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
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. */
7 /* ANSI C standard includes */
22 #include <sys/types.h>
24 #include <netinet/in_systm.h>
25 #include <netinet/in.h>
26 #include <netinet/ip.h>
27 #include <netinet/tcp.h>
30 #include <arpa/inet.h>
32 #include <sys/resource.h>
33 #include <sys/socket.h>
39 /* Set to TRUE to enable debug output */
40 #define DEBUG if (FALSE)
47 #define S_ADDR_TYPE u_long
50 typedef unsigned char uschar;
53 #define US (unsigned char *)
60 static int sigalrm_seen = 0;
63 /* TLS support can be optionally included, either for OpenSSL or GnuTLS. The
64 latter needs a whole pile of tables. */
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>
74 # if OPENSSL_VERSION_NUMBER < 0x0090806fL && !defined(DISABLE_OCSP) && !defined(OPENSSL_NO_TLSEXT)
75 # warning "OpenSSL library version too old; define DISABLE_OCSP in Makefile"
79 # include <openssl/ocsp.h>
86 # include <gnutls/gnutls.h>
87 # include <gnutls/x509.h>
88 # if GNUTLS_VERSION_NUMBER >= 0x030103
90 # include <gnutls/ocsp.h>
92 # ifndef GNUTLS_NO_EXTENSIONS
93 # define GNUTLS_NO_EXTENSIONS 0
98 /* Local static variables for GNUTLS */
100 static gnutls_dh_params_t dh_params = NULL;
102 static gnutls_certificate_credentials_t x509_cred = NULL;
103 static gnutls_session_t tls_session = NULL;
105 static int ssl_session_timeout = 200;
107 /* Priorities for TLS algorithms to use. */
109 # if GNUTLS_VERSION_NUMBER < 0x030400
110 static const int protocol_priority[16] = { GNUTLS_TLS1, GNUTLS_SSL3, 0 };
112 static const int kx_priority[16] = {
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,
125 static const int mac_priority[16] = {
130 static const int comp_priority[16] = { GNUTLS_COMP_NULL, 0 };
133 #endif /*HAVE_GNUTLS*/
138 char * ocsp_stapling = NULL;
139 char * pri_string = NULL;
143 /*************************************************
144 * SIGALRM handler - crash out *
145 *************************************************/
148 sigalrm_handler_crash(int sig)
150 sig = sig; /* Keep picky compilers happy */
151 printf("\nClient timed out\n");
156 /*************************************************
157 * SIGALRM handler - set flag *
158 *************************************************/
161 sigalrm_handler_flag(int sig)
163 sig = sig; /* Keep picky compilers happy */
169 /****************************************************************************/
170 /****************************************************************************/
173 # ifndef DISABLE_OCSP
175 static STACK_OF(X509) *
176 chain_from_pem_file(const uschar * file)
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)))
193 cert_stack_free(STACK_OF(X509) * sk)
195 while (sk_X509_num(sk) > 0) (void) sk_X509_pop(sk);
201 tls_client_stapling_cb(SSL *s, void *arg)
203 const unsigned char *p;
210 len = SSL_get_tlsext_status_ocsp_resp(s, &p);
211 /*BIO_printf(arg, "OCSP response: ");*/
214 BIO_printf(arg, "no response received\n");
217 if(!(rsp = d2i_OCSP_RESPONSE(NULL, &p, len)))
219 BIO_printf(arg, "response parse error\n");
220 BIO_dump_indent(arg, (char *)p, len, 4);
223 if(!(bs = OCSP_response_get1_basic(rsp)))
225 BIO_printf(arg, "error parsing response\n");
230 if (!(sk = chain_from_pem_file((const uschar *)ocsp_stapling)))
232 BIO_printf(arg, "error in cert setup\n");
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. */
241 if(OCSP_basic_verify(bs, sk, NULL, OCSP_NOVERIFY) <= 0)
243 BIO_printf(arg, "Response Verify Failure\n");
244 ERR_print_errors(arg);
248 BIO_printf(arg, "Response verify OK\n");
253 # endif /*DISABLE_OCSP*/
256 /*************************************************
257 * Start an OpenSSL TLS session *
258 *************************************************/
261 tls_start(int sock, SSL **ssl, SSL_CTX *ctx)
264 static const unsigned char *sid_ctx = US"exim";
266 RAND_load_file("client.c", -1); /* Not *very* random! */
268 *ssl = SSL_new (ctx);
269 SSL_set_session_id_context(*ssl, sid_ctx, strlen(CS sid_ctx));
270 SSL_set_fd (*ssl, sock);
271 SSL_set_connect_state(*ssl);
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);
282 signal(SIGALRM, sigalrm_handler_flag);
285 rc = SSL_connect (*ssl);
290 printf("SSL_connect timed out\n");
296 ERR_print_errors_fp(stdout);
300 /* printf("SSL connection using %s\n", SSL_get_cipher (*ssl)); */
305 /*************************************************
306 * SSL Information callback *
307 *************************************************/
310 info_callback(SSL *s, int where, int ret)
314 printf("SSL info: %s\n", SSL_state_string_long(s));
319 /****************************************************************************/
320 /****************************************************************************/
324 /*************************************************
325 * Handle GnuTLS error *
326 *************************************************/
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.
333 err a GnuTLS error number, or 0 if local error
335 Returns: doesn't - it dies
339 gnutls_error(uschar *prefix, int err)
341 fprintf(stderr, "GnuTLS connection error: %s:", prefix);
342 if (err != 0) fprintf(stderr, " %s", gnutls_strerror(err));
343 fprintf(stderr, "\n");
349 /*************************************************
350 * Setup up DH parameters *
351 *************************************************/
353 /* For the test suite, the parameters should always be available in the spool
362 uschar filename[200];
365 /* Initialize the data structures for holding the parameters */
367 ret = gnutls_dh_params_init(&dh_params);
368 if (ret < 0) gnutls_error(US"init dh_params", ret);
370 /* Open the cache file for reading and if successful, read it and set up the
373 fd = open("aux-fixed/gnutls-params", O_RDONLY, 0);
376 fprintf(stderr, "Failed to open spool/gnutls-params: %s\n", strerror(errno));
380 if (fstat(fd, &statbuf) < 0)
383 return gnutls_error(US"TLS cache stat failed", 0);
386 m.size = statbuf.st_size;
387 m.data = malloc(m.size);
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);
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);
402 /*************************************************
403 * Initialize for GnuTLS *
404 *************************************************/
408 certificate certificate file
409 privatekey private key file
413 tls_init(uschar *certificate, uschar *privatekey)
417 rc = gnutls_global_init();
418 if (rc < 0) gnutls_error(US"gnutls_global_init", rc);
420 /* Read D-H parameters from the cache file. */
424 /* Create the credentials structure */
426 rc = gnutls_certificate_allocate_credentials(&x509_cred);
427 if (rc < 0) gnutls_error(US"certificate_allocate_credentials", rc);
429 /* Set the certificate and private keys */
431 if (certificate != NULL)
433 rc = gnutls_certificate_set_x509_key_file(x509_cred, CS certificate,
434 CS privatekey, GNUTLS_X509_FMT_PEM);
435 if (rc < 0) gnutls_error(US"gnutls_certificate", rc);
438 /* Associate the parameters with the x509 credentials structure. */
440 gnutls_certificate_set_dh_params(x509_cred, dh_params);
442 /* set the CA info for server-cert verify */
444 gnutls_certificate_set_x509_trust_file(x509_cred, ocsp_stapling,
445 GNUTLS_X509_FMT_PEM);
450 /*************************************************
451 * Initialize a single GNUTLS session *
452 *************************************************/
454 static gnutls_session_t
455 tls_session_init(void)
457 gnutls_session_t session;
459 gnutls_init(&session, GNUTLS_CLIENT | GNUTLS_NO_EXTENSIONS);
461 # if GNUTLS_VERSION_NUMBER < 0x030400
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);
468 gnutls_cred_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
472 gnutls_priority_t priority_cache;
475 gnutls_priority_init(&priority_cache, pri_string, &errpos);
476 gnutls_priority_set(session, priority_cache);
479 gnutls_set_default_priority(session);
480 gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
483 gnutls_dh_set_prime_bits(session, DH_BITS);
484 gnutls_db_set_cache_expiration(session, ssl_session_timeout);
491 /****************************************************************************/
492 /* Turn "\n" and "\r" into the relevant characters. This is a hack. */
495 unescape_buf(unsigned char * buf, int len)
501 for (s = buf; s < buf+len; s++) if (*s == '\\')
505 default: c = s[1]; shift = 1; break;
506 case 'n': c = '\n'; shift = 1; break;
507 case 'r': c = '\r'; shift = 1; break;
510 if (t >= 'A' && t <= 'F') t -= 'A'-'9'-1;
511 else if (t >= 'a' && t <= 'f') t -= 'a'-'9'-1;
515 if (t >= 'A' && t <= 'F') t -= 'A'-'9'-1;
516 else if (t >= 'a' && t <= 'f') t -= 'a'-'9'-1;
523 memmove(s+1, s+shift+1, len-shift);
530 /****************************************************************************/
542 do_file(srv_ctx * srv, FILE * f, int timeout,
543 unsigned char * inbuffer, unsigned bsiz, unsigned char * inptr)
545 unsigned char outbuffer[1024 * 20];
547 while (fgets(CS outbuffer, sizeof(outbuffer), f) != NULL)
549 int n = (int)strlen(CS outbuffer);
553 /* Strip trailing newline */
554 if (outbuffer[n-1] == '\n') outbuffer[--n] = 0;
556 /* Expect incoming */
558 if ( strncmp(CS outbuffer, "???", 3) == 0
559 && (outbuffer[3] == ' ' || outbuffer[3] == '*' || outbuffer[3] == '?')
562 unsigned char *lineptr;
563 unsigned exp_eof = outbuffer[3] == '*';
564 unsigned resp_optional = outbuffer[3] == '?';
566 printf("%s\n", outbuffer);
567 n = unescape_buf(outbuffer, n);
570 if (*inptr == 0) /* Refill input buffer */
572 unsigned char *inbufferp = inbuffer;
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); }
585 switch (error = SSL_get_error(srv->ssl, rc))
587 case SSL_ERROR_ZERO_RETURN:
589 case SSL_ERROR_SYSCALL:
590 printf("%s\n", ERR_error_string(ERR_get_error(), NULL));
594 printf("%s\nTLS terminated\n", ERR_error_string(ERR_get_error(), NULL));
595 SSL_shutdown(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};
601 sigaction(SIGALRM, &act, NULL);
604 DEBUG { printf("go round\n"); fflush(stdout); }
607 printf("SSL error code %d\n", error);
612 DEBUG { printf("call gnutls_record_recv\n"); fflush(stdout); }
613 rc = gnutls_record_recv(tls_session, CS inbufferp, bsiz - (inbufferp - inbuffer) - 1);
616 DEBUG { printf("gnutls_record_recv: %s\n", gnutls_strerror(rc)); fflush(stdout); }
617 if (rc == GNUTLS_E_INTERRUPTED || rc == GNUTLS_E_AGAIN)
619 printf("%s\n", gnutls_strerror(rc));
620 srv->tls_active = FALSE;
622 DEBUG { printf("go round\n"); fflush(stdout); }
625 DEBUG { printf("gnutls_record_recv: %d\n", rc); fflush(stdout); }
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); }
635 if (rc > 0) inbufferp[rc] = '\0';
636 if (rc <= 0 || strchr(inbufferp, '\n')) break;
638 if (inbufferp >= inbuffer + bsiz)
640 printf("Input buffer overrun, need more than %d bytes input buffer\n", bsiz);
643 DEBUG { printf("read more\n"); }
649 if (errno == EINTR && sigalrm_seen && resp_optional)
650 continue; /* next scriptline */
651 printf("Read error: %s\n", strerror(errno));
657 printf("Expected EOF read\n");
660 else if (resp_optional)
661 continue; /* next scriptline */
664 printf("Unexpected EOF read\n");
670 printf("Expected EOF not read\n");
677 DEBUG { printf("read: '%s'\n", inptr); fflush(stdout); }
680 while (*inptr != 0 && *inptr != '\r' && *inptr != '\n') inptr++;
684 if (*inptr == '\n') inptr++;
687 if (strncmp(CS lineptr, CS outbuffer + 4, n - 4) != 0)
690 inptr = lineptr; /* consume scriptline, not inputline */
695 printf("<<< %s\n", lineptr);
696 printf("\n******** Input mismatch ********\n");
700 /* Input matched script. Output the inputline, unless optional */
701 DEBUG { printf("read matched\n"); fflush(stdout); }
704 printf("<<< %s\n", lineptr);
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
715 if (srv->sent_starttls)
717 if (lineptr[0] == '2')
721 printf("Attempting to start TLS\n");
725 srv->tls_active = tls_start(srv->sock, &srv->ssl, srv->ctx);
732 struct timeval tv = { 0, 2000 };
734 sigalrm_seen = FALSE;
737 rc = gnutls_handshake(tls_session);
738 } while (rc < 0 && gnutls_error_is_fatal(rc) == 0);
739 srv->tls_active = rc >= 0;
742 if (!srv->tls_active) printf("%s\n", gnutls_strerror(rc));
744 /* look for an error on the TLS conn */
746 FD_SET(srv->sock, &rfd);
747 if (select(srv->sock+1, &rfd, NULL, NULL, &tv) > 0)
750 DEBUG { printf("call gnutls_record_recv\n"); fflush(stdout); }
751 rc = gnutls_record_recv(tls_session, CS inbuffer, bsiz - 1);
754 DEBUG { printf("gnutls_record_recv: %s\n", gnutls_strerror(rc)); fflush(stdout); }
755 if (rc == GNUTLS_E_INTERRUPTED || rc == GNUTLS_E_AGAIN)
757 printf("%s\n", gnutls_strerror(rc));
758 srv->tls_active = FALSE;
760 DEBUG { printf("gnutls_record_recv: %d\n", rc); fflush(stdout); }
765 if (!srv->tls_active)
767 printf("Failed to start TLS\n");
771 else if (ocsp_stapling)
773 if ((rc= gnutls_certificate_verify_peers2(tls_session, &verify)) < 0)
775 printf("Failed to verify certificate: %s\n", gnutls_strerror(rc));
778 else if (verify & (GNUTLS_CERT_INVALID|GNUTLS_CERT_REVOKED))
780 printf("Bad certificate\n");
784 else if (gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0)
786 printf("Failed to verify certificate status\n");
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
797 fprintf(stderr, "%.4096s", printed.data);
798 gnutls_free(printed.data);
801 (void) fprintf(stderr,"ocsp decode: %s", gnutls_strerror(rc));
809 printf("Succeeded in starting TLS\n");
811 else printf("Abandoning TLS start attempt\n");
813 srv->sent_starttls = 0;
817 /* Wait for a bit before proceeding */
819 else if (strncmp(CS outbuffer, "+++ ", 4) == 0)
821 printf("%s\n", outbuffer);
822 sleep(atoi(CS outbuffer + 4));
825 /* Stack new input file */
827 else if (strncmp(CS outbuffer, "<<< ", 4) == 0)
830 if (!(new_f = fopen((const char *)outbuffer+4 , "r")))
832 printf("Unable to open '%s': %s", inptr, strerror(errno));
835 do_file(srv, new_f, timeout, inbuffer, bsiz, inptr);
839 /* Send line outgoing, but barf if unconsumed incoming */
843 unsigned char * out = outbuffer;
845 if (strncmp(CS outbuffer, ">>> ", 4) == 0)
854 printf("Unconsumed input: %s", inptr);
855 printf(" About to send: %s\n", out);
863 if (strcmp(CS out, "stoptls") == 0 ||
864 strcmp(CS out, "STOPTLS") == 0)
866 if (!srv->tls_active)
868 printf("STOPTLS read when TLS not active\n");
871 printf("Shutting down TLS encryption\n");
874 SSL_shutdown(srv->ssl);
879 gnutls_bye(tls_session, GNUTLS_SHUT_WR);
880 gnutls_deinit(tls_session);
882 gnutls_global_deinit();
889 /* Remember that we sent STARTTLS */
891 srv->sent_starttls = (strcmp(CS out, "starttls") == 0 ||
892 strcmp(CS out, "STARTTLS") == 0);
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. */
898 if (strcmp(CS out, "starttls_wait") == 0)
905 printf(">>> %s\n", out);
908 strcpy(CS out + n, "\r\n");
912 n = unescape_buf(out, n);
920 rc = SSL_write (srv->ssl, out, n);
923 if ((rc = gnutls_record_send(tls_session, CS out, n)) < 0)
925 printf("GnuTLS write error: %s\n", gnutls_strerror(rc));
931 rc = write(srv->sock, out, n);
936 printf("Write error: %s\n", strerror(errno));
946 /*************************************************
948 *************************************************/
950 const char * const HELP_MESSAGE = "\n\
958 [-p priority-string]\n"
962 [-tn] n seconds timeout\n\
965 [<outgoing interface>]\n\
971 main(int argc, char **argv)
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;
981 int host_af, port, s_len, rc, save_errno;
983 int tls_on_connect = 0;
987 struct sockaddr_in6 s_in6;
992 unsigned char inbuffer[100 * 1024];
993 unsigned char *inptr = inbuffer;
995 *inptr = 0; /* Buffer empty */
997 srv.sent_starttls = 0;
1001 while (argc >= argi + 1 && argv[argi][0] == '-')
1003 if (strcmp(argv[argi], "-help") == 0 ||
1004 strcmp(argv[argi], "--help") == 0 ||
1005 strcmp(argv[argi], "-h") == 0)
1010 if (strcmp(argv[argi], "-tls-on-connect") == 0)
1016 else if (strcmp(argv[argi], "-ocsp") == 0)
1018 if (argc < ++argi + 1)
1020 fprintf(stderr, "Missing required certificate file for ocsp option\n");
1023 ocsp_stapling = argv[argi++];
1026 else if (strcmp(argv[argi], "-p") == 0)
1028 if (argc < ++argi + 1)
1030 fprintf(stderr, "Missing priority string\n");
1033 pri_string = argv[argi++];
1038 else if (argv[argi][1] == 't' && isdigit(argv[argi][2]))
1040 tmplong = strtol(argv[argi]+2, &end, 10);
1041 if (end == argv[argi]+2 || *end)
1043 fprintf(stderr, "Failed to parse seconds from option <%s>\n",
1047 if (tmplong > 10000L)
1049 fprintf(stderr, "Unreasonably long wait of %ld seconds requested\n",
1055 fprintf(stderr, "Timeout must not be negative (%ld)\n", tmplong);
1058 timeout = (int) tmplong;
1063 fprintf(stderr, "Unrecognized option %s\n", argv[argi]);
1068 /* Mandatory 1st arg is IP address */
1072 fprintf(stderr, "No IP address given\n");
1076 address = argv[argi++];
1077 host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET;
1079 /* Mandatory 2nd arg is port */
1083 fprintf(stderr, "No port number given\n");
1087 port = atoi(argv[argi++]);
1089 /* Optional next arg is interface */
1092 (isdigit((unsigned char)argv[argi][0]) || argv[argi][0] == ':'))
1093 interface = argv[argi++];
1095 /* Any more arguments are the name of a certificate file and key file */
1097 if (argc > argi) certfile = argv[argi++];
1098 if (argc > argi) keyfile = argv[argi++];
1102 /* For an IPv6 address, use an IPv6 sockaddr structure. */
1104 if (host_af == AF_INET6)
1106 s_ptr = (struct sockaddr *)&s_in6;
1107 s_len = sizeof(s_in6);
1112 /* For an IPv4 address, use an IPv4 sockaddr structure,
1113 even on an IPv6 system. */
1116 s_ptr = (struct sockaddr *)&s_in4;
1117 s_len = sizeof(s_in4);
1120 printf("Connecting to %s port %d ... ", address, port);
1122 srv.sock = socket(host_af, SOCK_STREAM, 0);
1125 printf("socket creation failed: %s\n", strerror(errno));
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. */
1133 if (interface != NULL)
1135 int interface_af = (strchr(interface, ':') != NULL)? AF_INET6 : AF_INET;
1137 if (interface_af == host_af)
1141 /* Set up for IPv6 binding */
1143 if (host_af == AF_INET6)
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)
1150 printf("Unable to parse \"%s\"", interface);
1157 /* Set up for IPv4 binding */
1160 memset(&s_in4, 0, sizeof(s_in4));
1161 s_in4.sin_family = AF_INET;
1163 s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(interface);
1168 if (bind(srv.sock, s_ptr, s_len) < 0)
1170 printf("Unable to bind outgoing SMTP call to %s: %s",
1171 interface, strerror(errno));
1177 /* Set up a remote IPv6 address */
1180 if (host_af == AF_INET6)
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)
1190 printf("unable to parse \"%s\" as an IP address: %s\n", address,
1191 rc == 0 ? "NULL result returned" : gai_strerror(rc));
1194 memcpy(&s_in6, res->ai_addr, res->ai_addrlen);
1197 memset(&s_in6, 0, sizeof(s_in6));
1198 s_in6.sin6_family = AF_INET6;
1199 if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1)
1201 printf("Unable to parse \"%s\"", address);
1205 s_in6.sin6_port = htons(port);
1210 /* Set up a remote IPv4 address */
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);
1219 /* SIGALRM handler crashes out */
1221 signal(SIGALRM, sigalrm_handler_crash);
1223 rc = connect(srv.sock, s_ptr, s_len);
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. */
1233 printf("connect failed: %s\n", strerror(save_errno));
1237 printf("connected\n");
1240 /* --------------- Set up for OpenSSL --------------- */
1244 SSL_load_error_strings();
1246 if (!(srv.ctx = SSL_CTX_new(SSLv23_method())))
1248 printf ("SSL_CTX_new failed\n");
1254 if (!SSL_CTX_use_certificate_file(srv.ctx, certfile, SSL_FILETYPE_PEM))
1256 printf("SSL_CTX_use_certificate_file failed\n");
1259 printf("Certificate file = %s\n", certfile);
1264 if (!SSL_CTX_use_PrivateKey_file(srv.ctx, keyfile, SSL_FILETYPE_PEM))
1266 printf("SSL_CTX_use_PrivateKey_file failed\n");
1269 printf("Key file = %s\n", keyfile);
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);
1278 /* --------------- Set up for GnuTLS --------------- */
1281 if (certfile != NULL) printf("Certificate file = %s\n", certfile);
1282 if (keyfile != NULL) printf("Key file = %s\n", keyfile);
1283 tls_init(US certfile, US keyfile);
1284 tls_session = tls_session_init();
1287 gnutls_ocsp_status_request_enable_client(tls_session, NULL, 0, NULL);
1289 gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr_t)(intptr_t)srv.sock);
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
1297 signal(SIGPIPE, SIG_IGN);
1300 /* ---------------------------------------------- */
1303 /* Start TLS session if configured to do so without STARTTLS */
1308 printf("Attempting to start TLS\n");
1311 srv.tls_active = tls_start(srv.sock, &srv.ssl, srv.ctx);
1317 sigalrm_seen = FALSE;
1320 rc = gnutls_handshake(tls_session);
1321 } while (rc < 0 && gnutls_error_is_fatal(rc) == 0);
1322 srv.tls_active = rc >= 0;
1325 if (!srv.tls_active) printf("%s\n", gnutls_strerror(rc));
1329 if (!srv.tls_active)
1330 printf("Failed to start TLS\n");
1331 #if defined(HAVE_GNUTLS) && defined(HAVE_OCSP)
1332 else if ( ocsp_stapling
1333 && gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0)
1334 printf("Failed to verify certificate status\n");
1337 printf("Succeeded in starting TLS\n");
1341 do_file(&srv, stdin, timeout, inbuffer, sizeof(inbuffer), inptr);
1343 printf("End of script\n");
1344 shutdown(srv.sock, SHUT_WR);
1345 if (fcntl(srv.sock, F_SETFL, O_NONBLOCK) == 0)
1346 while (read(srv.sock, inbuffer, sizeof(inbuffer)) > 0) ;
1352 /* End of client.c */