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> | |
5ddc9771 | 27 | #include <netinet/tcp.h> |
c55a77db PH |
28 | |
29 | #include <netdb.h> | |
30 | #include <arpa/inet.h> | |
31 | #include <sys/time.h> | |
32 | #include <sys/resource.h> | |
33 | #include <sys/socket.h> | |
34 | #include <sys/stat.h> | |
35 | #include <fcntl.h> | |
36 | #include <unistd.h> | |
37 | #include <utime.h> | |
38 | ||
39 | #ifdef AF_INET6 | |
40 | #define HAVE_IPV6 1 | |
41 | #endif | |
42 | ||
43 | #ifndef S_ADDR_TYPE | |
44 | #define S_ADDR_TYPE u_long | |
45 | #endif | |
46 | ||
47 | typedef unsigned char uschar; | |
48 | ||
49 | #define CS (char *) | |
50 | #define US (unsigned char *) | |
51 | ||
52 | #define FALSE 0 | |
53 | #define TRUE 1 | |
54 | ||
55 | ||
56 | ||
57 | static int sigalrm_seen = 0; | |
58 | ||
59 | ||
60 | /* TLS support can be optionally included, either for OpenSSL or GnuTLS. The | |
61 | latter needs a whole pile of tables. */ | |
c55a77db | 62 | #ifdef HAVE_OPENSSL |
348051ad JH |
63 | # define HAVE_TLS |
64 | # include <openssl/crypto.h> | |
65 | # include <openssl/x509.h> | |
66 | # include <openssl/pem.h> | |
67 | # include <openssl/ssl.h> | |
68 | # include <openssl/err.h> | |
69 | # include <openssl/rand.h> | |
839a3b0d JH |
70 | |
71 | # if OPENSSL_VERSION_NUMBER < 0x0090806fL && !defined(DISABLE_OCSP) && !defined(OPENSSL_NO_TLSEXT) | |
eca4debb TL |
72 | # warning "OpenSSL library version too old; define DISABLE_OCSP in Makefile" |
73 | # define DISABLE_OCSP | |
74 | # endif | |
6d68e1c7 TL |
75 | # ifndef DISABLE_OCSP |
76 | # include <openssl/ocsp.h> | |
77 | # endif | |
c55a77db PH |
78 | #endif |
79 | ||
80 | ||
81 | #ifdef HAVE_GNUTLS | |
348051ad JH |
82 | # define HAVE_TLS |
83 | # include <gnutls/gnutls.h> | |
84 | # include <gnutls/x509.h> | |
85 | # if GNUTLS_VERSION_NUMBER >= 0x030103 | |
86 | # define HAVE_OCSP | |
87 | # include <gnutls/ocsp.h> | |
5597be31 JH |
88 | # endif |
89 | # ifndef GNUTLS_NO_EXTENSIONS | |
90 | # define GNUTLS_NO_EXTENSIONS 0 | |
348051ad | 91 | # endif |
c55a77db | 92 | |
348051ad | 93 | # define DH_BITS 768 |
c55a77db PH |
94 | |
95 | /* Local static variables for GNUTLS */ | |
96 | ||
fc4fcc34 | 97 | static gnutls_dh_params_t dh_params = NULL; |
c55a77db PH |
98 | |
99 | static gnutls_certificate_credentials_t x509_cred = NULL; | |
fc4fcc34 | 100 | static gnutls_session_t tls_session = NULL; |
c55a77db PH |
101 | |
102 | static int ssl_session_timeout = 200; | |
103 | ||
104 | /* Priorities for TLS algorithms to use. */ | |
105 | ||
fc4fcc34 | 106 | #if GNUTLS_VERSION_NUMBER < 0x030400 |
c55a77db PH |
107 | static const int protocol_priority[16] = { GNUTLS_TLS1, GNUTLS_SSL3, 0 }; |
108 | ||
109 | static const int kx_priority[16] = { | |
110 | GNUTLS_KX_RSA, | |
111 | GNUTLS_KX_DHE_DSS, | |
112 | GNUTLS_KX_DHE_RSA, | |
c55a77db PH |
113 | 0 }; |
114 | ||
115 | static int default_cipher_priority[16] = { | |
116 | GNUTLS_CIPHER_AES_256_CBC, | |
117 | GNUTLS_CIPHER_AES_128_CBC, | |
118 | GNUTLS_CIPHER_3DES_CBC, | |
119 | GNUTLS_CIPHER_ARCFOUR_128, | |
120 | 0 }; | |
121 | ||
122 | static const int mac_priority[16] = { | |
123 | GNUTLS_MAC_SHA, | |
124 | GNUTLS_MAC_MD5, | |
125 | 0 }; | |
126 | ||
127 | static const int comp_priority[16] = { GNUTLS_COMP_NULL, 0 }; | |
fc4fcc34 | 128 | #endif |
c55a77db | 129 | |
348051ad | 130 | #endif /*HAVE_GNUTLS*/ |
c55a77db PH |
131 | |
132 | ||
133 | ||
2b4a568d JH |
134 | #ifdef HAVE_TLS |
135 | char * ocsp_stapling = NULL; | |
136 | #endif | |
137 | ||
c55a77db PH |
138 | |
139 | /************************************************* | |
140 | * SIGALRM handler - crash out * | |
141 | *************************************************/ | |
142 | ||
143 | static void | |
144 | sigalrm_handler_crash(int sig) | |
145 | { | |
146 | sig = sig; /* Keep picky compilers happy */ | |
147 | printf("\nClient timed out\n"); | |
148 | exit(99); | |
149 | } | |
150 | ||
151 | ||
152 | /************************************************* | |
153 | * SIGALRM handler - set flag * | |
154 | *************************************************/ | |
155 | ||
156 | static void | |
157 | sigalrm_handler_flag(int sig) | |
158 | { | |
159 | sig = sig; /* Keep picky compilers happy */ | |
160 | sigalrm_seen = 1; | |
161 | } | |
162 | ||
163 | ||
164 | ||
165 | /****************************************************************************/ | |
166 | /****************************************************************************/ | |
167 | ||
168 | #ifdef HAVE_OPENSSL | |
3b3634d0 | 169 | # ifndef DISABLE_OCSP |
f5d78688 | 170 | |
ee5b1e28 | 171 | static STACK_OF(X509) * |
3b3634d0 | 172 | chain_from_pem_file(const uschar * file) |
ee5b1e28 | 173 | { |
3b3634d0 JH |
174 | BIO * bp; |
175 | X509 * x; | |
176 | STACK_OF(X509) * sk; | |
ee5b1e28 | 177 | |
3b3634d0 JH |
178 | if (!(sk = sk_X509_new_null())) return NULL; |
179 | if (!(bp = BIO_new_file(CS file, "r"))) return NULL; | |
180 | while ((x = PEM_read_bio_X509(bp, NULL, 0, NULL))) | |
181 | sk_X509_push(sk, x); | |
182 | BIO_free(bp); | |
ee5b1e28 JH |
183 | return sk; |
184 | } | |
185 | ||
3b3634d0 JH |
186 | |
187 | ||
ee5b1e28 JH |
188 | static void |
189 | cert_stack_free(STACK_OF(X509) * sk) | |
190 | { | |
191 | while (sk_X509_num(sk) > 0) (void) sk_X509_pop(sk); | |
192 | sk_X509_free(sk); | |
193 | } | |
194 | ||
195 | ||
f5d78688 JH |
196 | static int |
197 | tls_client_stapling_cb(SSL *s, void *arg) | |
198 | { | |
199 | const unsigned char *p; | |
200 | int len; | |
201 | OCSP_RESPONSE *rsp; | |
202 | OCSP_BASICRESP *bs; | |
ee5b1e28 | 203 | STACK_OF(X509) * sk; |
f5d78688 JH |
204 | int ret = 1; |
205 | ||
206 | len = SSL_get_tlsext_status_ocsp_resp(s, &p); | |
207 | /*BIO_printf(arg, "OCSP response: ");*/ | |
208 | if (!p) | |
209 | { | |
210 | BIO_printf(arg, "no response received\n"); | |
211 | return 1; | |
212 | } | |
213 | if(!(rsp = d2i_OCSP_RESPONSE(NULL, &p, len))) | |
214 | { | |
215 | BIO_printf(arg, "response parse error\n"); | |
216 | BIO_dump_indent(arg, (char *)p, len, 4); | |
217 | return 0; | |
218 | } | |
219 | if(!(bs = OCSP_response_get1_basic(rsp))) | |
220 | { | |
221 | BIO_printf(arg, "error parsing response\n"); | |
222 | return 0; | |
223 | } | |
224 | ||
ee5b1e28 | 225 | |
3b3634d0 | 226 | if (!(sk = chain_from_pem_file(ocsp_stapling))) |
f5d78688 JH |
227 | { |
228 | BIO_printf(arg, "error in cert setup\n"); | |
229 | return 0; | |
230 | } | |
231 | ||
ee5b1e28 JH |
232 | /* OCSP_basic_verify takes a "store" arg, but does not |
233 | use it for the chain verification, which is all we do | |
234 | when OCSP_NOVERIFY is set. The content from the wire | |
235 | (in "bs") and a cert-stack "sk" are all that is used. */ | |
236 | ||
237 | if(OCSP_basic_verify(bs, sk, NULL, OCSP_NOVERIFY) <= 0) | |
f5d78688 JH |
238 | { |
239 | BIO_printf(arg, "Response Verify Failure\n"); | |
240 | ERR_print_errors(arg); | |
241 | ret = 0; | |
242 | } | |
243 | else | |
244 | BIO_printf(arg, "Response verify OK\n"); | |
245 | ||
ee5b1e28 | 246 | cert_stack_free(sk); |
f5d78688 JH |
247 | return ret; |
248 | } | |
3b3634d0 | 249 | # endif /*DISABLE_OCSP*/ |
f5d78688 JH |
250 | |
251 | ||
c55a77db PH |
252 | /************************************************* |
253 | * Start an OpenSSL TLS session * | |
254 | *************************************************/ | |
255 | ||
2b4a568d JH |
256 | int |
257 | tls_start(int sock, SSL **ssl, SSL_CTX *ctx) | |
c55a77db PH |
258 | { |
259 | int rc; | |
57cde6e4 | 260 | static const unsigned char *sid_ctx = US"exim"; |
c55a77db PH |
261 | |
262 | RAND_load_file("client.c", -1); /* Not *very* random! */ | |
263 | ||
264 | *ssl = SSL_new (ctx); | |
57cde6e4 | 265 | SSL_set_session_id_context(*ssl, sid_ctx, strlen(CS sid_ctx)); |
c55a77db PH |
266 | SSL_set_fd (*ssl, sock); |
267 | SSL_set_connect_state(*ssl); | |
268 | ||
6d68e1c7 | 269 | #ifndef DISABLE_OCSP |
f5d78688 JH |
270 | if (ocsp_stapling) |
271 | { | |
272 | SSL_CTX_set_tlsext_status_cb(ctx, tls_client_stapling_cb); | |
273 | SSL_CTX_set_tlsext_status_arg(ctx, BIO_new_fp(stdout, BIO_NOCLOSE)); | |
274 | SSL_set_tlsext_status_type(*ssl, TLSEXT_STATUSTYPE_ocsp); | |
275 | } | |
6d68e1c7 | 276 | #endif |
f5d78688 | 277 | |
c55a77db PH |
278 | signal(SIGALRM, sigalrm_handler_flag); |
279 | sigalrm_seen = 0; | |
280 | alarm(5); | |
281 | rc = SSL_connect (*ssl); | |
282 | alarm(0); | |
283 | ||
284 | if (sigalrm_seen) | |
285 | { | |
286 | printf("SSL_connect timed out\n"); | |
287 | return 0; | |
288 | } | |
289 | ||
290 | if (rc <= 0) | |
291 | { | |
292 | ERR_print_errors_fp(stdout); | |
293 | return 0; | |
294 | } | |
295 | ||
296 | printf("SSL connection using %s\n", SSL_get_cipher (*ssl)); | |
297 | return 1; | |
298 | } | |
299 | ||
300 | ||
301 | /************************************************* | |
302 | * SSL Information callback * | |
303 | *************************************************/ | |
304 | ||
305 | static void | |
306 | info_callback(SSL *s, int where, int ret) | |
307 | { | |
308 | where = where; | |
309 | ret = ret; | |
310 | printf("SSL info: %s\n", SSL_state_string_long(s)); | |
311 | } | |
312 | #endif | |
313 | ||
314 | ||
315 | /****************************************************************************/ | |
316 | /****************************************************************************/ | |
317 | ||
318 | ||
319 | #ifdef HAVE_GNUTLS | |
320 | /************************************************* | |
321 | * Handle GnuTLS error * | |
322 | *************************************************/ | |
323 | ||
324 | /* Called from lots of places when errors occur before actually starting to do | |
325 | the TLS handshake, that is, while the session is still in clear. | |
326 | ||
327 | Argument: | |
328 | prefix prefix text | |
329 | err a GnuTLS error number, or 0 if local error | |
330 | ||
331 | Returns: doesn't - it dies | |
332 | */ | |
333 | ||
334 | static void | |
335 | gnutls_error(uschar *prefix, int err) | |
336 | { | |
bb727765 | 337 | fprintf(stderr, "GnuTLS connection error: %s:", prefix); |
c55a77db PH |
338 | if (err != 0) fprintf(stderr, " %s", gnutls_strerror(err)); |
339 | fprintf(stderr, "\n"); | |
9ff403f8 | 340 | exit(98); |
c55a77db PH |
341 | } |
342 | ||
343 | ||
344 | ||
345 | /************************************************* | |
bb727765 | 346 | * Setup up DH parameters * |
c55a77db PH |
347 | *************************************************/ |
348 | ||
349 | /* For the test suite, the parameters should always be available in the spool | |
350 | directory. */ | |
351 | ||
352 | static void | |
bb727765 | 353 | init_dh(void) |
c55a77db PH |
354 | { |
355 | int fd; | |
356 | int ret; | |
fc4fcc34 | 357 | gnutls_datum_t m; |
c55a77db PH |
358 | uschar filename[200]; |
359 | struct stat statbuf; | |
360 | ||
361 | /* Initialize the data structures for holding the parameters */ | |
362 | ||
c55a77db PH |
363 | ret = gnutls_dh_params_init(&dh_params); |
364 | if (ret < 0) gnutls_error(US"init dh_params", ret); | |
365 | ||
366 | /* Open the cache file for reading and if successful, read it and set up the | |
bb727765 | 367 | parameters. */ |
c55a77db PH |
368 | |
369 | fd = open("aux-fixed/gnutls-params", O_RDONLY, 0); | |
370 | if (fd < 0) | |
371 | { | |
372 | fprintf(stderr, "Failed to open spool/gnutls-params: %s\n", strerror(errno)); | |
9ff403f8 | 373 | exit(97); |
c55a77db PH |
374 | } |
375 | ||
376 | if (fstat(fd, &statbuf) < 0) | |
377 | { | |
378 | (void)close(fd); | |
379 | return gnutls_error(US"TLS cache stat failed", 0); | |
380 | } | |
381 | ||
382 | m.size = statbuf.st_size; | |
383 | m.data = malloc(m.size); | |
384 | if (m.data == NULL) | |
385 | return gnutls_error(US"memory allocation failed", 0); | |
386 | if (read(fd, m.data, m.size) != m.size) | |
387 | return gnutls_error(US"TLS cache read failed", 0); | |
388 | (void)close(fd); | |
389 | ||
c55a77db PH |
390 | ret = gnutls_dh_params_import_pkcs3(dh_params, &m, GNUTLS_X509_FMT_PEM); |
391 | if (ret < 0) return gnutls_error(US"DH params import", ret); | |
392 | free(m.data); | |
393 | } | |
394 | ||
395 | ||
396 | ||
397 | ||
398 | /************************************************* | |
399 | * Initialize for GnuTLS * | |
400 | *************************************************/ | |
401 | ||
402 | /* | |
403 | Arguments: | |
404 | certificate certificate file | |
405 | privatekey private key file | |
406 | */ | |
407 | ||
408 | static void | |
409 | tls_init(uschar *certificate, uschar *privatekey) | |
410 | { | |
411 | int rc; | |
412 | ||
413 | rc = gnutls_global_init(); | |
414 | if (rc < 0) gnutls_error(US"gnutls_global_init", rc); | |
415 | ||
bb727765 | 416 | /* Read D-H parameters from the cache file. */ |
c55a77db | 417 | |
bb727765 | 418 | init_dh(); |
c55a77db PH |
419 | |
420 | /* Create the credentials structure */ | |
421 | ||
422 | rc = gnutls_certificate_allocate_credentials(&x509_cred); | |
423 | if (rc < 0) gnutls_error(US"certificate_allocate_credentials", rc); | |
424 | ||
425 | /* Set the certificate and private keys */ | |
426 | ||
427 | if (certificate != NULL) | |
428 | { | |
429 | rc = gnutls_certificate_set_x509_key_file(x509_cred, CS certificate, | |
430 | CS privatekey, GNUTLS_X509_FMT_PEM); | |
431 | if (rc < 0) gnutls_error("gnutls_certificate", rc); | |
432 | } | |
433 | ||
434 | /* Associate the parameters with the x509 credentials structure. */ | |
435 | ||
436 | gnutls_certificate_set_dh_params(x509_cred, dh_params); | |
2b4a568d JH |
437 | |
438 | /* set the CA info for server-cert verify */ | |
439 | if (ocsp_stapling) | |
440 | gnutls_certificate_set_x509_trust_file(x509_cred, ocsp_stapling, | |
441 | GNUTLS_X509_FMT_PEM); | |
c55a77db PH |
442 | } |
443 | ||
444 | ||
445 | ||
446 | /************************************************* | |
447 | * Initialize a single GNUTLS session * | |
448 | *************************************************/ | |
449 | ||
fc4fcc34 | 450 | static gnutls_session_t |
c55a77db PH |
451 | tls_session_init(void) |
452 | { | |
fc4fcc34 | 453 | gnutls_session_t session; |
c55a77db | 454 | |
0886a95e | 455 | gnutls_init(&session, GNUTLS_CLIENT | GNUTLS_NO_EXTENSIONS); |
c55a77db | 456 | |
fc4fcc34 | 457 | #if GNUTLS_VERSION_NUMBER < 0x030400 |
c55a77db PH |
458 | gnutls_cipher_set_priority(session, default_cipher_priority); |
459 | gnutls_compression_set_priority(session, comp_priority); | |
460 | gnutls_kx_set_priority(session, kx_priority); | |
461 | gnutls_protocol_set_priority(session, protocol_priority); | |
462 | gnutls_mac_set_priority(session, mac_priority); | |
463 | ||
464 | gnutls_cred_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); | |
fc4fcc34 JH |
465 | #else |
466 | gnutls_set_default_priority(session); | |
467 | gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); | |
468 | #endif | |
c55a77db PH |
469 | |
470 | gnutls_dh_set_prime_bits(session, DH_BITS); | |
471 | gnutls_db_set_cache_expiration(session, ssl_session_timeout); | |
472 | ||
473 | return session; | |
474 | } | |
475 | #endif | |
476 | ||
477 | ||
478 | /****************************************************************************/ | |
479 | /****************************************************************************/ | |
480 | ||
481 | ||
482 | ||
483 | ||
484 | /************************************************* | |
485 | * Main Program * | |
486 | *************************************************/ | |
487 | ||
4fe99a6c | 488 | const char * const HELP_MESSAGE = "\n\ |
972e83f5 HSHR |
489 | Usage: client\n" |
490 | #ifdef HAVE_TLS | |
491 | "\ | |
492 | [-tls-on-connect]\n\ | |
493 | [-ocsp]\n" | |
494 | #endif | |
495 | "\ | |
496 | [-tn] n seconds timeout\n\ | |
4fe99a6c PP |
497 | <IP address>\n\ |
498 | <port>\n\ | |
499 | [<outgoing interface>]\n\ | |
500 | [<cert file>]\n\ | |
501 | [<key file>]\n\ | |
502 | \n"; | |
c55a77db PH |
503 | |
504 | int main(int argc, char **argv) | |
505 | { | |
506 | struct sockaddr *s_ptr; | |
507 | struct sockaddr_in s_in4; | |
508 | char *interface = NULL; | |
509 | char *address = NULL; | |
510 | char *certfile = NULL; | |
511 | char *keyfile = NULL; | |
1ec3f27d | 512 | char *end = NULL; |
c55a77db PH |
513 | int argi = 1; |
514 | int host_af, port, s_len, rc, sock, save_errno; | |
d528a389 | 515 | int timeout = 5; |
c55a77db PH |
516 | int tls_active = 0; |
517 | int sent_starttls = 0; | |
518 | int tls_on_connect = 0; | |
1ec3f27d | 519 | long tmplong; |
c55a77db PH |
520 | |
521 | #if HAVE_IPV6 | |
522 | struct sockaddr_in6 s_in6; | |
523 | #endif | |
524 | ||
525 | #ifdef HAVE_OPENSSL | |
526 | SSL_CTX* ctx; | |
527 | SSL* ssl; | |
528 | #endif | |
529 | ||
530 | unsigned char outbuffer[10240]; | |
531 | unsigned char inbuffer[10240]; | |
532 | unsigned char *inptr = inbuffer; | |
533 | ||
534 | *inptr = 0; /* Buffer empty */ | |
535 | ||
536 | /* Options */ | |
537 | ||
538 | while (argc >= argi + 1 && argv[argi][0] == '-') | |
539 | { | |
4fe99a6c PP |
540 | if (strcmp(argv[argi], "-help") == 0 || |
541 | strcmp(argv[argi], "--help") == 0 || | |
542 | strcmp(argv[argi], "-h") == 0) | |
543 | { | |
dd4c8678 | 544 | puts(HELP_MESSAGE); |
4fe99a6c PP |
545 | exit(0); |
546 | } | |
c55a77db PH |
547 | if (strcmp(argv[argi], "-tls-on-connect") == 0) |
548 | { | |
549 | tls_on_connect = 1; | |
550 | argi++; | |
551 | } | |
2b4a568d | 552 | #ifdef HAVE_TLS |
f5d78688 JH |
553 | else if (strcmp(argv[argi], "-ocsp") == 0) |
554 | { | |
555 | if (argc < ++argi + 1) | |
556 | { | |
557 | fprintf(stderr, "Missing required certificate file for ocsp option\n"); | |
9ff403f8 | 558 | exit(96); |
f5d78688 JH |
559 | } |
560 | ocsp_stapling = argv[argi++]; | |
561 | } | |
2b4a568d | 562 | |
f5d78688 | 563 | #endif |
c55a77db PH |
564 | else if (argv[argi][1] == 't' && isdigit(argv[argi][2])) |
565 | { | |
1ec3f27d PP |
566 | tmplong = strtol(argv[argi]+2, &end, 10); |
567 | if (end == argv[argi]+2 || *end) | |
568 | { | |
569 | fprintf(stderr, "Failed to parse seconds from option <%s>\n", | |
570 | argv[argi]); | |
9ff403f8 | 571 | exit(95); |
1ec3f27d PP |
572 | } |
573 | if (tmplong > 10000L) | |
574 | { | |
dd4c8678 | 575 | fprintf(stderr, "Unreasonably long wait of %ld seconds requested\n", |
1ec3f27d | 576 | tmplong); |
9ff403f8 | 577 | exit(94); |
1ec3f27d PP |
578 | } |
579 | if (tmplong < 0L) | |
580 | { | |
dd4c8678 | 581 | fprintf(stderr, "Timeout must not be negative (%ld)\n", tmplong); |
9ff403f8 | 582 | exit(93); |
1ec3f27d PP |
583 | } |
584 | timeout = (int) tmplong; | |
c55a77db PH |
585 | argi++; |
586 | } | |
587 | else | |
588 | { | |
1ec3f27d | 589 | fprintf(stderr, "Unrecognized option %s\n", argv[argi]); |
9ff403f8 | 590 | exit(92); |
c55a77db PH |
591 | } |
592 | } | |
593 | ||
594 | /* Mandatory 1st arg is IP address */ | |
595 | ||
596 | if (argc < argi+1) | |
597 | { | |
1ec3f27d | 598 | fprintf(stderr, "No IP address given\n"); |
9ff403f8 | 599 | exit(91); |
c55a77db PH |
600 | } |
601 | ||
602 | address = argv[argi++]; | |
603 | host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET; | |
604 | ||
605 | /* Mandatory 2nd arg is port */ | |
606 | ||
607 | if (argc < argi+1) | |
608 | { | |
1ec3f27d | 609 | fprintf(stderr, "No port number given\n"); |
9ff403f8 | 610 | exit(90); |
c55a77db PH |
611 | } |
612 | ||
613 | port = atoi(argv[argi++]); | |
614 | ||
615 | /* Optional next arg is interface */ | |
616 | ||
617 | if (argc > argi && | |
618 | (isdigit((unsigned char)argv[argi][0]) || argv[argi][0] == ':')) | |
619 | interface = argv[argi++]; | |
620 | ||
621 | /* Any more arguments are the name of a certificate file and key file */ | |
622 | ||
623 | if (argc > argi) certfile = argv[argi++]; | |
624 | if (argc > argi) keyfile = argv[argi++]; | |
625 | ||
626 | ||
627 | #if HAVE_IPV6 | |
628 | /* For an IPv6 address, use an IPv6 sockaddr structure. */ | |
629 | ||
630 | if (host_af == AF_INET6) | |
631 | { | |
632 | s_ptr = (struct sockaddr *)&s_in6; | |
633 | s_len = sizeof(s_in6); | |
634 | } | |
635 | else | |
636 | #endif | |
637 | ||
638 | /* For an IPv4 address, use an IPv4 sockaddr structure, | |
639 | even on an IPv6 system. */ | |
640 | ||
641 | { | |
642 | s_ptr = (struct sockaddr *)&s_in4; | |
643 | s_len = sizeof(s_in4); | |
644 | } | |
645 | ||
646 | printf("Connecting to %s port %d ... ", address, port); | |
647 | ||
648 | sock = socket(host_af, SOCK_STREAM, 0); | |
649 | if (sock < 0) | |
650 | { | |
651 | printf("socket creation failed: %s\n", strerror(errno)); | |
9ff403f8 | 652 | exit(89); |
c55a77db PH |
653 | } |
654 | ||
655 | /* Bind to a specific interface if requested. On an IPv6 system, this has | |
656 | to be of the same family as the address we are calling. On an IPv4 system the | |
657 | test is redundant, but it keeps the code tidier. */ | |
658 | ||
659 | if (interface != NULL) | |
660 | { | |
661 | int interface_af = (strchr(interface, ':') != NULL)? AF_INET6 : AF_INET; | |
662 | ||
663 | if (interface_af == host_af) | |
664 | { | |
665 | #if HAVE_IPV6 | |
666 | ||
667 | /* Set up for IPv6 binding */ | |
668 | ||
669 | if (host_af == AF_INET6) | |
670 | { | |
671 | memset(&s_in6, 0, sizeof(s_in6)); | |
672 | s_in6.sin6_family = AF_INET6; | |
673 | s_in6.sin6_port = 0; | |
674 | if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1) | |
675 | { | |
676 | printf("Unable to parse \"%s\"", interface); | |
9ff403f8 | 677 | exit(88); |
c55a77db PH |
678 | } |
679 | } | |
680 | else | |
681 | #endif | |
682 | ||
683 | /* Set up for IPv4 binding */ | |
684 | ||
685 | { | |
686 | memset(&s_in4, 0, sizeof(s_in4)); | |
687 | s_in4.sin_family = AF_INET; | |
688 | s_in4.sin_port = 0; | |
689 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(interface); | |
690 | } | |
691 | ||
692 | /* Bind */ | |
693 | ||
694 | if (bind(sock, s_ptr, s_len) < 0) | |
695 | { | |
696 | printf("Unable to bind outgoing SMTP call to %s: %s", | |
697 | interface, strerror(errno)); | |
9ff403f8 | 698 | exit(87); |
c55a77db PH |
699 | } |
700 | } | |
701 | } | |
702 | ||
703 | /* Set up a remote IPv6 address */ | |
704 | ||
705 | #if HAVE_IPV6 | |
706 | if (host_af == AF_INET6) | |
707 | { | |
708 | memset(&s_in6, 0, sizeof(s_in6)); | |
709 | s_in6.sin6_family = AF_INET6; | |
710 | s_in6.sin6_port = htons(port); | |
711 | if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1) | |
712 | { | |
713 | printf("Unable to parse \"%s\"", address); | |
9ff403f8 | 714 | exit(86); |
c55a77db PH |
715 | } |
716 | } | |
717 | else | |
718 | #endif | |
719 | ||
720 | /* Set up a remote IPv4 address */ | |
721 | ||
722 | { | |
723 | memset(&s_in4, 0, sizeof(s_in4)); | |
724 | s_in4.sin_family = AF_INET; | |
725 | s_in4.sin_port = htons(port); | |
726 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(address); | |
727 | } | |
728 | ||
729 | /* SIGALRM handler crashes out */ | |
730 | ||
731 | signal(SIGALRM, sigalrm_handler_crash); | |
732 | alarm(timeout); | |
733 | rc = connect(sock, s_ptr, s_len); | |
734 | save_errno = errno; | |
735 | alarm(0); | |
736 | ||
737 | /* A failure whose error code is "Interrupted system call" is in fact | |
738 | an externally applied timeout if the signal handler has been run. */ | |
739 | ||
740 | if (rc < 0) | |
741 | { | |
742 | close(sock); | |
41fdef91 | 743 | printf("connect failed: %s\n", strerror(save_errno)); |
9ff403f8 | 744 | exit(85); |
c55a77db PH |
745 | } |
746 | ||
747 | printf("connected\n"); | |
748 | ||
749 | ||
750 | /* --------------- Set up for OpenSSL --------------- */ | |
751 | ||
752 | #ifdef HAVE_OPENSSL | |
753 | SSL_library_init(); | |
754 | SSL_load_error_strings(); | |
755 | ||
756 | ctx = SSL_CTX_new(SSLv23_method()); | |
757 | if (ctx == NULL) | |
758 | { | |
759 | printf ("SSL_CTX_new failed\n"); | |
9ff403f8 | 760 | exit(84); |
c55a77db PH |
761 | } |
762 | ||
763 | if (certfile != NULL) | |
764 | { | |
765 | if (!SSL_CTX_use_certificate_file(ctx, certfile, SSL_FILETYPE_PEM)) | |
766 | { | |
767 | printf("SSL_CTX_use_certificate_file failed\n"); | |
9ff403f8 | 768 | exit(83); |
c55a77db PH |
769 | } |
770 | printf("Certificate file = %s\n", certfile); | |
771 | } | |
772 | ||
773 | if (keyfile != NULL) | |
774 | { | |
775 | if (!SSL_CTX_use_PrivateKey_file(ctx, keyfile, SSL_FILETYPE_PEM)) | |
776 | { | |
777 | printf("SSL_CTX_use_PrivateKey_file failed\n"); | |
9ff403f8 | 778 | exit(82); |
c55a77db PH |
779 | } |
780 | printf("Key file = %s\n", keyfile); | |
781 | } | |
782 | ||
783 | SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_BOTH); | |
784 | SSL_CTX_set_timeout(ctx, 200); | |
785 | SSL_CTX_set_info_callback(ctx, (void (*)())info_callback); | |
786 | #endif | |
787 | ||
788 | ||
789 | /* --------------- Set up for GnuTLS --------------- */ | |
790 | ||
791 | #ifdef HAVE_GNUTLS | |
792 | if (certfile != NULL) printf("Certificate file = %s\n", certfile); | |
793 | if (keyfile != NULL) printf("Key file = %s\n", keyfile); | |
794 | tls_init(certfile, keyfile); | |
795 | tls_session = tls_session_init(); | |
348051ad | 796 | #ifdef HAVE_OCSP |
2b4a568d JH |
797 | if (ocsp_stapling) |
798 | gnutls_ocsp_status_request_enable_client(tls_session, NULL, 0, NULL); | |
348051ad | 799 | #endif |
fc4fcc34 | 800 | gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr_t)(intptr_t)sock); |
c55a77db PH |
801 | |
802 | /* When the server asks for a certificate and the client does not have one, | |
803 | there is a SIGPIPE error in the gnutls_handshake() function for some reason | |
804 | that is not understood. As luck would have it, this has never hit Exim itself | |
805 | because it ignores SIGPIPE errors. Doing the same here allows it all to work as | |
806 | one wants. */ | |
807 | ||
808 | signal(SIGPIPE, SIG_IGN); | |
809 | #endif | |
810 | ||
811 | /* ---------------------------------------------- */ | |
812 | ||
813 | ||
814 | /* Start TLS session if configured to do so without STARTTLS */ | |
815 | ||
816 | #ifdef HAVE_TLS | |
817 | if (tls_on_connect) | |
818 | { | |
819 | printf("Attempting to start TLS\n"); | |
820 | ||
fc4fcc34 | 821 | #ifdef HAVE_OPENSSL |
c55a77db | 822 | tls_active = tls_start(sock, &ssl, ctx); |
fc4fcc34 | 823 | #endif |
c55a77db | 824 | |
fc4fcc34 JH |
825 | #ifdef HAVE_GNUTLS |
826 | { | |
827 | int rc; | |
c55a77db PH |
828 | sigalrm_seen = FALSE; |
829 | alarm(timeout); | |
fc4fcc34 JH |
830 | do { |
831 | rc = gnutls_handshake(tls_session); | |
832 | } while (rc < 0 && gnutls_error_is_fatal(rc) == 0); | |
833 | tls_active = rc >= 0; | |
c55a77db | 834 | alarm(0); |
fc4fcc34 JH |
835 | |
836 | if (!tls_active) printf("%s\n", gnutls_strerror(rc)); | |
837 | } | |
838 | #endif | |
c55a77db PH |
839 | |
840 | if (!tls_active) | |
841 | printf("Failed to start TLS\n"); | |
fc4fcc34 | 842 | #if defined(HAVE_GNUTLS) && defined(HAVE_OCSP) |
2b4a568d JH |
843 | else if ( ocsp_stapling |
844 | && gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) | |
845 | printf("Failed to verify certificate status\n"); | |
fc4fcc34 | 846 | #endif |
c55a77db PH |
847 | else |
848 | printf("Succeeded in starting TLS\n"); | |
849 | } | |
850 | #endif | |
851 | ||
a719fce4 | 852 | while (fgets(CS outbuffer, sizeof(outbuffer), stdin) != NULL) |
c55a77db | 853 | { |
a719fce4 | 854 | int n = (int)strlen(CS outbuffer); |
8dbb958a JH |
855 | |
856 | /* Strip trailing newline */ | |
857 | if (outbuffer[n-1] == '\n') outbuffer[--n] = 0; | |
c55a77db PH |
858 | |
859 | /* Expect incoming */ | |
860 | ||
5ddc9771 JH |
861 | if ( strncmp(CS outbuffer, "???", 3) == 0 |
862 | && (outbuffer[3] == ' ' || outbuffer[3] == '*') | |
863 | ) | |
c55a77db PH |
864 | { |
865 | unsigned char *lineptr; | |
5ddc9771 JH |
866 | unsigned exp_eof = outbuffer[3] == '*'; |
867 | ||
c55a77db PH |
868 | printf("%s\n", outbuffer); |
869 | ||
870 | if (*inptr == 0) /* Refill input buffer */ | |
871 | { | |
872 | if (tls_active) | |
873 | { | |
874 | #ifdef HAVE_OPENSSL | |
875 | rc = SSL_read (ssl, inbuffer, sizeof(inbuffer) - 1); | |
876 | #endif | |
877 | #ifdef HAVE_GNUTLS | |
878 | rc = gnutls_record_recv(tls_session, CS inbuffer, sizeof(inbuffer) - 1); | |
879 | #endif | |
880 | } | |
881 | else | |
882 | { | |
883 | alarm(timeout); | |
884 | rc = read(sock, inbuffer, sizeof(inbuffer)); | |
885 | alarm(0); | |
886 | } | |
887 | ||
888 | if (rc < 0) | |
5ddc9771 | 889 | { |
c55a77db | 890 | printf("Read error %s\n", strerror(errno)); |
5ddc9771 JH |
891 | exit(81); |
892 | } | |
c55a77db | 893 | else if (rc == 0) |
5ddc9771 JH |
894 | if (exp_eof) |
895 | { | |
896 | printf("Expected EOF read\n"); | |
897 | continue; | |
898 | } | |
899 | else | |
900 | { | |
901 | printf("Enexpected EOF read\n"); | |
902 | close(sock); | |
903 | exit(80); | |
904 | } | |
905 | else if (exp_eof) | |
c55a77db | 906 | { |
5ddc9771 | 907 | printf("Expected EOF not read\n"); |
c55a77db | 908 | close(sock); |
5ddc9771 | 909 | exit(74); |
c55a77db PH |
910 | } |
911 | else | |
912 | { | |
913 | inbuffer[rc] = 0; | |
914 | inptr = inbuffer; | |
915 | } | |
916 | } | |
917 | ||
918 | lineptr = inptr; | |
919 | while (*inptr != 0 && *inptr != '\r' && *inptr != '\n') inptr++; | |
920 | if (*inptr != 0) | |
921 | { | |
922 | *inptr++ = 0; | |
923 | if (*inptr == '\n') inptr++; | |
924 | } | |
925 | ||
926 | printf("<<< %s\n", lineptr); | |
a719fce4 | 927 | if (strncmp(CS lineptr, CS outbuffer + 4, (int)strlen(CS outbuffer) - 4) != 0) |
c55a77db PH |
928 | { |
929 | printf("\n******** Input mismatch ********\n"); | |
9ff403f8 | 930 | exit(79); |
c55a77db PH |
931 | } |
932 | ||
933 | #ifdef HAVE_TLS | |
934 | if (sent_starttls) | |
935 | { | |
936 | if (lineptr[0] == '2') | |
937 | { | |
2b4a568d JH |
938 | int rc; |
939 | unsigned int verify; | |
940 | ||
c55a77db PH |
941 | printf("Attempting to start TLS\n"); |
942 | fflush(stdout); | |
943 | ||
944 | #ifdef HAVE_OPENSSL | |
945 | tls_active = tls_start(sock, &ssl, ctx); | |
946 | #endif | |
947 | ||
948 | #ifdef HAVE_GNUTLS | |
fc4fcc34 JH |
949 | { |
950 | int rc; | |
951 | sigalrm_seen = FALSE; | |
952 | alarm(timeout); | |
953 | do { | |
954 | rc = gnutls_handshake(tls_session); | |
955 | } while (rc < 0 && gnutls_error_is_fatal(rc) == 0); | |
956 | tls_active = rc >= 0; | |
957 | alarm(0); | |
958 | ||
959 | if (!tls_active) printf("%s\n", gnutls_strerror(rc)); | |
960 | } | |
c55a77db PH |
961 | #endif |
962 | ||
963 | if (!tls_active) | |
964 | { | |
965 | printf("Failed to start TLS\n"); | |
966 | fflush(stdout); | |
967 | } | |
2b4a568d JH |
968 | #ifdef HAVE_GNUTLS |
969 | else if (ocsp_stapling) | |
970 | { | |
971 | if ((rc= gnutls_certificate_verify_peers2(tls_session, &verify)) < 0) | |
972 | { | |
973 | printf("Failed to verify certificate: %s\n", gnutls_strerror(rc)); | |
974 | fflush(stdout); | |
975 | } | |
976 | else if (verify & (GNUTLS_CERT_INVALID|GNUTLS_CERT_REVOKED)) | |
977 | { | |
978 | printf("Bad certificate\n"); | |
979 | fflush(stdout); | |
980 | } | |
348051ad | 981 | #ifdef HAVE_OCSP |
2b4a568d JH |
982 | else if (gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) |
983 | { | |
984 | printf("Failed to verify certificate status\n"); | |
985 | { | |
986 | gnutls_datum_t stapling; | |
987 | gnutls_ocsp_resp_t resp; | |
988 | gnutls_datum_t printed; | |
989 | if ( (rc= gnutls_ocsp_status_request_get(tls_session, &stapling)) == 0 | |
990 | && (rc= gnutls_ocsp_resp_init(&resp)) == 0 | |
991 | && (rc= gnutls_ocsp_resp_import(resp, &stapling)) == 0 | |
992 | && (rc= gnutls_ocsp_resp_print(resp, GNUTLS_OCSP_PRINT_FULL, &printed)) == 0 | |
993 | ) | |
994 | { | |
995 | fprintf(stderr, "%.4096s", printed.data); | |
996 | gnutls_free(printed.data); | |
997 | } | |
998 | else | |
999 | (void) fprintf(stderr,"ocsp decode: %s", gnutls_strerror(rc)); | |
1000 | } | |
1001 | fflush(stdout); | |
1002 | } | |
348051ad | 1003 | #endif |
2b4a568d JH |
1004 | } |
1005 | #endif | |
c55a77db PH |
1006 | else |
1007 | printf("Succeeded in starting TLS\n"); | |
1008 | } | |
1009 | else printf("Abandoning TLS start attempt\n"); | |
1010 | } | |
1011 | sent_starttls = 0; | |
1012 | #endif | |
1013 | } | |
1014 | ||
1015 | /* Wait for a bit before proceeding */ | |
1016 | ||
a719fce4 | 1017 | else if (strncmp(CS outbuffer, "+++ ", 4) == 0) |
c55a77db PH |
1018 | { |
1019 | printf("%s\n", outbuffer); | |
a719fce4 | 1020 | sleep(atoi(CS outbuffer + 4)); |
c55a77db PH |
1021 | } |
1022 | ||
1023 | /* Send outgoing, but barf if unconsumed incoming */ | |
1024 | ||
1025 | else | |
1026 | { | |
1027 | unsigned char *escape; | |
1028 | ||
1029 | if (*inptr != 0) | |
1030 | { | |
1031 | printf("Unconsumed input: %s", inptr); | |
1032 | printf(" About to send: %s\n", outbuffer); | |
9ff403f8 | 1033 | exit(78); |
c55a77db PH |
1034 | } |
1035 | ||
1036 | #ifdef HAVE_TLS | |
1037 | ||
1038 | /* Shutdown TLS */ | |
1039 | ||
e265af1f JH |
1040 | if (strcmp(CS outbuffer, "stoptls") == 0 || |
1041 | strcmp(CS outbuffer, "STOPTLS") == 0) | |
c55a77db PH |
1042 | { |
1043 | if (!tls_active) | |
1044 | { | |
1045 | printf("STOPTLS read when TLS not active\n"); | |
9ff403f8 | 1046 | exit(77); |
c55a77db PH |
1047 | } |
1048 | printf("Shutting down TLS encryption\n"); | |
1049 | ||
1050 | #ifdef HAVE_OPENSSL | |
1051 | SSL_shutdown(ssl); | |
1052 | SSL_free(ssl); | |
1053 | #endif | |
1054 | ||
1055 | #ifdef HAVE_GNUTLS | |
1056 | gnutls_bye(tls_session, GNUTLS_SHUT_WR); | |
1057 | gnutls_deinit(tls_session); | |
1058 | tls_session = NULL; | |
1059 | gnutls_global_deinit(); | |
1060 | #endif | |
1061 | ||
1062 | tls_active = 0; | |
1063 | continue; | |
1064 | } | |
1065 | ||
1066 | /* Remember that we sent STARTTLS */ | |
1067 | ||
e265af1f JH |
1068 | sent_starttls = (strcmp(CS outbuffer, "starttls") == 0 || |
1069 | strcmp(CS outbuffer, "STARTTLS") == 0); | |
c55a77db PH |
1070 | |
1071 | /* Fudge: if the command is "starttls_wait", we send the starttls bit, | |
1072 | but we haven't set the flag, so that there is no negotiation. This is for | |
1073 | testing the server's timeout. */ | |
1074 | ||
e265af1f | 1075 | if (strcmp(CS outbuffer, "starttls_wait") == 0) |
c55a77db PH |
1076 | { |
1077 | outbuffer[8] = 0; | |
1078 | n = 8; | |
1079 | } | |
1080 | #endif | |
1081 | ||
1082 | printf(">>> %s\n", outbuffer); | |
a719fce4 | 1083 | strcpy(CS outbuffer + n, "\r\n"); |
c55a77db PH |
1084 | |
1085 | /* Turn "\n" and "\r" into the relevant characters. This is a hack. */ | |
1086 | ||
a719fce4 | 1087 | while ((escape = US strstr(CS outbuffer, "\\r")) != NULL) |
c55a77db PH |
1088 | { |
1089 | *escape = '\r'; | |
1090 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
1091 | n--; | |
1092 | } | |
1093 | ||
e265af1f | 1094 | while ((escape = US strstr(CS outbuffer, "\\n")) != NULL) |
c55a77db PH |
1095 | { |
1096 | *escape = '\n'; | |
1097 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
1098 | n--; | |
1099 | } | |
1100 | ||
1101 | /* OK, do it */ | |
1102 | ||
1103 | alarm(timeout); | |
1104 | if (tls_active) | |
1105 | { | |
1106 | #ifdef HAVE_OPENSSL | |
1107 | rc = SSL_write (ssl, outbuffer, n + 2); | |
1108 | #endif | |
1109 | #ifdef HAVE_GNUTLS | |
1110 | rc = gnutls_record_send(tls_session, CS outbuffer, n + 2); | |
1111 | if (rc < 0) | |
1112 | { | |
1113 | printf("GnuTLS write error: %s\n", gnutls_strerror(rc)); | |
9ff403f8 | 1114 | exit(76); |
c55a77db PH |
1115 | } |
1116 | #endif | |
1117 | } | |
1118 | else | |
1119 | { | |
1120 | rc = write(sock, outbuffer, n + 2); | |
1121 | } | |
1122 | alarm(0); | |
1123 | ||
1124 | if (rc < 0) | |
1125 | { | |
1126 | printf("Write error: %s\n", strerror(errno)); | |
9ff403f8 | 1127 | exit(75); |
c55a77db PH |
1128 | } |
1129 | } | |
1130 | } | |
1131 | ||
1132 | printf("End of script\n"); | |
60d10ce7 JH |
1133 | shutdown(sock, SHUT_WR); |
1134 | while ((rc = read(sock, inbuffer, sizeof(inbuffer))) > 0) ; | |
c55a77db PH |
1135 | close(sock); |
1136 | ||
1137 | exit(0); | |
1138 | } | |
1139 | ||
1140 | /* End of client.c */ |