X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/1ec3f27dbd09d889f2839d3c24a095dc4efa49ac..1ad6489edabbfce85ee7362370cee4b34739c234:/test/src/client.c diff --git a/test/src/client.c b/test/src/client.c index 58ab56d4c..cd2194af1 100644 --- a/test/src/client.c +++ b/test/src/client.c @@ -1,7 +1,8 @@ /* A little hacked up program that makes a TCP/IP call and reads a script to drive it, for testing Exim server code running as a daemon. It's got a bit messy with the addition of support for either OpenSSL or GnuTLS. The code for -those was hacked out of Exim itself. */ +those was hacked out of Exim itself, then code for OpenSSL OCSP stapling was +ripped from the openssl ocsp and s_client utilities. */ /* ANSI C standard includes */ @@ -57,24 +58,35 @@ static int sigalrm_seen = 0; /* TLS support can be optionally included, either for OpenSSL or GnuTLS. The latter needs a whole pile of tables. */ - #ifdef HAVE_OPENSSL -#define HAVE_TLS -#include -#include -#include -#include -#include -#include +# define HAVE_TLS +# include +# include +# include +# include +# include +# include + +# if OPENSSL_VERSION_NUMBER < 0x0090806fL && !defined(DISABLE_OCSP) && !defined(OPENSSL_NO_TLSEXT) +# warning "OpenSSL library version too old; define DISABLE_OCSP in Makefile" +# define DISABLE_OCSP +# endif +# ifndef DISABLE_OCSP +# include +# endif #endif #ifdef HAVE_GNUTLS -#define HAVE_TLS -#include -#include +# define HAVE_TLS +# include +# include +# if GNUTLS_VERSION_NUMBER >= 0x030103 +# define HAVE_OCSP +# include +# endif -#define DH_BITS 768 +# define DH_BITS 768 /* Local static variables for GNUTLS */ @@ -110,9 +122,13 @@ static const int mac_priority[16] = { static const int comp_priority[16] = { GNUTLS_COMP_NULL, 0 }; static const int cert_type_priority[16] = { GNUTLS_CRT_X509, 0 }; -#endif +#endif /*HAVE_GNUTLS*/ + +#ifdef HAVE_TLS +char * ocsp_stapling = NULL; +#endif /************************************************* @@ -145,22 +161,119 @@ sigalrm_seen = 1; /****************************************************************************/ #ifdef HAVE_OPENSSL + +X509_STORE * +setup_verify(BIO *bp, char *CAfile, char *CApath) +{ + X509_STORE *store; + X509_LOOKUP *lookup; + if(!(store = X509_STORE_new())) goto end; + lookup=X509_STORE_add_lookup(store,X509_LOOKUP_file()); + if (lookup == NULL) goto end; + if (CAfile) { + if(!X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM)) { + BIO_printf(bp, "Error loading file %s\n", CAfile); + goto end; + } + } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT); + + lookup=X509_STORE_add_lookup(store,X509_LOOKUP_hash_dir()); + if (lookup == NULL) goto end; + if (CApath) { + if(!X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM)) { + BIO_printf(bp, "Error loading directory %s\n", CApath); + goto end; + } + } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT); + + ERR_clear_error(); + return store; + end: + X509_STORE_free(store); + return NULL; +} + + +#ifndef DISABLE_OCSP +static int +tls_client_stapling_cb(SSL *s, void *arg) +{ +const unsigned char *p; +int len; +OCSP_RESPONSE *rsp; +OCSP_BASICRESP *bs; +char *CAfile = NULL; +X509_STORE *store = NULL; +int ret = 1; + +len = SSL_get_tlsext_status_ocsp_resp(s, &p); +/*BIO_printf(arg, "OCSP response: ");*/ +if (!p) + { + BIO_printf(arg, "no response received\n"); + return 1; + } +if(!(rsp = d2i_OCSP_RESPONSE(NULL, &p, len))) + { + BIO_printf(arg, "response parse error\n"); + BIO_dump_indent(arg, (char *)p, len, 4); + return 0; + } +if(!(bs = OCSP_response_get1_basic(rsp))) + { + BIO_printf(arg, "error parsing response\n"); + return 0; + } + +CAfile = ocsp_stapling; +if(!(store = setup_verify(arg, CAfile, NULL))) + { + BIO_printf(arg, "error in cert setup\n"); + return 0; + } + +/* No file of alternate certs, no options */ +if(OCSP_basic_verify(bs, NULL, store, 0) <= 0) + { + BIO_printf(arg, "Response Verify Failure\n"); + ERR_print_errors(arg); + ret = 0; + } +else + BIO_printf(arg, "Response verify OK\n"); + +X509_STORE_free(store); +return ret; +} +#endif + + /************************************************* * Start an OpenSSL TLS session * *************************************************/ -int tls_start(int sock, SSL **ssl, SSL_CTX *ctx) +int +tls_start(int sock, SSL **ssl, SSL_CTX *ctx) { int rc; -static const char *sid_ctx = "exim"; +static const unsigned char *sid_ctx = US"exim"; RAND_load_file("client.c", -1); /* Not *very* random! */ *ssl = SSL_new (ctx); -SSL_set_session_id_context(*ssl, sid_ctx, strlen(sid_ctx)); +SSL_set_session_id_context(*ssl, sid_ctx, strlen(CS sid_ctx)); SSL_set_fd (*ssl, sock); SSL_set_connect_state(*ssl); +#ifndef DISABLE_OCSP +if (ocsp_stapling) + { + SSL_CTX_set_tlsext_status_cb(ctx, tls_client_stapling_cb); + SSL_CTX_set_tlsext_status_arg(ctx, BIO_new_fp(stdout, BIO_NOCLOSE)); + SSL_set_tlsext_status_type(*ssl, TLSEXT_STATUSTYPE_ocsp); + } +#endif + signal(SIGALRM, sigalrm_handler_flag); sigalrm_seen = 0; alarm(5); @@ -223,7 +336,7 @@ gnutls_error(uschar *prefix, int err) fprintf(stderr, "GnuTLS connection error: %s:", prefix); if (err != 0) fprintf(stderr, " %s", gnutls_strerror(err)); fprintf(stderr, "\n"); -exit(1); +exit(98); } @@ -256,7 +369,7 @@ fd = open("aux-fixed/gnutls-params", O_RDONLY, 0); if (fd < 0) { fprintf(stderr, "Failed to open spool/gnutls-params: %s\n", strerror(errno)); - exit(1); + exit(97); } if (fstat(fd, &statbuf) < 0) @@ -320,6 +433,11 @@ if (certificate != NULL) /* Associate the parameters with the x509 credentials structure. */ gnutls_certificate_set_dh_params(x509_cred, dh_params); + +/* set the CA info for server-cert verify */ +if (ocsp_stapling) + gnutls_certificate_set_x509_trust_file(x509_cred, ocsp_stapling, + GNUTLS_X509_FMT_PEM); } @@ -381,7 +499,7 @@ char *keyfile = NULL; char *end = NULL; int argi = 1; int host_af, port, s_len, rc, sock, save_errno; -int timeout = 1; +int timeout = 5; int tls_active = 0; int sent_starttls = 0; int tls_on_connect = 0; @@ -410,7 +528,7 @@ while (argc >= argi + 1 && argv[argi][0] == '-') strcmp(argv[argi], "--help") == 0 || strcmp(argv[argi], "-h") == 0) { - printf(HELP_MESSAGE); + puts(HELP_MESSAGE); exit(0); } if (strcmp(argv[argi], "-tls-on-connect") == 0) @@ -418,6 +536,18 @@ while (argc >= argi + 1 && argv[argi][0] == '-') tls_on_connect = 1; argi++; } +#ifdef HAVE_TLS + else if (strcmp(argv[argi], "-ocsp") == 0) + { + if (argc < ++argi + 1) + { + fprintf(stderr, "Missing required certificate file for ocsp option\n"); + exit(96); + } + ocsp_stapling = argv[argi++]; + } + +#endif else if (argv[argi][1] == 't' && isdigit(argv[argi][2])) { tmplong = strtol(argv[argi]+2, &end, 10); @@ -425,18 +555,18 @@ while (argc >= argi + 1 && argv[argi][0] == '-') { fprintf(stderr, "Failed to parse seconds from option <%s>\n", argv[argi]); - exit(1); + exit(95); } if (tmplong > 10000L) { - fprintf(stderr, "Unreasonably long wait of %d seconds requested\n", + fprintf(stderr, "Unreasonably long wait of %ld seconds requested\n", tmplong); - exit(1); + exit(94); } if (tmplong < 0L) { - fprintf(stderr, "Timeout must not be negative (%d)\n", tmplong); - exit(1); + fprintf(stderr, "Timeout must not be negative (%ld)\n", tmplong); + exit(93); } timeout = (int) tmplong; argi++; @@ -444,7 +574,7 @@ while (argc >= argi + 1 && argv[argi][0] == '-') else { fprintf(stderr, "Unrecognized option %s\n", argv[argi]); - exit(1); + exit(92); } } @@ -453,7 +583,7 @@ while (argc >= argi + 1 && argv[argi][0] == '-') if (argc < argi+1) { fprintf(stderr, "No IP address given\n"); - exit(1); + exit(91); } address = argv[argi++]; @@ -464,7 +594,7 @@ host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET; if (argc < argi+1) { fprintf(stderr, "No port number given\n"); - exit(1); + exit(90); } port = atoi(argv[argi++]); @@ -506,7 +636,7 @@ sock = socket(host_af, SOCK_STREAM, 0); if (sock < 0) { printf("socket creation failed: %s\n", strerror(errno)); - exit(1); + exit(89); } /* Bind to a specific interface if requested. On an IPv6 system, this has @@ -531,7 +661,7 @@ if (interface != NULL) if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1) { printf("Unable to parse \"%s\"", interface); - exit(1); + exit(88); } } else @@ -552,7 +682,7 @@ if (interface != NULL) { printf("Unable to bind outgoing SMTP call to %s: %s", interface, strerror(errno)); - exit(1); + exit(87); } } } @@ -568,7 +698,7 @@ if (host_af == AF_INET6) if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1) { printf("Unable to parse \"%s\"", address); - exit(1); + exit(86); } } else @@ -597,8 +727,8 @@ an externally applied timeout if the signal handler has been run. */ if (rc < 0) { close(sock); - printf("failed: %s\n", strerror(save_errno)); - exit(1); + printf("connect failed: %s\n", strerror(save_errno)); + exit(85); } printf("connected\n"); @@ -614,7 +744,7 @@ ctx = SSL_CTX_new(SSLv23_method()); if (ctx == NULL) { printf ("SSL_CTX_new failed\n"); - exit(1); + exit(84); } if (certfile != NULL) @@ -622,7 +752,7 @@ if (certfile != NULL) if (!SSL_CTX_use_certificate_file(ctx, certfile, SSL_FILETYPE_PEM)) { printf("SSL_CTX_use_certificate_file failed\n"); - exit(1); + exit(83); } printf("Certificate file = %s\n", certfile); } @@ -632,7 +762,7 @@ if (keyfile != NULL) if (!SSL_CTX_use_PrivateKey_file(ctx, keyfile, SSL_FILETYPE_PEM)) { printf("SSL_CTX_use_PrivateKey_file failed\n"); - exit(1); + exit(82); } printf("Key file = %s\n", keyfile); } @@ -650,6 +780,10 @@ if (certfile != NULL) printf("Certificate file = %s\n", certfile); if (keyfile != NULL) printf("Key file = %s\n", keyfile); tls_init(certfile, keyfile); tls_session = tls_session_init(); +#ifdef HAVE_OCSP +if (ocsp_stapling) + gnutls_ocsp_status_request_enable_client(tls_session, NULL, 0, NULL); +#endif gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr)sock); /* When the server asks for a certificate and the client does not have one, @@ -684,20 +818,25 @@ if (tls_on_connect) if (!tls_active) printf("Failed to start TLS\n"); + #if defined(HAVE_GNUTLS) && defined(HAVE_OCSP) + else if ( ocsp_stapling + && gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) + printf("Failed to verify certificate status\n"); + #endif else printf("Succeeded in starting TLS\n"); } #endif -while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL) +while (fgets(CS outbuffer, sizeof(outbuffer), stdin) != NULL) { - int n = (int)strlen(outbuffer); + int n = (int)strlen(CS outbuffer); while (n > 0 && isspace(outbuffer[n-1])) n--; outbuffer[n] = 0; /* Expect incoming */ - if (strncmp(outbuffer, "??? ", 4) == 0) + if (strncmp(CS outbuffer, "??? ", 4) == 0) { unsigned char *lineptr; printf("%s\n", outbuffer); @@ -723,13 +862,13 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL) if (rc < 0) { printf("Read error %s\n", strerror(errno)); - exit(1) ; + exit(81) ; } else if (rc == 0) { printf("Unexpected EOF read\n"); close(sock); - exit(1); + exit(80); } else { @@ -747,10 +886,10 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL) } printf("<<< %s\n", lineptr); - if (strncmp(lineptr, outbuffer + 4, (int)strlen(outbuffer) - 4) != 0) + if (strncmp(CS lineptr, CS outbuffer + 4, (int)strlen(CS outbuffer) - 4) != 0) { printf("\n******** Input mismatch ********\n"); - exit(1); + exit(79); } #ifdef HAVE_TLS @@ -758,6 +897,9 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL) { if (lineptr[0] == '2') { +int rc; + unsigned int verify; + printf("Attempting to start TLS\n"); fflush(stdout); @@ -777,6 +919,44 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL) printf("Failed to start TLS\n"); fflush(stdout); } + #ifdef HAVE_GNUTLS + else if (ocsp_stapling) + { + if ((rc= gnutls_certificate_verify_peers2(tls_session, &verify)) < 0) + { + printf("Failed to verify certificate: %s\n", gnutls_strerror(rc)); + fflush(stdout); + } + else if (verify & (GNUTLS_CERT_INVALID|GNUTLS_CERT_REVOKED)) + { + printf("Bad certificate\n"); + fflush(stdout); + } + #ifdef HAVE_OCSP + else if (gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0) + { + printf("Failed to verify certificate status\n"); + { + gnutls_datum_t stapling; + gnutls_ocsp_resp_t resp; + gnutls_datum_t printed; + if ( (rc= gnutls_ocsp_status_request_get(tls_session, &stapling)) == 0 + && (rc= gnutls_ocsp_resp_init(&resp)) == 0 + && (rc= gnutls_ocsp_resp_import(resp, &stapling)) == 0 + && (rc= gnutls_ocsp_resp_print(resp, GNUTLS_OCSP_PRINT_FULL, &printed)) == 0 + ) + { + fprintf(stderr, "%.4096s", printed.data); + gnutls_free(printed.data); + } + else + (void) fprintf(stderr,"ocsp decode: %s", gnutls_strerror(rc)); + } + fflush(stdout); + } + #endif + } + #endif else printf("Succeeded in starting TLS\n"); } @@ -788,10 +968,10 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL) /* Wait for a bit before proceeding */ - else if (strncmp(outbuffer, "+++ ", 4) == 0) + else if (strncmp(CS outbuffer, "+++ ", 4) == 0) { printf("%s\n", outbuffer); - sleep(atoi(outbuffer + 4)); + sleep(atoi(CS outbuffer + 4)); } /* Send outgoing, but barf if unconsumed incoming */ @@ -804,20 +984,20 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL) { printf("Unconsumed input: %s", inptr); printf(" About to send: %s\n", outbuffer); - exit(1); + exit(78); } #ifdef HAVE_TLS /* Shutdown TLS */ - if (strcmp(outbuffer, "stoptls") == 0 || - strcmp(outbuffer, "STOPTLS") == 0) + if (strcmp(CS outbuffer, "stoptls") == 0 || + strcmp(CS outbuffer, "STOPTLS") == 0) { if (!tls_active) { printf("STOPTLS read when TLS not active\n"); - exit(1); + exit(77); } printf("Shutting down TLS encryption\n"); @@ -839,14 +1019,14 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL) /* Remember that we sent STARTTLS */ - sent_starttls = (strcmp(outbuffer, "starttls") == 0 || - strcmp(outbuffer, "STARTTLS") == 0); + sent_starttls = (strcmp(CS outbuffer, "starttls") == 0 || + strcmp(CS outbuffer, "STARTTLS") == 0); /* Fudge: if the command is "starttls_wait", we send the starttls bit, but we haven't set the flag, so that there is no negotiation. This is for testing the server's timeout. */ - if (strcmp(outbuffer, "starttls_wait") == 0) + if (strcmp(CS outbuffer, "starttls_wait") == 0) { outbuffer[8] = 0; n = 8; @@ -854,18 +1034,18 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL) #endif printf(">>> %s\n", outbuffer); - strcpy(outbuffer + n, "\r\n"); + strcpy(CS outbuffer + n, "\r\n"); /* Turn "\n" and "\r" into the relevant characters. This is a hack. */ - while ((escape = strstr(outbuffer, "\\r")) != NULL) + while ((escape = US strstr(CS outbuffer, "\\r")) != NULL) { *escape = '\r'; memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); n--; } - while ((escape = strstr(outbuffer, "\\n")) != NULL) + while ((escape = US strstr(CS outbuffer, "\\n")) != NULL) { *escape = '\n'; memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2); @@ -885,7 +1065,7 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL) if (rc < 0) { printf("GnuTLS write error: %s\n", gnutls_strerror(rc)); - exit(1); + exit(76); } #endif } @@ -898,7 +1078,7 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL) if (rc < 0) { printf("Write error: %s\n", strerror(errno)); - exit(1); + exit(75); } } }