/* * Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ #include #include "ssltestlib.h" #include "testutil.h" static int docorrupt = 0; static void copy_flags(BIO *bio) { int flags; BIO *next = BIO_next(bio); flags = BIO_test_flags(next, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS); BIO_clear_flags(bio, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS); BIO_set_flags(bio, flags); } static int tls_corrupt_read(BIO *bio, char *out, int outl) { int ret; BIO *next = BIO_next(bio); ret = BIO_read(next, out, outl); copy_flags(bio); return ret; } static int tls_corrupt_write(BIO *bio, const char *in, int inl) { int ret; BIO *next = BIO_next(bio); char *copy; if (docorrupt) { if (!TEST_ptr(copy = BUF_memdup(in, inl))) return 0; /* corrupt last bit of application data */ copy[inl-1] ^= 1; ret = BIO_write(next, copy, inl); OPENSSL_free(copy); } else { ret = BIO_write(next, in, inl); } copy_flags(bio); return ret; } static long tls_corrupt_ctrl(BIO *bio, int cmd, long num, void *ptr) { long ret; BIO *next = BIO_next(bio); if (next == NULL) return 0; switch (cmd) { case BIO_CTRL_DUP: ret = 0L; break; default: ret = BIO_ctrl(next, cmd, num, ptr); break; } return ret; } static int tls_corrupt_gets(BIO *bio, char *buf, int size) { /* We don't support this - not needed anyway */ return -1; } static int tls_corrupt_puts(BIO *bio, const char *str) { /* We don't support this - not needed anyway */ return -1; } static int tls_corrupt_new(BIO *bio) { BIO_set_init(bio, 1); return 1; } static int tls_corrupt_free(BIO *bio) { BIO_set_init(bio, 0); return 1; } #define BIO_TYPE_CUSTOM_FILTER (0x80 | BIO_TYPE_FILTER) static BIO_METHOD *method_tls_corrupt = NULL; /* Note: Not thread safe! */ static const BIO_METHOD *bio_f_tls_corrupt_filter(void) { if (method_tls_corrupt == NULL) { method_tls_corrupt = BIO_meth_new(BIO_TYPE_CUSTOM_FILTER, "TLS corrupt filter"); if ( method_tls_corrupt == NULL || !BIO_meth_set_write(method_tls_corrupt, tls_corrupt_write) || !BIO_meth_set_read(method_tls_corrupt, tls_corrupt_read) || !BIO_meth_set_puts(method_tls_corrupt, tls_corrupt_puts) || !BIO_meth_set_gets(method_tls_corrupt, tls_corrupt_gets) || !BIO_meth_set_ctrl(method_tls_corrupt, tls_corrupt_ctrl) || !BIO_meth_set_create(method_tls_corrupt, tls_corrupt_new) || !BIO_meth_set_destroy(method_tls_corrupt, tls_corrupt_free)) return NULL; } return method_tls_corrupt; } static void bio_f_tls_corrupt_filter_free(void) { BIO_meth_free(method_tls_corrupt); } /* * The test is supposed to be executed with RSA key, customarily * with apps/server.pem used even in other tests. For this reason * |cipher_list| is initialized with RSA ciphers' names. This * naturally means that if test is to be re-purposed for other * type of key, then NID_auth_* filter below would need adjustment. */ static const char **cipher_list = NULL; static int setup_cipher_list() { SSL_CTX *ctx = NULL; SSL *ssl = NULL; STACK_OF(SSL_CIPHER) *sk_ciphers = NULL; int i, j, numciphers = 0; if (!TEST_ptr(ctx = SSL_CTX_new(TLS_server_method())) || !TEST_ptr(ssl = SSL_new(ctx)) || !TEST_ptr(sk_ciphers = SSL_get1_supported_ciphers(ssl))) goto err; /* * The |cipher_list| will be filled only with names of RSA ciphers, * so that some of the allocated space will be wasted, but the loss * is deemed acceptable... */ cipher_list = OPENSSL_malloc(sk_SSL_CIPHER_num(sk_ciphers) * sizeof(cipher_list[0])); if (!TEST_ptr(cipher_list)) goto err; for (j = 0, i = 0; i < sk_SSL_CIPHER_num(sk_ciphers); i++) { const SSL_CIPHER *cipher = sk_SSL_CIPHER_value(sk_ciphers, i); if (SSL_CIPHER_get_auth_nid(cipher) == NID_auth_rsa) cipher_list[j++] = SSL_CIPHER_get_name(cipher); } if (TEST_int_ne(j, 0)) numciphers = j; err: sk_SSL_CIPHER_free(sk_ciphers); SSL_free(ssl); SSL_CTX_free(ctx); return numciphers; } static char *cert = NULL; static char *privkey = NULL; static int test_ssl_corrupt(int testidx) { static unsigned char junk[16000] = { 0 }; SSL_CTX *sctx = NULL, *cctx = NULL; SSL *server = NULL, *client = NULL; BIO *c_to_s_fbio; int testresult = 0; STACK_OF(SSL_CIPHER) *ciphers; const SSL_CIPHER *currcipher; docorrupt = 0; TEST_info("Starting #%d, %s", testidx, cipher_list[testidx]); if (!TEST_true(create_ssl_ctx_pair(TLS_server_method(), TLS_client_method(), TLS1_VERSION, TLS_MAX_VERSION, &sctx, &cctx, cert, privkey))) return 0; if (!TEST_true(SSL_CTX_set_cipher_list(cctx, cipher_list[testidx]))) goto end; if (!TEST_ptr(ciphers = SSL_CTX_get_ciphers(cctx)) || !TEST_true(SSL_CTX_set_ciphersuites(cctx, "")) || !TEST_int_eq(sk_SSL_CIPHER_num(ciphers), 1) || !TEST_ptr(currcipher = sk_SSL_CIPHER_value(ciphers, 0))) goto end; /* * No ciphers we are using are TLSv1.3 compatible so we should not attempt * to negotiate TLSv1.3 */ if (!TEST_true(SSL_CTX_set_max_proto_version(cctx, TLS1_2_VERSION))) goto end; if (!TEST_ptr(c_to_s_fbio = BIO_new(bio_f_tls_corrupt_filter()))) goto end; /* BIO is freed by create_ssl_connection on error */ if (!TEST_true(create_ssl_objects(sctx, cctx, &server, &client, NULL, c_to_s_fbio))) goto end; if (!TEST_true(create_ssl_connection(server, client, SSL_ERROR_NONE))) goto end; docorrupt = 1; if (!TEST_int_ge(SSL_write(client, junk, sizeof(junk)), 0)) goto end; if (!TEST_int_lt(SSL_read(server, junk, sizeof(junk)), 0)) goto end; if (!TEST_int_eq(ERR_GET_REASON(ERR_peek_error()), SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC)) goto end; testresult = 1; end: SSL_free(server); SSL_free(client); SSL_CTX_free(sctx); SSL_CTX_free(cctx); return testresult; } int setup_tests(void) { int n; if (!TEST_ptr(cert = test_get_argument(0)) || !TEST_ptr(privkey = test_get_argument(1))) { TEST_note("Usage error: require cert and private key files"); return 0; } n = setup_cipher_list(); if (n > 0) ADD_ALL_TESTS(test_ssl_corrupt, n); return 1; } void cleanup_tests(void) { bio_f_tls_corrupt_filter_free(); OPENSSL_free(cipher_list); }