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 |
ee5b1e28 JH |
202 | static STACK_OF(X509) * |
203 | cert_stack_from_store(X509_STORE * store) | |
204 | { | |
205 | STACK_OF(X509_OBJECT) * roots= store->objs; | |
206 | STACK_OF(X509) * sk = sk_X509_new_null(); | |
207 | int i; | |
208 | ||
209 | for(i = sk_X509_OBJECT_num(roots) - 1; i >= 0; i--) | |
210 | { | |
211 | X509_OBJECT * tmp_obj= sk_X509_OBJECT_value(roots, i); | |
212 | if(tmp_obj->type == X509_LU_X509) | |
213 | { | |
214 | X509 * x = tmp_obj->data.x509; | |
215 | sk_X509_push(sk, x); | |
216 | } | |
217 | } | |
218 | return sk; | |
219 | } | |
220 | ||
221 | static void | |
222 | cert_stack_free(STACK_OF(X509) * sk) | |
223 | { | |
224 | while (sk_X509_num(sk) > 0) (void) sk_X509_pop(sk); | |
225 | sk_X509_free(sk); | |
226 | } | |
227 | ||
228 | ||
f5d78688 JH |
229 | static int |
230 | tls_client_stapling_cb(SSL *s, void *arg) | |
231 | { | |
232 | const unsigned char *p; | |
233 | int len; | |
234 | OCSP_RESPONSE *rsp; | |
235 | OCSP_BASICRESP *bs; | |
236 | char *CAfile = NULL; | |
237 | X509_STORE *store = NULL; | |
ee5b1e28 | 238 | STACK_OF(X509) * sk; |
f5d78688 JH |
239 | int ret = 1; |
240 | ||
241 | len = SSL_get_tlsext_status_ocsp_resp(s, &p); | |
242 | /*BIO_printf(arg, "OCSP response: ");*/ | |
243 | if (!p) | |
244 | { | |
245 | BIO_printf(arg, "no response received\n"); | |
246 | return 1; | |
247 | } | |
248 | if(!(rsp = d2i_OCSP_RESPONSE(NULL, &p, len))) | |
249 | { | |
250 | BIO_printf(arg, "response parse error\n"); | |
251 | BIO_dump_indent(arg, (char *)p, len, 4); | |
252 | return 0; | |
253 | } | |
254 | if(!(bs = OCSP_response_get1_basic(rsp))) | |
255 | { | |
256 | BIO_printf(arg, "error parsing response\n"); | |
257 | return 0; | |
258 | } | |
259 | ||
ee5b1e28 | 260 | |
f5d78688 JH |
261 | CAfile = ocsp_stapling; |
262 | if(!(store = setup_verify(arg, CAfile, NULL))) | |
263 | { | |
264 | BIO_printf(arg, "error in cert setup\n"); | |
265 | return 0; | |
266 | } | |
267 | ||
ee5b1e28 JH |
268 | sk = cert_stack_from_store(store); |
269 | ||
270 | /* OCSP_basic_verify takes a "store" arg, but does not | |
271 | use it for the chain verification, which is all we do | |
272 | when OCSP_NOVERIFY is set. The content from the wire | |
273 | (in "bs") and a cert-stack "sk" are all that is used. */ | |
274 | ||
275 | if(OCSP_basic_verify(bs, sk, NULL, OCSP_NOVERIFY) <= 0) | |
f5d78688 JH |
276 | { |
277 | BIO_printf(arg, "Response Verify Failure\n"); | |
278 | ERR_print_errors(arg); | |
279 | ret = 0; | |
280 | } | |
281 | else | |
282 | BIO_printf(arg, "Response verify OK\n"); | |
283 | ||
ee5b1e28 | 284 | cert_stack_free(sk); |
f5d78688 JH |
285 | X509_STORE_free(store); |
286 | return ret; | |
287 | } | |
6d68e1c7 | 288 | #endif |
f5d78688 JH |
289 | |
290 | ||
c55a77db PH |
291 | /************************************************* |
292 | * Start an OpenSSL TLS session * | |
293 | *************************************************/ | |
294 | ||
2b4a568d JH |
295 | int |
296 | tls_start(int sock, SSL **ssl, SSL_CTX *ctx) | |
c55a77db PH |
297 | { |
298 | int rc; | |
57cde6e4 | 299 | static const unsigned char *sid_ctx = US"exim"; |
c55a77db PH |
300 | |
301 | RAND_load_file("client.c", -1); /* Not *very* random! */ | |
302 | ||
303 | *ssl = SSL_new (ctx); | |
57cde6e4 | 304 | SSL_set_session_id_context(*ssl, sid_ctx, strlen(CS sid_ctx)); |
c55a77db PH |
305 | SSL_set_fd (*ssl, sock); |
306 | SSL_set_connect_state(*ssl); | |
307 | ||
6d68e1c7 | 308 | #ifndef DISABLE_OCSP |
f5d78688 JH |
309 | if (ocsp_stapling) |
310 | { | |
311 | SSL_CTX_set_tlsext_status_cb(ctx, tls_client_stapling_cb); | |
312 | SSL_CTX_set_tlsext_status_arg(ctx, BIO_new_fp(stdout, BIO_NOCLOSE)); | |
313 | SSL_set_tlsext_status_type(*ssl, TLSEXT_STATUSTYPE_ocsp); | |
314 | } | |
6d68e1c7 | 315 | #endif |
f5d78688 | 316 | |
c55a77db PH |
317 | signal(SIGALRM, sigalrm_handler_flag); |
318 | sigalrm_seen = 0; | |
319 | alarm(5); | |
320 | rc = SSL_connect (*ssl); | |
321 | alarm(0); | |
322 | ||
323 | if (sigalrm_seen) | |
324 | { | |
325 | printf("SSL_connect timed out\n"); | |
326 | return 0; | |
327 | } | |
328 | ||
329 | if (rc <= 0) | |
330 | { | |
331 | ERR_print_errors_fp(stdout); | |
332 | return 0; | |
333 | } | |
334 | ||
335 | printf("SSL connection using %s\n", SSL_get_cipher (*ssl)); | |
336 | return 1; | |
337 | } | |
338 | ||
339 | ||
340 | /************************************************* | |
341 | * SSL Information callback * | |
342 | *************************************************/ | |
343 | ||
344 | static void | |
345 | info_callback(SSL *s, int where, int ret) | |
346 | { | |
347 | where = where; | |
348 | ret = ret; | |
349 | printf("SSL info: %s\n", SSL_state_string_long(s)); | |
350 | } | |
351 | #endif | |
352 | ||
353 | ||
354 | /****************************************************************************/ | |
355 | /****************************************************************************/ | |
356 | ||
357 | ||
358 | #ifdef HAVE_GNUTLS | |
359 | /************************************************* | |
360 | * Handle GnuTLS error * | |
361 | *************************************************/ | |
362 | ||
363 | /* Called from lots of places when errors occur before actually starting to do | |
364 | the TLS handshake, that is, while the session is still in clear. | |
365 | ||
366 | Argument: | |
367 | prefix prefix text | |
368 | err a GnuTLS error number, or 0 if local error | |
369 | ||
370 | Returns: doesn't - it dies | |
371 | */ | |
372 | ||
373 | static void | |
374 | gnutls_error(uschar *prefix, int err) | |
375 | { | |
bb727765 | 376 | fprintf(stderr, "GnuTLS connection error: %s:", prefix); |
c55a77db PH |
377 | if (err != 0) fprintf(stderr, " %s", gnutls_strerror(err)); |
378 | fprintf(stderr, "\n"); | |
9ff403f8 | 379 | exit(98); |
c55a77db PH |
380 | } |
381 | ||
382 | ||
383 | ||
384 | /************************************************* | |
bb727765 | 385 | * Setup up DH parameters * |
c55a77db PH |
386 | *************************************************/ |
387 | ||
388 | /* For the test suite, the parameters should always be available in the spool | |
389 | directory. */ | |
390 | ||
391 | static void | |
bb727765 | 392 | init_dh(void) |
c55a77db PH |
393 | { |
394 | int fd; | |
395 | int ret; | |
fc4fcc34 | 396 | gnutls_datum_t m; |
c55a77db PH |
397 | uschar filename[200]; |
398 | struct stat statbuf; | |
399 | ||
400 | /* Initialize the data structures for holding the parameters */ | |
401 | ||
c55a77db PH |
402 | ret = gnutls_dh_params_init(&dh_params); |
403 | if (ret < 0) gnutls_error(US"init dh_params", ret); | |
404 | ||
405 | /* Open the cache file for reading and if successful, read it and set up the | |
bb727765 | 406 | parameters. */ |
c55a77db PH |
407 | |
408 | fd = open("aux-fixed/gnutls-params", O_RDONLY, 0); | |
409 | if (fd < 0) | |
410 | { | |
411 | fprintf(stderr, "Failed to open spool/gnutls-params: %s\n", strerror(errno)); | |
9ff403f8 | 412 | exit(97); |
c55a77db PH |
413 | } |
414 | ||
415 | if (fstat(fd, &statbuf) < 0) | |
416 | { | |
417 | (void)close(fd); | |
418 | return gnutls_error(US"TLS cache stat failed", 0); | |
419 | } | |
420 | ||
421 | m.size = statbuf.st_size; | |
422 | m.data = malloc(m.size); | |
423 | if (m.data == NULL) | |
424 | return gnutls_error(US"memory allocation failed", 0); | |
425 | if (read(fd, m.data, m.size) != m.size) | |
426 | return gnutls_error(US"TLS cache read failed", 0); | |
427 | (void)close(fd); | |
428 | ||
c55a77db PH |
429 | ret = gnutls_dh_params_import_pkcs3(dh_params, &m, GNUTLS_X509_FMT_PEM); |
430 | if (ret < 0) return gnutls_error(US"DH params import", ret); | |
431 | free(m.data); | |
432 | } | |
433 | ||
434 | ||
435 | ||
436 | ||
437 | /************************************************* | |
438 | * Initialize for GnuTLS * | |
439 | *************************************************/ | |
440 | ||
441 | /* | |
442 | Arguments: | |
443 | certificate certificate file | |
444 | privatekey private key file | |
445 | */ | |
446 | ||
447 | static void | |
448 | tls_init(uschar *certificate, uschar *privatekey) | |
449 | { | |
450 | int rc; | |
451 | ||
452 | rc = gnutls_global_init(); | |
453 | if (rc < 0) gnutls_error(US"gnutls_global_init", rc); | |
454 | ||
bb727765 | 455 | /* Read D-H parameters from the cache file. */ |
c55a77db | 456 | |
bb727765 | 457 | init_dh(); |
c55a77db PH |
458 | |
459 | /* Create the credentials structure */ | |
460 | ||
461 | rc = gnutls_certificate_allocate_credentials(&x509_cred); | |
462 | if (rc < 0) gnutls_error(US"certificate_allocate_credentials", rc); | |
463 | ||
464 | /* Set the certificate and private keys */ | |
465 | ||
466 | if (certificate != NULL) | |
467 | { | |
468 | rc = gnutls_certificate_set_x509_key_file(x509_cred, CS certificate, | |
469 | CS privatekey, GNUTLS_X509_FMT_PEM); | |
470 | if (rc < 0) gnutls_error("gnutls_certificate", rc); | |
471 | } | |
472 | ||
473 | /* Associate the parameters with the x509 credentials structure. */ | |
474 | ||
475 | gnutls_certificate_set_dh_params(x509_cred, dh_params); | |
2b4a568d JH |
476 | |
477 | /* set the CA info for server-cert verify */ | |
478 | if (ocsp_stapling) | |
479 | gnutls_certificate_set_x509_trust_file(x509_cred, ocsp_stapling, | |
480 | GNUTLS_X509_FMT_PEM); | |
c55a77db PH |
481 | } |
482 | ||
483 | ||
484 | ||
485 | /************************************************* | |
486 | * Initialize a single GNUTLS session * | |
487 | *************************************************/ | |
488 | ||
fc4fcc34 | 489 | static gnutls_session_t |
c55a77db PH |
490 | tls_session_init(void) |
491 | { | |
fc4fcc34 | 492 | gnutls_session_t session; |
c55a77db | 493 | |
0886a95e | 494 | gnutls_init(&session, GNUTLS_CLIENT | GNUTLS_NO_EXTENSIONS); |
c55a77db | 495 | |
fc4fcc34 | 496 | #if GNUTLS_VERSION_NUMBER < 0x030400 |
c55a77db PH |
497 | gnutls_cipher_set_priority(session, default_cipher_priority); |
498 | gnutls_compression_set_priority(session, comp_priority); | |
499 | gnutls_kx_set_priority(session, kx_priority); | |
500 | gnutls_protocol_set_priority(session, protocol_priority); | |
501 | gnutls_mac_set_priority(session, mac_priority); | |
502 | ||
503 | gnutls_cred_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); | |
fc4fcc34 JH |
504 | #else |
505 | gnutls_set_default_priority(session); | |
506 | gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); | |
507 | #endif | |
c55a77db PH |
508 | |
509 | gnutls_dh_set_prime_bits(session, DH_BITS); | |
510 | gnutls_db_set_cache_expiration(session, ssl_session_timeout); | |
511 | ||
512 | return session; | |
513 | } | |
514 | #endif | |
515 | ||
516 | ||
517 | /****************************************************************************/ | |
518 | /****************************************************************************/ | |
519 | ||
520 | ||
521 | ||
522 | ||
523 | /************************************************* | |
524 | * Main Program * | |
525 | *************************************************/ | |
526 | ||
4fe99a6c | 527 | const char * const HELP_MESSAGE = "\n\ |
972e83f5 HSHR |
528 | Usage: client\n" |
529 | #ifdef HAVE_TLS | |
530 | "\ | |
531 | [-tls-on-connect]\n\ | |
532 | [-ocsp]\n" | |
533 | #endif | |
534 | "\ | |
535 | [-tn] n seconds timeout\n\ | |
4fe99a6c PP |
536 | <IP address>\n\ |
537 | <port>\n\ | |
538 | [<outgoing interface>]\n\ | |
539 | [<cert file>]\n\ | |
540 | [<key file>]\n\ | |
541 | \n"; | |
c55a77db PH |
542 | |
543 | int main(int argc, char **argv) | |
544 | { | |
545 | struct sockaddr *s_ptr; | |
546 | struct sockaddr_in s_in4; | |
547 | char *interface = NULL; | |
548 | char *address = NULL; | |
549 | char *certfile = NULL; | |
550 | char *keyfile = NULL; | |
1ec3f27d | 551 | char *end = NULL; |
c55a77db PH |
552 | int argi = 1; |
553 | int host_af, port, s_len, rc, sock, save_errno; | |
d528a389 | 554 | int timeout = 5; |
c55a77db PH |
555 | int tls_active = 0; |
556 | int sent_starttls = 0; | |
557 | int tls_on_connect = 0; | |
1ec3f27d | 558 | long tmplong; |
c55a77db PH |
559 | |
560 | #if HAVE_IPV6 | |
561 | struct sockaddr_in6 s_in6; | |
562 | #endif | |
563 | ||
564 | #ifdef HAVE_OPENSSL | |
565 | SSL_CTX* ctx; | |
566 | SSL* ssl; | |
567 | #endif | |
568 | ||
569 | unsigned char outbuffer[10240]; | |
570 | unsigned char inbuffer[10240]; | |
571 | unsigned char *inptr = inbuffer; | |
572 | ||
573 | *inptr = 0; /* Buffer empty */ | |
574 | ||
575 | /* Options */ | |
576 | ||
577 | while (argc >= argi + 1 && argv[argi][0] == '-') | |
578 | { | |
4fe99a6c PP |
579 | if (strcmp(argv[argi], "-help") == 0 || |
580 | strcmp(argv[argi], "--help") == 0 || | |
581 | strcmp(argv[argi], "-h") == 0) | |
582 | { | |
dd4c8678 | 583 | puts(HELP_MESSAGE); |
4fe99a6c PP |
584 | exit(0); |
585 | } | |
c55a77db PH |
586 | if (strcmp(argv[argi], "-tls-on-connect") == 0) |
587 | { | |
588 | tls_on_connect = 1; | |
589 | argi++; | |
590 | } | |
2b4a568d | 591 | #ifdef HAVE_TLS |
f5d78688 JH |
592 | else if (strcmp(argv[argi], "-ocsp") == 0) |
593 | { | |
594 | if (argc < ++argi + 1) | |
595 | { | |
596 | fprintf(stderr, "Missing required certificate file for ocsp option\n"); | |
9ff403f8 | 597 | exit(96); |
f5d78688 JH |
598 | } |
599 | ocsp_stapling = argv[argi++]; | |
600 | } | |
2b4a568d | 601 | |
f5d78688 | 602 | #endif |
c55a77db PH |
603 | else if (argv[argi][1] == 't' && isdigit(argv[argi][2])) |
604 | { | |
1ec3f27d PP |
605 | tmplong = strtol(argv[argi]+2, &end, 10); |
606 | if (end == argv[argi]+2 || *end) | |
607 | { | |
608 | fprintf(stderr, "Failed to parse seconds from option <%s>\n", | |
609 | argv[argi]); | |
9ff403f8 | 610 | exit(95); |
1ec3f27d PP |
611 | } |
612 | if (tmplong > 10000L) | |
613 | { | |
dd4c8678 | 614 | fprintf(stderr, "Unreasonably long wait of %ld seconds requested\n", |
1ec3f27d | 615 | tmplong); |
9ff403f8 | 616 | exit(94); |
1ec3f27d PP |
617 | } |
618 | if (tmplong < 0L) | |
619 | { | |
dd4c8678 | 620 | fprintf(stderr, "Timeout must not be negative (%ld)\n", tmplong); |
9ff403f8 | 621 | exit(93); |
1ec3f27d PP |
622 | } |
623 | timeout = (int) tmplong; | |
c55a77db PH |
624 | argi++; |
625 | } | |
626 | else | |
627 | { | |
1ec3f27d | 628 | fprintf(stderr, "Unrecognized option %s\n", argv[argi]); |
9ff403f8 | 629 | exit(92); |
c55a77db PH |
630 | } |
631 | } | |
632 | ||
633 | /* Mandatory 1st arg is IP address */ | |
634 | ||
635 | if (argc < argi+1) | |
636 | { | |
1ec3f27d | 637 | fprintf(stderr, "No IP address given\n"); |
9ff403f8 | 638 | exit(91); |
c55a77db PH |
639 | } |
640 | ||
641 | address = argv[argi++]; | |
642 | host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET; | |
643 | ||
644 | /* Mandatory 2nd arg is port */ | |
645 | ||
646 | if (argc < argi+1) | |
647 | { | |
1ec3f27d | 648 | fprintf(stderr, "No port number given\n"); |
9ff403f8 | 649 | exit(90); |
c55a77db PH |
650 | } |
651 | ||
652 | port = atoi(argv[argi++]); | |
653 | ||
654 | /* Optional next arg is interface */ | |
655 | ||
656 | if (argc > argi && | |
657 | (isdigit((unsigned char)argv[argi][0]) || argv[argi][0] == ':')) | |
658 | interface = argv[argi++]; | |
659 | ||
660 | /* Any more arguments are the name of a certificate file and key file */ | |
661 | ||
662 | if (argc > argi) certfile = argv[argi++]; | |
663 | if (argc > argi) keyfile = argv[argi++]; | |
664 | ||
665 | ||
666 | #if HAVE_IPV6 | |
667 | /* For an IPv6 address, use an IPv6 sockaddr structure. */ | |
668 | ||
669 | if (host_af == AF_INET6) | |
670 | { | |
671 | s_ptr = (struct sockaddr *)&s_in6; | |
672 | s_len = sizeof(s_in6); | |
673 | } | |
674 | else | |
675 | #endif | |
676 | ||
677 | /* For an IPv4 address, use an IPv4 sockaddr structure, | |
678 | even on an IPv6 system. */ | |
679 | ||
680 | { | |
681 | s_ptr = (struct sockaddr *)&s_in4; | |
682 | s_len = sizeof(s_in4); | |
683 | } | |
684 | ||
685 | printf("Connecting to %s port %d ... ", address, port); | |
686 | ||
687 | sock = socket(host_af, SOCK_STREAM, 0); | |
688 | if (sock < 0) | |
689 | { | |
690 | printf("socket creation failed: %s\n", strerror(errno)); | |
9ff403f8 | 691 | exit(89); |
c55a77db PH |
692 | } |
693 | ||
694 | /* Bind to a specific interface if requested. On an IPv6 system, this has | |
695 | to be of the same family as the address we are calling. On an IPv4 system the | |
696 | test is redundant, but it keeps the code tidier. */ | |
697 | ||
698 | if (interface != NULL) | |
699 | { | |
700 | int interface_af = (strchr(interface, ':') != NULL)? AF_INET6 : AF_INET; | |
701 | ||
702 | if (interface_af == host_af) | |
703 | { | |
704 | #if HAVE_IPV6 | |
705 | ||
706 | /* Set up for IPv6 binding */ | |
707 | ||
708 | if (host_af == AF_INET6) | |
709 | { | |
710 | memset(&s_in6, 0, sizeof(s_in6)); | |
711 | s_in6.sin6_family = AF_INET6; | |
712 | s_in6.sin6_port = 0; | |
713 | if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1) | |
714 | { | |
715 | printf("Unable to parse \"%s\"", interface); | |
9ff403f8 | 716 | exit(88); |
c55a77db PH |
717 | } |
718 | } | |
719 | else | |
720 | #endif | |
721 | ||
722 | /* Set up for IPv4 binding */ | |
723 | ||
724 | { | |
725 | memset(&s_in4, 0, sizeof(s_in4)); | |
726 | s_in4.sin_family = AF_INET; | |
727 | s_in4.sin_port = 0; | |
728 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(interface); | |
729 | } | |
730 | ||
731 | /* Bind */ | |
732 | ||
733 | if (bind(sock, s_ptr, s_len) < 0) | |
734 | { | |
735 | printf("Unable to bind outgoing SMTP call to %s: %s", | |
736 | interface, strerror(errno)); | |
9ff403f8 | 737 | exit(87); |
c55a77db PH |
738 | } |
739 | } | |
740 | } | |
741 | ||
742 | /* Set up a remote IPv6 address */ | |
743 | ||
744 | #if HAVE_IPV6 | |
745 | if (host_af == AF_INET6) | |
746 | { | |
747 | memset(&s_in6, 0, sizeof(s_in6)); | |
748 | s_in6.sin6_family = AF_INET6; | |
749 | s_in6.sin6_port = htons(port); | |
750 | if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1) | |
751 | { | |
752 | printf("Unable to parse \"%s\"", address); | |
9ff403f8 | 753 | exit(86); |
c55a77db PH |
754 | } |
755 | } | |
756 | else | |
757 | #endif | |
758 | ||
759 | /* Set up a remote IPv4 address */ | |
760 | ||
761 | { | |
762 | memset(&s_in4, 0, sizeof(s_in4)); | |
763 | s_in4.sin_family = AF_INET; | |
764 | s_in4.sin_port = htons(port); | |
765 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(address); | |
766 | } | |
767 | ||
768 | /* SIGALRM handler crashes out */ | |
769 | ||
770 | signal(SIGALRM, sigalrm_handler_crash); | |
771 | alarm(timeout); | |
772 | rc = connect(sock, s_ptr, s_len); | |
773 | save_errno = errno; | |
774 | alarm(0); | |
775 | ||
776 | /* A failure whose error code is "Interrupted system call" is in fact | |
777 | an externally applied timeout if the signal handler has been run. */ | |
778 | ||
779 | if (rc < 0) | |
780 | { | |
781 | close(sock); | |
41fdef91 | 782 | printf("connect failed: %s\n", strerror(save_errno)); |
9ff403f8 | 783 | exit(85); |
c55a77db PH |
784 | } |
785 | ||
786 | printf("connected\n"); | |
787 | ||
788 | ||
789 | /* --------------- Set up for OpenSSL --------------- */ | |
790 | ||
791 | #ifdef HAVE_OPENSSL | |
792 | SSL_library_init(); | |
793 | SSL_load_error_strings(); | |
794 | ||
795 | ctx = SSL_CTX_new(SSLv23_method()); | |
796 | if (ctx == NULL) | |
797 | { | |
798 | printf ("SSL_CTX_new failed\n"); | |
9ff403f8 | 799 | exit(84); |
c55a77db PH |
800 | } |
801 | ||
802 | if (certfile != NULL) | |
803 | { | |
804 | if (!SSL_CTX_use_certificate_file(ctx, certfile, SSL_FILETYPE_PEM)) | |
805 | { | |
806 | printf("SSL_CTX_use_certificate_file failed\n"); | |
9ff403f8 | 807 | exit(83); |
c55a77db PH |
808 | } |
809 | printf("Certificate file = %s\n", certfile); | |
810 | } | |
811 | ||
812 | if (keyfile != NULL) | |
813 | { | |
814 | if (!SSL_CTX_use_PrivateKey_file(ctx, keyfile, SSL_FILETYPE_PEM)) | |
815 | { | |
816 | printf("SSL_CTX_use_PrivateKey_file failed\n"); | |
9ff403f8 | 817 | exit(82); |
c55a77db PH |
818 | } |
819 | printf("Key file = %s\n", keyfile); | |
820 | } | |
821 | ||
822 | SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_BOTH); | |
823 | SSL_CTX_set_timeout(ctx, 200); | |
824 | SSL_CTX_set_info_callback(ctx, (void (*)())info_callback); | |
825 | #endif | |
826 | ||
827 | ||
828 | /* --------------- Set up for GnuTLS --------------- */ | |
829 | ||
830 | #ifdef HAVE_GNUTLS | |
831 | if (certfile != NULL) printf("Certificate file = %s\n", certfile); | |
832 | if (keyfile != NULL) printf("Key file = %s\n", keyfile); | |
833 | tls_init(certfile, keyfile); | |
834 | tls_session = tls_session_init(); | |
348051ad | 835 | #ifdef HAVE_OCSP |
2b4a568d JH |
836 | if (ocsp_stapling) |
837 | gnutls_ocsp_status_request_enable_client(tls_session, NULL, 0, NULL); | |
348051ad | 838 | #endif |
fc4fcc34 | 839 | gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr_t)(intptr_t)sock); |
c55a77db PH |
840 | |
841 | /* When the server asks for a certificate and the client does not have one, | |
842 | there is a SIGPIPE error in the gnutls_handshake() function for some reason | |
843 | that is not understood. As luck would have it, this has never hit Exim itself | |
844 | because it ignores SIGPIPE errors. Doing the same here allows it all to work as | |
845 | one wants. */ | |
846 | ||
847 | signal(SIGPIPE, SIG_IGN); | |
848 | #endif | |
849 | ||
850 | /* ---------------------------------------------- */ | |
851 | ||
852 | ||
853 | /* Start TLS session if configured to do so without STARTTLS */ | |
854 | ||
855 | #ifdef HAVE_TLS | |
856 | if (tls_on_connect) | |
857 | { | |
858 | printf("Attempting to start TLS\n"); | |
859 | ||
fc4fcc34 | 860 | #ifdef HAVE_OPENSSL |
c55a77db | 861 | tls_active = tls_start(sock, &ssl, ctx); |
fc4fcc34 | 862 | #endif |
c55a77db | 863 | |
fc4fcc34 JH |
864 | #ifdef HAVE_GNUTLS |
865 | { | |
866 | int rc; | |
c55a77db PH |
867 | sigalrm_seen = FALSE; |
868 | alarm(timeout); | |
fc4fcc34 JH |
869 | do { |
870 | rc = gnutls_handshake(tls_session); | |
871 | } while (rc < 0 && gnutls_error_is_fatal(rc) == 0); | |
872 | tls_active = rc >= 0; | |
c55a77db | 873 | alarm(0); |
fc4fcc34 JH |
874 | |
875 | if (!tls_active) printf("%s\n", gnutls_strerror(rc)); | |
876 | } | |
877 | #endif | |
c55a77db PH |
878 | |
879 | if (!tls_active) | |
880 | printf("Failed to start TLS\n"); | |
fc4fcc34 | 881 | #if defined(HAVE_GNUTLS) && defined(HAVE_OCSP) |
2b4a568d JH |
882 | else if ( ocsp_stapling |
883 | && gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) | |
884 | printf("Failed to verify certificate status\n"); | |
fc4fcc34 | 885 | #endif |
c55a77db PH |
886 | else |
887 | printf("Succeeded in starting TLS\n"); | |
888 | } | |
889 | #endif | |
890 | ||
a719fce4 | 891 | while (fgets(CS outbuffer, sizeof(outbuffer), stdin) != NULL) |
c55a77db | 892 | { |
a719fce4 | 893 | int n = (int)strlen(CS outbuffer); |
8dbb958a JH |
894 | |
895 | /* Strip trailing newline */ | |
896 | if (outbuffer[n-1] == '\n') outbuffer[--n] = 0; | |
c55a77db PH |
897 | |
898 | /* Expect incoming */ | |
899 | ||
a719fce4 | 900 | if (strncmp(CS outbuffer, "??? ", 4) == 0) |
c55a77db PH |
901 | { |
902 | unsigned char *lineptr; | |
903 | printf("%s\n", outbuffer); | |
904 | ||
905 | if (*inptr == 0) /* Refill input buffer */ | |
906 | { | |
907 | if (tls_active) | |
908 | { | |
909 | #ifdef HAVE_OPENSSL | |
910 | rc = SSL_read (ssl, inbuffer, sizeof(inbuffer) - 1); | |
911 | #endif | |
912 | #ifdef HAVE_GNUTLS | |
913 | rc = gnutls_record_recv(tls_session, CS inbuffer, sizeof(inbuffer) - 1); | |
914 | #endif | |
915 | } | |
916 | else | |
917 | { | |
918 | alarm(timeout); | |
919 | rc = read(sock, inbuffer, sizeof(inbuffer)); | |
920 | alarm(0); | |
921 | } | |
922 | ||
923 | if (rc < 0) | |
924 | { | |
925 | printf("Read error %s\n", strerror(errno)); | |
9ff403f8 | 926 | exit(81) ; |
c55a77db PH |
927 | } |
928 | else if (rc == 0) | |
929 | { | |
930 | printf("Unexpected EOF read\n"); | |
931 | close(sock); | |
9ff403f8 | 932 | exit(80); |
c55a77db PH |
933 | } |
934 | else | |
935 | { | |
936 | inbuffer[rc] = 0; | |
937 | inptr = inbuffer; | |
938 | } | |
939 | } | |
940 | ||
941 | lineptr = inptr; | |
942 | while (*inptr != 0 && *inptr != '\r' && *inptr != '\n') inptr++; | |
943 | if (*inptr != 0) | |
944 | { | |
945 | *inptr++ = 0; | |
946 | if (*inptr == '\n') inptr++; | |
947 | } | |
948 | ||
949 | printf("<<< %s\n", lineptr); | |
a719fce4 | 950 | if (strncmp(CS lineptr, CS outbuffer + 4, (int)strlen(CS outbuffer) - 4) != 0) |
c55a77db PH |
951 | { |
952 | printf("\n******** Input mismatch ********\n"); | |
9ff403f8 | 953 | exit(79); |
c55a77db PH |
954 | } |
955 | ||
956 | #ifdef HAVE_TLS | |
957 | if (sent_starttls) | |
958 | { | |
959 | if (lineptr[0] == '2') | |
960 | { | |
2b4a568d JH |
961 | int rc; |
962 | unsigned int verify; | |
963 | ||
c55a77db PH |
964 | printf("Attempting to start TLS\n"); |
965 | fflush(stdout); | |
966 | ||
967 | #ifdef HAVE_OPENSSL | |
968 | tls_active = tls_start(sock, &ssl, ctx); | |
969 | #endif | |
970 | ||
971 | #ifdef HAVE_GNUTLS | |
fc4fcc34 JH |
972 | { |
973 | int rc; | |
974 | sigalrm_seen = FALSE; | |
975 | alarm(timeout); | |
976 | do { | |
977 | rc = gnutls_handshake(tls_session); | |
978 | } while (rc < 0 && gnutls_error_is_fatal(rc) == 0); | |
979 | tls_active = rc >= 0; | |
980 | alarm(0); | |
981 | ||
982 | if (!tls_active) printf("%s\n", gnutls_strerror(rc)); | |
983 | } | |
c55a77db PH |
984 | #endif |
985 | ||
986 | if (!tls_active) | |
987 | { | |
988 | printf("Failed to start TLS\n"); | |
989 | fflush(stdout); | |
990 | } | |
2b4a568d JH |
991 | #ifdef HAVE_GNUTLS |
992 | else if (ocsp_stapling) | |
993 | { | |
994 | if ((rc= gnutls_certificate_verify_peers2(tls_session, &verify)) < 0) | |
995 | { | |
996 | printf("Failed to verify certificate: %s\n", gnutls_strerror(rc)); | |
997 | fflush(stdout); | |
998 | } | |
999 | else if (verify & (GNUTLS_CERT_INVALID|GNUTLS_CERT_REVOKED)) | |
1000 | { | |
1001 | printf("Bad certificate\n"); | |
1002 | fflush(stdout); | |
1003 | } | |
348051ad | 1004 | #ifdef HAVE_OCSP |
2b4a568d JH |
1005 | else if (gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) |
1006 | { | |
1007 | printf("Failed to verify certificate status\n"); | |
1008 | { | |
1009 | gnutls_datum_t stapling; | |
1010 | gnutls_ocsp_resp_t resp; | |
1011 | gnutls_datum_t printed; | |
1012 | if ( (rc= gnutls_ocsp_status_request_get(tls_session, &stapling)) == 0 | |
1013 | && (rc= gnutls_ocsp_resp_init(&resp)) == 0 | |
1014 | && (rc= gnutls_ocsp_resp_import(resp, &stapling)) == 0 | |
1015 | && (rc= gnutls_ocsp_resp_print(resp, GNUTLS_OCSP_PRINT_FULL, &printed)) == 0 | |
1016 | ) | |
1017 | { | |
1018 | fprintf(stderr, "%.4096s", printed.data); | |
1019 | gnutls_free(printed.data); | |
1020 | } | |
1021 | else | |
1022 | (void) fprintf(stderr,"ocsp decode: %s", gnutls_strerror(rc)); | |
1023 | } | |
1024 | fflush(stdout); | |
1025 | } | |
348051ad | 1026 | #endif |
2b4a568d JH |
1027 | } |
1028 | #endif | |
c55a77db PH |
1029 | else |
1030 | printf("Succeeded in starting TLS\n"); | |
1031 | } | |
1032 | else printf("Abandoning TLS start attempt\n"); | |
1033 | } | |
1034 | sent_starttls = 0; | |
1035 | #endif | |
1036 | } | |
1037 | ||
1038 | /* Wait for a bit before proceeding */ | |
1039 | ||
a719fce4 | 1040 | else if (strncmp(CS outbuffer, "+++ ", 4) == 0) |
c55a77db PH |
1041 | { |
1042 | printf("%s\n", outbuffer); | |
a719fce4 | 1043 | sleep(atoi(CS outbuffer + 4)); |
c55a77db PH |
1044 | } |
1045 | ||
1046 | /* Send outgoing, but barf if unconsumed incoming */ | |
1047 | ||
1048 | else | |
1049 | { | |
1050 | unsigned char *escape; | |
1051 | ||
1052 | if (*inptr != 0) | |
1053 | { | |
1054 | printf("Unconsumed input: %s", inptr); | |
1055 | printf(" About to send: %s\n", outbuffer); | |
9ff403f8 | 1056 | exit(78); |
c55a77db PH |
1057 | } |
1058 | ||
1059 | #ifdef HAVE_TLS | |
1060 | ||
1061 | /* Shutdown TLS */ | |
1062 | ||
e265af1f JH |
1063 | if (strcmp(CS outbuffer, "stoptls") == 0 || |
1064 | strcmp(CS outbuffer, "STOPTLS") == 0) | |
c55a77db PH |
1065 | { |
1066 | if (!tls_active) | |
1067 | { | |
1068 | printf("STOPTLS read when TLS not active\n"); | |
9ff403f8 | 1069 | exit(77); |
c55a77db PH |
1070 | } |
1071 | printf("Shutting down TLS encryption\n"); | |
1072 | ||
1073 | #ifdef HAVE_OPENSSL | |
1074 | SSL_shutdown(ssl); | |
1075 | SSL_free(ssl); | |
1076 | #endif | |
1077 | ||
1078 | #ifdef HAVE_GNUTLS | |
1079 | gnutls_bye(tls_session, GNUTLS_SHUT_WR); | |
1080 | gnutls_deinit(tls_session); | |
1081 | tls_session = NULL; | |
1082 | gnutls_global_deinit(); | |
1083 | #endif | |
1084 | ||
1085 | tls_active = 0; | |
1086 | continue; | |
1087 | } | |
1088 | ||
1089 | /* Remember that we sent STARTTLS */ | |
1090 | ||
e265af1f JH |
1091 | sent_starttls = (strcmp(CS outbuffer, "starttls") == 0 || |
1092 | strcmp(CS outbuffer, "STARTTLS") == 0); | |
c55a77db PH |
1093 | |
1094 | /* Fudge: if the command is "starttls_wait", we send the starttls bit, | |
1095 | but we haven't set the flag, so that there is no negotiation. This is for | |
1096 | testing the server's timeout. */ | |
1097 | ||
e265af1f | 1098 | if (strcmp(CS outbuffer, "starttls_wait") == 0) |
c55a77db PH |
1099 | { |
1100 | outbuffer[8] = 0; | |
1101 | n = 8; | |
1102 | } | |
1103 | #endif | |
1104 | ||
1105 | printf(">>> %s\n", outbuffer); | |
a719fce4 | 1106 | strcpy(CS outbuffer + n, "\r\n"); |
c55a77db PH |
1107 | |
1108 | /* Turn "\n" and "\r" into the relevant characters. This is a hack. */ | |
1109 | ||
a719fce4 | 1110 | while ((escape = US strstr(CS outbuffer, "\\r")) != NULL) |
c55a77db PH |
1111 | { |
1112 | *escape = '\r'; | |
1113 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
1114 | n--; | |
1115 | } | |
1116 | ||
e265af1f | 1117 | while ((escape = US strstr(CS outbuffer, "\\n")) != NULL) |
c55a77db PH |
1118 | { |
1119 | *escape = '\n'; | |
1120 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
1121 | n--; | |
1122 | } | |
1123 | ||
1124 | /* OK, do it */ | |
1125 | ||
1126 | alarm(timeout); | |
1127 | if (tls_active) | |
1128 | { | |
1129 | #ifdef HAVE_OPENSSL | |
1130 | rc = SSL_write (ssl, outbuffer, n + 2); | |
1131 | #endif | |
1132 | #ifdef HAVE_GNUTLS | |
1133 | rc = gnutls_record_send(tls_session, CS outbuffer, n + 2); | |
1134 | if (rc < 0) | |
1135 | { | |
1136 | printf("GnuTLS write error: %s\n", gnutls_strerror(rc)); | |
9ff403f8 | 1137 | exit(76); |
c55a77db PH |
1138 | } |
1139 | #endif | |
1140 | } | |
1141 | else | |
1142 | { | |
1143 | rc = write(sock, outbuffer, n + 2); | |
1144 | } | |
1145 | alarm(0); | |
1146 | ||
1147 | if (rc < 0) | |
1148 | { | |
1149 | printf("Write error: %s\n", strerror(errno)); | |
9ff403f8 | 1150 | exit(75); |
c55a77db PH |
1151 | } |
1152 | } | |
1153 | } | |
1154 | ||
1155 | printf("End of script\n"); | |
60d10ce7 JH |
1156 | shutdown(sock, SHUT_WR); |
1157 | while ((rc = read(sock, inbuffer, sizeof(inbuffer))) > 0) ; | |
c55a77db PH |
1158 | close(sock); |
1159 | ||
1160 | exit(0); | |
1161 | } | |
1162 | ||
1163 | /* End of client.c */ |