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> | |
839a3b0d JH |
69 | |
70 | # if OPENSSL_VERSION_NUMBER < 0x0090806fL && !defined(DISABLE_OCSP) && !defined(OPENSSL_NO_TLSEXT) | |
eca4debb TL |
71 | # warning "OpenSSL library version too old; define DISABLE_OCSP in Makefile" |
72 | # define DISABLE_OCSP | |
73 | # endif | |
6d68e1c7 TL |
74 | # ifndef DISABLE_OCSP |
75 | # include <openssl/ocsp.h> | |
76 | # endif | |
c55a77db PH |
77 | #endif |
78 | ||
79 | ||
80 | #ifdef HAVE_GNUTLS | |
348051ad JH |
81 | # define HAVE_TLS |
82 | # include <gnutls/gnutls.h> | |
83 | # include <gnutls/x509.h> | |
84 | # if GNUTLS_VERSION_NUMBER >= 0x030103 | |
85 | # define HAVE_OCSP | |
86 | # include <gnutls/ocsp.h> | |
87 | # endif | |
c55a77db | 88 | |
348051ad | 89 | # define DH_BITS 768 |
c55a77db PH |
90 | |
91 | /* Local static variables for GNUTLS */ | |
92 | ||
c55a77db PH |
93 | static gnutls_dh_params dh_params = NULL; |
94 | ||
95 | static gnutls_certificate_credentials_t x509_cred = NULL; | |
96 | static gnutls_session tls_session = NULL; | |
97 | ||
98 | static int ssl_session_timeout = 200; | |
99 | ||
100 | /* Priorities for TLS algorithms to use. */ | |
101 | ||
102 | static const int protocol_priority[16] = { GNUTLS_TLS1, GNUTLS_SSL3, 0 }; | |
103 | ||
104 | static const int kx_priority[16] = { | |
105 | GNUTLS_KX_RSA, | |
106 | GNUTLS_KX_DHE_DSS, | |
107 | GNUTLS_KX_DHE_RSA, | |
c55a77db PH |
108 | 0 }; |
109 | ||
110 | static int default_cipher_priority[16] = { | |
111 | GNUTLS_CIPHER_AES_256_CBC, | |
112 | GNUTLS_CIPHER_AES_128_CBC, | |
113 | GNUTLS_CIPHER_3DES_CBC, | |
114 | GNUTLS_CIPHER_ARCFOUR_128, | |
115 | 0 }; | |
116 | ||
117 | static const int mac_priority[16] = { | |
118 | GNUTLS_MAC_SHA, | |
119 | GNUTLS_MAC_MD5, | |
120 | 0 }; | |
121 | ||
122 | static const int comp_priority[16] = { GNUTLS_COMP_NULL, 0 }; | |
123 | static const int cert_type_priority[16] = { GNUTLS_CRT_X509, 0 }; | |
124 | ||
348051ad | 125 | #endif /*HAVE_GNUTLS*/ |
c55a77db PH |
126 | |
127 | ||
128 | ||
2b4a568d JH |
129 | #ifdef HAVE_TLS |
130 | char * ocsp_stapling = NULL; | |
131 | #endif | |
132 | ||
c55a77db PH |
133 | |
134 | /************************************************* | |
135 | * SIGALRM handler - crash out * | |
136 | *************************************************/ | |
137 | ||
138 | static void | |
139 | sigalrm_handler_crash(int sig) | |
140 | { | |
141 | sig = sig; /* Keep picky compilers happy */ | |
142 | printf("\nClient timed out\n"); | |
143 | exit(99); | |
144 | } | |
145 | ||
146 | ||
147 | /************************************************* | |
148 | * SIGALRM handler - set flag * | |
149 | *************************************************/ | |
150 | ||
151 | static void | |
152 | sigalrm_handler_flag(int sig) | |
153 | { | |
154 | sig = sig; /* Keep picky compilers happy */ | |
155 | sigalrm_seen = 1; | |
156 | } | |
157 | ||
158 | ||
159 | ||
160 | /****************************************************************************/ | |
161 | /****************************************************************************/ | |
162 | ||
163 | #ifdef HAVE_OPENSSL | |
f5d78688 JH |
164 | |
165 | X509_STORE * | |
166 | setup_verify(BIO *bp, char *CAfile, char *CApath) | |
167 | { | |
168 | X509_STORE *store; | |
169 | X509_LOOKUP *lookup; | |
170 | if(!(store = X509_STORE_new())) goto end; | |
171 | lookup=X509_STORE_add_lookup(store,X509_LOOKUP_file()); | |
172 | if (lookup == NULL) goto end; | |
173 | if (CAfile) { | |
174 | if(!X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM)) { | |
175 | BIO_printf(bp, "Error loading file %s\n", CAfile); | |
176 | goto end; | |
177 | } | |
178 | } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT); | |
179 | ||
180 | lookup=X509_STORE_add_lookup(store,X509_LOOKUP_hash_dir()); | |
181 | if (lookup == NULL) goto end; | |
182 | if (CApath) { | |
183 | if(!X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM)) { | |
184 | BIO_printf(bp, "Error loading directory %s\n", CApath); | |
185 | goto end; | |
186 | } | |
187 | } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT); | |
188 | ||
189 | ERR_clear_error(); | |
190 | return store; | |
191 | end: | |
192 | X509_STORE_free(store); | |
193 | return NULL; | |
194 | } | |
195 | ||
196 | ||
6d68e1c7 | 197 | #ifndef DISABLE_OCSP |
f5d78688 JH |
198 | static int |
199 | tls_client_stapling_cb(SSL *s, void *arg) | |
200 | { | |
201 | const unsigned char *p; | |
202 | int len; | |
203 | OCSP_RESPONSE *rsp; | |
204 | OCSP_BASICRESP *bs; | |
205 | char *CAfile = NULL; | |
206 | X509_STORE *store = NULL; | |
207 | int ret = 1; | |
208 | ||
209 | len = SSL_get_tlsext_status_ocsp_resp(s, &p); | |
210 | /*BIO_printf(arg, "OCSP response: ");*/ | |
211 | if (!p) | |
212 | { | |
213 | BIO_printf(arg, "no response received\n"); | |
214 | return 1; | |
215 | } | |
216 | if(!(rsp = d2i_OCSP_RESPONSE(NULL, &p, len))) | |
217 | { | |
218 | BIO_printf(arg, "response parse error\n"); | |
219 | BIO_dump_indent(arg, (char *)p, len, 4); | |
220 | return 0; | |
221 | } | |
222 | if(!(bs = OCSP_response_get1_basic(rsp))) | |
223 | { | |
224 | BIO_printf(arg, "error parsing response\n"); | |
225 | return 0; | |
226 | } | |
227 | ||
228 | CAfile = ocsp_stapling; | |
229 | if(!(store = setup_verify(arg, CAfile, NULL))) | |
230 | { | |
231 | BIO_printf(arg, "error in cert setup\n"); | |
232 | return 0; | |
233 | } | |
234 | ||
235 | /* No file of alternate certs, no options */ | |
236 | if(OCSP_basic_verify(bs, NULL, store, 0) <= 0) | |
237 | { | |
238 | BIO_printf(arg, "Response Verify Failure\n"); | |
239 | ERR_print_errors(arg); | |
240 | ret = 0; | |
241 | } | |
242 | else | |
243 | BIO_printf(arg, "Response verify OK\n"); | |
244 | ||
245 | X509_STORE_free(store); | |
246 | return ret; | |
247 | } | |
6d68e1c7 | 248 | #endif |
f5d78688 JH |
249 | |
250 | ||
c55a77db PH |
251 | /************************************************* |
252 | * Start an OpenSSL TLS session * | |
253 | *************************************************/ | |
254 | ||
2b4a568d JH |
255 | int |
256 | tls_start(int sock, SSL **ssl, SSL_CTX *ctx) | |
c55a77db PH |
257 | { |
258 | int rc; | |
57cde6e4 | 259 | static const unsigned char *sid_ctx = US"exim"; |
c55a77db PH |
260 | |
261 | RAND_load_file("client.c", -1); /* Not *very* random! */ | |
262 | ||
263 | *ssl = SSL_new (ctx); | |
57cde6e4 | 264 | SSL_set_session_id_context(*ssl, sid_ctx, strlen(CS sid_ctx)); |
c55a77db PH |
265 | SSL_set_fd (*ssl, sock); |
266 | SSL_set_connect_state(*ssl); | |
267 | ||
6d68e1c7 | 268 | #ifndef DISABLE_OCSP |
f5d78688 JH |
269 | if (ocsp_stapling) |
270 | { | |
271 | SSL_CTX_set_tlsext_status_cb(ctx, tls_client_stapling_cb); | |
272 | SSL_CTX_set_tlsext_status_arg(ctx, BIO_new_fp(stdout, BIO_NOCLOSE)); | |
273 | SSL_set_tlsext_status_type(*ssl, TLSEXT_STATUSTYPE_ocsp); | |
274 | } | |
6d68e1c7 | 275 | #endif |
f5d78688 | 276 | |
c55a77db PH |
277 | signal(SIGALRM, sigalrm_handler_flag); |
278 | sigalrm_seen = 0; | |
279 | alarm(5); | |
280 | rc = SSL_connect (*ssl); | |
281 | alarm(0); | |
282 | ||
283 | if (sigalrm_seen) | |
284 | { | |
285 | printf("SSL_connect timed out\n"); | |
286 | return 0; | |
287 | } | |
288 | ||
289 | if (rc <= 0) | |
290 | { | |
291 | ERR_print_errors_fp(stdout); | |
292 | return 0; | |
293 | } | |
294 | ||
295 | printf("SSL connection using %s\n", SSL_get_cipher (*ssl)); | |
296 | return 1; | |
297 | } | |
298 | ||
299 | ||
300 | /************************************************* | |
301 | * SSL Information callback * | |
302 | *************************************************/ | |
303 | ||
304 | static void | |
305 | info_callback(SSL *s, int where, int ret) | |
306 | { | |
307 | where = where; | |
308 | ret = ret; | |
309 | printf("SSL info: %s\n", SSL_state_string_long(s)); | |
310 | } | |
311 | #endif | |
312 | ||
313 | ||
314 | /****************************************************************************/ | |
315 | /****************************************************************************/ | |
316 | ||
317 | ||
318 | #ifdef HAVE_GNUTLS | |
319 | /************************************************* | |
320 | * Handle GnuTLS error * | |
321 | *************************************************/ | |
322 | ||
323 | /* Called from lots of places when errors occur before actually starting to do | |
324 | the TLS handshake, that is, while the session is still in clear. | |
325 | ||
326 | Argument: | |
327 | prefix prefix text | |
328 | err a GnuTLS error number, or 0 if local error | |
329 | ||
330 | Returns: doesn't - it dies | |
331 | */ | |
332 | ||
333 | static void | |
334 | gnutls_error(uschar *prefix, int err) | |
335 | { | |
bb727765 | 336 | fprintf(stderr, "GnuTLS connection error: %s:", prefix); |
c55a77db PH |
337 | if (err != 0) fprintf(stderr, " %s", gnutls_strerror(err)); |
338 | fprintf(stderr, "\n"); | |
9ff403f8 | 339 | exit(98); |
c55a77db PH |
340 | } |
341 | ||
342 | ||
343 | ||
344 | /************************************************* | |
bb727765 | 345 | * Setup up DH parameters * |
c55a77db PH |
346 | *************************************************/ |
347 | ||
348 | /* For the test suite, the parameters should always be available in the spool | |
349 | directory. */ | |
350 | ||
351 | static void | |
bb727765 | 352 | init_dh(void) |
c55a77db PH |
353 | { |
354 | int fd; | |
355 | int ret; | |
356 | gnutls_datum m; | |
357 | uschar filename[200]; | |
358 | struct stat statbuf; | |
359 | ||
360 | /* Initialize the data structures for holding the parameters */ | |
361 | ||
c55a77db PH |
362 | ret = gnutls_dh_params_init(&dh_params); |
363 | if (ret < 0) gnutls_error(US"init dh_params", ret); | |
364 | ||
365 | /* Open the cache file for reading and if successful, read it and set up the | |
bb727765 | 366 | parameters. */ |
c55a77db PH |
367 | |
368 | fd = open("aux-fixed/gnutls-params", O_RDONLY, 0); | |
369 | if (fd < 0) | |
370 | { | |
371 | fprintf(stderr, "Failed to open spool/gnutls-params: %s\n", strerror(errno)); | |
9ff403f8 | 372 | exit(97); |
c55a77db PH |
373 | } |
374 | ||
375 | if (fstat(fd, &statbuf) < 0) | |
376 | { | |
377 | (void)close(fd); | |
378 | return gnutls_error(US"TLS cache stat failed", 0); | |
379 | } | |
380 | ||
381 | m.size = statbuf.st_size; | |
382 | m.data = malloc(m.size); | |
383 | if (m.data == NULL) | |
384 | return gnutls_error(US"memory allocation failed", 0); | |
385 | if (read(fd, m.data, m.size) != m.size) | |
386 | return gnutls_error(US"TLS cache read failed", 0); | |
387 | (void)close(fd); | |
388 | ||
c55a77db PH |
389 | ret = gnutls_dh_params_import_pkcs3(dh_params, &m, GNUTLS_X509_FMT_PEM); |
390 | if (ret < 0) return gnutls_error(US"DH params import", ret); | |
391 | free(m.data); | |
392 | } | |
393 | ||
394 | ||
395 | ||
396 | ||
397 | /************************************************* | |
398 | * Initialize for GnuTLS * | |
399 | *************************************************/ | |
400 | ||
401 | /* | |
402 | Arguments: | |
403 | certificate certificate file | |
404 | privatekey private key file | |
405 | */ | |
406 | ||
407 | static void | |
408 | tls_init(uschar *certificate, uschar *privatekey) | |
409 | { | |
410 | int rc; | |
411 | ||
412 | rc = gnutls_global_init(); | |
413 | if (rc < 0) gnutls_error(US"gnutls_global_init", rc); | |
414 | ||
bb727765 | 415 | /* Read D-H parameters from the cache file. */ |
c55a77db | 416 | |
bb727765 | 417 | init_dh(); |
c55a77db PH |
418 | |
419 | /* Create the credentials structure */ | |
420 | ||
421 | rc = gnutls_certificate_allocate_credentials(&x509_cred); | |
422 | if (rc < 0) gnutls_error(US"certificate_allocate_credentials", rc); | |
423 | ||
424 | /* Set the certificate and private keys */ | |
425 | ||
426 | if (certificate != NULL) | |
427 | { | |
428 | rc = gnutls_certificate_set_x509_key_file(x509_cred, CS certificate, | |
429 | CS privatekey, GNUTLS_X509_FMT_PEM); | |
430 | if (rc < 0) gnutls_error("gnutls_certificate", rc); | |
431 | } | |
432 | ||
433 | /* Associate the parameters with the x509 credentials structure. */ | |
434 | ||
435 | gnutls_certificate_set_dh_params(x509_cred, dh_params); | |
2b4a568d JH |
436 | |
437 | /* set the CA info for server-cert verify */ | |
438 | if (ocsp_stapling) | |
439 | gnutls_certificate_set_x509_trust_file(x509_cred, ocsp_stapling, | |
440 | GNUTLS_X509_FMT_PEM); | |
c55a77db PH |
441 | } |
442 | ||
443 | ||
444 | ||
445 | /************************************************* | |
446 | * Initialize a single GNUTLS session * | |
447 | *************************************************/ | |
448 | ||
449 | static gnutls_session | |
450 | tls_session_init(void) | |
451 | { | |
452 | gnutls_session session; | |
453 | ||
454 | gnutls_init(&session, GNUTLS_CLIENT); | |
455 | ||
456 | gnutls_cipher_set_priority(session, default_cipher_priority); | |
457 | gnutls_compression_set_priority(session, comp_priority); | |
458 | gnutls_kx_set_priority(session, kx_priority); | |
459 | gnutls_protocol_set_priority(session, protocol_priority); | |
460 | gnutls_mac_set_priority(session, mac_priority); | |
461 | ||
462 | gnutls_cred_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); | |
463 | ||
464 | gnutls_dh_set_prime_bits(session, DH_BITS); | |
465 | gnutls_db_set_cache_expiration(session, ssl_session_timeout); | |
466 | ||
467 | return session; | |
468 | } | |
469 | #endif | |
470 | ||
471 | ||
472 | /****************************************************************************/ | |
473 | /****************************************************************************/ | |
474 | ||
475 | ||
476 | ||
477 | ||
478 | /************************************************* | |
479 | * Main Program * | |
480 | *************************************************/ | |
481 | ||
4fe99a6c | 482 | const char * const HELP_MESSAGE = "\n\ |
972e83f5 HSHR |
483 | Usage: client\n" |
484 | #ifdef HAVE_TLS | |
485 | "\ | |
486 | [-tls-on-connect]\n\ | |
487 | [-ocsp]\n" | |
488 | #endif | |
489 | "\ | |
490 | [-tn] n seconds timeout\n\ | |
4fe99a6c PP |
491 | <IP address>\n\ |
492 | <port>\n\ | |
493 | [<outgoing interface>]\n\ | |
494 | [<cert file>]\n\ | |
495 | [<key file>]\n\ | |
496 | \n"; | |
c55a77db PH |
497 | |
498 | int main(int argc, char **argv) | |
499 | { | |
500 | struct sockaddr *s_ptr; | |
501 | struct sockaddr_in s_in4; | |
502 | char *interface = NULL; | |
503 | char *address = NULL; | |
504 | char *certfile = NULL; | |
505 | char *keyfile = NULL; | |
1ec3f27d | 506 | char *end = NULL; |
c55a77db PH |
507 | int argi = 1; |
508 | int host_af, port, s_len, rc, sock, save_errno; | |
d528a389 | 509 | int timeout = 5; |
c55a77db PH |
510 | int tls_active = 0; |
511 | int sent_starttls = 0; | |
512 | int tls_on_connect = 0; | |
1ec3f27d | 513 | long tmplong; |
c55a77db PH |
514 | |
515 | #if HAVE_IPV6 | |
516 | struct sockaddr_in6 s_in6; | |
517 | #endif | |
518 | ||
519 | #ifdef HAVE_OPENSSL | |
520 | SSL_CTX* ctx; | |
521 | SSL* ssl; | |
522 | #endif | |
523 | ||
524 | unsigned char outbuffer[10240]; | |
525 | unsigned char inbuffer[10240]; | |
526 | unsigned char *inptr = inbuffer; | |
527 | ||
528 | *inptr = 0; /* Buffer empty */ | |
529 | ||
530 | /* Options */ | |
531 | ||
532 | while (argc >= argi + 1 && argv[argi][0] == '-') | |
533 | { | |
4fe99a6c PP |
534 | if (strcmp(argv[argi], "-help") == 0 || |
535 | strcmp(argv[argi], "--help") == 0 || | |
536 | strcmp(argv[argi], "-h") == 0) | |
537 | { | |
dd4c8678 | 538 | puts(HELP_MESSAGE); |
4fe99a6c PP |
539 | exit(0); |
540 | } | |
c55a77db PH |
541 | if (strcmp(argv[argi], "-tls-on-connect") == 0) |
542 | { | |
543 | tls_on_connect = 1; | |
544 | argi++; | |
545 | } | |
2b4a568d | 546 | #ifdef HAVE_TLS |
f5d78688 JH |
547 | else if (strcmp(argv[argi], "-ocsp") == 0) |
548 | { | |
549 | if (argc < ++argi + 1) | |
550 | { | |
551 | fprintf(stderr, "Missing required certificate file for ocsp option\n"); | |
9ff403f8 | 552 | exit(96); |
f5d78688 JH |
553 | } |
554 | ocsp_stapling = argv[argi++]; | |
555 | } | |
2b4a568d | 556 | |
f5d78688 | 557 | #endif |
c55a77db PH |
558 | else if (argv[argi][1] == 't' && isdigit(argv[argi][2])) |
559 | { | |
1ec3f27d PP |
560 | tmplong = strtol(argv[argi]+2, &end, 10); |
561 | if (end == argv[argi]+2 || *end) | |
562 | { | |
563 | fprintf(stderr, "Failed to parse seconds from option <%s>\n", | |
564 | argv[argi]); | |
9ff403f8 | 565 | exit(95); |
1ec3f27d PP |
566 | } |
567 | if (tmplong > 10000L) | |
568 | { | |
dd4c8678 | 569 | fprintf(stderr, "Unreasonably long wait of %ld seconds requested\n", |
1ec3f27d | 570 | tmplong); |
9ff403f8 | 571 | exit(94); |
1ec3f27d PP |
572 | } |
573 | if (tmplong < 0L) | |
574 | { | |
dd4c8678 | 575 | fprintf(stderr, "Timeout must not be negative (%ld)\n", tmplong); |
9ff403f8 | 576 | exit(93); |
1ec3f27d PP |
577 | } |
578 | timeout = (int) tmplong; | |
c55a77db PH |
579 | argi++; |
580 | } | |
581 | else | |
582 | { | |
1ec3f27d | 583 | fprintf(stderr, "Unrecognized option %s\n", argv[argi]); |
9ff403f8 | 584 | exit(92); |
c55a77db PH |
585 | } |
586 | } | |
587 | ||
588 | /* Mandatory 1st arg is IP address */ | |
589 | ||
590 | if (argc < argi+1) | |
591 | { | |
1ec3f27d | 592 | fprintf(stderr, "No IP address given\n"); |
9ff403f8 | 593 | exit(91); |
c55a77db PH |
594 | } |
595 | ||
596 | address = argv[argi++]; | |
597 | host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET; | |
598 | ||
599 | /* Mandatory 2nd arg is port */ | |
600 | ||
601 | if (argc < argi+1) | |
602 | { | |
1ec3f27d | 603 | fprintf(stderr, "No port number given\n"); |
9ff403f8 | 604 | exit(90); |
c55a77db PH |
605 | } |
606 | ||
607 | port = atoi(argv[argi++]); | |
608 | ||
609 | /* Optional next arg is interface */ | |
610 | ||
611 | if (argc > argi && | |
612 | (isdigit((unsigned char)argv[argi][0]) || argv[argi][0] == ':')) | |
613 | interface = argv[argi++]; | |
614 | ||
615 | /* Any more arguments are the name of a certificate file and key file */ | |
616 | ||
617 | if (argc > argi) certfile = argv[argi++]; | |
618 | if (argc > argi) keyfile = argv[argi++]; | |
619 | ||
620 | ||
621 | #if HAVE_IPV6 | |
622 | /* For an IPv6 address, use an IPv6 sockaddr structure. */ | |
623 | ||
624 | if (host_af == AF_INET6) | |
625 | { | |
626 | s_ptr = (struct sockaddr *)&s_in6; | |
627 | s_len = sizeof(s_in6); | |
628 | } | |
629 | else | |
630 | #endif | |
631 | ||
632 | /* For an IPv4 address, use an IPv4 sockaddr structure, | |
633 | even on an IPv6 system. */ | |
634 | ||
635 | { | |
636 | s_ptr = (struct sockaddr *)&s_in4; | |
637 | s_len = sizeof(s_in4); | |
638 | } | |
639 | ||
640 | printf("Connecting to %s port %d ... ", address, port); | |
641 | ||
642 | sock = socket(host_af, SOCK_STREAM, 0); | |
643 | if (sock < 0) | |
644 | { | |
645 | printf("socket creation failed: %s\n", strerror(errno)); | |
9ff403f8 | 646 | exit(89); |
c55a77db PH |
647 | } |
648 | ||
649 | /* Bind to a specific interface if requested. On an IPv6 system, this has | |
650 | to be of the same family as the address we are calling. On an IPv4 system the | |
651 | test is redundant, but it keeps the code tidier. */ | |
652 | ||
653 | if (interface != NULL) | |
654 | { | |
655 | int interface_af = (strchr(interface, ':') != NULL)? AF_INET6 : AF_INET; | |
656 | ||
657 | if (interface_af == host_af) | |
658 | { | |
659 | #if HAVE_IPV6 | |
660 | ||
661 | /* Set up for IPv6 binding */ | |
662 | ||
663 | if (host_af == AF_INET6) | |
664 | { | |
665 | memset(&s_in6, 0, sizeof(s_in6)); | |
666 | s_in6.sin6_family = AF_INET6; | |
667 | s_in6.sin6_port = 0; | |
668 | if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1) | |
669 | { | |
670 | printf("Unable to parse \"%s\"", interface); | |
9ff403f8 | 671 | exit(88); |
c55a77db PH |
672 | } |
673 | } | |
674 | else | |
675 | #endif | |
676 | ||
677 | /* Set up for IPv4 binding */ | |
678 | ||
679 | { | |
680 | memset(&s_in4, 0, sizeof(s_in4)); | |
681 | s_in4.sin_family = AF_INET; | |
682 | s_in4.sin_port = 0; | |
683 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(interface); | |
684 | } | |
685 | ||
686 | /* Bind */ | |
687 | ||
688 | if (bind(sock, s_ptr, s_len) < 0) | |
689 | { | |
690 | printf("Unable to bind outgoing SMTP call to %s: %s", | |
691 | interface, strerror(errno)); | |
9ff403f8 | 692 | exit(87); |
c55a77db PH |
693 | } |
694 | } | |
695 | } | |
696 | ||
697 | /* Set up a remote IPv6 address */ | |
698 | ||
699 | #if HAVE_IPV6 | |
700 | if (host_af == AF_INET6) | |
701 | { | |
702 | memset(&s_in6, 0, sizeof(s_in6)); | |
703 | s_in6.sin6_family = AF_INET6; | |
704 | s_in6.sin6_port = htons(port); | |
705 | if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1) | |
706 | { | |
707 | printf("Unable to parse \"%s\"", address); | |
9ff403f8 | 708 | exit(86); |
c55a77db PH |
709 | } |
710 | } | |
711 | else | |
712 | #endif | |
713 | ||
714 | /* Set up a remote IPv4 address */ | |
715 | ||
716 | { | |
717 | memset(&s_in4, 0, sizeof(s_in4)); | |
718 | s_in4.sin_family = AF_INET; | |
719 | s_in4.sin_port = htons(port); | |
720 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(address); | |
721 | } | |
722 | ||
723 | /* SIGALRM handler crashes out */ | |
724 | ||
725 | signal(SIGALRM, sigalrm_handler_crash); | |
726 | alarm(timeout); | |
727 | rc = connect(sock, s_ptr, s_len); | |
728 | save_errno = errno; | |
729 | alarm(0); | |
730 | ||
731 | /* A failure whose error code is "Interrupted system call" is in fact | |
732 | an externally applied timeout if the signal handler has been run. */ | |
733 | ||
734 | if (rc < 0) | |
735 | { | |
736 | close(sock); | |
41fdef91 | 737 | printf("connect failed: %s\n", strerror(save_errno)); |
9ff403f8 | 738 | exit(85); |
c55a77db PH |
739 | } |
740 | ||
741 | printf("connected\n"); | |
742 | ||
743 | ||
744 | /* --------------- Set up for OpenSSL --------------- */ | |
745 | ||
746 | #ifdef HAVE_OPENSSL | |
747 | SSL_library_init(); | |
748 | SSL_load_error_strings(); | |
749 | ||
750 | ctx = SSL_CTX_new(SSLv23_method()); | |
751 | if (ctx == NULL) | |
752 | { | |
753 | printf ("SSL_CTX_new failed\n"); | |
9ff403f8 | 754 | exit(84); |
c55a77db PH |
755 | } |
756 | ||
757 | if (certfile != NULL) | |
758 | { | |
759 | if (!SSL_CTX_use_certificate_file(ctx, certfile, SSL_FILETYPE_PEM)) | |
760 | { | |
761 | printf("SSL_CTX_use_certificate_file failed\n"); | |
9ff403f8 | 762 | exit(83); |
c55a77db PH |
763 | } |
764 | printf("Certificate file = %s\n", certfile); | |
765 | } | |
766 | ||
767 | if (keyfile != NULL) | |
768 | { | |
769 | if (!SSL_CTX_use_PrivateKey_file(ctx, keyfile, SSL_FILETYPE_PEM)) | |
770 | { | |
771 | printf("SSL_CTX_use_PrivateKey_file failed\n"); | |
9ff403f8 | 772 | exit(82); |
c55a77db PH |
773 | } |
774 | printf("Key file = %s\n", keyfile); | |
775 | } | |
776 | ||
777 | SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_BOTH); | |
778 | SSL_CTX_set_timeout(ctx, 200); | |
779 | SSL_CTX_set_info_callback(ctx, (void (*)())info_callback); | |
780 | #endif | |
781 | ||
782 | ||
783 | /* --------------- Set up for GnuTLS --------------- */ | |
784 | ||
785 | #ifdef HAVE_GNUTLS | |
786 | if (certfile != NULL) printf("Certificate file = %s\n", certfile); | |
787 | if (keyfile != NULL) printf("Key file = %s\n", keyfile); | |
788 | tls_init(certfile, keyfile); | |
789 | tls_session = tls_session_init(); | |
348051ad | 790 | #ifdef HAVE_OCSP |
2b4a568d JH |
791 | if (ocsp_stapling) |
792 | gnutls_ocsp_status_request_enable_client(tls_session, NULL, 0, NULL); | |
348051ad | 793 | #endif |
c55a77db PH |
794 | gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr)sock); |
795 | ||
796 | /* When the server asks for a certificate and the client does not have one, | |
797 | there is a SIGPIPE error in the gnutls_handshake() function for some reason | |
798 | that is not understood. As luck would have it, this has never hit Exim itself | |
799 | because it ignores SIGPIPE errors. Doing the same here allows it all to work as | |
800 | one wants. */ | |
801 | ||
802 | signal(SIGPIPE, SIG_IGN); | |
803 | #endif | |
804 | ||
805 | /* ---------------------------------------------- */ | |
806 | ||
807 | ||
808 | /* Start TLS session if configured to do so without STARTTLS */ | |
809 | ||
810 | #ifdef HAVE_TLS | |
811 | if (tls_on_connect) | |
812 | { | |
813 | printf("Attempting to start TLS\n"); | |
814 | ||
815 | #ifdef HAVE_OPENSSL | |
816 | tls_active = tls_start(sock, &ssl, ctx); | |
817 | #endif | |
818 | ||
819 | #ifdef HAVE_GNUTLS | |
820 | sigalrm_seen = FALSE; | |
821 | alarm(timeout); | |
822 | tls_active = gnutls_handshake(tls_session) >= 0; | |
823 | alarm(0); | |
824 | #endif | |
825 | ||
826 | if (!tls_active) | |
827 | printf("Failed to start TLS\n"); | |
348051ad | 828 | #if defined(HAVE_GNUTLS) && defined(HAVE_OCSP) |
2b4a568d JH |
829 | else if ( ocsp_stapling |
830 | && gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) | |
831 | printf("Failed to verify certificate status\n"); | |
832 | #endif | |
c55a77db PH |
833 | else |
834 | printf("Succeeded in starting TLS\n"); | |
835 | } | |
836 | #endif | |
837 | ||
a719fce4 | 838 | while (fgets(CS outbuffer, sizeof(outbuffer), stdin) != NULL) |
c55a77db | 839 | { |
a719fce4 | 840 | int n = (int)strlen(CS outbuffer); |
c55a77db PH |
841 | while (n > 0 && isspace(outbuffer[n-1])) n--; |
842 | outbuffer[n] = 0; | |
843 | ||
844 | /* Expect incoming */ | |
845 | ||
a719fce4 | 846 | if (strncmp(CS outbuffer, "??? ", 4) == 0) |
c55a77db PH |
847 | { |
848 | unsigned char *lineptr; | |
849 | printf("%s\n", outbuffer); | |
850 | ||
851 | if (*inptr == 0) /* Refill input buffer */ | |
852 | { | |
853 | if (tls_active) | |
854 | { | |
855 | #ifdef HAVE_OPENSSL | |
856 | rc = SSL_read (ssl, inbuffer, sizeof(inbuffer) - 1); | |
857 | #endif | |
858 | #ifdef HAVE_GNUTLS | |
859 | rc = gnutls_record_recv(tls_session, CS inbuffer, sizeof(inbuffer) - 1); | |
860 | #endif | |
861 | } | |
862 | else | |
863 | { | |
864 | alarm(timeout); | |
865 | rc = read(sock, inbuffer, sizeof(inbuffer)); | |
866 | alarm(0); | |
867 | } | |
868 | ||
869 | if (rc < 0) | |
870 | { | |
871 | printf("Read error %s\n", strerror(errno)); | |
9ff403f8 | 872 | exit(81) ; |
c55a77db PH |
873 | } |
874 | else if (rc == 0) | |
875 | { | |
876 | printf("Unexpected EOF read\n"); | |
877 | close(sock); | |
9ff403f8 | 878 | exit(80); |
c55a77db PH |
879 | } |
880 | else | |
881 | { | |
882 | inbuffer[rc] = 0; | |
883 | inptr = inbuffer; | |
884 | } | |
885 | } | |
886 | ||
887 | lineptr = inptr; | |
888 | while (*inptr != 0 && *inptr != '\r' && *inptr != '\n') inptr++; | |
889 | if (*inptr != 0) | |
890 | { | |
891 | *inptr++ = 0; | |
892 | if (*inptr == '\n') inptr++; | |
893 | } | |
894 | ||
895 | printf("<<< %s\n", lineptr); | |
a719fce4 | 896 | if (strncmp(CS lineptr, CS outbuffer + 4, (int)strlen(CS outbuffer) - 4) != 0) |
c55a77db PH |
897 | { |
898 | printf("\n******** Input mismatch ********\n"); | |
9ff403f8 | 899 | exit(79); |
c55a77db PH |
900 | } |
901 | ||
902 | #ifdef HAVE_TLS | |
903 | if (sent_starttls) | |
904 | { | |
905 | if (lineptr[0] == '2') | |
906 | { | |
2b4a568d JH |
907 | int rc; |
908 | unsigned int verify; | |
909 | ||
c55a77db PH |
910 | printf("Attempting to start TLS\n"); |
911 | fflush(stdout); | |
912 | ||
913 | #ifdef HAVE_OPENSSL | |
914 | tls_active = tls_start(sock, &ssl, ctx); | |
915 | #endif | |
916 | ||
917 | #ifdef HAVE_GNUTLS | |
918 | sigalrm_seen = FALSE; | |
919 | alarm(timeout); | |
920 | tls_active = gnutls_handshake(tls_session) >= 0; | |
921 | alarm(0); | |
922 | #endif | |
923 | ||
924 | if (!tls_active) | |
925 | { | |
926 | printf("Failed to start TLS\n"); | |
927 | fflush(stdout); | |
928 | } | |
2b4a568d JH |
929 | #ifdef HAVE_GNUTLS |
930 | else if (ocsp_stapling) | |
931 | { | |
932 | if ((rc= gnutls_certificate_verify_peers2(tls_session, &verify)) < 0) | |
933 | { | |
934 | printf("Failed to verify certificate: %s\n", gnutls_strerror(rc)); | |
935 | fflush(stdout); | |
936 | } | |
937 | else if (verify & (GNUTLS_CERT_INVALID|GNUTLS_CERT_REVOKED)) | |
938 | { | |
939 | printf("Bad certificate\n"); | |
940 | fflush(stdout); | |
941 | } | |
348051ad | 942 | #ifdef HAVE_OCSP |
2b4a568d JH |
943 | else if (gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) |
944 | { | |
945 | printf("Failed to verify certificate status\n"); | |
946 | { | |
947 | gnutls_datum_t stapling; | |
948 | gnutls_ocsp_resp_t resp; | |
949 | gnutls_datum_t printed; | |
950 | if ( (rc= gnutls_ocsp_status_request_get(tls_session, &stapling)) == 0 | |
951 | && (rc= gnutls_ocsp_resp_init(&resp)) == 0 | |
952 | && (rc= gnutls_ocsp_resp_import(resp, &stapling)) == 0 | |
953 | && (rc= gnutls_ocsp_resp_print(resp, GNUTLS_OCSP_PRINT_FULL, &printed)) == 0 | |
954 | ) | |
955 | { | |
956 | fprintf(stderr, "%.4096s", printed.data); | |
957 | gnutls_free(printed.data); | |
958 | } | |
959 | else | |
960 | (void) fprintf(stderr,"ocsp decode: %s", gnutls_strerror(rc)); | |
961 | } | |
962 | fflush(stdout); | |
963 | } | |
348051ad | 964 | #endif |
2b4a568d JH |
965 | } |
966 | #endif | |
c55a77db PH |
967 | else |
968 | printf("Succeeded in starting TLS\n"); | |
969 | } | |
970 | else printf("Abandoning TLS start attempt\n"); | |
971 | } | |
972 | sent_starttls = 0; | |
973 | #endif | |
974 | } | |
975 | ||
976 | /* Wait for a bit before proceeding */ | |
977 | ||
a719fce4 | 978 | else if (strncmp(CS outbuffer, "+++ ", 4) == 0) |
c55a77db PH |
979 | { |
980 | printf("%s\n", outbuffer); | |
a719fce4 | 981 | sleep(atoi(CS outbuffer + 4)); |
c55a77db PH |
982 | } |
983 | ||
984 | /* Send outgoing, but barf if unconsumed incoming */ | |
985 | ||
986 | else | |
987 | { | |
988 | unsigned char *escape; | |
989 | ||
990 | if (*inptr != 0) | |
991 | { | |
992 | printf("Unconsumed input: %s", inptr); | |
993 | printf(" About to send: %s\n", outbuffer); | |
9ff403f8 | 994 | exit(78); |
c55a77db PH |
995 | } |
996 | ||
997 | #ifdef HAVE_TLS | |
998 | ||
999 | /* Shutdown TLS */ | |
1000 | ||
e265af1f JH |
1001 | if (strcmp(CS outbuffer, "stoptls") == 0 || |
1002 | strcmp(CS outbuffer, "STOPTLS") == 0) | |
c55a77db PH |
1003 | { |
1004 | if (!tls_active) | |
1005 | { | |
1006 | printf("STOPTLS read when TLS not active\n"); | |
9ff403f8 | 1007 | exit(77); |
c55a77db PH |
1008 | } |
1009 | printf("Shutting down TLS encryption\n"); | |
1010 | ||
1011 | #ifdef HAVE_OPENSSL | |
1012 | SSL_shutdown(ssl); | |
1013 | SSL_free(ssl); | |
1014 | #endif | |
1015 | ||
1016 | #ifdef HAVE_GNUTLS | |
1017 | gnutls_bye(tls_session, GNUTLS_SHUT_WR); | |
1018 | gnutls_deinit(tls_session); | |
1019 | tls_session = NULL; | |
1020 | gnutls_global_deinit(); | |
1021 | #endif | |
1022 | ||
1023 | tls_active = 0; | |
1024 | continue; | |
1025 | } | |
1026 | ||
1027 | /* Remember that we sent STARTTLS */ | |
1028 | ||
e265af1f JH |
1029 | sent_starttls = (strcmp(CS outbuffer, "starttls") == 0 || |
1030 | strcmp(CS outbuffer, "STARTTLS") == 0); | |
c55a77db PH |
1031 | |
1032 | /* Fudge: if the command is "starttls_wait", we send the starttls bit, | |
1033 | but we haven't set the flag, so that there is no negotiation. This is for | |
1034 | testing the server's timeout. */ | |
1035 | ||
e265af1f | 1036 | if (strcmp(CS outbuffer, "starttls_wait") == 0) |
c55a77db PH |
1037 | { |
1038 | outbuffer[8] = 0; | |
1039 | n = 8; | |
1040 | } | |
1041 | #endif | |
1042 | ||
1043 | printf(">>> %s\n", outbuffer); | |
a719fce4 | 1044 | strcpy(CS outbuffer + n, "\r\n"); |
c55a77db PH |
1045 | |
1046 | /* Turn "\n" and "\r" into the relevant characters. This is a hack. */ | |
1047 | ||
a719fce4 | 1048 | while ((escape = US strstr(CS outbuffer, "\\r")) != NULL) |
c55a77db PH |
1049 | { |
1050 | *escape = '\r'; | |
1051 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
1052 | n--; | |
1053 | } | |
1054 | ||
e265af1f | 1055 | while ((escape = US strstr(CS outbuffer, "\\n")) != NULL) |
c55a77db PH |
1056 | { |
1057 | *escape = '\n'; | |
1058 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
1059 | n--; | |
1060 | } | |
1061 | ||
1062 | /* OK, do it */ | |
1063 | ||
1064 | alarm(timeout); | |
1065 | if (tls_active) | |
1066 | { | |
1067 | #ifdef HAVE_OPENSSL | |
1068 | rc = SSL_write (ssl, outbuffer, n + 2); | |
1069 | #endif | |
1070 | #ifdef HAVE_GNUTLS | |
1071 | rc = gnutls_record_send(tls_session, CS outbuffer, n + 2); | |
1072 | if (rc < 0) | |
1073 | { | |
1074 | printf("GnuTLS write error: %s\n", gnutls_strerror(rc)); | |
9ff403f8 | 1075 | exit(76); |
c55a77db PH |
1076 | } |
1077 | #endif | |
1078 | } | |
1079 | else | |
1080 | { | |
1081 | rc = write(sock, outbuffer, n + 2); | |
1082 | } | |
1083 | alarm(0); | |
1084 | ||
1085 | if (rc < 0) | |
1086 | { | |
1087 | printf("Write error: %s\n", strerror(errno)); | |
9ff403f8 | 1088 | exit(75); |
c55a77db PH |
1089 | } |
1090 | } | |
1091 | } | |
1092 | ||
1093 | printf("End of script\n"); | |
1094 | close(sock); | |
1095 | ||
1096 | exit(0); | |
1097 | } | |
1098 | ||
1099 | /* End of client.c */ |