2 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 #include <sys/types.h>
32 #include <sys/socket.h>
34 #include <netinet/in.h>
35 #include <arpa/inet.h>
43 host_connect(const char *host
, const char *port
, int verbose
)
45 struct addrinfo hints
, *si
, *p
;
49 memset(&hints
, 0, sizeof hints
);
50 hints
.ai_family
= PF_UNSPEC
;
51 hints
.ai_socktype
= SOCK_STREAM
;
52 err
= getaddrinfo(host
, port
, &hints
, &si
);
54 fprintf(stderr
, "ERROR: getaddrinfo(): %s\n",
59 for (p
= si
; p
!= NULL
; p
= p
->ai_next
) {
62 char tmp
[INET6_ADDRSTRLEN
+ 50];
64 sa
= (struct sockaddr
*)p
->ai_addr
;
65 if (sa
->sa_family
== AF_INET
) {
66 addr
= &((struct sockaddr_in
*)sa
)->sin_addr
;
67 } else if (sa
->sa_family
== AF_INET6
) {
68 addr
= &((struct sockaddr_in6
*)sa
)->sin6_addr
;
73 inet_ntop(p
->ai_family
, addr
, tmp
, sizeof tmp
);
75 sprintf(tmp
, "<unknown family: %d>",
79 fprintf(stderr
, "connecting to: %s\n", tmp
);
81 fd
= socket(p
->ai_family
, p
->ai_socktype
, p
->ai_protocol
);
88 if (connect(fd
, p
->ai_addr
, p
->ai_addrlen
) < 0) {
99 fprintf(stderr
, "ERROR: failed to connect\n");
104 fprintf(stderr
, "connected.\n");
108 * We make the socket non-blocking, since we are going to use
109 * poll() to organise I/O.
111 fcntl(fd
, F_SETFL
, O_NONBLOCK
);
119 "usage: brssl client server[:port] [ options ]\n");
123 " -q suppress verbose messages\n");
125 " -trace activate extra debug messages (dump of all packets)\n");
127 " -sni name use this specific name for SNI\n");
129 " -nosni do not send any SNI\n");
131 " -mono use monodirectional buffering\n");
133 " -buf length set the I/O buffer length (in bytes)\n");
135 " -CA file add certificates in 'file' to trust anchors\n");
137 " -list list supported names (protocols, algorithms...)\n");
139 " -vmin name set minimum supported version (default: TLS-1.0)\n");
141 " -vmax name set maximum supported version (default: TLS-1.2)\n");
143 " -cs names set list of supported cipher suites (comma-separated)\n");
145 " -hf names add support for some hash functions (comma-separated)\n");
150 do_client(int argc
, char *argv
[])
156 const char *server_name
;
160 anchor_list anchors
= VEC_INIT
;
162 cipher_suite
*suites
;
167 br_ssl_client_context cc
;
168 br_x509_minimal_context xc
;
169 x509_noanchor_context xwc
;
170 const br_hash_class
*dnhash
;
171 unsigned char *iobuf
;
192 for (i
= 0; i
< argc
; i
++) {
197 if (server_name
!= NULL
) {
199 "ERROR: duplicate server name\n");
201 goto client_exit_error
;
206 if (eqstr(arg
, "-v") || eqstr(arg
, "-verbose")) {
208 } else if (eqstr(arg
, "-q") || eqstr(arg
, "-quiet")) {
210 } else if (eqstr(arg
, "-trace")) {
212 } else if (eqstr(arg
, "-sni")) {
215 "ERROR: no argument for '-sni'\n");
217 goto client_exit_error
;
220 fprintf(stderr
, "ERROR: duplicate SNI\n");
222 goto client_exit_error
;
225 } else if (eqstr(arg
, "-nosni")) {
227 fprintf(stderr
, "ERROR: duplicate SNI\n");
229 goto client_exit_error
;
232 } else if (eqstr(arg
, "-mono")) {
234 } else if (eqstr(arg
, "-buf")) {
237 "ERROR: no argument for '-buf'\n");
239 goto client_exit_error
;
242 if (iobuf_len
!= 0) {
244 "ERROR: duplicate I/O buffer length\n");
246 goto client_exit_error
;
248 iobuf_len
= strtoul(arg
, 0, 10);
249 } else if (eqstr(arg
, "-CA")) {
252 "ERROR: no argument for '-CA'\n");
254 goto client_exit_error
;
257 if (read_trust_anchors(&anchors
, arg
) == 0) {
259 goto client_exit_error
;
261 } else if (eqstr(arg
, "-list")) {
264 } else if (eqstr(arg
, "-vmin")) {
267 "ERROR: no argument for '-vmin'\n");
269 goto client_exit_error
;
274 "ERROR: duplicate minimum version\n");
276 goto client_exit_error
;
278 vmin
= parse_version(arg
, strlen(arg
));
281 "ERROR: unrecognised version '%s'\n",
284 goto client_exit_error
;
286 } else if (eqstr(arg
, "-vmax")) {
289 "ERROR: no argument for '-vmax'\n");
291 goto client_exit_error
;
296 "ERROR: duplicate maximum version\n");
298 goto client_exit_error
;
300 vmax
= parse_version(arg
, strlen(arg
));
303 "ERROR: unrecognised version '%s'\n",
306 goto client_exit_error
;
308 } else if (eqstr(arg
, "-cs")) {
311 "ERROR: no argument for '-cs'\n");
313 goto client_exit_error
;
316 if (suites
!= NULL
) {
317 fprintf(stderr
, "ERROR: duplicate list"
318 " of cipher suites\n");
320 goto client_exit_error
;
322 suites
= parse_suites(arg
, &num_suites
);
323 if (suites
== NULL
) {
325 goto client_exit_error
;
327 } else if (eqstr(arg
, "-hf")) {
332 "ERROR: no argument for '-hf'\n");
334 goto client_exit_error
;
337 x
= parse_hash_functions(arg
);
340 goto client_exit_error
;
344 fprintf(stderr
, "ERROR: unknown option: '%s'\n", arg
);
346 goto client_exit_error
;
349 if (server_name
== NULL
) {
350 fprintf(stderr
, "ERROR: no server name/address provided\n");
352 goto client_exit_error
;
354 for (u
= strlen(server_name
); u
> 0; u
--) {
355 int c
= server_name
[u
- 1];
359 if (c
< '0' || c
> '9') {
365 host
= xstrdup(server_name
);
368 port
= xstrdup(server_name
+ u
);
370 memcpy(host
, server_name
, u
- 1);
384 fprintf(stderr
, "ERROR: impossible minimum/maximum protocol"
385 " version combination\n");
387 goto client_exit_error
;
389 if (suites
== NULL
) {
392 for (u
= 0; cipher_suites
[u
].name
; u
++) {
393 if ((cipher_suites
[u
].req
& REQ_TLS12
) == 0
399 suites
= xmalloc(num_suites
* sizeof *suites
);
401 for (u
= 0; cipher_suites
[u
].name
; u
++) {
402 if ((cipher_suites
[u
].req
& REQ_TLS12
) == 0
405 suites
[num_suites
++] = cipher_suites
[u
];
410 hfuns
= (unsigned)-1;
412 if (iobuf_len
== 0) {
414 iobuf_len
= BR_SSL_BUFSIZE_BIDI
;
416 iobuf_len
= BR_SSL_BUFSIZE_MONO
;
419 iobuf
= xmalloc(iobuf_len
);
422 * Compute implementation requirements and inject implementations.
424 suite_ids
= xmalloc(num_suites
* sizeof *suite_ids
);
425 br_ssl_client_zero(&cc
);
426 br_ssl_engine_set_versions(&cc
.eng
, vmin
, vmax
);
428 for (u
= 0; hash_functions
[u
].name
; u
++) {
429 const br_hash_class
*hc
;
432 hc
= hash_functions
[u
].hclass
;
433 id
= (hc
->desc
>> BR_HASHDESC_ID_OFF
) & BR_HASHDESC_ID_MASK
;
434 if ((hfuns
& ((unsigned)1 << id
)) != 0) {
438 if (dnhash
== NULL
) {
439 fprintf(stderr
, "ERROR: no supported hash function\n");
440 goto client_exit_error
;
442 br_x509_minimal_init(&xc
, dnhash
,
443 &VEC_ELT(anchors
, 0), VEC_LEN(anchors
));
444 if (vmin
<= BR_TLS11
) {
445 if (!(hfuns
& (1 << br_md5_ID
))) {
446 fprintf(stderr
, "ERROR: TLS 1.0 and 1.1 need MD5\n");
447 goto client_exit_error
;
449 if (!(hfuns
& (1 << br_sha1_ID
))) {
450 fprintf(stderr
, "ERROR: TLS 1.0 and 1.1 need SHA-1\n");
451 goto client_exit_error
;
454 for (u
= 0; u
< num_suites
; u
++) {
458 suite_ids
[u
] = suites
[u
].suite
;
459 if ((req
& REQ_TLS12
) != 0 && vmax
< BR_TLS12
) {
461 "ERROR: cipher suite %s requires TLS 1.2\n",
463 goto client_exit_error
;
465 if ((req
& REQ_SHA1
) != 0 && !(hfuns
& (1 << br_sha1_ID
))) {
467 "ERROR: cipher suite %s requires SHA-1\n",
469 goto client_exit_error
;
471 if ((req
& REQ_SHA256
) != 0 && !(hfuns
& (1 << br_sha256_ID
))) {
473 "ERROR: cipher suite %s requires SHA-256\n",
475 goto client_exit_error
;
477 if ((req
& REQ_SHA384
) != 0 && !(hfuns
& (1 << br_sha384_ID
))) {
479 "ERROR: cipher suite %s requires SHA-384\n",
481 goto client_exit_error
;
483 /* TODO: algorithm implementation selection */
484 if ((req
& REQ_AESCBC
) != 0) {
485 br_ssl_engine_set_aes_cbc(&cc
.eng
,
486 &br_aes_ct_cbcenc_vtable
,
487 &br_aes_ct_cbcdec_vtable
);
488 br_ssl_engine_set_cbc(&cc
.eng
,
489 &br_sslrec_in_cbc_vtable
,
490 &br_sslrec_out_cbc_vtable
);
492 if ((req
& REQ_AESGCM
) != 0) {
493 br_ssl_engine_set_aes_ctr(&cc
.eng
,
494 &br_aes_ct_ctr_vtable
);
495 br_ssl_engine_set_ghash(&cc
.eng
,
497 br_ssl_engine_set_gcm(&cc
.eng
,
498 &br_sslrec_in_gcm_vtable
,
499 &br_sslrec_out_gcm_vtable
);
501 if ((req
& REQ_3DESCBC
) != 0) {
502 br_ssl_engine_set_des_cbc(&cc
.eng
,
503 &br_des_ct_cbcenc_vtable
,
504 &br_des_ct_cbcdec_vtable
);
505 br_ssl_engine_set_cbc(&cc
.eng
,
506 &br_sslrec_in_cbc_vtable
,
507 &br_sslrec_out_cbc_vtable
);
509 if ((req
& REQ_RSAKEYX
) != 0) {
510 br_ssl_client_set_rsapub(&cc
, &br_rsa_i31_public
);
512 if ((req
& REQ_ECDHE_RSA
) != 0) {
513 br_ssl_engine_set_ec(&cc
.eng
, &br_ec_prime_i31
);
514 br_ssl_client_set_rsavrfy(&cc
, &br_rsa_i31_pkcs1_vrfy
);
516 if ((req
& REQ_ECDHE_ECDSA
) != 0) {
517 br_ssl_engine_set_ec(&cc
.eng
, &br_ec_prime_i31
);
518 br_ssl_client_set_ecdsa(&cc
, &br_ecdsa_i31_vrfy_asn1
);
520 if ((req
& REQ_ECDH
) != 0) {
521 br_ssl_engine_set_ec(&cc
.eng
, &br_ec_prime_i31
);
524 br_ssl_engine_set_suites(&cc
.eng
, suite_ids
, num_suites
);
526 for (u
= 0; hash_functions
[u
].name
; u
++) {
527 const br_hash_class
*hc
;
530 hc
= hash_functions
[u
].hclass
;
531 id
= (hc
->desc
>> BR_HASHDESC_ID_OFF
) & BR_HASHDESC_ID_MASK
;
532 if ((hfuns
& ((unsigned)1 << id
)) != 0) {
533 br_ssl_engine_set_hash(&cc
.eng
, id
, hc
);
534 br_x509_minimal_set_hash(&xc
, id
, hc
);
537 if (vmin
<= BR_TLS11
) {
538 br_ssl_engine_set_prf10(&cc
.eng
, &br_tls10_prf
);
540 if (vmax
>= BR_TLS12
) {
541 if ((hfuns
& ((unsigned)1 << br_sha256_ID
)) != 0) {
542 br_ssl_engine_set_prf_sha256(&cc
.eng
,
543 &br_tls12_sha256_prf
);
545 if ((hfuns
& ((unsigned)1 << br_sha384_ID
)) != 0) {
546 br_ssl_engine_set_prf_sha384(&cc
.eng
,
547 &br_tls12_sha384_prf
);
550 br_x509_minimal_set_rsa(&xc
, &br_rsa_i31_pkcs1_vrfy
);
551 br_x509_minimal_set_ecdsa(&xc
,
552 &br_ec_prime_i31
, &br_ecdsa_i31_vrfy_asn1
);
555 * If there is no provided trust anchor, then certificate validation
556 * will always fail. In that situation, we use our custom wrapper
557 * that tolerates unknown anchors.
559 if (VEC_LEN(anchors
) == 0) {
562 "WARNING: no configured trust anchor\n");
564 x509_noanchor_init(&xwc
, &xc
.vtable
);
565 br_ssl_engine_set_x509(&cc
.eng
, &xwc
.vtable
);
567 br_ssl_engine_set_x509(&cc
.eng
, &xc
.vtable
);
570 br_ssl_engine_set_buffer(&cc
.eng
, iobuf
, iobuf_len
, bidi
);
571 br_ssl_client_reset(&cc
, sni
, 0);
574 * Connect to the peer.
576 fd
= host_connect(host
, port
, verbose
);
578 goto client_exit_error
;
582 * Run the engine until completion.
584 if (run_ssl_engine(&cc
.eng
, fd
,
585 (verbose
? RUN_ENGINE_VERBOSE
: 0)
586 | (trace
? RUN_ENGINE_TRACE
: 0)) != 0)
588 goto client_exit_error
;
594 * Release allocated structures.
600 VEC_CLEAREXT(anchors
, &free_ta_contents
);