1 /*
2  *  SSL client with certificate authentication
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_ALLOW_PRIVATE_ACCESS
9 
10 #include "ssl_test_lib.h"
11 
12 #if defined(MBEDTLS_USE_PSA_CRYPTO) || defined(MBEDTLS_SSL_PROTO_TLS1_3)
13 #include "test/psa_crypto_helpers.h"
14 #endif /* MBEDTLS_USE_PSA_CRYPTO || MBEDTLS_SSL_PROTO_TLS1_3 */
15 
16 #if defined(MBEDTLS_SSL_TEST_IMPOSSIBLE)
main(void)17 int main(void)
18 {
19     mbedtls_printf(MBEDTLS_SSL_TEST_IMPOSSIBLE);
20     mbedtls_exit(0);
21 }
22 #elif !defined(MBEDTLS_SSL_CLI_C)
main(void)23 int main(void)
24 {
25     mbedtls_printf("MBEDTLS_SSL_CLI_C not defined.\n");
26     mbedtls_exit(0);
27 }
28 #else /* !MBEDTLS_SSL_TEST_IMPOSSIBLE && MBEDTLS_SSL_CLI_C */
29 
30 /* Size of memory to be allocated for the heap, when using the library's memory
31  * management and MBEDTLS_MEMORY_BUFFER_ALLOC_C is enabled. */
32 #define MEMORY_HEAP_SIZE      120000
33 
34 #define MAX_REQUEST_SIZE      20000
35 #define MAX_REQUEST_SIZE_STR "20000"
36 
37 #define DFL_SERVER_NAME         "localhost"
38 #define DFL_SERVER_ADDR         NULL
39 #define DFL_SERVER_PORT         "4433"
40 #define DFL_REQUEST_PAGE        "/"
41 #define DFL_REQUEST_SIZE        -1
42 #define DFL_DEBUG_LEVEL         0
43 #define DFL_CONTEXT_CRT_CB      0
44 #define DFL_NBIO                0
45 #define DFL_EVENT               0
46 #define DFL_READ_TIMEOUT        0
47 #define DFL_MAX_RESEND          0
48 #define DFL_CA_FILE             ""
49 #define DFL_CA_PATH             ""
50 #define DFL_CRT_FILE            ""
51 #define DFL_KEY_FILE            ""
52 #define DFL_KEY_OPAQUE          0
53 #define DFL_KEY_PWD             ""
54 #define DFL_PSK                 ""
55 #define DFL_EARLY_DATA          -1
56 #define DFL_PSK_OPAQUE          0
57 #define DFL_PSK_IDENTITY        "Client_identity"
58 #define DFL_ECJPAKE_PW          NULL
59 #define DFL_ECJPAKE_PW_OPAQUE   0
60 #define DFL_EC_MAX_OPS          -1
61 #define DFL_FORCE_CIPHER        0
62 #define DFL_TLS1_3_KEX_MODES    MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_ALL
63 #define DFL_RENEGOTIATION       MBEDTLS_SSL_RENEGOTIATION_DISABLED
64 #define DFL_ALLOW_LEGACY        -2
65 #define DFL_RENEGOTIATE         0
66 #define DFL_EXCHANGES           1
67 #define DFL_MIN_VERSION         -1
68 #define DFL_MAX_VERSION         -1
69 #define DFL_SHA1                -1
70 #define DFL_AUTH_MODE           -1
71 #define DFL_MFL_CODE            MBEDTLS_SSL_MAX_FRAG_LEN_NONE
72 #define DFL_TRUNC_HMAC          -1
73 #define DFL_RECSPLIT            -1
74 #define DFL_DHMLEN              -1
75 #define DFL_RECONNECT           0
76 #define DFL_RECO_SERVER_NAME    NULL
77 #define DFL_RECO_DELAY          0
78 #define DFL_RECO_MODE           1
79 #define DFL_CID_ENABLED         0
80 #define DFL_CID_VALUE           ""
81 #define DFL_CID_ENABLED_RENEGO  -1
82 #define DFL_CID_VALUE_RENEGO    NULL
83 #define DFL_RECONNECT_HARD      0
84 #define DFL_TICKETS             MBEDTLS_SSL_SESSION_TICKETS_ENABLED
85 #define DFL_NEW_SESSION_TICKETS MBEDTLS_SSL_TLS1_3_SIGNAL_NEW_SESSION_TICKETS_ENABLED
86 #define DFL_ALPN_STRING         NULL
87 #define DFL_GROUPS              NULL
88 #define DFL_SIG_ALGS            NULL
89 #define DFL_TRANSPORT           MBEDTLS_SSL_TRANSPORT_STREAM
90 #define DFL_HS_TO_MIN           0
91 #define DFL_HS_TO_MAX           0
92 #define DFL_DTLS_MTU            -1
93 #define DFL_DGRAM_PACKING        1
94 #define DFL_FALLBACK            -1
95 #define DFL_EXTENDED_MS         -1
96 #define DFL_ETM                 -1
97 #define DFL_SERIALIZE           0
98 #define DFL_CONTEXT_FILE        ""
99 #define DFL_EXTENDED_MS_ENFORCE -1
100 #define DFL_CA_CALLBACK         0
101 #define DFL_EAP_TLS             0
102 #define DFL_REPRODUCIBLE        0
103 #define DFL_NSS_KEYLOG          0
104 #define DFL_NSS_KEYLOG_FILE     NULL
105 #define DFL_SKIP_CLOSE_NOTIFY   0
106 #define DFL_QUERY_CONFIG_MODE   0
107 #define DFL_USE_SRTP            0
108 #define DFL_SRTP_FORCE_PROFILE  0
109 #define DFL_SRTP_MKI            ""
110 #define DFL_KEY_OPAQUE_ALG      "none"
111 
112 #define GET_REQUEST "GET %s HTTP/1.0\r\nExtra-header: "
113 #define GET_REQUEST_END "\r\n\r\n"
114 
115 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
116 #define USAGE_CONTEXT_CRT_CB \
117     "    context_crt_cb=%%d   This determines whether the CRT verification callback is bound\n" \
118     "                        to the SSL configuration of the SSL context.\n" \
119     "                        Possible values:\n" \
120     "                        - 0 (default): Use CRT callback bound to configuration\n" \
121     "                        - 1: Use CRT callback bound to SSL context\n"
122 #else
123 #define USAGE_CONTEXT_CRT_CB ""
124 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
125 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
126 #if defined(MBEDTLS_FS_IO)
127 #define USAGE_IO \
128     "    ca_file=%%s          The single file containing the top-level CA(s) you fully trust\n" \
129     "                        default: \"\" (pre-loaded)\n" \
130     "                        use \"none\" to skip loading any top-level CAs.\n" \
131     "    ca_path=%%s          The path containing the top-level CA(s) you fully trust\n" \
132     "                        default: \"\" (pre-loaded) (overrides ca_file)\n" \
133     "                        use \"none\" to skip loading any top-level CAs.\n" \
134     "    crt_file=%%s         Your own cert and chain (in bottom to top order, top may be omitted)\n" \
135     "                        default: \"\" (pre-loaded)\n" \
136     "    key_file=%%s         default: \"\" (pre-loaded)\n" \
137     "    key_pwd=%%s          Password for key specified by key_file argument\n" \
138     "                        default: none\n"
139 #else
140 #define USAGE_IO \
141     "    No file operations available (MBEDTLS_FS_IO not defined)\n"
142 #endif /* MBEDTLS_FS_IO */
143 #else /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
144 #define USAGE_IO ""
145 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
146 #if defined(MBEDTLS_USE_PSA_CRYPTO) && defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
147 #define USAGE_KEY_OPAQUE \
148     "    key_opaque=%%d       Handle your private key as if it were opaque\n" \
149     "                        default: 0 (disabled)\n"
150 #else
151 #define USAGE_KEY_OPAQUE ""
152 #endif
153 
154 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
155 #define USAGE_CID \
156     "    cid=%%d             Disable (0) or enable (1) the use of the DTLS Connection ID extension.\n" \
157     "                       default: 0 (disabled)\n"     \
158     "    cid_renego=%%d      Disable (0) or enable (1) the use of the DTLS Connection ID extension during renegotiation.\n" \
159     "                       default: same as 'cid' parameter\n"     \
160     "    cid_val=%%s          The CID to use for incoming messages (in hex, without 0x).\n"  \
161     "                        default: \"\"\n" \
162     "    cid_val_renego=%%s   The CID to use for incoming messages (in hex, without 0x) after renegotiation.\n"  \
163     "                        default: same as 'cid_val' parameter\n"
164 #else /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
165 #define USAGE_CID ""
166 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
167 
168 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_PSK_ENABLED)
169 #define USAGE_PSK_RAW                                               \
170     "    psk=%%s              default: \"\" (disabled)\n"     \
171     "                          The PSK values are in hex, without 0x.\n" \
172     "    psk_identity=%%s     default: \"Client_identity\"\n"
173 #if defined(MBEDTLS_USE_PSA_CRYPTO)
174 #define USAGE_PSK_SLOT                          \
175     "    psk_opaque=%%d       default: 0 (don't use opaque static PSK)\n"     \
176     "                          Enable this to store the PSK configured through command line\n" \
177     "                          parameter `psk` in a PSA-based key slot.\n" \
178     "                          Note: Currently only supported in conjunction with\n"                  \
179     "                          the use of min_version to force TLS 1.2 and force_ciphersuite \n"      \
180     "                          to force a particular PSK-only ciphersuite.\n"                         \
181     "                          Note: This is to test integration of PSA-based opaque PSKs with\n"     \
182     "                          Mbed TLS only. Production systems are likely to configure Mbed TLS\n"  \
183     "                          with prepopulated key slots instead of importing raw key material.\n"
184 #else
185 #define USAGE_PSK_SLOT ""
186 #endif /* MBEDTLS_USE_PSA_CRYPTO */
187 #define USAGE_PSK USAGE_PSK_RAW USAGE_PSK_SLOT
188 #else
189 #define USAGE_PSK ""
190 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_PSK_ENABLED */
191 
192 #if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
193 #define USAGE_CA_CALLBACK                       \
194     "   ca_callback=%%d       default: 0 (disabled)\n"      \
195     "                         Enable this to use the trusted certificate callback function\n"
196 #else
197 #define USAGE_CA_CALLBACK ""
198 #endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */
199 
200 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
201 #define USAGE_TICKETS                                       \
202     "    tickets=%%d              default: 1 (enabled)\n"    \
203     "    new_session_tickets=%%d  default: 1 (enabled)\n"
204 #else
205 #define USAGE_TICKETS ""
206 #endif /* MBEDTLS_SSL_SESSION_TICKETS */
207 
208 #define USAGE_EAP_TLS                                       \
209     "    eap_tls=%%d          default: 0 (disabled)\n"
210 #define USAGE_NSS_KEYLOG                                    \
211     "    nss_keylog=%%d          default: 0 (disabled)\n"               \
212     "                             This cannot be used with eap_tls=1\n"
213 #define USAGE_NSS_KEYLOG_FILE                               \
214     "    nss_keylog_file=%%s\n"
215 #if defined(MBEDTLS_SSL_DTLS_SRTP)
216 #define USAGE_SRTP \
217     "    use_srtp=%%d         default: 0 (disabled)\n" \
218     "                          This cannot be used with eap_tls=1 or " \
219     "                          nss_keylog=1\n"             \
220     "    srtp_force_profile=%%d  default: 0 (all enabled)\n"   \
221     "                        available profiles:\n"       \
222     "                        1 - SRTP_AES128_CM_HMAC_SHA1_80\n"  \
223     "                        2 - SRTP_AES128_CM_HMAC_SHA1_32\n"  \
224     "                        3 - SRTP_NULL_HMAC_SHA1_80\n"       \
225     "                        4 - SRTP_NULL_HMAC_SHA1_32\n"       \
226     "    mki=%%s              default: \"\" (in hex, without 0x)\n"
227 #else /* MBEDTLS_SSL_DTLS_SRTP */
228 #define USAGE_SRTP ""
229 #endif
230 
231 #if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
232 #define USAGE_MAX_FRAG_LEN                                      \
233     "    max_frag_len=%%d     default: 16384 (tls default)\n"   \
234     "                        options: 512, 1024, 2048, 4096\n"
235 #else
236 #define USAGE_MAX_FRAG_LEN ""
237 #endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
238 
239 #if defined(MBEDTLS_DHM_C)
240 #define USAGE_DHMLEN \
241     "    dhmlen=%%d           default: (library default: 1024 bits)\n"
242 #else
243 #define USAGE_DHMLEN
244 #endif
245 
246 #if defined(MBEDTLS_SSL_ALPN)
247 #define USAGE_ALPN \
248     "    alpn=%%s             default: \"\" (disabled)\n"   \
249     "                        example: spdy/1,http/1.1\n"
250 #else
251 #define USAGE_ALPN ""
252 #endif /* MBEDTLS_SSL_ALPN */
253 
254 #if defined(MBEDTLS_PK_HAVE_ECC_KEYS) || \
255     (defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_SOME_EPHEMERAL_ENABLED) && \
256     defined(PSA_WANT_ALG_FFDH))
257 #define USAGE_GROUPS \
258     "    groups=a,b,c,d      default: \"default\" (library default)\n"        \
259     "                        example: \"secp521r1,brainpoolP512r1\"\n"        \
260     "                        - use \"none\" for empty list\n"                 \
261     "                        - see mbedtls_ecp_curve_list()\n"                \
262     "                          for acceptable EC group names\n"               \
263     "                        - the following ffdh groups are supported:\n"    \
264     "                          ffdhe2048, ffdhe3072, ffdhe4096, ffdhe6144,\n" \
265     "                          ffdhe8192\n"
266 #else
267 #define USAGE_GROUPS ""
268 #endif
269 
270 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
271 #define USAGE_SIG_ALGS \
272     "    sig_algs=a,b,c,d      default: \"default\" (library default)\n"  \
273     "                          example: \"ecdsa_secp256r1_sha256,ecdsa_secp384r1_sha384\"\n"
274 #else
275 #define USAGE_SIG_ALGS ""
276 #endif
277 
278 #if defined(MBEDTLS_SSL_PROTO_DTLS)
279 #define USAGE_DTLS \
280     "    dtls=%%d             default: 0 (TLS)\n"                           \
281     "    hs_timeout=%%d-%%d    default: (library default: 1000-60000)\n"    \
282     "                        range of DTLS handshake timeouts in millisecs\n" \
283     "    mtu=%%d              default: (library default: unlimited)\n"  \
284     "    dgram_packing=%%d    default: 1 (allowed)\n"                   \
285     "                        allow or forbid packing of multiple\n" \
286     "                        records within a single datgram.\n"
287 #else
288 #define USAGE_DTLS ""
289 #endif
290 
291 #if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
292 #define USAGE_EMS \
293     "    extended_ms=0/1     default: (library default: on)\n"
294 #else
295 #define USAGE_EMS ""
296 #endif
297 
298 #if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
299 #define USAGE_ETM \
300     "    etm=0/1             default: (library default: on)\n"
301 #else
302 #define USAGE_ETM ""
303 #endif
304 
305 #define USAGE_REPRODUCIBLE \
306     "    reproducible=0/1     default: 0 (disabled)\n"
307 
308 #if defined(MBEDTLS_SSL_RENEGOTIATION)
309 #define USAGE_RENEGO \
310     "    renegotiation=%%d    default: 0 (disabled)\n"      \
311     "    renegotiate=%%d      default: 0 (disabled)\n"
312 #else
313 #define USAGE_RENEGO ""
314 #endif
315 
316 #if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
317 #if defined(MBEDTLS_USE_PSA_CRYPTO)
318 #define USAGE_ECJPAKE \
319     "    ecjpake_pw=%%s           default: none (disabled)\n"   \
320     "    ecjpake_pw_opaque=%%d    default: 0 (disabled)\n"
321 #else /* MBEDTLS_USE_PSA_CRYPTO */
322 #define USAGE_ECJPAKE \
323     "    ecjpake_pw=%%s           default: none (disabled)\n"
324 #endif /* MBEDTLS_USE_PSA_CRYPTO */
325 #else /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
326 #define USAGE_ECJPAKE ""
327 #endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
328 
329 #if defined(MBEDTLS_ECP_RESTARTABLE)
330 #define USAGE_ECRESTART \
331     "    ec_max_ops=%%s       default: library default (restart disabled)\n"
332 #else
333 #define USAGE_ECRESTART ""
334 #endif
335 
336 #if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION)
337 #define USAGE_SERIALIZATION \
338     "    serialize=%%d        default: 0 (do not serialize/deserialize)\n"     \
339     "                        options: 1 (serialize)\n"                         \
340     "                                 2 (serialize with re-initialization)\n"  \
341     "    context_file=%%s     The file path to write a serialized connection\n" \
342     "                        in the form of base64 code (serialize option\n"   \
343     "                        must be set)\n"                                   \
344     "                         default: \"\" (do nothing)\n"                    \
345     "                         option: a file path\n"
346 #else
347 #define USAGE_SERIALIZATION ""
348 #endif
349 
350 #if defined(MBEDTLS_SSL_EARLY_DATA)
351 #define USAGE_EARLY_DATA \
352     "    early_data=%%d      default: library default\n" \
353     "                        options: 0 (disabled), 1 (enabled)\n"
354 #else
355 #define USAGE_EARLY_DATA ""
356 #endif /* MBEDTLS_SSL_EARLY_DATA && MBEDTLS_SSL_PROTO_TLS1_3 */
357 
358 #define USAGE_KEY_OPAQUE_ALGS \
359     "    key_opaque_algs=%%s  Allowed opaque key algorithms.\n"                      \
360     "                        comma-separated pair of values among the following:\n"    \
361     "                        rsa-sign-pkcs1, rsa-sign-pss, rsa-sign-pss-sha256,\n"     \
362     "                        rsa-sign-pss-sha384, rsa-sign-pss-sha512, rsa-decrypt,\n" \
363     "                        ecdsa-sign, ecdh, none (only acceptable for\n"            \
364     "                        the second value).\n"                                     \
365 
366 #if defined(MBEDTLS_SSL_PROTO_TLS1_3)
367 #define USAGE_TLS1_3_KEY_EXCHANGE_MODES \
368     "    tls13_kex_modes=%%s   default: all\n"     \
369     "                          options: psk, psk_ephemeral, psk_all, ephemeral,\n"     \
370     "                                   ephemeral_all, all, psk_or_ephemeral\n"
371 #else
372 #define USAGE_TLS1_3_KEY_EXCHANGE_MODES ""
373 #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
374 
375 /* USAGE is arbitrarily split to stay under the portable string literal
376  * length limit: 4095 bytes in C99. */
377 #define USAGE1 \
378     "\n usage: ssl_client2 param=<>...\n"                   \
379     "\n acceptable parameters:\n"                           \
380     "    server_name=%%s      default: localhost\n"         \
381     "    server_addr=%%s      default: given by name\n"     \
382     "    server_port=%%d      default: 4433\n"              \
383     "    request_page=%%s     default: \".\"\n"             \
384     "    request_size=%%d     default: about 34 (basic request)\n"           \
385     "                        (minimum: 0, max: " MAX_REQUEST_SIZE_STR ")\n"  \
386                                                                       "                        If 0, in the first exchange only an empty\n"    \
387                                                                       "                        application data message is sent followed by\n" \
388                                                                       "                        a second non-empty message before attempting\n" \
389                                                                       "                        to read a response from the server\n"           \
390                                                                       "    debug_level=%%d      default: 0 (disabled)\n"             \
391                                                                       "    build_version=%%d    default: none (disabled)\n"                     \
392                                                                       "                        option: 1 (print build version only and stop)\n" \
393                                                                       "    nbio=%%d             default: 0 (blocking I/O)\n"         \
394                                                                       "                        options: 1 (non-blocking), 2 (added delays)\n"   \
395                                                                       "    event=%%d            default: 0 (loop)\n"                            \
396                                                                       "                        options: 1 (level-triggered, implies nbio=1),\n" \
397                                                                       "    read_timeout=%%d     default: 0 ms (no timeout)\n"        \
398                                                                       "    max_resend=%%d       default: 0 (no resend on timeout)\n" \
399                                                                       "    skip_close_notify=%%d default: 0 (send close_notify)\n" \
400                                                                       "\n"                                                    \
401     USAGE_DTLS                                              \
402     USAGE_CID                                               \
403     USAGE_SRTP                                              \
404     "\n"
405 #define USAGE2 \
406     "    auth_mode=%%s        default: (library default: none)\n" \
407     "                        options: none, optional, required\n" \
408     USAGE_IO                                                \
409     USAGE_KEY_OPAQUE                                        \
410     USAGE_CA_CALLBACK                                       \
411     "\n"                                                    \
412     USAGE_PSK                                               \
413     USAGE_ECJPAKE                                           \
414     USAGE_ECRESTART                                         \
415     "\n"
416 #define USAGE3 \
417     "    allow_legacy=%%d     default: (library default: no)\n"   \
418     USAGE_RENEGO                                            \
419     "    exchanges=%%d        default: 1\n"                 \
420     "    reconnect=%%d        number of reconnections using session resumption\n" \
421     "                        default: 0 (disabled)\n"       \
422     "    reco_server_name=%%s  default: NULL\n"             \
423     "    reco_delay=%%d       default: 0 milliseconds\n"         \
424     "    reco_mode=%%d        0: copy session, 1: serialize session\n" \
425     "                        default: 1\n"      \
426     "    reconnect_hard=%%d   default: 0 (disabled)\n"      \
427     USAGE_TICKETS                                           \
428     USAGE_EAP_TLS                                           \
429     USAGE_MAX_FRAG_LEN                                      \
430     USAGE_CONTEXT_CRT_CB                                    \
431     USAGE_ALPN                                              \
432     USAGE_EMS                                               \
433     USAGE_ETM                                               \
434     USAGE_REPRODUCIBLE                                      \
435     USAGE_GROUPS                                            \
436     USAGE_SIG_ALGS                                          \
437     USAGE_EARLY_DATA                                        \
438     USAGE_DHMLEN                                            \
439     USAGE_KEY_OPAQUE_ALGS                                   \
440     "\n"
441 
442 #if defined(MBEDTLS_SSL_PROTO_TLS1_3)
443 #define TLS1_3_VERSION_OPTIONS  ", tls13"
444 #else /* MBEDTLS_SSL_PROTO_TLS1_3 */
445 #define TLS1_3_VERSION_OPTIONS  ""
446 #endif /* !MBEDTLS_SSL_PROTO_TLS1_3 */
447 
448 #define USAGE4 \
449     "    allow_sha1=%%d       default: 0\n"                                   \
450     "    min_version=%%s      default: (library default: tls12)\n"            \
451     "    max_version=%%s      default: (library default: tls12)\n"            \
452     "    force_version=%%s    default: \"\" (none)\n"                         \
453     "                         options: tls12, dtls12" TLS1_3_VERSION_OPTIONS  \
454     "\n\n"                                                                    \
455     "    force_ciphersuite=<name>    default: all enabled\n"                  \
456     USAGE_TLS1_3_KEY_EXCHANGE_MODES                                           \
457     "    query_config=<name>         return 0 if the specified\n"             \
458     "                                configuration macro is defined and 1\n"  \
459     "                                otherwise. The expansion of the macro\n" \
460     "                                is printed if it is defined\n"           \
461     USAGE_SERIALIZATION                                                       \
462     "\n"
463 
464 /*
465  * global options
466  */
467 struct options {
468     const char *server_name;    /* hostname of the server (client only)     */
469     const char *server_addr;    /* address of the server (client only)      */
470     const char *server_port;    /* port on which the ssl service runs       */
471     int debug_level;            /* level of debugging                       */
472     int nbio;                   /* should I/O be blocking?                  */
473     int event;                  /* loop or event-driven IO? level or edge triggered? */
474     uint32_t read_timeout;      /* timeout on mbedtls_ssl_read() in milliseconds     */
475     int max_resend;             /* DTLS times to resend on read timeout     */
476     const char *request_page;   /* page on server to request                */
477     int request_size;           /* pad request with header to requested size */
478     const char *ca_file;        /* the file with the CA certificate(s)      */
479     const char *ca_path;        /* the path with the CA certificate(s) reside */
480     const char *crt_file;       /* the file with the client certificate     */
481     const char *key_file;       /* the file with the client key             */
482     int key_opaque;             /* handle private key as if it were opaque  */
483 #if defined(MBEDTLS_USE_PSA_CRYPTO)
484     int psk_opaque;
485 #endif
486 #if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
487     int ca_callback;            /* Use callback for trusted certificate list */
488 #endif
489     const char *key_pwd;        /* the password for the client key          */
490     const char *psk;            /* the pre-shared key                       */
491     const char *psk_identity;   /* the pre-shared key identity              */
492     const char *ecjpake_pw;     /* the EC J-PAKE password                   */
493 #if defined(MBEDTLS_USE_PSA_CRYPTO)
494     int ecjpake_pw_opaque;      /* set to 1 to use the opaque method for setting the password */
495 #endif
496     int ec_max_ops;             /* EC consecutive operations limit          */
497     int force_ciphersuite[2];   /* protocol/ciphersuite to use, or all      */
498 #if defined(MBEDTLS_SSL_PROTO_TLS1_3)
499     int tls13_kex_modes;        /* supported TLS 1.3 key exchange modes     */
500 #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
501     int renegotiation;          /* enable / disable renegotiation           */
502     int allow_legacy;           /* allow legacy renegotiation               */
503     int renegotiate;            /* attempt renegotiation?                   */
504     int renego_delay;           /* delay before enforcing renegotiation     */
505     int exchanges;              /* number of data exchanges                 */
506     int min_version;            /* minimum protocol version accepted        */
507     int max_version;            /* maximum protocol version accepted        */
508     int allow_sha1;             /* flag for SHA-1 support                   */
509     int auth_mode;              /* verify mode for connection               */
510     unsigned char mfl_code;     /* code for maximum fragment length         */
511     int trunc_hmac;             /* negotiate truncated hmac or not          */
512     int recsplit;               /* enable record splitting?                 */
513     int dhmlen;                 /* minimum DHM params len in bits           */
514     int reconnect;              /* attempt to resume session                */
515     const char *reco_server_name;     /* hostname of the server (re-connect)     */
516     int reco_delay;             /* delay in seconds before resuming session */
517     int reco_mode;              /* how to keep the session around           */
518     int reconnect_hard;         /* unexpectedly reconnect from the same port */
519     int tickets;                /* enable / disable session tickets (TLS 1.2) */
520     int new_session_tickets;    /* enable / disable new session tickets (TLS 1.3) */
521     const char *groups;         /* list of supported groups                 */
522     const char *sig_algs;       /* supported TLS 1.3 signature algorithms   */
523     const char *alpn_string;    /* ALPN supported protocols                 */
524     int transport;              /* TLS or DTLS?                             */
525     uint32_t hs_to_min;         /* Initial value of DTLS handshake timer    */
526     uint32_t hs_to_max;         /* Max value of DTLS handshake timer        */
527     int dtls_mtu;               /* UDP Maximum transport unit for DTLS       */
528     int fallback;               /* is this a fallback connection?           */
529     int dgram_packing;          /* allow/forbid datagram packing            */
530     int extended_ms;            /* negotiate extended master secret?        */
531     int etm;                    /* negotiate encrypt then mac?              */
532     int context_crt_cb;         /* use context-specific CRT verify callback */
533     int eap_tls;                /* derive EAP-TLS keying material?          */
534     int nss_keylog;             /* export NSS key log material              */
535     const char *nss_keylog_file; /* NSS key log file                        */
536     int cid_enabled;            /* whether to use the CID extension or not  */
537     int cid_enabled_renego;     /* whether to use the CID extension or not
538                                  * during renegotiation                     */
539     const char *cid_val;        /* the CID to use for incoming messages     */
540     int serialize;              /* serialize/deserialize connection         */
541     const char *context_file;   /* the file to write a serialized connection
542                                  * in the form of base64 code (serialize
543                                  * option must be set)                      */
544     const char *cid_val_renego; /* the CID to use for incoming messages
545                                  * after renegotiation                      */
546     int reproducible;           /* make communication reproducible          */
547     int skip_close_notify;      /* skip sending the close_notify alert      */
548 #if defined(MBEDTLS_SSL_EARLY_DATA)
549     int early_data;             /* early data enablement flag               */
550 #endif
551     int query_config_mode;      /* whether to read config                   */
552     int use_srtp;               /* Support SRTP                             */
553     int force_srtp_profile;     /* SRTP protection profile to use or all    */
554     const char *mki;            /* The dtls mki value to use                */
555     const char *key_opaque_alg1; /* Allowed opaque key alg 1                */
556     const char *key_opaque_alg2; /* Allowed Opaque key alg 2                */
557 } opt;
558 
559 #include "ssl_test_common_source.c"
560 
561 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
562 static unsigned char peer_crt_info[1024];
563 
564 /*
565  * Enabled if debug_level > 1 in code below
566  */
my_verify(void * data,mbedtls_x509_crt * crt,int depth,uint32_t * flags)567 static int my_verify(void *data, mbedtls_x509_crt *crt,
568                      int depth, uint32_t *flags)
569 {
570     char buf[1024];
571     ((void) data);
572 
573     mbedtls_printf("\nVerify requested for (Depth %d):\n", depth);
574 
575 #if !defined(MBEDTLS_X509_REMOVE_INFO)
576     mbedtls_x509_crt_info(buf, sizeof(buf) - 1, "", crt);
577     if (depth == 0) {
578         memcpy(peer_crt_info, buf, sizeof(buf));
579     }
580 
581     if (opt.debug_level == 0) {
582         return 0;
583     }
584 
585     mbedtls_printf("%s", buf);
586 #else
587     ((void) crt);
588     ((void) depth);
589 #endif
590 
591     if ((*flags) == 0) {
592         mbedtls_printf("  This certificate has no flags\n");
593     } else {
594         x509_crt_verify_info(buf, sizeof(buf), "  ! ", *flags);
595         mbedtls_printf("%s\n", buf);
596     }
597 
598     return 0;
599 }
600 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
601 
602 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
report_cid_usage(mbedtls_ssl_context * ssl,const char * additional_description)603 static int report_cid_usage(mbedtls_ssl_context *ssl,
604                             const char *additional_description)
605 {
606     int ret;
607     unsigned char peer_cid[MBEDTLS_SSL_CID_OUT_LEN_MAX];
608     size_t peer_cid_len;
609     int cid_negotiated;
610 
611     if (opt.transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM) {
612         return 0;
613     }
614 
615     /* Check if the use of a CID has been negotiated,
616      * but don't ask for the CID value and length.
617      *
618      * Note: Here and below, we're demonstrating the various ways
619      *       in which mbedtls_ssl_get_peer_cid() can be called,
620      *       depending on whether or not the length/value of the
621      *       peer's CID is needed.
622      *
623      *       An actual application, however, should use
624      *       just one call to mbedtls_ssl_get_peer_cid(). */
625     ret = mbedtls_ssl_get_peer_cid(ssl, &cid_negotiated,
626                                    NULL, NULL);
627     if (ret != 0) {
628         mbedtls_printf(" failed\n  ! mbedtls_ssl_get_peer_cid returned -0x%x\n\n",
629                        (unsigned int) -ret);
630         return ret;
631     }
632 
633     if (cid_negotiated == MBEDTLS_SSL_CID_DISABLED) {
634         if (opt.cid_enabled == MBEDTLS_SSL_CID_ENABLED) {
635             mbedtls_printf("(%s) Use of Connection ID was rejected by the server.\n",
636                            additional_description);
637         }
638     } else {
639         size_t idx = 0;
640         mbedtls_printf("(%s) Use of Connection ID has been negotiated.\n",
641                        additional_description);
642 
643         /* Ask for just the length of the peer's CID. */
644         ret = mbedtls_ssl_get_peer_cid(ssl, &cid_negotiated,
645                                        NULL, &peer_cid_len);
646         if (ret != 0) {
647             mbedtls_printf(" failed\n  ! mbedtls_ssl_get_peer_cid returned -0x%x\n\n",
648                            (unsigned int) -ret);
649             return ret;
650         }
651 
652         /* Ask for just length + value of the peer's CID. */
653         ret = mbedtls_ssl_get_peer_cid(ssl, &cid_negotiated,
654                                        peer_cid, &peer_cid_len);
655         if (ret != 0) {
656             mbedtls_printf(" failed\n  ! mbedtls_ssl_get_peer_cid returned -0x%x\n\n",
657                            (unsigned int) -ret);
658             return ret;
659         }
660         mbedtls_printf("(%s) Peer CID (length %u Bytes): ",
661                        additional_description,
662                        (unsigned) peer_cid_len);
663         while (idx < peer_cid_len) {
664             mbedtls_printf("%02x ", peer_cid[idx]);
665             idx++;
666         }
667         mbedtls_printf("\n");
668     }
669 
670     return 0;
671 }
672 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
673 
ssl_save_session_serialize(mbedtls_ssl_context * ssl,unsigned char ** session_data,size_t * session_data_len)674 static int ssl_save_session_serialize(mbedtls_ssl_context *ssl,
675                                       unsigned char **session_data,
676                                       size_t *session_data_len)
677 {
678     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
679     mbedtls_ssl_session exported_session;
680 
681     /* free any previously saved data */
682     if (*session_data != NULL) {
683         mbedtls_platform_zeroize(*session_data, *session_data_len);
684         mbedtls_free(*session_data);
685         *session_data = NULL;
686         *session_data_len = 0;
687     }
688 
689     mbedtls_ssl_session_init(&exported_session);
690     ret = mbedtls_ssl_get_session(ssl, &exported_session);
691     if (ret != 0) {
692         mbedtls_printf(
693             "failed\n  ! mbedtls_ssl_get_session() returned -%#02x\n",
694             (unsigned) -ret);
695         goto exit;
696     }
697 
698     /* get size of the buffer needed */
699     (void) mbedtls_ssl_session_save(&exported_session, NULL, 0, session_data_len);
700     *session_data = mbedtls_calloc(1, *session_data_len);
701     if (*session_data == NULL) {
702         mbedtls_printf(" failed\n  ! alloc %u bytes for session data\n",
703                        (unsigned) *session_data_len);
704         ret = MBEDTLS_ERR_SSL_ALLOC_FAILED;
705         goto exit;
706     }
707 
708     /* actually save session data */
709     if ((ret = mbedtls_ssl_session_save(&exported_session,
710                                         *session_data, *session_data_len,
711                                         session_data_len)) != 0) {
712         mbedtls_printf(" failed\n  ! mbedtls_ssl_session_saved returned -0x%04x\n\n",
713                        (unsigned int) -ret);
714         goto exit;
715     }
716 
717 exit:
718     mbedtls_ssl_session_free(&exported_session);
719     return ret;
720 }
721 
722 /*
723  * Build HTTP request
724  */
build_http_request(unsigned char * buf,size_t buf_size,size_t * request_len)725 static int build_http_request(unsigned char *buf, size_t buf_size, size_t *request_len)
726 {
727     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
728     size_t len, tail_len, request_size;
729 
730     ret = mbedtls_snprintf((char *) buf, buf_size, GET_REQUEST, opt.request_page);
731     if (ret < 0) {
732         return ret;
733     }
734 
735     len = (size_t) ret;
736     tail_len = strlen(GET_REQUEST_END);
737     if (opt.request_size != DFL_REQUEST_SIZE) {
738         request_size = (size_t) opt.request_size;
739     } else {
740         request_size = len + tail_len;
741     }
742 
743     if (request_size > buf_size) {
744         return MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL;
745     }
746 
747     /* Add padding to GET request to reach opt.request_size in length */
748     if (opt.request_size != DFL_REQUEST_SIZE &&
749         len + tail_len < request_size) {
750         memset(buf + len, 'A', request_size - len - tail_len);
751         len = request_size - tail_len;
752     }
753 
754     strncpy((char *) buf + len, GET_REQUEST_END, buf_size - len);
755     len += tail_len;
756 
757     /* Truncate if request size is smaller than the "natural" size */
758     if (opt.request_size != DFL_REQUEST_SIZE &&
759         len > request_size) {
760         len = request_size;
761 
762         /* Still end with \r\n unless that's really not possible */
763         if (len >= 2) {
764             buf[len - 2] = '\r';
765         }
766         if (len >= 1) {
767             buf[len - 1] = '\n';
768         }
769     }
770 
771     *request_len = len;
772 
773     return 0;
774 }
775 
main(int argc,char * argv[])776 int main(int argc, char *argv[])
777 {
778     int ret = 0, i;
779     size_t len, written, frags, retry_left;
780     int query_config_ret = 0;
781     mbedtls_net_context server_fd;
782     io_ctx_t io_ctx;
783 
784 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
785     uint16_t sig_alg_list[SIG_ALG_LIST_SIZE];
786 #endif
787 
788     unsigned char buf[MAX_REQUEST_SIZE + 1];
789 
790 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_PSK_ENABLED)
791     unsigned char psk[MBEDTLS_PSK_MAX_LEN];
792     size_t psk_len = 0;
793 #endif
794 
795 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
796     unsigned char cid[MBEDTLS_SSL_CID_IN_LEN_MAX];
797     unsigned char cid_renego[MBEDTLS_SSL_CID_IN_LEN_MAX];
798     size_t cid_len = 0;
799     size_t cid_renego_len = 0;
800 #endif
801 
802 #if defined(MBEDTLS_SSL_ALPN)
803     const char *alpn_list[ALPN_LIST_SIZE];
804 #endif
805 
806 #if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
807     unsigned char alloc_buf[MEMORY_HEAP_SIZE];
808 #endif
809     uint16_t group_list[GROUP_LIST_SIZE];
810 #if defined(MBEDTLS_SSL_DTLS_SRTP)
811     unsigned char mki[MBEDTLS_TLS_SRTP_MAX_MKI_LENGTH];
812     size_t mki_len = 0;
813 #endif
814 
815     const char *pers = "ssl_client2";
816 
817 #if defined(MBEDTLS_USE_PSA_CRYPTO)
818 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_PSK_ENABLED)
819     mbedtls_svc_key_id_t slot = MBEDTLS_SVC_KEY_ID_INIT;
820     psa_algorithm_t alg = 0;
821     psa_key_attributes_t key_attributes;
822 #endif
823     psa_status_t status;
824 #endif
825 
826     rng_context_t rng;
827     mbedtls_ssl_context ssl;
828     mbedtls_ssl_config conf;
829     mbedtls_ssl_session saved_session;
830     unsigned char *session_data = NULL;
831     size_t session_data_len = 0;
832 #if defined(MBEDTLS_TIMING_C)
833     mbedtls_timing_delay_context timer;
834 #endif
835 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
836     uint32_t flags;
837     mbedtls_x509_crt cacert;
838     mbedtls_x509_crt clicert;
839     mbedtls_pk_context pkey;
840     mbedtls_x509_crt_profile crt_profile_for_test = mbedtls_x509_crt_profile_default;
841 #if defined(MBEDTLS_USE_PSA_CRYPTO)
842     mbedtls_svc_key_id_t key_slot = MBEDTLS_SVC_KEY_ID_INIT; /* invalid key slot */
843 #endif
844 #endif  /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
845     char *p, *q;
846     const int *list;
847 #if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION)
848     unsigned char *context_buf = NULL;
849     size_t context_buf_len;
850 #endif
851     unsigned char eap_tls_keymaterial[16];
852     unsigned char eap_tls_iv[8];
853     const char *eap_tls_label = "client EAP encryption";
854     eap_tls_keys eap_tls_keying;
855 #if defined(MBEDTLS_SSL_DTLS_SRTP)
856     /*! master keys and master salt for SRTP generated during handshake */
857     unsigned char dtls_srtp_key_material[MBEDTLS_TLS_SRTP_MAX_KEY_MATERIAL_LENGTH];
858     const char *dtls_srtp_label = "EXTRACTOR-dtls_srtp";
859     dtls_srtp_keys dtls_srtp_keying;
860     const mbedtls_ssl_srtp_profile default_profiles[] = {
861         MBEDTLS_TLS_SRTP_AES128_CM_HMAC_SHA1_80,
862         MBEDTLS_TLS_SRTP_AES128_CM_HMAC_SHA1_32,
863         MBEDTLS_TLS_SRTP_NULL_HMAC_SHA1_80,
864         MBEDTLS_TLS_SRTP_NULL_HMAC_SHA1_32,
865         MBEDTLS_TLS_SRTP_UNSET
866     };
867 #endif /* MBEDTLS_SSL_DTLS_SRTP */
868 #if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED) && \
869     defined(MBEDTLS_USE_PSA_CRYPTO)
870     mbedtls_svc_key_id_t ecjpake_pw_slot = MBEDTLS_SVC_KEY_ID_INIT; /* ecjpake password key slot */
871 #endif /* MBEDTLS_USE_PSA_CRYPTO && MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
872 
873 #if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
874     mbedtls_memory_buffer_alloc_init(alloc_buf, sizeof(alloc_buf));
875 #endif
876 
877 #if defined(MBEDTLS_TEST_HOOKS)
878     test_hooks_init();
879 #endif /* MBEDTLS_TEST_HOOKS */
880 
881     /*
882      * Make sure memory references are valid.
883      */
884     mbedtls_net_init(&server_fd);
885     mbedtls_ssl_init(&ssl);
886     mbedtls_ssl_config_init(&conf);
887     mbedtls_ssl_session_init(&saved_session);
888     rng_init(&rng);
889 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
890     mbedtls_x509_crt_init(&cacert);
891     mbedtls_x509_crt_init(&clicert);
892     mbedtls_pk_init(&pkey);
893 #endif
894 #if defined(MBEDTLS_SSL_ALPN)
895     memset((void *) alpn_list, 0, sizeof(alpn_list));
896 #endif
897 
898     /* For builds with TLS 1.3 enabled but not MBEDTLS_USE_PSA_CRYPTO,
899      * we deliberately do not call psa_crypto_init() here, to test that
900      * the library is backward-compatible with versions prior to 3.6.0
901      * where calling psa_crypto_init() was not required to open a TLS
902      * connection in the default configuration. See
903      * https://github.com/Mbed-TLS/mbedtls/issues/9072 and
904      * mbedtls_ssl_tls13_crypto_init().
905      */
906 #if defined(MBEDTLS_USE_PSA_CRYPTO)
907     status = psa_crypto_init();
908     if (status != PSA_SUCCESS) {
909         mbedtls_fprintf(stderr, "Failed to initialize PSA Crypto implementation: %d\n",
910                         (int) status);
911         ret = MBEDTLS_ERR_SSL_HW_ACCEL_FAILED;
912         goto exit;
913     }
914 #endif  /* MBEDTLS_USE_PSA_CRYPTO || MBEDTLS_SSL_PROTO_TLS1_3 */
915 #if defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG)
916     mbedtls_test_enable_insecure_external_rng();
917 #endif  /* MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG */
918 
919     opt.server_name         = DFL_SERVER_NAME;
920     opt.server_addr         = DFL_SERVER_ADDR;
921     opt.server_port         = DFL_SERVER_PORT;
922     opt.debug_level         = DFL_DEBUG_LEVEL;
923     opt.cid_enabled         = DFL_CID_ENABLED;
924     opt.cid_val             = DFL_CID_VALUE;
925     opt.cid_enabled_renego  = DFL_CID_ENABLED_RENEGO;
926     opt.cid_val_renego      = DFL_CID_VALUE_RENEGO;
927     opt.nbio                = DFL_NBIO;
928     opt.event               = DFL_EVENT;
929     opt.context_crt_cb      = DFL_CONTEXT_CRT_CB;
930     opt.read_timeout        = DFL_READ_TIMEOUT;
931     opt.max_resend          = DFL_MAX_RESEND;
932     opt.request_page        = DFL_REQUEST_PAGE;
933     opt.request_size        = DFL_REQUEST_SIZE;
934     opt.ca_file             = DFL_CA_FILE;
935     opt.ca_path             = DFL_CA_PATH;
936     opt.crt_file            = DFL_CRT_FILE;
937     opt.key_file            = DFL_KEY_FILE;
938     opt.key_opaque          = DFL_KEY_OPAQUE;
939     opt.key_pwd             = DFL_KEY_PWD;
940     opt.psk                 = DFL_PSK;
941 #if defined(MBEDTLS_USE_PSA_CRYPTO)
942     opt.psk_opaque          = DFL_PSK_OPAQUE;
943 #endif
944 #if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
945     opt.ca_callback         = DFL_CA_CALLBACK;
946 #endif
947     opt.psk_identity        = DFL_PSK_IDENTITY;
948     opt.ecjpake_pw          = DFL_ECJPAKE_PW;
949 #if defined(MBEDTLS_USE_PSA_CRYPTO)
950     opt.ecjpake_pw_opaque   = DFL_ECJPAKE_PW_OPAQUE;
951 #endif
952     opt.ec_max_ops          = DFL_EC_MAX_OPS;
953     opt.force_ciphersuite[0] = DFL_FORCE_CIPHER;
954 #if defined(MBEDTLS_SSL_PROTO_TLS1_3)
955     opt.tls13_kex_modes     = DFL_TLS1_3_KEX_MODES;
956 #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
957     opt.renegotiation       = DFL_RENEGOTIATION;
958     opt.allow_legacy        = DFL_ALLOW_LEGACY;
959     opt.renegotiate         = DFL_RENEGOTIATE;
960     opt.exchanges           = DFL_EXCHANGES;
961     opt.min_version         = DFL_MIN_VERSION;
962     opt.max_version         = DFL_MAX_VERSION;
963     opt.allow_sha1          = DFL_SHA1;
964     opt.auth_mode           = DFL_AUTH_MODE;
965     opt.mfl_code            = DFL_MFL_CODE;
966     opt.trunc_hmac          = DFL_TRUNC_HMAC;
967     opt.recsplit            = DFL_RECSPLIT;
968     opt.dhmlen              = DFL_DHMLEN;
969     opt.reconnect           = DFL_RECONNECT;
970     opt.reco_server_name    = DFL_RECO_SERVER_NAME;
971     opt.reco_delay          = DFL_RECO_DELAY;
972     opt.reco_mode           = DFL_RECO_MODE;
973     opt.reconnect_hard      = DFL_RECONNECT_HARD;
974     opt.tickets             = DFL_TICKETS;
975     opt.new_session_tickets = DFL_NEW_SESSION_TICKETS;
976     opt.alpn_string         = DFL_ALPN_STRING;
977     opt.groups              = DFL_GROUPS;
978     opt.sig_algs            = DFL_SIG_ALGS;
979 #if defined(MBEDTLS_SSL_EARLY_DATA)
980     opt.early_data          = DFL_EARLY_DATA;
981 #endif
982     opt.transport           = DFL_TRANSPORT;
983     opt.hs_to_min           = DFL_HS_TO_MIN;
984     opt.hs_to_max           = DFL_HS_TO_MAX;
985     opt.dtls_mtu            = DFL_DTLS_MTU;
986     opt.fallback            = DFL_FALLBACK;
987     opt.extended_ms         = DFL_EXTENDED_MS;
988     opt.etm                 = DFL_ETM;
989     opt.dgram_packing       = DFL_DGRAM_PACKING;
990     opt.serialize           = DFL_SERIALIZE;
991     opt.context_file        = DFL_CONTEXT_FILE;
992     opt.eap_tls             = DFL_EAP_TLS;
993     opt.reproducible        = DFL_REPRODUCIBLE;
994     opt.nss_keylog          = DFL_NSS_KEYLOG;
995     opt.nss_keylog_file     = DFL_NSS_KEYLOG_FILE;
996     opt.skip_close_notify   = DFL_SKIP_CLOSE_NOTIFY;
997     opt.query_config_mode   = DFL_QUERY_CONFIG_MODE;
998     opt.use_srtp            = DFL_USE_SRTP;
999     opt.force_srtp_profile  = DFL_SRTP_FORCE_PROFILE;
1000     opt.mki                 = DFL_SRTP_MKI;
1001     opt.key_opaque_alg1     = DFL_KEY_OPAQUE_ALG;
1002     opt.key_opaque_alg2     = DFL_KEY_OPAQUE_ALG;
1003 
1004     p = q = NULL;
1005     if (argc < 1) {
1006 usage:
1007         if (p != NULL && q != NULL) {
1008             printf("unrecognized value for '%s': '%s'\n", p, q);
1009         } else if (p != NULL && q == NULL) {
1010             printf("unrecognized param: '%s'\n", p);
1011         }
1012 
1013         mbedtls_printf("usage: ssl_client2 [param=value] [...]\n");
1014         mbedtls_printf("       ssl_client2 help[_theme]\n");
1015         mbedtls_printf("'help' lists acceptable 'param' and 'value'\n");
1016         mbedtls_printf("'help_ciphersuites' lists available ciphersuites\n");
1017         mbedtls_printf("\n");
1018 
1019         if (ret == 0) {
1020             ret = 1;
1021         }
1022         goto exit;
1023     }
1024 
1025     for (i = 1; i < argc; i++) {
1026         p = argv[i];
1027 
1028         if (strcmp(p, "help") == 0) {
1029             mbedtls_printf(USAGE1);
1030             mbedtls_printf(USAGE2);
1031             mbedtls_printf(USAGE3);
1032             mbedtls_printf(USAGE4);
1033 
1034             ret = 0;
1035             goto exit;
1036         }
1037         if (strcmp(p, "help_ciphersuites") == 0) {
1038             mbedtls_printf(" acceptable ciphersuite names:\n");
1039             for (list = mbedtls_ssl_list_ciphersuites();
1040                  *list != 0;
1041                  list++) {
1042                 mbedtls_printf(" %s\n", mbedtls_ssl_get_ciphersuite_name(*list));
1043             }
1044 
1045             ret = 0;
1046             goto exit;
1047         }
1048 
1049         if ((q = strchr(p, '=')) == NULL) {
1050             mbedtls_printf("param requires a value: '%s'\n", p);
1051             p = NULL; // avoid "unrecnognized param" message
1052             goto usage;
1053         }
1054         *q++ = '\0';
1055 
1056         if (strcmp(p, "server_name") == 0) {
1057             opt.server_name = q;
1058         } else if (strcmp(p, "server_addr") == 0) {
1059             opt.server_addr = q;
1060         } else if (strcmp(p, "server_port") == 0) {
1061             opt.server_port = q;
1062         } else if (strcmp(p, "dtls") == 0) {
1063             int t = atoi(q);
1064             if (t == 0) {
1065                 opt.transport = MBEDTLS_SSL_TRANSPORT_STREAM;
1066             } else if (t == 1) {
1067                 opt.transport = MBEDTLS_SSL_TRANSPORT_DATAGRAM;
1068             } else {
1069                 goto usage;
1070             }
1071         } else if (strcmp(p, "debug_level") == 0) {
1072             opt.debug_level = atoi(q);
1073             if (opt.debug_level < 0 || opt.debug_level > 65535) {
1074                 goto usage;
1075             }
1076         } else if (strcmp(p, "build_version") == 0) {
1077             if (strcmp(q, "1") == 0) {
1078                 mbedtls_printf("build version: %s (build %d)\n",
1079                                MBEDTLS_VERSION_STRING_FULL,
1080                                MBEDTLS_VERSION_NUMBER);
1081                 goto exit;
1082             }
1083         } else if (strcmp(p, "context_crt_cb") == 0) {
1084             opt.context_crt_cb = atoi(q);
1085             if (opt.context_crt_cb != 0 && opt.context_crt_cb != 1) {
1086                 goto usage;
1087             }
1088         } else if (strcmp(p, "nbio") == 0) {
1089             opt.nbio = atoi(q);
1090             if (opt.nbio < 0 || opt.nbio > 2) {
1091                 goto usage;
1092             }
1093         } else if (strcmp(p, "event") == 0) {
1094             opt.event = atoi(q);
1095             if (opt.event < 0 || opt.event > 2) {
1096                 goto usage;
1097             }
1098         } else if (strcmp(p, "read_timeout") == 0) {
1099             opt.read_timeout = atoi(q);
1100         } else if (strcmp(p, "max_resend") == 0) {
1101             opt.max_resend = atoi(q);
1102             if (opt.max_resend < 0) {
1103                 goto usage;
1104             }
1105         } else if (strcmp(p, "request_page") == 0) {
1106             opt.request_page = q;
1107         } else if (strcmp(p, "request_size") == 0) {
1108             opt.request_size = atoi(q);
1109             if (opt.request_size < 0 ||
1110                 opt.request_size > MAX_REQUEST_SIZE) {
1111                 goto usage;
1112             }
1113         } else if (strcmp(p, "ca_file") == 0) {
1114             opt.ca_file = q;
1115         } else if (strcmp(p, "ca_path") == 0) {
1116             opt.ca_path = q;
1117         } else if (strcmp(p, "crt_file") == 0) {
1118             opt.crt_file = q;
1119         } else if (strcmp(p, "key_file") == 0) {
1120             opt.key_file = q;
1121         } else if (strcmp(p, "key_pwd") == 0) {
1122             opt.key_pwd = q;
1123         }
1124 #if defined(MBEDTLS_USE_PSA_CRYPTO) && defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
1125         else if (strcmp(p, "key_opaque") == 0) {
1126             opt.key_opaque = atoi(q);
1127         }
1128 #endif
1129 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
1130         else if (strcmp(p, "cid") == 0) {
1131             opt.cid_enabled = atoi(q);
1132             if (opt.cid_enabled != 0 && opt.cid_enabled != 1) {
1133                 goto usage;
1134             }
1135         } else if (strcmp(p, "cid_renego") == 0) {
1136             opt.cid_enabled_renego = atoi(q);
1137             if (opt.cid_enabled_renego != 0 && opt.cid_enabled_renego != 1) {
1138                 goto usage;
1139             }
1140         } else if (strcmp(p, "cid_val") == 0) {
1141             opt.cid_val = q;
1142         } else if (strcmp(p, "cid_val_renego") == 0) {
1143             opt.cid_val_renego = q;
1144         }
1145 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
1146         else if (strcmp(p, "psk") == 0) {
1147             opt.psk = q;
1148         }
1149 #if defined(MBEDTLS_USE_PSA_CRYPTO)
1150         else if (strcmp(p, "psk_opaque") == 0) {
1151             opt.psk_opaque = atoi(q);
1152         }
1153 #endif
1154 #if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
1155         else if (strcmp(p, "ca_callback") == 0) {
1156             opt.ca_callback = atoi(q);
1157         }
1158 #endif
1159         else if (strcmp(p, "psk_identity") == 0) {
1160             opt.psk_identity = q;
1161         } else if (strcmp(p, "ecjpake_pw") == 0) {
1162             opt.ecjpake_pw = q;
1163         }
1164 #if defined(MBEDTLS_USE_PSA_CRYPTO)
1165         else if (strcmp(p, "ecjpake_pw_opaque") == 0) {
1166             opt.ecjpake_pw_opaque = atoi(q);
1167         }
1168 #endif
1169         else if (strcmp(p, "ec_max_ops") == 0) {
1170             opt.ec_max_ops = atoi(q);
1171         } else if (strcmp(p, "force_ciphersuite") == 0) {
1172             opt.force_ciphersuite[0] = mbedtls_ssl_get_ciphersuite_id(q);
1173 
1174             if (opt.force_ciphersuite[0] == 0) {
1175                 ret = 2;
1176                 goto usage;
1177             }
1178             opt.force_ciphersuite[1] = 0;
1179         } else if (strcmp(p, "renegotiation") == 0) {
1180             opt.renegotiation = (atoi(q)) ?
1181                                 MBEDTLS_SSL_RENEGOTIATION_ENABLED :
1182                                 MBEDTLS_SSL_RENEGOTIATION_DISABLED;
1183         } else if (strcmp(p, "allow_legacy") == 0) {
1184             switch (atoi(q)) {
1185                 case -1:
1186                     opt.allow_legacy = MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE;
1187                     break;
1188                 case 0:
1189                     opt.allow_legacy = MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION;
1190                     break;
1191                 case 1:
1192                     opt.allow_legacy = MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION;
1193                     break;
1194                 default: goto usage;
1195             }
1196         } else if (strcmp(p, "renegotiate") == 0) {
1197             opt.renegotiate = atoi(q);
1198             if (opt.renegotiate < 0 || opt.renegotiate > 1) {
1199                 goto usage;
1200             }
1201         } else if (strcmp(p, "exchanges") == 0) {
1202             opt.exchanges = atoi(q);
1203             if (opt.exchanges < 1) {
1204                 goto usage;
1205             }
1206         } else if (strcmp(p, "reconnect") == 0) {
1207             opt.reconnect = atoi(q);
1208             if (opt.reconnect < 0 || opt.reconnect > 2) {
1209                 goto usage;
1210             }
1211         } else if (strcmp(p, "reco_server_name") == 0) {
1212             opt.reco_server_name = q;
1213         } else if (strcmp(p, "reco_delay") == 0) {
1214             opt.reco_delay = atoi(q);
1215             if (opt.reco_delay < 0) {
1216                 goto usage;
1217             }
1218         } else if (strcmp(p, "reco_mode") == 0) {
1219             opt.reco_mode = atoi(q);
1220             if (opt.reco_mode < 0) {
1221                 goto usage;
1222             }
1223         } else if (strcmp(p, "reconnect_hard") == 0) {
1224             opt.reconnect_hard = atoi(q);
1225             if (opt.reconnect_hard < 0 || opt.reconnect_hard > 1) {
1226                 goto usage;
1227             }
1228         } else if (strcmp(p, "tickets") == 0) {
1229             opt.tickets = atoi(q);
1230             if (opt.tickets < 0) {
1231                 goto usage;
1232             }
1233         } else if (strcmp(p, "new_session_tickets") == 0) {
1234             opt.new_session_tickets = atoi(q);
1235             if (opt.new_session_tickets < 0) {
1236                 goto usage;
1237             }
1238         } else if (strcmp(p, "alpn") == 0) {
1239             opt.alpn_string = q;
1240         } else if (strcmp(p, "extended_ms") == 0) {
1241             switch (atoi(q)) {
1242                 case 0:
1243                     opt.extended_ms = MBEDTLS_SSL_EXTENDED_MS_DISABLED;
1244                     break;
1245                 case 1:
1246                     opt.extended_ms = MBEDTLS_SSL_EXTENDED_MS_ENABLED;
1247                     break;
1248                 default: goto usage;
1249             }
1250         } else if (strcmp(p, "groups") == 0) {
1251             opt.groups = q;
1252         }
1253 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
1254         else if (strcmp(p, "sig_algs") == 0) {
1255             opt.sig_algs = q;
1256         }
1257 #endif
1258         else if (strcmp(p, "etm") == 0) {
1259             switch (atoi(q)) {
1260                 case 0: opt.etm = MBEDTLS_SSL_ETM_DISABLED; break;
1261                 case 1: opt.etm = MBEDTLS_SSL_ETM_ENABLED; break;
1262                 default: goto usage;
1263             }
1264         }
1265 
1266 #if defined(MBEDTLS_SSL_PROTO_TLS1_3)
1267 #if defined(MBEDTLS_SSL_EARLY_DATA)
1268         else if (strcmp(p, "early_data") == 0) {
1269             switch (atoi(q)) {
1270                 case 0:
1271                     opt.early_data = MBEDTLS_SSL_EARLY_DATA_DISABLED;
1272                     break;
1273                 case 1:
1274                     opt.early_data = MBEDTLS_SSL_EARLY_DATA_ENABLED;
1275                     break;
1276                 default: goto usage;
1277             }
1278         }
1279 #endif /* MBEDTLS_SSL_EARLY_DATA */
1280 
1281         else if (strcmp(p, "tls13_kex_modes") == 0) {
1282             if (strcmp(q, "psk") == 0) {
1283                 opt.tls13_kex_modes = MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK;
1284             } else if (strcmp(q, "psk_ephemeral") == 0) {
1285                 opt.tls13_kex_modes = MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK_EPHEMERAL;
1286             } else if (strcmp(q, "ephemeral") == 0) {
1287                 opt.tls13_kex_modes = MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL;
1288             } else if (strcmp(q, "ephemeral_all") == 0) {
1289                 opt.tls13_kex_modes = MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ALL;
1290             } else if (strcmp(q, "psk_all") == 0) {
1291                 opt.tls13_kex_modes = MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK_ALL;
1292             } else if (strcmp(q, "all") == 0) {
1293                 opt.tls13_kex_modes = MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_ALL;
1294             } else if (strcmp(q, "psk_or_ephemeral") == 0) {
1295                 opt.tls13_kex_modes = MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK |
1296                                       MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL;
1297             } else {
1298                 goto usage;
1299             }
1300         }
1301 #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
1302         else if (strcmp(p, "min_version") == 0) {
1303             if (strcmp(q, "tls12") == 0 ||
1304                 strcmp(q, "dtls12") == 0) {
1305                 opt.min_version = MBEDTLS_SSL_VERSION_TLS1_2;
1306             }
1307 #if defined(MBEDTLS_SSL_PROTO_TLS1_3)
1308             else if (strcmp(q, "tls13") == 0) {
1309                 opt.min_version = MBEDTLS_SSL_VERSION_TLS1_3;
1310             }
1311 #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
1312             else {
1313                 goto usage;
1314             }
1315         } else if (strcmp(p, "max_version") == 0) {
1316             if (strcmp(q, "tls12") == 0 ||
1317                 strcmp(q, "dtls12") == 0) {
1318                 opt.max_version = MBEDTLS_SSL_VERSION_TLS1_2;
1319             }
1320 #if defined(MBEDTLS_SSL_PROTO_TLS1_3)
1321             else if (strcmp(q, "tls13") == 0) {
1322                 opt.max_version = MBEDTLS_SSL_VERSION_TLS1_3;
1323             }
1324 #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
1325             else {
1326                 goto usage;
1327             }
1328         } else if (strcmp(p, "allow_sha1") == 0) {
1329             switch (atoi(q)) {
1330                 case 0:     opt.allow_sha1 = 0;   break;
1331                 case 1:     opt.allow_sha1 = 1;    break;
1332                 default:    goto usage;
1333             }
1334         } else if (strcmp(p, "force_version") == 0) {
1335             if (strcmp(q, "tls12") == 0) {
1336                 opt.min_version = MBEDTLS_SSL_VERSION_TLS1_2;
1337                 opt.max_version = MBEDTLS_SSL_VERSION_TLS1_2;
1338             } else if (strcmp(q, "dtls12") == 0) {
1339                 opt.min_version = MBEDTLS_SSL_VERSION_TLS1_2;
1340                 opt.max_version = MBEDTLS_SSL_VERSION_TLS1_2;
1341                 opt.transport = MBEDTLS_SSL_TRANSPORT_DATAGRAM;
1342             }
1343 #if defined(MBEDTLS_SSL_PROTO_TLS1_3)
1344             else if (strcmp(q, "tls13") == 0) {
1345                 opt.min_version = MBEDTLS_SSL_VERSION_TLS1_3;
1346                 opt.max_version = MBEDTLS_SSL_VERSION_TLS1_3;
1347             }
1348 #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
1349             else {
1350                 goto usage;
1351             }
1352         } else if (strcmp(p, "auth_mode") == 0) {
1353             if (strcmp(q, "none") == 0) {
1354                 opt.auth_mode = MBEDTLS_SSL_VERIFY_NONE;
1355             } else if (strcmp(q, "optional") == 0) {
1356                 opt.auth_mode = MBEDTLS_SSL_VERIFY_OPTIONAL;
1357             } else if (strcmp(q, "required") == 0) {
1358                 opt.auth_mode = MBEDTLS_SSL_VERIFY_REQUIRED;
1359             } else {
1360                 goto usage;
1361             }
1362         } else if (strcmp(p, "max_frag_len") == 0) {
1363             if (strcmp(q, "512") == 0) {
1364                 opt.mfl_code = MBEDTLS_SSL_MAX_FRAG_LEN_512;
1365             } else if (strcmp(q, "1024") == 0) {
1366                 opt.mfl_code = MBEDTLS_SSL_MAX_FRAG_LEN_1024;
1367             } else if (strcmp(q, "2048") == 0) {
1368                 opt.mfl_code = MBEDTLS_SSL_MAX_FRAG_LEN_2048;
1369             } else if (strcmp(q, "4096") == 0) {
1370                 opt.mfl_code = MBEDTLS_SSL_MAX_FRAG_LEN_4096;
1371             } else {
1372                 goto usage;
1373             }
1374         } else if (strcmp(p, "trunc_hmac") == 0) {
1375             switch (atoi(q)) {
1376                 case 0: opt.trunc_hmac = MBEDTLS_SSL_TRUNC_HMAC_DISABLED; break;
1377                 case 1: opt.trunc_hmac = MBEDTLS_SSL_TRUNC_HMAC_ENABLED; break;
1378                 default: goto usage;
1379             }
1380         } else if (strcmp(p, "hs_timeout") == 0) {
1381             if ((p = strchr(q, '-')) == NULL) {
1382                 goto usage;
1383             }
1384             *p++ = '\0';
1385             opt.hs_to_min = atoi(q);
1386             opt.hs_to_max = atoi(p);
1387             if (opt.hs_to_min == 0 || opt.hs_to_max < opt.hs_to_min) {
1388                 goto usage;
1389             }
1390         } else if (strcmp(p, "mtu") == 0) {
1391             opt.dtls_mtu = atoi(q);
1392             if (opt.dtls_mtu < 0) {
1393                 goto usage;
1394             }
1395         } else if (strcmp(p, "dgram_packing") == 0) {
1396             opt.dgram_packing = atoi(q);
1397             if (opt.dgram_packing != 0 &&
1398                 opt.dgram_packing != 1) {
1399                 goto usage;
1400             }
1401         } else if (strcmp(p, "recsplit") == 0) {
1402             opt.recsplit = atoi(q);
1403             if (opt.recsplit < 0 || opt.recsplit > 1) {
1404                 goto usage;
1405             }
1406         } else if (strcmp(p, "dhmlen") == 0) {
1407             opt.dhmlen = atoi(q);
1408             if (opt.dhmlen < 0) {
1409                 goto usage;
1410             }
1411         } else if (strcmp(p, "query_config") == 0) {
1412             opt.query_config_mode = 1;
1413             query_config_ret = query_config(q);
1414             goto exit;
1415         } else if (strcmp(p, "serialize") == 0) {
1416             opt.serialize = atoi(q);
1417             if (opt.serialize < 0 || opt.serialize > 2) {
1418                 goto usage;
1419             }
1420         } else if (strcmp(p, "context_file") == 0) {
1421             opt.context_file = q;
1422         } else if (strcmp(p, "eap_tls") == 0) {
1423             opt.eap_tls = atoi(q);
1424             if (opt.eap_tls < 0 || opt.eap_tls > 1) {
1425                 goto usage;
1426             }
1427         } else if (strcmp(p, "reproducible") == 0) {
1428             opt.reproducible = 1;
1429         } else if (strcmp(p, "nss_keylog") == 0) {
1430             opt.nss_keylog = atoi(q);
1431             if (opt.nss_keylog < 0 || opt.nss_keylog > 1) {
1432                 goto usage;
1433             }
1434         } else if (strcmp(p, "nss_keylog_file") == 0) {
1435             opt.nss_keylog_file = q;
1436         } else if (strcmp(p, "skip_close_notify") == 0) {
1437             opt.skip_close_notify = atoi(q);
1438             if (opt.skip_close_notify < 0 || opt.skip_close_notify > 1) {
1439                 goto usage;
1440             }
1441         } else if (strcmp(p, "use_srtp") == 0) {
1442             opt.use_srtp = atoi(q);
1443         } else if (strcmp(p, "srtp_force_profile") == 0) {
1444             opt.force_srtp_profile = atoi(q);
1445         } else if (strcmp(p, "mki") == 0) {
1446             opt.mki = q;
1447         } else if (strcmp(p, "key_opaque_algs") == 0) {
1448             if (key_opaque_alg_parse(q, &opt.key_opaque_alg1,
1449                                      &opt.key_opaque_alg2) != 0) {
1450                 goto usage;
1451             }
1452         } else {
1453             /* This signals that the problem is with p not q */
1454             q = NULL;
1455             goto usage;
1456         }
1457     }
1458     /* This signals that any further errors are not with a single option */
1459     p = q = NULL;
1460 
1461     if (opt.nss_keylog != 0 && opt.eap_tls != 0) {
1462         mbedtls_printf("Error: eap_tls and nss_keylog options cannot be used together.\n");
1463         goto usage;
1464     }
1465 
1466     /* Event-driven IO is incompatible with the above custom
1467      * receive and send functions, as the polling builds on
1468      * refers to the underlying net_context. */
1469     if (opt.event == 1 && opt.nbio != 1) {
1470         mbedtls_printf("Warning: event-driven IO mandates nbio=1 - overwrite\n");
1471         opt.nbio = 1;
1472     }
1473 
1474 #if defined(MBEDTLS_DEBUG_C)
1475     mbedtls_debug_set_threshold(opt.debug_level);
1476 #endif
1477 
1478 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_PSK_ENABLED)
1479     /*
1480      * Unhexify the pre-shared key if any is given
1481      */
1482     if (strlen(opt.psk)) {
1483         if (mbedtls_test_unhexify(psk, sizeof(psk),
1484                                   opt.psk, &psk_len) != 0) {
1485             mbedtls_printf("pre-shared key not valid\n");
1486             goto exit;
1487         }
1488     }
1489 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_PSK_ENABLED */
1490 
1491 #if defined(MBEDTLS_USE_PSA_CRYPTO)
1492     if (opt.psk_opaque != 0) {
1493         if (opt.psk == NULL) {
1494             mbedtls_printf("psk_opaque set but no psk to be imported specified.\n");
1495             ret = 2;
1496             goto usage;
1497         }
1498 
1499         if (opt.force_ciphersuite[0] <= 0) {
1500             mbedtls_printf(
1501                 "opaque PSKs are only supported in conjunction with forcing TLS 1.2 and a PSK-only ciphersuite through the 'force_ciphersuite' option.\n");
1502             ret = 2;
1503             goto usage;
1504         }
1505     }
1506 #endif /* MBEDTLS_USE_PSA_CRYPTO */
1507 
1508     if (opt.force_ciphersuite[0] > 0) {
1509         const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
1510         ciphersuite_info =
1511             mbedtls_ssl_ciphersuite_from_id(opt.force_ciphersuite[0]);
1512 
1513         if (opt.max_version != -1 &&
1514             ciphersuite_info->min_tls_version > opt.max_version) {
1515             mbedtls_printf("forced ciphersuite not allowed with this protocol version\n");
1516             ret = 2;
1517             goto usage;
1518         }
1519         if (opt.min_version != -1 &&
1520             ciphersuite_info->max_tls_version < opt.min_version) {
1521             mbedtls_printf("forced ciphersuite not allowed with this protocol version\n");
1522             ret = 2;
1523             goto usage;
1524         }
1525 
1526         /* If the server selects a version that's not supported by
1527          * this suite, then there will be no common ciphersuite... */
1528         if (opt.max_version == -1 ||
1529             opt.max_version > ciphersuite_info->max_tls_version) {
1530             opt.max_version = ciphersuite_info->max_tls_version;
1531         }
1532         if (opt.min_version < ciphersuite_info->min_tls_version) {
1533             opt.min_version = ciphersuite_info->min_tls_version;
1534             /* DTLS starts with TLS 1.2 */
1535             if (opt.transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
1536                 opt.min_version < MBEDTLS_SSL_VERSION_TLS1_2) {
1537                 opt.min_version = MBEDTLS_SSL_VERSION_TLS1_2;
1538             }
1539         }
1540 
1541 #if defined(MBEDTLS_USE_PSA_CRYPTO)
1542 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_PSK_ENABLED)
1543         if (opt.psk_opaque != 0) {
1544             /* Determine KDF algorithm the opaque PSK will be used in. */
1545 #if defined(MBEDTLS_MD_CAN_SHA384)
1546             if (ciphersuite_info->mac == MBEDTLS_MD_SHA384) {
1547                 alg = PSA_ALG_TLS12_PSK_TO_MS(PSA_ALG_SHA_384);
1548             } else
1549 #endif /* MBEDTLS_MD_CAN_SHA384 */
1550             alg = PSA_ALG_TLS12_PSK_TO_MS(PSA_ALG_SHA_256);
1551         }
1552 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_PSK_ENABLED */
1553 #endif /* MBEDTLS_USE_PSA_CRYPTO */
1554     }
1555 
1556 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
1557     if (mbedtls_test_unhexify(cid, sizeof(cid),
1558                               opt.cid_val, &cid_len) != 0) {
1559         mbedtls_printf("CID not valid\n");
1560         goto exit;
1561     }
1562 
1563     /* Keep CID settings for renegotiation unless
1564      * specified otherwise. */
1565     if (opt.cid_enabled_renego == DFL_CID_ENABLED_RENEGO) {
1566         opt.cid_enabled_renego = opt.cid_enabled;
1567     }
1568     if (opt.cid_val_renego == DFL_CID_VALUE_RENEGO) {
1569         opt.cid_val_renego = opt.cid_val;
1570     }
1571 
1572     if (mbedtls_test_unhexify(cid_renego, sizeof(cid_renego),
1573                               opt.cid_val_renego, &cid_renego_len) != 0) {
1574         mbedtls_printf("CID not valid\n");
1575         goto exit;
1576     }
1577 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
1578 
1579     if (opt.groups != NULL) {
1580         if (parse_groups(opt.groups, group_list, GROUP_LIST_SIZE) != 0) {
1581             goto exit;
1582         }
1583     }
1584 
1585 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
1586     if (opt.sig_algs != NULL) {
1587         p = (char *) opt.sig_algs;
1588         i = 0;
1589 
1590         /* Leave room for a final MBEDTLS_TLS1_3_SIG_NONE in signature algorithm list (sig_alg_list). */
1591         while (i < SIG_ALG_LIST_SIZE - 1 && *p != '\0') {
1592             q = p;
1593 
1594             /* Terminate the current string */
1595             while (*p != ',' && *p != '\0') {
1596                 p++;
1597             }
1598             if (*p == ',') {
1599                 *p++ = '\0';
1600             }
1601 
1602             if (strcmp(q, "rsa_pkcs1_sha256") == 0) {
1603                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_RSA_PKCS1_SHA256;
1604             } else if (strcmp(q, "rsa_pkcs1_sha384") == 0) {
1605                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_RSA_PKCS1_SHA384;
1606             } else if (strcmp(q, "rsa_pkcs1_sha512") == 0) {
1607                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_RSA_PKCS1_SHA512;
1608             } else if (strcmp(q, "ecdsa_secp256r1_sha256") == 0) {
1609                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_ECDSA_SECP256R1_SHA256;
1610             } else if (strcmp(q, "ecdsa_secp384r1_sha384") == 0) {
1611                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_ECDSA_SECP384R1_SHA384;
1612             } else if (strcmp(q, "ecdsa_secp521r1_sha512") == 0) {
1613                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_ECDSA_SECP521R1_SHA512;
1614             } else if (strcmp(q, "rsa_pss_rsae_sha256") == 0) {
1615                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA256;
1616             } else if (strcmp(q, "rsa_pss_rsae_sha384") == 0) {
1617                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA384;
1618             } else if (strcmp(q, "rsa_pss_rsae_sha512") == 0) {
1619                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA512;
1620             } else if (strcmp(q, "ed25519") == 0) {
1621                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_ED25519;
1622             } else if (strcmp(q, "ed448") == 0) {
1623                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_ED448;
1624             } else if (strcmp(q, "rsa_pss_pss_sha256") == 0) {
1625                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_RSA_PSS_PSS_SHA256;
1626             } else if (strcmp(q, "rsa_pss_pss_sha384") == 0) {
1627                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_RSA_PSS_PSS_SHA384;
1628             } else if (strcmp(q, "rsa_pss_pss_sha512") == 0) {
1629                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_RSA_PSS_PSS_SHA512;
1630             } else if (strcmp(q, "rsa_pkcs1_sha1") == 0) {
1631                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_RSA_PKCS1_SHA1;
1632             } else if (strcmp(q, "ecdsa_sha1") == 0) {
1633                 sig_alg_list[i++] = MBEDTLS_TLS1_3_SIG_ECDSA_SHA1;
1634             } else {
1635                 ret = -1;
1636                 mbedtls_printf("unknown signature algorithm \"%s\"\n", q);
1637                 mbedtls_print_supported_sig_algs();
1638                 goto exit;
1639             }
1640         }
1641 
1642         if (i == (SIG_ALG_LIST_SIZE - 1) && *p != '\0') {
1643             mbedtls_printf("signature algorithm list too long, maximum %d",
1644                            SIG_ALG_LIST_SIZE - 1);
1645             goto exit;
1646         }
1647 
1648         sig_alg_list[i] = MBEDTLS_TLS1_3_SIG_NONE;
1649     }
1650 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
1651 
1652 #if defined(MBEDTLS_SSL_ALPN)
1653     if (opt.alpn_string != NULL) {
1654         p = (char *) opt.alpn_string;
1655         i = 0;
1656 
1657         /* Leave room for a final NULL in alpn_list */
1658         while (i < ALPN_LIST_SIZE - 1 && *p != '\0') {
1659             alpn_list[i++] = p;
1660 
1661             /* Terminate the current string and move on to next one */
1662             while (*p != ',' && *p != '\0') {
1663                 p++;
1664             }
1665             if (*p == ',') {
1666                 *p++ = '\0';
1667             }
1668         }
1669     }
1670 #endif /* MBEDTLS_SSL_ALPN */
1671 
1672     mbedtls_printf("build version: %s (build %d)\n",
1673                    MBEDTLS_VERSION_STRING_FULL, MBEDTLS_VERSION_NUMBER);
1674 
1675     /*
1676      * 0. Initialize the RNG and the session data
1677      */
1678     mbedtls_printf("\n  . Seeding the random number generator...");
1679     fflush(stdout);
1680 
1681     ret = rng_seed(&rng, opt.reproducible, pers);
1682     if (ret != 0) {
1683         goto exit;
1684     }
1685     mbedtls_printf(" ok\n");
1686 
1687 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
1688     /*
1689      * 1.1. Load the trusted CA
1690      */
1691     mbedtls_printf("  . Loading the CA root certificate ...");
1692     fflush(stdout);
1693 
1694     if (strcmp(opt.ca_path, "none") == 0 ||
1695         strcmp(opt.ca_file, "none") == 0) {
1696         ret = 0;
1697     } else
1698 #if defined(MBEDTLS_FS_IO)
1699     if (strlen(opt.ca_path)) {
1700         ret = mbedtls_x509_crt_parse_path(&cacert, opt.ca_path);
1701     } else if (strlen(opt.ca_file)) {
1702         ret = mbedtls_x509_crt_parse_file(&cacert, opt.ca_file);
1703     } else
1704 #endif
1705     {
1706 #if defined(MBEDTLS_PEM_PARSE_C)
1707         for (i = 0; mbedtls_test_cas[i] != NULL; i++) {
1708             ret = mbedtls_x509_crt_parse(&cacert,
1709                                          (const unsigned char *) mbedtls_test_cas[i],
1710                                          mbedtls_test_cas_len[i]);
1711             if (ret != 0) {
1712                 break;
1713             }
1714         }
1715 #endif /* MBEDTLS_PEM_PARSE_C */
1716         if (ret == 0) {
1717             for (i = 0; mbedtls_test_cas_der[i] != NULL; i++) {
1718                 ret = mbedtls_x509_crt_parse_der(&cacert,
1719                                                  (const unsigned char *) mbedtls_test_cas_der[i],
1720                                                  mbedtls_test_cas_der_len[i]);
1721                 if (ret != 0) {
1722                     break;
1723                 }
1724             }
1725         }
1726     }
1727     if (ret < 0) {
1728         mbedtls_printf(" failed\n  !  mbedtls_x509_crt_parse returned -0x%x\n\n",
1729                        (unsigned int) -ret);
1730         goto exit;
1731     }
1732 
1733     mbedtls_printf(" ok (%d skipped)\n", ret);
1734 
1735     /*
1736      * 1.2. Load own certificate and private key
1737      *
1738      * (can be skipped if client authentication is not required)
1739      */
1740     mbedtls_printf("  . Loading the client cert. and key...");
1741     fflush(stdout);
1742 
1743     if (strcmp(opt.crt_file, "none") == 0) {
1744         ret = 0;
1745     } else
1746 #if defined(MBEDTLS_FS_IO)
1747     if (strlen(opt.crt_file)) {
1748         ret = mbedtls_x509_crt_parse_file(&clicert, opt.crt_file);
1749     } else
1750 #endif
1751     { ret = mbedtls_x509_crt_parse(&clicert,
1752                                    (const unsigned char *) mbedtls_test_cli_crt,
1753                                    mbedtls_test_cli_crt_len); }
1754     if (ret != 0) {
1755         mbedtls_printf(" failed\n  !  mbedtls_x509_crt_parse returned -0x%x\n\n",
1756                        (unsigned int) -ret);
1757         goto exit;
1758     }
1759 
1760     if (strcmp(opt.key_file, "none") == 0) {
1761         ret = 0;
1762     } else
1763 #if defined(MBEDTLS_FS_IO)
1764     if (strlen(opt.key_file)) {
1765         ret = mbedtls_pk_parse_keyfile(&pkey, opt.key_file, opt.key_pwd, rng_get, &rng);
1766     } else
1767 #endif
1768     { ret = mbedtls_pk_parse_key(&pkey,
1769                                  (const unsigned char *) mbedtls_test_cli_key,
1770                                  mbedtls_test_cli_key_len, NULL, 0, rng_get, &rng); }
1771     if (ret != 0) {
1772         mbedtls_printf(" failed\n  !  mbedtls_pk_parse_key returned -0x%x\n\n",
1773                        (unsigned int) -ret);
1774         goto exit;
1775     }
1776 
1777 #if defined(MBEDTLS_USE_PSA_CRYPTO)
1778     if (opt.key_opaque != 0) {
1779         psa_algorithm_t psa_alg, psa_alg2 = PSA_ALG_NONE;
1780         psa_key_usage_t usage = 0;
1781 
1782         if (key_opaque_set_alg_usage(opt.key_opaque_alg1,
1783                                      opt.key_opaque_alg2,
1784                                      &psa_alg, &psa_alg2,
1785                                      &usage,
1786                                      mbedtls_pk_get_type(&pkey)) == 0) {
1787             ret = pk_wrap_as_opaque(&pkey, psa_alg, psa_alg2, usage, &key_slot);
1788             if (ret != 0) {
1789                 mbedtls_printf(" failed\n  !  "
1790                                "mbedtls_pk_get_psa_attributes returned -0x%x\n\n",
1791                                (unsigned int)  -ret);
1792                 goto exit;
1793             }
1794         }
1795     }
1796 #endif /* MBEDTLS_USE_PSA_CRYPTO */
1797 
1798     mbedtls_printf(" ok (key type: %s)\n",
1799                    strlen(opt.key_file) || strlen(opt.key_opaque_alg1) ?
1800                    mbedtls_pk_get_name(&pkey) : "none");
1801 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
1802 
1803     /*
1804      * 2. Setup stuff
1805      */
1806     mbedtls_printf("  . Setting up the SSL/TLS structure...");
1807     fflush(stdout);
1808 
1809     if ((ret = mbedtls_ssl_config_defaults(&conf,
1810                                            MBEDTLS_SSL_IS_CLIENT,
1811                                            opt.transport,
1812                                            MBEDTLS_SSL_PRESET_DEFAULT)) != 0) {
1813         mbedtls_printf(" failed\n  ! mbedtls_ssl_config_defaults returned -0x%x\n\n",
1814                        (unsigned int) -ret);
1815         goto exit;
1816     }
1817 
1818 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
1819     /* The default algorithms profile disables SHA-1, but our tests still
1820        rely on it heavily. */
1821     if (opt.allow_sha1 > 0) {
1822         crt_profile_for_test.allowed_mds |= MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA1);
1823         mbedtls_ssl_conf_cert_profile(&conf, &crt_profile_for_test);
1824         mbedtls_ssl_conf_sig_algs(&conf, ssl_sig_algs_for_test);
1825     }
1826     if (opt.context_crt_cb == 0) {
1827         mbedtls_ssl_conf_verify(&conf, my_verify, NULL);
1828     }
1829 
1830     memset(peer_crt_info, 0, sizeof(peer_crt_info));
1831 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
1832 
1833 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
1834     if (opt.cid_enabled == 1 || opt.cid_enabled_renego == 1) {
1835         if (opt.cid_enabled == 1        &&
1836             opt.cid_enabled_renego == 1 &&
1837             cid_len != cid_renego_len) {
1838             mbedtls_printf("CID length must not change during renegotiation\n");
1839             goto usage;
1840         }
1841 
1842         if (opt.cid_enabled == 1) {
1843             ret = mbedtls_ssl_conf_cid(&conf, cid_len,
1844                                        MBEDTLS_SSL_UNEXPECTED_CID_IGNORE);
1845         } else {
1846             ret = mbedtls_ssl_conf_cid(&conf, cid_renego_len,
1847                                        MBEDTLS_SSL_UNEXPECTED_CID_IGNORE);
1848         }
1849 
1850         if (ret != 0) {
1851             mbedtls_printf(" failed\n  ! mbedtls_ssl_conf_cid_len returned -%#04x\n\n",
1852                            (unsigned int) -ret);
1853             goto exit;
1854         }
1855     }
1856 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
1857 
1858     if (opt.auth_mode != DFL_AUTH_MODE) {
1859         mbedtls_ssl_conf_authmode(&conf, opt.auth_mode);
1860     }
1861 
1862 #if defined(MBEDTLS_SSL_PROTO_DTLS)
1863     if (opt.hs_to_min != DFL_HS_TO_MIN || opt.hs_to_max != DFL_HS_TO_MAX) {
1864         mbedtls_ssl_conf_handshake_timeout(&conf, opt.hs_to_min,
1865                                            opt.hs_to_max);
1866     }
1867 
1868     if (opt.dgram_packing != DFL_DGRAM_PACKING) {
1869         mbedtls_ssl_set_datagram_packing(&ssl, opt.dgram_packing);
1870     }
1871 #endif /* MBEDTLS_SSL_PROTO_DTLS */
1872 
1873 #if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
1874     if ((ret = mbedtls_ssl_conf_max_frag_len(&conf, opt.mfl_code)) != 0) {
1875         mbedtls_printf(" failed\n  ! mbedtls_ssl_conf_max_frag_len returned %d\n\n",
1876                        ret);
1877         goto exit;
1878     }
1879 #endif
1880 
1881 #if defined(MBEDTLS_SSL_DTLS_SRTP)
1882     const mbedtls_ssl_srtp_profile forced_profile[] =
1883     { opt.force_srtp_profile, MBEDTLS_TLS_SRTP_UNSET };
1884     if (opt.use_srtp == 1) {
1885         if (opt.force_srtp_profile != 0) {
1886             ret = mbedtls_ssl_conf_dtls_srtp_protection_profiles(&conf, forced_profile);
1887         } else {
1888             ret = mbedtls_ssl_conf_dtls_srtp_protection_profiles(&conf, default_profiles);
1889         }
1890 
1891         if (ret != 0) {
1892             mbedtls_printf(" failed\n  ! "
1893                            "mbedtls_ssl_conf_dtls_srtp_protection_profiles returned %d\n\n",
1894                            ret);
1895             goto exit;
1896         }
1897 
1898     } else if (opt.force_srtp_profile != 0) {
1899         mbedtls_printf(" failed\n  ! must enable use_srtp to force srtp profile\n\n");
1900         goto exit;
1901     }
1902 #endif /* MBEDTLS_SSL_DTLS_SRTP */
1903 
1904 #if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
1905     if (opt.extended_ms != DFL_EXTENDED_MS) {
1906         mbedtls_ssl_conf_extended_master_secret(&conf, opt.extended_ms);
1907     }
1908 #endif
1909 
1910 #if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
1911     if (opt.etm != DFL_ETM) {
1912         mbedtls_ssl_conf_encrypt_then_mac(&conf, opt.etm);
1913     }
1914 #endif
1915 
1916 #if defined(MBEDTLS_DHM_C)
1917     if (opt.dhmlen != DFL_DHMLEN) {
1918         mbedtls_ssl_conf_dhm_min_bitlen(&conf, opt.dhmlen);
1919     }
1920 #endif
1921 
1922 #if defined(MBEDTLS_SSL_ALPN)
1923     if (opt.alpn_string != NULL) {
1924         if ((ret = mbedtls_ssl_conf_alpn_protocols(&conf, alpn_list)) != 0) {
1925             mbedtls_printf(" failed\n  ! mbedtls_ssl_conf_alpn_protocols returned %d\n\n",
1926                            ret);
1927             goto exit;
1928         }
1929     }
1930 #endif
1931 
1932     if (opt.reproducible) {
1933 #if defined(MBEDTLS_HAVE_TIME)
1934 #if defined(MBEDTLS_PLATFORM_TIME_ALT)
1935         mbedtls_platform_set_time(dummy_constant_time);
1936 #else
1937         fprintf(stderr, "Warning: reproducible option used without constant time\n");
1938 #endif
1939 #endif  /* MBEDTLS_HAVE_TIME */
1940     }
1941     mbedtls_ssl_conf_rng(&conf, rng_get, &rng);
1942     mbedtls_ssl_conf_dbg(&conf, my_debug, stdout);
1943 
1944     mbedtls_ssl_conf_read_timeout(&conf, opt.read_timeout);
1945 
1946 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
1947     mbedtls_ssl_conf_session_tickets(&conf, opt.tickets);
1948 #if defined(MBEDTLS_SSL_PROTO_TLS1_3)
1949     mbedtls_ssl_conf_tls13_enable_signal_new_session_tickets(
1950         &conf, opt.new_session_tickets);
1951 #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
1952 #endif /* MBEDTLS_SSL_SESSION_TICKETS */
1953 
1954     if (opt.force_ciphersuite[0] != DFL_FORCE_CIPHER) {
1955         mbedtls_ssl_conf_ciphersuites(&conf, opt.force_ciphersuite);
1956     }
1957 
1958 #if defined(MBEDTLS_SSL_PROTO_TLS1_3)
1959     mbedtls_ssl_conf_tls13_key_exchange_modes(&conf, opt.tls13_kex_modes);
1960 #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
1961 
1962     if (opt.allow_legacy != DFL_ALLOW_LEGACY) {
1963         mbedtls_ssl_conf_legacy_renegotiation(&conf, opt.allow_legacy);
1964     }
1965 #if defined(MBEDTLS_SSL_RENEGOTIATION)
1966     mbedtls_ssl_conf_renegotiation(&conf, opt.renegotiation);
1967 #endif
1968 
1969 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
1970     if (strcmp(opt.ca_path, "none") != 0 &&
1971         strcmp(opt.ca_file, "none") != 0) {
1972 #if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
1973         if (opt.ca_callback != 0) {
1974             mbedtls_ssl_conf_ca_cb(&conf, ca_callback, &cacert);
1975         } else
1976 #endif
1977         mbedtls_ssl_conf_ca_chain(&conf, &cacert, NULL);
1978     }
1979     if (strcmp(opt.crt_file, "none") != 0 &&
1980         strcmp(opt.key_file, "none") != 0) {
1981         if ((ret = mbedtls_ssl_conf_own_cert(&conf, &clicert, &pkey)) != 0) {
1982             mbedtls_printf(" failed\n  ! mbedtls_ssl_conf_own_cert returned %d\n\n",
1983                            ret);
1984             goto exit;
1985         }
1986     }
1987 #endif  /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
1988 
1989 #if defined(MBEDTLS_PK_HAVE_ECC_KEYS) || \
1990     (defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_SOME_EPHEMERAL_ENABLED) && \
1991     defined(PSA_WANT_ALG_FFDH))
1992     if (opt.groups != NULL &&
1993         strcmp(opt.groups, "default") != 0) {
1994         mbedtls_ssl_conf_groups(&conf, group_list);
1995     }
1996 #endif
1997 
1998 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
1999     if (opt.sig_algs != NULL) {
2000         mbedtls_ssl_conf_sig_algs(&conf, sig_alg_list);
2001     }
2002 #endif
2003 
2004 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_PSK_ENABLED)
2005 #if defined(MBEDTLS_USE_PSA_CRYPTO)
2006     if (opt.psk_opaque != 0) {
2007         key_attributes = psa_key_attributes_init();
2008         psa_set_key_usage_flags(&key_attributes, PSA_KEY_USAGE_DERIVE);
2009         psa_set_key_algorithm(&key_attributes, alg);
2010         psa_set_key_type(&key_attributes, PSA_KEY_TYPE_DERIVE);
2011 
2012         status = psa_import_key(&key_attributes, psk, psk_len, &slot);
2013         if (status != PSA_SUCCESS) {
2014             ret = MBEDTLS_ERR_SSL_HW_ACCEL_FAILED;
2015             goto exit;
2016         }
2017 
2018         if ((ret = mbedtls_ssl_conf_psk_opaque(&conf, slot,
2019                                                (const unsigned char *) opt.psk_identity,
2020                                                strlen(opt.psk_identity))) != 0) {
2021             mbedtls_printf(" failed\n  ! mbedtls_ssl_conf_psk_opaque returned %d\n\n",
2022                            ret);
2023             goto exit;
2024         }
2025     } else
2026 #endif /* MBEDTLS_USE_PSA_CRYPTO */
2027     if (psk_len > 0) {
2028         ret = mbedtls_ssl_conf_psk(&conf, psk, psk_len,
2029                                    (const unsigned char *) opt.psk_identity,
2030                                    strlen(opt.psk_identity));
2031         if (ret != 0) {
2032             mbedtls_printf(" failed\n  ! mbedtls_ssl_conf_psk returned %d\n\n", ret);
2033             goto exit;
2034         }
2035     }
2036 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_PSK_ENABLED */
2037 
2038     if (opt.min_version != DFL_MIN_VERSION) {
2039         mbedtls_ssl_conf_min_tls_version(&conf, opt.min_version);
2040     }
2041 
2042     if (opt.max_version != DFL_MAX_VERSION) {
2043         mbedtls_ssl_conf_max_tls_version(&conf, opt.max_version);
2044     }
2045 
2046 #if defined(MBEDTLS_SSL_EARLY_DATA)
2047     if (opt.early_data != DFL_EARLY_DATA) {
2048         mbedtls_ssl_conf_early_data(&conf, opt.early_data);
2049     }
2050 #endif /* MBEDTLS_SSL_EARLY_DATA */
2051 
2052     if ((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0) {
2053         mbedtls_printf(" failed\n  ! mbedtls_ssl_setup returned -0x%x\n\n",
2054                        (unsigned int) -ret);
2055         goto exit;
2056     }
2057 
2058     if (opt.eap_tls != 0) {
2059         mbedtls_ssl_set_export_keys_cb(&ssl, eap_tls_key_derivation,
2060                                        &eap_tls_keying);
2061     } else if (opt.nss_keylog != 0) {
2062         mbedtls_ssl_set_export_keys_cb(&ssl,
2063                                        nss_keylog_export,
2064                                        NULL);
2065     }
2066 #if defined(MBEDTLS_SSL_DTLS_SRTP)
2067     else if (opt.use_srtp != 0) {
2068         mbedtls_ssl_set_export_keys_cb(&ssl, dtls_srtp_key_derivation,
2069                                        &dtls_srtp_keying);
2070     }
2071 #endif /* MBEDTLS_SSL_DTLS_SRTP */
2072 
2073 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
2074     if ((ret = mbedtls_ssl_set_hostname(&ssl, opt.server_name)) != 0) {
2075         mbedtls_printf(" failed\n  ! mbedtls_ssl_set_hostname returned %d\n\n",
2076                        ret);
2077         goto exit;
2078     }
2079 #endif
2080 
2081 #if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
2082     if (opt.ecjpake_pw != DFL_ECJPAKE_PW) {
2083 #if defined(MBEDTLS_USE_PSA_CRYPTO)
2084         if (opt.ecjpake_pw_opaque != DFL_ECJPAKE_PW_OPAQUE) {
2085             psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
2086 
2087             psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DERIVE);
2088             psa_set_key_algorithm(&attributes, PSA_ALG_JPAKE);
2089             psa_set_key_type(&attributes, PSA_KEY_TYPE_PASSWORD);
2090 
2091             status = psa_import_key(&attributes,
2092                                     (const unsigned char *) opt.ecjpake_pw,
2093                                     strlen(opt.ecjpake_pw),
2094                                     &ecjpake_pw_slot);
2095             if (status != PSA_SUCCESS) {
2096                 mbedtls_printf(" failed\n  ! psa_import_key returned %d\n\n",
2097                                status);
2098                 goto exit;
2099             }
2100             if ((ret = mbedtls_ssl_set_hs_ecjpake_password_opaque(&ssl,
2101                                                                   ecjpake_pw_slot)) != 0) {
2102                 mbedtls_printf(
2103                     " failed\n  ! mbedtls_ssl_set_hs_ecjpake_password_opaque returned %d\n\n",
2104                     ret);
2105                 goto exit;
2106             }
2107             mbedtls_printf("using opaque password\n");
2108         } else
2109 #endif  /* MBEDTLS_USE_PSA_CRYPTO */
2110         {
2111             if ((ret = mbedtls_ssl_set_hs_ecjpake_password(&ssl,
2112                                                            (const unsigned char *) opt.ecjpake_pw,
2113                                                            strlen(opt.ecjpake_pw))) != 0) {
2114                 mbedtls_printf(" failed\n  ! mbedtls_ssl_set_hs_ecjpake_password returned %d\n\n",
2115                                ret);
2116                 goto exit;
2117             }
2118         }
2119     }
2120 #endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
2121 
2122 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
2123     if (opt.context_crt_cb == 1) {
2124         mbedtls_ssl_set_verify(&ssl, my_verify, NULL);
2125     }
2126 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
2127 
2128     io_ctx.ssl = &ssl;
2129     io_ctx.net = &server_fd;
2130     mbedtls_ssl_set_bio(&ssl, &io_ctx, send_cb, recv_cb,
2131                         opt.nbio == 0 ? recv_timeout_cb : NULL);
2132 
2133 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
2134     if (opt.transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM) {
2135         if ((ret = mbedtls_ssl_set_cid(&ssl, opt.cid_enabled,
2136                                        cid, cid_len)) != 0) {
2137             mbedtls_printf(" failed\n  ! mbedtls_ssl_set_cid returned %d\n\n",
2138                            ret);
2139             goto exit;
2140         }
2141     }
2142 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
2143 
2144 #if defined(MBEDTLS_SSL_PROTO_DTLS)
2145     if (opt.dtls_mtu != DFL_DTLS_MTU) {
2146         mbedtls_ssl_set_mtu(&ssl, opt.dtls_mtu);
2147     }
2148 #endif
2149 
2150 #if defined(MBEDTLS_TIMING_C)
2151     mbedtls_ssl_set_timer_cb(&ssl, &timer, mbedtls_timing_set_delay,
2152                              mbedtls_timing_get_delay);
2153 #endif
2154 
2155 #if defined(MBEDTLS_ECP_RESTARTABLE)
2156     if (opt.ec_max_ops != DFL_EC_MAX_OPS) {
2157         mbedtls_ecp_set_max_ops(opt.ec_max_ops);
2158     }
2159 #endif
2160 
2161 #if defined(MBEDTLS_SSL_DTLS_SRTP)
2162     if (opt.use_srtp != 0 && strlen(opt.mki) != 0) {
2163         if (mbedtls_test_unhexify(mki, sizeof(mki),
2164                                   opt.mki, &mki_len) != 0) {
2165             mbedtls_printf("mki value not valid hex\n");
2166             goto exit;
2167         }
2168 
2169         mbedtls_ssl_conf_srtp_mki_value_supported(&conf, MBEDTLS_SSL_DTLS_SRTP_MKI_SUPPORTED);
2170         if ((ret = mbedtls_ssl_dtls_srtp_set_mki_value(&ssl, mki,
2171                                                        (uint16_t) strlen(opt.mki) / 2)) != 0) {
2172             mbedtls_printf(" failed\n  ! mbedtls_ssl_dtls_srtp_set_mki_value returned %d\n\n", ret);
2173             goto exit;
2174         }
2175     }
2176 #endif
2177 
2178     mbedtls_printf(" ok\n");
2179 
2180     /*
2181      * 3. Start the connection
2182      */
2183     if (opt.server_addr == NULL) {
2184         opt.server_addr = opt.server_name;
2185     }
2186 
2187     mbedtls_printf("  . Connecting to %s/%s/%s...",
2188                    opt.transport == MBEDTLS_SSL_TRANSPORT_STREAM ? "tcp" : "udp",
2189                    opt.server_addr, opt.server_port);
2190     fflush(stdout);
2191 
2192     if ((ret = mbedtls_net_connect(&server_fd,
2193                                    opt.server_addr, opt.server_port,
2194                                    opt.transport == MBEDTLS_SSL_TRANSPORT_STREAM ?
2195                                    MBEDTLS_NET_PROTO_TCP : MBEDTLS_NET_PROTO_UDP)) != 0) {
2196         mbedtls_printf(" failed\n  ! mbedtls_net_connect returned -0x%x\n\n",
2197                        (unsigned int) -ret);
2198         goto exit;
2199     }
2200 
2201     if (opt.nbio > 0) {
2202         ret = mbedtls_net_set_nonblock(&server_fd);
2203     } else {
2204         ret = mbedtls_net_set_block(&server_fd);
2205     }
2206     if (ret != 0) {
2207         mbedtls_printf(" failed\n  ! net_set_(non)block() returned -0x%x\n\n",
2208                        (unsigned int) -ret);
2209         goto exit;
2210     }
2211 
2212     mbedtls_printf(" ok\n");
2213 
2214     /*
2215      * 4. Handshake
2216      */
2217     mbedtls_printf("  . Performing the SSL/TLS handshake...");
2218     fflush(stdout);
2219 
2220     while ((ret = mbedtls_ssl_handshake(&ssl)) != 0) {
2221         if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
2222             ret != MBEDTLS_ERR_SSL_WANT_WRITE &&
2223             ret != MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) {
2224             mbedtls_printf(" failed\n  ! mbedtls_ssl_handshake returned -0x%x\n",
2225                            (unsigned int) -ret);
2226 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
2227             if (ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED ||
2228                 ret == MBEDTLS_ERR_SSL_BAD_CERTIFICATE) {
2229                 mbedtls_printf(
2230                     "    Unable to verify the server's certificate. "
2231                     "Either it is invalid,\n"
2232                     "    or you didn't set ca_file or ca_path "
2233                     "to an appropriate value.\n"
2234                     "    Alternatively, you may want to use "
2235                     "auth_mode=optional for testing purposes if "
2236                     "not using TLS 1.3.\n"
2237                     "    For TLS 1.3 server, try `ca_path=/etc/ssl/certs/`"
2238                     "or other folder that has root certificates\n");
2239 
2240                 flags = mbedtls_ssl_get_verify_result(&ssl);
2241                 char vrfy_buf[512];
2242                 x509_crt_verify_info(vrfy_buf, sizeof(vrfy_buf), "  ! ", flags);
2243                 mbedtls_printf("%s\n", vrfy_buf);
2244             }
2245 #endif
2246             mbedtls_printf("\n");
2247             goto exit;
2248         }
2249 
2250 #if defined(MBEDTLS_ECP_RESTARTABLE)
2251         if (ret == MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) {
2252             continue;
2253         }
2254 #endif
2255 
2256         /* For event-driven IO, wait for socket to become available */
2257         if (opt.event == 1 /* level triggered IO */) {
2258 #if defined(MBEDTLS_TIMING_C)
2259             ret = idle(&server_fd, &timer, ret);
2260 #else
2261             ret = idle(&server_fd, ret);
2262 #endif
2263             if (ret != 0) {
2264                 goto exit;
2265             }
2266         }
2267     }
2268 
2269     {
2270         int suite_id = mbedtls_ssl_get_ciphersuite_id_from_ssl(&ssl);
2271         const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
2272         ciphersuite_info = mbedtls_ssl_ciphersuite_from_id(suite_id);
2273 
2274         mbedtls_printf(" ok\n    [ Protocol is %s ]\n"
2275                        "    [ Ciphersuite is %s ]\n"
2276                        "    [ Key size is %u ]\n",
2277                        mbedtls_ssl_get_version(&ssl),
2278                        mbedtls_ssl_ciphersuite_get_name(ciphersuite_info),
2279                        (unsigned int)
2280                        mbedtls_ssl_ciphersuite_get_cipher_key_bitlen(ciphersuite_info));
2281     }
2282 
2283     if ((ret = mbedtls_ssl_get_record_expansion(&ssl)) >= 0) {
2284         mbedtls_printf("    [ Record expansion is %d ]\n", ret);
2285     } else {
2286         mbedtls_printf("    [ Record expansion is unknown ]\n");
2287     }
2288 
2289 #if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
2290     mbedtls_printf("    [ Maximum incoming record payload length is %u ]\n",
2291                    (unsigned int) mbedtls_ssl_get_max_in_record_payload(&ssl));
2292     mbedtls_printf("    [ Maximum outgoing record payload length is %u ]\n",
2293                    (unsigned int) mbedtls_ssl_get_max_out_record_payload(&ssl));
2294 #endif
2295 
2296 #if defined(MBEDTLS_SSL_ALPN)
2297     if (opt.alpn_string != NULL) {
2298         const char *alp = mbedtls_ssl_get_alpn_protocol(&ssl);
2299         mbedtls_printf("    [ Application Layer Protocol is %s ]\n",
2300                        alp ? alp : "(none)");
2301     }
2302 #endif
2303 
2304     if (opt.eap_tls != 0) {
2305         size_t j = 0;
2306 
2307         if ((ret = mbedtls_ssl_tls_prf(eap_tls_keying.tls_prf_type,
2308                                        eap_tls_keying.master_secret,
2309                                        sizeof(eap_tls_keying.master_secret),
2310                                        eap_tls_label,
2311                                        eap_tls_keying.randbytes,
2312                                        sizeof(eap_tls_keying.randbytes),
2313                                        eap_tls_keymaterial,
2314                                        sizeof(eap_tls_keymaterial)))
2315             != 0) {
2316             mbedtls_printf(" failed\n  ! mbedtls_ssl_tls_prf returned -0x%x\n\n",
2317                            (unsigned int) -ret);
2318             goto exit;
2319         }
2320 
2321         mbedtls_printf("    EAP-TLS key material is:");
2322         for (j = 0; j < sizeof(eap_tls_keymaterial); j++) {
2323             if (j % 8 == 0) {
2324                 mbedtls_printf("\n    ");
2325             }
2326             mbedtls_printf("%02x ", eap_tls_keymaterial[j]);
2327         }
2328         mbedtls_printf("\n");
2329 
2330         if ((ret = mbedtls_ssl_tls_prf(eap_tls_keying.tls_prf_type, NULL, 0,
2331                                        eap_tls_label,
2332                                        eap_tls_keying.randbytes,
2333                                        sizeof(eap_tls_keying.randbytes),
2334                                        eap_tls_iv,
2335                                        sizeof(eap_tls_iv))) != 0) {
2336             mbedtls_printf(" failed\n  ! mbedtls_ssl_tls_prf returned -0x%x\n\n",
2337                            (unsigned int) -ret);
2338             goto exit;
2339         }
2340 
2341         mbedtls_printf("    EAP-TLS IV is:");
2342         for (j = 0; j < sizeof(eap_tls_iv); j++) {
2343             if (j % 8 == 0) {
2344                 mbedtls_printf("\n    ");
2345             }
2346             mbedtls_printf("%02x ", eap_tls_iv[j]);
2347         }
2348         mbedtls_printf("\n");
2349     }
2350 
2351 #if defined(MBEDTLS_SSL_DTLS_SRTP)
2352     else if (opt.use_srtp != 0) {
2353         size_t j = 0;
2354         mbedtls_dtls_srtp_info dtls_srtp_negotiation_result;
2355         mbedtls_ssl_get_dtls_srtp_negotiation_result(&ssl, &dtls_srtp_negotiation_result);
2356 
2357         if (dtls_srtp_negotiation_result.chosen_dtls_srtp_profile
2358             == MBEDTLS_TLS_SRTP_UNSET) {
2359             mbedtls_printf("    Unable to negotiate "
2360                            "the use of DTLS-SRTP\n");
2361         } else {
2362             if ((ret = mbedtls_ssl_tls_prf(dtls_srtp_keying.tls_prf_type,
2363                                            dtls_srtp_keying.master_secret,
2364                                            sizeof(dtls_srtp_keying.master_secret),
2365                                            dtls_srtp_label,
2366                                            dtls_srtp_keying.randbytes,
2367                                            sizeof(dtls_srtp_keying.randbytes),
2368                                            dtls_srtp_key_material,
2369                                            sizeof(dtls_srtp_key_material)))
2370                 != 0) {
2371                 mbedtls_printf(" failed\n  ! mbedtls_ssl_tls_prf returned -0x%x\n\n",
2372                                (unsigned int) -ret);
2373                 goto exit;
2374             }
2375 
2376             mbedtls_printf("    DTLS-SRTP key material is:");
2377             for (j = 0; j < sizeof(dtls_srtp_key_material); j++) {
2378                 if (j % 8 == 0) {
2379                     mbedtls_printf("\n    ");
2380                 }
2381                 mbedtls_printf("%02x ", dtls_srtp_key_material[j]);
2382             }
2383             mbedtls_printf("\n");
2384 
2385             /* produce a less readable output used to perform automatic checks
2386              * - compare client and server output
2387              * - interop test with openssl which client produces this kind of output
2388              */
2389             mbedtls_printf("    Keying material: ");
2390             for (j = 0; j < sizeof(dtls_srtp_key_material); j++) {
2391                 mbedtls_printf("%02X", dtls_srtp_key_material[j]);
2392             }
2393             mbedtls_printf("\n");
2394 
2395             if (dtls_srtp_negotiation_result.mki_len > 0) {
2396                 mbedtls_printf("    DTLS-SRTP mki value: ");
2397                 for (j = 0; j < dtls_srtp_negotiation_result.mki_len; j++) {
2398                     mbedtls_printf("%02X", dtls_srtp_negotiation_result.mki_value[j]);
2399                 }
2400             } else {
2401                 mbedtls_printf("    DTLS-SRTP no mki value negotiated");
2402             }
2403             mbedtls_printf("\n");
2404         }
2405     }
2406 #endif /* MBEDTLS_SSL_DTLS_SRTP */
2407     if (opt.reconnect != 0 && ssl.tls_version != MBEDTLS_SSL_VERSION_TLS1_3) {
2408         mbedtls_printf("  . Saving session for reuse...");
2409         fflush(stdout);
2410 
2411         if (opt.reco_mode == 1) {
2412             if ((ret = ssl_save_session_serialize(&ssl,
2413                                                   &session_data, &session_data_len)) != 0) {
2414                 mbedtls_printf(" failed\n  ! ssl_save_session_serialize returned -0x%04x\n\n",
2415                                (unsigned int) -ret);
2416                 goto exit;
2417             }
2418 
2419         } else {
2420             if ((ret = mbedtls_ssl_get_session(&ssl, &saved_session)) != 0) {
2421                 mbedtls_printf(" failed\n  ! mbedtls_ssl_get_session returned -0x%x\n\n",
2422                                (unsigned int) -ret);
2423                 goto exit;
2424             }
2425         }
2426 
2427         mbedtls_printf(" ok\n");
2428 
2429         if (opt.reco_mode == 1) {
2430             mbedtls_printf("    [ Saved %u bytes of session data]\n",
2431                            (unsigned) session_data_len);
2432         }
2433     }
2434 
2435 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
2436     /*
2437      * 5. Verify the server certificate
2438      */
2439     mbedtls_printf("  . Verifying peer X.509 certificate...");
2440 
2441     if ((flags = mbedtls_ssl_get_verify_result(&ssl)) != 0) {
2442         char vrfy_buf[512];
2443         mbedtls_printf(" failed\n");
2444 
2445         x509_crt_verify_info(vrfy_buf, sizeof(vrfy_buf),
2446                              "  ! ", flags);
2447 
2448         mbedtls_printf("%s\n", vrfy_buf);
2449     } else {
2450         mbedtls_printf(" ok\n");
2451     }
2452 
2453 #if !defined(MBEDTLS_X509_REMOVE_INFO)
2454     mbedtls_printf("  . Peer certificate information    ...\n");
2455     mbedtls_printf("%s\n", peer_crt_info);
2456 #endif /* !MBEDTLS_X509_REMOVE_INFO */
2457 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
2458 
2459 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
2460     ret = report_cid_usage(&ssl, "initial handshake");
2461     if (ret != 0) {
2462         goto exit;
2463     }
2464 
2465     if (opt.transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM) {
2466         if ((ret = mbedtls_ssl_set_cid(&ssl, opt.cid_enabled_renego,
2467                                        cid_renego,
2468                                        cid_renego_len)) != 0) {
2469             mbedtls_printf(" failed\n  ! mbedtls_ssl_set_cid returned %d\n\n",
2470                            ret);
2471             goto exit;
2472         }
2473     }
2474 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
2475 
2476 #if defined(MBEDTLS_SSL_RENEGOTIATION)
2477     if (opt.renegotiate) {
2478         /*
2479          * Perform renegotiation (this must be done when the server is waiting
2480          * for input from our side).
2481          */
2482         mbedtls_printf("  . Performing renegotiation...");
2483         fflush(stdout);
2484         while ((ret = mbedtls_ssl_renegotiate(&ssl)) != 0) {
2485             if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
2486                 ret != MBEDTLS_ERR_SSL_WANT_WRITE &&
2487                 ret != MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) {
2488                 mbedtls_printf(" failed\n  ! mbedtls_ssl_renegotiate returned %d\n\n",
2489                                ret);
2490                 goto exit;
2491             }
2492 
2493 #if defined(MBEDTLS_ECP_RESTARTABLE)
2494             if (ret == MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) {
2495                 continue;
2496             }
2497 #endif
2498 
2499             /* For event-driven IO, wait for socket to become available */
2500             if (opt.event == 1 /* level triggered IO */) {
2501 #if defined(MBEDTLS_TIMING_C)
2502                 idle(&server_fd, &timer, ret);
2503 #else
2504                 idle(&server_fd, ret);
2505 #endif
2506             }
2507 
2508         }
2509         mbedtls_printf(" ok\n");
2510     }
2511 #endif /* MBEDTLS_SSL_RENEGOTIATION */
2512 
2513 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
2514     ret = report_cid_usage(&ssl, "after renegotiation");
2515     if (ret != 0) {
2516         goto exit;
2517     }
2518 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
2519 
2520     /*
2521      * 6. Write the GET request
2522      */
2523     retry_left = opt.max_resend;
2524 send_request:
2525     mbedtls_printf("  > Write to server:");
2526     fflush(stdout);
2527 
2528     ret = build_http_request(buf, sizeof(buf) - 1, &len);
2529     if (ret != 0) {
2530         goto exit;
2531     }
2532 
2533     if (opt.transport == MBEDTLS_SSL_TRANSPORT_STREAM) {
2534         written = 0;
2535         frags = 0;
2536 
2537         do {
2538             while ((ret = mbedtls_ssl_write(&ssl, buf + written,
2539                                             len - written)) < 0) {
2540                 if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
2541                     ret != MBEDTLS_ERR_SSL_WANT_WRITE &&
2542                     ret != MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) {
2543                     mbedtls_printf(" failed\n  ! mbedtls_ssl_write returned -0x%x\n\n",
2544                                    (unsigned int) -ret);
2545                     goto exit;
2546                 }
2547 
2548                 /* For event-driven IO, wait for socket to become available */
2549                 if (opt.event == 1 /* level triggered IO */) {
2550 #if defined(MBEDTLS_TIMING_C)
2551                     idle(&server_fd, &timer, ret);
2552 #else
2553                     idle(&server_fd, ret);
2554 #endif
2555                 }
2556             }
2557 
2558             frags++;
2559             written += ret;
2560         } while (written < len);
2561     } else { /* Not stream, so datagram */
2562         while (1) {
2563             ret = mbedtls_ssl_write(&ssl, buf, len);
2564 
2565 #if defined(MBEDTLS_ECP_RESTARTABLE)
2566             if (ret == MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) {
2567                 continue;
2568             }
2569 #endif
2570 
2571             if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
2572                 ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
2573                 break;
2574             }
2575 
2576             /* For event-driven IO, wait for socket to become available */
2577             if (opt.event == 1 /* level triggered IO */) {
2578 #if defined(MBEDTLS_TIMING_C)
2579                 idle(&server_fd, &timer, ret);
2580 #else
2581                 idle(&server_fd, ret);
2582 #endif
2583             }
2584         }
2585 
2586         if (ret < 0) {
2587             mbedtls_printf(" failed\n  ! mbedtls_ssl_write returned %d\n\n",
2588                            ret);
2589             goto exit;
2590         }
2591 
2592         frags = 1;
2593         written = ret;
2594 
2595         if (written < len) {
2596             mbedtls_printf(" warning\n  ! request didn't fit into single datagram and "
2597                            "was truncated to size %u", (unsigned) written);
2598         }
2599     }
2600 
2601     buf[written] = '\0';
2602     mbedtls_printf(
2603         " %" MBEDTLS_PRINTF_SIZET " bytes written in %" MBEDTLS_PRINTF_SIZET " fragments\n\n%s\n",
2604         written,
2605         frags,
2606         (char *) buf);
2607 
2608     /* Send a non-empty request if request_size == 0 */
2609     if (len == 0) {
2610         opt.request_size = DFL_REQUEST_SIZE;
2611         goto send_request;
2612     }
2613 
2614     /*
2615      * 7. Read the HTTP response
2616      */
2617 
2618     /*
2619      * TLS and DTLS need different reading styles (stream vs datagram)
2620      */
2621     if (opt.transport == MBEDTLS_SSL_TRANSPORT_STREAM) {
2622 #if defined(MBEDTLS_SSL_PROTO_TLS1_3) && defined(MBEDTLS_SSL_SESSION_TICKETS)
2623         int ticket_id = 0;
2624 #endif
2625         do {
2626             len = sizeof(buf) - 1;
2627             memset(buf, 0, sizeof(buf));
2628             ret = mbedtls_ssl_read(&ssl, buf, len);
2629 
2630 #if defined(MBEDTLS_ECP_RESTARTABLE)
2631             if (ret == MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) {
2632                 continue;
2633             }
2634 #endif
2635 
2636             if (ret == MBEDTLS_ERR_SSL_WANT_READ ||
2637                 ret == MBEDTLS_ERR_SSL_WANT_WRITE) {
2638                 /* For event-driven IO, wait for socket to become available */
2639                 if (opt.event == 1 /* level triggered IO */) {
2640 #if defined(MBEDTLS_TIMING_C)
2641                     idle(&server_fd, &timer, ret);
2642 #else
2643                     idle(&server_fd, ret);
2644 #endif
2645                 }
2646                 continue;
2647             }
2648 
2649             if (ret <= 0) {
2650                 switch (ret) {
2651                     case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
2652                         mbedtls_printf(" connection was closed gracefully\n");
2653                         ret = 0;
2654                         goto close_notify;
2655 
2656                     case 0:
2657                     case MBEDTLS_ERR_NET_CONN_RESET:
2658                         mbedtls_printf(" connection was reset by peer\n");
2659                         ret = 0;
2660                         goto reconnect;
2661 
2662 #if defined(MBEDTLS_SSL_PROTO_TLS1_3)
2663 
2664 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
2665                     case MBEDTLS_ERR_SSL_RECEIVED_NEW_SESSION_TICKET:
2666                         /* We were waiting for application data but got
2667                          * a NewSessionTicket instead. */
2668                         mbedtls_printf(" got new session ticket ( %d ).\n",
2669                                        ticket_id++);
2670                         if (opt.reconnect != 0) {
2671                             mbedtls_printf("  . Saving session for reuse...");
2672                             fflush(stdout);
2673 
2674                             if (opt.reco_mode == 1) {
2675                                 if ((ret = ssl_save_session_serialize(&ssl,
2676                                                                       &session_data,
2677                                                                       &session_data_len)) != 0) {
2678                                     mbedtls_printf(
2679                                         " failed\n  ! ssl_save_session_serialize returned -0x%04x\n\n",
2680                                         (unsigned int) -ret);
2681                                     goto exit;
2682                                 }
2683                             } else {
2684                                 if ((ret = mbedtls_ssl_get_session(&ssl, &saved_session)) != 0) {
2685                                     mbedtls_printf(
2686                                         " failed\n  ! mbedtls_ssl_get_session returned -0x%x\n\n",
2687                                         (unsigned int) -ret);
2688                                     goto exit;
2689                                 }
2690                             }
2691 
2692                             mbedtls_printf(" ok\n");
2693 
2694                             if (opt.reco_mode == 1) {
2695                                 mbedtls_printf("    [ Saved %u bytes of session data]\n",
2696                                                (unsigned) session_data_len);
2697                             }
2698                         }
2699                         continue;
2700 #endif /* MBEDTLS_SSL_SESSION_TICKETS */
2701 
2702 #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
2703 
2704                     default:
2705                         mbedtls_printf(" mbedtls_ssl_read returned -0x%x\n",
2706                                        (unsigned int) -ret);
2707                         goto exit;
2708                 }
2709             }
2710 
2711             len = ret;
2712             buf[len] = '\0';
2713             mbedtls_printf("  < Read from server: %" MBEDTLS_PRINTF_SIZET " bytes read\n\n%s",
2714                            len,
2715                            (char *) buf);
2716             fflush(stdout);
2717             /* End of message should be detected according to the syntax of the
2718              * application protocol (eg HTTP), just use a dummy test here. */
2719             if (ret > 0 && buf[len-1] == '\n') {
2720                 ret = 0;
2721                 break;
2722             }
2723         } while (1);
2724     } else { /* Not stream, so datagram */
2725         len = sizeof(buf) - 1;
2726         memset(buf, 0, sizeof(buf));
2727 
2728         while (1) {
2729             ret = mbedtls_ssl_read(&ssl, buf, len);
2730 
2731 #if defined(MBEDTLS_ECP_RESTARTABLE)
2732             if (ret == MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) {
2733                 continue;
2734             }
2735 #endif
2736 
2737             if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
2738                 ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
2739                 break;
2740             }
2741 
2742             /* For event-driven IO, wait for socket to become available */
2743             if (opt.event == 1 /* level triggered IO */) {
2744 #if defined(MBEDTLS_TIMING_C)
2745                 idle(&server_fd, &timer, ret);
2746 #else
2747                 idle(&server_fd, ret);
2748 #endif
2749             }
2750         }
2751 
2752         if (ret <= 0) {
2753             switch (ret) {
2754                 case MBEDTLS_ERR_SSL_TIMEOUT:
2755                     mbedtls_printf(" timeout\n");
2756                     if (retry_left-- > 0) {
2757                         goto send_request;
2758                     }
2759                     goto exit;
2760 
2761                 case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
2762                     mbedtls_printf(" connection was closed gracefully\n");
2763                     ret = 0;
2764                     goto close_notify;
2765 
2766                 default:
2767                     mbedtls_printf(" mbedtls_ssl_read returned -0x%x\n", (unsigned int) -ret);
2768                     goto exit;
2769             }
2770         }
2771 
2772         len = ret;
2773         buf[len] = '\0';
2774         mbedtls_printf("  < Read from server: %" MBEDTLS_PRINTF_SIZET " bytes read\n\n%s",
2775                        len,
2776                        (char *) buf);
2777         ret = 0;
2778     }
2779 
2780     /*
2781      * 7b. Simulate hard reset and reconnect from same port?
2782      */
2783     if (opt.reconnect_hard != 0) {
2784         opt.reconnect_hard = 0;
2785 
2786         mbedtls_printf("  . Restarting connection from same port...");
2787         fflush(stdout);
2788 
2789 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
2790         memset(peer_crt_info, 0, sizeof(peer_crt_info));
2791 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
2792 
2793         if ((ret = mbedtls_ssl_session_reset(&ssl)) != 0) {
2794             mbedtls_printf(" failed\n  ! mbedtls_ssl_session_reset returned -0x%x\n\n",
2795                            (unsigned int) -ret);
2796             goto exit;
2797         }
2798 
2799         while ((ret = mbedtls_ssl_handshake(&ssl)) != 0) {
2800             if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
2801                 ret != MBEDTLS_ERR_SSL_WANT_WRITE &&
2802                 ret != MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) {
2803                 mbedtls_printf(" failed\n  ! mbedtls_ssl_handshake returned -0x%x\n\n",
2804                                (unsigned int) -ret);
2805                 goto exit;
2806             }
2807 
2808             /* For event-driven IO, wait for socket to become available */
2809             if (opt.event == 1 /* level triggered IO */) {
2810 #if defined(MBEDTLS_TIMING_C)
2811                 idle(&server_fd, &timer, ret);
2812 #else
2813                 idle(&server_fd, ret);
2814 #endif
2815             }
2816         }
2817 
2818         mbedtls_printf(" ok\n");
2819 
2820         goto send_request;
2821     }
2822 
2823     /*
2824      * 7c. Simulate serialize/deserialize and go back to data exchange
2825      */
2826 #if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION)
2827     if (opt.serialize != 0) {
2828         size_t buf_len;
2829 
2830         mbedtls_printf("  . Serializing live connection...");
2831 
2832         ret = mbedtls_ssl_context_save(&ssl, NULL, 0, &buf_len);
2833         if (ret != MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL) {
2834             mbedtls_printf(" failed\n  ! mbedtls_ssl_context_save returned "
2835                            "-0x%x\n\n", (unsigned int) -ret);
2836 
2837             goto exit;
2838         }
2839 
2840         if ((context_buf = mbedtls_calloc(1, buf_len)) == NULL) {
2841             mbedtls_printf(" failed\n  ! Couldn't allocate buffer for "
2842                            "serialized context");
2843 
2844             goto exit;
2845         }
2846         context_buf_len = buf_len;
2847 
2848         if ((ret = mbedtls_ssl_context_save(&ssl, context_buf,
2849                                             buf_len, &buf_len)) != 0) {
2850             mbedtls_printf(" failed\n  ! mbedtls_ssl_context_save returned "
2851                            "-0x%x\n\n", (unsigned int) -ret);
2852 
2853             goto exit;
2854         }
2855 
2856         mbedtls_printf(" ok\n");
2857 
2858         /* Save serialized context to the 'opt.context_file' as a base64 code */
2859         if (0 < strlen(opt.context_file)) {
2860             FILE *b64_file;
2861             uint8_t *b64_buf;
2862             size_t b64_len;
2863 
2864             mbedtls_printf("  . Save serialized context to a file... ");
2865 
2866             mbedtls_base64_encode(NULL, 0, &b64_len, context_buf, buf_len);
2867 
2868             if ((b64_buf = mbedtls_calloc(1, b64_len)) == NULL) {
2869                 mbedtls_printf("failed\n  ! Couldn't allocate buffer for "
2870                                "the base64 code\n");
2871                 goto exit;
2872             }
2873 
2874             if ((ret = mbedtls_base64_encode(b64_buf, b64_len, &b64_len,
2875                                              context_buf, buf_len)) != 0) {
2876                 mbedtls_printf("failed\n  ! mbedtls_base64_encode returned "
2877                                "-0x%x\n", (unsigned int) -ret);
2878                 mbedtls_free(b64_buf);
2879                 goto exit;
2880             }
2881 
2882             if ((b64_file = fopen(opt.context_file, "w")) == NULL) {
2883                 mbedtls_printf("failed\n  ! Cannot open '%s' for writing.\n",
2884                                opt.context_file);
2885                 mbedtls_free(b64_buf);
2886                 goto exit;
2887             }
2888 
2889             if (b64_len != fwrite(b64_buf, 1, b64_len, b64_file)) {
2890                 mbedtls_printf("failed\n  ! fwrite(%ld bytes) failed\n",
2891                                (long) b64_len);
2892                 mbedtls_free(b64_buf);
2893                 fclose(b64_file);
2894                 goto exit;
2895             }
2896 
2897             mbedtls_free(b64_buf);
2898             fclose(b64_file);
2899 
2900             mbedtls_printf("ok\n");
2901         }
2902 
2903         if (opt.serialize == 1) {
2904             /* nothing to do here, done by context_save() already */
2905             mbedtls_printf("  . Context has been reset... ok\n");
2906         }
2907 
2908         if (opt.serialize == 2) {
2909             mbedtls_printf("  . Freeing and reinitializing context...");
2910 
2911             mbedtls_ssl_free(&ssl);
2912 
2913             mbedtls_ssl_init(&ssl);
2914 
2915             if ((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0) {
2916                 mbedtls_printf(" failed\n  ! mbedtls_ssl_setup returned "
2917                                "-0x%x\n\n", (unsigned int) -ret);
2918                 goto exit;
2919             }
2920 
2921             if (opt.nbio == 2) {
2922                 mbedtls_ssl_set_bio(&ssl, &server_fd, delayed_send,
2923                                     delayed_recv, NULL);
2924             } else {
2925                 mbedtls_ssl_set_bio(&ssl, &server_fd, mbedtls_net_send,
2926                                     mbedtls_net_recv,
2927                                     opt.nbio == 0 ? mbedtls_net_recv_timeout : NULL);
2928             }
2929 
2930 #if defined(MBEDTLS_TIMING_C)
2931             mbedtls_ssl_set_timer_cb(&ssl, &timer,
2932                                      mbedtls_timing_set_delay,
2933                                      mbedtls_timing_get_delay);
2934 #endif /* MBEDTLS_TIMING_C */
2935 
2936             mbedtls_printf(" ok\n");
2937         }
2938 
2939         mbedtls_printf("  . Deserializing connection...");
2940 
2941         if ((ret = mbedtls_ssl_context_load(&ssl, context_buf,
2942                                             buf_len)) != 0) {
2943             mbedtls_printf("failed\n  ! mbedtls_ssl_context_load returned "
2944                            "-0x%x\n\n", (unsigned int) -ret);
2945 
2946             goto exit;
2947         }
2948 
2949         mbedtls_free(context_buf);
2950         context_buf = NULL;
2951         context_buf_len = 0;
2952 
2953         mbedtls_printf(" ok\n");
2954     }
2955 #endif /* MBEDTLS_SSL_CONTEXT_SERIALIZATION */
2956 
2957     /*
2958      * 7d. Continue doing data exchanges?
2959      */
2960     if (--opt.exchanges > 0) {
2961         goto send_request;
2962     }
2963 
2964     /*
2965      * 8. Done, cleanly close the connection
2966      */
2967 close_notify:
2968     mbedtls_printf("  . Closing the connection...");
2969     fflush(stdout);
2970 
2971     /*
2972      * Most of the time sending a close_notify before closing is the right
2973      * thing to do. However, when the server already knows how many messages
2974      * are expected and closes the connection by itself, this alert becomes
2975      * redundant. Sometimes with DTLS this redundancy becomes a problem by
2976      * leading to a race condition where the server might close the connection
2977      * before seeing the alert, and since UDP is connection-less when the
2978      * alert arrives it will be seen as a new connection, which will fail as
2979      * the alert is clearly not a valid ClientHello. This may cause spurious
2980      * failures in tests that use DTLS and resumption with ssl_server2 in
2981      * ssl-opt.sh, avoided by enabling skip_close_notify client-side.
2982      */
2983     if (opt.skip_close_notify == 0) {
2984         /* No error checking, the connection might be closed already */
2985         do {
2986             ret = mbedtls_ssl_close_notify(&ssl);
2987         } while (ret == MBEDTLS_ERR_SSL_WANT_WRITE);
2988         ret = 0;
2989     }
2990 
2991     mbedtls_printf(" done\n");
2992 
2993     /*
2994      * 9. Reconnect?
2995      */
2996 reconnect:
2997     if (opt.reconnect != 0) {
2998         --opt.reconnect;
2999 
3000         mbedtls_net_free(&server_fd);
3001 
3002 #if defined(MBEDTLS_TIMING_C)
3003         if (opt.reco_delay > 0) {
3004             mbedtls_net_usleep(1000 * opt.reco_delay);
3005         }
3006 #endif
3007 
3008         mbedtls_printf("  . Reconnecting with saved session...");
3009 
3010 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
3011         memset(peer_crt_info, 0, sizeof(peer_crt_info));
3012 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
3013 
3014         if ((ret = mbedtls_ssl_session_reset(&ssl)) != 0) {
3015             mbedtls_printf(" failed\n  ! mbedtls_ssl_session_reset returned -0x%x\n\n",
3016                            (unsigned int) -ret);
3017             goto exit;
3018         }
3019 
3020         if (opt.reco_mode == 1) {
3021             if ((ret = mbedtls_ssl_session_load(&saved_session,
3022                                                 session_data,
3023                                                 session_data_len)) != 0) {
3024                 mbedtls_printf(" failed\n  ! mbedtls_ssl_session_load returned -0x%x\n\n",
3025                                (unsigned int) -ret);
3026                 goto exit;
3027             }
3028         }
3029 
3030         if ((ret = mbedtls_ssl_set_session(&ssl, &saved_session)) != 0) {
3031             mbedtls_printf(" failed\n  ! mbedtls_ssl_set_session returned -0x%x\n\n",
3032                            (unsigned int) -ret);
3033             goto exit;
3034         }
3035 
3036 #if defined(MBEDTLS_X509_CRT_PARSE_C)
3037         if (opt.reco_server_name != NULL &&
3038             (ret = mbedtls_ssl_set_hostname(&ssl,
3039                                             opt.reco_server_name)) != 0) {
3040             mbedtls_printf(" failed\n  ! mbedtls_ssl_set_hostname returned %d\n\n",
3041                            ret);
3042             goto exit;
3043         }
3044 #endif
3045 
3046         if ((ret = mbedtls_net_connect(&server_fd,
3047                                        opt.server_addr, opt.server_port,
3048                                        opt.transport == MBEDTLS_SSL_TRANSPORT_STREAM ?
3049                                        MBEDTLS_NET_PROTO_TCP : MBEDTLS_NET_PROTO_UDP)) != 0) {
3050             mbedtls_printf(" failed\n  ! mbedtls_net_connect returned -0x%x\n\n",
3051                            (unsigned int) -ret);
3052             goto exit;
3053         }
3054 
3055         if (opt.nbio > 0) {
3056             ret = mbedtls_net_set_nonblock(&server_fd);
3057         } else {
3058             ret = mbedtls_net_set_block(&server_fd);
3059         }
3060         if (ret != 0) {
3061             mbedtls_printf(" failed\n  ! net_set_(non)block() returned -0x%x\n\n",
3062                            (unsigned int) -ret);
3063             goto exit;
3064         }
3065 
3066         ret = build_http_request(buf, sizeof(buf) - 1, &len);
3067         if (ret != 0) {
3068             goto exit;
3069         }
3070 
3071 #if defined(MBEDTLS_SSL_EARLY_DATA)
3072         if (ssl.conf->early_data_enabled == MBEDTLS_SSL_EARLY_DATA_ENABLED) {
3073             frags = 0;
3074             written = 0;
3075             do {
3076                 while ((ret = mbedtls_ssl_write_early_data(&ssl, buf + written,
3077                                                            len - written)) < 0) {
3078                     if (ret == MBEDTLS_ERR_SSL_CANNOT_WRITE_EARLY_DATA) {
3079                         goto end_of_early_data;
3080                     }
3081                     if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
3082                         ret != MBEDTLS_ERR_SSL_WANT_WRITE &&
3083                         ret != MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) {
3084                         mbedtls_printf(" failed\n  ! mbedtls_ssl_write returned -0x%x\n\n",
3085                                        (unsigned int) -ret);
3086                         goto exit;
3087                     }
3088 
3089                     /* For event-driven IO, wait for socket to become available */
3090                     if (opt.event == 1 /* level triggered IO */) {
3091 #if defined(MBEDTLS_TIMING_C)
3092                         idle(&server_fd, &timer, ret);
3093 #else
3094                         idle(&server_fd, ret);
3095 #endif
3096                     }
3097                 }
3098 
3099                 frags++;
3100                 written += ret;
3101             } while (written < len);
3102 
3103 end_of_early_data:
3104 
3105             buf[written] = '\0';
3106             mbedtls_printf(
3107                 " %" MBEDTLS_PRINTF_SIZET " bytes of early data written in %" MBEDTLS_PRINTF_SIZET " fragments\n\n%s\n",
3108                 written,
3109                 frags,
3110                 (char *) buf);
3111         }
3112 #endif /* MBEDTLS_SSL_EARLY_DATA */
3113 
3114         while ((ret = mbedtls_ssl_handshake(&ssl)) != 0) {
3115             if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
3116                 ret != MBEDTLS_ERR_SSL_WANT_WRITE &&
3117                 ret != MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) {
3118                 mbedtls_printf(" failed\n  ! mbedtls_ssl_handshake returned -0x%x\n\n",
3119                                (unsigned int) -ret);
3120                 goto exit;
3121             }
3122         }
3123 
3124         mbedtls_printf(" ok\n");
3125 
3126         goto send_request;
3127     }
3128 
3129     /*
3130      * Cleanup and exit
3131      */
3132 exit:
3133 #ifdef MBEDTLS_ERROR_C
3134     if (ret != 0) {
3135         char error_buf[100];
3136         mbedtls_strerror(ret, error_buf, 100);
3137         mbedtls_printf("Last error was: -0x%X - %s\n\n", (unsigned int) -ret, error_buf);
3138     }
3139 #endif
3140 
3141     mbedtls_net_free(&server_fd);
3142 
3143     mbedtls_ssl_free(&ssl);
3144     mbedtls_ssl_config_free(&conf);
3145     mbedtls_ssl_session_free(&saved_session);
3146 
3147     if (session_data != NULL) {
3148         mbedtls_platform_zeroize(session_data, session_data_len);
3149     }
3150     mbedtls_free(session_data);
3151 #if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION)
3152     if (context_buf != NULL) {
3153         mbedtls_platform_zeroize(context_buf, context_buf_len);
3154     }
3155     mbedtls_free(context_buf);
3156 #endif
3157 
3158 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
3159     mbedtls_x509_crt_free(&clicert);
3160     mbedtls_x509_crt_free(&cacert);
3161     mbedtls_pk_free(&pkey);
3162 #if defined(MBEDTLS_USE_PSA_CRYPTO)
3163     psa_destroy_key(key_slot);
3164 #endif
3165 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */
3166 
3167 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_PSK_ENABLED) && \
3168     defined(MBEDTLS_USE_PSA_CRYPTO)
3169     if (opt.psk_opaque != 0) {
3170         /* This is ok even if the slot hasn't been
3171          * initialized (we might have jumed here
3172          * immediately because of bad cmd line params,
3173          * for example). */
3174         status = psa_destroy_key(slot);
3175         if ((status != PSA_SUCCESS) &&
3176             (opt.query_config_mode == DFL_QUERY_CONFIG_MODE)) {
3177             mbedtls_printf("Failed to destroy key slot %u - error was %d",
3178                            (unsigned) MBEDTLS_SVC_KEY_ID_GET_KEY_ID(slot),
3179                            (int) status);
3180             if (ret == 0) {
3181                 ret = MBEDTLS_ERR_SSL_HW_ACCEL_FAILED;
3182             }
3183         }
3184     }
3185 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_PSK_ENABLED &&
3186           MBEDTLS_USE_PSA_CRYPTO */
3187 
3188 #if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED) && \
3189     defined(MBEDTLS_USE_PSA_CRYPTO)
3190     /*
3191      * In case opaque keys it's the user responsibility to keep the key valid
3192      * for the duration of the handshake and destroy it at the end
3193      */
3194     if ((opt.ecjpake_pw_opaque != DFL_ECJPAKE_PW_OPAQUE)) {
3195         psa_key_attributes_t check_attributes = PSA_KEY_ATTRIBUTES_INIT;
3196 
3197         /* Verify that the key is still valid before destroying it */
3198         if (psa_get_key_attributes(ecjpake_pw_slot, &check_attributes) !=
3199             PSA_SUCCESS) {
3200             if (ret == 0) {
3201                 ret = 1;
3202             }
3203             mbedtls_printf("The EC J-PAKE password key has unexpectedly been already destroyed\n");
3204         } else {
3205             psa_destroy_key(ecjpake_pw_slot);
3206         }
3207     }
3208 #endif  /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED && MBEDTLS_USE_PSA_CRYPTO */
3209 
3210 #if defined(MBEDTLS_USE_PSA_CRYPTO) || defined(MBEDTLS_SSL_PROTO_TLS1_3)
3211     const char *message = mbedtls_test_helper_is_psa_leaking();
3212     if (message) {
3213         if (ret == 0) {
3214             ret = 1;
3215         }
3216         mbedtls_printf("PSA memory leak detected: %s\n",  message);
3217     }
3218 #endif /* MBEDTLS_USE_PSA_CRYPTO || MBEDTLS_SSL_PROTO_TLS1_3 */
3219 
3220     /* For builds with MBEDTLS_TEST_USE_PSA_CRYPTO_RNG psa crypto
3221      * resources are freed by rng_free(). */
3222     /* For builds with MBEDTLS_SSL_PROTO_TLS1_3, PSA may have been
3223      * initialized under the hood by the TLS layer. See
3224      * mbedtls_ssl_tls13_crypto_init(). */
3225 #if (defined(MBEDTLS_USE_PSA_CRYPTO) || defined(MBEDTLS_SSL_PROTO_TLS1_3)) && \
3226     !defined(MBEDTLS_TEST_USE_PSA_CRYPTO_RNG)
3227     mbedtls_psa_crypto_free();
3228 #endif
3229 
3230     rng_free(&rng);
3231 
3232 #if defined(MBEDTLS_TEST_HOOKS)
3233     if (test_hooks_failure_detected()) {
3234         if (ret == 0) {
3235             ret = 1;
3236         }
3237         mbedtls_printf("Test hooks detected errors.\n");
3238     }
3239     test_hooks_free();
3240 #endif /* MBEDTLS_TEST_HOOKS */
3241 
3242 #if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
3243 #if defined(MBEDTLS_MEMORY_DEBUG)
3244     mbedtls_memory_buffer_alloc_status();
3245 #endif
3246     mbedtls_memory_buffer_alloc_free();
3247 #endif  /* MBEDTLS_MEMORY_BUFFER_ALLOC_C */
3248 
3249     // Shell can not handle large exit numbers -> 1 for errors
3250     if (ret < 0) {
3251         ret = 1;
3252     }
3253 
3254     if (opt.query_config_mode == DFL_QUERY_CONFIG_MODE) {
3255         mbedtls_exit(ret);
3256     } else {
3257         mbedtls_exit(query_config_ret);
3258     }
3259 }
3260 #endif /* !MBEDTLS_SSL_TEST_IMPOSSIBLE && MBEDTLS_SSL_CLI_C */
3261