Commit | Line | Data |
---|---|---|
c55a77db PH |
1 | /* $Cambridge: exim/test/src/client.c,v 1.1 2006/02/06 16:24:05 ph10 Exp $ */ |
2 | ||
3 | /* A little hacked up program that makes a TCP/IP call and reads a script to | |
4 | drive it, for testing Exim server code running as a daemon. It's got a bit | |
5 | messy with the addition of support for either OpenSSL or GnuTLS. The code for | |
6 | those was hacked out of Exim itself. */ | |
7 | ||
8 | /* ANSI C standard includes */ | |
9 | ||
10 | #include <ctype.h> | |
11 | #include <signal.h> | |
12 | #include <stdarg.h> | |
13 | #include <stddef.h> | |
14 | #include <stdio.h> | |
15 | #include <stdlib.h> | |
16 | #include <string.h> | |
17 | #include <time.h> | |
18 | ||
19 | /* Unix includes */ | |
20 | ||
21 | #include <errno.h> | |
22 | #include <dirent.h> | |
23 | #include <sys/types.h> | |
24 | ||
25 | #include <netinet/in_systm.h> | |
26 | #include <netinet/in.h> | |
27 | #include <netinet/ip.h> | |
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. */ | |
62 | ||
63 | #ifdef HAVE_OPENSSL | |
64 | #define HAVE_TLS | |
65 | #include <openssl/crypto.h> | |
66 | #include <openssl/x509.h> | |
67 | #include <openssl/pem.h> | |
68 | #include <openssl/ssl.h> | |
69 | #include <openssl/err.h> | |
70 | #include <openssl/rand.h> | |
71 | #endif | |
72 | ||
73 | ||
74 | #ifdef HAVE_GNUTLS | |
75 | #define HAVE_TLS | |
76 | #include <gnutls/gnutls.h> | |
77 | #include <gnutls/x509.h> | |
78 | ||
79 | #define DH_BITS 768 | |
80 | #define RSA_BITS 512 | |
81 | ||
82 | /* Local static variables for GNUTLS */ | |
83 | ||
84 | static gnutls_rsa_params rsa_params = NULL; | |
85 | static gnutls_dh_params dh_params = NULL; | |
86 | ||
87 | static gnutls_certificate_credentials_t x509_cred = NULL; | |
88 | static gnutls_session tls_session = NULL; | |
89 | ||
90 | static int ssl_session_timeout = 200; | |
91 | ||
92 | /* Priorities for TLS algorithms to use. */ | |
93 | ||
94 | static const int protocol_priority[16] = { GNUTLS_TLS1, GNUTLS_SSL3, 0 }; | |
95 | ||
96 | static const int kx_priority[16] = { | |
97 | GNUTLS_KX_RSA, | |
98 | GNUTLS_KX_DHE_DSS, | |
99 | GNUTLS_KX_DHE_RSA, | |
100 | GNUTLS_KX_RSA_EXPORT, | |
101 | 0 }; | |
102 | ||
103 | static int default_cipher_priority[16] = { | |
104 | GNUTLS_CIPHER_AES_256_CBC, | |
105 | GNUTLS_CIPHER_AES_128_CBC, | |
106 | GNUTLS_CIPHER_3DES_CBC, | |
107 | GNUTLS_CIPHER_ARCFOUR_128, | |
108 | 0 }; | |
109 | ||
110 | static const int mac_priority[16] = { | |
111 | GNUTLS_MAC_SHA, | |
112 | GNUTLS_MAC_MD5, | |
113 | 0 }; | |
114 | ||
115 | static const int comp_priority[16] = { GNUTLS_COMP_NULL, 0 }; | |
116 | static const int cert_type_priority[16] = { GNUTLS_CRT_X509, 0 }; | |
117 | ||
118 | #endif | |
119 | ||
120 | ||
121 | ||
122 | ||
123 | /************************************************* | |
124 | * SIGALRM handler - crash out * | |
125 | *************************************************/ | |
126 | ||
127 | static void | |
128 | sigalrm_handler_crash(int sig) | |
129 | { | |
130 | sig = sig; /* Keep picky compilers happy */ | |
131 | printf("\nClient timed out\n"); | |
132 | exit(99); | |
133 | } | |
134 | ||
135 | ||
136 | /************************************************* | |
137 | * SIGALRM handler - set flag * | |
138 | *************************************************/ | |
139 | ||
140 | static void | |
141 | sigalrm_handler_flag(int sig) | |
142 | { | |
143 | sig = sig; /* Keep picky compilers happy */ | |
144 | sigalrm_seen = 1; | |
145 | } | |
146 | ||
147 | ||
148 | ||
149 | /****************************************************************************/ | |
150 | /****************************************************************************/ | |
151 | ||
152 | #ifdef HAVE_OPENSSL | |
153 | /************************************************* | |
154 | * Start an OpenSSL TLS session * | |
155 | *************************************************/ | |
156 | ||
157 | int tls_start(int sock, SSL **ssl, SSL_CTX *ctx) | |
158 | { | |
159 | int rc; | |
160 | static const char *sid_ctx = "exim"; | |
161 | ||
162 | RAND_load_file("client.c", -1); /* Not *very* random! */ | |
163 | ||
164 | *ssl = SSL_new (ctx); | |
165 | SSL_set_session_id_context(*ssl, sid_ctx, strlen(sid_ctx)); | |
166 | SSL_set_fd (*ssl, sock); | |
167 | SSL_set_connect_state(*ssl); | |
168 | ||
169 | signal(SIGALRM, sigalrm_handler_flag); | |
170 | sigalrm_seen = 0; | |
171 | alarm(5); | |
172 | rc = SSL_connect (*ssl); | |
173 | alarm(0); | |
174 | ||
175 | if (sigalrm_seen) | |
176 | { | |
177 | printf("SSL_connect timed out\n"); | |
178 | return 0; | |
179 | } | |
180 | ||
181 | if (rc <= 0) | |
182 | { | |
183 | ERR_print_errors_fp(stdout); | |
184 | return 0; | |
185 | } | |
186 | ||
187 | printf("SSL connection using %s\n", SSL_get_cipher (*ssl)); | |
188 | return 1; | |
189 | } | |
190 | ||
191 | ||
192 | /************************************************* | |
193 | * SSL Information callback * | |
194 | *************************************************/ | |
195 | ||
196 | static void | |
197 | info_callback(SSL *s, int where, int ret) | |
198 | { | |
199 | where = where; | |
200 | ret = ret; | |
201 | printf("SSL info: %s\n", SSL_state_string_long(s)); | |
202 | } | |
203 | #endif | |
204 | ||
205 | ||
206 | /****************************************************************************/ | |
207 | /****************************************************************************/ | |
208 | ||
209 | ||
210 | #ifdef HAVE_GNUTLS | |
211 | /************************************************* | |
212 | * Handle GnuTLS error * | |
213 | *************************************************/ | |
214 | ||
215 | /* Called from lots of places when errors occur before actually starting to do | |
216 | the TLS handshake, that is, while the session is still in clear. | |
217 | ||
218 | Argument: | |
219 | prefix prefix text | |
220 | err a GnuTLS error number, or 0 if local error | |
221 | ||
222 | Returns: doesn't - it dies | |
223 | */ | |
224 | ||
225 | static void | |
226 | gnutls_error(uschar *prefix, int err) | |
227 | { | |
228 | fprintf(stderr, "GnuTLS connection error:%s", prefix); | |
229 | if (err != 0) fprintf(stderr, " %s", gnutls_strerror(err)); | |
230 | fprintf(stderr, "\n"); | |
231 | exit(1); | |
232 | } | |
233 | ||
234 | ||
235 | ||
236 | /************************************************* | |
237 | * Setup up RSA and DH parameters * | |
238 | *************************************************/ | |
239 | ||
240 | /* For the test suite, the parameters should always be available in the spool | |
241 | directory. */ | |
242 | ||
243 | static void | |
244 | init_rsa_dh(void) | |
245 | { | |
246 | int fd; | |
247 | int ret; | |
248 | gnutls_datum m; | |
249 | uschar filename[200]; | |
250 | struct stat statbuf; | |
251 | ||
252 | /* Initialize the data structures for holding the parameters */ | |
253 | ||
254 | ret = gnutls_rsa_params_init(&rsa_params); | |
255 | if (ret < 0) gnutls_error(US"init rsa_params", ret); | |
256 | ||
257 | ret = gnutls_dh_params_init(&dh_params); | |
258 | if (ret < 0) gnutls_error(US"init dh_params", ret); | |
259 | ||
260 | /* Open the cache file for reading and if successful, read it and set up the | |
261 | parameters. If we can't set up the RSA parameters, assume that we are dealing | |
262 | with an old-style cache file that is in another format, and fall through to | |
263 | compute new values. However, if we correctly get RSA parameters, a failure to | |
264 | set up D-H parameters is treated as an error. */ | |
265 | ||
266 | fd = open("aux-fixed/gnutls-params", O_RDONLY, 0); | |
267 | if (fd < 0) | |
268 | { | |
269 | fprintf(stderr, "Failed to open spool/gnutls-params: %s\n", strerror(errno)); | |
270 | exit(1); | |
271 | } | |
272 | ||
273 | if (fstat(fd, &statbuf) < 0) | |
274 | { | |
275 | (void)close(fd); | |
276 | return gnutls_error(US"TLS cache stat failed", 0); | |
277 | } | |
278 | ||
279 | m.size = statbuf.st_size; | |
280 | m.data = malloc(m.size); | |
281 | if (m.data == NULL) | |
282 | return gnutls_error(US"memory allocation failed", 0); | |
283 | if (read(fd, m.data, m.size) != m.size) | |
284 | return gnutls_error(US"TLS cache read failed", 0); | |
285 | (void)close(fd); | |
286 | ||
287 | ret = gnutls_rsa_params_import_pkcs1(rsa_params, &m, GNUTLS_X509_FMT_PEM); | |
288 | if (ret < 0) return gnutls_error(US"RSA params import", ret); | |
289 | ret = gnutls_dh_params_import_pkcs3(dh_params, &m, GNUTLS_X509_FMT_PEM); | |
290 | if (ret < 0) return gnutls_error(US"DH params import", ret); | |
291 | free(m.data); | |
292 | } | |
293 | ||
294 | ||
295 | ||
296 | ||
297 | /************************************************* | |
298 | * Initialize for GnuTLS * | |
299 | *************************************************/ | |
300 | ||
301 | /* | |
302 | Arguments: | |
303 | certificate certificate file | |
304 | privatekey private key file | |
305 | */ | |
306 | ||
307 | static void | |
308 | tls_init(uschar *certificate, uschar *privatekey) | |
309 | { | |
310 | int rc; | |
311 | ||
312 | rc = gnutls_global_init(); | |
313 | if (rc < 0) gnutls_error(US"gnutls_global_init", rc); | |
314 | ||
315 | /* Read RSA and D-H parameters from the cache file. */ | |
316 | ||
317 | init_rsa_dh(); | |
318 | ||
319 | /* Create the credentials structure */ | |
320 | ||
321 | rc = gnutls_certificate_allocate_credentials(&x509_cred); | |
322 | if (rc < 0) gnutls_error(US"certificate_allocate_credentials", rc); | |
323 | ||
324 | /* Set the certificate and private keys */ | |
325 | ||
326 | if (certificate != NULL) | |
327 | { | |
328 | rc = gnutls_certificate_set_x509_key_file(x509_cred, CS certificate, | |
329 | CS privatekey, GNUTLS_X509_FMT_PEM); | |
330 | if (rc < 0) gnutls_error("gnutls_certificate", rc); | |
331 | } | |
332 | ||
333 | /* Associate the parameters with the x509 credentials structure. */ | |
334 | ||
335 | gnutls_certificate_set_dh_params(x509_cred, dh_params); | |
336 | gnutls_certificate_set_rsa_export_params(x509_cred, rsa_params); | |
337 | } | |
338 | ||
339 | ||
340 | ||
341 | /************************************************* | |
342 | * Initialize a single GNUTLS session * | |
343 | *************************************************/ | |
344 | ||
345 | static gnutls_session | |
346 | tls_session_init(void) | |
347 | { | |
348 | gnutls_session session; | |
349 | ||
350 | gnutls_init(&session, GNUTLS_CLIENT); | |
351 | ||
352 | gnutls_cipher_set_priority(session, default_cipher_priority); | |
353 | gnutls_compression_set_priority(session, comp_priority); | |
354 | gnutls_kx_set_priority(session, kx_priority); | |
355 | gnutls_protocol_set_priority(session, protocol_priority); | |
356 | gnutls_mac_set_priority(session, mac_priority); | |
357 | ||
358 | gnutls_cred_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); | |
359 | ||
360 | gnutls_dh_set_prime_bits(session, DH_BITS); | |
361 | gnutls_db_set_cache_expiration(session, ssl_session_timeout); | |
362 | ||
363 | return session; | |
364 | } | |
365 | #endif | |
366 | ||
367 | ||
368 | /****************************************************************************/ | |
369 | /****************************************************************************/ | |
370 | ||
371 | ||
372 | ||
373 | ||
374 | /************************************************* | |
375 | * Main Program * | |
376 | *************************************************/ | |
377 | ||
378 | /* Usage: client | |
379 | <IP address> | |
380 | <port> | |
381 | [<outgoing interface>] | |
382 | [<cert file>] | |
383 | [<key file>] | |
384 | */ | |
385 | ||
386 | int main(int argc, char **argv) | |
387 | { | |
388 | struct sockaddr *s_ptr; | |
389 | struct sockaddr_in s_in4; | |
390 | char *interface = NULL; | |
391 | char *address = NULL; | |
392 | char *certfile = NULL; | |
393 | char *keyfile = NULL; | |
394 | int argi = 1; | |
395 | int host_af, port, s_len, rc, sock, save_errno; | |
396 | int timeout = 1; | |
397 | int tls_active = 0; | |
398 | int sent_starttls = 0; | |
399 | int tls_on_connect = 0; | |
400 | ||
401 | #if HAVE_IPV6 | |
402 | struct sockaddr_in6 s_in6; | |
403 | #endif | |
404 | ||
405 | #ifdef HAVE_OPENSSL | |
406 | SSL_CTX* ctx; | |
407 | SSL* ssl; | |
408 | #endif | |
409 | ||
410 | unsigned char outbuffer[10240]; | |
411 | unsigned char inbuffer[10240]; | |
412 | unsigned char *inptr = inbuffer; | |
413 | ||
414 | *inptr = 0; /* Buffer empty */ | |
415 | ||
416 | /* Options */ | |
417 | ||
418 | while (argc >= argi + 1 && argv[argi][0] == '-') | |
419 | { | |
420 | if (strcmp(argv[argi], "-tls-on-connect") == 0) | |
421 | { | |
422 | tls_on_connect = 1; | |
423 | argi++; | |
424 | } | |
425 | else if (argv[argi][1] == 't' && isdigit(argv[argi][2])) | |
426 | { | |
427 | timeout = atoi(argv[argi]+1); | |
428 | argi++; | |
429 | } | |
430 | else | |
431 | { | |
432 | printf("Unrecognized option %s\n", argv[argi]); | |
433 | exit(1); | |
434 | } | |
435 | } | |
436 | ||
437 | /* Mandatory 1st arg is IP address */ | |
438 | ||
439 | if (argc < argi+1) | |
440 | { | |
441 | printf("No IP address given\n"); | |
442 | exit(1); | |
443 | } | |
444 | ||
445 | address = argv[argi++]; | |
446 | host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET; | |
447 | ||
448 | /* Mandatory 2nd arg is port */ | |
449 | ||
450 | if (argc < argi+1) | |
451 | { | |
452 | printf("No port number given\n"); | |
453 | exit(1); | |
454 | } | |
455 | ||
456 | port = atoi(argv[argi++]); | |
457 | ||
458 | /* Optional next arg is interface */ | |
459 | ||
460 | if (argc > argi && | |
461 | (isdigit((unsigned char)argv[argi][0]) || argv[argi][0] == ':')) | |
462 | interface = argv[argi++]; | |
463 | ||
464 | /* Any more arguments are the name of a certificate file and key file */ | |
465 | ||
466 | if (argc > argi) certfile = argv[argi++]; | |
467 | if (argc > argi) keyfile = argv[argi++]; | |
468 | ||
469 | ||
470 | #if HAVE_IPV6 | |
471 | /* For an IPv6 address, use an IPv6 sockaddr structure. */ | |
472 | ||
473 | if (host_af == AF_INET6) | |
474 | { | |
475 | s_ptr = (struct sockaddr *)&s_in6; | |
476 | s_len = sizeof(s_in6); | |
477 | } | |
478 | else | |
479 | #endif | |
480 | ||
481 | /* For an IPv4 address, use an IPv4 sockaddr structure, | |
482 | even on an IPv6 system. */ | |
483 | ||
484 | { | |
485 | s_ptr = (struct sockaddr *)&s_in4; | |
486 | s_len = sizeof(s_in4); | |
487 | } | |
488 | ||
489 | printf("Connecting to %s port %d ... ", address, port); | |
490 | ||
491 | sock = socket(host_af, SOCK_STREAM, 0); | |
492 | if (sock < 0) | |
493 | { | |
494 | printf("socket creation failed: %s\n", strerror(errno)); | |
495 | exit(1); | |
496 | } | |
497 | ||
498 | /* Bind to a specific interface if requested. On an IPv6 system, this has | |
499 | to be of the same family as the address we are calling. On an IPv4 system the | |
500 | test is redundant, but it keeps the code tidier. */ | |
501 | ||
502 | if (interface != NULL) | |
503 | { | |
504 | int interface_af = (strchr(interface, ':') != NULL)? AF_INET6 : AF_INET; | |
505 | ||
506 | if (interface_af == host_af) | |
507 | { | |
508 | #if HAVE_IPV6 | |
509 | ||
510 | /* Set up for IPv6 binding */ | |
511 | ||
512 | if (host_af == AF_INET6) | |
513 | { | |
514 | memset(&s_in6, 0, sizeof(s_in6)); | |
515 | s_in6.sin6_family = AF_INET6; | |
516 | s_in6.sin6_port = 0; | |
517 | if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1) | |
518 | { | |
519 | printf("Unable to parse \"%s\"", interface); | |
520 | exit(1); | |
521 | } | |
522 | } | |
523 | else | |
524 | #endif | |
525 | ||
526 | /* Set up for IPv4 binding */ | |
527 | ||
528 | { | |
529 | memset(&s_in4, 0, sizeof(s_in4)); | |
530 | s_in4.sin_family = AF_INET; | |
531 | s_in4.sin_port = 0; | |
532 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(interface); | |
533 | } | |
534 | ||
535 | /* Bind */ | |
536 | ||
537 | if (bind(sock, s_ptr, s_len) < 0) | |
538 | { | |
539 | printf("Unable to bind outgoing SMTP call to %s: %s", | |
540 | interface, strerror(errno)); | |
541 | exit(1); | |
542 | } | |
543 | } | |
544 | } | |
545 | ||
546 | /* Set up a remote IPv6 address */ | |
547 | ||
548 | #if HAVE_IPV6 | |
549 | if (host_af == AF_INET6) | |
550 | { | |
551 | memset(&s_in6, 0, sizeof(s_in6)); | |
552 | s_in6.sin6_family = AF_INET6; | |
553 | s_in6.sin6_port = htons(port); | |
554 | if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1) | |
555 | { | |
556 | printf("Unable to parse \"%s\"", address); | |
557 | exit(1); | |
558 | } | |
559 | } | |
560 | else | |
561 | #endif | |
562 | ||
563 | /* Set up a remote IPv4 address */ | |
564 | ||
565 | { | |
566 | memset(&s_in4, 0, sizeof(s_in4)); | |
567 | s_in4.sin_family = AF_INET; | |
568 | s_in4.sin_port = htons(port); | |
569 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(address); | |
570 | } | |
571 | ||
572 | /* SIGALRM handler crashes out */ | |
573 | ||
574 | signal(SIGALRM, sigalrm_handler_crash); | |
575 | alarm(timeout); | |
576 | rc = connect(sock, s_ptr, s_len); | |
577 | save_errno = errno; | |
578 | alarm(0); | |
579 | ||
580 | /* A failure whose error code is "Interrupted system call" is in fact | |
581 | an externally applied timeout if the signal handler has been run. */ | |
582 | ||
583 | if (rc < 0) | |
584 | { | |
585 | close(sock); | |
586 | printf("failed: %s\n", strerror(save_errno)); | |
587 | exit(1); | |
588 | } | |
589 | ||
590 | printf("connected\n"); | |
591 | ||
592 | ||
593 | /* --------------- Set up for OpenSSL --------------- */ | |
594 | ||
595 | #ifdef HAVE_OPENSSL | |
596 | SSL_library_init(); | |
597 | SSL_load_error_strings(); | |
598 | ||
599 | ctx = SSL_CTX_new(SSLv23_method()); | |
600 | if (ctx == NULL) | |
601 | { | |
602 | printf ("SSL_CTX_new failed\n"); | |
603 | exit(1); | |
604 | } | |
605 | ||
606 | if (certfile != NULL) | |
607 | { | |
608 | if (!SSL_CTX_use_certificate_file(ctx, certfile, SSL_FILETYPE_PEM)) | |
609 | { | |
610 | printf("SSL_CTX_use_certificate_file failed\n"); | |
611 | exit(1); | |
612 | } | |
613 | printf("Certificate file = %s\n", certfile); | |
614 | } | |
615 | ||
616 | if (keyfile != NULL) | |
617 | { | |
618 | if (!SSL_CTX_use_PrivateKey_file(ctx, keyfile, SSL_FILETYPE_PEM)) | |
619 | { | |
620 | printf("SSL_CTX_use_PrivateKey_file failed\n"); | |
621 | exit(1); | |
622 | } | |
623 | printf("Key file = %s\n", keyfile); | |
624 | } | |
625 | ||
626 | SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_BOTH); | |
627 | SSL_CTX_set_timeout(ctx, 200); | |
628 | SSL_CTX_set_info_callback(ctx, (void (*)())info_callback); | |
629 | #endif | |
630 | ||
631 | ||
632 | /* --------------- Set up for GnuTLS --------------- */ | |
633 | ||
634 | #ifdef HAVE_GNUTLS | |
635 | if (certfile != NULL) printf("Certificate file = %s\n", certfile); | |
636 | if (keyfile != NULL) printf("Key file = %s\n", keyfile); | |
637 | tls_init(certfile, keyfile); | |
638 | tls_session = tls_session_init(); | |
639 | gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr)sock); | |
640 | ||
641 | /* When the server asks for a certificate and the client does not have one, | |
642 | there is a SIGPIPE error in the gnutls_handshake() function for some reason | |
643 | that is not understood. As luck would have it, this has never hit Exim itself | |
644 | because it ignores SIGPIPE errors. Doing the same here allows it all to work as | |
645 | one wants. */ | |
646 | ||
647 | signal(SIGPIPE, SIG_IGN); | |
648 | #endif | |
649 | ||
650 | /* ---------------------------------------------- */ | |
651 | ||
652 | ||
653 | /* Start TLS session if configured to do so without STARTTLS */ | |
654 | ||
655 | #ifdef HAVE_TLS | |
656 | if (tls_on_connect) | |
657 | { | |
658 | printf("Attempting to start TLS\n"); | |
659 | ||
660 | #ifdef HAVE_OPENSSL | |
661 | tls_active = tls_start(sock, &ssl, ctx); | |
662 | #endif | |
663 | ||
664 | #ifdef HAVE_GNUTLS | |
665 | sigalrm_seen = FALSE; | |
666 | alarm(timeout); | |
667 | tls_active = gnutls_handshake(tls_session) >= 0; | |
668 | alarm(0); | |
669 | #endif | |
670 | ||
671 | if (!tls_active) | |
672 | printf("Failed to start TLS\n"); | |
673 | else | |
674 | printf("Succeeded in starting TLS\n"); | |
675 | } | |
676 | #endif | |
677 | ||
678 | while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL) | |
679 | { | |
680 | int n = (int)strlen(outbuffer); | |
681 | while (n > 0 && isspace(outbuffer[n-1])) n--; | |
682 | outbuffer[n] = 0; | |
683 | ||
684 | /* Expect incoming */ | |
685 | ||
686 | if (strncmp(outbuffer, "??? ", 4) == 0) | |
687 | { | |
688 | unsigned char *lineptr; | |
689 | printf("%s\n", outbuffer); | |
690 | ||
691 | if (*inptr == 0) /* Refill input buffer */ | |
692 | { | |
693 | if (tls_active) | |
694 | { | |
695 | #ifdef HAVE_OPENSSL | |
696 | rc = SSL_read (ssl, inbuffer, sizeof(inbuffer) - 1); | |
697 | #endif | |
698 | #ifdef HAVE_GNUTLS | |
699 | rc = gnutls_record_recv(tls_session, CS inbuffer, sizeof(inbuffer) - 1); | |
700 | #endif | |
701 | } | |
702 | else | |
703 | { | |
704 | alarm(timeout); | |
705 | rc = read(sock, inbuffer, sizeof(inbuffer)); | |
706 | alarm(0); | |
707 | } | |
708 | ||
709 | if (rc < 0) | |
710 | { | |
711 | printf("Read error %s\n", strerror(errno)); | |
712 | exit(1) ; | |
713 | } | |
714 | else if (rc == 0) | |
715 | { | |
716 | printf("Unexpected EOF read\n"); | |
717 | close(sock); | |
718 | exit(1); | |
719 | } | |
720 | else | |
721 | { | |
722 | inbuffer[rc] = 0; | |
723 | inptr = inbuffer; | |
724 | } | |
725 | } | |
726 | ||
727 | lineptr = inptr; | |
728 | while (*inptr != 0 && *inptr != '\r' && *inptr != '\n') inptr++; | |
729 | if (*inptr != 0) | |
730 | { | |
731 | *inptr++ = 0; | |
732 | if (*inptr == '\n') inptr++; | |
733 | } | |
734 | ||
735 | printf("<<< %s\n", lineptr); | |
736 | if (strncmp(lineptr, outbuffer + 4, (int)strlen(outbuffer) - 4) != 0) | |
737 | { | |
738 | printf("\n******** Input mismatch ********\n"); | |
739 | exit(1); | |
740 | } | |
741 | ||
742 | #ifdef HAVE_TLS | |
743 | if (sent_starttls) | |
744 | { | |
745 | if (lineptr[0] == '2') | |
746 | { | |
747 | printf("Attempting to start TLS\n"); | |
748 | fflush(stdout); | |
749 | ||
750 | #ifdef HAVE_OPENSSL | |
751 | tls_active = tls_start(sock, &ssl, ctx); | |
752 | #endif | |
753 | ||
754 | #ifdef HAVE_GNUTLS | |
755 | sigalrm_seen = FALSE; | |
756 | alarm(timeout); | |
757 | tls_active = gnutls_handshake(tls_session) >= 0; | |
758 | alarm(0); | |
759 | #endif | |
760 | ||
761 | if (!tls_active) | |
762 | { | |
763 | printf("Failed to start TLS\n"); | |
764 | fflush(stdout); | |
765 | } | |
766 | else | |
767 | printf("Succeeded in starting TLS\n"); | |
768 | } | |
769 | else printf("Abandoning TLS start attempt\n"); | |
770 | } | |
771 | sent_starttls = 0; | |
772 | #endif | |
773 | } | |
774 | ||
775 | /* Wait for a bit before proceeding */ | |
776 | ||
777 | else if (strncmp(outbuffer, "+++ ", 4) == 0) | |
778 | { | |
779 | printf("%s\n", outbuffer); | |
780 | sleep(atoi(outbuffer + 4)); | |
781 | } | |
782 | ||
783 | /* Send outgoing, but barf if unconsumed incoming */ | |
784 | ||
785 | else | |
786 | { | |
787 | unsigned char *escape; | |
788 | ||
789 | if (*inptr != 0) | |
790 | { | |
791 | printf("Unconsumed input: %s", inptr); | |
792 | printf(" About to send: %s\n", outbuffer); | |
793 | exit(1); | |
794 | } | |
795 | ||
796 | #ifdef HAVE_TLS | |
797 | ||
798 | /* Shutdown TLS */ | |
799 | ||
800 | if (strcmp(outbuffer, "stoptls") == 0 || | |
801 | strcmp(outbuffer, "STOPTLS") == 0) | |
802 | { | |
803 | if (!tls_active) | |
804 | { | |
805 | printf("STOPTLS read when TLS not active\n"); | |
806 | exit(1); | |
807 | } | |
808 | printf("Shutting down TLS encryption\n"); | |
809 | ||
810 | #ifdef HAVE_OPENSSL | |
811 | SSL_shutdown(ssl); | |
812 | SSL_free(ssl); | |
813 | #endif | |
814 | ||
815 | #ifdef HAVE_GNUTLS | |
816 | gnutls_bye(tls_session, GNUTLS_SHUT_WR); | |
817 | gnutls_deinit(tls_session); | |
818 | tls_session = NULL; | |
819 | gnutls_global_deinit(); | |
820 | #endif | |
821 | ||
822 | tls_active = 0; | |
823 | continue; | |
824 | } | |
825 | ||
826 | /* Remember that we sent STARTTLS */ | |
827 | ||
828 | sent_starttls = (strcmp(outbuffer, "starttls") == 0 || | |
829 | strcmp(outbuffer, "STARTTLS") == 0); | |
830 | ||
831 | /* Fudge: if the command is "starttls_wait", we send the starttls bit, | |
832 | but we haven't set the flag, so that there is no negotiation. This is for | |
833 | testing the server's timeout. */ | |
834 | ||
835 | if (strcmp(outbuffer, "starttls_wait") == 0) | |
836 | { | |
837 | outbuffer[8] = 0; | |
838 | n = 8; | |
839 | } | |
840 | #endif | |
841 | ||
842 | printf(">>> %s\n", outbuffer); | |
843 | strcpy(outbuffer + n, "\r\n"); | |
844 | ||
845 | /* Turn "\n" and "\r" into the relevant characters. This is a hack. */ | |
846 | ||
847 | while ((escape = strstr(outbuffer, "\\r")) != NULL) | |
848 | { | |
849 | *escape = '\r'; | |
850 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
851 | n--; | |
852 | } | |
853 | ||
854 | while ((escape = strstr(outbuffer, "\\n")) != NULL) | |
855 | { | |
856 | *escape = '\n'; | |
857 | memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); | |
858 | n--; | |
859 | } | |
860 | ||
861 | /* OK, do it */ | |
862 | ||
863 | alarm(timeout); | |
864 | if (tls_active) | |
865 | { | |
866 | #ifdef HAVE_OPENSSL | |
867 | rc = SSL_write (ssl, outbuffer, n + 2); | |
868 | #endif | |
869 | #ifdef HAVE_GNUTLS | |
870 | rc = gnutls_record_send(tls_session, CS outbuffer, n + 2); | |
871 | if (rc < 0) | |
872 | { | |
873 | printf("GnuTLS write error: %s\n", gnutls_strerror(rc)); | |
874 | exit(1); | |
875 | } | |
876 | #endif | |
877 | } | |
878 | else | |
879 | { | |
880 | rc = write(sock, outbuffer, n + 2); | |
881 | } | |
882 | alarm(0); | |
883 | ||
884 | if (rc < 0) | |
885 | { | |
886 | printf("Write error: %s\n", strerror(errno)); | |
887 | exit(1); | |
888 | } | |
889 | } | |
890 | } | |
891 | ||
892 | printf("End of script\n"); | |
893 | close(sock); | |
894 | ||
895 | exit(0); | |
896 | } | |
897 | ||
898 | /* End of client.c */ |