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 */
577 DEBUG { printf("call SSL_read\n"); fflush(stdout); }
578 rc = SSL_read(srv->ssl, inbuffer, bsiz - 1);
579 DEBUG { printf("SSL_read: %d\n", rc); fflush(stdout); }
581 switch (error = SSL_get_error(srv->ssl, rc))
583 case SSL_ERROR_ZERO_RETURN:
585 case SSL_ERROR_SYSCALL:
586 printf("%s\n", ERR_error_string(ERR_get_error(), NULL));
590 printf("%s\nTLS terminated\n", ERR_error_string(ERR_get_error(), NULL));
591 SSL_shutdown(srv->ssl);
593 srv->tls_active = FALSE;
594 { /* OpenSSL leaves it in restartsys mode */
595 struct sigaction act = {.sa_handler = sigalrm_handler_flag, .sa_flags = 0};
597 sigaction(SIGALRM, &act, NULL);
600 DEBUG { printf("go round\n"); fflush(stdout); }
603 printf("SSL error code %d\n", error);
608 DEBUG { printf("call gnutls_record_recv\n"); fflush(stdout); }
609 rc = gnutls_record_recv(tls_session, CS inbuffer, bsiz - 1);
612 DEBUG { printf("gnutls_record_recv: %s\n", gnutls_strerror(rc)); fflush(stdout); }
613 if (rc == GNUTLS_E_INTERRUPTED || rc == GNUTLS_E_AGAIN)
615 printf("%s\n", gnutls_strerror(rc));
616 srv->tls_active = FALSE;
618 DEBUG { printf("go round\n"); fflush(stdout); }
621 DEBUG { printf("gnutls_record_recv: %d\n", rc); fflush(stdout); }
626 DEBUG { printf("call read\n"); fflush(stdout); }
627 rc = read(srv->sock, inbuffer, bsiz);
628 DEBUG { printf("read: %d\n", rc); fflush(stdout); }
634 if (errno == EINTR && sigalrm_seen && resp_optional)
635 continue; /* next scriptline */
636 printf("Read error: %s\n", strerror(errno));
642 printf("Expected EOF read\n");
645 else if (resp_optional)
646 continue; /* next scriptline */
649 printf("Unexpected EOF read\n");
655 printf("Expected EOF not read\n");
665 DEBUG { printf("read: '%s'\n", inptr); fflush(stdout); }
668 while (*inptr != 0 && *inptr != '\r' && *inptr != '\n') inptr++;
672 if (*inptr == '\n') inptr++;
675 if (strncmp(CS lineptr, CS outbuffer + 4, n - 4) != 0)
678 inptr = lineptr; /* consume scriptline, not inputline */
683 printf("<<< %s\n", lineptr);
684 printf("\n******** Input mismatch ********\n");
688 /* Input matched script. Output the inputline, unless optional */
689 DEBUG { printf("read matched\n"); fflush(stdout); }
692 printf("<<< %s\n", lineptr);
695 /* If there is further input after this line, consume inputline but not
696 scriptline in case there are several matching. Nonmatches are dealt with
703 if (srv->sent_starttls)
705 if (lineptr[0] == '2')
709 printf("Attempting to start TLS\n");
713 srv->tls_active = tls_start(srv->sock, &srv->ssl, srv->ctx);
720 struct timeval tv = { 0, 2000 };
722 sigalrm_seen = FALSE;
725 rc = gnutls_handshake(tls_session);
726 } while (rc < 0 && gnutls_error_is_fatal(rc) == 0);
727 srv->tls_active = rc >= 0;
730 if (!srv->tls_active) printf("%s\n", gnutls_strerror(rc));
732 /* look for an error on the TLS conn */
734 FD_SET(srv->sock, &rfd);
735 if (select(srv->sock+1, &rfd, NULL, NULL, &tv) > 0)
738 DEBUG { printf("call gnutls_record_recv\n"); fflush(stdout); }
739 rc = gnutls_record_recv(tls_session, CS inbuffer, bsiz - 1);
742 DEBUG { printf("gnutls_record_recv: %s\n", gnutls_strerror(rc)); fflush(stdout); }
743 if (rc == GNUTLS_E_INTERRUPTED || rc == GNUTLS_E_AGAIN)
745 printf("%s\n", gnutls_strerror(rc));
746 srv->tls_active = FALSE;
748 DEBUG { printf("gnutls_record_recv: %d\n", rc); fflush(stdout); }
753 if (!srv->tls_active)
755 printf("Failed to start TLS\n");
759 else if (ocsp_stapling)
761 if ((rc= gnutls_certificate_verify_peers2(tls_session, &verify)) < 0)
763 printf("Failed to verify certificate: %s\n", gnutls_strerror(rc));
766 else if (verify & (GNUTLS_CERT_INVALID|GNUTLS_CERT_REVOKED))
768 printf("Bad certificate\n");
772 else if (gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0)
774 printf("Failed to verify certificate status\n");
776 gnutls_datum_t stapling;
777 gnutls_ocsp_resp_t resp;
778 gnutls_datum_t printed;
779 if ( (rc= gnutls_ocsp_status_request_get(tls_session, &stapling)) == 0
780 && (rc= gnutls_ocsp_resp_init(&resp)) == 0
781 && (rc= gnutls_ocsp_resp_import(resp, &stapling)) == 0
782 && (rc= gnutls_ocsp_resp_print(resp, GNUTLS_OCSP_PRINT_FULL, &printed)) == 0
785 fprintf(stderr, "%.4096s", printed.data);
786 gnutls_free(printed.data);
789 (void) fprintf(stderr,"ocsp decode: %s", gnutls_strerror(rc));
797 printf("Succeeded in starting TLS\n");
799 else printf("Abandoning TLS start attempt\n");
801 srv->sent_starttls = 0;
805 /* Wait for a bit before proceeding */
807 else if (strncmp(CS outbuffer, "+++ ", 4) == 0)
809 printf("%s\n", outbuffer);
810 sleep(atoi(CS outbuffer + 4));
813 /* Stack new input file */
815 else if (strncmp(CS outbuffer, "<<< ", 4) == 0)
818 if (!(new_f = fopen((const char *)outbuffer+4 , "r")))
820 printf("Unable to open '%s': %s", inptr, strerror(errno));
823 do_file(srv, new_f, timeout, inbuffer, bsiz, inptr);
827 /* Send line outgoing, but barf if unconsumed incoming */
831 unsigned char * out = outbuffer;
833 if (strncmp(CS outbuffer, ">>> ", 4) == 0)
842 printf("Unconsumed input: %s", inptr);
843 printf(" About to send: %s\n", out);
851 if (strcmp(CS out, "stoptls") == 0 ||
852 strcmp(CS out, "STOPTLS") == 0)
854 if (!srv->tls_active)
856 printf("STOPTLS read when TLS not active\n");
859 printf("Shutting down TLS encryption\n");
862 SSL_shutdown(srv->ssl);
867 gnutls_bye(tls_session, GNUTLS_SHUT_WR);
868 gnutls_deinit(tls_session);
870 gnutls_global_deinit();
877 /* Remember that we sent STARTTLS */
879 srv->sent_starttls = (strcmp(CS out, "starttls") == 0 ||
880 strcmp(CS out, "STARTTLS") == 0);
882 /* Fudge: if the command is "starttls_wait", we send the starttls bit,
883 but we haven't set the flag, so that there is no negotiation. This is for
884 testing the server's timeout. */
886 if (strcmp(CS out, "starttls_wait") == 0)
893 printf(">>> %s\n", out);
896 strcpy(CS out + n, "\r\n");
900 n = unescape_buf(out, n);
908 rc = SSL_write (srv->ssl, out, n);
911 if ((rc = gnutls_record_send(tls_session, CS out, n)) < 0)
913 printf("GnuTLS write error: %s\n", gnutls_strerror(rc));
919 rc = write(srv->sock, out, n);
924 printf("Write error: %s\n", strerror(errno));
934 /*************************************************
936 *************************************************/
938 const char * const HELP_MESSAGE = "\n\
946 [-p priority-string]\n"
950 [-tn] n seconds timeout\n\
953 [<outgoing interface>]\n\
959 main(int argc, char **argv)
961 struct sockaddr *s_ptr;
962 struct sockaddr_in s_in4;
963 char *interface = NULL;
964 char *address = NULL;
965 char *certfile = NULL;
966 char *keyfile = NULL;
969 int host_af, port, s_len, rc, save_errno;
971 int tls_on_connect = 0;
975 struct sockaddr_in6 s_in6;
980 unsigned char inbuffer[10240];
981 unsigned char *inptr = inbuffer;
983 *inptr = 0; /* Buffer empty */
985 srv.sent_starttls = 0;
989 while (argc >= argi + 1 && argv[argi][0] == '-')
991 if (strcmp(argv[argi], "-help") == 0 ||
992 strcmp(argv[argi], "--help") == 0 ||
993 strcmp(argv[argi], "-h") == 0)
998 if (strcmp(argv[argi], "-tls-on-connect") == 0)
1004 else if (strcmp(argv[argi], "-ocsp") == 0)
1006 if (argc < ++argi + 1)
1008 fprintf(stderr, "Missing required certificate file for ocsp option\n");
1011 ocsp_stapling = argv[argi++];
1014 else if (strcmp(argv[argi], "-p") == 0)
1016 if (argc < ++argi + 1)
1018 fprintf(stderr, "Missing priority string\n");
1021 pri_string = argv[argi++];
1026 else if (argv[argi][1] == 't' && isdigit(argv[argi][2]))
1028 tmplong = strtol(argv[argi]+2, &end, 10);
1029 if (end == argv[argi]+2 || *end)
1031 fprintf(stderr, "Failed to parse seconds from option <%s>\n",
1035 if (tmplong > 10000L)
1037 fprintf(stderr, "Unreasonably long wait of %ld seconds requested\n",
1043 fprintf(stderr, "Timeout must not be negative (%ld)\n", tmplong);
1046 timeout = (int) tmplong;
1051 fprintf(stderr, "Unrecognized option %s\n", argv[argi]);
1056 /* Mandatory 1st arg is IP address */
1060 fprintf(stderr, "No IP address given\n");
1064 address = argv[argi++];
1065 host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET;
1067 /* Mandatory 2nd arg is port */
1071 fprintf(stderr, "No port number given\n");
1075 port = atoi(argv[argi++]);
1077 /* Optional next arg is interface */
1080 (isdigit((unsigned char)argv[argi][0]) || argv[argi][0] == ':'))
1081 interface = argv[argi++];
1083 /* Any more arguments are the name of a certificate file and key file */
1085 if (argc > argi) certfile = argv[argi++];
1086 if (argc > argi) keyfile = argv[argi++];
1090 /* For an IPv6 address, use an IPv6 sockaddr structure. */
1092 if (host_af == AF_INET6)
1094 s_ptr = (struct sockaddr *)&s_in6;
1095 s_len = sizeof(s_in6);
1100 /* For an IPv4 address, use an IPv4 sockaddr structure,
1101 even on an IPv6 system. */
1104 s_ptr = (struct sockaddr *)&s_in4;
1105 s_len = sizeof(s_in4);
1108 printf("Connecting to %s port %d ... ", address, port);
1110 srv.sock = socket(host_af, SOCK_STREAM, 0);
1113 printf("socket creation failed: %s\n", strerror(errno));
1117 /* Bind to a specific interface if requested. On an IPv6 system, this has
1118 to be of the same family as the address we are calling. On an IPv4 system the
1119 test is redundant, but it keeps the code tidier. */
1121 if (interface != NULL)
1123 int interface_af = (strchr(interface, ':') != NULL)? AF_INET6 : AF_INET;
1125 if (interface_af == host_af)
1129 /* Set up for IPv6 binding */
1131 if (host_af == AF_INET6)
1133 memset(&s_in6, 0, sizeof(s_in6));
1134 s_in6.sin6_family = AF_INET6;
1135 s_in6.sin6_port = 0;
1136 if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1)
1138 printf("Unable to parse \"%s\"", interface);
1145 /* Set up for IPv4 binding */
1148 memset(&s_in4, 0, sizeof(s_in4));
1149 s_in4.sin_family = AF_INET;
1151 s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(interface);
1156 if (bind(srv.sock, s_ptr, s_len) < 0)
1158 printf("Unable to bind outgoing SMTP call to %s: %s",
1159 interface, strerror(errno));
1165 /* Set up a remote IPv6 address */
1168 if (host_af == AF_INET6)
1170 memset(&s_in6, 0, sizeof(s_in6));
1171 s_in6.sin6_family = AF_INET6;
1172 s_in6.sin6_port = htons(port);
1173 if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1)
1175 printf("Unable to parse \"%s\"", address);
1182 /* Set up a remote IPv4 address */
1185 memset(&s_in4, 0, sizeof(s_in4));
1186 s_in4.sin_family = AF_INET;
1187 s_in4.sin_port = htons(port);
1188 s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(address);
1191 /* SIGALRM handler crashes out */
1193 signal(SIGALRM, sigalrm_handler_crash);
1195 rc = connect(srv.sock, s_ptr, s_len);
1199 /* A failure whose error code is "Interrupted system call" is in fact
1200 an externally applied timeout if the signal handler has been run. */
1205 printf("connect failed: %s\n", strerror(save_errno));
1209 printf("connected\n");
1212 /* --------------- Set up for OpenSSL --------------- */
1216 SSL_load_error_strings();
1218 if (!(srv.ctx = SSL_CTX_new(SSLv23_method())))
1220 printf ("SSL_CTX_new failed\n");
1226 if (!SSL_CTX_use_certificate_file(srv.ctx, certfile, SSL_FILETYPE_PEM))
1228 printf("SSL_CTX_use_certificate_file failed\n");
1231 printf("Certificate file = %s\n", certfile);
1236 if (!SSL_CTX_use_PrivateKey_file(srv.ctx, keyfile, SSL_FILETYPE_PEM))
1238 printf("SSL_CTX_use_PrivateKey_file failed\n");
1241 printf("Key file = %s\n", keyfile);
1244 SSL_CTX_set_session_cache_mode(srv.ctx, SSL_SESS_CACHE_BOTH);
1245 SSL_CTX_set_timeout(srv.ctx, 200);
1246 SSL_CTX_set_info_callback(srv.ctx, (void (*)())info_callback);
1250 /* --------------- Set up for GnuTLS --------------- */
1253 if (certfile != NULL) printf("Certificate file = %s\n", certfile);
1254 if (keyfile != NULL) printf("Key file = %s\n", keyfile);
1255 tls_init(US certfile, US keyfile);
1256 tls_session = tls_session_init();
1259 gnutls_ocsp_status_request_enable_client(tls_session, NULL, 0, NULL);
1261 gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr_t)(intptr_t)srv.sock);
1263 /* When the server asks for a certificate and the client does not have one,
1264 there is a SIGPIPE error in the gnutls_handshake() function for some reason
1265 that is not understood. As luck would have it, this has never hit Exim itself
1266 because it ignores SIGPIPE errors. Doing the same here allows it all to work as
1269 signal(SIGPIPE, SIG_IGN);
1272 /* ---------------------------------------------- */
1275 /* Start TLS session if configured to do so without STARTTLS */
1280 printf("Attempting to start TLS\n");
1283 srv.tls_active = tls_start(srv.sock, &srv.ssl, srv.ctx);
1289 sigalrm_seen = FALSE;
1292 rc = gnutls_handshake(tls_session);
1293 } while (rc < 0 && gnutls_error_is_fatal(rc) == 0);
1294 srv.tls_active = rc >= 0;
1297 if (!srv.tls_active) printf("%s\n", gnutls_strerror(rc));
1301 if (!srv.tls_active)
1302 printf("Failed to start TLS\n");
1303 #if defined(HAVE_GNUTLS) && defined(HAVE_OCSP)
1304 else if ( ocsp_stapling
1305 && gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0)
1306 printf("Failed to verify certificate status\n");
1309 printf("Succeeded in starting TLS\n");
1313 do_file(&srv, stdin, timeout, inbuffer, sizeof(inbuffer), inptr);
1315 printf("End of script\n");
1316 shutdown(srv.sock, SHUT_WR);
1317 if (fcntl(srv.sock, F_SETFL, O_NONBLOCK) == 0)
1318 while (read(srv.sock, inbuffer, sizeof(inbuffer)) > 0) ;
1324 /* End of client.c */