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 | ||
ba86e143 | 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 }; | |
ba86e143 | 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; | |
ba86e143 | 136 | char * pri_string = NULL; |
2b4a568d JH |
137 | #endif |
138 | ||
c55a77db PH |
139 | |
140 | /************************************************* | |
141 | * SIGALRM handler - crash out * | |
142 | *************************************************/ | |
143 | ||
144 | static void | |
145 | sigalrm_handler_crash(int sig) | |
146 | { | |
147 | sig = sig; /* Keep picky compilers happy */ | |
148 | printf("\nClient timed out\n"); | |
149 | exit(99); | |
150 | } | |
151 | ||
152 | ||
153 | /************************************************* | |
154 | * SIGALRM handler - set flag * | |
155 | *************************************************/ | |
156 | ||
157 | static void | |
158 | sigalrm_handler_flag(int sig) | |
159 | { | |
160 | sig = sig; /* Keep picky compilers happy */ | |
161 | sigalrm_seen = 1; | |
162 | } | |
163 | ||
164 | ||
165 | ||
166 | /****************************************************************************/ | |
167 | /****************************************************************************/ | |
168 | ||
169 | #ifdef HAVE_OPENSSL | |
3b3634d0 | 170 | # ifndef DISABLE_OCSP |
f5d78688 | 171 | |
ee5b1e28 | 172 | static STACK_OF(X509) * |
3b3634d0 | 173 | chain_from_pem_file(const uschar * file) |
ee5b1e28 | 174 | { |
3b3634d0 JH |
175 | BIO * bp; |
176 | X509 * x; | |
177 | STACK_OF(X509) * sk; | |
ee5b1e28 | 178 | |
3b3634d0 JH |
179 | if (!(sk = sk_X509_new_null())) return NULL; |
180 | if (!(bp = BIO_new_file(CS file, "r"))) return NULL; | |
181 | while ((x = PEM_read_bio_X509(bp, NULL, 0, NULL))) | |
182 | sk_X509_push(sk, x); | |
183 | BIO_free(bp); | |
ee5b1e28 JH |
184 | return sk; |
185 | } | |
186 | ||
3b3634d0 JH |
187 | |
188 | ||
ee5b1e28 JH |
189 | static void |
190 | cert_stack_free(STACK_OF(X509) * sk) | |
191 | { | |
192 | while (sk_X509_num(sk) > 0) (void) sk_X509_pop(sk); | |
193 | sk_X509_free(sk); | |
194 | } | |
195 | ||
196 | ||
f5d78688 JH |
197 | static int |
198 | tls_client_stapling_cb(SSL *s, void *arg) | |
199 | { | |
200 | const unsigned char *p; | |
201 | int len; | |
202 | OCSP_RESPONSE *rsp; | |
203 | OCSP_BASICRESP *bs; | |
ee5b1e28 | 204 | STACK_OF(X509) * sk; |
f5d78688 JH |
205 | int ret = 1; |
206 | ||
207 | len = SSL_get_tlsext_status_ocsp_resp(s, &p); | |
208 | /*BIO_printf(arg, "OCSP response: ");*/ | |
209 | if (!p) | |
210 | { | |
211 | BIO_printf(arg, "no response received\n"); | |
212 | return 1; | |
213 | } | |
214 | if(!(rsp = d2i_OCSP_RESPONSE(NULL, &p, len))) | |
215 | { | |
216 | BIO_printf(arg, "response parse error\n"); | |
217 | BIO_dump_indent(arg, (char *)p, len, 4); | |
218 | return 0; | |
219 | } | |
220 | if(!(bs = OCSP_response_get1_basic(rsp))) | |
221 | { | |
222 | BIO_printf(arg, "error parsing response\n"); | |
223 | return 0; | |
224 | } | |
225 | ||
ee5b1e28 | 226 | |
f1a49684 | 227 | if (!(sk = chain_from_pem_file((const uschar *)ocsp_stapling))) |
f5d78688 JH |
228 | { |
229 | BIO_printf(arg, "error in cert setup\n"); | |
230 | return 0; | |
231 | } | |
232 | ||
ee5b1e28 JH |
233 | /* OCSP_basic_verify takes a "store" arg, but does not |
234 | use it for the chain verification, which is all we do | |
235 | when OCSP_NOVERIFY is set. The content from the wire | |
236 | (in "bs") and a cert-stack "sk" are all that is used. */ | |
237 | ||
238 | if(OCSP_basic_verify(bs, sk, NULL, OCSP_NOVERIFY) <= 0) | |
f5d78688 JH |
239 | { |
240 | BIO_printf(arg, "Response Verify Failure\n"); | |
241 | ERR_print_errors(arg); | |
242 | ret = 0; | |
243 | } | |
244 | else | |
245 | BIO_printf(arg, "Response verify OK\n"); | |
246 | ||
ee5b1e28 | 247 | cert_stack_free(sk); |
f5d78688 JH |
248 | return ret; |
249 | } | |
3b3634d0 | 250 | # endif /*DISABLE_OCSP*/ |
f5d78688 JH |
251 | |
252 | ||
c55a77db PH |
253 | /************************************************* |
254 | * Start an OpenSSL TLS session * | |
255 | *************************************************/ | |
256 | ||
2b4a568d JH |
257 | int |
258 | tls_start(int sock, SSL **ssl, SSL_CTX *ctx) | |
c55a77db PH |
259 | { |
260 | int rc; | |
57cde6e4 | 261 | static const unsigned char *sid_ctx = US"exim"; |
c55a77db PH |
262 | |
263 | RAND_load_file("client.c", -1); /* Not *very* random! */ | |
264 | ||
265 | *ssl = SSL_new (ctx); | |
57cde6e4 | 266 | SSL_set_session_id_context(*ssl, sid_ctx, strlen(CS sid_ctx)); |
c55a77db PH |
267 | SSL_set_fd (*ssl, sock); |
268 | SSL_set_connect_state(*ssl); | |
269 | ||
6d68e1c7 | 270 | #ifndef DISABLE_OCSP |
f5d78688 JH |
271 | if (ocsp_stapling) |
272 | { | |
273 | SSL_CTX_set_tlsext_status_cb(ctx, tls_client_stapling_cb); | |
274 | SSL_CTX_set_tlsext_status_arg(ctx, BIO_new_fp(stdout, BIO_NOCLOSE)); | |
275 | SSL_set_tlsext_status_type(*ssl, TLSEXT_STATUSTYPE_ocsp); | |
276 | } | |
6d68e1c7 | 277 | #endif |
f5d78688 | 278 | |
c55a77db PH |
279 | signal(SIGALRM, sigalrm_handler_flag); |
280 | sigalrm_seen = 0; | |
281 | alarm(5); | |
282 | rc = SSL_connect (*ssl); | |
283 | alarm(0); | |
284 | ||
285 | if (sigalrm_seen) | |
286 | { | |
287 | printf("SSL_connect timed out\n"); | |
288 | return 0; | |
289 | } | |
290 | ||
291 | if (rc <= 0) | |
292 | { | |
293 | ERR_print_errors_fp(stdout); | |
294 | return 0; | |
295 | } | |
296 | ||
297 | printf("SSL connection using %s\n", SSL_get_cipher (*ssl)); | |
298 | return 1; | |
299 | } | |
300 | ||
301 | ||
302 | /************************************************* | |
303 | * SSL Information callback * | |
304 | *************************************************/ | |
305 | ||
306 | static void | |
307 | info_callback(SSL *s, int where, int ret) | |
308 | { | |
309 | where = where; | |
310 | ret = ret; | |
311 | printf("SSL info: %s\n", SSL_state_string_long(s)); | |
312 | } | |
313 | #endif | |
314 | ||
315 | ||
316 | /****************************************************************************/ | |
317 | /****************************************************************************/ | |
318 | ||
319 | ||
320 | #ifdef HAVE_GNUTLS | |
321 | /************************************************* | |
322 | * Handle GnuTLS error * | |
323 | *************************************************/ | |
324 | ||
325 | /* Called from lots of places when errors occur before actually starting to do | |
326 | the TLS handshake, that is, while the session is still in clear. | |
327 | ||
328 | Argument: | |
329 | prefix prefix text | |
330 | err a GnuTLS error number, or 0 if local error | |
331 | ||
332 | Returns: doesn't - it dies | |
333 | */ | |
334 | ||
335 | static void | |
336 | gnutls_error(uschar *prefix, int err) | |
337 | { | |
bb727765 | 338 | fprintf(stderr, "GnuTLS connection error: %s:", prefix); |
c55a77db PH |
339 | if (err != 0) fprintf(stderr, " %s", gnutls_strerror(err)); |
340 | fprintf(stderr, "\n"); | |
9ff403f8 | 341 | exit(98); |
c55a77db PH |
342 | } |
343 | ||
344 | ||
345 | ||
346 | /************************************************* | |
bb727765 | 347 | * Setup up DH parameters * |
c55a77db PH |
348 | *************************************************/ |
349 | ||
350 | /* For the test suite, the parameters should always be available in the spool | |
351 | directory. */ | |
352 | ||
353 | static void | |
bb727765 | 354 | init_dh(void) |
c55a77db PH |
355 | { |
356 | int fd; | |
357 | int ret; | |
fc4fcc34 | 358 | gnutls_datum_t m; |
c55a77db PH |
359 | uschar filename[200]; |
360 | struct stat statbuf; | |
361 | ||
362 | /* Initialize the data structures for holding the parameters */ | |
363 | ||
c55a77db PH |
364 | ret = gnutls_dh_params_init(&dh_params); |
365 | if (ret < 0) gnutls_error(US"init dh_params", ret); | |
366 | ||
367 | /* Open the cache file for reading and if successful, read it and set up the | |
bb727765 | 368 | parameters. */ |
c55a77db PH |
369 | |
370 | fd = open("aux-fixed/gnutls-params", O_RDONLY, 0); | |
371 | if (fd < 0) | |
372 | { | |
373 | fprintf(stderr, "Failed to open spool/gnutls-params: %s\n", strerror(errno)); | |
9ff403f8 | 374 | exit(97); |
c55a77db PH |
375 | } |
376 | ||
377 | if (fstat(fd, &statbuf) < 0) | |
378 | { | |
379 | (void)close(fd); | |
380 | return gnutls_error(US"TLS cache stat failed", 0); | |
381 | } | |
382 | ||
383 | m.size = statbuf.st_size; | |
384 | m.data = malloc(m.size); | |
385 | if (m.data == NULL) | |
386 | return gnutls_error(US"memory allocation failed", 0); | |
387 | if (read(fd, m.data, m.size) != m.size) | |
388 | return gnutls_error(US"TLS cache read failed", 0); | |
389 | (void)close(fd); | |
390 | ||
c55a77db PH |
391 | ret = gnutls_dh_params_import_pkcs3(dh_params, &m, GNUTLS_X509_FMT_PEM); |
392 | if (ret < 0) return gnutls_error(US"DH params import", ret); | |
393 | free(m.data); | |
394 | } | |
395 | ||
396 | ||
397 | ||
398 | ||
399 | /************************************************* | |
400 | * Initialize for GnuTLS * | |
401 | *************************************************/ | |
402 | ||
403 | /* | |
404 | Arguments: | |
405 | certificate certificate file | |
406 | privatekey private key file | |
407 | */ | |
408 | ||
409 | static void | |
410 | tls_init(uschar *certificate, uschar *privatekey) | |
411 | { | |
412 | int rc; | |
413 | ||
414 | rc = gnutls_global_init(); | |
415 | if (rc < 0) gnutls_error(US"gnutls_global_init", rc); | |
416 | ||
bb727765 | 417 | /* Read D-H parameters from the cache file. */ |
c55a77db | 418 | |
bb727765 | 419 | init_dh(); |
c55a77db PH |
420 | |
421 | /* Create the credentials structure */ | |
422 | ||
423 | rc = gnutls_certificate_allocate_credentials(&x509_cred); | |
424 | if (rc < 0) gnutls_error(US"certificate_allocate_credentials", rc); | |
425 | ||
426 | /* Set the certificate and private keys */ | |
427 | ||
428 | if (certificate != NULL) | |
429 | { | |
430 | rc = gnutls_certificate_set_x509_key_file(x509_cred, CS certificate, | |
431 | CS privatekey, GNUTLS_X509_FMT_PEM); | |
432 | if (rc < 0) gnutls_error("gnutls_certificate", rc); | |
433 | } | |
434 | ||
435 | /* Associate the parameters with the x509 credentials structure. */ | |
436 | ||
437 | gnutls_certificate_set_dh_params(x509_cred, dh_params); | |
2b4a568d JH |
438 | |
439 | /* set the CA info for server-cert verify */ | |
440 | if (ocsp_stapling) | |
441 | gnutls_certificate_set_x509_trust_file(x509_cred, ocsp_stapling, | |
442 | GNUTLS_X509_FMT_PEM); | |
c55a77db PH |
443 | } |
444 | ||
445 | ||
446 | ||
447 | /************************************************* | |
448 | * Initialize a single GNUTLS session * | |
449 | *************************************************/ | |
450 | ||
fc4fcc34 | 451 | static gnutls_session_t |
c55a77db PH |
452 | tls_session_init(void) |
453 | { | |
fc4fcc34 | 454 | gnutls_session_t session; |
c55a77db | 455 | |
0886a95e | 456 | gnutls_init(&session, GNUTLS_CLIENT | GNUTLS_NO_EXTENSIONS); |
c55a77db | 457 | |
ba86e143 | 458 | # if GNUTLS_VERSION_NUMBER < 0x030400 |
c55a77db PH |
459 | gnutls_cipher_set_priority(session, default_cipher_priority); |
460 | gnutls_compression_set_priority(session, comp_priority); | |
461 | gnutls_kx_set_priority(session, kx_priority); | |
462 | gnutls_protocol_set_priority(session, protocol_priority); | |
463 | gnutls_mac_set_priority(session, mac_priority); | |
464 | ||
465 | gnutls_cred_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); | |
ba86e143 JH |
466 | # else |
467 | if (pri_string) | |
468 | { | |
469 | gnutls_priority_t priority_cache; | |
470 | const char * errpos; | |
471 | ||
472 | gnutls_priority_init(&priority_cache, pri_string, &errpos); | |
473 | gnutls_priority_set(session, priority_cache); | |
474 | } | |
475 | else | |
476 | gnutls_set_default_priority(session); | |
fc4fcc34 | 477 | gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); |
ba86e143 | 478 | # endif |
c55a77db PH |
479 | |
480 | gnutls_dh_set_prime_bits(session, DH_BITS); | |
481 | gnutls_db_set_cache_expiration(session, ssl_session_timeout); | |
482 | ||
483 | return session; | |
484 | } | |
485 | #endif | |
486 | ||
487 | ||
488 | /****************************************************************************/ | |
5d036699 JH |
489 | /* Turn "\n" and "\r" into the relevant characters. This is a hack. */ |
490 | ||
491 | static int | |
492 | unescape_buf(unsigned char * buf, int len) | |
493 | { | |
494 | unsigned char * s; | |
495 | unsigned char c, t; | |
496 | unsigned shift; | |
497 | ||
498 | for (s = buf; s < buf+len; s++) if (*s == '\\') | |
499 | { | |
500 | switch (s[1]) | |
501 | { | |
502 | default: c = s[1]; shift = 1; break; | |
503 | case 'n': c = '\n'; shift = 1; break; | |
504 | case 'r': c = '\r'; shift = 1; break; | |
505 | case 'x': | |
506 | t = s[2]; | |
507 | if (t >= 'A' && t <= 'F') t -= 'A'-'9'-1; | |
508 | else if (t >= 'a' && t <= 'f') t -= 'a'-'9'-1; | |
509 | t -= '0'; | |
510 | c = (t<<4) & 0xf0; | |
511 | t = s[3]; | |
512 | if (t >= 'A' && t <= 'F') t -= 'A'-'9'-1; | |
513 | else if (t >= 'a' && t <= 'f') t -= 'a'-'9'-1; | |
514 | t -= '0'; | |
515 | c |= t & 0xf; | |
516 | shift = 3; | |
517 | break; | |
518 | } | |
519 | *s = c; | |
520 | memmove(s+1, s+shift+1, len-shift); | |
521 | len -= shift; | |
522 | } | |
523 | return len; | |
524 | } | |
525 | ||
526 | ||
c55a77db | 527 | /****************************************************************************/ |
7bbb3621 JH |
528 | typedef struct { |
529 | int sock; | |
530 | int tls_active; | |
531 | #ifdef HAVE_OPENSSL | |
532 | SSL_CTX * ctx; | |
533 | SSL * ssl; | |
534 | #endif | |
535 | int sent_starttls; | |
536 | } srv_ctx; | |
537 | ||
538 | static void | |
539 | do_file(srv_ctx * srv, FILE * f, int timeout, | |
540 | unsigned char * inbuffer, unsigned bsiz, unsigned char * inptr) | |
541 | { | |
b9df1829 | 542 | unsigned char outbuffer[1024 * 20]; |
7bbb3621 JH |
543 | |
544 | while (fgets(CS outbuffer, sizeof(outbuffer), f) != NULL) | |
545 | { | |
546 | int n = (int)strlen(CS outbuffer); | |
547 | int crlf = 1; | |
548 | int rc; | |
549 | ||
550 | /* Strip trailing newline */ | |
551 | if (outbuffer[n-1] == '\n') outbuffer[--n] = 0; | |
552 | ||
553 | /* Expect incoming */ | |
554 | ||
555 | if ( strncmp(CS outbuffer, "???", 3) == 0 | |
ce80533b | 556 | && (outbuffer[3] == ' ' || outbuffer[3] == '*' || outbuffer[3] == '?') |
7bbb3621 JH |
557 | ) |
558 | { | |
559 | unsigned char *lineptr; | |
560 | unsigned exp_eof = outbuffer[3] == '*'; | |
ce80533b | 561 | unsigned resp_optional = outbuffer[3] == '?'; |
7bbb3621 JH |
562 | |
563 | printf("%s\n", outbuffer); | |
564 | n = unescape_buf(outbuffer, n); | |
565 | ||
ce80533b | 566 | nextinput: |
7bbb3621 JH |
567 | if (*inptr == 0) /* Refill input buffer */ |
568 | { | |
ce80533b | 569 | alarm(timeout); |
7bbb3621 JH |
570 | if (srv->tls_active) |
571 | { | |
572 | #ifdef HAVE_OPENSSL | |
ce80533b | 573 | rc = SSL_read(srv->ssl, inbuffer, bsiz - 1); |
7bbb3621 JH |
574 | #endif |
575 | #ifdef HAVE_GNUTLS | |
576 | rc = gnutls_record_recv(tls_session, CS inbuffer, bsiz - 1); | |
577 | #endif | |
578 | } | |
579 | else | |
7bbb3621 | 580 | rc = read(srv->sock, inbuffer, bsiz); |
ce80533b | 581 | alarm(0); |
7bbb3621 JH |
582 | |
583 | if (rc < 0) | |
584 | { | |
585 | printf("Read error %s\n", strerror(errno)); | |
586 | exit(81); | |
587 | } | |
588 | else if (rc == 0) | |
589 | if (exp_eof) | |
590 | { | |
591 | printf("Expected EOF read\n"); | |
592 | continue; | |
593 | } | |
594 | else | |
595 | { | |
596 | printf("Unexpected EOF read\n"); | |
597 | close(srv->sock); | |
598 | exit(80); | |
599 | } | |
600 | else if (exp_eof) | |
601 | { | |
602 | printf("Expected EOF not read\n"); | |
603 | close(srv->sock); | |
604 | exit(74); | |
605 | } | |
606 | else | |
607 | { | |
608 | inbuffer[rc] = 0; | |
609 | inptr = inbuffer; | |
610 | } | |
611 | } | |
612 | ||
613 | lineptr = inptr; | |
614 | while (*inptr != 0 && *inptr != '\r' && *inptr != '\n') inptr++; | |
615 | if (*inptr != 0) | |
616 | { | |
617 | *inptr++ = 0; | |
618 | if (*inptr == '\n') inptr++; | |
619 | } | |
620 | ||
7bbb3621 | 621 | if (strncmp(CS lineptr, CS outbuffer + 4, n - 4) != 0) |
ce80533b JH |
622 | if (resp_optional) |
623 | { | |
624 | inptr = lineptr; /* consume scriptline, not inputline */ | |
625 | continue; | |
626 | } | |
627 | else | |
628 | { | |
629 | printf("<<< %s\n", lineptr); | |
630 | printf("\n******** Input mismatch ********\n"); | |
631 | exit(79); | |
632 | } | |
633 | ||
634 | /* input matched script */ | |
635 | ||
636 | if (resp_optional) | |
637 | goto nextinput; /* consume inputline, not scriptline */ | |
638 | ||
639 | printf("<<< %s\n", lineptr); | |
7bbb3621 JH |
640 | |
641 | #ifdef HAVE_TLS | |
642 | if (srv->sent_starttls) | |
643 | { | |
644 | if (lineptr[0] == '2') | |
645 | { | |
7bbb3621 JH |
646 | unsigned int verify; |
647 | ||
648 | printf("Attempting to start TLS\n"); | |
649 | fflush(stdout); | |
650 | ||
651 | #ifdef HAVE_OPENSSL | |
652 | srv->tls_active = tls_start(srv->sock, &srv->ssl, srv->ctx); | |
653 | #endif | |
654 | ||
655 | #ifdef HAVE_GNUTLS | |
656 | { | |
657 | int rc; | |
658 | sigalrm_seen = FALSE; | |
659 | alarm(timeout); | |
660 | do { | |
661 | rc = gnutls_handshake(tls_session); | |
662 | } while (rc < 0 && gnutls_error_is_fatal(rc) == 0); | |
663 | srv->tls_active = rc >= 0; | |
664 | alarm(0); | |
665 | ||
666 | if (!srv->tls_active) printf("%s\n", gnutls_strerror(rc)); | |
667 | } | |
668 | #endif | |
669 | ||
670 | if (!srv->tls_active) | |
671 | { | |
672 | printf("Failed to start TLS\n"); | |
673 | fflush(stdout); | |
674 | } | |
675 | #ifdef HAVE_GNUTLS | |
676 | else if (ocsp_stapling) | |
677 | { | |
678 | if ((rc= gnutls_certificate_verify_peers2(tls_session, &verify)) < 0) | |
679 | { | |
680 | printf("Failed to verify certificate: %s\n", gnutls_strerror(rc)); | |
681 | fflush(stdout); | |
682 | } | |
683 | else if (verify & (GNUTLS_CERT_INVALID|GNUTLS_CERT_REVOKED)) | |
684 | { | |
685 | printf("Bad certificate\n"); | |
686 | fflush(stdout); | |
687 | } | |
688 | #ifdef HAVE_OCSP | |
689 | else if (gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) | |
690 | { | |
691 | printf("Failed to verify certificate status\n"); | |
692 | { | |
693 | gnutls_datum_t stapling; | |
694 | gnutls_ocsp_resp_t resp; | |
695 | gnutls_datum_t printed; | |
696 | if ( (rc= gnutls_ocsp_status_request_get(tls_session, &stapling)) == 0 | |
697 | && (rc= gnutls_ocsp_resp_init(&resp)) == 0 | |
698 | && (rc= gnutls_ocsp_resp_import(resp, &stapling)) == 0 | |
699 | && (rc= gnutls_ocsp_resp_print(resp, GNUTLS_OCSP_PRINT_FULL, &printed)) == 0 | |
700 | ) | |
701 | { | |
702 | fprintf(stderr, "%.4096s", printed.data); | |
703 | gnutls_free(printed.data); | |
704 | } | |
705 | else | |
706 | (void) fprintf(stderr,"ocsp decode: %s", gnutls_strerror(rc)); | |
707 | } | |
708 | fflush(stdout); | |
709 | } | |
710 | #endif | |
711 | } | |
712 | #endif | |
713 | else | |
714 | printf("Succeeded in starting TLS\n"); | |
715 | } | |
716 | else printf("Abandoning TLS start attempt\n"); | |
717 | } | |
718 | srv->sent_starttls = 0; | |
719 | #endif | |
720 | } | |
721 | ||
722 | /* Wait for a bit before proceeding */ | |
723 | ||
724 | else if (strncmp(CS outbuffer, "+++ ", 4) == 0) | |
725 | { | |
726 | printf("%s\n", outbuffer); | |
727 | sleep(atoi(CS outbuffer + 4)); | |
728 | } | |
729 | ||
730 | /* Stack new input file */ | |
731 | ||
732 | else if (strncmp(CS outbuffer, "<<< ", 4) == 0) | |
733 | { | |
734 | FILE * new_f; | |
f1a49684 | 735 | if (!(new_f = fopen((const char *)outbuffer+4 , "r"))) |
7bbb3621 | 736 | { |
768e8b5b | 737 | printf("Unable to open '%s': %s", inptr, strerror(errno)); |
7bbb3621 JH |
738 | exit(74); |
739 | } | |
740 | do_file(srv, new_f, timeout, inbuffer, bsiz, inptr); | |
741 | } | |
742 | ||
743 | ||
744 | /* Send line outgoing, but barf if unconsumed incoming */ | |
745 | ||
746 | else | |
747 | { | |
748 | unsigned char * out = outbuffer; | |
749 | ||
750 | if (strncmp(CS outbuffer, ">>> ", 4) == 0) | |
751 | { | |
752 | crlf = 0; | |
753 | out += 4; | |
754 | n -= 4; | |
755 | } | |
756 | ||
757 | if (*inptr != 0) | |
758 | { | |
759 | printf("Unconsumed input: %s", inptr); | |
760 | printf(" About to send: %s\n", out); | |
761 | exit(78); | |
762 | } | |
763 | ||
764 | #ifdef HAVE_TLS | |
765 | ||
766 | /* Shutdown TLS */ | |
767 | ||
768 | if (strcmp(CS out, "stoptls") == 0 || | |
769 | strcmp(CS out, "STOPTLS") == 0) | |
770 | { | |
771 | if (!srv->tls_active) | |
772 | { | |
773 | printf("STOPTLS read when TLS not active\n"); | |
774 | exit(77); | |
775 | } | |
776 | printf("Shutting down TLS encryption\n"); | |
777 | ||
778 | #ifdef HAVE_OPENSSL | |
779 | SSL_shutdown(srv->ssl); | |
780 | SSL_free(srv->ssl); | |
781 | #endif | |
782 | ||
783 | #ifdef HAVE_GNUTLS | |
784 | gnutls_bye(tls_session, GNUTLS_SHUT_WR); | |
785 | gnutls_deinit(tls_session); | |
786 | tls_session = NULL; | |
787 | gnutls_global_deinit(); | |
788 | #endif | |
789 | ||
790 | srv->tls_active = 0; | |
791 | continue; | |
792 | } | |
793 | ||
794 | /* Remember that we sent STARTTLS */ | |
795 | ||
796 | srv->sent_starttls = (strcmp(CS out, "starttls") == 0 || | |
797 | strcmp(CS out, "STARTTLS") == 0); | |
798 | ||
799 | /* Fudge: if the command is "starttls_wait", we send the starttls bit, | |
800 | but we haven't set the flag, so that there is no negotiation. This is for | |
801 | testing the server's timeout. */ | |
802 | ||
803 | if (strcmp(CS out, "starttls_wait") == 0) | |
804 | { | |
805 | out[8] = 0; | |
806 | n = 8; | |
807 | } | |
808 | #endif | |
809 | ||
810 | printf(">>> %s\n", out); | |
811 | if (crlf) | |
812 | { | |
813 | strcpy(CS out + n, "\r\n"); | |
814 | n += 2; | |
815 | } | |
816 | ||
817 | n = unescape_buf(out, n); | |
818 | ||
819 | /* OK, do it */ | |
820 | ||
821 | alarm(timeout); | |
822 | if (srv->tls_active) | |
823 | { | |
824 | #ifdef HAVE_OPENSSL | |
825 | rc = SSL_write (srv->ssl, out, n); | |
826 | #endif | |
827 | #ifdef HAVE_GNUTLS | |
828 | if ((rc = gnutls_record_send(tls_session, CS out, n)) < 0) | |
829 | { | |
830 | printf("GnuTLS write error: %s\n", gnutls_strerror(rc)); | |
831 | exit(76); | |
832 | } | |
833 | #endif | |
834 | } | |
835 | else | |
836 | rc = write(srv->sock, out, n); | |
837 | alarm(0); | |
838 | ||
839 | if (rc < 0) | |
840 | { | |
841 | printf("Write error: %s\n", strerror(errno)); | |
842 | exit(75); | |
843 | } | |
844 | } | |
845 | } | |
846 | } | |
c55a77db PH |
847 | |
848 | ||
849 | ||
850 | ||
851 | /************************************************* | |
852 | * Main Program * | |
853 | *************************************************/ | |
854 | ||
4fe99a6c | 855 | const char * const HELP_MESSAGE = "\n\ |
972e83f5 HSHR |
856 | Usage: client\n" |
857 | #ifdef HAVE_TLS | |
858 | "\ | |
859 | [-tls-on-connect]\n\ | |
860 | [-ocsp]\n" | |
ba86e143 JH |
861 | # ifdef HAVE_GNUTLS |
862 | "\ | |
863 | [-p priority-string]\n" | |
864 | # endif | |
972e83f5 HSHR |
865 | #endif |
866 | "\ | |
867 | [-tn] n seconds timeout\n\ | |
4fe99a6c PP |
868 | <IP address>\n\ |
869 | <port>\n\ | |
870 | [<outgoing interface>]\n\ | |
871 | [<cert file>]\n\ | |
872 | [<key file>]\n\ | |
873 | \n"; | |
c55a77db | 874 | |
5d036699 JH |
875 | int |
876 | main(int argc, char **argv) | |
c55a77db PH |
877 | { |
878 | struct sockaddr *s_ptr; | |
879 | struct sockaddr_in s_in4; | |
880 | char *interface = NULL; | |
881 | char *address = NULL; | |
882 | char *certfile = NULL; | |
883 | char *keyfile = NULL; | |
1ec3f27d | 884 | char *end = NULL; |
c55a77db | 885 | int argi = 1; |
7bbb3621 | 886 | int host_af, port, s_len, rc, save_errno; |
d528a389 | 887 | int timeout = 5; |
c55a77db | 888 | int tls_on_connect = 0; |
1ec3f27d | 889 | long tmplong; |
c55a77db PH |
890 | |
891 | #if HAVE_IPV6 | |
892 | struct sockaddr_in6 s_in6; | |
893 | #endif | |
894 | ||
7bbb3621 | 895 | srv_ctx srv; |
c55a77db | 896 | |
c55a77db PH |
897 | unsigned char inbuffer[10240]; |
898 | unsigned char *inptr = inbuffer; | |
899 | ||
900 | *inptr = 0; /* Buffer empty */ | |
7bbb3621 JH |
901 | srv.tls_active = 0; |
902 | srv.sent_starttls = 0; | |
c55a77db PH |
903 | |
904 | /* Options */ | |
905 | ||
906 | while (argc >= argi + 1 && argv[argi][0] == '-') | |
907 | { | |
4fe99a6c PP |
908 | if (strcmp(argv[argi], "-help") == 0 || |
909 | strcmp(argv[argi], "--help") == 0 || | |
910 | strcmp(argv[argi], "-h") == 0) | |
911 | { | |
dd4c8678 | 912 | puts(HELP_MESSAGE); |
4fe99a6c PP |
913 | exit(0); |
914 | } | |
c55a77db PH |
915 | if (strcmp(argv[argi], "-tls-on-connect") == 0) |
916 | { | |
917 | tls_on_connect = 1; | |
918 | argi++; | |
919 | } | |
2b4a568d | 920 | #ifdef HAVE_TLS |
f5d78688 JH |
921 | else if (strcmp(argv[argi], "-ocsp") == 0) |
922 | { | |
923 | if (argc < ++argi + 1) | |
924 | { | |
925 | fprintf(stderr, "Missing required certificate file for ocsp option\n"); | |
9ff403f8 | 926 | exit(96); |
f5d78688 JH |
927 | } |
928 | ocsp_stapling = argv[argi++]; | |
929 | } | |
ba86e143 JH |
930 | # ifdef HAVE_GNUTLS |
931 | else if (strcmp(argv[argi], "-p") == 0) | |
932 | { | |
933 | if (argc < ++argi + 1) | |
934 | { | |
935 | fprintf(stderr, "Missing priority string\n"); | |
936 | exit(96); | |
937 | } | |
938 | pri_string = argv[argi++]; | |
939 | } | |
940 | #endif | |
2b4a568d | 941 | |
f5d78688 | 942 | #endif |
c55a77db PH |
943 | else if (argv[argi][1] == 't' && isdigit(argv[argi][2])) |
944 | { | |
1ec3f27d PP |
945 | tmplong = strtol(argv[argi]+2, &end, 10); |
946 | if (end == argv[argi]+2 || *end) | |
947 | { | |
948 | fprintf(stderr, "Failed to parse seconds from option <%s>\n", | |
949 | argv[argi]); | |
9ff403f8 | 950 | exit(95); |
1ec3f27d PP |
951 | } |
952 | if (tmplong > 10000L) | |
953 | { | |
dd4c8678 | 954 | fprintf(stderr, "Unreasonably long wait of %ld seconds requested\n", |
1ec3f27d | 955 | tmplong); |
9ff403f8 | 956 | exit(94); |
1ec3f27d PP |
957 | } |
958 | if (tmplong < 0L) | |
959 | { | |
dd4c8678 | 960 | fprintf(stderr, "Timeout must not be negative (%ld)\n", tmplong); |
9ff403f8 | 961 | exit(93); |
1ec3f27d PP |
962 | } |
963 | timeout = (int) tmplong; | |
c55a77db PH |
964 | argi++; |
965 | } | |
966 | else | |
967 | { | |
1ec3f27d | 968 | fprintf(stderr, "Unrecognized option %s\n", argv[argi]); |
9ff403f8 | 969 | exit(92); |
c55a77db PH |
970 | } |
971 | } | |
972 | ||
973 | /* Mandatory 1st arg is IP address */ | |
974 | ||
975 | if (argc < argi+1) | |
976 | { | |
1ec3f27d | 977 | fprintf(stderr, "No IP address given\n"); |
9ff403f8 | 978 | exit(91); |
c55a77db PH |
979 | } |
980 | ||
981 | address = argv[argi++]; | |
982 | host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET; | |
983 | ||
984 | /* Mandatory 2nd arg is port */ | |
985 | ||
986 | if (argc < argi+1) | |
987 | { | |
1ec3f27d | 988 | fprintf(stderr, "No port number given\n"); |
9ff403f8 | 989 | exit(90); |
c55a77db PH |
990 | } |
991 | ||
992 | port = atoi(argv[argi++]); | |
993 | ||
994 | /* Optional next arg is interface */ | |
995 | ||
996 | if (argc > argi && | |
997 | (isdigit((unsigned char)argv[argi][0]) || argv[argi][0] == ':')) | |
998 | interface = argv[argi++]; | |
999 | ||
1000 | /* Any more arguments are the name of a certificate file and key file */ | |
1001 | ||
1002 | if (argc > argi) certfile = argv[argi++]; | |
1003 | if (argc > argi) keyfile = argv[argi++]; | |
1004 | ||
1005 | ||
1006 | #if HAVE_IPV6 | |
1007 | /* For an IPv6 address, use an IPv6 sockaddr structure. */ | |
1008 | ||
1009 | if (host_af == AF_INET6) | |
1010 | { | |
1011 | s_ptr = (struct sockaddr *)&s_in6; | |
1012 | s_len = sizeof(s_in6); | |
1013 | } | |
1014 | else | |
1015 | #endif | |
1016 | ||
1017 | /* For an IPv4 address, use an IPv4 sockaddr structure, | |
1018 | even on an IPv6 system. */ | |
1019 | ||
1020 | { | |
1021 | s_ptr = (struct sockaddr *)&s_in4; | |
1022 | s_len = sizeof(s_in4); | |
1023 | } | |
1024 | ||
1025 | printf("Connecting to %s port %d ... ", address, port); | |
1026 | ||
7bbb3621 JH |
1027 | srv.sock = socket(host_af, SOCK_STREAM, 0); |
1028 | if (srv.sock < 0) | |
c55a77db PH |
1029 | { |
1030 | printf("socket creation failed: %s\n", strerror(errno)); | |
9ff403f8 | 1031 | exit(89); |
c55a77db PH |
1032 | } |
1033 | ||
1034 | /* Bind to a specific interface if requested. On an IPv6 system, this has | |
1035 | to be of the same family as the address we are calling. On an IPv4 system the | |
1036 | test is redundant, but it keeps the code tidier. */ | |
1037 | ||
1038 | if (interface != NULL) | |
1039 | { | |
1040 | int interface_af = (strchr(interface, ':') != NULL)? AF_INET6 : AF_INET; | |
1041 | ||
1042 | if (interface_af == host_af) | |
1043 | { | |
1044 | #if HAVE_IPV6 | |
1045 | ||
1046 | /* Set up for IPv6 binding */ | |
1047 | ||
1048 | if (host_af == AF_INET6) | |
1049 | { | |
1050 | memset(&s_in6, 0, sizeof(s_in6)); | |
1051 | s_in6.sin6_family = AF_INET6; | |
1052 | s_in6.sin6_port = 0; | |
1053 | if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1) | |
1054 | { | |
1055 | printf("Unable to parse \"%s\"", interface); | |
9ff403f8 | 1056 | exit(88); |
c55a77db PH |
1057 | } |
1058 | } | |
1059 | else | |
1060 | #endif | |
1061 | ||
1062 | /* Set up for IPv4 binding */ | |
1063 | ||
1064 | { | |
1065 | memset(&s_in4, 0, sizeof(s_in4)); | |
1066 | s_in4.sin_family = AF_INET; | |
1067 | s_in4.sin_port = 0; | |
1068 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(interface); | |
1069 | } | |
1070 | ||
1071 | /* Bind */ | |
1072 | ||
7bbb3621 | 1073 | if (bind(srv.sock, s_ptr, s_len) < 0) |
c55a77db PH |
1074 | { |
1075 | printf("Unable to bind outgoing SMTP call to %s: %s", | |
1076 | interface, strerror(errno)); | |
9ff403f8 | 1077 | exit(87); |
c55a77db PH |
1078 | } |
1079 | } | |
1080 | } | |
1081 | ||
1082 | /* Set up a remote IPv6 address */ | |
1083 | ||
1084 | #if HAVE_IPV6 | |
1085 | if (host_af == AF_INET6) | |
1086 | { | |
1087 | memset(&s_in6, 0, sizeof(s_in6)); | |
1088 | s_in6.sin6_family = AF_INET6; | |
1089 | s_in6.sin6_port = htons(port); | |
1090 | if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1) | |
1091 | { | |
1092 | printf("Unable to parse \"%s\"", address); | |
9ff403f8 | 1093 | exit(86); |
c55a77db PH |
1094 | } |
1095 | } | |
1096 | else | |
1097 | #endif | |
1098 | ||
1099 | /* Set up a remote IPv4 address */ | |
1100 | ||
1101 | { | |
1102 | memset(&s_in4, 0, sizeof(s_in4)); | |
1103 | s_in4.sin_family = AF_INET; | |
1104 | s_in4.sin_port = htons(port); | |
1105 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(address); | |
1106 | } | |
1107 | ||
1108 | /* SIGALRM handler crashes out */ | |
1109 | ||
1110 | signal(SIGALRM, sigalrm_handler_crash); | |
1111 | alarm(timeout); | |
7bbb3621 | 1112 | rc = connect(srv.sock, s_ptr, s_len); |
c55a77db PH |
1113 | save_errno = errno; |
1114 | alarm(0); | |
1115 | ||
1116 | /* A failure whose error code is "Interrupted system call" is in fact | |
1117 | an externally applied timeout if the signal handler has been run. */ | |
1118 | ||
1119 | if (rc < 0) | |
1120 | { | |
7bbb3621 | 1121 | close(srv.sock); |
41fdef91 | 1122 | printf("connect failed: %s\n", strerror(save_errno)); |
9ff403f8 | 1123 | exit(85); |
c55a77db PH |
1124 | } |
1125 | ||
1126 | printf("connected\n"); | |
1127 | ||
1128 | ||
1129 | /* --------------- Set up for OpenSSL --------------- */ | |
1130 | ||
1131 | #ifdef HAVE_OPENSSL | |
1132 | SSL_library_init(); | |
1133 | SSL_load_error_strings(); | |
1134 | ||
7bbb3621 | 1135 | if (!(srv.ctx = SSL_CTX_new(SSLv23_method()))) |
c55a77db PH |
1136 | { |
1137 | printf ("SSL_CTX_new failed\n"); | |
9ff403f8 | 1138 | exit(84); |
c55a77db PH |
1139 | } |
1140 | ||
7bbb3621 | 1141 | if (certfile) |
c55a77db | 1142 | { |
7bbb3621 | 1143 | if (!SSL_CTX_use_certificate_file(srv.ctx, certfile, SSL_FILETYPE_PEM)) |
c55a77db PH |
1144 | { |
1145 | printf("SSL_CTX_use_certificate_file failed\n"); | |
9ff403f8 | 1146 | exit(83); |
c55a77db PH |
1147 | } |
1148 | printf("Certificate file = %s\n", certfile); | |
1149 | } | |
1150 | ||
7bbb3621 | 1151 | if (keyfile) |
c55a77db | 1152 | { |
7bbb3621 | 1153 | if (!SSL_CTX_use_PrivateKey_file(srv.ctx, keyfile, SSL_FILETYPE_PEM)) |
c55a77db PH |
1154 | { |
1155 | printf("SSL_CTX_use_PrivateKey_file failed\n"); | |
9ff403f8 | 1156 | exit(82); |
c55a77db PH |
1157 | } |
1158 | printf("Key file = %s\n", keyfile); | |
1159 | } | |
1160 | ||
7bbb3621 JH |
1161 | SSL_CTX_set_session_cache_mode(srv.ctx, SSL_SESS_CACHE_BOTH); |
1162 | SSL_CTX_set_timeout(srv.ctx, 200); | |
1163 | SSL_CTX_set_info_callback(srv.ctx, (void (*)())info_callback); | |
c55a77db PH |
1164 | #endif |
1165 | ||
1166 | ||
1167 | /* --------------- Set up for GnuTLS --------------- */ | |
1168 | ||
1169 | #ifdef HAVE_GNUTLS | |
1170 | if (certfile != NULL) printf("Certificate file = %s\n", certfile); | |
1171 | if (keyfile != NULL) printf("Key file = %s\n", keyfile); | |
1172 | tls_init(certfile, keyfile); | |
1173 | tls_session = tls_session_init(); | |
348051ad | 1174 | #ifdef HAVE_OCSP |
2b4a568d JH |
1175 | if (ocsp_stapling) |
1176 | gnutls_ocsp_status_request_enable_client(tls_session, NULL, 0, NULL); | |
348051ad | 1177 | #endif |
7bbb3621 | 1178 | gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr_t)(intptr_t)srv.sock); |
c55a77db PH |
1179 | |
1180 | /* When the server asks for a certificate and the client does not have one, | |
1181 | there is a SIGPIPE error in the gnutls_handshake() function for some reason | |
1182 | that is not understood. As luck would have it, this has never hit Exim itself | |
1183 | because it ignores SIGPIPE errors. Doing the same here allows it all to work as | |
1184 | one wants. */ | |
1185 | ||
1186 | signal(SIGPIPE, SIG_IGN); | |
1187 | #endif | |
1188 | ||
1189 | /* ---------------------------------------------- */ | |
1190 | ||
1191 | ||
1192 | /* Start TLS session if configured to do so without STARTTLS */ | |
1193 | ||
1194 | #ifdef HAVE_TLS | |
1195 | if (tls_on_connect) | |
1196 | { | |
1197 | printf("Attempting to start TLS\n"); | |
1198 | ||
fc4fcc34 | 1199 | #ifdef HAVE_OPENSSL |
7bbb3621 | 1200 | srv.tls_active = tls_start(srv.sock, &srv.ssl, srv.ctx); |
fc4fcc34 | 1201 | #endif |
c55a77db | 1202 | |
fc4fcc34 JH |
1203 | #ifdef HAVE_GNUTLS |
1204 | { | |
1205 | int rc; | |
c55a77db PH |
1206 | sigalrm_seen = FALSE; |
1207 | alarm(timeout); | |
fc4fcc34 JH |
1208 | do { |
1209 | rc = gnutls_handshake(tls_session); | |
1210 | } while (rc < 0 && gnutls_error_is_fatal(rc) == 0); | |
7bbb3621 | 1211 | srv.tls_active = rc >= 0; |
c55a77db | 1212 | alarm(0); |
fc4fcc34 | 1213 | |
7bbb3621 | 1214 | if (!srv.tls_active) printf("%s\n", gnutls_strerror(rc)); |
fc4fcc34 JH |
1215 | } |
1216 | #endif | |
c55a77db | 1217 | |
7bbb3621 | 1218 | if (!srv.tls_active) |
c55a77db | 1219 | printf("Failed to start TLS\n"); |
fc4fcc34 | 1220 | #if defined(HAVE_GNUTLS) && defined(HAVE_OCSP) |
2b4a568d JH |
1221 | else if ( ocsp_stapling |
1222 | && gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) | |
1223 | printf("Failed to verify certificate status\n"); | |
fc4fcc34 | 1224 | #endif |
c55a77db PH |
1225 | else |
1226 | printf("Succeeded in starting TLS\n"); | |
1227 | } | |
1228 | #endif | |
1229 | ||
7bbb3621 | 1230 | do_file(&srv, stdin, timeout, inbuffer, sizeof(inbuffer), inptr); |
c55a77db PH |
1231 | |
1232 | printf("End of script\n"); | |
7bbb3621 | 1233 | shutdown(srv.sock, SHUT_WR); |
ce80533b JH |
1234 | if (fcntl(srv.sock, F_SETFL, O_NONBLOCK) == 0) |
1235 | while (read(srv.sock, inbuffer, sizeof(inbuffer)) > 0) ; | |
7bbb3621 | 1236 | close(srv.sock); |
c55a77db PH |
1237 | |
1238 | exit(0); | |
1239 | } | |
1240 | ||
1241 | /* End of client.c */ |