267 lines
7 KiB
C
267 lines
7 KiB
C
/*
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* Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <string.h>
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#include "ssltestlib.h"
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#include "testutil.h"
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static int docorrupt = 0;
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static void copy_flags(BIO *bio)
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{
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int flags;
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BIO *next = BIO_next(bio);
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flags = BIO_test_flags(next, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS);
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BIO_clear_flags(bio, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS);
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BIO_set_flags(bio, flags);
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}
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static int tls_corrupt_read(BIO *bio, char *out, int outl)
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{
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int ret;
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BIO *next = BIO_next(bio);
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ret = BIO_read(next, out, outl);
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copy_flags(bio);
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return ret;
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}
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static int tls_corrupt_write(BIO *bio, const char *in, int inl)
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{
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int ret;
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BIO *next = BIO_next(bio);
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char *copy;
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if (docorrupt) {
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if (!TEST_ptr(copy = BUF_memdup(in, inl)))
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return 0;
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/* corrupt last bit of application data */
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copy[inl-1] ^= 1;
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ret = BIO_write(next, copy, inl);
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OPENSSL_free(copy);
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} else {
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ret = BIO_write(next, in, inl);
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}
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copy_flags(bio);
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return ret;
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}
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static long tls_corrupt_ctrl(BIO *bio, int cmd, long num, void *ptr)
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{
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long ret;
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BIO *next = BIO_next(bio);
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if (next == NULL)
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return 0;
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switch (cmd) {
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case BIO_CTRL_DUP:
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ret = 0L;
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break;
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default:
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ret = BIO_ctrl(next, cmd, num, ptr);
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break;
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}
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return ret;
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}
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static int tls_corrupt_gets(BIO *bio, char *buf, int size)
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{
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/* We don't support this - not needed anyway */
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return -1;
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}
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static int tls_corrupt_puts(BIO *bio, const char *str)
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{
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/* We don't support this - not needed anyway */
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return -1;
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}
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static int tls_corrupt_new(BIO *bio)
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{
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BIO_set_init(bio, 1);
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return 1;
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}
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static int tls_corrupt_free(BIO *bio)
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{
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BIO_set_init(bio, 0);
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return 1;
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}
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#define BIO_TYPE_CUSTOM_FILTER (0x80 | BIO_TYPE_FILTER)
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static BIO_METHOD *method_tls_corrupt = NULL;
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/* Note: Not thread safe! */
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static const BIO_METHOD *bio_f_tls_corrupt_filter(void)
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{
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if (method_tls_corrupt == NULL) {
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method_tls_corrupt = BIO_meth_new(BIO_TYPE_CUSTOM_FILTER,
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"TLS corrupt filter");
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if ( method_tls_corrupt == NULL
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|| !BIO_meth_set_write(method_tls_corrupt, tls_corrupt_write)
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|| !BIO_meth_set_read(method_tls_corrupt, tls_corrupt_read)
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|| !BIO_meth_set_puts(method_tls_corrupt, tls_corrupt_puts)
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|| !BIO_meth_set_gets(method_tls_corrupt, tls_corrupt_gets)
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|| !BIO_meth_set_ctrl(method_tls_corrupt, tls_corrupt_ctrl)
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|| !BIO_meth_set_create(method_tls_corrupt, tls_corrupt_new)
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|| !BIO_meth_set_destroy(method_tls_corrupt, tls_corrupt_free))
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return NULL;
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}
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return method_tls_corrupt;
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}
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static void bio_f_tls_corrupt_filter_free(void)
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{
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BIO_meth_free(method_tls_corrupt);
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}
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/*
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* The test is supposed to be executed with RSA key, customarily
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* with apps/server.pem used even in other tests. For this reason
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* |cipher_list| is initialized with RSA ciphers' names. This
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* naturally means that if test is to be re-purposed for other
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* type of key, then NID_auth_* filter below would need adjustment.
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*/
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static const char **cipher_list = NULL;
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static int setup_cipher_list(void)
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{
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SSL_CTX *ctx = NULL;
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SSL *ssl = NULL;
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STACK_OF(SSL_CIPHER) *sk_ciphers = NULL;
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int i, j, numciphers = 0;
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if (!TEST_ptr(ctx = SSL_CTX_new(TLS_server_method()))
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|| !TEST_ptr(ssl = SSL_new(ctx))
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|| !TEST_ptr(sk_ciphers = SSL_get1_supported_ciphers(ssl)))
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goto err;
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/*
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* The |cipher_list| will be filled only with names of RSA ciphers,
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* so that some of the allocated space will be wasted, but the loss
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* is deemed acceptable...
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*/
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cipher_list = OPENSSL_malloc(sk_SSL_CIPHER_num(sk_ciphers) *
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sizeof(cipher_list[0]));
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if (!TEST_ptr(cipher_list))
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goto err;
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for (j = 0, i = 0; i < sk_SSL_CIPHER_num(sk_ciphers); i++) {
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const SSL_CIPHER *cipher = sk_SSL_CIPHER_value(sk_ciphers, i);
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if (SSL_CIPHER_get_auth_nid(cipher) == NID_auth_rsa)
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cipher_list[j++] = SSL_CIPHER_get_name(cipher);
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}
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if (TEST_int_ne(j, 0))
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numciphers = j;
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err:
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sk_SSL_CIPHER_free(sk_ciphers);
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SSL_free(ssl);
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SSL_CTX_free(ctx);
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return numciphers;
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}
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static char *cert = NULL;
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static char *privkey = NULL;
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static int test_ssl_corrupt(int testidx)
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{
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static unsigned char junk[16000] = { 0 };
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SSL_CTX *sctx = NULL, *cctx = NULL;
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SSL *server = NULL, *client = NULL;
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BIO *c_to_s_fbio;
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int testresult = 0;
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STACK_OF(SSL_CIPHER) *ciphers;
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const SSL_CIPHER *currcipher;
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docorrupt = 0;
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TEST_info("Starting #%d, %s", testidx, cipher_list[testidx]);
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if (!TEST_true(create_ssl_ctx_pair(TLS_server_method(), TLS_client_method(),
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TLS1_VERSION, TLS_MAX_VERSION,
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&sctx, &cctx, cert, privkey)))
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return 0;
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if (!TEST_true(SSL_CTX_set_cipher_list(cctx, cipher_list[testidx]))
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|| !TEST_true(SSL_CTX_set_ciphersuites(cctx, ""))
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|| !TEST_ptr(ciphers = SSL_CTX_get_ciphers(cctx))
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|| !TEST_int_eq(sk_SSL_CIPHER_num(ciphers), 1)
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|| !TEST_ptr(currcipher = sk_SSL_CIPHER_value(ciphers, 0)))
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goto end;
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/*
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* No ciphers we are using are TLSv1.3 compatible so we should not attempt
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* to negotiate TLSv1.3
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*/
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if (!TEST_true(SSL_CTX_set_max_proto_version(cctx, TLS1_2_VERSION)))
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goto end;
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if (!TEST_ptr(c_to_s_fbio = BIO_new(bio_f_tls_corrupt_filter())))
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goto end;
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/* BIO is freed by create_ssl_connection on error */
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if (!TEST_true(create_ssl_objects(sctx, cctx, &server, &client, NULL,
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c_to_s_fbio)))
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goto end;
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if (!TEST_true(create_ssl_connection(server, client, SSL_ERROR_NONE)))
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goto end;
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docorrupt = 1;
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if (!TEST_int_ge(SSL_write(client, junk, sizeof(junk)), 0))
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goto end;
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if (!TEST_int_lt(SSL_read(server, junk, sizeof(junk)), 0))
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goto end;
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if (!TEST_int_eq(ERR_GET_REASON(ERR_peek_error()),
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SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC))
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goto end;
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testresult = 1;
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end:
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SSL_free(server);
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SSL_free(client);
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SSL_CTX_free(sctx);
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SSL_CTX_free(cctx);
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return testresult;
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}
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int setup_tests(void)
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{
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int n;
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if (!TEST_ptr(cert = test_get_argument(0))
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|| !TEST_ptr(privkey = test_get_argument(1))) {
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TEST_note("Usage error: require cert and private key files");
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return 0;
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}
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n = setup_cipher_list();
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if (n > 0)
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ADD_ALL_TESTS(test_ssl_corrupt, n);
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return 1;
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}
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void cleanup_tests(void)
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{
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bio_f_tls_corrupt_filter_free();
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OPENSSL_free(cipher_list);
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}
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