 1485898104 27 28 #define TIME_IMPL(t) { if (t != NULL) *t = FUZZTIME; return FUZZTIME; } 29 30 /* 31 * This might not work in all cases (and definitely not on Windows 32 * because of the way linkers are) and callees can still get the 33 * current time instead of the fixed time. This will just result 34 * in things not being fully reproducible and have a slightly 35 * different coverage. 36 */ 37 #if !defined(_WIN32) 38 time_t time(time_t *t) TIME_IMPL(t) 39 #endif 40 41 int FuzzerInitialize(int *argc, char ***argv) 42 { 43 STACK_OF(SSL_COMP) *comp_methods; 44 45 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS | OPENSSL_INIT_ASYNC, NULL); 46 OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL); 47 ERR_get_state(); 48 CRYPTO_free_ex_index(0, -1); 49 idx = SSL_get_ex_data_X509_STORE_CTX_idx(); 50 FuzzerSetRand(); 51 comp_methods = SSL_COMP_get_compression_methods(); 52 if (comp_methods != NULL) 53 sk_SSL_COMP_sort(comp_methods); 54 55 return 1; 56 } 57 58 int FuzzerTestOneInput(const uint8_t *buf, size_t len) 59 { 60 SSL *client; 61 BIO *in; 62 BIO *out; 63 SSL_CTX *ctx; 64 65 if (len == 0) 66 return 0; 67 68 /* 69 * TODO: use the ossltest engine (optionally?) to disable crypto checks. 70 */ 71 72 /* This only fuzzes the initial flow from the client so far. */ 73 ctx = SSL_CTX_new(SSLv23_method()); 74 75 client = SSL_new(ctx); 76 OPENSSL_assert(SSL_set_min_proto_version(client, 0) == 1); 77 OPENSSL_assert(SSL_set_cipher_list(client, "ALL:eNULL:@SECLEVEL=0") == 1); 78 SSL_set_tlsext_host_name(client, "localhost"); 79 in = BIO_new(BIO_s_mem()); 80 out = BIO_new(BIO_s_mem()); 81 SSL_set_bio(client, in, out); 82 SSL_set_connect_state(client); 83 OPENSSL_assert((size_t)BIO_write(in, buf, len) == len); 84 if (SSL_do_handshake(client) == 1) { 85 /* Keep reading application data until error or EOF. */ 86 uint8_t tmp[1024]; 87 for (;;) { 88 if (SSL_read(client, tmp, sizeof(tmp)) <= 0) { 89 break; 90 } 91 } 92 } 93 SSL_free(client); 94 ERR_clear_error(); 95 SSL_CTX_free(ctx); 96 97 return 0; 98 } 99 100 void FuzzerCleanup(void) 101 { 102 } 103