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> | |
5597be31 JH |
87 | # endif |
88 | # ifndef GNUTLS_NO_EXTENSIONS | |
89 | # define GNUTLS_NO_EXTENSIONS 0 | |
348051ad | 90 | # endif |
c55a77db | 91 | |
348051ad | 92 | # define DH_BITS 768 |
c55a77db PH |
93 | |
94 | /* Local static variables for GNUTLS */ | |
95 | ||
fc4fcc34 | 96 | static gnutls_dh_params_t dh_params = NULL; |
c55a77db PH |
97 | |
98 | static gnutls_certificate_credentials_t x509_cred = NULL; | |
fc4fcc34 | 99 | static gnutls_session_t tls_session = NULL; |
c55a77db PH |
100 | |
101 | static int ssl_session_timeout = 200; | |
102 | ||
103 | /* Priorities for TLS algorithms to use. */ | |
104 | ||
fc4fcc34 | 105 | #if GNUTLS_VERSION_NUMBER < 0x030400 |
c55a77db PH |
106 | static const int protocol_priority[16] = { GNUTLS_TLS1, GNUTLS_SSL3, 0 }; |
107 | ||
108 | static const int kx_priority[16] = { | |
109 | GNUTLS_KX_RSA, | |
110 | GNUTLS_KX_DHE_DSS, | |
111 | GNUTLS_KX_DHE_RSA, | |
c55a77db PH |
112 | 0 }; |
113 | ||
114 | static int default_cipher_priority[16] = { | |
115 | GNUTLS_CIPHER_AES_256_CBC, | |
116 | GNUTLS_CIPHER_AES_128_CBC, | |
117 | GNUTLS_CIPHER_3DES_CBC, | |
118 | GNUTLS_CIPHER_ARCFOUR_128, | |
119 | 0 }; | |
120 | ||
121 | static const int mac_priority[16] = { | |
122 | GNUTLS_MAC_SHA, | |
123 | GNUTLS_MAC_MD5, | |
124 | 0 }; | |
125 | ||
126 | static const int comp_priority[16] = { GNUTLS_COMP_NULL, 0 }; | |
fc4fcc34 | 127 | #endif |
c55a77db | 128 | |
348051ad | 129 | #endif /*HAVE_GNUTLS*/ |
c55a77db PH |
130 | |
131 | ||
132 | ||
2b4a568d JH |
133 | #ifdef HAVE_TLS |
134 | char * ocsp_stapling = NULL; | |
135 | #endif | |
136 | ||
c55a77db PH |
137 | |
138 | /************************************************* | |
139 | * SIGALRM handler - crash out * | |
140 | *************************************************/ | |
141 | ||
142 | static void | |
143 | sigalrm_handler_crash(int sig) | |
144 | { | |
145 | sig = sig; /* Keep picky compilers happy */ | |
146 | printf("\nClient timed out\n"); | |
147 | exit(99); | |
148 | } | |
149 | ||
150 | ||
151 | /************************************************* | |
152 | * SIGALRM handler - set flag * | |
153 | *************************************************/ | |
154 | ||
155 | static void | |
156 | sigalrm_handler_flag(int sig) | |
157 | { | |
158 | sig = sig; /* Keep picky compilers happy */ | |
159 | sigalrm_seen = 1; | |
160 | } | |
161 | ||
162 | ||
163 | ||
164 | /****************************************************************************/ | |
165 | /****************************************************************************/ | |
166 | ||
167 | #ifdef HAVE_OPENSSL | |
f5d78688 JH |
168 | |
169 | X509_STORE * | |
170 | setup_verify(BIO *bp, char *CAfile, char *CApath) | |
171 | { | |
172 | X509_STORE *store; | |
173 | X509_LOOKUP *lookup; | |
174 | if(!(store = X509_STORE_new())) goto end; | |
175 | lookup=X509_STORE_add_lookup(store,X509_LOOKUP_file()); | |
176 | if (lookup == NULL) goto end; | |
177 | if (CAfile) { | |
178 | if(!X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM)) { | |
179 | BIO_printf(bp, "Error loading file %s\n", CAfile); | |
180 | goto end; | |
181 | } | |
182 | } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT); | |
183 | ||
184 | lookup=X509_STORE_add_lookup(store,X509_LOOKUP_hash_dir()); | |
185 | if (lookup == NULL) goto end; | |
186 | if (CApath) { | |
187 | if(!X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM)) { | |
188 | BIO_printf(bp, "Error loading directory %s\n", CApath); | |
189 | goto end; | |
190 | } | |
191 | } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT); | |
192 | ||
193 | ERR_clear_error(); | |
194 | return store; | |
195 | end: | |
196 | X509_STORE_free(store); | |
197 | return NULL; | |
198 | } | |
199 | ||
200 | ||
6d68e1c7 | 201 | #ifndef DISABLE_OCSP |
f5d78688 JH |
202 | static int |
203 | tls_client_stapling_cb(SSL *s, void *arg) | |
204 | { | |
205 | const unsigned char *p; | |
206 | int len; | |
207 | OCSP_RESPONSE *rsp; | |
208 | OCSP_BASICRESP *bs; | |
209 | char *CAfile = NULL; | |
210 | X509_STORE *store = NULL; | |
211 | int ret = 1; | |
212 | ||
213 | len = SSL_get_tlsext_status_ocsp_resp(s, &p); | |
214 | /*BIO_printf(arg, "OCSP response: ");*/ | |
215 | if (!p) | |
216 | { | |
217 | BIO_printf(arg, "no response received\n"); | |
218 | return 1; | |
219 | } | |
220 | if(!(rsp = d2i_OCSP_RESPONSE(NULL, &p, len))) | |
221 | { | |
222 | BIO_printf(arg, "response parse error\n"); | |
223 | BIO_dump_indent(arg, (char *)p, len, 4); | |
224 | return 0; | |
225 | } | |
226 | if(!(bs = OCSP_response_get1_basic(rsp))) | |
227 | { | |
228 | BIO_printf(arg, "error parsing response\n"); | |
229 | return 0; | |
230 | } | |
231 | ||
232 | CAfile = ocsp_stapling; | |
233 | if(!(store = setup_verify(arg, CAfile, NULL))) | |
234 | { | |
235 | BIO_printf(arg, "error in cert setup\n"); | |
236 | return 0; | |
237 | } | |
238 | ||
239 | /* No file of alternate certs, no options */ | |
240 | if(OCSP_basic_verify(bs, NULL, store, 0) <= 0) | |
241 | { | |
242 | BIO_printf(arg, "Response Verify Failure\n"); | |
243 | ERR_print_errors(arg); | |
244 | ret = 0; | |
245 | } | |
246 | else | |
247 | BIO_printf(arg, "Response verify OK\n"); | |
248 | ||
249 | X509_STORE_free(store); | |
250 | return ret; | |
251 | } | |
6d68e1c7 | 252 | #endif |
f5d78688 JH |
253 | |
254 | ||
c55a77db PH |
255 | /************************************************* |
256 | * Start an OpenSSL TLS session * | |
257 | *************************************************/ | |
258 | ||
2b4a568d JH |
259 | int |
260 | tls_start(int sock, SSL **ssl, SSL_CTX *ctx) | |
c55a77db PH |
261 | { |
262 | int rc; | |
57cde6e4 | 263 | static const unsigned char *sid_ctx = US"exim"; |
c55a77db PH |
264 | |
265 | RAND_load_file("client.c", -1); /* Not *very* random! */ | |
266 | ||
267 | *ssl = SSL_new (ctx); | |
57cde6e4 | 268 | SSL_set_session_id_context(*ssl, sid_ctx, strlen(CS sid_ctx)); |
c55a77db PH |
269 | SSL_set_fd (*ssl, sock); |
270 | SSL_set_connect_state(*ssl); | |
271 | ||
6d68e1c7 | 272 | #ifndef DISABLE_OCSP |
f5d78688 JH |
273 | if (ocsp_stapling) |
274 | { | |
275 | SSL_CTX_set_tlsext_status_cb(ctx, tls_client_stapling_cb); | |
276 | SSL_CTX_set_tlsext_status_arg(ctx, BIO_new_fp(stdout, BIO_NOCLOSE)); | |
277 | SSL_set_tlsext_status_type(*ssl, TLSEXT_STATUSTYPE_ocsp); | |
278 | } | |
6d68e1c7 | 279 | #endif |
f5d78688 | 280 | |
c55a77db PH |
281 | signal(SIGALRM, sigalrm_handler_flag); |
282 | sigalrm_seen = 0; | |
283 | alarm(5); | |
284 | rc = SSL_connect (*ssl); | |
285 | alarm(0); | |
286 | ||
287 | if (sigalrm_seen) | |
288 | { | |
289 | printf("SSL_connect timed out\n"); | |
290 | return 0; | |
291 | } | |
292 | ||
293 | if (rc <= 0) | |
294 | { | |
295 | ERR_print_errors_fp(stdout); | |
296 | return 0; | |
297 | } | |
298 | ||
299 | printf("SSL connection using %s\n", SSL_get_cipher (*ssl)); | |
300 | return 1; | |
301 | } | |
302 | ||
303 | ||
304 | /************************************************* | |
305 | * SSL Information callback * | |
306 | *************************************************/ | |
307 | ||
308 | static void | |
309 | info_callback(SSL *s, int where, int ret) | |
310 | { | |
311 | where = where; | |
312 | ret = ret; | |
313 | printf("SSL info: %s\n", SSL_state_string_long(s)); | |
314 | } | |
315 | #endif | |
316 | ||
317 | ||
318 | /****************************************************************************/ | |
319 | /****************************************************************************/ | |
320 | ||
321 | ||
322 | #ifdef HAVE_GNUTLS | |
323 | /************************************************* | |
324 | * Handle GnuTLS error * | |
325 | *************************************************/ | |
326 | ||
327 | /* Called from lots of places when errors occur before actually starting to do | |
328 | the TLS handshake, that is, while the session is still in clear. | |
329 | ||
330 | Argument: | |
331 | prefix prefix text | |
332 | err a GnuTLS error number, or 0 if local error | |
333 | ||
334 | Returns: doesn't - it dies | |
335 | */ | |
336 | ||
337 | static void | |
338 | gnutls_error(uschar *prefix, int err) | |
339 | { | |
bb727765 | 340 | fprintf(stderr, "GnuTLS connection error: %s:", prefix); |
c55a77db PH |
341 | if (err != 0) fprintf(stderr, " %s", gnutls_strerror(err)); |
342 | fprintf(stderr, "\n"); | |
9ff403f8 | 343 | exit(98); |
c55a77db PH |
344 | } |
345 | ||
346 | ||
347 | ||
348 | /************************************************* | |
bb727765 | 349 | * Setup up DH parameters * |
c55a77db PH |
350 | *************************************************/ |
351 | ||
352 | /* For the test suite, the parameters should always be available in the spool | |
353 | directory. */ | |
354 | ||
355 | static void | |
bb727765 | 356 | init_dh(void) |
c55a77db PH |
357 | { |
358 | int fd; | |
359 | int ret; | |
fc4fcc34 | 360 | gnutls_datum_t m; |
c55a77db PH |
361 | uschar filename[200]; |
362 | struct stat statbuf; | |
363 | ||
364 | /* Initialize the data structures for holding the parameters */ | |
365 | ||
c55a77db PH |
366 | ret = gnutls_dh_params_init(&dh_params); |
367 | if (ret < 0) gnutls_error(US"init dh_params", ret); | |
368 | ||
369 | /* Open the cache file for reading and if successful, read it and set up the | |
bb727765 | 370 | parameters. */ |
c55a77db PH |
371 | |
372 | fd = open("aux-fixed/gnutls-params", O_RDONLY, 0); | |
373 | if (fd < 0) | |
374 | { | |
375 | fprintf(stderr, "Failed to open spool/gnutls-params: %s\n", strerror(errno)); | |
9ff403f8 | 376 | exit(97); |
c55a77db PH |
377 | } |
378 | ||
379 | if (fstat(fd, &statbuf) < 0) | |
380 | { | |
381 | (void)close(fd); | |
382 | return gnutls_error(US"TLS cache stat failed", 0); | |
383 | } | |
384 | ||
385 | m.size = statbuf.st_size; | |
386 | m.data = malloc(m.size); | |
387 | if (m.data == NULL) | |
388 | return gnutls_error(US"memory allocation failed", 0); | |
389 | if (read(fd, m.data, m.size) != m.size) | |
390 | return gnutls_error(US"TLS cache read failed", 0); | |
391 | (void)close(fd); | |
392 | ||
c55a77db PH |
393 | ret = gnutls_dh_params_import_pkcs3(dh_params, &m, GNUTLS_X509_FMT_PEM); |
394 | if (ret < 0) return gnutls_error(US"DH params import", ret); | |
395 | free(m.data); | |
396 | } | |
397 | ||
398 | ||
399 | ||
400 | ||
401 | /************************************************* | |
402 | * Initialize for GnuTLS * | |
403 | *************************************************/ | |
404 | ||
405 | /* | |
406 | Arguments: | |
407 | certificate certificate file | |
408 | privatekey private key file | |
409 | */ | |
410 | ||
411 | static void | |
412 | tls_init(uschar *certificate, uschar *privatekey) | |
413 | { | |
414 | int rc; | |
415 | ||
416 | rc = gnutls_global_init(); | |
417 | if (rc < 0) gnutls_error(US"gnutls_global_init", rc); | |
418 | ||
bb727765 | 419 | /* Read D-H parameters from the cache file. */ |
c55a77db | 420 | |
bb727765 | 421 | init_dh(); |
c55a77db PH |
422 | |
423 | /* Create the credentials structure */ | |
424 | ||
425 | rc = gnutls_certificate_allocate_credentials(&x509_cred); | |
426 | if (rc < 0) gnutls_error(US"certificate_allocate_credentials", rc); | |
427 | ||
428 | /* Set the certificate and private keys */ | |
429 | ||
430 | if (certificate != NULL) | |
431 | { | |
432 | rc = gnutls_certificate_set_x509_key_file(x509_cred, CS certificate, | |
433 | CS privatekey, GNUTLS_X509_FMT_PEM); | |
434 | if (rc < 0) gnutls_error("gnutls_certificate", rc); | |
435 | } | |
436 | ||
437 | /* Associate the parameters with the x509 credentials structure. */ | |
438 | ||
439 | gnutls_certificate_set_dh_params(x509_cred, dh_params); | |
2b4a568d JH |
440 | |
441 | /* set the CA info for server-cert verify */ | |
442 | if (ocsp_stapling) | |
443 | gnutls_certificate_set_x509_trust_file(x509_cred, ocsp_stapling, | |
444 | GNUTLS_X509_FMT_PEM); | |
c55a77db PH |
445 | } |
446 | ||
447 | ||
448 | ||
449 | /************************************************* | |
450 | * Initialize a single GNUTLS session * | |
451 | *************************************************/ | |
452 | ||
fc4fcc34 | 453 | static gnutls_session_t |
c55a77db PH |
454 | tls_session_init(void) |
455 | { | |
fc4fcc34 | 456 | gnutls_session_t session; |
c55a77db | 457 | |
0886a95e | 458 | gnutls_init(&session, GNUTLS_CLIENT | GNUTLS_NO_EXTENSIONS); |
c55a77db | 459 | |
fc4fcc34 | 460 | #if GNUTLS_VERSION_NUMBER < 0x030400 |
c55a77db PH |
461 | gnutls_cipher_set_priority(session, default_cipher_priority); |
462 | gnutls_compression_set_priority(session, comp_priority); | |
463 | gnutls_kx_set_priority(session, kx_priority); | |
464 | gnutls_protocol_set_priority(session, protocol_priority); | |
465 | gnutls_mac_set_priority(session, mac_priority); | |
466 | ||
467 | gnutls_cred_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); | |
fc4fcc34 JH |
468 | #else |
469 | gnutls_set_default_priority(session); | |
470 | gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); | |
471 | #endif | |
c55a77db PH |
472 | |
473 | gnutls_dh_set_prime_bits(session, DH_BITS); | |
474 | gnutls_db_set_cache_expiration(session, ssl_session_timeout); | |
475 | ||
476 | return session; | |
477 | } | |
478 | #endif | |
479 | ||
480 | ||
481 | /****************************************************************************/ | |
482 | /****************************************************************************/ | |
483 | ||
484 | ||
485 | ||
486 | ||
487 | /************************************************* | |
488 | * Main Program * | |
489 | *************************************************/ | |
490 | ||
4fe99a6c | 491 | const char * const HELP_MESSAGE = "\n\ |
972e83f5 HSHR |
492 | Usage: client\n" |
493 | #ifdef HAVE_TLS | |
494 | "\ | |
495 | [-tls-on-connect]\n\ | |
496 | [-ocsp]\n" | |
497 | #endif | |
498 | "\ | |
499 | [-tn] n seconds timeout\n\ | |
4fe99a6c PP |
500 | <IP address>\n\ |
501 | <port>\n\ | |
502 | [<outgoing interface>]\n\ | |
503 | [<cert file>]\n\ | |
504 | [<key file>]\n\ | |
505 | \n"; | |
c55a77db PH |
506 | |
507 | int main(int argc, char **argv) | |
508 | { | |
509 | struct sockaddr *s_ptr; | |
510 | struct sockaddr_in s_in4; | |
511 | char *interface = NULL; | |
512 | char *address = NULL; | |
513 | char *certfile = NULL; | |
514 | char *keyfile = NULL; | |
1ec3f27d | 515 | char *end = NULL; |
c55a77db PH |
516 | int argi = 1; |
517 | int host_af, port, s_len, rc, sock, save_errno; | |
d528a389 | 518 | int timeout = 5; |
c55a77db PH |
519 | int tls_active = 0; |
520 | int sent_starttls = 0; | |
521 | int tls_on_connect = 0; | |
1ec3f27d | 522 | long tmplong; |
c55a77db PH |
523 | |
524 | #if HAVE_IPV6 | |
525 | struct sockaddr_in6 s_in6; | |
526 | #endif | |
527 | ||
528 | #ifdef HAVE_OPENSSL | |
529 | SSL_CTX* ctx; | |
530 | SSL* ssl; | |
531 | #endif | |
532 | ||
533 | unsigned char outbuffer[10240]; | |
534 | unsigned char inbuffer[10240]; | |
535 | unsigned char *inptr = inbuffer; | |
536 | ||
537 | *inptr = 0; /* Buffer empty */ | |
538 | ||
539 | /* Options */ | |
540 | ||
541 | while (argc >= argi + 1 && argv[argi][0] == '-') | |
542 | { | |
4fe99a6c PP |
543 | if (strcmp(argv[argi], "-help") == 0 || |
544 | strcmp(argv[argi], "--help") == 0 || | |
545 | strcmp(argv[argi], "-h") == 0) | |
546 | { | |
dd4c8678 | 547 | puts(HELP_MESSAGE); |
4fe99a6c PP |
548 | exit(0); |
549 | } | |
c55a77db PH |
550 | if (strcmp(argv[argi], "-tls-on-connect") == 0) |
551 | { | |
552 | tls_on_connect = 1; | |
553 | argi++; | |
554 | } | |
2b4a568d | 555 | #ifdef HAVE_TLS |
f5d78688 JH |
556 | else if (strcmp(argv[argi], "-ocsp") == 0) |
557 | { | |
558 | if (argc < ++argi + 1) | |
559 | { | |
560 | fprintf(stderr, "Missing required certificate file for ocsp option\n"); | |
9ff403f8 | 561 | exit(96); |
f5d78688 JH |
562 | } |
563 | ocsp_stapling = argv[argi++]; | |
564 | } | |
2b4a568d | 565 | |
f5d78688 | 566 | #endif |
c55a77db PH |
567 | else if (argv[argi][1] == 't' && isdigit(argv[argi][2])) |
568 | { | |
1ec3f27d PP |
569 | tmplong = strtol(argv[argi]+2, &end, 10); |
570 | if (end == argv[argi]+2 || *end) | |
571 | { | |
572 | fprintf(stderr, "Failed to parse seconds from option <%s>\n", | |
573 | argv[argi]); | |
9ff403f8 | 574 | exit(95); |
1ec3f27d PP |
575 | } |
576 | if (tmplong > 10000L) | |
577 | { | |
dd4c8678 | 578 | fprintf(stderr, "Unreasonably long wait of %ld seconds requested\n", |
1ec3f27d | 579 | tmplong); |
9ff403f8 | 580 | exit(94); |
1ec3f27d PP |
581 | } |
582 | if (tmplong < 0L) | |
583 | { | |
dd4c8678 | 584 | fprintf(stderr, "Timeout must not be negative (%ld)\n", tmplong); |
9ff403f8 | 585 | exit(93); |
1ec3f27d PP |
586 | } |
587 | timeout = (int) tmplong; | |
c55a77db PH |
588 | argi++; |
589 | } | |
590 | else | |
591 | { | |
1ec3f27d | 592 | fprintf(stderr, "Unrecognized option %s\n", argv[argi]); |
9ff403f8 | 593 | exit(92); |
c55a77db PH |
594 | } |
595 | } | |
596 | ||
597 | /* Mandatory 1st arg is IP address */ | |
598 | ||
599 | if (argc < argi+1) | |
600 | { | |
1ec3f27d | 601 | fprintf(stderr, "No IP address given\n"); |
9ff403f8 | 602 | exit(91); |
c55a77db PH |
603 | } |
604 | ||
605 | address = argv[argi++]; | |
606 | host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET; | |
607 | ||
608 | /* Mandatory 2nd arg is port */ | |
609 | ||
610 | if (argc < argi+1) | |
611 | { | |
1ec3f27d | 612 | fprintf(stderr, "No port number given\n"); |
9ff403f8 | 613 | exit(90); |
c55a77db PH |
614 | } |
615 | ||
616 | port = atoi(argv[argi++]); | |
617 | ||
618 | /* Optional next arg is interface */ | |
619 | ||
620 | if (argc > argi && | |
621 | (isdigit((unsigned char)argv[argi][0]) || argv[argi][0] == ':')) | |
622 | interface = argv[argi++]; | |
623 | ||
624 | /* Any more arguments are the name of a certificate file and key file */ | |
625 | ||
626 | if (argc > argi) certfile = argv[argi++]; | |
627 | if (argc > argi) keyfile = argv[argi++]; | |
628 | ||
629 | ||
630 | #if HAVE_IPV6 | |
631 | /* For an IPv6 address, use an IPv6 sockaddr structure. */ | |
632 | ||
633 | if (host_af == AF_INET6) | |
634 | { | |
635 | s_ptr = (struct sockaddr *)&s_in6; | |
636 | s_len = sizeof(s_in6); | |
637 | } | |
638 | else | |
639 | #endif | |
640 | ||
641 | /* For an IPv4 address, use an IPv4 sockaddr structure, | |
642 | even on an IPv6 system. */ | |
643 | ||
644 | { | |
645 | s_ptr = (struct sockaddr *)&s_in4; | |
646 | s_len = sizeof(s_in4); | |
647 | } | |
648 | ||
649 | printf("Connecting to %s port %d ... ", address, port); | |
650 | ||
651 | sock = socket(host_af, SOCK_STREAM, 0); | |
652 | if (sock < 0) | |
653 | { | |
654 | printf("socket creation failed: %s\n", strerror(errno)); | |
9ff403f8 | 655 | exit(89); |
c55a77db PH |
656 | } |
657 | ||
658 | /* Bind to a specific interface if requested. On an IPv6 system, this has | |
659 | to be of the same family as the address we are calling. On an IPv4 system the | |
660 | test is redundant, but it keeps the code tidier. */ | |
661 | ||
662 | if (interface != NULL) | |
663 | { | |
664 | int interface_af = (strchr(interface, ':') != NULL)? AF_INET6 : AF_INET; | |
665 | ||
666 | if (interface_af == host_af) | |
667 | { | |
668 | #if HAVE_IPV6 | |
669 | ||
670 | /* Set up for IPv6 binding */ | |
671 | ||
672 | if (host_af == AF_INET6) | |
673 | { | |
674 | memset(&s_in6, 0, sizeof(s_in6)); | |
675 | s_in6.sin6_family = AF_INET6; | |
676 | s_in6.sin6_port = 0; | |
677 | if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1) | |
678 | { | |
679 | printf("Unable to parse \"%s\"", interface); | |
9ff403f8 | 680 | exit(88); |
c55a77db PH |
681 | } |
682 | } | |
683 | else | |
684 | #endif | |
685 | ||
686 | /* Set up for IPv4 binding */ | |
687 | ||
688 | { | |
689 | memset(&s_in4, 0, sizeof(s_in4)); | |
690 | s_in4.sin_family = AF_INET; | |
691 | s_in4.sin_port = 0; | |
692 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(interface); | |
693 | } | |
694 | ||
695 | /* Bind */ | |
696 | ||
697 | if (bind(sock, s_ptr, s_len) < 0) | |
698 | { | |
699 | printf("Unable to bind outgoing SMTP call to %s: %s", | |
700 | interface, strerror(errno)); | |
9ff403f8 | 701 | exit(87); |
c55a77db PH |
702 | } |
703 | } | |
704 | } | |
705 | ||
706 | /* Set up a remote IPv6 address */ | |
707 | ||
708 | #if HAVE_IPV6 | |
709 | if (host_af == AF_INET6) | |
710 | { | |
711 | memset(&s_in6, 0, sizeof(s_in6)); | |
712 | s_in6.sin6_family = AF_INET6; | |
713 | s_in6.sin6_port = htons(port); | |
714 | if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1) | |
715 | { | |
716 | printf("Unable to parse \"%s\"", address); | |
9ff403f8 | 717 | exit(86); |
c55a77db PH |
718 | } |
719 | } | |
720 | else | |
721 | #endif | |
722 | ||
723 | /* Set up a remote IPv4 address */ | |
724 | ||
725 | { | |
726 | memset(&s_in4, 0, sizeof(s_in4)); | |
727 | s_in4.sin_family = AF_INET; | |
728 | s_in4.sin_port = htons(port); | |
729 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(address); | |
730 | } | |
731 | ||
732 | /* SIGALRM handler crashes out */ | |
733 | ||
734 | signal(SIGALRM, sigalrm_handler_crash); | |
735 | alarm(timeout); | |
736 | rc = connect(sock, s_ptr, s_len); | |
737 | save_errno = errno; | |
738 | alarm(0); | |
739 | ||
740 | /* A failure whose error code is "Interrupted system call" is in fact | |
741 | an externally applied timeout if the signal handler has been run. */ | |
742 | ||
743 | if (rc < 0) | |
744 | { | |
745 | close(sock); | |
41fdef91 | 746 | printf("connect failed: %s\n", strerror(save_errno)); |
9ff403f8 | 747 | exit(85); |
c55a77db PH |
748 | } |
749 | ||
750 | printf("connected\n"); | |
751 | ||
752 | ||
753 | /* --------------- Set up for OpenSSL --------------- */ | |
754 | ||
755 | #ifdef HAVE_OPENSSL | |
756 | SSL_library_init(); | |
757 | SSL_load_error_strings(); | |
758 | ||
759 | ctx = SSL_CTX_new(SSLv23_method()); | |
760 | if (ctx == NULL) | |
761 | { | |
762 | printf ("SSL_CTX_new failed\n"); | |
9ff403f8 | 763 | exit(84); |
c55a77db PH |
764 | } |
765 | ||
766 | if (certfile != NULL) | |
767 | { | |
768 | if (!SSL_CTX_use_certificate_file(ctx, certfile, SSL_FILETYPE_PEM)) | |
769 | { | |
770 | printf("SSL_CTX_use_certificate_file failed\n"); | |
9ff403f8 | 771 | exit(83); |
c55a77db PH |
772 | } |
773 | printf("Certificate file = %s\n", certfile); | |
774 | } | |
775 | ||
776 | if (keyfile != NULL) | |
777 | { | |
778 | if (!SSL_CTX_use_PrivateKey_file(ctx, keyfile, SSL_FILETYPE_PEM)) | |
779 | { | |
780 | printf("SSL_CTX_use_PrivateKey_file failed\n"); | |
9ff403f8 | 781 | exit(82); |
c55a77db PH |
782 | } |
783 | printf("Key file = %s\n", keyfile); | |
784 | } | |
785 | ||
786 | SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_BOTH); | |
787 | SSL_CTX_set_timeout(ctx, 200); | |
788 | SSL_CTX_set_info_callback(ctx, (void (*)())info_callback); | |
789 | #endif | |
790 | ||
791 | ||
792 | /* --------------- Set up for GnuTLS --------------- */ | |
793 | ||
794 | #ifdef HAVE_GNUTLS | |
795 | if (certfile != NULL) printf("Certificate file = %s\n", certfile); | |
796 | if (keyfile != NULL) printf("Key file = %s\n", keyfile); | |
797 | tls_init(certfile, keyfile); | |
798 | tls_session = tls_session_init(); | |
348051ad | 799 | #ifdef HAVE_OCSP |
2b4a568d JH |
800 | if (ocsp_stapling) |
801 | gnutls_ocsp_status_request_enable_client(tls_session, NULL, 0, NULL); | |
348051ad | 802 | #endif |
fc4fcc34 | 803 | gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr_t)(intptr_t)sock); |
c55a77db PH |
804 | |
805 | /* When the server asks for a certificate and the client does not have one, | |
806 | there is a SIGPIPE error in the gnutls_handshake() function for some reason | |
807 | that is not understood. As luck would have it, this has never hit Exim itself | |
808 | because it ignores SIGPIPE errors. Doing the same here allows it all to work as | |
809 | one wants. */ | |
810 | ||
811 | signal(SIGPIPE, SIG_IGN); | |
812 | #endif | |
813 | ||
814 | /* ---------------------------------------------- */ | |
815 | ||
816 | ||
817 | /* Start TLS session if configured to do so without STARTTLS */ | |
818 | ||
819 | #ifdef HAVE_TLS | |
820 | if (tls_on_connect) | |
821 | { | |
822 | printf("Attempting to start TLS\n"); | |
823 | ||
fc4fcc34 | 824 | #ifdef HAVE_OPENSSL |
c55a77db | 825 | tls_active = tls_start(sock, &ssl, ctx); |
fc4fcc34 | 826 | #endif |
c55a77db | 827 | |
fc4fcc34 JH |
828 | #ifdef HAVE_GNUTLS |
829 | { | |
830 | int rc; | |
c55a77db PH |
831 | sigalrm_seen = FALSE; |
832 | alarm(timeout); | |
fc4fcc34 JH |
833 | do { |
834 | rc = gnutls_handshake(tls_session); | |
835 | } while (rc < 0 && gnutls_error_is_fatal(rc) == 0); | |
836 | tls_active = rc >= 0; | |
c55a77db | 837 | alarm(0); |
fc4fcc34 JH |
838 | |
839 | if (!tls_active) printf("%s\n", gnutls_strerror(rc)); | |
840 | } | |
841 | #endif | |
c55a77db PH |
842 | |
843 | if (!tls_active) | |
844 | printf("Failed to start TLS\n"); | |
fc4fcc34 | 845 | #if defined(HAVE_GNUTLS) && defined(HAVE_OCSP) |
2b4a568d JH |
846 | else if ( ocsp_stapling |
847 | && gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) | |
848 | printf("Failed to verify certificate status\n"); | |
fc4fcc34 | 849 | #endif |
c55a77db PH |
850 | else |
851 | printf("Succeeded in starting TLS\n"); | |
852 | } | |
853 | #endif | |
854 | ||
a719fce4 | 855 | while (fgets(CS outbuffer, sizeof(outbuffer), stdin) != NULL) |
c55a77db | 856 | { |
a719fce4 | 857 | int n = (int)strlen(CS outbuffer); |
8dbb958a JH |
858 | |
859 | /* Strip trailing newline */ | |
860 | if (outbuffer[n-1] == '\n') outbuffer[--n] = 0; | |
c55a77db PH |
861 | |
862 | /* Expect incoming */ | |
863 | ||
a719fce4 | 864 | if (strncmp(CS outbuffer, "??? ", 4) == 0) |
c55a77db PH |
865 | { |
866 | unsigned char *lineptr; | |
867 | printf("%s\n", outbuffer); | |
868 | ||
869 | if (*inptr == 0) /* Refill input buffer */ | |
870 | { | |
871 | if (tls_active) | |
872 | { | |
873 | #ifdef HAVE_OPENSSL | |
874 | rc = SSL_read (ssl, inbuffer, sizeof(inbuffer) - 1); | |
875 | #endif | |
876 | #ifdef HAVE_GNUTLS | |
877 | rc = gnutls_record_recv(tls_session, CS inbuffer, sizeof(inbuffer) - 1); | |
878 | #endif | |
879 | } | |
880 | else | |
881 | { | |
882 | alarm(timeout); | |
883 | rc = read(sock, inbuffer, sizeof(inbuffer)); | |
884 | alarm(0); | |
885 | } | |
886 | ||
887 | if (rc < 0) | |
888 | { | |
889 | printf("Read error %s\n", strerror(errno)); | |
9ff403f8 | 890 | exit(81) ; |
c55a77db PH |
891 | } |
892 | else if (rc == 0) | |
893 | { | |
894 | printf("Unexpected EOF read\n"); | |
895 | close(sock); | |
9ff403f8 | 896 | exit(80); |
c55a77db PH |
897 | } |
898 | else | |
899 | { | |
900 | inbuffer[rc] = 0; | |
901 | inptr = inbuffer; | |
902 | } | |
903 | } | |
904 | ||
905 | lineptr = inptr; | |
906 | while (*inptr != 0 && *inptr != '\r' && *inptr != '\n') inptr++; | |
907 | if (*inptr != 0) | |
908 | { | |
909 | *inptr++ = 0; | |
910 | if (*inptr == '\n') inptr++; | |
911 | } | |
912 | ||
913 | printf("<<< %s\n", lineptr); | |
a719fce4 | 914 | if (strncmp(CS lineptr, CS outbuffer + 4, (int)strlen(CS outbuffer) - 4) != 0) |
c55a77db PH |
915 | { |
916 | printf("\n******** Input mismatch ********\n"); | |
9ff403f8 | 917 | exit(79); |
c55a77db PH |
918 | } |
919 | ||
920 | #ifdef HAVE_TLS | |
921 | if (sent_starttls) | |
922 | { | |
923 | if (lineptr[0] == '2') | |
924 | { | |
2b4a568d JH |
925 | int rc; |
926 | unsigned int verify; | |
927 | ||
c55a77db PH |
928 | printf("Attempting to start TLS\n"); |
929 | fflush(stdout); | |
930 | ||
931 | #ifdef HAVE_OPENSSL | |
932 | tls_active = tls_start(sock, &ssl, ctx); | |
933 | #endif | |
934 | ||
935 | #ifdef HAVE_GNUTLS | |
fc4fcc34 JH |
936 | { |
937 | int rc; | |
938 | sigalrm_seen = FALSE; | |
939 | alarm(timeout); | |
940 | do { | |
941 | rc = gnutls_handshake(tls_session); | |
942 | } while (rc < 0 && gnutls_error_is_fatal(rc) == 0); | |
943 | tls_active = rc >= 0; | |
944 | alarm(0); | |
945 | ||
946 | if (!tls_active) printf("%s\n", gnutls_strerror(rc)); | |
947 | } | |
c55a77db PH |
948 | #endif |
949 | ||
950 | if (!tls_active) | |
951 | { | |
952 | printf("Failed to start TLS\n"); | |
953 | fflush(stdout); | |
954 | } | |
2b4a568d JH |
955 | #ifdef HAVE_GNUTLS |
956 | else if (ocsp_stapling) | |
957 | { | |
958 | if ((rc= gnutls_certificate_verify_peers2(tls_session, &verify)) < 0) | |
959 | { | |
960 | printf("Failed to verify certificate: %s\n", gnutls_strerror(rc)); | |
961 | fflush(stdout); | |
962 | } | |
963 | else if (verify & (GNUTLS_CERT_INVALID|GNUTLS_CERT_REVOKED)) | |
964 | { | |
965 | printf("Bad certificate\n"); | |
966 | fflush(stdout); | |
967 | } | |
348051ad | 968 | #ifdef HAVE_OCSP |
2b4a568d JH |
969 | else if (gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) |
970 | { | |
971 | printf("Failed to verify certificate status\n"); | |
972 | { | |
973 | gnutls_datum_t stapling; | |
974 | gnutls_ocsp_resp_t resp; | |
975 | gnutls_datum_t printed; | |
976 | if ( (rc= gnutls_ocsp_status_request_get(tls_session, &stapling)) == 0 | |
977 | && (rc= gnutls_ocsp_resp_init(&resp)) == 0 | |
978 | && (rc= gnutls_ocsp_resp_import(resp, &stapling)) == 0 | |
979 | && (rc= gnutls_ocsp_resp_print(resp, GNUTLS_OCSP_PRINT_FULL, &printed)) == 0 | |
980 | ) | |
981 | { | |
982 | fprintf(stderr, "%.4096s", printed.data); | |
983 | gnutls_free(printed.data); | |
984 | } | |
985 | else | |
986 | (void) fprintf(stderr,"ocsp decode: %s", gnutls_strerror(rc)); | |
987 | } | |
988 | fflush(stdout); | |
989 | } | |
348051ad | 990 | #endif |
2b4a568d JH |
991 | } |
992 | #endif | |
c55a77db PH |
993 | else |
994 | printf("Succeeded in starting TLS\n"); | |
995 | } | |
996 | else printf("Abandoning TLS start attempt\n"); | |
997 | } | |
998 | sent_starttls = 0; | |
999 | #endif | |
1000 | } | |
1001 | ||
1002 | /* Wait for a bit before proceeding */ | |
1003 | ||
a719fce4 | 1004 | else if (strncmp(CS outbuffer, "+++ ", 4) == 0) |
c55a77db PH |
1005 | { |
1006 | printf("%s\n", outbuffer); | |
a719fce4 | 1007 | sleep(atoi(CS outbuffer + 4)); |
c55a77db PH |
1008 | } |
1009 | ||
1010 | /* Send outgoing, but barf if unconsumed incoming */ | |
1011 | ||
1012 | else | |
1013 | { | |
1014 | unsigned char *escape; | |
1015 | ||
1016 | if (*inptr != 0) | |
1017 | { | |
1018 | printf("Unconsumed input: %s", inptr); | |
1019 | printf(" About to send: %s\n", outbuffer); | |
9ff403f8 | 1020 | exit(78); |
c55a77db PH |
1021 | } |
1022 | ||
1023 | #ifdef HAVE_TLS | |
1024 | ||
1025 | /* Shutdown TLS */ | |
1026 | ||
e265af1f JH |
1027 | if (strcmp(CS outbuffer, "stoptls") == 0 || |
1028 | strcmp(CS outbuffer, "STOPTLS") == 0) | |
c55a77db PH |
1029 | { |
1030 | if (!tls_active) | |
1031 | { | |
1032 | printf("STOPTLS read when TLS not active\n"); | |
9ff403f8 | 1033 | exit(77); |
c55a77db PH |
1034 | } |
1035 | printf("Shutting down TLS encryption\n"); | |
1036 | ||
1037 | #ifdef HAVE_OPENSSL | |
1038 | SSL_shutdown(ssl); | |
1039 | SSL_free(ssl); | |
1040 | #endif | |
1041 | ||
1042 | #ifdef HAVE_GNUTLS | |
1043 | gnutls_bye(tls_session, GNUTLS_SHUT_WR); | |
1044 | gnutls_deinit(tls_session); | |
1045 | tls_session = NULL; | |
1046 | gnutls_global_deinit(); | |
1047 | #endif | |
1048 | ||
1049 | tls_active = 0; | |
1050 | continue; | |
1051 | } | |
1052 | ||
1053 | /* Remember that we sent STARTTLS */ | |
1054 | ||
e265af1f JH |
1055 | sent_starttls = (strcmp(CS outbuffer, "starttls") == 0 || |
1056 | strcmp(CS outbuffer, "STARTTLS") == 0); | |
c55a77db PH |
1057 | |
1058 | /* Fudge: if the command is "starttls_wait", we send the starttls bit, | |
1059 | but we haven't set the flag, so that there is no negotiation. This is for | |
1060 | testing the server's timeout. */ | |
1061 | ||
e265af1f | 1062 | if (strcmp(CS outbuffer, "starttls_wait") == 0) |
c55a77db PH |
1063 | { |
1064 | outbuffer[8] = 0; | |
1065 | n = 8; | |
1066 | } | |
1067 | #endif | |
1068 | ||
1069 | printf(">>> %s\n", outbuffer); | |
a719fce4 | 1070 | strcpy(CS outbuffer + n, "\r\n"); |
c55a77db PH |
1071 | |
1072 | /* Turn "\n" and "\r" into the relevant characters. This is a hack. */ | |
1073 | ||
a719fce4 | 1074 | while ((escape = US strstr(CS outbuffer, "\\r")) != NULL) |
c55a77db PH |
1075 | { |
1076 | *escape = '\r'; | |
1077 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
1078 | n--; | |
1079 | } | |
1080 | ||
e265af1f | 1081 | while ((escape = US strstr(CS outbuffer, "\\n")) != NULL) |
c55a77db PH |
1082 | { |
1083 | *escape = '\n'; | |
1084 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
1085 | n--; | |
1086 | } | |
1087 | ||
1088 | /* OK, do it */ | |
1089 | ||
1090 | alarm(timeout); | |
1091 | if (tls_active) | |
1092 | { | |
1093 | #ifdef HAVE_OPENSSL | |
1094 | rc = SSL_write (ssl, outbuffer, n + 2); | |
1095 | #endif | |
1096 | #ifdef HAVE_GNUTLS | |
1097 | rc = gnutls_record_send(tls_session, CS outbuffer, n + 2); | |
1098 | if (rc < 0) | |
1099 | { | |
1100 | printf("GnuTLS write error: %s\n", gnutls_strerror(rc)); | |
9ff403f8 | 1101 | exit(76); |
c55a77db PH |
1102 | } |
1103 | #endif | |
1104 | } | |
1105 | else | |
1106 | { | |
1107 | rc = write(sock, outbuffer, n + 2); | |
1108 | } | |
1109 | alarm(0); | |
1110 | ||
1111 | if (rc < 0) | |
1112 | { | |
1113 | printf("Write error: %s\n", strerror(errno)); | |
9ff403f8 | 1114 | exit(75); |
c55a77db PH |
1115 | } |
1116 | } | |
1117 | } | |
1118 | ||
1119 | printf("End of script\n"); | |
1120 | close(sock); | |
1121 | ||
1122 | exit(0); | |
1123 | } | |
1124 | ||
1125 | /* End of client.c */ |