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 | ||
90788405 JH |
39 | /* Set to TRUE to enable debug output */ |
40 | #define DEBUG if (FALSE) | |
41 | ||
c55a77db PH |
42 | #ifdef AF_INET6 |
43 | #define HAVE_IPV6 1 | |
44 | #endif | |
45 | ||
46 | #ifndef S_ADDR_TYPE | |
47 | #define S_ADDR_TYPE u_long | |
48 | #endif | |
49 | ||
50 | typedef unsigned char uschar; | |
51 | ||
52 | #define CS (char *) | |
53 | #define US (unsigned char *) | |
54 | ||
55 | #define FALSE 0 | |
56 | #define TRUE 1 | |
57 | ||
58 | ||
59 | ||
60 | static int sigalrm_seen = 0; | |
61 | ||
62 | ||
63 | /* TLS support can be optionally included, either for OpenSSL or GnuTLS. The | |
64 | latter needs a whole pile of tables. */ | |
c55a77db | 65 | #ifdef HAVE_OPENSSL |
348051ad JH |
66 | # define HAVE_TLS |
67 | # include <openssl/crypto.h> | |
68 | # include <openssl/x509.h> | |
69 | # include <openssl/pem.h> | |
70 | # include <openssl/ssl.h> | |
71 | # include <openssl/err.h> | |
72 | # include <openssl/rand.h> | |
839a3b0d JH |
73 | |
74 | # if OPENSSL_VERSION_NUMBER < 0x0090806fL && !defined(DISABLE_OCSP) && !defined(OPENSSL_NO_TLSEXT) | |
eca4debb TL |
75 | # warning "OpenSSL library version too old; define DISABLE_OCSP in Makefile" |
76 | # define DISABLE_OCSP | |
77 | # endif | |
6d68e1c7 TL |
78 | # ifndef DISABLE_OCSP |
79 | # include <openssl/ocsp.h> | |
80 | # endif | |
c55a77db PH |
81 | #endif |
82 | ||
83 | ||
84 | #ifdef HAVE_GNUTLS | |
348051ad JH |
85 | # define HAVE_TLS |
86 | # include <gnutls/gnutls.h> | |
87 | # include <gnutls/x509.h> | |
88 | # if GNUTLS_VERSION_NUMBER >= 0x030103 | |
89 | # define HAVE_OCSP | |
90 | # include <gnutls/ocsp.h> | |
5597be31 JH |
91 | # endif |
92 | # ifndef GNUTLS_NO_EXTENSIONS | |
93 | # define GNUTLS_NO_EXTENSIONS 0 | |
348051ad | 94 | # endif |
c55a77db | 95 | |
348051ad | 96 | # define DH_BITS 768 |
c55a77db PH |
97 | |
98 | /* Local static variables for GNUTLS */ | |
99 | ||
fc4fcc34 | 100 | static gnutls_dh_params_t dh_params = NULL; |
c55a77db PH |
101 | |
102 | static gnutls_certificate_credentials_t x509_cred = NULL; | |
fc4fcc34 | 103 | static gnutls_session_t tls_session = NULL; |
c55a77db PH |
104 | |
105 | static int ssl_session_timeout = 200; | |
106 | ||
107 | /* Priorities for TLS algorithms to use. */ | |
108 | ||
ba86e143 | 109 | # if GNUTLS_VERSION_NUMBER < 0x030400 |
c55a77db PH |
110 | static const int protocol_priority[16] = { GNUTLS_TLS1, GNUTLS_SSL3, 0 }; |
111 | ||
112 | static const int kx_priority[16] = { | |
113 | GNUTLS_KX_RSA, | |
114 | GNUTLS_KX_DHE_DSS, | |
115 | GNUTLS_KX_DHE_RSA, | |
c55a77db PH |
116 | 0 }; |
117 | ||
118 | static int default_cipher_priority[16] = { | |
119 | GNUTLS_CIPHER_AES_256_CBC, | |
120 | GNUTLS_CIPHER_AES_128_CBC, | |
121 | GNUTLS_CIPHER_3DES_CBC, | |
122 | GNUTLS_CIPHER_ARCFOUR_128, | |
123 | 0 }; | |
124 | ||
125 | static const int mac_priority[16] = { | |
126 | GNUTLS_MAC_SHA, | |
127 | GNUTLS_MAC_MD5, | |
128 | 0 }; | |
129 | ||
130 | static const int comp_priority[16] = { GNUTLS_COMP_NULL, 0 }; | |
ba86e143 | 131 | # endif |
c55a77db | 132 | |
348051ad | 133 | #endif /*HAVE_GNUTLS*/ |
c55a77db PH |
134 | |
135 | ||
136 | ||
2b4a568d JH |
137 | #ifdef HAVE_TLS |
138 | char * ocsp_stapling = NULL; | |
ba86e143 | 139 | char * pri_string = NULL; |
2b4a568d JH |
140 | #endif |
141 | ||
c55a77db PH |
142 | |
143 | /************************************************* | |
144 | * SIGALRM handler - crash out * | |
145 | *************************************************/ | |
146 | ||
147 | static void | |
148 | sigalrm_handler_crash(int sig) | |
149 | { | |
150 | sig = sig; /* Keep picky compilers happy */ | |
151 | printf("\nClient timed out\n"); | |
152 | exit(99); | |
153 | } | |
154 | ||
155 | ||
156 | /************************************************* | |
157 | * SIGALRM handler - set flag * | |
158 | *************************************************/ | |
159 | ||
160 | static void | |
161 | sigalrm_handler_flag(int sig) | |
162 | { | |
163 | sig = sig; /* Keep picky compilers happy */ | |
164 | sigalrm_seen = 1; | |
165 | } | |
166 | ||
167 | ||
168 | ||
169 | /****************************************************************************/ | |
170 | /****************************************************************************/ | |
171 | ||
172 | #ifdef HAVE_OPENSSL | |
3b3634d0 | 173 | # ifndef DISABLE_OCSP |
f5d78688 | 174 | |
ee5b1e28 | 175 | static STACK_OF(X509) * |
3b3634d0 | 176 | chain_from_pem_file(const uschar * file) |
ee5b1e28 | 177 | { |
3b3634d0 JH |
178 | BIO * bp; |
179 | X509 * x; | |
180 | STACK_OF(X509) * sk; | |
ee5b1e28 | 181 | |
3b3634d0 JH |
182 | if (!(sk = sk_X509_new_null())) return NULL; |
183 | if (!(bp = BIO_new_file(CS file, "r"))) return NULL; | |
184 | while ((x = PEM_read_bio_X509(bp, NULL, 0, NULL))) | |
185 | sk_X509_push(sk, x); | |
186 | BIO_free(bp); | |
ee5b1e28 JH |
187 | return sk; |
188 | } | |
189 | ||
3b3634d0 JH |
190 | |
191 | ||
ee5b1e28 JH |
192 | static void |
193 | cert_stack_free(STACK_OF(X509) * sk) | |
194 | { | |
195 | while (sk_X509_num(sk) > 0) (void) sk_X509_pop(sk); | |
196 | sk_X509_free(sk); | |
197 | } | |
198 | ||
199 | ||
f5d78688 JH |
200 | static int |
201 | tls_client_stapling_cb(SSL *s, void *arg) | |
202 | { | |
203 | const unsigned char *p; | |
204 | int len; | |
205 | OCSP_RESPONSE *rsp; | |
206 | OCSP_BASICRESP *bs; | |
ee5b1e28 | 207 | STACK_OF(X509) * sk; |
f5d78688 JH |
208 | int ret = 1; |
209 | ||
210 | len = SSL_get_tlsext_status_ocsp_resp(s, &p); | |
211 | /*BIO_printf(arg, "OCSP response: ");*/ | |
212 | if (!p) | |
213 | { | |
214 | BIO_printf(arg, "no response received\n"); | |
215 | return 1; | |
216 | } | |
217 | if(!(rsp = d2i_OCSP_RESPONSE(NULL, &p, len))) | |
218 | { | |
219 | BIO_printf(arg, "response parse error\n"); | |
220 | BIO_dump_indent(arg, (char *)p, len, 4); | |
221 | return 0; | |
222 | } | |
223 | if(!(bs = OCSP_response_get1_basic(rsp))) | |
224 | { | |
225 | BIO_printf(arg, "error parsing response\n"); | |
226 | return 0; | |
227 | } | |
228 | ||
ee5b1e28 | 229 | |
f1a49684 | 230 | if (!(sk = chain_from_pem_file((const uschar *)ocsp_stapling))) |
f5d78688 JH |
231 | { |
232 | BIO_printf(arg, "error in cert setup\n"); | |
233 | return 0; | |
234 | } | |
235 | ||
ee5b1e28 JH |
236 | /* OCSP_basic_verify takes a "store" arg, but does not |
237 | use it for the chain verification, which is all we do | |
238 | when OCSP_NOVERIFY is set. The content from the wire | |
239 | (in "bs") and a cert-stack "sk" are all that is used. */ | |
240 | ||
241 | if(OCSP_basic_verify(bs, sk, NULL, OCSP_NOVERIFY) <= 0) | |
f5d78688 JH |
242 | { |
243 | BIO_printf(arg, "Response Verify Failure\n"); | |
244 | ERR_print_errors(arg); | |
245 | ret = 0; | |
246 | } | |
247 | else | |
248 | BIO_printf(arg, "Response verify OK\n"); | |
249 | ||
ee5b1e28 | 250 | cert_stack_free(sk); |
f5d78688 JH |
251 | return ret; |
252 | } | |
3b3634d0 | 253 | # endif /*DISABLE_OCSP*/ |
f5d78688 JH |
254 | |
255 | ||
c55a77db PH |
256 | /************************************************* |
257 | * Start an OpenSSL TLS session * | |
258 | *************************************************/ | |
259 | ||
2b4a568d JH |
260 | int |
261 | tls_start(int sock, SSL **ssl, SSL_CTX *ctx) | |
c55a77db PH |
262 | { |
263 | int rc; | |
57cde6e4 | 264 | static const unsigned char *sid_ctx = US"exim"; |
c55a77db PH |
265 | |
266 | RAND_load_file("client.c", -1); /* Not *very* random! */ | |
267 | ||
268 | *ssl = SSL_new (ctx); | |
57cde6e4 | 269 | SSL_set_session_id_context(*ssl, sid_ctx, strlen(CS sid_ctx)); |
c55a77db PH |
270 | SSL_set_fd (*ssl, sock); |
271 | SSL_set_connect_state(*ssl); | |
272 | ||
6d68e1c7 | 273 | #ifndef DISABLE_OCSP |
f5d78688 JH |
274 | if (ocsp_stapling) |
275 | { | |
276 | SSL_CTX_set_tlsext_status_cb(ctx, tls_client_stapling_cb); | |
277 | SSL_CTX_set_tlsext_status_arg(ctx, BIO_new_fp(stdout, BIO_NOCLOSE)); | |
278 | SSL_set_tlsext_status_type(*ssl, TLSEXT_STATUSTYPE_ocsp); | |
279 | } | |
6d68e1c7 | 280 | #endif |
f5d78688 | 281 | |
c55a77db PH |
282 | signal(SIGALRM, sigalrm_handler_flag); |
283 | sigalrm_seen = 0; | |
284 | alarm(5); | |
285 | rc = SSL_connect (*ssl); | |
286 | alarm(0); | |
287 | ||
288 | if (sigalrm_seen) | |
289 | { | |
290 | printf("SSL_connect timed out\n"); | |
291 | return 0; | |
292 | } | |
293 | ||
294 | if (rc <= 0) | |
295 | { | |
296 | ERR_print_errors_fp(stdout); | |
297 | return 0; | |
298 | } | |
299 | ||
300 | printf("SSL connection using %s\n", SSL_get_cipher (*ssl)); | |
301 | return 1; | |
302 | } | |
303 | ||
304 | ||
305 | /************************************************* | |
306 | * SSL Information callback * | |
307 | *************************************************/ | |
308 | ||
309 | static void | |
310 | info_callback(SSL *s, int where, int ret) | |
311 | { | |
312 | where = where; | |
313 | ret = ret; | |
314 | printf("SSL info: %s\n", SSL_state_string_long(s)); | |
315 | } | |
316 | #endif | |
317 | ||
318 | ||
319 | /****************************************************************************/ | |
320 | /****************************************************************************/ | |
321 | ||
322 | ||
323 | #ifdef HAVE_GNUTLS | |
324 | /************************************************* | |
325 | * Handle GnuTLS error * | |
326 | *************************************************/ | |
327 | ||
328 | /* Called from lots of places when errors occur before actually starting to do | |
329 | the TLS handshake, that is, while the session is still in clear. | |
330 | ||
331 | Argument: | |
332 | prefix prefix text | |
333 | err a GnuTLS error number, or 0 if local error | |
334 | ||
335 | Returns: doesn't - it dies | |
336 | */ | |
337 | ||
338 | static void | |
339 | gnutls_error(uschar *prefix, int err) | |
340 | { | |
bb727765 | 341 | fprintf(stderr, "GnuTLS connection error: %s:", prefix); |
c55a77db PH |
342 | if (err != 0) fprintf(stderr, " %s", gnutls_strerror(err)); |
343 | fprintf(stderr, "\n"); | |
9ff403f8 | 344 | exit(98); |
c55a77db PH |
345 | } |
346 | ||
347 | ||
348 | ||
349 | /************************************************* | |
bb727765 | 350 | * Setup up DH parameters * |
c55a77db PH |
351 | *************************************************/ |
352 | ||
353 | /* For the test suite, the parameters should always be available in the spool | |
354 | directory. */ | |
355 | ||
356 | static void | |
bb727765 | 357 | init_dh(void) |
c55a77db PH |
358 | { |
359 | int fd; | |
360 | int ret; | |
fc4fcc34 | 361 | gnutls_datum_t m; |
c55a77db PH |
362 | uschar filename[200]; |
363 | struct stat statbuf; | |
364 | ||
365 | /* Initialize the data structures for holding the parameters */ | |
366 | ||
c55a77db PH |
367 | ret = gnutls_dh_params_init(&dh_params); |
368 | if (ret < 0) gnutls_error(US"init dh_params", ret); | |
369 | ||
370 | /* Open the cache file for reading and if successful, read it and set up the | |
bb727765 | 371 | parameters. */ |
c55a77db PH |
372 | |
373 | fd = open("aux-fixed/gnutls-params", O_RDONLY, 0); | |
374 | if (fd < 0) | |
375 | { | |
376 | fprintf(stderr, "Failed to open spool/gnutls-params: %s\n", strerror(errno)); | |
9ff403f8 | 377 | exit(97); |
c55a77db PH |
378 | } |
379 | ||
380 | if (fstat(fd, &statbuf) < 0) | |
381 | { | |
382 | (void)close(fd); | |
383 | return gnutls_error(US"TLS cache stat failed", 0); | |
384 | } | |
385 | ||
386 | m.size = statbuf.st_size; | |
387 | m.data = malloc(m.size); | |
388 | if (m.data == NULL) | |
389 | return gnutls_error(US"memory allocation failed", 0); | |
390 | if (read(fd, m.data, m.size) != m.size) | |
391 | return gnutls_error(US"TLS cache read failed", 0); | |
392 | (void)close(fd); | |
393 | ||
c55a77db PH |
394 | ret = gnutls_dh_params_import_pkcs3(dh_params, &m, GNUTLS_X509_FMT_PEM); |
395 | if (ret < 0) return gnutls_error(US"DH params import", ret); | |
396 | free(m.data); | |
397 | } | |
398 | ||
399 | ||
400 | ||
401 | ||
402 | /************************************************* | |
403 | * Initialize for GnuTLS * | |
404 | *************************************************/ | |
405 | ||
406 | /* | |
407 | Arguments: | |
408 | certificate certificate file | |
409 | privatekey private key file | |
410 | */ | |
411 | ||
412 | static void | |
413 | tls_init(uschar *certificate, uschar *privatekey) | |
414 | { | |
415 | int rc; | |
416 | ||
417 | rc = gnutls_global_init(); | |
418 | if (rc < 0) gnutls_error(US"gnutls_global_init", rc); | |
419 | ||
bb727765 | 420 | /* Read D-H parameters from the cache file. */ |
c55a77db | 421 | |
bb727765 | 422 | init_dh(); |
c55a77db PH |
423 | |
424 | /* Create the credentials structure */ | |
425 | ||
426 | rc = gnutls_certificate_allocate_credentials(&x509_cred); | |
427 | if (rc < 0) gnutls_error(US"certificate_allocate_credentials", rc); | |
428 | ||
429 | /* Set the certificate and private keys */ | |
430 | ||
431 | if (certificate != NULL) | |
432 | { | |
433 | rc = gnutls_certificate_set_x509_key_file(x509_cred, CS certificate, | |
434 | CS privatekey, GNUTLS_X509_FMT_PEM); | |
059f2ace | 435 | if (rc < 0) gnutls_error(US"gnutls_certificate", rc); |
c55a77db PH |
436 | } |
437 | ||
438 | /* Associate the parameters with the x509 credentials structure. */ | |
439 | ||
440 | gnutls_certificate_set_dh_params(x509_cred, dh_params); | |
2b4a568d JH |
441 | |
442 | /* set the CA info for server-cert verify */ | |
443 | if (ocsp_stapling) | |
444 | gnutls_certificate_set_x509_trust_file(x509_cred, ocsp_stapling, | |
445 | GNUTLS_X509_FMT_PEM); | |
c55a77db PH |
446 | } |
447 | ||
448 | ||
449 | ||
450 | /************************************************* | |
451 | * Initialize a single GNUTLS session * | |
452 | *************************************************/ | |
453 | ||
fc4fcc34 | 454 | static gnutls_session_t |
c55a77db PH |
455 | tls_session_init(void) |
456 | { | |
fc4fcc34 | 457 | gnutls_session_t session; |
c55a77db | 458 | |
0886a95e | 459 | gnutls_init(&session, GNUTLS_CLIENT | GNUTLS_NO_EXTENSIONS); |
c55a77db | 460 | |
ba86e143 | 461 | # if GNUTLS_VERSION_NUMBER < 0x030400 |
c55a77db PH |
462 | gnutls_cipher_set_priority(session, default_cipher_priority); |
463 | gnutls_compression_set_priority(session, comp_priority); | |
464 | gnutls_kx_set_priority(session, kx_priority); | |
465 | gnutls_protocol_set_priority(session, protocol_priority); | |
466 | gnutls_mac_set_priority(session, mac_priority); | |
467 | ||
468 | gnutls_cred_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); | |
ba86e143 JH |
469 | # else |
470 | if (pri_string) | |
471 | { | |
472 | gnutls_priority_t priority_cache; | |
473 | const char * errpos; | |
474 | ||
475 | gnutls_priority_init(&priority_cache, pri_string, &errpos); | |
476 | gnutls_priority_set(session, priority_cache); | |
477 | } | |
478 | else | |
479 | gnutls_set_default_priority(session); | |
fc4fcc34 | 480 | gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); |
ba86e143 | 481 | # endif |
c55a77db PH |
482 | |
483 | gnutls_dh_set_prime_bits(session, DH_BITS); | |
484 | gnutls_db_set_cache_expiration(session, ssl_session_timeout); | |
485 | ||
486 | return session; | |
487 | } | |
488 | #endif | |
489 | ||
490 | ||
491 | /****************************************************************************/ | |
5d036699 JH |
492 | /* Turn "\n" and "\r" into the relevant characters. This is a hack. */ |
493 | ||
494 | static int | |
495 | unescape_buf(unsigned char * buf, int len) | |
496 | { | |
497 | unsigned char * s; | |
498 | unsigned char c, t; | |
499 | unsigned shift; | |
500 | ||
501 | for (s = buf; s < buf+len; s++) if (*s == '\\') | |
502 | { | |
503 | switch (s[1]) | |
504 | { | |
505 | default: c = s[1]; shift = 1; break; | |
506 | case 'n': c = '\n'; shift = 1; break; | |
507 | case 'r': c = '\r'; shift = 1; break; | |
508 | case 'x': | |
509 | t = s[2]; | |
510 | if (t >= 'A' && t <= 'F') t -= 'A'-'9'-1; | |
511 | else if (t >= 'a' && t <= 'f') t -= 'a'-'9'-1; | |
512 | t -= '0'; | |
513 | c = (t<<4) & 0xf0; | |
514 | t = s[3]; | |
515 | if (t >= 'A' && t <= 'F') t -= 'A'-'9'-1; | |
516 | else if (t >= 'a' && t <= 'f') t -= 'a'-'9'-1; | |
517 | t -= '0'; | |
518 | c |= t & 0xf; | |
519 | shift = 3; | |
520 | break; | |
521 | } | |
522 | *s = c; | |
523 | memmove(s+1, s+shift+1, len-shift); | |
524 | len -= shift; | |
525 | } | |
526 | return len; | |
527 | } | |
528 | ||
529 | ||
c55a77db | 530 | /****************************************************************************/ |
7bbb3621 JH |
531 | typedef struct { |
532 | int sock; | |
533 | int tls_active; | |
534 | #ifdef HAVE_OPENSSL | |
535 | SSL_CTX * ctx; | |
536 | SSL * ssl; | |
537 | #endif | |
538 | int sent_starttls; | |
539 | } srv_ctx; | |
540 | ||
541 | static void | |
542 | do_file(srv_ctx * srv, FILE * f, int timeout, | |
543 | unsigned char * inbuffer, unsigned bsiz, unsigned char * inptr) | |
544 | { | |
b9df1829 | 545 | unsigned char outbuffer[1024 * 20]; |
7bbb3621 JH |
546 | |
547 | while (fgets(CS outbuffer, sizeof(outbuffer), f) != NULL) | |
548 | { | |
549 | int n = (int)strlen(CS outbuffer); | |
550 | int crlf = 1; | |
551 | int rc; | |
552 | ||
553 | /* Strip trailing newline */ | |
554 | if (outbuffer[n-1] == '\n') outbuffer[--n] = 0; | |
555 | ||
556 | /* Expect incoming */ | |
557 | ||
558 | if ( strncmp(CS outbuffer, "???", 3) == 0 | |
ce80533b | 559 | && (outbuffer[3] == ' ' || outbuffer[3] == '*' || outbuffer[3] == '?') |
7bbb3621 JH |
560 | ) |
561 | { | |
562 | unsigned char *lineptr; | |
563 | unsigned exp_eof = outbuffer[3] == '*'; | |
ce80533b | 564 | unsigned resp_optional = outbuffer[3] == '?'; |
7bbb3621 JH |
565 | |
566 | printf("%s\n", outbuffer); | |
567 | n = unescape_buf(outbuffer, n); | |
568 | ||
ce80533b | 569 | nextinput: |
7bbb3621 JH |
570 | if (*inptr == 0) /* Refill input buffer */ |
571 | { | |
bb71a66f | 572 | unsigned char *inbufferp = inbuffer; |
9b62f401 JH |
573 | |
574 | alarm(timeout); | |
575 | for (;;) | |
576 | { | |
577 | if (srv->tls_active) | |
578 | { | |
5dcadbf4 | 579 | #ifdef HAVE_OPENSSL |
9b62f401 JH |
580 | int error; |
581 | DEBUG { printf("call SSL_read\n"); fflush(stdout); } | |
582 | rc = SSL_read(srv->ssl, inbufferp, bsiz - (inbufferp - inbuffer) - 1); | |
583 | DEBUG { printf("SSL_read: %d\n", rc); fflush(stdout); } | |
584 | if (rc <= 0) | |
585 | switch (error = SSL_get_error(srv->ssl, rc)) | |
586 | { | |
587 | case SSL_ERROR_ZERO_RETURN: | |
588 | break; | |
589 | case SSL_ERROR_SYSCALL: | |
590 | printf("%s\n", ERR_error_string(ERR_get_error(), NULL)); | |
591 | rc = -1; | |
592 | break; | |
593 | case SSL_ERROR_SSL: | |
594 | printf("%s\nTLS terminated\n", ERR_error_string(ERR_get_error(), NULL)); | |
595 | SSL_shutdown(srv->ssl); | |
596 | SSL_free(srv->ssl); | |
597 | srv->tls_active = FALSE; | |
598 | { /* OpenSSL leaves it in restartsys mode */ | |
599 | struct sigaction act = {.sa_handler = sigalrm_handler_flag, .sa_flags = 0}; | |
600 | sigalrm_seen = 1; | |
601 | sigaction(SIGALRM, &act, NULL); | |
602 | } | |
603 | *inptr = 0; | |
604 | DEBUG { printf("go round\n"); fflush(stdout); } | |
605 | goto nextinput; | |
606 | default: | |
607 | printf("SSL error code %d\n", error); | |
fd3cf789 | 608 | } |
5dcadbf4 JH |
609 | #endif |
610 | #ifdef HAVE_GNUTLS | |
9b62f401 JH |
611 | retry1: |
612 | DEBUG { printf("call gnutls_record_recv\n"); fflush(stdout); } | |
613 | rc = gnutls_record_recv(tls_session, CS inbufferp, bsiz - (inbufferp - inbuffer) - 1); | |
614 | if (rc < 0) | |
615 | { | |
616 | DEBUG { printf("gnutls_record_recv: %s\n", gnutls_strerror(rc)); fflush(stdout); } | |
617 | if (rc == GNUTLS_E_INTERRUPTED || rc == GNUTLS_E_AGAIN) | |
618 | goto retry1; | |
619 | printf("%s\n", gnutls_strerror(rc)); | |
620 | srv->tls_active = FALSE; | |
621 | *inptr = 0; | |
622 | DEBUG { printf("go round\n"); fflush(stdout); } | |
623 | goto nextinput; | |
624 | } | |
625 | DEBUG { printf("gnutls_record_recv: %d\n", rc); fflush(stdout); } | |
626 | #endif | |
627 | } | |
628 | else | |
b2ba9267 | 629 | { |
9b62f401 JH |
630 | DEBUG { printf("call read\n"); fflush(stdout); } |
631 | rc = read(srv->sock, inbufferp, bsiz - (inbufferp - inbuffer) - 1); | |
632 | DEBUG { printf("read: %d\n", rc); fflush(stdout); } | |
b2ba9267 | 633 | } |
bb71a66f | 634 | |
9b62f401 JH |
635 | if (rc > 0) inbufferp[rc] = '\0'; |
636 | if (rc <= 0 || strchr(inbufferp, '\n')) break; | |
637 | inbufferp += rc; | |
638 | if (inbufferp >= inbuffer + bsiz) | |
639 | { | |
640 | printf("Input buffer overrun, need more than %d bytes input buffer\n", bsiz); | |
641 | exit(73); | |
642 | } | |
643 | DEBUG { printf("read more\n"); } | |
644 | } | |
ce80533b | 645 | alarm(0); |
7bbb3621 JH |
646 | |
647 | if (rc < 0) | |
648 | { | |
fd3cf789 JH |
649 | if (errno == EINTR && sigalrm_seen && resp_optional) |
650 | continue; /* next scriptline */ | |
b2ba9267 | 651 | printf("Read error: %s\n", strerror(errno)); |
7bbb3621 JH |
652 | exit(81); |
653 | } | |
654 | else if (rc == 0) | |
655 | if (exp_eof) | |
656 | { | |
657 | printf("Expected EOF read\n"); | |
658 | continue; | |
659 | } | |
5dcadbf4 JH |
660 | else if (resp_optional) |
661 | continue; /* next scriptline */ | |
7bbb3621 JH |
662 | else |
663 | { | |
664 | printf("Unexpected EOF read\n"); | |
665 | close(srv->sock); | |
666 | exit(80); | |
667 | } | |
668 | else if (exp_eof) | |
669 | { | |
670 | printf("Expected EOF not read\n"); | |
671 | close(srv->sock); | |
672 | exit(74); | |
673 | } | |
674 | else | |
7bbb3621 | 675 | inptr = inbuffer; |
7bbb3621 | 676 | } |
90788405 | 677 | DEBUG { printf("read: '%s'\n", inptr); fflush(stdout); } |
7bbb3621 JH |
678 | |
679 | lineptr = inptr; | |
680 | while (*inptr != 0 && *inptr != '\r' && *inptr != '\n') inptr++; | |
681 | if (*inptr != 0) | |
682 | { | |
683 | *inptr++ = 0; | |
684 | if (*inptr == '\n') inptr++; | |
685 | } | |
686 | ||
7bbb3621 | 687 | if (strncmp(CS lineptr, CS outbuffer + 4, n - 4) != 0) |
ce80533b JH |
688 | if (resp_optional) |
689 | { | |
690 | inptr = lineptr; /* consume scriptline, not inputline */ | |
691 | continue; | |
692 | } | |
693 | else | |
694 | { | |
695 | printf("<<< %s\n", lineptr); | |
696 | printf("\n******** Input mismatch ********\n"); | |
697 | exit(79); | |
698 | } | |
699 | ||
90788405 JH |
700 | /* Input matched script. Output the inputline, unless optional */ |
701 | DEBUG { printf("read matched\n"); fflush(stdout); } | |
702 | ||
703 | if (!resp_optional) | |
704 | printf("<<< %s\n", lineptr); | |
705 | else | |
ce80533b | 706 | |
90788405 JH |
707 | /* If there is further input after this line, consume inputline but not |
708 | scriptline in case there are several matching. Nonmatches are dealt with | |
709 | above. */ | |
ce80533b | 710 | |
90788405 JH |
711 | if (*inptr != 0) |
712 | goto nextinput; | |
7bbb3621 JH |
713 | |
714 | #ifdef HAVE_TLS | |
715 | if (srv->sent_starttls) | |
716 | { | |
717 | if (lineptr[0] == '2') | |
718 | { | |
7bbb3621 JH |
719 | unsigned int verify; |
720 | ||
721 | printf("Attempting to start TLS\n"); | |
722 | fflush(stdout); | |
723 | ||
724 | #ifdef HAVE_OPENSSL | |
725 | srv->tls_active = tls_start(srv->sock, &srv->ssl, srv->ctx); | |
726 | #endif | |
727 | ||
728 | #ifdef HAVE_GNUTLS | |
729 | { | |
730 | int rc; | |
b2ba9267 JH |
731 | fd_set rfd; |
732 | struct timeval tv = { 0, 2000 }; | |
733 | ||
7bbb3621 JH |
734 | sigalrm_seen = FALSE; |
735 | alarm(timeout); | |
736 | do { | |
737 | rc = gnutls_handshake(tls_session); | |
738 | } while (rc < 0 && gnutls_error_is_fatal(rc) == 0); | |
739 | srv->tls_active = rc >= 0; | |
740 | alarm(0); | |
741 | ||
742 | if (!srv->tls_active) printf("%s\n", gnutls_strerror(rc)); | |
b2ba9267 JH |
743 | |
744 | /* look for an error on the TLS conn */ | |
745 | FD_ZERO(&rfd); | |
746 | FD_SET(srv->sock, &rfd); | |
747 | if (select(srv->sock+1, &rfd, NULL, NULL, &tv) > 0) | |
748 | { | |
749 | retry2: | |
750 | DEBUG { printf("call gnutls_record_recv\n"); fflush(stdout); } | |
751 | rc = gnutls_record_recv(tls_session, CS inbuffer, bsiz - 1); | |
752 | if (rc < 0) | |
753 | { | |
754 | DEBUG { printf("gnutls_record_recv: %s\n", gnutls_strerror(rc)); fflush(stdout); } | |
755 | if (rc == GNUTLS_E_INTERRUPTED || rc == GNUTLS_E_AGAIN) | |
756 | goto retry2; | |
757 | printf("%s\n", gnutls_strerror(rc)); | |
758 | srv->tls_active = FALSE; | |
759 | } | |
760 | DEBUG { printf("gnutls_record_recv: %d\n", rc); fflush(stdout); } | |
761 | } | |
7bbb3621 JH |
762 | } |
763 | #endif | |
764 | ||
765 | if (!srv->tls_active) | |
766 | { | |
767 | printf("Failed to start TLS\n"); | |
768 | fflush(stdout); | |
769 | } | |
770 | #ifdef HAVE_GNUTLS | |
771 | else if (ocsp_stapling) | |
772 | { | |
773 | if ((rc= gnutls_certificate_verify_peers2(tls_session, &verify)) < 0) | |
774 | { | |
775 | printf("Failed to verify certificate: %s\n", gnutls_strerror(rc)); | |
776 | fflush(stdout); | |
777 | } | |
778 | else if (verify & (GNUTLS_CERT_INVALID|GNUTLS_CERT_REVOKED)) | |
779 | { | |
780 | printf("Bad certificate\n"); | |
781 | fflush(stdout); | |
782 | } | |
783 | #ifdef HAVE_OCSP | |
784 | else if (gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) | |
785 | { | |
786 | printf("Failed to verify certificate status\n"); | |
787 | { | |
788 | gnutls_datum_t stapling; | |
789 | gnutls_ocsp_resp_t resp; | |
790 | gnutls_datum_t printed; | |
791 | if ( (rc= gnutls_ocsp_status_request_get(tls_session, &stapling)) == 0 | |
792 | && (rc= gnutls_ocsp_resp_init(&resp)) == 0 | |
793 | && (rc= gnutls_ocsp_resp_import(resp, &stapling)) == 0 | |
794 | && (rc= gnutls_ocsp_resp_print(resp, GNUTLS_OCSP_PRINT_FULL, &printed)) == 0 | |
795 | ) | |
796 | { | |
797 | fprintf(stderr, "%.4096s", printed.data); | |
798 | gnutls_free(printed.data); | |
799 | } | |
800 | else | |
801 | (void) fprintf(stderr,"ocsp decode: %s", gnutls_strerror(rc)); | |
802 | } | |
803 | fflush(stdout); | |
804 | } | |
805 | #endif | |
806 | } | |
807 | #endif | |
808 | else | |
809 | printf("Succeeded in starting TLS\n"); | |
810 | } | |
811 | else printf("Abandoning TLS start attempt\n"); | |
812 | } | |
813 | srv->sent_starttls = 0; | |
814 | #endif | |
815 | } | |
816 | ||
817 | /* Wait for a bit before proceeding */ | |
818 | ||
819 | else if (strncmp(CS outbuffer, "+++ ", 4) == 0) | |
820 | { | |
821 | printf("%s\n", outbuffer); | |
822 | sleep(atoi(CS outbuffer + 4)); | |
823 | } | |
824 | ||
825 | /* Stack new input file */ | |
826 | ||
827 | else if (strncmp(CS outbuffer, "<<< ", 4) == 0) | |
828 | { | |
829 | FILE * new_f; | |
f1a49684 | 830 | if (!(new_f = fopen((const char *)outbuffer+4 , "r"))) |
7bbb3621 | 831 | { |
768e8b5b | 832 | printf("Unable to open '%s': %s", inptr, strerror(errno)); |
7bbb3621 JH |
833 | exit(74); |
834 | } | |
835 | do_file(srv, new_f, timeout, inbuffer, bsiz, inptr); | |
836 | } | |
837 | ||
838 | ||
839 | /* Send line outgoing, but barf if unconsumed incoming */ | |
840 | ||
841 | else | |
842 | { | |
843 | unsigned char * out = outbuffer; | |
844 | ||
845 | if (strncmp(CS outbuffer, ">>> ", 4) == 0) | |
846 | { | |
847 | crlf = 0; | |
848 | out += 4; | |
849 | n -= 4; | |
850 | } | |
851 | ||
852 | if (*inptr != 0) | |
853 | { | |
854 | printf("Unconsumed input: %s", inptr); | |
855 | printf(" About to send: %s\n", out); | |
856 | exit(78); | |
857 | } | |
858 | ||
859 | #ifdef HAVE_TLS | |
860 | ||
861 | /* Shutdown TLS */ | |
862 | ||
863 | if (strcmp(CS out, "stoptls") == 0 || | |
864 | strcmp(CS out, "STOPTLS") == 0) | |
865 | { | |
866 | if (!srv->tls_active) | |
867 | { | |
868 | printf("STOPTLS read when TLS not active\n"); | |
869 | exit(77); | |
870 | } | |
871 | printf("Shutting down TLS encryption\n"); | |
872 | ||
873 | #ifdef HAVE_OPENSSL | |
874 | SSL_shutdown(srv->ssl); | |
875 | SSL_free(srv->ssl); | |
876 | #endif | |
877 | ||
878 | #ifdef HAVE_GNUTLS | |
879 | gnutls_bye(tls_session, GNUTLS_SHUT_WR); | |
880 | gnutls_deinit(tls_session); | |
881 | tls_session = NULL; | |
882 | gnutls_global_deinit(); | |
883 | #endif | |
884 | ||
885 | srv->tls_active = 0; | |
886 | continue; | |
887 | } | |
888 | ||
889 | /* Remember that we sent STARTTLS */ | |
890 | ||
891 | srv->sent_starttls = (strcmp(CS out, "starttls") == 0 || | |
892 | strcmp(CS out, "STARTTLS") == 0); | |
893 | ||
894 | /* Fudge: if the command is "starttls_wait", we send the starttls bit, | |
895 | but we haven't set the flag, so that there is no negotiation. This is for | |
896 | testing the server's timeout. */ | |
897 | ||
898 | if (strcmp(CS out, "starttls_wait") == 0) | |
899 | { | |
900 | out[8] = 0; | |
901 | n = 8; | |
902 | } | |
903 | #endif | |
904 | ||
905 | printf(">>> %s\n", out); | |
906 | if (crlf) | |
907 | { | |
908 | strcpy(CS out + n, "\r\n"); | |
909 | n += 2; | |
910 | } | |
911 | ||
912 | n = unescape_buf(out, n); | |
913 | ||
914 | /* OK, do it */ | |
915 | ||
916 | alarm(timeout); | |
917 | if (srv->tls_active) | |
918 | { | |
919 | #ifdef HAVE_OPENSSL | |
920 | rc = SSL_write (srv->ssl, out, n); | |
921 | #endif | |
922 | #ifdef HAVE_GNUTLS | |
923 | if ((rc = gnutls_record_send(tls_session, CS out, n)) < 0) | |
924 | { | |
925 | printf("GnuTLS write error: %s\n", gnutls_strerror(rc)); | |
926 | exit(76); | |
927 | } | |
928 | #endif | |
929 | } | |
930 | else | |
931 | rc = write(srv->sock, out, n); | |
932 | alarm(0); | |
933 | ||
934 | if (rc < 0) | |
935 | { | |
936 | printf("Write error: %s\n", strerror(errno)); | |
937 | exit(75); | |
938 | } | |
939 | } | |
940 | } | |
941 | } | |
c55a77db PH |
942 | |
943 | ||
944 | ||
945 | ||
946 | /************************************************* | |
947 | * Main Program * | |
948 | *************************************************/ | |
949 | ||
4fe99a6c | 950 | const char * const HELP_MESSAGE = "\n\ |
972e83f5 HSHR |
951 | Usage: client\n" |
952 | #ifdef HAVE_TLS | |
953 | "\ | |
954 | [-tls-on-connect]\n\ | |
955 | [-ocsp]\n" | |
ba86e143 JH |
956 | # ifdef HAVE_GNUTLS |
957 | "\ | |
958 | [-p priority-string]\n" | |
959 | # endif | |
972e83f5 HSHR |
960 | #endif |
961 | "\ | |
962 | [-tn] n seconds timeout\n\ | |
4fe99a6c PP |
963 | <IP address>\n\ |
964 | <port>\n\ | |
965 | [<outgoing interface>]\n\ | |
966 | [<cert file>]\n\ | |
967 | [<key file>]\n\ | |
968 | \n"; | |
c55a77db | 969 | |
5d036699 JH |
970 | int |
971 | main(int argc, char **argv) | |
c55a77db PH |
972 | { |
973 | struct sockaddr *s_ptr; | |
974 | struct sockaddr_in s_in4; | |
975 | char *interface = NULL; | |
976 | char *address = NULL; | |
977 | char *certfile = NULL; | |
978 | char *keyfile = NULL; | |
1ec3f27d | 979 | char *end = NULL; |
c55a77db | 980 | int argi = 1; |
7bbb3621 | 981 | int host_af, port, s_len, rc, save_errno; |
d528a389 | 982 | int timeout = 5; |
c55a77db | 983 | int tls_on_connect = 0; |
1ec3f27d | 984 | long tmplong; |
c55a77db PH |
985 | |
986 | #if HAVE_IPV6 | |
987 | struct sockaddr_in6 s_in6; | |
988 | #endif | |
989 | ||
7bbb3621 | 990 | srv_ctx srv; |
c55a77db | 991 | |
bb71a66f | 992 | unsigned char inbuffer[100 * 1024]; |
c55a77db PH |
993 | unsigned char *inptr = inbuffer; |
994 | ||
995 | *inptr = 0; /* Buffer empty */ | |
7bbb3621 JH |
996 | srv.tls_active = 0; |
997 | srv.sent_starttls = 0; | |
c55a77db PH |
998 | |
999 | /* Options */ | |
1000 | ||
1001 | while (argc >= argi + 1 && argv[argi][0] == '-') | |
1002 | { | |
4fe99a6c PP |
1003 | if (strcmp(argv[argi], "-help") == 0 || |
1004 | strcmp(argv[argi], "--help") == 0 || | |
1005 | strcmp(argv[argi], "-h") == 0) | |
1006 | { | |
dd4c8678 | 1007 | puts(HELP_MESSAGE); |
4fe99a6c PP |
1008 | exit(0); |
1009 | } | |
c55a77db PH |
1010 | if (strcmp(argv[argi], "-tls-on-connect") == 0) |
1011 | { | |
1012 | tls_on_connect = 1; | |
1013 | argi++; | |
1014 | } | |
2b4a568d | 1015 | #ifdef HAVE_TLS |
f5d78688 JH |
1016 | else if (strcmp(argv[argi], "-ocsp") == 0) |
1017 | { | |
1018 | if (argc < ++argi + 1) | |
1019 | { | |
1020 | fprintf(stderr, "Missing required certificate file for ocsp option\n"); | |
9ff403f8 | 1021 | exit(96); |
f5d78688 JH |
1022 | } |
1023 | ocsp_stapling = argv[argi++]; | |
1024 | } | |
ba86e143 JH |
1025 | # ifdef HAVE_GNUTLS |
1026 | else if (strcmp(argv[argi], "-p") == 0) | |
1027 | { | |
1028 | if (argc < ++argi + 1) | |
1029 | { | |
1030 | fprintf(stderr, "Missing priority string\n"); | |
1031 | exit(96); | |
1032 | } | |
1033 | pri_string = argv[argi++]; | |
1034 | } | |
1035 | #endif | |
2b4a568d | 1036 | |
f5d78688 | 1037 | #endif |
c55a77db PH |
1038 | else if (argv[argi][1] == 't' && isdigit(argv[argi][2])) |
1039 | { | |
1ec3f27d PP |
1040 | tmplong = strtol(argv[argi]+2, &end, 10); |
1041 | if (end == argv[argi]+2 || *end) | |
1042 | { | |
1043 | fprintf(stderr, "Failed to parse seconds from option <%s>\n", | |
1044 | argv[argi]); | |
9ff403f8 | 1045 | exit(95); |
1ec3f27d PP |
1046 | } |
1047 | if (tmplong > 10000L) | |
1048 | { | |
dd4c8678 | 1049 | fprintf(stderr, "Unreasonably long wait of %ld seconds requested\n", |
1ec3f27d | 1050 | tmplong); |
9ff403f8 | 1051 | exit(94); |
1ec3f27d PP |
1052 | } |
1053 | if (tmplong < 0L) | |
1054 | { | |
dd4c8678 | 1055 | fprintf(stderr, "Timeout must not be negative (%ld)\n", tmplong); |
9ff403f8 | 1056 | exit(93); |
1ec3f27d PP |
1057 | } |
1058 | timeout = (int) tmplong; | |
c55a77db PH |
1059 | argi++; |
1060 | } | |
1061 | else | |
1062 | { | |
1ec3f27d | 1063 | fprintf(stderr, "Unrecognized option %s\n", argv[argi]); |
9ff403f8 | 1064 | exit(92); |
c55a77db PH |
1065 | } |
1066 | } | |
1067 | ||
1068 | /* Mandatory 1st arg is IP address */ | |
1069 | ||
1070 | if (argc < argi+1) | |
1071 | { | |
1ec3f27d | 1072 | fprintf(stderr, "No IP address given\n"); |
9ff403f8 | 1073 | exit(91); |
c55a77db PH |
1074 | } |
1075 | ||
1076 | address = argv[argi++]; | |
1077 | host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET; | |
1078 | ||
1079 | /* Mandatory 2nd arg is port */ | |
1080 | ||
1081 | if (argc < argi+1) | |
1082 | { | |
1ec3f27d | 1083 | fprintf(stderr, "No port number given\n"); |
9ff403f8 | 1084 | exit(90); |
c55a77db PH |
1085 | } |
1086 | ||
1087 | port = atoi(argv[argi++]); | |
1088 | ||
1089 | /* Optional next arg is interface */ | |
1090 | ||
1091 | if (argc > argi && | |
1092 | (isdigit((unsigned char)argv[argi][0]) || argv[argi][0] == ':')) | |
1093 | interface = argv[argi++]; | |
1094 | ||
1095 | /* Any more arguments are the name of a certificate file and key file */ | |
1096 | ||
1097 | if (argc > argi) certfile = argv[argi++]; | |
1098 | if (argc > argi) keyfile = argv[argi++]; | |
1099 | ||
1100 | ||
1101 | #if HAVE_IPV6 | |
1102 | /* For an IPv6 address, use an IPv6 sockaddr structure. */ | |
1103 | ||
1104 | if (host_af == AF_INET6) | |
1105 | { | |
1106 | s_ptr = (struct sockaddr *)&s_in6; | |
1107 | s_len = sizeof(s_in6); | |
1108 | } | |
1109 | else | |
1110 | #endif | |
1111 | ||
1112 | /* For an IPv4 address, use an IPv4 sockaddr structure, | |
1113 | even on an IPv6 system. */ | |
1114 | ||
1115 | { | |
1116 | s_ptr = (struct sockaddr *)&s_in4; | |
1117 | s_len = sizeof(s_in4); | |
1118 | } | |
1119 | ||
1120 | printf("Connecting to %s port %d ... ", address, port); | |
1121 | ||
7bbb3621 JH |
1122 | srv.sock = socket(host_af, SOCK_STREAM, 0); |
1123 | if (srv.sock < 0) | |
c55a77db PH |
1124 | { |
1125 | printf("socket creation failed: %s\n", strerror(errno)); | |
9ff403f8 | 1126 | exit(89); |
c55a77db PH |
1127 | } |
1128 | ||
1129 | /* Bind to a specific interface if requested. On an IPv6 system, this has | |
1130 | to be of the same family as the address we are calling. On an IPv4 system the | |
1131 | test is redundant, but it keeps the code tidier. */ | |
1132 | ||
1133 | if (interface != NULL) | |
1134 | { | |
1135 | int interface_af = (strchr(interface, ':') != NULL)? AF_INET6 : AF_INET; | |
1136 | ||
1137 | if (interface_af == host_af) | |
1138 | { | |
1139 | #if HAVE_IPV6 | |
1140 | ||
1141 | /* Set up for IPv6 binding */ | |
1142 | ||
1143 | if (host_af == AF_INET6) | |
1144 | { | |
1145 | memset(&s_in6, 0, sizeof(s_in6)); | |
1146 | s_in6.sin6_family = AF_INET6; | |
1147 | s_in6.sin6_port = 0; | |
1148 | if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1) | |
1149 | { | |
1150 | printf("Unable to parse \"%s\"", interface); | |
9ff403f8 | 1151 | exit(88); |
c55a77db PH |
1152 | } |
1153 | } | |
1154 | else | |
1155 | #endif | |
1156 | ||
1157 | /* Set up for IPv4 binding */ | |
1158 | ||
1159 | { | |
1160 | memset(&s_in4, 0, sizeof(s_in4)); | |
1161 | s_in4.sin_family = AF_INET; | |
1162 | s_in4.sin_port = 0; | |
1163 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(interface); | |
1164 | } | |
1165 | ||
1166 | /* Bind */ | |
1167 | ||
7bbb3621 | 1168 | if (bind(srv.sock, s_ptr, s_len) < 0) |
c55a77db PH |
1169 | { |
1170 | printf("Unable to bind outgoing SMTP call to %s: %s", | |
1171 | interface, strerror(errno)); | |
9ff403f8 | 1172 | exit(87); |
c55a77db PH |
1173 | } |
1174 | } | |
1175 | } | |
1176 | ||
1177 | /* Set up a remote IPv6 address */ | |
1178 | ||
1179 | #if HAVE_IPV6 | |
1180 | if (host_af == AF_INET6) | |
1181 | { | |
40e3c5bf JH |
1182 | # ifdef HAVE_GETADDRINFO |
1183 | struct addrinfo hints, *res; | |
1184 | memset(&hints, 0, sizeof(hints)); | |
1185 | hints.ai_family = AF_INET6; | |
1186 | hints.ai_socktype = SOCK_STREAM; | |
1187 | hints.ai_flags = AI_NUMERICHOST; | |
1188 | if ((rc = getaddrinfo(address, NULL, &hints, &res)) != 0 || res == NULL) | |
1189 | { | |
1190 | printf("unable to parse \"%s\" as an IP address: %s\n", address, | |
1191 | rc == 0 ? "NULL result returned" : gai_strerror(rc)); | |
1192 | exit(86); | |
1193 | } | |
1194 | memcpy(&s_in6, res->ai_addr, res->ai_addrlen); | |
1195 | freeaddrinfo(res); | |
1196 | # else | |
c55a77db PH |
1197 | memset(&s_in6, 0, sizeof(s_in6)); |
1198 | s_in6.sin6_family = AF_INET6; | |
c55a77db PH |
1199 | if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1) |
1200 | { | |
1201 | printf("Unable to parse \"%s\"", address); | |
9ff403f8 | 1202 | exit(86); |
c55a77db | 1203 | } |
40e3c5bf JH |
1204 | # endif |
1205 | s_in6.sin6_port = htons(port); | |
c55a77db PH |
1206 | } |
1207 | else | |
1208 | #endif | |
1209 | ||
1210 | /* Set up a remote IPv4 address */ | |
1211 | ||
1212 | { | |
1213 | memset(&s_in4, 0, sizeof(s_in4)); | |
1214 | s_in4.sin_family = AF_INET; | |
1215 | s_in4.sin_port = htons(port); | |
1216 | s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(address); | |
1217 | } | |
1218 | ||
1219 | /* SIGALRM handler crashes out */ | |
1220 | ||
1221 | signal(SIGALRM, sigalrm_handler_crash); | |
1222 | alarm(timeout); | |
7bbb3621 | 1223 | rc = connect(srv.sock, s_ptr, s_len); |
c55a77db PH |
1224 | save_errno = errno; |
1225 | alarm(0); | |
1226 | ||
1227 | /* A failure whose error code is "Interrupted system call" is in fact | |
1228 | an externally applied timeout if the signal handler has been run. */ | |
1229 | ||
1230 | if (rc < 0) | |
1231 | { | |
7bbb3621 | 1232 | close(srv.sock); |
41fdef91 | 1233 | printf("connect failed: %s\n", strerror(save_errno)); |
9ff403f8 | 1234 | exit(85); |
c55a77db PH |
1235 | } |
1236 | ||
1237 | printf("connected\n"); | |
1238 | ||
1239 | ||
1240 | /* --------------- Set up for OpenSSL --------------- */ | |
1241 | ||
1242 | #ifdef HAVE_OPENSSL | |
1243 | SSL_library_init(); | |
1244 | SSL_load_error_strings(); | |
1245 | ||
7bbb3621 | 1246 | if (!(srv.ctx = SSL_CTX_new(SSLv23_method()))) |
c55a77db PH |
1247 | { |
1248 | printf ("SSL_CTX_new failed\n"); | |
9ff403f8 | 1249 | exit(84); |
c55a77db PH |
1250 | } |
1251 | ||
7bbb3621 | 1252 | if (certfile) |
c55a77db | 1253 | { |
7bbb3621 | 1254 | if (!SSL_CTX_use_certificate_file(srv.ctx, certfile, SSL_FILETYPE_PEM)) |
c55a77db PH |
1255 | { |
1256 | printf("SSL_CTX_use_certificate_file failed\n"); | |
9ff403f8 | 1257 | exit(83); |
c55a77db PH |
1258 | } |
1259 | printf("Certificate file = %s\n", certfile); | |
1260 | } | |
1261 | ||
7bbb3621 | 1262 | if (keyfile) |
c55a77db | 1263 | { |
7bbb3621 | 1264 | if (!SSL_CTX_use_PrivateKey_file(srv.ctx, keyfile, SSL_FILETYPE_PEM)) |
c55a77db PH |
1265 | { |
1266 | printf("SSL_CTX_use_PrivateKey_file failed\n"); | |
9ff403f8 | 1267 | exit(82); |
c55a77db PH |
1268 | } |
1269 | printf("Key file = %s\n", keyfile); | |
1270 | } | |
1271 | ||
7bbb3621 JH |
1272 | SSL_CTX_set_session_cache_mode(srv.ctx, SSL_SESS_CACHE_BOTH); |
1273 | SSL_CTX_set_timeout(srv.ctx, 200); | |
1274 | SSL_CTX_set_info_callback(srv.ctx, (void (*)())info_callback); | |
c55a77db PH |
1275 | #endif |
1276 | ||
1277 | ||
1278 | /* --------------- Set up for GnuTLS --------------- */ | |
1279 | ||
1280 | #ifdef HAVE_GNUTLS | |
1281 | if (certfile != NULL) printf("Certificate file = %s\n", certfile); | |
1282 | if (keyfile != NULL) printf("Key file = %s\n", keyfile); | |
059f2ace | 1283 | tls_init(US certfile, US keyfile); |
c55a77db | 1284 | tls_session = tls_session_init(); |
348051ad | 1285 | #ifdef HAVE_OCSP |
2b4a568d JH |
1286 | if (ocsp_stapling) |
1287 | gnutls_ocsp_status_request_enable_client(tls_session, NULL, 0, NULL); | |
348051ad | 1288 | #endif |
7bbb3621 | 1289 | gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr_t)(intptr_t)srv.sock); |
c55a77db PH |
1290 | |
1291 | /* When the server asks for a certificate and the client does not have one, | |
1292 | there is a SIGPIPE error in the gnutls_handshake() function for some reason | |
1293 | that is not understood. As luck would have it, this has never hit Exim itself | |
1294 | because it ignores SIGPIPE errors. Doing the same here allows it all to work as | |
1295 | one wants. */ | |
1296 | ||
1297 | signal(SIGPIPE, SIG_IGN); | |
1298 | #endif | |
1299 | ||
1300 | /* ---------------------------------------------- */ | |
1301 | ||
1302 | ||
1303 | /* Start TLS session if configured to do so without STARTTLS */ | |
1304 | ||
1305 | #ifdef HAVE_TLS | |
1306 | if (tls_on_connect) | |
1307 | { | |
1308 | printf("Attempting to start TLS\n"); | |
1309 | ||
fc4fcc34 | 1310 | #ifdef HAVE_OPENSSL |
7bbb3621 | 1311 | srv.tls_active = tls_start(srv.sock, &srv.ssl, srv.ctx); |
fc4fcc34 | 1312 | #endif |
c55a77db | 1313 | |
fc4fcc34 JH |
1314 | #ifdef HAVE_GNUTLS |
1315 | { | |
1316 | int rc; | |
c55a77db PH |
1317 | sigalrm_seen = FALSE; |
1318 | alarm(timeout); | |
fc4fcc34 JH |
1319 | do { |
1320 | rc = gnutls_handshake(tls_session); | |
1321 | } while (rc < 0 && gnutls_error_is_fatal(rc) == 0); | |
7bbb3621 | 1322 | srv.tls_active = rc >= 0; |
c55a77db | 1323 | alarm(0); |
fc4fcc34 | 1324 | |
7bbb3621 | 1325 | if (!srv.tls_active) printf("%s\n", gnutls_strerror(rc)); |
fc4fcc34 JH |
1326 | } |
1327 | #endif | |
c55a77db | 1328 | |
7bbb3621 | 1329 | if (!srv.tls_active) |
c55a77db | 1330 | printf("Failed to start TLS\n"); |
fc4fcc34 | 1331 | #if defined(HAVE_GNUTLS) && defined(HAVE_OCSP) |
2b4a568d JH |
1332 | else if ( ocsp_stapling |
1333 | && gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) | |
1334 | printf("Failed to verify certificate status\n"); | |
fc4fcc34 | 1335 | #endif |
c55a77db PH |
1336 | else |
1337 | printf("Succeeded in starting TLS\n"); | |
1338 | } | |
1339 | #endif | |
1340 | ||
7bbb3621 | 1341 | do_file(&srv, stdin, timeout, inbuffer, sizeof(inbuffer), inptr); |
c55a77db PH |
1342 | |
1343 | printf("End of script\n"); | |
7bbb3621 | 1344 | shutdown(srv.sock, SHUT_WR); |
ce80533b JH |
1345 | if (fcntl(srv.sock, F_SETFL, O_NONBLOCK) == 0) |
1346 | while (read(srv.sock, inbuffer, sizeof(inbuffer)) > 0) ; | |
7bbb3621 | 1347 | close(srv.sock); |
c55a77db PH |
1348 | |
1349 | exit(0); | |
1350 | } | |
1351 | ||
1352 | /* End of client.c */ |