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
) {
63 char tmp
[INET6_ADDRSTRLEN
+ 50];
65 sa
= (struct sockaddr
*)p
->ai_addr
;
66 if (sa
->sa_family
== AF_INET
) {
67 addr
= &((struct sockaddr_in
*)sa
)->sin_addr
;
68 } else if (sa
->sa_family
== AF_INET6
) {
69 addr
= &((struct sockaddr_in6
*)sa
)->sin6_addr
;
74 if (!inet_ntop(p
->ai_family
, addr
,
77 strcpy(tmp
, "<invalid>");
80 sprintf(tmp
, "<unknown family: %d>",
83 fprintf(stderr
, "connecting to: %s\n", tmp
);
85 fd
= socket(p
->ai_family
, p
->ai_socktype
, p
->ai_protocol
);
92 if (connect(fd
, p
->ai_addr
, p
->ai_addrlen
) < 0) {
103 fprintf(stderr
, "ERROR: failed to connect\n");
108 fprintf(stderr
, "connected.\n");
112 * We make the socket non-blocking, since we are going to use
113 * poll() to organise I/O.
115 fcntl(fd
, F_SETFL
, O_NONBLOCK
);
123 "usage: brssl client server[:port] [ options ]\n");
127 " -q suppress verbose messages\n");
129 " -trace activate extra debug messages (dump of all packets)\n");
131 " -sni name use this specific name for SNI\n");
133 " -nosni do not send any SNI\n");
135 " -mono use monodirectional buffering\n");
137 " -buf length set the I/O buffer length (in bytes)\n");
139 " -CA file add certificates in 'file' to trust anchors\n");
141 " -list list supported names (protocols, algorithms...)\n");
143 " -vmin name set minimum supported version (default: TLS-1.0)\n");
145 " -vmax name set maximum supported version (default: TLS-1.2)\n");
147 " -cs names set list of supported cipher suites (comma-separated)\n");
149 " -hf names add support for some hash functions (comma-separated)\n");
151 " -minhello len set minimum ClientHello length (in bytes)\n");
156 do_client(int argc
, char *argv
[])
162 const char *server_name
;
166 anchor_list anchors
= VEC_INIT
;
168 cipher_suite
*suites
;
173 br_ssl_client_context cc
;
174 br_x509_minimal_context xc
;
175 x509_noanchor_context xwc
;
176 const br_hash_class
*dnhash
;
177 unsigned char *iobuf
;
198 minhello_len
= (size_t)-1;
200 for (i
= 0; i
< argc
; i
++) {
205 if (server_name
!= NULL
) {
207 "ERROR: duplicate server name\n");
209 goto client_exit_error
;
214 if (eqstr(arg
, "-v") || eqstr(arg
, "-verbose")) {
216 } else if (eqstr(arg
, "-q") || eqstr(arg
, "-quiet")) {
218 } else if (eqstr(arg
, "-trace")) {
220 } else if (eqstr(arg
, "-sni")) {
223 "ERROR: no argument for '-sni'\n");
225 goto client_exit_error
;
228 fprintf(stderr
, "ERROR: duplicate SNI\n");
230 goto client_exit_error
;
233 } else if (eqstr(arg
, "-nosni")) {
235 fprintf(stderr
, "ERROR: duplicate SNI\n");
237 goto client_exit_error
;
240 } else if (eqstr(arg
, "-mono")) {
242 } else if (eqstr(arg
, "-buf")) {
245 "ERROR: no argument for '-buf'\n");
247 goto client_exit_error
;
250 if (iobuf_len
!= 0) {
252 "ERROR: duplicate I/O buffer length\n");
254 goto client_exit_error
;
256 iobuf_len
= parse_size(arg
);
257 if (iobuf_len
== (size_t)-1) {
259 goto client_exit_error
;
261 } else if (eqstr(arg
, "-CA")) {
264 "ERROR: no argument for '-CA'\n");
266 goto client_exit_error
;
269 if (read_trust_anchors(&anchors
, arg
) == 0) {
271 goto client_exit_error
;
273 } else if (eqstr(arg
, "-list")) {
276 } else if (eqstr(arg
, "-vmin")) {
279 "ERROR: no argument for '-vmin'\n");
281 goto client_exit_error
;
286 "ERROR: duplicate minimum version\n");
288 goto client_exit_error
;
290 vmin
= parse_version(arg
, strlen(arg
));
293 "ERROR: unrecognised version '%s'\n",
296 goto client_exit_error
;
298 } else if (eqstr(arg
, "-vmax")) {
301 "ERROR: no argument for '-vmax'\n");
303 goto client_exit_error
;
308 "ERROR: duplicate maximum version\n");
310 goto client_exit_error
;
312 vmax
= parse_version(arg
, strlen(arg
));
315 "ERROR: unrecognised version '%s'\n",
318 goto client_exit_error
;
320 } else if (eqstr(arg
, "-cs")) {
323 "ERROR: no argument for '-cs'\n");
325 goto client_exit_error
;
328 if (suites
!= NULL
) {
329 fprintf(stderr
, "ERROR: duplicate list"
330 " of cipher suites\n");
332 goto client_exit_error
;
334 suites
= parse_suites(arg
, &num_suites
);
335 if (suites
== NULL
) {
337 goto client_exit_error
;
339 } else if (eqstr(arg
, "-hf")) {
344 "ERROR: no argument for '-hf'\n");
346 goto client_exit_error
;
349 x
= parse_hash_functions(arg
);
352 goto client_exit_error
;
355 } else if (eqstr(arg
, "-minhello")) {
358 "ERROR: no argument for '-minhello'\n");
360 goto client_exit_error
;
363 if (minhello_len
!= (size_t)-1) {
364 fprintf(stderr
, "ERROR: duplicate minium"
365 " ClientHello length\n");
367 goto client_exit_error
;
369 minhello_len
= parse_size(arg
);
371 * Minimum ClientHello length must fit on 16 bits.
373 if (minhello_len
== (size_t)-1
374 || (((minhello_len
>> 12) >> 4) != 0))
377 goto client_exit_error
;
380 fprintf(stderr
, "ERROR: unknown option: '%s'\n", arg
);
382 goto client_exit_error
;
385 if (server_name
== NULL
) {
386 fprintf(stderr
, "ERROR: no server name/address provided\n");
388 goto client_exit_error
;
390 for (u
= strlen(server_name
); u
> 0; u
--) {
391 int c
= server_name
[u
- 1];
395 if (c
< '0' || c
> '9') {
401 host
= xstrdup(server_name
);
404 port
= xstrdup(server_name
+ u
);
406 memcpy(host
, server_name
, u
- 1);
420 fprintf(stderr
, "ERROR: impossible minimum/maximum protocol"
421 " version combination\n");
423 goto client_exit_error
;
425 if (suites
== NULL
) {
428 for (u
= 0; cipher_suites
[u
].name
; u
++) {
429 if ((cipher_suites
[u
].req
& REQ_TLS12
) == 0
435 suites
= xmalloc(num_suites
* sizeof *suites
);
437 for (u
= 0; cipher_suites
[u
].name
; u
++) {
438 if ((cipher_suites
[u
].req
& REQ_TLS12
) == 0
441 suites
[num_suites
++] = cipher_suites
[u
];
446 hfuns
= (unsigned)-1;
448 if (iobuf_len
== 0) {
450 iobuf_len
= BR_SSL_BUFSIZE_BIDI
;
452 iobuf_len
= BR_SSL_BUFSIZE_MONO
;
455 iobuf
= xmalloc(iobuf_len
);
458 * Compute implementation requirements and inject implementations.
460 suite_ids
= xmalloc(num_suites
* sizeof *suite_ids
);
461 br_ssl_client_zero(&cc
);
462 br_ssl_engine_set_versions(&cc
.eng
, vmin
, vmax
);
464 for (u
= 0; hash_functions
[u
].name
; u
++) {
465 const br_hash_class
*hc
;
468 hc
= hash_functions
[u
].hclass
;
469 id
= (hc
->desc
>> BR_HASHDESC_ID_OFF
) & BR_HASHDESC_ID_MASK
;
470 if ((hfuns
& ((unsigned)1 << id
)) != 0) {
474 if (dnhash
== NULL
) {
475 fprintf(stderr
, "ERROR: no supported hash function\n");
476 goto client_exit_error
;
478 br_x509_minimal_init(&xc
, dnhash
,
479 &VEC_ELT(anchors
, 0), VEC_LEN(anchors
));
480 if (vmin
<= BR_TLS11
) {
481 if (!(hfuns
& (1 << br_md5_ID
))) {
482 fprintf(stderr
, "ERROR: TLS 1.0 and 1.1 need MD5\n");
483 goto client_exit_error
;
485 if (!(hfuns
& (1 << br_sha1_ID
))) {
486 fprintf(stderr
, "ERROR: TLS 1.0 and 1.1 need SHA-1\n");
487 goto client_exit_error
;
490 for (u
= 0; u
< num_suites
; u
++) {
494 suite_ids
[u
] = suites
[u
].suite
;
495 if ((req
& REQ_TLS12
) != 0 && vmax
< BR_TLS12
) {
497 "ERROR: cipher suite %s requires TLS 1.2\n",
499 goto client_exit_error
;
501 if ((req
& REQ_SHA1
) != 0 && !(hfuns
& (1 << br_sha1_ID
))) {
503 "ERROR: cipher suite %s requires SHA-1\n",
505 goto client_exit_error
;
507 if ((req
& REQ_SHA256
) != 0 && !(hfuns
& (1 << br_sha256_ID
))) {
509 "ERROR: cipher suite %s requires SHA-256\n",
511 goto client_exit_error
;
513 if ((req
& REQ_SHA384
) != 0 && !(hfuns
& (1 << br_sha384_ID
))) {
515 "ERROR: cipher suite %s requires SHA-384\n",
517 goto client_exit_error
;
519 /* TODO: algorithm implementation selection */
520 if ((req
& REQ_AESCBC
) != 0) {
521 br_ssl_engine_set_aes_cbc(&cc
.eng
,
522 &br_aes_ct_cbcenc_vtable
,
523 &br_aes_ct_cbcdec_vtable
);
524 br_ssl_engine_set_cbc(&cc
.eng
,
525 &br_sslrec_in_cbc_vtable
,
526 &br_sslrec_out_cbc_vtable
);
528 if ((req
& REQ_AESGCM
) != 0) {
529 br_ssl_engine_set_aes_ctr(&cc
.eng
,
530 &br_aes_ct_ctr_vtable
);
531 br_ssl_engine_set_ghash(&cc
.eng
,
533 br_ssl_engine_set_gcm(&cc
.eng
,
534 &br_sslrec_in_gcm_vtable
,
535 &br_sslrec_out_gcm_vtable
);
537 if ((req
& REQ_3DESCBC
) != 0) {
538 br_ssl_engine_set_des_cbc(&cc
.eng
,
539 &br_des_ct_cbcenc_vtable
,
540 &br_des_ct_cbcdec_vtable
);
541 br_ssl_engine_set_cbc(&cc
.eng
,
542 &br_sslrec_in_cbc_vtable
,
543 &br_sslrec_out_cbc_vtable
);
545 if ((req
& REQ_RSAKEYX
) != 0) {
546 br_ssl_client_set_rsapub(&cc
, &br_rsa_i31_public
);
548 if ((req
& REQ_ECDHE_RSA
) != 0) {
549 br_ssl_engine_set_ec(&cc
.eng
, &br_ec_prime_i31
);
550 br_ssl_client_set_rsavrfy(&cc
, &br_rsa_i31_pkcs1_vrfy
);
552 if ((req
& REQ_ECDHE_ECDSA
) != 0) {
553 br_ssl_engine_set_ec(&cc
.eng
, &br_ec_prime_i31
);
554 br_ssl_client_set_ecdsa(&cc
, &br_ecdsa_i31_vrfy_asn1
);
556 if ((req
& REQ_ECDH
) != 0) {
557 br_ssl_engine_set_ec(&cc
.eng
, &br_ec_prime_i31
);
560 br_ssl_engine_set_suites(&cc
.eng
, suite_ids
, num_suites
);
562 for (u
= 0; hash_functions
[u
].name
; u
++) {
563 const br_hash_class
*hc
;
566 hc
= hash_functions
[u
].hclass
;
567 id
= (hc
->desc
>> BR_HASHDESC_ID_OFF
) & BR_HASHDESC_ID_MASK
;
568 if ((hfuns
& ((unsigned)1 << id
)) != 0) {
569 br_ssl_engine_set_hash(&cc
.eng
, id
, hc
);
570 br_x509_minimal_set_hash(&xc
, id
, hc
);
573 if (vmin
<= BR_TLS11
) {
574 br_ssl_engine_set_prf10(&cc
.eng
, &br_tls10_prf
);
576 if (vmax
>= BR_TLS12
) {
577 if ((hfuns
& ((unsigned)1 << br_sha256_ID
)) != 0) {
578 br_ssl_engine_set_prf_sha256(&cc
.eng
,
579 &br_tls12_sha256_prf
);
581 if ((hfuns
& ((unsigned)1 << br_sha384_ID
)) != 0) {
582 br_ssl_engine_set_prf_sha384(&cc
.eng
,
583 &br_tls12_sha384_prf
);
586 br_x509_minimal_set_rsa(&xc
, &br_rsa_i31_pkcs1_vrfy
);
587 br_x509_minimal_set_ecdsa(&xc
,
588 &br_ec_prime_i31
, &br_ecdsa_i31_vrfy_asn1
);
591 * If there is no provided trust anchor, then certificate validation
592 * will always fail. In that situation, we use our custom wrapper
593 * that tolerates unknown anchors.
595 if (VEC_LEN(anchors
) == 0) {
598 "WARNING: no configured trust anchor\n");
600 x509_noanchor_init(&xwc
, &xc
.vtable
);
601 br_ssl_engine_set_x509(&cc
.eng
, &xwc
.vtable
);
603 br_ssl_engine_set_x509(&cc
.eng
, &xc
.vtable
);
606 if (minhello_len
!= (size_t)-1) {
607 br_ssl_client_set_min_clienthello_len(&cc
, minhello_len
);
610 br_ssl_engine_set_buffer(&cc
.eng
, iobuf
, iobuf_len
, bidi
);
611 br_ssl_client_reset(&cc
, sni
, 0);
614 * Connect to the peer.
616 fd
= host_connect(host
, port
, verbose
);
618 goto client_exit_error
;
622 * Run the engine until completion.
624 if (run_ssl_engine(&cc
.eng
, fd
,
625 (verbose
? RUN_ENGINE_VERBOSE
: 0)
626 | (trace
? RUN_ENGINE_TRACE
: 0)) != 0)
628 goto client_exit_error
;
634 * Release allocated structures.
640 VEC_CLEAREXT(anchors
, &free_ta_contents
);