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 #if !defined(MBEDTLS_CONFIG_FILE)
9 #include "mbedtls/config.h"
10 #else
11 #include MBEDTLS_CONFIG_FILE
12 #endif
13
14 #include "mbedtls/platform.h"
15
16 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_CERTS_C) || \
17 !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_SSL_TLS_C) || \
18 !defined(MBEDTLS_SSL_SRV_C) || !defined(MBEDTLS_NET_C) || \
19 !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_CTR_DRBG_C) || \
20 !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
21 !defined(MBEDTLS_PEM_PARSE_C)
main(void)22 int main(void)
23 {
24 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_CERTS_C and/or MBEDTLS_ENTROPY_C "
25 "and/or MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_SRV_C and/or "
26 "MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or "
27 "MBEDTLS_CTR_DRBG_C and/or MBEDTLS_X509_CRT_PARSE_C "
28 "and/or MBEDTLS_PEM_PARSE_C not defined.\n");
29 mbedtls_exit(0);
30 }
31 #else
32
33 #include <stdlib.h>
34 #include <string.h>
35
36 #if defined(_WIN32)
37 #include <windows.h>
38 #endif
39
40 #include "mbedtls/entropy.h"
41 #include "mbedtls/ctr_drbg.h"
42 #include "mbedtls/certs.h"
43 #include "mbedtls/x509.h"
44 #include "mbedtls/ssl.h"
45 #include "mbedtls/net_sockets.h"
46 #include "mbedtls/error.h"
47 #include "mbedtls/debug.h"
48
49 #if defined(MBEDTLS_SSL_CACHE_C)
50 #include "mbedtls/ssl_cache.h"
51 #endif
52
53 #define HTTP_RESPONSE \
54 "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n" \
55 "<h2>Mbed TLS Test Server</h2>\r\n" \
56 "<p>Successful connection using: %s</p>\r\n"
57
58 #define DEBUG_LEVEL 0
59
60
my_debug(void * ctx,int level,const char * file,int line,const char * str)61 static void my_debug(void *ctx, int level,
62 const char *file, int line,
63 const char *str)
64 {
65 ((void) level);
66
67 mbedtls_fprintf((FILE *) ctx, "%s:%04d: %s", file, line, str);
68 fflush((FILE *) ctx);
69 }
70
main(void)71 int main(void)
72 {
73 int ret, len;
74 mbedtls_net_context listen_fd, client_fd;
75 unsigned char buf[1024];
76 const char *pers = "ssl_server";
77
78 mbedtls_entropy_context entropy;
79 mbedtls_ctr_drbg_context ctr_drbg;
80 mbedtls_ssl_context ssl;
81 mbedtls_ssl_config conf;
82 mbedtls_x509_crt srvcert;
83 mbedtls_pk_context pkey;
84 #if defined(MBEDTLS_SSL_CACHE_C)
85 mbedtls_ssl_cache_context cache;
86 #endif
87
88 mbedtls_net_init(&listen_fd);
89 mbedtls_net_init(&client_fd);
90 mbedtls_ssl_init(&ssl);
91 mbedtls_ssl_config_init(&conf);
92 #if defined(MBEDTLS_SSL_CACHE_C)
93 mbedtls_ssl_cache_init(&cache);
94 #endif
95 mbedtls_x509_crt_init(&srvcert);
96 mbedtls_pk_init(&pkey);
97 mbedtls_entropy_init(&entropy);
98 mbedtls_ctr_drbg_init(&ctr_drbg);
99
100 #if defined(MBEDTLS_USE_PSA_CRYPTO)
101 psa_status_t status = psa_crypto_init();
102 if (status != PSA_SUCCESS) {
103 mbedtls_fprintf(stderr, "Failed to initialize PSA Crypto implementation: %d\n",
104 (int) status);
105 ret = MBEDTLS_ERR_SSL_HW_ACCEL_FAILED;
106 goto exit;
107 }
108 #endif /* MBEDTLS_USE_PSA_CRYPTO */
109
110 #if defined(MBEDTLS_DEBUG_C)
111 mbedtls_debug_set_threshold(DEBUG_LEVEL);
112 #endif
113
114 /*
115 * 1. Load the certificates and private RSA key
116 */
117 mbedtls_printf("\n . Loading the server cert. and key...");
118 fflush(stdout);
119
120 /*
121 * This demonstration program uses embedded test certificates.
122 * Instead, you may want to use mbedtls_x509_crt_parse_file() to read the
123 * server and CA certificates, as well as mbedtls_pk_parse_keyfile().
124 */
125 ret = mbedtls_x509_crt_parse(&srvcert, (const unsigned char *) mbedtls_test_srv_crt,
126 mbedtls_test_srv_crt_len);
127 if (ret != 0) {
128 mbedtls_printf(" failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret);
129 goto exit;
130 }
131
132 ret = mbedtls_x509_crt_parse(&srvcert, (const unsigned char *) mbedtls_test_cas_pem,
133 mbedtls_test_cas_pem_len);
134 if (ret != 0) {
135 mbedtls_printf(" failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret);
136 goto exit;
137 }
138
139 ret = mbedtls_pk_parse_key(&pkey, (const unsigned char *) mbedtls_test_srv_key,
140 mbedtls_test_srv_key_len, NULL, 0);
141 if (ret != 0) {
142 mbedtls_printf(" failed\n ! mbedtls_pk_parse_key returned %d\n\n", ret);
143 goto exit;
144 }
145
146 mbedtls_printf(" ok\n");
147
148 /*
149 * 2. Setup the listening TCP socket
150 */
151 mbedtls_printf(" . Bind on https://localhost:4433/ ...");
152 fflush(stdout);
153
154 if ((ret = mbedtls_net_bind(&listen_fd, NULL, "4433", MBEDTLS_NET_PROTO_TCP)) != 0) {
155 mbedtls_printf(" failed\n ! mbedtls_net_bind returned %d\n\n", ret);
156 goto exit;
157 }
158
159 mbedtls_printf(" ok\n");
160
161 /*
162 * 3. Seed the RNG
163 */
164 mbedtls_printf(" . Seeding the random number generator...");
165 fflush(stdout);
166
167 if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
168 (const unsigned char *) pers,
169 strlen(pers))) != 0) {
170 mbedtls_printf(" failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret);
171 goto exit;
172 }
173
174 mbedtls_printf(" ok\n");
175
176 /*
177 * 4. Setup stuff
178 */
179 mbedtls_printf(" . Setting up the SSL data....");
180 fflush(stdout);
181
182 if ((ret = mbedtls_ssl_config_defaults(&conf,
183 MBEDTLS_SSL_IS_SERVER,
184 MBEDTLS_SSL_TRANSPORT_STREAM,
185 MBEDTLS_SSL_PRESET_DEFAULT)) != 0) {
186 mbedtls_printf(" failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret);
187 goto exit;
188 }
189
190 mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg);
191 mbedtls_ssl_conf_dbg(&conf, my_debug, stdout);
192
193 #if defined(MBEDTLS_SSL_CACHE_C)
194 mbedtls_ssl_conf_session_cache(&conf, &cache,
195 mbedtls_ssl_cache_get,
196 mbedtls_ssl_cache_set);
197 #endif
198
199 mbedtls_ssl_conf_ca_chain(&conf, srvcert.next, NULL);
200 if ((ret = mbedtls_ssl_conf_own_cert(&conf, &srvcert, &pkey)) != 0) {
201 mbedtls_printf(" failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret);
202 goto exit;
203 }
204
205 if ((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0) {
206 mbedtls_printf(" failed\n ! mbedtls_ssl_setup returned %d\n\n", ret);
207 goto exit;
208 }
209
210 mbedtls_printf(" ok\n");
211
212 reset:
213 #ifdef MBEDTLS_ERROR_C
214 if (ret != 0) {
215 char error_buf[100];
216 mbedtls_strerror(ret, error_buf, 100);
217 mbedtls_printf("Last error was: %d - %s\n\n", ret, error_buf);
218 }
219 #endif
220
221 mbedtls_net_free(&client_fd);
222
223 mbedtls_ssl_session_reset(&ssl);
224
225 /*
226 * 3. Wait until a client connects
227 */
228 mbedtls_printf(" . Waiting for a remote connection ...");
229 fflush(stdout);
230
231 if ((ret = mbedtls_net_accept(&listen_fd, &client_fd,
232 NULL, 0, NULL)) != 0) {
233 mbedtls_printf(" failed\n ! mbedtls_net_accept returned %d\n\n", ret);
234 goto exit;
235 }
236
237 mbedtls_ssl_set_bio(&ssl, &client_fd, mbedtls_net_send, mbedtls_net_recv, NULL);
238
239 mbedtls_printf(" ok\n");
240
241 /*
242 * 5. Handshake
243 */
244 mbedtls_printf(" . Performing the SSL/TLS handshake...");
245 fflush(stdout);
246
247 while ((ret = mbedtls_ssl_handshake(&ssl)) != 0) {
248 if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
249 mbedtls_printf(" failed\n ! mbedtls_ssl_handshake returned %d\n\n", ret);
250 goto reset;
251 }
252 }
253
254 mbedtls_printf(" ok\n");
255
256 /*
257 * 6. Read the HTTP Request
258 */
259 mbedtls_printf(" < Read from client:");
260 fflush(stdout);
261
262 do {
263 len = sizeof(buf) - 1;
264 memset(buf, 0, sizeof(buf));
265 ret = mbedtls_ssl_read(&ssl, buf, len);
266
267 if (ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE) {
268 continue;
269 }
270
271 if (ret <= 0) {
272 switch (ret) {
273 case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
274 mbedtls_printf(" connection was closed gracefully\n");
275 break;
276
277 case MBEDTLS_ERR_NET_CONN_RESET:
278 mbedtls_printf(" connection was reset by peer\n");
279 break;
280
281 default:
282 mbedtls_printf(" mbedtls_ssl_read returned -0x%x\n", (unsigned int) -ret);
283 break;
284 }
285
286 break;
287 }
288
289 len = ret;
290 mbedtls_printf(" %d bytes read\n\n%s", len, (char *) buf);
291
292 if (ret > 0) {
293 break;
294 }
295 } while (1);
296
297 /*
298 * 7. Write the 200 Response
299 */
300 mbedtls_printf(" > Write to client:");
301 fflush(stdout);
302
303 len = sprintf((char *) buf, HTTP_RESPONSE,
304 mbedtls_ssl_get_ciphersuite(&ssl));
305
306 while ((ret = mbedtls_ssl_write(&ssl, buf, len)) <= 0) {
307 if (ret == MBEDTLS_ERR_NET_CONN_RESET) {
308 mbedtls_printf(" failed\n ! peer closed the connection\n\n");
309 goto reset;
310 }
311
312 if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
313 mbedtls_printf(" failed\n ! mbedtls_ssl_write returned %d\n\n", ret);
314 goto exit;
315 }
316 }
317
318 len = ret;
319 mbedtls_printf(" %d bytes written\n\n%s\n", len, (char *) buf);
320
321 mbedtls_printf(" . Closing the connection...");
322
323 while ((ret = mbedtls_ssl_close_notify(&ssl)) < 0) {
324 if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
325 ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
326 mbedtls_printf(" failed\n ! mbedtls_ssl_close_notify returned %d\n\n", ret);
327 goto reset;
328 }
329 }
330
331 mbedtls_printf(" ok\n");
332
333 ret = 0;
334 goto reset;
335
336 exit:
337
338 #ifdef MBEDTLS_ERROR_C
339 if (ret != 0) {
340 char error_buf[100];
341 mbedtls_strerror(ret, error_buf, 100);
342 mbedtls_printf("Last error was: %d - %s\n\n", ret, error_buf);
343 }
344 #endif
345
346 mbedtls_net_free(&client_fd);
347 mbedtls_net_free(&listen_fd);
348 mbedtls_x509_crt_free(&srvcert);
349 mbedtls_pk_free(&pkey);
350 mbedtls_ssl_free(&ssl);
351 mbedtls_ssl_config_free(&conf);
352 #if defined(MBEDTLS_SSL_CACHE_C)
353 mbedtls_ssl_cache_free(&cache);
354 #endif
355 mbedtls_ctr_drbg_free(&ctr_drbg);
356 mbedtls_entropy_free(&entropy);
357 #if defined(MBEDTLS_USE_PSA_CRYPTO)
358 mbedtls_psa_crypto_free();
359 #endif /* MBEDTLS_USE_PSA_CRYPTO */
360
361 #if defined(_WIN32)
362 mbedtls_printf(" Press Enter to exit this program.\n");
363 fflush(stdout); getchar();
364 #endif
365
366 mbedtls_exit(ret);
367 }
368 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_CERTS_C && MBEDTLS_ENTROPY_C &&
369 MBEDTLS_SSL_TLS_C && MBEDTLS_SSL_SRV_C && MBEDTLS_NET_C &&
370 MBEDTLS_RSA_C && MBEDTLS_CTR_DRBG_C && MBEDTLS_X509_CRT_PARSE_C
371 && MBEDTLS_FS_IO && MBEDTLS_PEM_PARSE_C */
372