Commit | Line | Data |
---|---|---|
c55a77db PH |
1 | /* A little hacked up program that makes a TCP/IP call and reads a script to |
2 | drive it, for testing Exim server code running as a daemon. It's got a bit | |
3 | messy with the addition of support for either OpenSSL or GnuTLS. The code for | |
2b4a568d JH |
4 | those was hacked out of Exim itself, then code for OpenSSL OCSP stapling was |
5 | ripped from the openssl ocsp and s_client utilities. */ | |
c55a77db PH |
6 | |
7 | /* ANSI C standard includes */ | |
8 | ||
9 | #include <ctype.h> | |
10 | #include <signal.h> | |
11 | #include <stdarg.h> | |
12 | #include <stddef.h> | |
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <string.h> | |
16 | #include <time.h> | |
17 | ||
18 | /* Unix includes */ | |
19 | ||
20 | #include <errno.h> | |
21 | #include <dirent.h> | |
22 | #include <sys/types.h> | |
23 | ||
24 | #include <netinet/in_systm.h> | |
25 | #include <netinet/in.h> | |
26 | #include <netinet/ip.h> | |
27 | ||
28 | #include <netdb.h> | |
29 | #include <arpa/inet.h> | |
30 | #include <sys/time.h> | |
31 | #include <sys/resource.h> | |
32 | #include <sys/socket.h> | |
33 | #include <sys/stat.h> | |
34 | #include <fcntl.h> | |
35 | #include <unistd.h> | |
36 | #include <utime.h> | |
37 | ||
38 | #ifdef AF_INET6 | |
39 | #define HAVE_IPV6 1 | |
40 | #endif | |
41 | ||
42 | #ifndef S_ADDR_TYPE | |
43 | #define S_ADDR_TYPE u_long | |
44 | #endif | |
45 | ||
46 | typedef unsigned char uschar; | |
47 | ||
48 | #define CS (char *) | |
49 | #define US (unsigned char *) | |
50 | ||
51 | #define FALSE 0 | |
52 | #define TRUE 1 | |
53 | ||
54 | ||
55 | ||
56 | static int sigalrm_seen = 0; | |
57 | ||
58 | ||
59 | /* TLS support can be optionally included, either for OpenSSL or GnuTLS. The | |
60 | latter needs a whole pile of tables. */ | |
61 | ||
62 | #ifdef HAVE_OPENSSL | |
348051ad JH |
63 | # define HAVE_TLS |
64 | # include <openssl/crypto.h> | |
65 | # include <openssl/x509.h> | |
66 | # include <openssl/pem.h> | |
67 | # include <openssl/ssl.h> | |
68 | # include <openssl/err.h> | |
69 | # include <openssl/rand.h> | |
70 | # include <openssl/ocsp.h> | |
c55a77db PH |
71 | #endif |
72 | ||
73 | ||
74 | #ifdef HAVE_GNUTLS | |
348051ad JH |
75 | # define HAVE_TLS |
76 | # include <gnutls/gnutls.h> | |
77 | # include <gnutls/x509.h> | |
78 | # if GNUTLS_VERSION_NUMBER >= 0x030103 | |
79 | # define HAVE_OCSP | |
80 | # include <gnutls/ocsp.h> | |
81 | # endif | |
c55a77db | 82 | |
348051ad | 83 | # define DH_BITS 768 |
c55a77db PH |
84 | |
85 | /* Local static variables for GNUTLS */ | |
86 | ||
c55a77db PH |
87 | static gnutls_dh_params dh_params = NULL; |
88 | ||
89 | static gnutls_certificate_credentials_t x509_cred = NULL; | |
90 | static gnutls_session tls_session = NULL; | |
91 | ||
92 | static int ssl_session_timeout = 200; | |
93 | ||
94 | /* Priorities for TLS algorithms to use. */ | |
95 | ||
96 | static const int protocol_priority[16] = { GNUTLS_TLS1, GNUTLS_SSL3, 0 }; | |
97 | ||
98 | static const int kx_priority[16] = { | |
99 | GNUTLS_KX_RSA, | |
100 | GNUTLS_KX_DHE_DSS, | |
101 | GNUTLS_KX_DHE_RSA, | |
c55a77db PH |
102 | 0 }; |
103 | ||
104 | static int default_cipher_priority[16] = { | |
105 | GNUTLS_CIPHER_AES_256_CBC, | |
106 | GNUTLS_CIPHER_AES_128_CBC, | |
107 | GNUTLS_CIPHER_3DES_CBC, | |
108 | GNUTLS_CIPHER_ARCFOUR_128, | |
109 | 0 }; | |
110 | ||
111 | static const int mac_priority[16] = { | |
112 | GNUTLS_MAC_SHA, | |
113 | GNUTLS_MAC_MD5, | |
114 | 0 }; | |
115 | ||
116 | static const int comp_priority[16] = { GNUTLS_COMP_NULL, 0 }; | |
117 | static const int cert_type_priority[16] = { GNUTLS_CRT_X509, 0 }; | |
118 | ||
348051ad | 119 | #endif /*HAVE_GNUTLS*/ |
c55a77db PH |
120 | |
121 | ||
122 | ||
2b4a568d JH |
123 | #ifdef HAVE_TLS |
124 | char * ocsp_stapling = NULL; | |
125 | #endif | |
126 | ||
c55a77db PH |
127 | |
128 | /************************************************* | |
129 | * SIGALRM handler - crash out * | |
130 | *************************************************/ | |
131 | ||
132 | static void | |
133 | sigalrm_handler_crash(int sig) | |
134 | { | |
135 | sig = sig; /* Keep picky compilers happy */ | |
136 | printf("\nClient timed out\n"); | |
137 | exit(99); | |
138 | } | |
139 | ||
140 | ||
141 | /************************************************* | |
142 | * SIGALRM handler - set flag * | |
143 | *************************************************/ | |
144 | ||
145 | static void | |
146 | sigalrm_handler_flag(int sig) | |
147 | { | |
148 | sig = sig; /* Keep picky compilers happy */ | |
149 | sigalrm_seen = 1; | |
150 | } | |
151 | ||
152 | ||
153 | ||
154 | /****************************************************************************/ | |
155 | /****************************************************************************/ | |
156 | ||
157 | #ifdef HAVE_OPENSSL | |
f5d78688 JH |
158 | |
159 | X509_STORE * | |
160 | setup_verify(BIO *bp, char *CAfile, char *CApath) | |
161 | { | |
162 | X509_STORE *store; | |
163 | X509_LOOKUP *lookup; | |
164 | if(!(store = X509_STORE_new())) goto end; | |
165 | lookup=X509_STORE_add_lookup(store,X509_LOOKUP_file()); | |
166 | if (lookup == NULL) goto end; | |
167 | if (CAfile) { | |
168 | if(!X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM)) { | |
169 | BIO_printf(bp, "Error loading file %s\n", CAfile); | |
170 | goto end; | |
171 | } | |
172 | } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT); | |
173 | ||
174 | lookup=X509_STORE_add_lookup(store,X509_LOOKUP_hash_dir()); | |
175 | if (lookup == NULL) goto end; | |
176 | if (CApath) { | |
177 | if(!X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM)) { | |
178 | BIO_printf(bp, "Error loading directory %s\n", CApath); | |
179 | goto end; | |
180 | } | |
181 | } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT); | |
182 | ||
183 | ERR_clear_error(); | |
184 | return store; | |
185 | end: | |
186 | X509_STORE_free(store); | |
187 | return NULL; | |
188 | } | |
189 | ||
190 | ||
191 | static int | |
192 | tls_client_stapling_cb(SSL *s, void *arg) | |
193 | { | |
194 | const unsigned char *p; | |
195 | int len; | |
196 | OCSP_RESPONSE *rsp; | |
197 | OCSP_BASICRESP *bs; | |
198 | char *CAfile = NULL; | |
199 | X509_STORE *store = NULL; | |
200 | int ret = 1; | |
201 | ||
202 | len = SSL_get_tlsext_status_ocsp_resp(s, &p); | |
203 | /*BIO_printf(arg, "OCSP response: ");*/ | |
204 | if (!p) | |
205 | { | |
206 | BIO_printf(arg, "no response received\n"); | |
207 | return 1; | |
208 | } | |
209 | if(!(rsp = d2i_OCSP_RESPONSE(NULL, &p, len))) | |
210 | { | |
211 | BIO_printf(arg, "response parse error\n"); | |
212 | BIO_dump_indent(arg, (char *)p, len, 4); | |
213 | return 0; | |
214 | } | |
215 | if(!(bs = OCSP_response_get1_basic(rsp))) | |
216 | { | |
217 | BIO_printf(arg, "error parsing response\n"); | |
218 | return 0; | |
219 | } | |
220 | ||
221 | CAfile = ocsp_stapling; | |
222 | if(!(store = setup_verify(arg, CAfile, NULL))) | |
223 | { | |
224 | BIO_printf(arg, "error in cert setup\n"); | |
225 | return 0; | |
226 | } | |
227 | ||
228 | /* No file of alternate certs, no options */ | |
229 | if(OCSP_basic_verify(bs, NULL, store, 0) <= 0) | |
230 | { | |
231 | BIO_printf(arg, "Response Verify Failure\n"); | |
232 | ERR_print_errors(arg); | |
233 | ret = 0; | |
234 | } | |
235 | else | |
236 | BIO_printf(arg, "Response verify OK\n"); | |
237 | ||
238 | X509_STORE_free(store); | |
239 | return ret; | |
240 | } | |
241 | ||
242 | ||
c55a77db PH |
243 | /************************************************* |
244 | * Start an OpenSSL TLS session * | |
245 | *************************************************/ | |
246 | ||
2b4a568d JH |
247 | int |
248 | tls_start(int sock, SSL **ssl, SSL_CTX *ctx) | |
c55a77db PH |
249 | { |
250 | int rc; | |
251 | static const char *sid_ctx = "exim"; | |
252 | ||
253 | RAND_load_file("client.c", -1); /* Not *very* random! */ | |
254 | ||
255 | *ssl = SSL_new (ctx); | |
256 | SSL_set_session_id_context(*ssl, sid_ctx, strlen(sid_ctx)); | |
257 | SSL_set_fd (*ssl, sock); | |
258 | SSL_set_connect_state(*ssl); | |
259 | ||
f5d78688 JH |
260 | if (ocsp_stapling) |
261 | { | |
262 | SSL_CTX_set_tlsext_status_cb(ctx, tls_client_stapling_cb); | |
263 | SSL_CTX_set_tlsext_status_arg(ctx, BIO_new_fp(stdout, BIO_NOCLOSE)); | |
264 | SSL_set_tlsext_status_type(*ssl, TLSEXT_STATUSTYPE_ocsp); | |
265 | } | |
266 | ||
c55a77db PH |
267 | signal(SIGALRM, sigalrm_handler_flag); |
268 | sigalrm_seen = 0; | |
269 | alarm(5); | |
270 | rc = SSL_connect (*ssl); | |
271 | alarm(0); | |
272 | ||
273 | if (sigalrm_seen) | |
274 | { | |
275 | printf("SSL_connect timed out\n"); | |
276 | return 0; | |
277 | } | |
278 | ||
279 | if (rc <= 0) | |
280 | { | |
281 | ERR_print_errors_fp(stdout); | |
282 | return 0; | |
283 | } | |
284 | ||
285 | printf("SSL connection using %s\n", SSL_get_cipher (*ssl)); | |
286 | return 1; | |
287 | } | |
288 | ||
289 | ||
290 | /************************************************* | |
291 | * SSL Information callback * | |
292 | *************************************************/ | |
293 | ||
294 | static void | |
295 | info_callback(SSL *s, int where, int ret) | |
296 | { | |
297 | where = where; | |
298 | ret = ret; | |
299 | printf("SSL info: %s\n", SSL_state_string_long(s)); | |
300 | } | |
301 | #endif | |
302 | ||
303 | ||
304 | /****************************************************************************/ | |
305 | /****************************************************************************/ | |
306 | ||
307 | ||
308 | #ifdef HAVE_GNUTLS | |
309 | /************************************************* | |
310 | * Handle GnuTLS error * | |
311 | *************************************************/ | |
312 | ||
313 | /* Called from lots of places when errors occur before actually starting to do | |
314 | the TLS handshake, that is, while the session is still in clear. | |
315 | ||
316 | Argument: | |
317 | prefix prefix text | |
318 | err a GnuTLS error number, or 0 if local error | |
319 | ||
320 | Returns: doesn't - it dies | |
321 | */ | |
322 | ||
323 | static void | |
324 | gnutls_error(uschar *prefix, int err) | |
325 | { | |
bb727765 | 326 | fprintf(stderr, "GnuTLS connection error: %s:", prefix); |
c55a77db PH |
327 | if (err != 0) fprintf(stderr, " %s", gnutls_strerror(err)); |
328 | fprintf(stderr, "\n"); | |
9ff403f8 | 329 | exit(98); |
c55a77db PH |
330 | } |
331 | ||
332 | ||
333 | ||
334 | /************************************************* | |
bb727765 | 335 | * Setup up DH parameters * |
c55a77db PH |
336 | *************************************************/ |
337 | ||
338 | /* For the test suite, the parameters should always be available in the spool | |
339 | directory. */ | |
340 | ||
341 | static void | |
bb727765 | 342 | init_dh(void) |
c55a77db PH |
343 | { |
344 | int fd; | |
345 | int ret; | |
346 | gnutls_datum m; | |
347 | uschar filename[200]; | |
348 | struct stat statbuf; | |
349 | ||
350 | /* Initialize the data structures for holding the parameters */ | |
351 | ||
c55a77db PH |
352 | ret = gnutls_dh_params_init(&dh_params); |
353 | if (ret < 0) gnutls_error(US"init dh_params", ret); | |
354 | ||
355 | /* Open the cache file for reading and if successful, read it and set up the | |
bb727765 | 356 | parameters. */ |
c55a77db PH |
357 | |
358 | fd = open("aux-fixed/gnutls-params", O_RDONLY, 0); | |
359 | if (fd < 0) | |
360 | { | |
361 | fprintf(stderr, "Failed to open spool/gnutls-params: %s\n", strerror(errno)); | |
9ff403f8 | 362 | exit(97); |
c55a77db PH |
363 | } |
364 | ||
365 | if (fstat(fd, &statbuf) < 0) | |
366 | { | |
367 | (void)close(fd); | |
368 | return gnutls_error(US"TLS cache stat failed", 0); | |
369 | } | |
370 | ||
371 | m.size = statbuf.st_size; | |
372 | m.data = malloc(m.size); | |
373 | if (m.data == NULL) | |
374 | return gnutls_error(US"memory allocation failed", 0); | |
375 | if (read(fd, m.data, m.size) != m.size) | |
376 | return gnutls_error(US"TLS cache read failed", 0); | |
377 | (void)close(fd); | |
378 | ||
c55a77db PH |
379 | ret = gnutls_dh_params_import_pkcs3(dh_params, &m, GNUTLS_X509_FMT_PEM); |
380 | if (ret < 0) return gnutls_error(US"DH params import", ret); | |
381 | free(m.data); | |
382 | } | |
383 | ||
384 | ||
385 | ||
386 | ||
387 | /************************************************* | |
388 | * Initialize for GnuTLS * | |
389 | *************************************************/ | |
390 | ||
391 | /* | |
392 | Arguments: | |
393 | certificate certificate file | |
394 | privatekey private key file | |
395 | */ | |
396 | ||
397 | static void | |
398 | tls_init(uschar *certificate, uschar *privatekey) | |
399 | { | |
400 | int rc; | |
401 | ||
402 | rc = gnutls_global_init(); | |
403 | if (rc < 0) gnutls_error(US"gnutls_global_init", rc); | |
404 | ||
bb727765 | 405 | /* Read D-H parameters from the cache file. */ |
c55a77db | 406 | |
bb727765 | 407 | init_dh(); |
c55a77db PH |
408 | |
409 | /* Create the credentials structure */ | |
410 | ||
411 | rc = gnutls_certificate_allocate_credentials(&x509_cred); | |
412 | if (rc < 0) gnutls_error(US"certificate_allocate_credentials", rc); | |
413 | ||
414 | /* Set the certificate and private keys */ | |
415 | ||
416 | if (certificate != NULL) | |
417 | { | |
418 | rc = gnutls_certificate_set_x509_key_file(x509_cred, CS certificate, | |
419 | CS privatekey, GNUTLS_X509_FMT_PEM); | |
420 | if (rc < 0) gnutls_error("gnutls_certificate", rc); | |
421 | } | |
422 | ||
423 | /* Associate the parameters with the x509 credentials structure. */ | |
424 | ||
425 | gnutls_certificate_set_dh_params(x509_cred, dh_params); | |
2b4a568d JH |
426 | |
427 | /* set the CA info for server-cert verify */ | |
428 | if (ocsp_stapling) | |
429 | gnutls_certificate_set_x509_trust_file(x509_cred, ocsp_stapling, | |
430 | GNUTLS_X509_FMT_PEM); | |
c55a77db PH |
431 | } |
432 | ||
433 | ||
434 | ||
435 | /************************************************* | |
436 | * Initialize a single GNUTLS session * | |
437 | *************************************************/ | |
438 | ||
439 | static gnutls_session | |
440 | tls_session_init(void) | |
441 | { | |
442 | gnutls_session session; | |
443 | ||
444 | gnutls_init(&session, GNUTLS_CLIENT); | |
445 | ||
446 | gnutls_cipher_set_priority(session, default_cipher_priority); | |
447 | gnutls_compression_set_priority(session, comp_priority); | |
448 | gnutls_kx_set_priority(session, kx_priority); | |
449 | gnutls_protocol_set_priority(session, protocol_priority); | |
450 | gnutls_mac_set_priority(session, mac_priority); | |
451 | ||
452 | gnutls_cred_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); | |
453 | ||
454 | gnutls_dh_set_prime_bits(session, DH_BITS); | |
455 | gnutls_db_set_cache_expiration(session, ssl_session_timeout); | |
456 | ||
457 | return session; | |
458 | } | |
459 | #endif | |
460 | ||
461 | ||
462 | /****************************************************************************/ | |
463 | /****************************************************************************/ | |
464 | ||
465 | ||
466 | ||
467 | ||
468 | /************************************************* | |
469 | * Main Program * | |
470 | *************************************************/ | |
471 | ||
4fe99a6c PP |
472 | const char * const HELP_MESSAGE = "\n\ |
473 | Usage: client\n\ | |
474 | <IP address>\n\ | |
475 | <port>\n\ | |
476 | [<outgoing interface>]\n\ | |
477 | [<cert file>]\n\ | |
478 | [<key file>]\n\ | |
479 | \n"; | |
c55a77db PH |
480 | |
481 | int main(int argc, char **argv) | |
482 | { | |
483 | struct sockaddr *s_ptr; | |
484 | struct sockaddr_in s_in4; | |
485 | char *interface = NULL; | |
486 | char *address = NULL; | |
487 | char *certfile = NULL; | |
488 | char *keyfile = NULL; | |
1ec3f27d | 489 | char *end = NULL; |
c55a77db PH |
490 | int argi = 1; |
491 | int host_af, port, s_len, rc, sock, save_errno; | |
492 | int timeout = 1; | |
493 | int tls_active = 0; | |
494 | int sent_starttls = 0; | |
495 | int tls_on_connect = 0; | |
1ec3f27d | 496 | long tmplong; |
c55a77db PH |
497 | |
498 | #if HAVE_IPV6 | |
499 | struct sockaddr_in6 s_in6; | |
500 | #endif | |
501 | ||
502 | #ifdef HAVE_OPENSSL | |
503 | SSL_CTX* ctx; | |
504 | SSL* ssl; | |
505 | #endif | |
506 | ||
507 | unsigned char outbuffer[10240]; | |
508 | unsigned char inbuffer[10240]; | |
509 | unsigned char *inptr = inbuffer; | |
510 | ||
511 | *inptr = 0; /* Buffer empty */ | |
512 | ||
513 | /* Options */ | |
514 | ||
515 | while (argc >= argi + 1 && argv[argi][0] == '-') | |
516 | { | |
4fe99a6c PP |
517 | if (strcmp(argv[argi], "-help") == 0 || |
518 | strcmp(argv[argi], "--help") == 0 || | |
519 | strcmp(argv[argi], "-h") == 0) | |
520 | { | |
dd4c8678 | 521 | puts(HELP_MESSAGE); |
4fe99a6c PP |
522 | exit(0); |
523 | } | |
c55a77db PH |
524 | if (strcmp(argv[argi], "-tls-on-connect") == 0) |
525 | { | |
526 | tls_on_connect = 1; | |
527 | argi++; | |
528 | } | |
2b4a568d | 529 | #ifdef HAVE_TLS |
f5d78688 JH |
530 | else if (strcmp(argv[argi], "-ocsp") == 0) |
531 | { | |
532 | if (argc < ++argi + 1) | |
533 | { | |
534 | fprintf(stderr, "Missing required certificate file for ocsp option\n"); | |
9ff403f8 | 535 | exit(96); |
f5d78688 JH |
536 | } |
537 | ocsp_stapling = argv[argi++]; | |
538 | } | |
2b4a568d | 539 | |
f5d78688 | 540 | #endif |
c55a77db PH |
541 | else if (argv[argi][1] == 't' && isdigit(argv[argi][2])) |
542 | { | |
1ec3f27d PP |
543 | tmplong = strtol(argv[argi]+2, &end, 10); |
544 | if (end == argv[argi]+2 || *end) | |
545 | { | |
546 | fprintf(stderr, "Failed to parse seconds from option <%s>\n", | |
547 | argv[argi]); | |
9ff403f8 | 548 | exit(95); |
1ec3f27d PP |
549 | } |
550 | if (tmplong > 10000L) | |
551 | { | |
dd4c8678 | 552 | fprintf(stderr, "Unreasonably long wait of %ld seconds requested\n", |
1ec3f27d | 553 | tmplong); |
9ff403f8 | 554 | exit(94); |
1ec3f27d PP |
555 | } |
556 | if (tmplong < 0L) | |
557 | { | |
dd4c8678 | 558 | fprintf(stderr, "Timeout must not be negative (%ld)\n", tmplong); |
9ff403f8 | 559 | exit(93); |
1ec3f27d PP |
560 | } |
561 | timeout = (int) tmplong; | |
c55a77db PH |
562 | argi++; |
563 | } | |
564 | else | |
565 | { | |
1ec3f27d | 566 | fprintf(stderr, "Unrecognized option %s\n", argv[argi]); |
9ff403f8 | 567 | exit(92); |
c55a77db PH |
568 | } |
569 | } | |
570 | ||
571 | /* Mandatory 1st arg is IP address */ | |
572 | ||
573 | if (argc < argi+1) | |
574 | { | |
1ec3f27d | 575 | fprintf(stderr, "No IP address given\n"); |
9ff403f8 | 576 | exit(91); |
c55a77db PH |
577 | } |
578 | ||
579 | address = argv[argi++]; | |
580 | host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET; | |
581 | ||
582 | /* Mandatory 2nd arg is port */ | |
583 | ||
584 | if (argc < argi+1) | |
585 | { | |
1ec3f27d | 586 | fprintf(stderr, "No port number given\n"); |
9ff403f8 | 587 | exit(90); |
c55a77db PH |
588 | } |
589 | ||
590 | port = atoi(argv[argi++]); | |
591 | ||
592 | /* Optional next arg is interface */ | |
593 | ||
594 | if (argc > argi && | |
595 | (isdigit((unsigned char)argv[argi][0]) || argv[argi][0] == ':')) | |
596 | interface = argv[argi++]; | |
597 | ||
598 | /* Any more arguments are the name of a certificate file and key file */ | |
599 | ||
600 | if (argc > argi) certfile = argv[argi++]; | |
601 | if (argc > argi) keyfile = argv[argi++]; | |
602 | ||
603 | ||
604 | #if HAVE_IPV6 | |
605 | /* For an IPv6 address, use an IPv6 sockaddr structure. */ | |
606 | ||
607 | if (host_af == AF_INET6) | |
608 | { | |
609 | s_ptr = (struct sockaddr *)&s_in6; | |
610 | s_len = sizeof(s_in6); | |
611 | } | |
612 | else | |
613 | #endif | |
614 | ||
615 | /* For an IPv4 address, use an IPv4 sockaddr structure, | |
616 | even on an IPv6 system. */ | |
617 | ||
618 | { | |
619 | s_ptr = (struct sockaddr *)&s_in4; | |
620 | s_len = sizeof(s_in4); | |
621 | } | |
622 | ||
623 | printf("Connecting to %s port %d ... ", address, port); | |
624 | ||
625 | sock = socket(host_af, SOCK_STREAM, 0); | |
626 | if (sock < 0) | |
627 | { | |
628 | printf("socket creation failed: %s\n", strerror(errno)); | |
9ff403f8 | 629 | exit(89); |
c55a77db PH |
630 | } |
631 | ||
632 | /* Bind to a specific interface if requested. On an IPv6 system, this has | |
633 | to be of the same family as the address we are calling. On an IPv4 system the | |
634 | test is redundant, but it keeps the code tidier. */ | |
635 | ||
636 | if (interface != NULL) | |
637 | { | |
638 | int interface_af = (strchr(interface, ':') != NULL)? AF_INET6 : AF_INET; | |
639 | ||
640 | if (interface_af == host_af) | |
641 | { | |
642 | #if HAVE_IPV6 | |
643 | ||
644 | /* Set up for IPv6 binding */ | |
645 | ||
646 | if (host_af == AF_INET6) | |
647 | { | |
648 | memset(&s_in6, 0, sizeof(s_in6)); | |
649 | s_in6.sin6_family = AF_INET6; | |
650 | s_in6.sin6_port = 0; | |
651 | if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1) | |
652 | { | |
653 | printf("Unable to parse \"%s\"", interface); | |
9ff403f8 | 654 | exit(88); |
c55a77db PH |
655 | } |
656 | } | |
657 | else | |
658 | #endif | |
659 | ||
660 | /* Set up for IPv4 binding */ | |
661 | ||
662 | { | |
663 | memset(&s_in4, 0, sizeof(s_in4)); | |
664 | s_in4.sin_family = AF_INET; | |
665 | s_in4.sin_port = 0; | |
666 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(interface); | |
667 | } | |
668 | ||
669 | /* Bind */ | |
670 | ||
671 | if (bind(sock, s_ptr, s_len) < 0) | |
672 | { | |
673 | printf("Unable to bind outgoing SMTP call to %s: %s", | |
674 | interface, strerror(errno)); | |
9ff403f8 | 675 | exit(87); |
c55a77db PH |
676 | } |
677 | } | |
678 | } | |
679 | ||
680 | /* Set up a remote IPv6 address */ | |
681 | ||
682 | #if HAVE_IPV6 | |
683 | if (host_af == AF_INET6) | |
684 | { | |
685 | memset(&s_in6, 0, sizeof(s_in6)); | |
686 | s_in6.sin6_family = AF_INET6; | |
687 | s_in6.sin6_port = htons(port); | |
688 | if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1) | |
689 | { | |
690 | printf("Unable to parse \"%s\"", address); | |
9ff403f8 | 691 | exit(86); |
c55a77db PH |
692 | } |
693 | } | |
694 | else | |
695 | #endif | |
696 | ||
697 | /* Set up a remote IPv4 address */ | |
698 | ||
699 | { | |
700 | memset(&s_in4, 0, sizeof(s_in4)); | |
701 | s_in4.sin_family = AF_INET; | |
702 | s_in4.sin_port = htons(port); | |
703 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(address); | |
704 | } | |
705 | ||
706 | /* SIGALRM handler crashes out */ | |
707 | ||
708 | signal(SIGALRM, sigalrm_handler_crash); | |
709 | alarm(timeout); | |
710 | rc = connect(sock, s_ptr, s_len); | |
711 | save_errno = errno; | |
712 | alarm(0); | |
713 | ||
714 | /* A failure whose error code is "Interrupted system call" is in fact | |
715 | an externally applied timeout if the signal handler has been run. */ | |
716 | ||
717 | if (rc < 0) | |
718 | { | |
719 | close(sock); | |
720 | printf("failed: %s\n", strerror(save_errno)); | |
9ff403f8 | 721 | exit(85); |
c55a77db PH |
722 | } |
723 | ||
724 | printf("connected\n"); | |
725 | ||
726 | ||
727 | /* --------------- Set up for OpenSSL --------------- */ | |
728 | ||
729 | #ifdef HAVE_OPENSSL | |
730 | SSL_library_init(); | |
731 | SSL_load_error_strings(); | |
732 | ||
733 | ctx = SSL_CTX_new(SSLv23_method()); | |
734 | if (ctx == NULL) | |
735 | { | |
736 | printf ("SSL_CTX_new failed\n"); | |
9ff403f8 | 737 | exit(84); |
c55a77db PH |
738 | } |
739 | ||
740 | if (certfile != NULL) | |
741 | { | |
742 | if (!SSL_CTX_use_certificate_file(ctx, certfile, SSL_FILETYPE_PEM)) | |
743 | { | |
744 | printf("SSL_CTX_use_certificate_file failed\n"); | |
9ff403f8 | 745 | exit(83); |
c55a77db PH |
746 | } |
747 | printf("Certificate file = %s\n", certfile); | |
748 | } | |
749 | ||
750 | if (keyfile != NULL) | |
751 | { | |
752 | if (!SSL_CTX_use_PrivateKey_file(ctx, keyfile, SSL_FILETYPE_PEM)) | |
753 | { | |
754 | printf("SSL_CTX_use_PrivateKey_file failed\n"); | |
9ff403f8 | 755 | exit(82); |
c55a77db PH |
756 | } |
757 | printf("Key file = %s\n", keyfile); | |
758 | } | |
759 | ||
760 | SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_BOTH); | |
761 | SSL_CTX_set_timeout(ctx, 200); | |
762 | SSL_CTX_set_info_callback(ctx, (void (*)())info_callback); | |
763 | #endif | |
764 | ||
765 | ||
766 | /* --------------- Set up for GnuTLS --------------- */ | |
767 | ||
768 | #ifdef HAVE_GNUTLS | |
769 | if (certfile != NULL) printf("Certificate file = %s\n", certfile); | |
770 | if (keyfile != NULL) printf("Key file = %s\n", keyfile); | |
771 | tls_init(certfile, keyfile); | |
772 | tls_session = tls_session_init(); | |
348051ad | 773 | #ifdef HAVE_OCSP |
2b4a568d JH |
774 | if (ocsp_stapling) |
775 | gnutls_ocsp_status_request_enable_client(tls_session, NULL, 0, NULL); | |
348051ad | 776 | #endif |
c55a77db PH |
777 | gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr)sock); |
778 | ||
779 | /* When the server asks for a certificate and the client does not have one, | |
780 | there is a SIGPIPE error in the gnutls_handshake() function for some reason | |
781 | that is not understood. As luck would have it, this has never hit Exim itself | |
782 | because it ignores SIGPIPE errors. Doing the same here allows it all to work as | |
783 | one wants. */ | |
784 | ||
785 | signal(SIGPIPE, SIG_IGN); | |
786 | #endif | |
787 | ||
788 | /* ---------------------------------------------- */ | |
789 | ||
790 | ||
791 | /* Start TLS session if configured to do so without STARTTLS */ | |
792 | ||
793 | #ifdef HAVE_TLS | |
794 | if (tls_on_connect) | |
795 | { | |
796 | printf("Attempting to start TLS\n"); | |
797 | ||
798 | #ifdef HAVE_OPENSSL | |
799 | tls_active = tls_start(sock, &ssl, ctx); | |
800 | #endif | |
801 | ||
802 | #ifdef HAVE_GNUTLS | |
803 | sigalrm_seen = FALSE; | |
804 | alarm(timeout); | |
805 | tls_active = gnutls_handshake(tls_session) >= 0; | |
806 | alarm(0); | |
807 | #endif | |
808 | ||
809 | if (!tls_active) | |
810 | printf("Failed to start TLS\n"); | |
348051ad | 811 | #if defined(HAVE_GNUTLS) && defined(HAVE_OCSP) |
2b4a568d JH |
812 | else if ( ocsp_stapling |
813 | && gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) | |
814 | printf("Failed to verify certificate status\n"); | |
815 | #endif | |
c55a77db PH |
816 | else |
817 | printf("Succeeded in starting TLS\n"); | |
818 | } | |
819 | #endif | |
820 | ||
821 | while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL) | |
822 | { | |
823 | int n = (int)strlen(outbuffer); | |
824 | while (n > 0 && isspace(outbuffer[n-1])) n--; | |
825 | outbuffer[n] = 0; | |
826 | ||
827 | /* Expect incoming */ | |
828 | ||
829 | if (strncmp(outbuffer, "??? ", 4) == 0) | |
830 | { | |
831 | unsigned char *lineptr; | |
832 | printf("%s\n", outbuffer); | |
833 | ||
834 | if (*inptr == 0) /* Refill input buffer */ | |
835 | { | |
836 | if (tls_active) | |
837 | { | |
838 | #ifdef HAVE_OPENSSL | |
839 | rc = SSL_read (ssl, inbuffer, sizeof(inbuffer) - 1); | |
840 | #endif | |
841 | #ifdef HAVE_GNUTLS | |
842 | rc = gnutls_record_recv(tls_session, CS inbuffer, sizeof(inbuffer) - 1); | |
843 | #endif | |
844 | } | |
845 | else | |
846 | { | |
847 | alarm(timeout); | |
848 | rc = read(sock, inbuffer, sizeof(inbuffer)); | |
849 | alarm(0); | |
850 | } | |
851 | ||
852 | if (rc < 0) | |
853 | { | |
854 | printf("Read error %s\n", strerror(errno)); | |
9ff403f8 | 855 | exit(81) ; |
c55a77db PH |
856 | } |
857 | else if (rc == 0) | |
858 | { | |
859 | printf("Unexpected EOF read\n"); | |
860 | close(sock); | |
9ff403f8 | 861 | exit(80); |
c55a77db PH |
862 | } |
863 | else | |
864 | { | |
865 | inbuffer[rc] = 0; | |
866 | inptr = inbuffer; | |
867 | } | |
868 | } | |
869 | ||
870 | lineptr = inptr; | |
871 | while (*inptr != 0 && *inptr != '\r' && *inptr != '\n') inptr++; | |
872 | if (*inptr != 0) | |
873 | { | |
874 | *inptr++ = 0; | |
875 | if (*inptr == '\n') inptr++; | |
876 | } | |
877 | ||
878 | printf("<<< %s\n", lineptr); | |
879 | if (strncmp(lineptr, outbuffer + 4, (int)strlen(outbuffer) - 4) != 0) | |
880 | { | |
881 | printf("\n******** Input mismatch ********\n"); | |
9ff403f8 | 882 | exit(79); |
c55a77db PH |
883 | } |
884 | ||
885 | #ifdef HAVE_TLS | |
886 | if (sent_starttls) | |
887 | { | |
888 | if (lineptr[0] == '2') | |
889 | { | |
2b4a568d JH |
890 | int rc; |
891 | unsigned int verify; | |
892 | ||
c55a77db PH |
893 | printf("Attempting to start TLS\n"); |
894 | fflush(stdout); | |
895 | ||
896 | #ifdef HAVE_OPENSSL | |
897 | tls_active = tls_start(sock, &ssl, ctx); | |
898 | #endif | |
899 | ||
900 | #ifdef HAVE_GNUTLS | |
901 | sigalrm_seen = FALSE; | |
902 | alarm(timeout); | |
903 | tls_active = gnutls_handshake(tls_session) >= 0; | |
904 | alarm(0); | |
905 | #endif | |
906 | ||
907 | if (!tls_active) | |
908 | { | |
909 | printf("Failed to start TLS\n"); | |
910 | fflush(stdout); | |
911 | } | |
2b4a568d JH |
912 | #ifdef HAVE_GNUTLS |
913 | else if (ocsp_stapling) | |
914 | { | |
915 | if ((rc= gnutls_certificate_verify_peers2(tls_session, &verify)) < 0) | |
916 | { | |
917 | printf("Failed to verify certificate: %s\n", gnutls_strerror(rc)); | |
918 | fflush(stdout); | |
919 | } | |
920 | else if (verify & (GNUTLS_CERT_INVALID|GNUTLS_CERT_REVOKED)) | |
921 | { | |
922 | printf("Bad certificate\n"); | |
923 | fflush(stdout); | |
924 | } | |
348051ad | 925 | #ifdef HAVE_OCSP |
2b4a568d JH |
926 | else if (gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) |
927 | { | |
928 | printf("Failed to verify certificate status\n"); | |
929 | { | |
930 | gnutls_datum_t stapling; | |
931 | gnutls_ocsp_resp_t resp; | |
932 | gnutls_datum_t printed; | |
933 | if ( (rc= gnutls_ocsp_status_request_get(tls_session, &stapling)) == 0 | |
934 | && (rc= gnutls_ocsp_resp_init(&resp)) == 0 | |
935 | && (rc= gnutls_ocsp_resp_import(resp, &stapling)) == 0 | |
936 | && (rc= gnutls_ocsp_resp_print(resp, GNUTLS_OCSP_PRINT_FULL, &printed)) == 0 | |
937 | ) | |
938 | { | |
939 | fprintf(stderr, "%.4096s", printed.data); | |
940 | gnutls_free(printed.data); | |
941 | } | |
942 | else | |
943 | (void) fprintf(stderr,"ocsp decode: %s", gnutls_strerror(rc)); | |
944 | } | |
945 | fflush(stdout); | |
946 | } | |
348051ad | 947 | #endif |
2b4a568d JH |
948 | } |
949 | #endif | |
c55a77db PH |
950 | else |
951 | printf("Succeeded in starting TLS\n"); | |
952 | } | |
953 | else printf("Abandoning TLS start attempt\n"); | |
954 | } | |
955 | sent_starttls = 0; | |
956 | #endif | |
957 | } | |
958 | ||
959 | /* Wait for a bit before proceeding */ | |
960 | ||
961 | else if (strncmp(outbuffer, "+++ ", 4) == 0) | |
962 | { | |
963 | printf("%s\n", outbuffer); | |
964 | sleep(atoi(outbuffer + 4)); | |
965 | } | |
966 | ||
967 | /* Send outgoing, but barf if unconsumed incoming */ | |
968 | ||
969 | else | |
970 | { | |
971 | unsigned char *escape; | |
972 | ||
973 | if (*inptr != 0) | |
974 | { | |
975 | printf("Unconsumed input: %s", inptr); | |
976 | printf(" About to send: %s\n", outbuffer); | |
9ff403f8 | 977 | exit(78); |
c55a77db PH |
978 | } |
979 | ||
980 | #ifdef HAVE_TLS | |
981 | ||
982 | /* Shutdown TLS */ | |
983 | ||
984 | if (strcmp(outbuffer, "stoptls") == 0 || | |
985 | strcmp(outbuffer, "STOPTLS") == 0) | |
986 | { | |
987 | if (!tls_active) | |
988 | { | |
989 | printf("STOPTLS read when TLS not active\n"); | |
9ff403f8 | 990 | exit(77); |
c55a77db PH |
991 | } |
992 | printf("Shutting down TLS encryption\n"); | |
993 | ||
994 | #ifdef HAVE_OPENSSL | |
995 | SSL_shutdown(ssl); | |
996 | SSL_free(ssl); | |
997 | #endif | |
998 | ||
999 | #ifdef HAVE_GNUTLS | |
1000 | gnutls_bye(tls_session, GNUTLS_SHUT_WR); | |
1001 | gnutls_deinit(tls_session); | |
1002 | tls_session = NULL; | |
1003 | gnutls_global_deinit(); | |
1004 | #endif | |
1005 | ||
1006 | tls_active = 0; | |
1007 | continue; | |
1008 | } | |
1009 | ||
1010 | /* Remember that we sent STARTTLS */ | |
1011 | ||
1012 | sent_starttls = (strcmp(outbuffer, "starttls") == 0 || | |
1013 | strcmp(outbuffer, "STARTTLS") == 0); | |
1014 | ||
1015 | /* Fudge: if the command is "starttls_wait", we send the starttls bit, | |
1016 | but we haven't set the flag, so that there is no negotiation. This is for | |
1017 | testing the server's timeout. */ | |
1018 | ||
1019 | if (strcmp(outbuffer, "starttls_wait") == 0) | |
1020 | { | |
1021 | outbuffer[8] = 0; | |
1022 | n = 8; | |
1023 | } | |
1024 | #endif | |
1025 | ||
1026 | printf(">>> %s\n", outbuffer); | |
1027 | strcpy(outbuffer + n, "\r\n"); | |
1028 | ||
1029 | /* Turn "\n" and "\r" into the relevant characters. This is a hack. */ | |
1030 | ||
1031 | while ((escape = strstr(outbuffer, "\\r")) != NULL) | |
1032 | { | |
1033 | *escape = '\r'; | |
1034 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
1035 | n--; | |
1036 | } | |
1037 | ||
1038 | while ((escape = strstr(outbuffer, "\\n")) != NULL) | |
1039 | { | |
1040 | *escape = '\n'; | |
1041 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
1042 | n--; | |
1043 | } | |
1044 | ||
1045 | /* OK, do it */ | |
1046 | ||
1047 | alarm(timeout); | |
1048 | if (tls_active) | |
1049 | { | |
1050 | #ifdef HAVE_OPENSSL | |
1051 | rc = SSL_write (ssl, outbuffer, n + 2); | |
1052 | #endif | |
1053 | #ifdef HAVE_GNUTLS | |
1054 | rc = gnutls_record_send(tls_session, CS outbuffer, n + 2); | |
1055 | if (rc < 0) | |
1056 | { | |
1057 | printf("GnuTLS write error: %s\n", gnutls_strerror(rc)); | |
9ff403f8 | 1058 | exit(76); |
c55a77db PH |
1059 | } |
1060 | #endif | |
1061 | } | |
1062 | else | |
1063 | { | |
1064 | rc = write(sock, outbuffer, n + 2); | |
1065 | } | |
1066 | alarm(0); | |
1067 | ||
1068 | if (rc < 0) | |
1069 | { | |
1070 | printf("Write error: %s\n", strerror(errno)); | |
9ff403f8 | 1071 | exit(75); |
c55a77db PH |
1072 | } |
1073 | } | |
1074 | } | |
1075 | ||
1076 | printf("End of script\n"); | |
1077 | close(sock); | |
1078 | ||
1079 | exit(0); | |
1080 | } | |
1081 | ||
1082 | /* End of client.c */ |