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. */ | |
c55a77db | 61 | #ifdef HAVE_OPENSSL |
348051ad JH |
62 | # define HAVE_TLS |
63 | # include <openssl/crypto.h> | |
64 | # include <openssl/x509.h> | |
65 | # include <openssl/pem.h> | |
66 | # include <openssl/ssl.h> | |
67 | # include <openssl/err.h> | |
68 | # include <openssl/rand.h> | |
eca4debb TL |
69 | # if !defined(EXIM_HAVE_OPENSSL_TLSEXT) && !defined(DISABLE_OCSP) |
70 | # warning "OpenSSL library version too old; define DISABLE_OCSP in Makefile" | |
71 | # define DISABLE_OCSP | |
72 | # endif | |
6d68e1c7 TL |
73 | # ifndef DISABLE_OCSP |
74 | # include <openssl/ocsp.h> | |
75 | # endif | |
c55a77db PH |
76 | #endif |
77 | ||
78 | ||
79 | #ifdef HAVE_GNUTLS | |
348051ad JH |
80 | # define HAVE_TLS |
81 | # include <gnutls/gnutls.h> | |
82 | # include <gnutls/x509.h> | |
83 | # if GNUTLS_VERSION_NUMBER >= 0x030103 | |
84 | # define HAVE_OCSP | |
85 | # include <gnutls/ocsp.h> | |
86 | # endif | |
c55a77db | 87 | |
348051ad | 88 | # define DH_BITS 768 |
c55a77db PH |
89 | |
90 | /* Local static variables for GNUTLS */ | |
91 | ||
c55a77db PH |
92 | static gnutls_dh_params dh_params = NULL; |
93 | ||
94 | static gnutls_certificate_credentials_t x509_cred = NULL; | |
95 | static gnutls_session tls_session = NULL; | |
96 | ||
97 | static int ssl_session_timeout = 200; | |
98 | ||
99 | /* Priorities for TLS algorithms to use. */ | |
100 | ||
101 | static const int protocol_priority[16] = { GNUTLS_TLS1, GNUTLS_SSL3, 0 }; | |
102 | ||
103 | static const int kx_priority[16] = { | |
104 | GNUTLS_KX_RSA, | |
105 | GNUTLS_KX_DHE_DSS, | |
106 | GNUTLS_KX_DHE_RSA, | |
c55a77db PH |
107 | 0 }; |
108 | ||
109 | static int default_cipher_priority[16] = { | |
110 | GNUTLS_CIPHER_AES_256_CBC, | |
111 | GNUTLS_CIPHER_AES_128_CBC, | |
112 | GNUTLS_CIPHER_3DES_CBC, | |
113 | GNUTLS_CIPHER_ARCFOUR_128, | |
114 | 0 }; | |
115 | ||
116 | static const int mac_priority[16] = { | |
117 | GNUTLS_MAC_SHA, | |
118 | GNUTLS_MAC_MD5, | |
119 | 0 }; | |
120 | ||
121 | static const int comp_priority[16] = { GNUTLS_COMP_NULL, 0 }; | |
122 | static const int cert_type_priority[16] = { GNUTLS_CRT_X509, 0 }; | |
123 | ||
348051ad | 124 | #endif /*HAVE_GNUTLS*/ |
c55a77db PH |
125 | |
126 | ||
127 | ||
2b4a568d JH |
128 | #ifdef HAVE_TLS |
129 | char * ocsp_stapling = NULL; | |
130 | #endif | |
131 | ||
c55a77db PH |
132 | |
133 | /************************************************* | |
134 | * SIGALRM handler - crash out * | |
135 | *************************************************/ | |
136 | ||
137 | static void | |
138 | sigalrm_handler_crash(int sig) | |
139 | { | |
140 | sig = sig; /* Keep picky compilers happy */ | |
141 | printf("\nClient timed out\n"); | |
142 | exit(99); | |
143 | } | |
144 | ||
145 | ||
146 | /************************************************* | |
147 | * SIGALRM handler - set flag * | |
148 | *************************************************/ | |
149 | ||
150 | static void | |
151 | sigalrm_handler_flag(int sig) | |
152 | { | |
153 | sig = sig; /* Keep picky compilers happy */ | |
154 | sigalrm_seen = 1; | |
155 | } | |
156 | ||
157 | ||
158 | ||
159 | /****************************************************************************/ | |
160 | /****************************************************************************/ | |
161 | ||
162 | #ifdef HAVE_OPENSSL | |
f5d78688 JH |
163 | |
164 | X509_STORE * | |
165 | setup_verify(BIO *bp, char *CAfile, char *CApath) | |
166 | { | |
167 | X509_STORE *store; | |
168 | X509_LOOKUP *lookup; | |
169 | if(!(store = X509_STORE_new())) goto end; | |
170 | lookup=X509_STORE_add_lookup(store,X509_LOOKUP_file()); | |
171 | if (lookup == NULL) goto end; | |
172 | if (CAfile) { | |
173 | if(!X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM)) { | |
174 | BIO_printf(bp, "Error loading file %s\n", CAfile); | |
175 | goto end; | |
176 | } | |
177 | } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT); | |
178 | ||
179 | lookup=X509_STORE_add_lookup(store,X509_LOOKUP_hash_dir()); | |
180 | if (lookup == NULL) goto end; | |
181 | if (CApath) { | |
182 | if(!X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM)) { | |
183 | BIO_printf(bp, "Error loading directory %s\n", CApath); | |
184 | goto end; | |
185 | } | |
186 | } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT); | |
187 | ||
188 | ERR_clear_error(); | |
189 | return store; | |
190 | end: | |
191 | X509_STORE_free(store); | |
192 | return NULL; | |
193 | } | |
194 | ||
195 | ||
6d68e1c7 | 196 | #ifndef DISABLE_OCSP |
f5d78688 JH |
197 | static int |
198 | tls_client_stapling_cb(SSL *s, void *arg) | |
199 | { | |
200 | const unsigned char *p; | |
201 | int len; | |
202 | OCSP_RESPONSE *rsp; | |
203 | OCSP_BASICRESP *bs; | |
204 | char *CAfile = NULL; | |
205 | X509_STORE *store = NULL; | |
206 | int ret = 1; | |
207 | ||
208 | len = SSL_get_tlsext_status_ocsp_resp(s, &p); | |
209 | /*BIO_printf(arg, "OCSP response: ");*/ | |
210 | if (!p) | |
211 | { | |
212 | BIO_printf(arg, "no response received\n"); | |
213 | return 1; | |
214 | } | |
215 | if(!(rsp = d2i_OCSP_RESPONSE(NULL, &p, len))) | |
216 | { | |
217 | BIO_printf(arg, "response parse error\n"); | |
218 | BIO_dump_indent(arg, (char *)p, len, 4); | |
219 | return 0; | |
220 | } | |
221 | if(!(bs = OCSP_response_get1_basic(rsp))) | |
222 | { | |
223 | BIO_printf(arg, "error parsing response\n"); | |
224 | return 0; | |
225 | } | |
226 | ||
227 | CAfile = ocsp_stapling; | |
228 | if(!(store = setup_verify(arg, CAfile, NULL))) | |
229 | { | |
230 | BIO_printf(arg, "error in cert setup\n"); | |
231 | return 0; | |
232 | } | |
233 | ||
234 | /* No file of alternate certs, no options */ | |
235 | if(OCSP_basic_verify(bs, NULL, store, 0) <= 0) | |
236 | { | |
237 | BIO_printf(arg, "Response Verify Failure\n"); | |
238 | ERR_print_errors(arg); | |
239 | ret = 0; | |
240 | } | |
241 | else | |
242 | BIO_printf(arg, "Response verify OK\n"); | |
243 | ||
244 | X509_STORE_free(store); | |
245 | return ret; | |
246 | } | |
6d68e1c7 | 247 | #endif |
f5d78688 JH |
248 | |
249 | ||
c55a77db PH |
250 | /************************************************* |
251 | * Start an OpenSSL TLS session * | |
252 | *************************************************/ | |
253 | ||
2b4a568d JH |
254 | int |
255 | tls_start(int sock, SSL **ssl, SSL_CTX *ctx) | |
c55a77db PH |
256 | { |
257 | int rc; | |
e265af1f | 258 | static const unsigned char *sid_ctx = "exim"; |
c55a77db PH |
259 | |
260 | RAND_load_file("client.c", -1); /* Not *very* random! */ | |
261 | ||
262 | *ssl = SSL_new (ctx); | |
263 | SSL_set_session_id_context(*ssl, sid_ctx, strlen(sid_ctx)); | |
264 | SSL_set_fd (*ssl, sock); | |
265 | SSL_set_connect_state(*ssl); | |
266 | ||
6d68e1c7 | 267 | #ifndef DISABLE_OCSP |
f5d78688 JH |
268 | if (ocsp_stapling) |
269 | { | |
270 | SSL_CTX_set_tlsext_status_cb(ctx, tls_client_stapling_cb); | |
271 | SSL_CTX_set_tlsext_status_arg(ctx, BIO_new_fp(stdout, BIO_NOCLOSE)); | |
272 | SSL_set_tlsext_status_type(*ssl, TLSEXT_STATUSTYPE_ocsp); | |
273 | } | |
6d68e1c7 | 274 | #endif |
f5d78688 | 275 | |
c55a77db PH |
276 | signal(SIGALRM, sigalrm_handler_flag); |
277 | sigalrm_seen = 0; | |
278 | alarm(5); | |
279 | rc = SSL_connect (*ssl); | |
280 | alarm(0); | |
281 | ||
282 | if (sigalrm_seen) | |
283 | { | |
284 | printf("SSL_connect timed out\n"); | |
285 | return 0; | |
286 | } | |
287 | ||
288 | if (rc <= 0) | |
289 | { | |
290 | ERR_print_errors_fp(stdout); | |
291 | return 0; | |
292 | } | |
293 | ||
294 | printf("SSL connection using %s\n", SSL_get_cipher (*ssl)); | |
295 | return 1; | |
296 | } | |
297 | ||
298 | ||
299 | /************************************************* | |
300 | * SSL Information callback * | |
301 | *************************************************/ | |
302 | ||
303 | static void | |
304 | info_callback(SSL *s, int where, int ret) | |
305 | { | |
306 | where = where; | |
307 | ret = ret; | |
308 | printf("SSL info: %s\n", SSL_state_string_long(s)); | |
309 | } | |
310 | #endif | |
311 | ||
312 | ||
313 | /****************************************************************************/ | |
314 | /****************************************************************************/ | |
315 | ||
316 | ||
317 | #ifdef HAVE_GNUTLS | |
318 | /************************************************* | |
319 | * Handle GnuTLS error * | |
320 | *************************************************/ | |
321 | ||
322 | /* Called from lots of places when errors occur before actually starting to do | |
323 | the TLS handshake, that is, while the session is still in clear. | |
324 | ||
325 | Argument: | |
326 | prefix prefix text | |
327 | err a GnuTLS error number, or 0 if local error | |
328 | ||
329 | Returns: doesn't - it dies | |
330 | */ | |
331 | ||
332 | static void | |
333 | gnutls_error(uschar *prefix, int err) | |
334 | { | |
bb727765 | 335 | fprintf(stderr, "GnuTLS connection error: %s:", prefix); |
c55a77db PH |
336 | if (err != 0) fprintf(stderr, " %s", gnutls_strerror(err)); |
337 | fprintf(stderr, "\n"); | |
9ff403f8 | 338 | exit(98); |
c55a77db PH |
339 | } |
340 | ||
341 | ||
342 | ||
343 | /************************************************* | |
bb727765 | 344 | * Setup up DH parameters * |
c55a77db PH |
345 | *************************************************/ |
346 | ||
347 | /* For the test suite, the parameters should always be available in the spool | |
348 | directory. */ | |
349 | ||
350 | static void | |
bb727765 | 351 | init_dh(void) |
c55a77db PH |
352 | { |
353 | int fd; | |
354 | int ret; | |
355 | gnutls_datum m; | |
356 | uschar filename[200]; | |
357 | struct stat statbuf; | |
358 | ||
359 | /* Initialize the data structures for holding the parameters */ | |
360 | ||
c55a77db PH |
361 | ret = gnutls_dh_params_init(&dh_params); |
362 | if (ret < 0) gnutls_error(US"init dh_params", ret); | |
363 | ||
364 | /* Open the cache file for reading and if successful, read it and set up the | |
bb727765 | 365 | parameters. */ |
c55a77db PH |
366 | |
367 | fd = open("aux-fixed/gnutls-params", O_RDONLY, 0); | |
368 | if (fd < 0) | |
369 | { | |
370 | fprintf(stderr, "Failed to open spool/gnutls-params: %s\n", strerror(errno)); | |
9ff403f8 | 371 | exit(97); |
c55a77db PH |
372 | } |
373 | ||
374 | if (fstat(fd, &statbuf) < 0) | |
375 | { | |
376 | (void)close(fd); | |
377 | return gnutls_error(US"TLS cache stat failed", 0); | |
378 | } | |
379 | ||
380 | m.size = statbuf.st_size; | |
381 | m.data = malloc(m.size); | |
382 | if (m.data == NULL) | |
383 | return gnutls_error(US"memory allocation failed", 0); | |
384 | if (read(fd, m.data, m.size) != m.size) | |
385 | return gnutls_error(US"TLS cache read failed", 0); | |
386 | (void)close(fd); | |
387 | ||
c55a77db PH |
388 | ret = gnutls_dh_params_import_pkcs3(dh_params, &m, GNUTLS_X509_FMT_PEM); |
389 | if (ret < 0) return gnutls_error(US"DH params import", ret); | |
390 | free(m.data); | |
391 | } | |
392 | ||
393 | ||
394 | ||
395 | ||
396 | /************************************************* | |
397 | * Initialize for GnuTLS * | |
398 | *************************************************/ | |
399 | ||
400 | /* | |
401 | Arguments: | |
402 | certificate certificate file | |
403 | privatekey private key file | |
404 | */ | |
405 | ||
406 | static void | |
407 | tls_init(uschar *certificate, uschar *privatekey) | |
408 | { | |
409 | int rc; | |
410 | ||
411 | rc = gnutls_global_init(); | |
412 | if (rc < 0) gnutls_error(US"gnutls_global_init", rc); | |
413 | ||
bb727765 | 414 | /* Read D-H parameters from the cache file. */ |
c55a77db | 415 | |
bb727765 | 416 | init_dh(); |
c55a77db PH |
417 | |
418 | /* Create the credentials structure */ | |
419 | ||
420 | rc = gnutls_certificate_allocate_credentials(&x509_cred); | |
421 | if (rc < 0) gnutls_error(US"certificate_allocate_credentials", rc); | |
422 | ||
423 | /* Set the certificate and private keys */ | |
424 | ||
425 | if (certificate != NULL) | |
426 | { | |
427 | rc = gnutls_certificate_set_x509_key_file(x509_cred, CS certificate, | |
428 | CS privatekey, GNUTLS_X509_FMT_PEM); | |
429 | if (rc < 0) gnutls_error("gnutls_certificate", rc); | |
430 | } | |
431 | ||
432 | /* Associate the parameters with the x509 credentials structure. */ | |
433 | ||
434 | gnutls_certificate_set_dh_params(x509_cred, dh_params); | |
2b4a568d JH |
435 | |
436 | /* set the CA info for server-cert verify */ | |
437 | if (ocsp_stapling) | |
438 | gnutls_certificate_set_x509_trust_file(x509_cred, ocsp_stapling, | |
439 | GNUTLS_X509_FMT_PEM); | |
c55a77db PH |
440 | } |
441 | ||
442 | ||
443 | ||
444 | /************************************************* | |
445 | * Initialize a single GNUTLS session * | |
446 | *************************************************/ | |
447 | ||
448 | static gnutls_session | |
449 | tls_session_init(void) | |
450 | { | |
451 | gnutls_session session; | |
452 | ||
453 | gnutls_init(&session, GNUTLS_CLIENT); | |
454 | ||
455 | gnutls_cipher_set_priority(session, default_cipher_priority); | |
456 | gnutls_compression_set_priority(session, comp_priority); | |
457 | gnutls_kx_set_priority(session, kx_priority); | |
458 | gnutls_protocol_set_priority(session, protocol_priority); | |
459 | gnutls_mac_set_priority(session, mac_priority); | |
460 | ||
461 | gnutls_cred_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); | |
462 | ||
463 | gnutls_dh_set_prime_bits(session, DH_BITS); | |
464 | gnutls_db_set_cache_expiration(session, ssl_session_timeout); | |
465 | ||
466 | return session; | |
467 | } | |
468 | #endif | |
469 | ||
470 | ||
471 | /****************************************************************************/ | |
472 | /****************************************************************************/ | |
473 | ||
474 | ||
475 | ||
476 | ||
477 | /************************************************* | |
478 | * Main Program * | |
479 | *************************************************/ | |
480 | ||
4fe99a6c PP |
481 | const char * const HELP_MESSAGE = "\n\ |
482 | Usage: client\n\ | |
483 | <IP address>\n\ | |
484 | <port>\n\ | |
485 | [<outgoing interface>]\n\ | |
486 | [<cert file>]\n\ | |
487 | [<key file>]\n\ | |
488 | \n"; | |
c55a77db PH |
489 | |
490 | int main(int argc, char **argv) | |
491 | { | |
492 | struct sockaddr *s_ptr; | |
493 | struct sockaddr_in s_in4; | |
494 | char *interface = NULL; | |
495 | char *address = NULL; | |
496 | char *certfile = NULL; | |
497 | char *keyfile = NULL; | |
1ec3f27d | 498 | char *end = NULL; |
c55a77db PH |
499 | int argi = 1; |
500 | int host_af, port, s_len, rc, sock, save_errno; | |
d528a389 | 501 | int timeout = 5; |
c55a77db PH |
502 | int tls_active = 0; |
503 | int sent_starttls = 0; | |
504 | int tls_on_connect = 0; | |
1ec3f27d | 505 | long tmplong; |
c55a77db PH |
506 | |
507 | #if HAVE_IPV6 | |
508 | struct sockaddr_in6 s_in6; | |
509 | #endif | |
510 | ||
511 | #ifdef HAVE_OPENSSL | |
512 | SSL_CTX* ctx; | |
513 | SSL* ssl; | |
514 | #endif | |
515 | ||
516 | unsigned char outbuffer[10240]; | |
517 | unsigned char inbuffer[10240]; | |
518 | unsigned char *inptr = inbuffer; | |
519 | ||
520 | *inptr = 0; /* Buffer empty */ | |
521 | ||
522 | /* Options */ | |
523 | ||
524 | while (argc >= argi + 1 && argv[argi][0] == '-') | |
525 | { | |
4fe99a6c PP |
526 | if (strcmp(argv[argi], "-help") == 0 || |
527 | strcmp(argv[argi], "--help") == 0 || | |
528 | strcmp(argv[argi], "-h") == 0) | |
529 | { | |
dd4c8678 | 530 | puts(HELP_MESSAGE); |
4fe99a6c PP |
531 | exit(0); |
532 | } | |
c55a77db PH |
533 | if (strcmp(argv[argi], "-tls-on-connect") == 0) |
534 | { | |
535 | tls_on_connect = 1; | |
536 | argi++; | |
537 | } | |
2b4a568d | 538 | #ifdef HAVE_TLS |
f5d78688 JH |
539 | else if (strcmp(argv[argi], "-ocsp") == 0) |
540 | { | |
541 | if (argc < ++argi + 1) | |
542 | { | |
543 | fprintf(stderr, "Missing required certificate file for ocsp option\n"); | |
9ff403f8 | 544 | exit(96); |
f5d78688 JH |
545 | } |
546 | ocsp_stapling = argv[argi++]; | |
547 | } | |
2b4a568d | 548 | |
f5d78688 | 549 | #endif |
c55a77db PH |
550 | else if (argv[argi][1] == 't' && isdigit(argv[argi][2])) |
551 | { | |
1ec3f27d PP |
552 | tmplong = strtol(argv[argi]+2, &end, 10); |
553 | if (end == argv[argi]+2 || *end) | |
554 | { | |
555 | fprintf(stderr, "Failed to parse seconds from option <%s>\n", | |
556 | argv[argi]); | |
9ff403f8 | 557 | exit(95); |
1ec3f27d PP |
558 | } |
559 | if (tmplong > 10000L) | |
560 | { | |
dd4c8678 | 561 | fprintf(stderr, "Unreasonably long wait of %ld seconds requested\n", |
1ec3f27d | 562 | tmplong); |
9ff403f8 | 563 | exit(94); |
1ec3f27d PP |
564 | } |
565 | if (tmplong < 0L) | |
566 | { | |
dd4c8678 | 567 | fprintf(stderr, "Timeout must not be negative (%ld)\n", tmplong); |
9ff403f8 | 568 | exit(93); |
1ec3f27d PP |
569 | } |
570 | timeout = (int) tmplong; | |
c55a77db PH |
571 | argi++; |
572 | } | |
573 | else | |
574 | { | |
1ec3f27d | 575 | fprintf(stderr, "Unrecognized option %s\n", argv[argi]); |
9ff403f8 | 576 | exit(92); |
c55a77db PH |
577 | } |
578 | } | |
579 | ||
580 | /* Mandatory 1st arg is IP address */ | |
581 | ||
582 | if (argc < argi+1) | |
583 | { | |
1ec3f27d | 584 | fprintf(stderr, "No IP address given\n"); |
9ff403f8 | 585 | exit(91); |
c55a77db PH |
586 | } |
587 | ||
588 | address = argv[argi++]; | |
589 | host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET; | |
590 | ||
591 | /* Mandatory 2nd arg is port */ | |
592 | ||
593 | if (argc < argi+1) | |
594 | { | |
1ec3f27d | 595 | fprintf(stderr, "No port number given\n"); |
9ff403f8 | 596 | exit(90); |
c55a77db PH |
597 | } |
598 | ||
599 | port = atoi(argv[argi++]); | |
600 | ||
601 | /* Optional next arg is interface */ | |
602 | ||
603 | if (argc > argi && | |
604 | (isdigit((unsigned char)argv[argi][0]) || argv[argi][0] == ':')) | |
605 | interface = argv[argi++]; | |
606 | ||
607 | /* Any more arguments are the name of a certificate file and key file */ | |
608 | ||
609 | if (argc > argi) certfile = argv[argi++]; | |
610 | if (argc > argi) keyfile = argv[argi++]; | |
611 | ||
612 | ||
613 | #if HAVE_IPV6 | |
614 | /* For an IPv6 address, use an IPv6 sockaddr structure. */ | |
615 | ||
616 | if (host_af == AF_INET6) | |
617 | { | |
618 | s_ptr = (struct sockaddr *)&s_in6; | |
619 | s_len = sizeof(s_in6); | |
620 | } | |
621 | else | |
622 | #endif | |
623 | ||
624 | /* For an IPv4 address, use an IPv4 sockaddr structure, | |
625 | even on an IPv6 system. */ | |
626 | ||
627 | { | |
628 | s_ptr = (struct sockaddr *)&s_in4; | |
629 | s_len = sizeof(s_in4); | |
630 | } | |
631 | ||
632 | printf("Connecting to %s port %d ... ", address, port); | |
633 | ||
634 | sock = socket(host_af, SOCK_STREAM, 0); | |
635 | if (sock < 0) | |
636 | { | |
637 | printf("socket creation failed: %s\n", strerror(errno)); | |
9ff403f8 | 638 | exit(89); |
c55a77db PH |
639 | } |
640 | ||
641 | /* Bind to a specific interface if requested. On an IPv6 system, this has | |
642 | to be of the same family as the address we are calling. On an IPv4 system the | |
643 | test is redundant, but it keeps the code tidier. */ | |
644 | ||
645 | if (interface != NULL) | |
646 | { | |
647 | int interface_af = (strchr(interface, ':') != NULL)? AF_INET6 : AF_INET; | |
648 | ||
649 | if (interface_af == host_af) | |
650 | { | |
651 | #if HAVE_IPV6 | |
652 | ||
653 | /* Set up for IPv6 binding */ | |
654 | ||
655 | if (host_af == AF_INET6) | |
656 | { | |
657 | memset(&s_in6, 0, sizeof(s_in6)); | |
658 | s_in6.sin6_family = AF_INET6; | |
659 | s_in6.sin6_port = 0; | |
660 | if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1) | |
661 | { | |
662 | printf("Unable to parse \"%s\"", interface); | |
9ff403f8 | 663 | exit(88); |
c55a77db PH |
664 | } |
665 | } | |
666 | else | |
667 | #endif | |
668 | ||
669 | /* Set up for IPv4 binding */ | |
670 | ||
671 | { | |
672 | memset(&s_in4, 0, sizeof(s_in4)); | |
673 | s_in4.sin_family = AF_INET; | |
674 | s_in4.sin_port = 0; | |
675 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(interface); | |
676 | } | |
677 | ||
678 | /* Bind */ | |
679 | ||
680 | if (bind(sock, s_ptr, s_len) < 0) | |
681 | { | |
682 | printf("Unable to bind outgoing SMTP call to %s: %s", | |
683 | interface, strerror(errno)); | |
9ff403f8 | 684 | exit(87); |
c55a77db PH |
685 | } |
686 | } | |
687 | } | |
688 | ||
689 | /* Set up a remote IPv6 address */ | |
690 | ||
691 | #if HAVE_IPV6 | |
692 | if (host_af == AF_INET6) | |
693 | { | |
694 | memset(&s_in6, 0, sizeof(s_in6)); | |
695 | s_in6.sin6_family = AF_INET6; | |
696 | s_in6.sin6_port = htons(port); | |
697 | if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1) | |
698 | { | |
699 | printf("Unable to parse \"%s\"", address); | |
9ff403f8 | 700 | exit(86); |
c55a77db PH |
701 | } |
702 | } | |
703 | else | |
704 | #endif | |
705 | ||
706 | /* Set up a remote IPv4 address */ | |
707 | ||
708 | { | |
709 | memset(&s_in4, 0, sizeof(s_in4)); | |
710 | s_in4.sin_family = AF_INET; | |
711 | s_in4.sin_port = htons(port); | |
712 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(address); | |
713 | } | |
714 | ||
715 | /* SIGALRM handler crashes out */ | |
716 | ||
717 | signal(SIGALRM, sigalrm_handler_crash); | |
718 | alarm(timeout); | |
719 | rc = connect(sock, s_ptr, s_len); | |
720 | save_errno = errno; | |
721 | alarm(0); | |
722 | ||
723 | /* A failure whose error code is "Interrupted system call" is in fact | |
724 | an externally applied timeout if the signal handler has been run. */ | |
725 | ||
726 | if (rc < 0) | |
727 | { | |
728 | close(sock); | |
41fdef91 | 729 | printf("connect failed: %s\n", strerror(save_errno)); |
9ff403f8 | 730 | exit(85); |
c55a77db PH |
731 | } |
732 | ||
733 | printf("connected\n"); | |
734 | ||
735 | ||
736 | /* --------------- Set up for OpenSSL --------------- */ | |
737 | ||
738 | #ifdef HAVE_OPENSSL | |
739 | SSL_library_init(); | |
740 | SSL_load_error_strings(); | |
741 | ||
742 | ctx = SSL_CTX_new(SSLv23_method()); | |
743 | if (ctx == NULL) | |
744 | { | |
745 | printf ("SSL_CTX_new failed\n"); | |
9ff403f8 | 746 | exit(84); |
c55a77db PH |
747 | } |
748 | ||
749 | if (certfile != NULL) | |
750 | { | |
751 | if (!SSL_CTX_use_certificate_file(ctx, certfile, SSL_FILETYPE_PEM)) | |
752 | { | |
753 | printf("SSL_CTX_use_certificate_file failed\n"); | |
9ff403f8 | 754 | exit(83); |
c55a77db PH |
755 | } |
756 | printf("Certificate file = %s\n", certfile); | |
757 | } | |
758 | ||
759 | if (keyfile != NULL) | |
760 | { | |
761 | if (!SSL_CTX_use_PrivateKey_file(ctx, keyfile, SSL_FILETYPE_PEM)) | |
762 | { | |
763 | printf("SSL_CTX_use_PrivateKey_file failed\n"); | |
9ff403f8 | 764 | exit(82); |
c55a77db PH |
765 | } |
766 | printf("Key file = %s\n", keyfile); | |
767 | } | |
768 | ||
769 | SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_BOTH); | |
770 | SSL_CTX_set_timeout(ctx, 200); | |
771 | SSL_CTX_set_info_callback(ctx, (void (*)())info_callback); | |
772 | #endif | |
773 | ||
774 | ||
775 | /* --------------- Set up for GnuTLS --------------- */ | |
776 | ||
777 | #ifdef HAVE_GNUTLS | |
778 | if (certfile != NULL) printf("Certificate file = %s\n", certfile); | |
779 | if (keyfile != NULL) printf("Key file = %s\n", keyfile); | |
780 | tls_init(certfile, keyfile); | |
781 | tls_session = tls_session_init(); | |
348051ad | 782 | #ifdef HAVE_OCSP |
2b4a568d JH |
783 | if (ocsp_stapling) |
784 | gnutls_ocsp_status_request_enable_client(tls_session, NULL, 0, NULL); | |
348051ad | 785 | #endif |
c55a77db PH |
786 | gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr)sock); |
787 | ||
788 | /* When the server asks for a certificate and the client does not have one, | |
789 | there is a SIGPIPE error in the gnutls_handshake() function for some reason | |
790 | that is not understood. As luck would have it, this has never hit Exim itself | |
791 | because it ignores SIGPIPE errors. Doing the same here allows it all to work as | |
792 | one wants. */ | |
793 | ||
794 | signal(SIGPIPE, SIG_IGN); | |
795 | #endif | |
796 | ||
797 | /* ---------------------------------------------- */ | |
798 | ||
799 | ||
800 | /* Start TLS session if configured to do so without STARTTLS */ | |
801 | ||
802 | #ifdef HAVE_TLS | |
803 | if (tls_on_connect) | |
804 | { | |
805 | printf("Attempting to start TLS\n"); | |
806 | ||
807 | #ifdef HAVE_OPENSSL | |
808 | tls_active = tls_start(sock, &ssl, ctx); | |
809 | #endif | |
810 | ||
811 | #ifdef HAVE_GNUTLS | |
812 | sigalrm_seen = FALSE; | |
813 | alarm(timeout); | |
814 | tls_active = gnutls_handshake(tls_session) >= 0; | |
815 | alarm(0); | |
816 | #endif | |
817 | ||
818 | if (!tls_active) | |
819 | printf("Failed to start TLS\n"); | |
348051ad | 820 | #if defined(HAVE_GNUTLS) && defined(HAVE_OCSP) |
2b4a568d JH |
821 | else if ( ocsp_stapling |
822 | && gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) | |
823 | printf("Failed to verify certificate status\n"); | |
824 | #endif | |
c55a77db PH |
825 | else |
826 | printf("Succeeded in starting TLS\n"); | |
827 | } | |
828 | #endif | |
829 | ||
a719fce4 | 830 | while (fgets(CS outbuffer, sizeof(outbuffer), stdin) != NULL) |
c55a77db | 831 | { |
a719fce4 | 832 | int n = (int)strlen(CS outbuffer); |
c55a77db PH |
833 | while (n > 0 && isspace(outbuffer[n-1])) n--; |
834 | outbuffer[n] = 0; | |
835 | ||
836 | /* Expect incoming */ | |
837 | ||
a719fce4 | 838 | if (strncmp(CS outbuffer, "??? ", 4) == 0) |
c55a77db PH |
839 | { |
840 | unsigned char *lineptr; | |
841 | printf("%s\n", outbuffer); | |
842 | ||
843 | if (*inptr == 0) /* Refill input buffer */ | |
844 | { | |
845 | if (tls_active) | |
846 | { | |
847 | #ifdef HAVE_OPENSSL | |
848 | rc = SSL_read (ssl, inbuffer, sizeof(inbuffer) - 1); | |
849 | #endif | |
850 | #ifdef HAVE_GNUTLS | |
851 | rc = gnutls_record_recv(tls_session, CS inbuffer, sizeof(inbuffer) - 1); | |
852 | #endif | |
853 | } | |
854 | else | |
855 | { | |
856 | alarm(timeout); | |
857 | rc = read(sock, inbuffer, sizeof(inbuffer)); | |
858 | alarm(0); | |
859 | } | |
860 | ||
861 | if (rc < 0) | |
862 | { | |
863 | printf("Read error %s\n", strerror(errno)); | |
9ff403f8 | 864 | exit(81) ; |
c55a77db PH |
865 | } |
866 | else if (rc == 0) | |
867 | { | |
868 | printf("Unexpected EOF read\n"); | |
869 | close(sock); | |
9ff403f8 | 870 | exit(80); |
c55a77db PH |
871 | } |
872 | else | |
873 | { | |
874 | inbuffer[rc] = 0; | |
875 | inptr = inbuffer; | |
876 | } | |
877 | } | |
878 | ||
879 | lineptr = inptr; | |
880 | while (*inptr != 0 && *inptr != '\r' && *inptr != '\n') inptr++; | |
881 | if (*inptr != 0) | |
882 | { | |
883 | *inptr++ = 0; | |
884 | if (*inptr == '\n') inptr++; | |
885 | } | |
886 | ||
887 | printf("<<< %s\n", lineptr); | |
a719fce4 | 888 | if (strncmp(CS lineptr, CS outbuffer + 4, (int)strlen(CS outbuffer) - 4) != 0) |
c55a77db PH |
889 | { |
890 | printf("\n******** Input mismatch ********\n"); | |
9ff403f8 | 891 | exit(79); |
c55a77db PH |
892 | } |
893 | ||
894 | #ifdef HAVE_TLS | |
895 | if (sent_starttls) | |
896 | { | |
897 | if (lineptr[0] == '2') | |
898 | { | |
2b4a568d JH |
899 | int rc; |
900 | unsigned int verify; | |
901 | ||
c55a77db PH |
902 | printf("Attempting to start TLS\n"); |
903 | fflush(stdout); | |
904 | ||
905 | #ifdef HAVE_OPENSSL | |
906 | tls_active = tls_start(sock, &ssl, ctx); | |
907 | #endif | |
908 | ||
909 | #ifdef HAVE_GNUTLS | |
910 | sigalrm_seen = FALSE; | |
911 | alarm(timeout); | |
912 | tls_active = gnutls_handshake(tls_session) >= 0; | |
913 | alarm(0); | |
914 | #endif | |
915 | ||
916 | if (!tls_active) | |
917 | { | |
918 | printf("Failed to start TLS\n"); | |
919 | fflush(stdout); | |
920 | } | |
2b4a568d JH |
921 | #ifdef HAVE_GNUTLS |
922 | else if (ocsp_stapling) | |
923 | { | |
924 | if ((rc= gnutls_certificate_verify_peers2(tls_session, &verify)) < 0) | |
925 | { | |
926 | printf("Failed to verify certificate: %s\n", gnutls_strerror(rc)); | |
927 | fflush(stdout); | |
928 | } | |
929 | else if (verify & (GNUTLS_CERT_INVALID|GNUTLS_CERT_REVOKED)) | |
930 | { | |
931 | printf("Bad certificate\n"); | |
932 | fflush(stdout); | |
933 | } | |
348051ad | 934 | #ifdef HAVE_OCSP |
2b4a568d JH |
935 | else if (gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) |
936 | { | |
937 | printf("Failed to verify certificate status\n"); | |
938 | { | |
939 | gnutls_datum_t stapling; | |
940 | gnutls_ocsp_resp_t resp; | |
941 | gnutls_datum_t printed; | |
942 | if ( (rc= gnutls_ocsp_status_request_get(tls_session, &stapling)) == 0 | |
943 | && (rc= gnutls_ocsp_resp_init(&resp)) == 0 | |
944 | && (rc= gnutls_ocsp_resp_import(resp, &stapling)) == 0 | |
945 | && (rc= gnutls_ocsp_resp_print(resp, GNUTLS_OCSP_PRINT_FULL, &printed)) == 0 | |
946 | ) | |
947 | { | |
948 | fprintf(stderr, "%.4096s", printed.data); | |
949 | gnutls_free(printed.data); | |
950 | } | |
951 | else | |
952 | (void) fprintf(stderr,"ocsp decode: %s", gnutls_strerror(rc)); | |
953 | } | |
954 | fflush(stdout); | |
955 | } | |
348051ad | 956 | #endif |
2b4a568d JH |
957 | } |
958 | #endif | |
c55a77db PH |
959 | else |
960 | printf("Succeeded in starting TLS\n"); | |
961 | } | |
962 | else printf("Abandoning TLS start attempt\n"); | |
963 | } | |
964 | sent_starttls = 0; | |
965 | #endif | |
966 | } | |
967 | ||
968 | /* Wait for a bit before proceeding */ | |
969 | ||
a719fce4 | 970 | else if (strncmp(CS outbuffer, "+++ ", 4) == 0) |
c55a77db PH |
971 | { |
972 | printf("%s\n", outbuffer); | |
a719fce4 | 973 | sleep(atoi(CS outbuffer + 4)); |
c55a77db PH |
974 | } |
975 | ||
976 | /* Send outgoing, but barf if unconsumed incoming */ | |
977 | ||
978 | else | |
979 | { | |
980 | unsigned char *escape; | |
981 | ||
982 | if (*inptr != 0) | |
983 | { | |
984 | printf("Unconsumed input: %s", inptr); | |
985 | printf(" About to send: %s\n", outbuffer); | |
9ff403f8 | 986 | exit(78); |
c55a77db PH |
987 | } |
988 | ||
989 | #ifdef HAVE_TLS | |
990 | ||
991 | /* Shutdown TLS */ | |
992 | ||
e265af1f JH |
993 | if (strcmp(CS outbuffer, "stoptls") == 0 || |
994 | strcmp(CS outbuffer, "STOPTLS") == 0) | |
c55a77db PH |
995 | { |
996 | if (!tls_active) | |
997 | { | |
998 | printf("STOPTLS read when TLS not active\n"); | |
9ff403f8 | 999 | exit(77); |
c55a77db PH |
1000 | } |
1001 | printf("Shutting down TLS encryption\n"); | |
1002 | ||
1003 | #ifdef HAVE_OPENSSL | |
1004 | SSL_shutdown(ssl); | |
1005 | SSL_free(ssl); | |
1006 | #endif | |
1007 | ||
1008 | #ifdef HAVE_GNUTLS | |
1009 | gnutls_bye(tls_session, GNUTLS_SHUT_WR); | |
1010 | gnutls_deinit(tls_session); | |
1011 | tls_session = NULL; | |
1012 | gnutls_global_deinit(); | |
1013 | #endif | |
1014 | ||
1015 | tls_active = 0; | |
1016 | continue; | |
1017 | } | |
1018 | ||
1019 | /* Remember that we sent STARTTLS */ | |
1020 | ||
e265af1f JH |
1021 | sent_starttls = (strcmp(CS outbuffer, "starttls") == 0 || |
1022 | strcmp(CS outbuffer, "STARTTLS") == 0); | |
c55a77db PH |
1023 | |
1024 | /* Fudge: if the command is "starttls_wait", we send the starttls bit, | |
1025 | but we haven't set the flag, so that there is no negotiation. This is for | |
1026 | testing the server's timeout. */ | |
1027 | ||
e265af1f | 1028 | if (strcmp(CS outbuffer, "starttls_wait") == 0) |
c55a77db PH |
1029 | { |
1030 | outbuffer[8] = 0; | |
1031 | n = 8; | |
1032 | } | |
1033 | #endif | |
1034 | ||
1035 | printf(">>> %s\n", outbuffer); | |
a719fce4 | 1036 | strcpy(CS outbuffer + n, "\r\n"); |
c55a77db PH |
1037 | |
1038 | /* Turn "\n" and "\r" into the relevant characters. This is a hack. */ | |
1039 | ||
a719fce4 | 1040 | while ((escape = US strstr(CS outbuffer, "\\r")) != NULL) |
c55a77db PH |
1041 | { |
1042 | *escape = '\r'; | |
1043 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
1044 | n--; | |
1045 | } | |
1046 | ||
e265af1f | 1047 | while ((escape = US strstr(CS outbuffer, "\\n")) != NULL) |
c55a77db PH |
1048 | { |
1049 | *escape = '\n'; | |
1050 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
1051 | n--; | |
1052 | } | |
1053 | ||
1054 | /* OK, do it */ | |
1055 | ||
1056 | alarm(timeout); | |
1057 | if (tls_active) | |
1058 | { | |
1059 | #ifdef HAVE_OPENSSL | |
1060 | rc = SSL_write (ssl, outbuffer, n + 2); | |
1061 | #endif | |
1062 | #ifdef HAVE_GNUTLS | |
1063 | rc = gnutls_record_send(tls_session, CS outbuffer, n + 2); | |
1064 | if (rc < 0) | |
1065 | { | |
1066 | printf("GnuTLS write error: %s\n", gnutls_strerror(rc)); | |
9ff403f8 | 1067 | exit(76); |
c55a77db PH |
1068 | } |
1069 | #endif | |
1070 | } | |
1071 | else | |
1072 | { | |
1073 | rc = write(sock, outbuffer, n + 2); | |
1074 | } | |
1075 | alarm(0); | |
1076 | ||
1077 | if (rc < 0) | |
1078 | { | |
1079 | printf("Write error: %s\n", strerror(errno)); | |
9ff403f8 | 1080 | exit(75); |
c55a77db PH |
1081 | } |
1082 | } | |
1083 | } | |
1084 | ||
1085 | printf("End of script\n"); | |
1086 | close(sock); | |
1087 | ||
1088 | exit(0); | |
1089 | } | |
1090 | ||
1091 | /* End of client.c */ |