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 #define MBEDTLS_DECLARE_PRIVATE_IDENTIFIERS
9
10 #include "mbedtls/build_info.h"
11
12 #include "mbedtls/platform.h"
13
14 #if !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_CTR_DRBG_C) || \
15 !defined(MBEDTLS_NET_C) || !defined(MBEDTLS_SSL_SRV_C) || \
16 !defined(MBEDTLS_PEM_PARSE_C) || !defined(MBEDTLS_X509_CRT_PARSE_C)
main(void)17 int main(void)
18 {
19 mbedtls_printf("MBEDTLS_ENTROPY_C and/or MBEDTLS_CTR_DRBG_C and/or "
20 "MBEDTLS_NET_C and/or MBEDTLS_SSL_SRV_C and/or "
21 "MBEDTLS_PEM_PARSE_C and/or MBEDTLS_X509_CRT_PARSE_C "
22 "not defined.\n");
23 mbedtls_exit(0);
24 }
25 #else
26
27 #include <stdlib.h>
28 #include <string.h>
29
30 #if defined(_WIN32)
31 #include <windows.h>
32 #endif
33
34 #include "mbedtls/entropy.h"
35 #include "mbedtls/ctr_drbg.h"
36 #include "mbedtls/x509.h"
37 #include "mbedtls/ssl.h"
38 #include "mbedtls/net_sockets.h"
39 #include "mbedtls/error.h"
40 #include "mbedtls/debug.h"
41 #include "test/certs.h"
42
43 #if defined(MBEDTLS_SSL_CACHE_C)
44 #include "mbedtls/ssl_cache.h"
45 #endif
46
47 #define HTTP_RESPONSE \
48 "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n" \
49 "<h2>Mbed TLS Test Server</h2>\r\n" \
50 "<p>Successful connection using: %s</p>\r\n"
51
52 #define DEBUG_LEVEL 0
53
54
my_debug(void * ctx,int level,const char * file,int line,const char * str)55 static void my_debug(void *ctx, int level,
56 const char *file, int line,
57 const char *str)
58 {
59 ((void) level);
60
61 mbedtls_fprintf((FILE *) ctx, "%s:%04d: %s", file, line, str);
62 fflush((FILE *) ctx);
63 }
64
main(void)65 int main(void)
66 {
67 int ret, len;
68 mbedtls_net_context listen_fd, client_fd;
69 unsigned char buf[1024];
70 const char *pers = "ssl_server";
71
72 mbedtls_entropy_context entropy;
73 mbedtls_ctr_drbg_context ctr_drbg;
74 mbedtls_ssl_context ssl;
75 mbedtls_ssl_config conf;
76 mbedtls_x509_crt srvcert;
77 mbedtls_pk_context pkey;
78 #if defined(MBEDTLS_SSL_CACHE_C)
79 mbedtls_ssl_cache_context cache;
80 #endif
81
82 mbedtls_net_init(&listen_fd);
83 mbedtls_net_init(&client_fd);
84 mbedtls_ssl_init(&ssl);
85 mbedtls_ssl_config_init(&conf);
86 #if defined(MBEDTLS_SSL_CACHE_C)
87 mbedtls_ssl_cache_init(&cache);
88 #endif
89 mbedtls_x509_crt_init(&srvcert);
90 mbedtls_pk_init(&pkey);
91 mbedtls_entropy_init(&entropy);
92 mbedtls_ctr_drbg_init(&ctr_drbg);
93
94 psa_status_t status = psa_crypto_init();
95 if (status != PSA_SUCCESS) {
96 mbedtls_fprintf(stderr, "Failed to initialize PSA Crypto implementation: %d\n",
97 (int) status);
98 ret = MBEDTLS_ERR_SSL_HW_ACCEL_FAILED;
99 goto exit;
100 }
101
102 #if defined(MBEDTLS_DEBUG_C)
103 mbedtls_debug_set_threshold(DEBUG_LEVEL);
104 #endif
105
106 /*
107 * 1. Seed the RNG
108 */
109 mbedtls_printf(" . Seeding the random number generator...");
110 fflush(stdout);
111
112 if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
113 (const unsigned char *) pers,
114 strlen(pers))) != 0) {
115 mbedtls_printf(" failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret);
116 goto exit;
117 }
118
119 mbedtls_printf(" ok\n");
120
121 /*
122 * 2. Load the certificates and private RSA key
123 */
124 mbedtls_printf("\n . Loading the server cert. and key...");
125 fflush(stdout);
126
127 /*
128 * This demonstration program uses embedded test certificates.
129 * Instead, you may want to use mbedtls_x509_crt_parse_file() to read the
130 * server and CA certificates, as well as mbedtls_pk_parse_keyfile().
131 */
132 ret = mbedtls_x509_crt_parse(&srvcert, (const unsigned char *) mbedtls_test_srv_crt,
133 mbedtls_test_srv_crt_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_x509_crt_parse(&srvcert, (const unsigned char *) mbedtls_test_cas_pem,
140 mbedtls_test_cas_pem_len);
141 if (ret != 0) {
142 mbedtls_printf(" failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret);
143 goto exit;
144 }
145
146 ret = mbedtls_pk_parse_key(&pkey, (const unsigned char *) mbedtls_test_srv_key,
147 mbedtls_test_srv_key_len, NULL, 0);
148 if (ret != 0) {
149 mbedtls_printf(" failed\n ! mbedtls_pk_parse_key returned %d\n\n", ret);
150 goto exit;
151 }
152
153 mbedtls_printf(" ok\n");
154
155 /*
156 * 3. Setup the listening TCP socket
157 */
158 mbedtls_printf(" . Bind on https://localhost:4433/ ...");
159 fflush(stdout);
160
161 if ((ret = mbedtls_net_bind(&listen_fd, NULL, "4433", MBEDTLS_NET_PROTO_TCP)) != 0) {
162 mbedtls_printf(" failed\n ! mbedtls_net_bind returned %d\n\n", ret);
163 goto exit;
164 }
165
166 mbedtls_printf(" ok\n");
167
168 /*
169 * 4. Setup stuff
170 */
171 mbedtls_printf(" . Setting up the SSL data....");
172 fflush(stdout);
173
174 if ((ret = mbedtls_ssl_config_defaults(&conf,
175 MBEDTLS_SSL_IS_SERVER,
176 MBEDTLS_SSL_TRANSPORT_STREAM,
177 MBEDTLS_SSL_PRESET_DEFAULT)) != 0) {
178 mbedtls_printf(" failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret);
179 goto exit;
180 }
181
182 mbedtls_ssl_conf_dbg(&conf, my_debug, stdout);
183
184 #if defined(MBEDTLS_SSL_CACHE_C)
185 mbedtls_ssl_conf_session_cache(&conf, &cache,
186 mbedtls_ssl_cache_get,
187 mbedtls_ssl_cache_set);
188 #endif
189
190 mbedtls_ssl_conf_ca_chain(&conf, srvcert.next, NULL);
191 if ((ret = mbedtls_ssl_conf_own_cert(&conf, &srvcert, &pkey)) != 0) {
192 mbedtls_printf(" failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret);
193 goto exit;
194 }
195
196 if ((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0) {
197 mbedtls_printf(" failed\n ! mbedtls_ssl_setup returned %d\n\n", ret);
198 goto exit;
199 }
200
201 mbedtls_printf(" ok\n");
202
203 reset:
204 #ifdef MBEDTLS_ERROR_C
205 if (ret != 0) {
206 char error_buf[100];
207 mbedtls_strerror(ret, error_buf, 100);
208 mbedtls_printf("Last error was: %d - %s\n\n", ret, error_buf);
209 }
210 #endif
211
212 mbedtls_net_free(&client_fd);
213
214 mbedtls_ssl_session_reset(&ssl);
215
216 /*
217 * 3. Wait until a client connects
218 */
219 mbedtls_printf(" . Waiting for a remote connection ...");
220 fflush(stdout);
221
222 if ((ret = mbedtls_net_accept(&listen_fd, &client_fd,
223 NULL, 0, NULL)) != 0) {
224 mbedtls_printf(" failed\n ! mbedtls_net_accept returned %d\n\n", ret);
225 goto exit;
226 }
227
228 mbedtls_ssl_set_bio(&ssl, &client_fd, mbedtls_net_send, mbedtls_net_recv, NULL);
229
230 mbedtls_printf(" ok\n");
231
232 /*
233 * 5. Handshake
234 */
235 mbedtls_printf(" . Performing the SSL/TLS handshake...");
236 fflush(stdout);
237
238 while ((ret = mbedtls_ssl_handshake(&ssl)) != 0) {
239 if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
240 mbedtls_printf(" failed\n ! mbedtls_ssl_handshake returned %d\n\n", ret);
241 goto reset;
242 }
243 }
244
245 mbedtls_printf(" ok\n");
246
247 /*
248 * 6. Read the HTTP Request
249 */
250 mbedtls_printf(" < Read from client:");
251 fflush(stdout);
252
253 do {
254 len = sizeof(buf) - 1;
255 memset(buf, 0, sizeof(buf));
256 ret = mbedtls_ssl_read(&ssl, buf, len);
257
258 if (ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE) {
259 continue;
260 }
261
262 if (ret <= 0) {
263 switch (ret) {
264 case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
265 mbedtls_printf(" connection was closed gracefully\n");
266 break;
267
268 case MBEDTLS_ERR_NET_CONN_RESET:
269 mbedtls_printf(" connection was reset by peer\n");
270 break;
271
272 default:
273 mbedtls_printf(" mbedtls_ssl_read returned -0x%x\n", (unsigned int) -ret);
274 break;
275 }
276
277 break;
278 }
279
280 len = ret;
281 mbedtls_printf(" %d bytes read\n\n%s", len, (char *) buf);
282
283 if (ret > 0) {
284 break;
285 }
286 } while (1);
287
288 /*
289 * 7. Write the 200 Response
290 */
291 mbedtls_printf(" > Write to client:");
292 fflush(stdout);
293
294 len = sprintf((char *) buf, HTTP_RESPONSE,
295 mbedtls_ssl_get_ciphersuite(&ssl));
296
297 while ((ret = mbedtls_ssl_write(&ssl, buf, len)) <= 0) {
298 if (ret == MBEDTLS_ERR_NET_CONN_RESET) {
299 mbedtls_printf(" failed\n ! peer closed the connection\n\n");
300 goto reset;
301 }
302
303 if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
304 mbedtls_printf(" failed\n ! mbedtls_ssl_write returned %d\n\n", ret);
305 goto exit;
306 }
307 }
308
309 len = ret;
310 mbedtls_printf(" %d bytes written\n\n%s\n", len, (char *) buf);
311
312 mbedtls_printf(" . Closing the connection...");
313 fflush(stdout);
314
315 while ((ret = mbedtls_ssl_close_notify(&ssl)) < 0) {
316 if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
317 ret != MBEDTLS_ERR_SSL_WANT_WRITE &&
318 ret != MBEDTLS_ERR_NET_CONN_RESET) {
319 mbedtls_printf(" failed\n ! mbedtls_ssl_close_notify returned %d\n\n", ret);
320 goto reset;
321 }
322 }
323
324 mbedtls_printf(" ok\n");
325 fflush(stdout);
326
327 ret = 0;
328 goto reset;
329
330 exit:
331
332 #ifdef MBEDTLS_ERROR_C
333 if (ret != 0) {
334 char error_buf[100];
335 mbedtls_strerror(ret, error_buf, 100);
336 mbedtls_printf("Last error was: %d - %s\n\n", ret, error_buf);
337 }
338 #endif
339
340 mbedtls_net_free(&client_fd);
341 mbedtls_net_free(&listen_fd);
342 mbedtls_x509_crt_free(&srvcert);
343 mbedtls_pk_free(&pkey);
344 mbedtls_ssl_free(&ssl);
345 mbedtls_ssl_config_free(&conf);
346 #if defined(MBEDTLS_SSL_CACHE_C)
347 mbedtls_ssl_cache_free(&cache);
348 #endif
349 mbedtls_ctr_drbg_free(&ctr_drbg);
350 mbedtls_entropy_free(&entropy);
351 mbedtls_psa_crypto_free();
352
353 mbedtls_exit(ret);
354 }
355
356 #endif /* configuration allows running this program */
357