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 PP |
482 | const char * const HELP_MESSAGE = "\n\ |
483 | Usage: client\n\ | |
484 | <IP address>\n\ | |
485 | <port>\n\ | |
486 | [<outgoing interface>]\n\ | |
487 | [<cert file>]\n\ | |
488 | [<key file>]\n\ | |
489 | \n"; | |
c55a77db PH |
490 | |
491 | int main(int argc, char **argv) | |
492 | { | |
493 | struct sockaddr *s_ptr; | |
494 | struct sockaddr_in s_in4; | |
495 | char *interface = NULL; | |
496 | char *address = NULL; | |
497 | char *certfile = NULL; | |
498 | char *keyfile = NULL; | |
1ec3f27d | 499 | char *end = NULL; |
c55a77db PH |
500 | int argi = 1; |
501 | int host_af, port, s_len, rc, sock, save_errno; | |
d528a389 | 502 | int timeout = 5; |
c55a77db PH |
503 | int tls_active = 0; |
504 | int sent_starttls = 0; | |
505 | int tls_on_connect = 0; | |
1ec3f27d | 506 | long tmplong; |
c55a77db PH |
507 | |
508 | #if HAVE_IPV6 | |
509 | struct sockaddr_in6 s_in6; | |
510 | #endif | |
511 | ||
512 | #ifdef HAVE_OPENSSL | |
513 | SSL_CTX* ctx; | |
514 | SSL* ssl; | |
515 | #endif | |
516 | ||
517 | unsigned char outbuffer[10240]; | |
518 | unsigned char inbuffer[10240]; | |
519 | unsigned char *inptr = inbuffer; | |
520 | ||
521 | *inptr = 0; /* Buffer empty */ | |
522 | ||
523 | /* Options */ | |
524 | ||
525 | while (argc >= argi + 1 && argv[argi][0] == '-') | |
526 | { | |
4fe99a6c PP |
527 | if (strcmp(argv[argi], "-help") == 0 || |
528 | strcmp(argv[argi], "--help") == 0 || | |
529 | strcmp(argv[argi], "-h") == 0) | |
530 | { | |
dd4c8678 | 531 | puts(HELP_MESSAGE); |
4fe99a6c PP |
532 | exit(0); |
533 | } | |
c55a77db PH |
534 | if (strcmp(argv[argi], "-tls-on-connect") == 0) |
535 | { | |
536 | tls_on_connect = 1; | |
537 | argi++; | |
538 | } | |
2b4a568d | 539 | #ifdef HAVE_TLS |
f5d78688 JH |
540 | else if (strcmp(argv[argi], "-ocsp") == 0) |
541 | { | |
542 | if (argc < ++argi + 1) | |
543 | { | |
544 | fprintf(stderr, "Missing required certificate file for ocsp option\n"); | |
9ff403f8 | 545 | exit(96); |
f5d78688 JH |
546 | } |
547 | ocsp_stapling = argv[argi++]; | |
548 | } | |
2b4a568d | 549 | |
f5d78688 | 550 | #endif |
c55a77db PH |
551 | else if (argv[argi][1] == 't' && isdigit(argv[argi][2])) |
552 | { | |
1ec3f27d PP |
553 | tmplong = strtol(argv[argi]+2, &end, 10); |
554 | if (end == argv[argi]+2 || *end) | |
555 | { | |
556 | fprintf(stderr, "Failed to parse seconds from option <%s>\n", | |
557 | argv[argi]); | |
9ff403f8 | 558 | exit(95); |
1ec3f27d PP |
559 | } |
560 | if (tmplong > 10000L) | |
561 | { | |
dd4c8678 | 562 | fprintf(stderr, "Unreasonably long wait of %ld seconds requested\n", |
1ec3f27d | 563 | tmplong); |
9ff403f8 | 564 | exit(94); |
1ec3f27d PP |
565 | } |
566 | if (tmplong < 0L) | |
567 | { | |
dd4c8678 | 568 | fprintf(stderr, "Timeout must not be negative (%ld)\n", tmplong); |
9ff403f8 | 569 | exit(93); |
1ec3f27d PP |
570 | } |
571 | timeout = (int) tmplong; | |
c55a77db PH |
572 | argi++; |
573 | } | |
574 | else | |
575 | { | |
1ec3f27d | 576 | fprintf(stderr, "Unrecognized option %s\n", argv[argi]); |
9ff403f8 | 577 | exit(92); |
c55a77db PH |
578 | } |
579 | } | |
580 | ||
581 | /* Mandatory 1st arg is IP address */ | |
582 | ||
583 | if (argc < argi+1) | |
584 | { | |
1ec3f27d | 585 | fprintf(stderr, "No IP address given\n"); |
9ff403f8 | 586 | exit(91); |
c55a77db PH |
587 | } |
588 | ||
589 | address = argv[argi++]; | |
590 | host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET; | |
591 | ||
592 | /* Mandatory 2nd arg is port */ | |
593 | ||
594 | if (argc < argi+1) | |
595 | { | |
1ec3f27d | 596 | fprintf(stderr, "No port number given\n"); |
9ff403f8 | 597 | exit(90); |
c55a77db PH |
598 | } |
599 | ||
600 | port = atoi(argv[argi++]); | |
601 | ||
602 | /* Optional next arg is interface */ | |
603 | ||
604 | if (argc > argi && | |
605 | (isdigit((unsigned char)argv[argi][0]) || argv[argi][0] == ':')) | |
606 | interface = argv[argi++]; | |
607 | ||
608 | /* Any more arguments are the name of a certificate file and key file */ | |
609 | ||
610 | if (argc > argi) certfile = argv[argi++]; | |
611 | if (argc > argi) keyfile = argv[argi++]; | |
612 | ||
613 | ||
614 | #if HAVE_IPV6 | |
615 | /* For an IPv6 address, use an IPv6 sockaddr structure. */ | |
616 | ||
617 | if (host_af == AF_INET6) | |
618 | { | |
619 | s_ptr = (struct sockaddr *)&s_in6; | |
620 | s_len = sizeof(s_in6); | |
621 | } | |
622 | else | |
623 | #endif | |
624 | ||
625 | /* For an IPv4 address, use an IPv4 sockaddr structure, | |
626 | even on an IPv6 system. */ | |
627 | ||
628 | { | |
629 | s_ptr = (struct sockaddr *)&s_in4; | |
630 | s_len = sizeof(s_in4); | |
631 | } | |
632 | ||
633 | printf("Connecting to %s port %d ... ", address, port); | |
634 | ||
635 | sock = socket(host_af, SOCK_STREAM, 0); | |
636 | if (sock < 0) | |
637 | { | |
638 | printf("socket creation failed: %s\n", strerror(errno)); | |
9ff403f8 | 639 | exit(89); |
c55a77db PH |
640 | } |
641 | ||
642 | /* Bind to a specific interface if requested. On an IPv6 system, this has | |
643 | to be of the same family as the address we are calling. On an IPv4 system the | |
644 | test is redundant, but it keeps the code tidier. */ | |
645 | ||
646 | if (interface != NULL) | |
647 | { | |
648 | int interface_af = (strchr(interface, ':') != NULL)? AF_INET6 : AF_INET; | |
649 | ||
650 | if (interface_af == host_af) | |
651 | { | |
652 | #if HAVE_IPV6 | |
653 | ||
654 | /* Set up for IPv6 binding */ | |
655 | ||
656 | if (host_af == AF_INET6) | |
657 | { | |
658 | memset(&s_in6, 0, sizeof(s_in6)); | |
659 | s_in6.sin6_family = AF_INET6; | |
660 | s_in6.sin6_port = 0; | |
661 | if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1) | |
662 | { | |
663 | printf("Unable to parse \"%s\"", interface); | |
9ff403f8 | 664 | exit(88); |
c55a77db PH |
665 | } |
666 | } | |
667 | else | |
668 | #endif | |
669 | ||
670 | /* Set up for IPv4 binding */ | |
671 | ||
672 | { | |
673 | memset(&s_in4, 0, sizeof(s_in4)); | |
674 | s_in4.sin_family = AF_INET; | |
675 | s_in4.sin_port = 0; | |
676 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(interface); | |
677 | } | |
678 | ||
679 | /* Bind */ | |
680 | ||
681 | if (bind(sock, s_ptr, s_len) < 0) | |
682 | { | |
683 | printf("Unable to bind outgoing SMTP call to %s: %s", | |
684 | interface, strerror(errno)); | |
9ff403f8 | 685 | exit(87); |
c55a77db PH |
686 | } |
687 | } | |
688 | } | |
689 | ||
690 | /* Set up a remote IPv6 address */ | |
691 | ||
692 | #if HAVE_IPV6 | |
693 | if (host_af == AF_INET6) | |
694 | { | |
695 | memset(&s_in6, 0, sizeof(s_in6)); | |
696 | s_in6.sin6_family = AF_INET6; | |
697 | s_in6.sin6_port = htons(port); | |
698 | if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1) | |
699 | { | |
700 | printf("Unable to parse \"%s\"", address); | |
9ff403f8 | 701 | exit(86); |
c55a77db PH |
702 | } |
703 | } | |
704 | else | |
705 | #endif | |
706 | ||
707 | /* Set up a remote IPv4 address */ | |
708 | ||
709 | { | |
710 | memset(&s_in4, 0, sizeof(s_in4)); | |
711 | s_in4.sin_family = AF_INET; | |
712 | s_in4.sin_port = htons(port); | |
713 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(address); | |
714 | } | |
715 | ||
716 | /* SIGALRM handler crashes out */ | |
717 | ||
718 | signal(SIGALRM, sigalrm_handler_crash); | |
719 | alarm(timeout); | |
720 | rc = connect(sock, s_ptr, s_len); | |
721 | save_errno = errno; | |
722 | alarm(0); | |
723 | ||
724 | /* A failure whose error code is "Interrupted system call" is in fact | |
725 | an externally applied timeout if the signal handler has been run. */ | |
726 | ||
727 | if (rc < 0) | |
728 | { | |
729 | close(sock); | |
41fdef91 | 730 | printf("connect failed: %s\n", strerror(save_errno)); |
9ff403f8 | 731 | exit(85); |
c55a77db PH |
732 | } |
733 | ||
734 | printf("connected\n"); | |
735 | ||
736 | ||
737 | /* --------------- Set up for OpenSSL --------------- */ | |
738 | ||
739 | #ifdef HAVE_OPENSSL | |
740 | SSL_library_init(); | |
741 | SSL_load_error_strings(); | |
742 | ||
743 | ctx = SSL_CTX_new(SSLv23_method()); | |
744 | if (ctx == NULL) | |
745 | { | |
746 | printf ("SSL_CTX_new failed\n"); | |
9ff403f8 | 747 | exit(84); |
c55a77db PH |
748 | } |
749 | ||
750 | if (certfile != NULL) | |
751 | { | |
752 | if (!SSL_CTX_use_certificate_file(ctx, certfile, SSL_FILETYPE_PEM)) | |
753 | { | |
754 | printf("SSL_CTX_use_certificate_file failed\n"); | |
9ff403f8 | 755 | exit(83); |
c55a77db PH |
756 | } |
757 | printf("Certificate file = %s\n", certfile); | |
758 | } | |
759 | ||
760 | if (keyfile != NULL) | |
761 | { | |
762 | if (!SSL_CTX_use_PrivateKey_file(ctx, keyfile, SSL_FILETYPE_PEM)) | |
763 | { | |
764 | printf("SSL_CTX_use_PrivateKey_file failed\n"); | |
9ff403f8 | 765 | exit(82); |
c55a77db PH |
766 | } |
767 | printf("Key file = %s\n", keyfile); | |
768 | } | |
769 | ||
770 | SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_BOTH); | |
771 | SSL_CTX_set_timeout(ctx, 200); | |
772 | SSL_CTX_set_info_callback(ctx, (void (*)())info_callback); | |
773 | #endif | |
774 | ||
775 | ||
776 | /* --------------- Set up for GnuTLS --------------- */ | |
777 | ||
778 | #ifdef HAVE_GNUTLS | |
779 | if (certfile != NULL) printf("Certificate file = %s\n", certfile); | |
780 | if (keyfile != NULL) printf("Key file = %s\n", keyfile); | |
781 | tls_init(certfile, keyfile); | |
782 | tls_session = tls_session_init(); | |
348051ad | 783 | #ifdef HAVE_OCSP |
2b4a568d JH |
784 | if (ocsp_stapling) |
785 | gnutls_ocsp_status_request_enable_client(tls_session, NULL, 0, NULL); | |
348051ad | 786 | #endif |
c55a77db PH |
787 | gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr)sock); |
788 | ||
789 | /* When the server asks for a certificate and the client does not have one, | |
790 | there is a SIGPIPE error in the gnutls_handshake() function for some reason | |
791 | that is not understood. As luck would have it, this has never hit Exim itself | |
792 | because it ignores SIGPIPE errors. Doing the same here allows it all to work as | |
793 | one wants. */ | |
794 | ||
795 | signal(SIGPIPE, SIG_IGN); | |
796 | #endif | |
797 | ||
798 | /* ---------------------------------------------- */ | |
799 | ||
800 | ||
801 | /* Start TLS session if configured to do so without STARTTLS */ | |
802 | ||
803 | #ifdef HAVE_TLS | |
804 | if (tls_on_connect) | |
805 | { | |
806 | printf("Attempting to start TLS\n"); | |
807 | ||
808 | #ifdef HAVE_OPENSSL | |
809 | tls_active = tls_start(sock, &ssl, ctx); | |
810 | #endif | |
811 | ||
812 | #ifdef HAVE_GNUTLS | |
813 | sigalrm_seen = FALSE; | |
814 | alarm(timeout); | |
815 | tls_active = gnutls_handshake(tls_session) >= 0; | |
816 | alarm(0); | |
817 | #endif | |
818 | ||
819 | if (!tls_active) | |
820 | printf("Failed to start TLS\n"); | |
348051ad | 821 | #if defined(HAVE_GNUTLS) && defined(HAVE_OCSP) |
2b4a568d JH |
822 | else if ( ocsp_stapling |
823 | && gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) | |
824 | printf("Failed to verify certificate status\n"); | |
825 | #endif | |
c55a77db PH |
826 | else |
827 | printf("Succeeded in starting TLS\n"); | |
828 | } | |
829 | #endif | |
830 | ||
a719fce4 | 831 | while (fgets(CS outbuffer, sizeof(outbuffer), stdin) != NULL) |
c55a77db | 832 | { |
a719fce4 | 833 | int n = (int)strlen(CS outbuffer); |
c55a77db PH |
834 | while (n > 0 && isspace(outbuffer[n-1])) n--; |
835 | outbuffer[n] = 0; | |
836 | ||
837 | /* Expect incoming */ | |
838 | ||
a719fce4 | 839 | if (strncmp(CS outbuffer, "??? ", 4) == 0) |
c55a77db PH |
840 | { |
841 | unsigned char *lineptr; | |
842 | printf("%s\n", outbuffer); | |
843 | ||
844 | if (*inptr == 0) /* Refill input buffer */ | |
845 | { | |
846 | if (tls_active) | |
847 | { | |
848 | #ifdef HAVE_OPENSSL | |
849 | rc = SSL_read (ssl, inbuffer, sizeof(inbuffer) - 1); | |
850 | #endif | |
851 | #ifdef HAVE_GNUTLS | |
852 | rc = gnutls_record_recv(tls_session, CS inbuffer, sizeof(inbuffer) - 1); | |
853 | #endif | |
854 | } | |
855 | else | |
856 | { | |
857 | alarm(timeout); | |
858 | rc = read(sock, inbuffer, sizeof(inbuffer)); | |
859 | alarm(0); | |
860 | } | |
861 | ||
862 | if (rc < 0) | |
863 | { | |
864 | printf("Read error %s\n", strerror(errno)); | |
9ff403f8 | 865 | exit(81) ; |
c55a77db PH |
866 | } |
867 | else if (rc == 0) | |
868 | { | |
869 | printf("Unexpected EOF read\n"); | |
870 | close(sock); | |
9ff403f8 | 871 | exit(80); |
c55a77db PH |
872 | } |
873 | else | |
874 | { | |
875 | inbuffer[rc] = 0; | |
876 | inptr = inbuffer; | |
877 | } | |
878 | } | |
879 | ||
880 | lineptr = inptr; | |
881 | while (*inptr != 0 && *inptr != '\r' && *inptr != '\n') inptr++; | |
882 | if (*inptr != 0) | |
883 | { | |
884 | *inptr++ = 0; | |
885 | if (*inptr == '\n') inptr++; | |
886 | } | |
887 | ||
888 | printf("<<< %s\n", lineptr); | |
a719fce4 | 889 | if (strncmp(CS lineptr, CS outbuffer + 4, (int)strlen(CS outbuffer) - 4) != 0) |
c55a77db PH |
890 | { |
891 | printf("\n******** Input mismatch ********\n"); | |
9ff403f8 | 892 | exit(79); |
c55a77db PH |
893 | } |
894 | ||
895 | #ifdef HAVE_TLS | |
896 | if (sent_starttls) | |
897 | { | |
898 | if (lineptr[0] == '2') | |
899 | { | |
2b4a568d JH |
900 | int rc; |
901 | unsigned int verify; | |
902 | ||
c55a77db PH |
903 | printf("Attempting to start TLS\n"); |
904 | fflush(stdout); | |
905 | ||
906 | #ifdef HAVE_OPENSSL | |
907 | tls_active = tls_start(sock, &ssl, ctx); | |
908 | #endif | |
909 | ||
910 | #ifdef HAVE_GNUTLS | |
911 | sigalrm_seen = FALSE; | |
912 | alarm(timeout); | |
913 | tls_active = gnutls_handshake(tls_session) >= 0; | |
914 | alarm(0); | |
915 | #endif | |
916 | ||
917 | if (!tls_active) | |
918 | { | |
919 | printf("Failed to start TLS\n"); | |
920 | fflush(stdout); | |
921 | } | |
2b4a568d JH |
922 | #ifdef HAVE_GNUTLS |
923 | else if (ocsp_stapling) | |
924 | { | |
925 | if ((rc= gnutls_certificate_verify_peers2(tls_session, &verify)) < 0) | |
926 | { | |
927 | printf("Failed to verify certificate: %s\n", gnutls_strerror(rc)); | |
928 | fflush(stdout); | |
929 | } | |
930 | else if (verify & (GNUTLS_CERT_INVALID|GNUTLS_CERT_REVOKED)) | |
931 | { | |
932 | printf("Bad certificate\n"); | |
933 | fflush(stdout); | |
934 | } | |
348051ad | 935 | #ifdef HAVE_OCSP |
2b4a568d JH |
936 | else if (gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) |
937 | { | |
938 | printf("Failed to verify certificate status\n"); | |
939 | { | |
940 | gnutls_datum_t stapling; | |
941 | gnutls_ocsp_resp_t resp; | |
942 | gnutls_datum_t printed; | |
943 | if ( (rc= gnutls_ocsp_status_request_get(tls_session, &stapling)) == 0 | |
944 | && (rc= gnutls_ocsp_resp_init(&resp)) == 0 | |
945 | && (rc= gnutls_ocsp_resp_import(resp, &stapling)) == 0 | |
946 | && (rc= gnutls_ocsp_resp_print(resp, GNUTLS_OCSP_PRINT_FULL, &printed)) == 0 | |
947 | ) | |
948 | { | |
949 | fprintf(stderr, "%.4096s", printed.data); | |
950 | gnutls_free(printed.data); | |
951 | } | |
952 | else | |
953 | (void) fprintf(stderr,"ocsp decode: %s", gnutls_strerror(rc)); | |
954 | } | |
955 | fflush(stdout); | |
956 | } | |
348051ad | 957 | #endif |
2b4a568d JH |
958 | } |
959 | #endif | |
c55a77db PH |
960 | else |
961 | printf("Succeeded in starting TLS\n"); | |
962 | } | |
963 | else printf("Abandoning TLS start attempt\n"); | |
964 | } | |
965 | sent_starttls = 0; | |
966 | #endif | |
967 | } | |
968 | ||
969 | /* Wait for a bit before proceeding */ | |
970 | ||
a719fce4 | 971 | else if (strncmp(CS outbuffer, "+++ ", 4) == 0) |
c55a77db PH |
972 | { |
973 | printf("%s\n", outbuffer); | |
a719fce4 | 974 | sleep(atoi(CS outbuffer + 4)); |
c55a77db PH |
975 | } |
976 | ||
977 | /* Send outgoing, but barf if unconsumed incoming */ | |
978 | ||
979 | else | |
980 | { | |
981 | unsigned char *escape; | |
982 | ||
983 | if (*inptr != 0) | |
984 | { | |
985 | printf("Unconsumed input: %s", inptr); | |
986 | printf(" About to send: %s\n", outbuffer); | |
9ff403f8 | 987 | exit(78); |
c55a77db PH |
988 | } |
989 | ||
990 | #ifdef HAVE_TLS | |
991 | ||
992 | /* Shutdown TLS */ | |
993 | ||
e265af1f JH |
994 | if (strcmp(CS outbuffer, "stoptls") == 0 || |
995 | strcmp(CS outbuffer, "STOPTLS") == 0) | |
c55a77db PH |
996 | { |
997 | if (!tls_active) | |
998 | { | |
999 | printf("STOPTLS read when TLS not active\n"); | |
9ff403f8 | 1000 | exit(77); |
c55a77db PH |
1001 | } |
1002 | printf("Shutting down TLS encryption\n"); | |
1003 | ||
1004 | #ifdef HAVE_OPENSSL | |
1005 | SSL_shutdown(ssl); | |
1006 | SSL_free(ssl); | |
1007 | #endif | |
1008 | ||
1009 | #ifdef HAVE_GNUTLS | |
1010 | gnutls_bye(tls_session, GNUTLS_SHUT_WR); | |
1011 | gnutls_deinit(tls_session); | |
1012 | tls_session = NULL; | |
1013 | gnutls_global_deinit(); | |
1014 | #endif | |
1015 | ||
1016 | tls_active = 0; | |
1017 | continue; | |
1018 | } | |
1019 | ||
1020 | /* Remember that we sent STARTTLS */ | |
1021 | ||
e265af1f JH |
1022 | sent_starttls = (strcmp(CS outbuffer, "starttls") == 0 || |
1023 | strcmp(CS outbuffer, "STARTTLS") == 0); | |
c55a77db PH |
1024 | |
1025 | /* Fudge: if the command is "starttls_wait", we send the starttls bit, | |
1026 | but we haven't set the flag, so that there is no negotiation. This is for | |
1027 | testing the server's timeout. */ | |
1028 | ||
e265af1f | 1029 | if (strcmp(CS outbuffer, "starttls_wait") == 0) |
c55a77db PH |
1030 | { |
1031 | outbuffer[8] = 0; | |
1032 | n = 8; | |
1033 | } | |
1034 | #endif | |
1035 | ||
1036 | printf(">>> %s\n", outbuffer); | |
a719fce4 | 1037 | strcpy(CS outbuffer + n, "\r\n"); |
c55a77db PH |
1038 | |
1039 | /* Turn "\n" and "\r" into the relevant characters. This is a hack. */ | |
1040 | ||
a719fce4 | 1041 | while ((escape = US strstr(CS outbuffer, "\\r")) != NULL) |
c55a77db PH |
1042 | { |
1043 | *escape = '\r'; | |
1044 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
1045 | n--; | |
1046 | } | |
1047 | ||
e265af1f | 1048 | while ((escape = US strstr(CS outbuffer, "\\n")) != NULL) |
c55a77db PH |
1049 | { |
1050 | *escape = '\n'; | |
1051 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
1052 | n--; | |
1053 | } | |
1054 | ||
1055 | /* OK, do it */ | |
1056 | ||
1057 | alarm(timeout); | |
1058 | if (tls_active) | |
1059 | { | |
1060 | #ifdef HAVE_OPENSSL | |
1061 | rc = SSL_write (ssl, outbuffer, n + 2); | |
1062 | #endif | |
1063 | #ifdef HAVE_GNUTLS | |
1064 | rc = gnutls_record_send(tls_session, CS outbuffer, n + 2); | |
1065 | if (rc < 0) | |
1066 | { | |
1067 | printf("GnuTLS write error: %s\n", gnutls_strerror(rc)); | |
9ff403f8 | 1068 | exit(76); |
c55a77db PH |
1069 | } |
1070 | #endif | |
1071 | } | |
1072 | else | |
1073 | { | |
1074 | rc = write(sock, outbuffer, n + 2); | |
1075 | } | |
1076 | alarm(0); | |
1077 | ||
1078 | if (rc < 0) | |
1079 | { | |
1080 | printf("Write error: %s\n", strerror(errno)); | |
9ff403f8 | 1081 | exit(75); |
c55a77db PH |
1082 | } |
1083 | } | |
1084 | } | |
1085 | ||
1086 | printf("End of script\n"); | |
1087 | close(sock); | |
1088 | ||
1089 | exit(0); | |
1090 | } | |
1091 | ||
1092 | /* End of client.c */ |