1 /*
2 * SSL server demonstration program
3 *
4 * Copyright The Mbed TLS Contributors
5 * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
6 */
7
8 #include "mbedtls/build_info.h"
9
10 #include "mbedtls/platform.h"
11
12 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_PEM_PARSE_C) || \
13 !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_SSL_TLS_C) || \
14 !defined(MBEDTLS_SSL_SRV_C) || !defined(MBEDTLS_NET_C) || \
15 !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_CTR_DRBG_C) || \
16 !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_FS_IO)
main(void)17 int main(void)
18 {
19 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C "
20 "and/or MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_SRV_C and/or "
21 "MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or "
22 "MBEDTLS_CTR_DRBG_C and/or MBEDTLS_X509_CRT_PARSE_C "
23 "and/or MBEDTLS_PEM_PARSE_C not defined.\n");
24 mbedtls_exit(0);
25 }
26 #else
27
28 #include <stdlib.h>
29 #include <string.h>
30
31 #if defined(_WIN32)
32 #include <windows.h>
33 #endif
34
35 #include "mbedtls/entropy.h"
36 #include "mbedtls/ctr_drbg.h"
37 #include "mbedtls/x509.h"
38 #include "mbedtls/ssl.h"
39 #include "mbedtls/net_sockets.h"
40 #include "mbedtls/error.h"
41 #include "mbedtls/debug.h"
42 #include "test/certs.h"
43
44 #if defined(MBEDTLS_SSL_CACHE_C)
45 #include "mbedtls/ssl_cache.h"
46 #endif
47
48 #define HTTP_RESPONSE \
49 "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n" \
50 "<h2>Mbed TLS Test Server</h2>\r\n" \
51 "<p>Successful connection using: %s</p>\r\n"
52
53 #define DEBUG_LEVEL 0
54
55
my_debug(void * ctx,int level,const char * file,int line,const char * str)56 static void my_debug(void *ctx, int level,
57 const char *file, int line,
58 const char *str)
59 {
60 ((void) level);
61
62 mbedtls_fprintf((FILE *) ctx, "%s:%04d: %s", file, line, str);
63 fflush((FILE *) ctx);
64 }
65
main(void)66 int main(void)
67 {
68 int ret, len;
69 mbedtls_net_context listen_fd, client_fd;
70 unsigned char buf[1024];
71 const char *pers = "ssl_server";
72
73 mbedtls_entropy_context entropy;
74 mbedtls_ctr_drbg_context ctr_drbg;
75 mbedtls_ssl_context ssl;
76 mbedtls_ssl_config conf;
77 mbedtls_x509_crt srvcert;
78 mbedtls_pk_context pkey;
79 #if defined(MBEDTLS_SSL_CACHE_C)
80 mbedtls_ssl_cache_context cache;
81 #endif
82
83 mbedtls_net_init(&listen_fd);
84 mbedtls_net_init(&client_fd);
85 mbedtls_ssl_init(&ssl);
86 mbedtls_ssl_config_init(&conf);
87 #if defined(MBEDTLS_SSL_CACHE_C)
88 mbedtls_ssl_cache_init(&cache);
89 #endif
90 mbedtls_x509_crt_init(&srvcert);
91 mbedtls_pk_init(&pkey);
92 mbedtls_entropy_init(&entropy);
93 mbedtls_ctr_drbg_init(&ctr_drbg);
94
95 #if defined(MBEDTLS_USE_PSA_CRYPTO)
96 psa_status_t status = psa_crypto_init();
97 if (status != PSA_SUCCESS) {
98 mbedtls_fprintf(stderr, "Failed to initialize PSA Crypto implementation: %d\n",
99 (int) status);
100 ret = MBEDTLS_ERR_SSL_HW_ACCEL_FAILED;
101 goto exit;
102 }
103 #endif /* MBEDTLS_USE_PSA_CRYPTO */
104
105 #if defined(MBEDTLS_DEBUG_C)
106 mbedtls_debug_set_threshold(DEBUG_LEVEL);
107 #endif
108
109 /*
110 * 1. Seed the RNG
111 */
112 mbedtls_printf(" . Seeding the random number generator...");
113 fflush(stdout);
114
115 if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
116 (const unsigned char *) pers,
117 strlen(pers))) != 0) {
118 mbedtls_printf(" failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret);
119 goto exit;
120 }
121
122 mbedtls_printf(" ok\n");
123
124 /*
125 * 2. Load the certificates and private RSA key
126 */
127 mbedtls_printf("\n . Loading the server cert. and key...");
128 fflush(stdout);
129
130 /*
131 * This demonstration program uses embedded test certificates.
132 * Instead, you may want to use mbedtls_x509_crt_parse_file() to read the
133 * server and CA certificates, as well as mbedtls_pk_parse_keyfile().
134 */
135 ret = mbedtls_x509_crt_parse(&srvcert, (const unsigned char *) mbedtls_test_srv_crt,
136 mbedtls_test_srv_crt_len);
137 if (ret != 0) {
138 mbedtls_printf(" failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret);
139 goto exit;
140 }
141
142 ret = mbedtls_x509_crt_parse(&srvcert, (const unsigned char *) mbedtls_test_cas_pem,
143 mbedtls_test_cas_pem_len);
144 if (ret != 0) {
145 mbedtls_printf(" failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret);
146 goto exit;
147 }
148
149 ret = mbedtls_pk_parse_key(&pkey, (const unsigned char *) mbedtls_test_srv_key,
150 mbedtls_test_srv_key_len, NULL, 0,
151 mbedtls_ctr_drbg_random, &ctr_drbg);
152 if (ret != 0) {
153 mbedtls_printf(" failed\n ! mbedtls_pk_parse_key returned %d\n\n", ret);
154 goto exit;
155 }
156
157 mbedtls_printf(" ok\n");
158
159 /*
160 * 3. Setup the listening TCP socket
161 */
162 mbedtls_printf(" . Bind on https://localhost:4433/ ...");
163 fflush(stdout);
164
165 if ((ret = mbedtls_net_bind(&listen_fd, NULL, "4433", MBEDTLS_NET_PROTO_TCP)) != 0) {
166 mbedtls_printf(" failed\n ! mbedtls_net_bind returned %d\n\n", ret);
167 goto exit;
168 }
169
170 mbedtls_printf(" ok\n");
171
172 /*
173 * 4. Setup stuff
174 */
175 mbedtls_printf(" . Setting up the SSL data....");
176 fflush(stdout);
177
178 if ((ret = mbedtls_ssl_config_defaults(&conf,
179 MBEDTLS_SSL_IS_SERVER,
180 MBEDTLS_SSL_TRANSPORT_STREAM,
181 MBEDTLS_SSL_PRESET_DEFAULT)) != 0) {
182 mbedtls_printf(" failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret);
183 goto exit;
184 }
185
186 mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg);
187 mbedtls_ssl_conf_dbg(&conf, my_debug, stdout);
188
189 #if defined(MBEDTLS_SSL_CACHE_C)
190 mbedtls_ssl_conf_session_cache(&conf, &cache,
191 mbedtls_ssl_cache_get,
192 mbedtls_ssl_cache_set);
193 #endif
194
195 mbedtls_ssl_conf_ca_chain(&conf, srvcert.next, NULL);
196 if ((ret = mbedtls_ssl_conf_own_cert(&conf, &srvcert, &pkey)) != 0) {
197 mbedtls_printf(" failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret);
198 goto exit;
199 }
200
201 if ((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0) {
202 mbedtls_printf(" failed\n ! mbedtls_ssl_setup returned %d\n\n", ret);
203 goto exit;
204 }
205
206 mbedtls_printf(" ok\n");
207
208 reset:
209 #ifdef MBEDTLS_ERROR_C
210 if (ret != 0) {
211 char error_buf[100];
212 mbedtls_strerror(ret, error_buf, 100);
213 mbedtls_printf("Last error was: %d - %s\n\n", ret, error_buf);
214 }
215 #endif
216
217 mbedtls_net_free(&client_fd);
218
219 mbedtls_ssl_session_reset(&ssl);
220
221 /*
222 * 3. Wait until a client connects
223 */
224 mbedtls_printf(" . Waiting for a remote connection ...");
225 fflush(stdout);
226
227 if ((ret = mbedtls_net_accept(&listen_fd, &client_fd,
228 NULL, 0, NULL)) != 0) {
229 mbedtls_printf(" failed\n ! mbedtls_net_accept returned %d\n\n", ret);
230 goto exit;
231 }
232
233 mbedtls_ssl_set_bio(&ssl, &client_fd, mbedtls_net_send, mbedtls_net_recv, NULL);
234
235 mbedtls_printf(" ok\n");
236
237 /*
238 * 5. Handshake
239 */
240 mbedtls_printf(" . Performing the SSL/TLS handshake...");
241 fflush(stdout);
242
243 while ((ret = mbedtls_ssl_handshake(&ssl)) != 0) {
244 if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
245 mbedtls_printf(" failed\n ! mbedtls_ssl_handshake returned %d\n\n", ret);
246 goto reset;
247 }
248 }
249
250 mbedtls_printf(" ok\n");
251
252 /*
253 * 6. Read the HTTP Request
254 */
255 mbedtls_printf(" < Read from client:");
256 fflush(stdout);
257
258 do {
259 len = sizeof(buf) - 1;
260 memset(buf, 0, sizeof(buf));
261 ret = mbedtls_ssl_read(&ssl, buf, len);
262
263 if (ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE) {
264 continue;
265 }
266
267 if (ret <= 0) {
268 switch (ret) {
269 case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
270 mbedtls_printf(" connection was closed gracefully\n");
271 break;
272
273 case MBEDTLS_ERR_NET_CONN_RESET:
274 mbedtls_printf(" connection was reset by peer\n");
275 break;
276
277 default:
278 mbedtls_printf(" mbedtls_ssl_read returned -0x%x\n", (unsigned int) -ret);
279 break;
280 }
281
282 break;
283 }
284
285 len = ret;
286 mbedtls_printf(" %d bytes read\n\n%s", len, (char *) buf);
287
288 if (ret > 0) {
289 break;
290 }
291 } while (1);
292
293 /*
294 * 7. Write the 200 Response
295 */
296 mbedtls_printf(" > Write to client:");
297 fflush(stdout);
298
299 len = sprintf((char *) buf, HTTP_RESPONSE,
300 mbedtls_ssl_get_ciphersuite(&ssl));
301
302 while ((ret = mbedtls_ssl_write(&ssl, buf, len)) <= 0) {
303 if (ret == MBEDTLS_ERR_NET_CONN_RESET) {
304 mbedtls_printf(" failed\n ! peer closed the connection\n\n");
305 goto reset;
306 }
307
308 if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
309 mbedtls_printf(" failed\n ! mbedtls_ssl_write returned %d\n\n", ret);
310 goto exit;
311 }
312 }
313
314 len = ret;
315 mbedtls_printf(" %d bytes written\n\n%s\n", len, (char *) buf);
316
317 mbedtls_printf(" . Closing the connection...");
318
319 while ((ret = mbedtls_ssl_close_notify(&ssl)) < 0) {
320 if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
321 ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
322 mbedtls_printf(" failed\n ! mbedtls_ssl_close_notify returned %d\n\n", ret);
323 goto reset;
324 }
325 }
326
327 mbedtls_printf(" ok\n");
328
329 ret = 0;
330 goto reset;
331
332 exit:
333
334 #ifdef MBEDTLS_ERROR_C
335 if (ret != 0) {
336 char error_buf[100];
337 mbedtls_strerror(ret, error_buf, 100);
338 mbedtls_printf("Last error was: %d - %s\n\n", ret, error_buf);
339 }
340 #endif
341
342 mbedtls_net_free(&client_fd);
343 mbedtls_net_free(&listen_fd);
344 mbedtls_x509_crt_free(&srvcert);
345 mbedtls_pk_free(&pkey);
346 mbedtls_ssl_free(&ssl);
347 mbedtls_ssl_config_free(&conf);
348 #if defined(MBEDTLS_SSL_CACHE_C)
349 mbedtls_ssl_cache_free(&cache);
350 #endif
351 mbedtls_ctr_drbg_free(&ctr_drbg);
352 mbedtls_entropy_free(&entropy);
353 #if defined(MBEDTLS_USE_PSA_CRYPTO)
354 mbedtls_psa_crypto_free();
355 #endif /* MBEDTLS_USE_PSA_CRYPTO */
356
357 mbedtls_exit(ret);
358 }
359 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C &&
360 MBEDTLS_SSL_TLS_C && MBEDTLS_SSL_SRV_C && MBEDTLS_NET_C &&
361 MBEDTLS_RSA_C && MBEDTLS_CTR_DRBG_C && MBEDTLS_X509_CRT_PARSE_C
362 && MBEDTLS_FS_IO && MBEDTLS_PEM_PARSE_C */
363
