1 /*
2 * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <string.h>
11 #include "helpers/ssltestlib.h"
12 #include "testutil.h"
13
14 static int docorrupt = 0;
15
copy_flags(BIO * bio)16 static void copy_flags(BIO *bio)
17 {
18 int flags;
19 BIO *next = BIO_next(bio);
20
21 flags = BIO_test_flags(next, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS);
22 BIO_clear_flags(bio, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS);
23 BIO_set_flags(bio, flags);
24 }
25
tls_corrupt_read(BIO * bio,char * out,int outl)26 static int tls_corrupt_read(BIO *bio, char *out, int outl)
27 {
28 int ret;
29 BIO *next = BIO_next(bio);
30
31 ret = BIO_read(next, out, outl);
32 copy_flags(bio);
33
34 return ret;
35 }
36
tls_corrupt_write(BIO * bio,const char * in,int inl)37 static int tls_corrupt_write(BIO *bio, const char *in, int inl)
38 {
39 int ret;
40 BIO *next = BIO_next(bio);
41 char *copy;
42
43 if (docorrupt) {
44 if (!TEST_ptr(copy = OPENSSL_memdup(in, inl)))
45 return 0;
46 /* corrupt last bit of application data */
47 copy[inl-1] ^= 1;
48 ret = BIO_write(next, copy, inl);
49 OPENSSL_free(copy);
50 } else {
51 ret = BIO_write(next, in, inl);
52 }
53 copy_flags(bio);
54
55 return ret;
56 }
57
tls_corrupt_ctrl(BIO * bio,int cmd,long num,void * ptr)58 static long tls_corrupt_ctrl(BIO *bio, int cmd, long num, void *ptr)
59 {
60 long ret;
61 BIO *next = BIO_next(bio);
62
63 if (next == NULL)
64 return 0;
65
66 switch (cmd) {
67 case BIO_CTRL_DUP:
68 ret = 0L;
69 break;
70 default:
71 ret = BIO_ctrl(next, cmd, num, ptr);
72 break;
73 }
74 return ret;
75 }
76
tls_corrupt_gets(BIO * bio,char * buf,int size)77 static int tls_corrupt_gets(BIO *bio, char *buf, int size)
78 {
79 /* We don't support this - not needed anyway */
80 return -1;
81 }
82
tls_corrupt_puts(BIO * bio,const char * str)83 static int tls_corrupt_puts(BIO *bio, const char *str)
84 {
85 /* We don't support this - not needed anyway */
86 return -1;
87 }
88
tls_corrupt_new(BIO * bio)89 static int tls_corrupt_new(BIO *bio)
90 {
91 BIO_set_init(bio, 1);
92
93 return 1;
94 }
95
tls_corrupt_free(BIO * bio)96 static int tls_corrupt_free(BIO *bio)
97 {
98 BIO_set_init(bio, 0);
99
100 return 1;
101 }
102
103 #define BIO_TYPE_CUSTOM_FILTER (0x80 | BIO_TYPE_FILTER)
104
105 static BIO_METHOD *method_tls_corrupt = NULL;
106
107 /* Note: Not thread safe! */
bio_f_tls_corrupt_filter(void)108 static const BIO_METHOD *bio_f_tls_corrupt_filter(void)
109 {
110 if (method_tls_corrupt == NULL) {
111 method_tls_corrupt = BIO_meth_new(BIO_TYPE_CUSTOM_FILTER,
112 "TLS corrupt filter");
113 if (method_tls_corrupt == NULL
114 || !BIO_meth_set_write(method_tls_corrupt, tls_corrupt_write)
115 || !BIO_meth_set_read(method_tls_corrupt, tls_corrupt_read)
116 || !BIO_meth_set_puts(method_tls_corrupt, tls_corrupt_puts)
117 || !BIO_meth_set_gets(method_tls_corrupt, tls_corrupt_gets)
118 || !BIO_meth_set_ctrl(method_tls_corrupt, tls_corrupt_ctrl)
119 || !BIO_meth_set_create(method_tls_corrupt, tls_corrupt_new)
120 || !BIO_meth_set_destroy(method_tls_corrupt, tls_corrupt_free))
121 return NULL;
122 }
123 return method_tls_corrupt;
124 }
125
bio_f_tls_corrupt_filter_free(void)126 static void bio_f_tls_corrupt_filter_free(void)
127 {
128 BIO_meth_free(method_tls_corrupt);
129 }
130
131 /*
132 * The test is supposed to be executed with RSA key, customarily
133 * with apps/server.pem used even in other tests. For this reason
134 * |cipher_list| is initialized with RSA ciphers' names. This
135 * naturally means that if test is to be re-purposed for other
136 * type of key, then NID_auth_* filter below would need adjustment.
137 */
138 static const char **cipher_list = NULL;
139
setup_cipher_list(void)140 static int setup_cipher_list(void)
141 {
142 SSL_CTX *ctx = NULL;
143 SSL *ssl = NULL;
144 STACK_OF(SSL_CIPHER) *sk_ciphers = NULL;
145 int i, j, numciphers = 0;
146
147 if (!TEST_ptr(ctx = SSL_CTX_new(TLS_server_method()))
148 || !TEST_ptr(ssl = SSL_new(ctx))
149 || !TEST_ptr(sk_ciphers = SSL_get1_supported_ciphers(ssl)))
150 goto err;
151
152 /*
153 * The |cipher_list| will be filled only with names of RSA ciphers,
154 * so that some of the allocated space will be wasted, but the loss
155 * is deemed acceptable...
156 */
157 cipher_list = OPENSSL_malloc(sk_SSL_CIPHER_num(sk_ciphers) *
158 sizeof(cipher_list[0]));
159 if (!TEST_ptr(cipher_list))
160 goto err;
161
162 for (j = 0, i = 0; i < sk_SSL_CIPHER_num(sk_ciphers); i++) {
163 const SSL_CIPHER *cipher = sk_SSL_CIPHER_value(sk_ciphers, i);
164
165 if (SSL_CIPHER_get_auth_nid(cipher) == NID_auth_rsa)
166 cipher_list[j++] = SSL_CIPHER_get_name(cipher);
167 }
168 if (TEST_int_ne(j, 0))
169 numciphers = j;
170
171 err:
172 sk_SSL_CIPHER_free(sk_ciphers);
173 SSL_free(ssl);
174 SSL_CTX_free(ctx);
175
176 return numciphers;
177 }
178
179 static char *cert = NULL;
180 static char *privkey = NULL;
181
test_ssl_corrupt(int testidx)182 static int test_ssl_corrupt(int testidx)
183 {
184 static unsigned char junk[16000] = { 0 };
185 SSL_CTX *sctx = NULL, *cctx = NULL;
186 SSL *server = NULL, *client = NULL;
187 BIO *c_to_s_fbio;
188 int testresult = 0;
189 STACK_OF(SSL_CIPHER) *ciphers;
190 const SSL_CIPHER *currcipher;
191 int err;
192
193 docorrupt = 0;
194
195 TEST_info("Starting #%d, %s", testidx, cipher_list[testidx]);
196
197 if (!TEST_true(create_ssl_ctx_pair(NULL, TLS_server_method(),
198 TLS_client_method(),
199 TLS1_VERSION, 0,
200 &sctx, &cctx, cert, privkey)))
201 return 0;
202
203 if (!TEST_true(SSL_CTX_set_dh_auto(sctx, 1))
204 || !TEST_true(SSL_CTX_set_cipher_list(cctx, cipher_list[testidx]))
205 || !TEST_true(SSL_CTX_set_ciphersuites(cctx, ""))
206 || !TEST_ptr(ciphers = SSL_CTX_get_ciphers(cctx))
207 || !TEST_int_eq(sk_SSL_CIPHER_num(ciphers), 1)
208 || !TEST_ptr(currcipher = sk_SSL_CIPHER_value(ciphers, 0)))
209 goto end;
210
211 /*
212 * No ciphers we are using are TLSv1.3 compatible so we should not attempt
213 * to negotiate TLSv1.3
214 */
215 if (!TEST_true(SSL_CTX_set_max_proto_version(cctx, TLS1_2_VERSION)))
216 goto end;
217
218 if (!TEST_ptr(c_to_s_fbio = BIO_new(bio_f_tls_corrupt_filter())))
219 goto end;
220
221 /* BIO is freed by create_ssl_connection on error */
222 if (!TEST_true(create_ssl_objects(sctx, cctx, &server, &client, NULL,
223 c_to_s_fbio)))
224 goto end;
225
226 if (!TEST_true(create_ssl_connection(server, client, SSL_ERROR_NONE)))
227 goto end;
228
229 docorrupt = 1;
230
231 if (!TEST_int_ge(SSL_write(client, junk, sizeof(junk)), 0))
232 goto end;
233
234 if (!TEST_int_lt(SSL_read(server, junk, sizeof(junk)), 0))
235 goto end;
236
237 do {
238 err = ERR_get_error();
239
240 if (err == 0) {
241 TEST_error("Decryption failed or bad record MAC not seen");
242 goto end;
243 }
244 } while (ERR_GET_REASON(err) != SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC);
245
246 testresult = 1;
247 end:
248 SSL_free(server);
249 SSL_free(client);
250 SSL_CTX_free(sctx);
251 SSL_CTX_free(cctx);
252 return testresult;
253 }
254
255 OPT_TEST_DECLARE_USAGE("certfile privkeyfile\n")
256
setup_tests(void)257 int setup_tests(void)
258 {
259 int n;
260
261 if (!test_skip_common_options()) {
262 TEST_error("Error parsing test options\n");
263 return 0;
264 }
265
266 if (!TEST_ptr(cert = test_get_argument(0))
267 || !TEST_ptr(privkey = test_get_argument(1)))
268 return 0;
269
270 n = setup_cipher_list();
271 if (n > 0)
272 ADD_ALL_TESTS(test_ssl_corrupt, n);
273 return 1;
274 }
275
cleanup_tests(void)276 void cleanup_tests(void)
277 {
278 bio_f_tls_corrupt_filter_free();
279 OPENSSL_free(cipher_list);
280 }
281
