#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
+#include <netinet/tcp.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <utime.h>
+/* Set to TRUE to enable debug output */
+#define DEBUG if (FALSE)
+
#ifdef AF_INET6
#define HAVE_IPV6 1
#endif
/* Priorities for TLS algorithms to use. */
-#if GNUTLS_VERSION_NUMBER < 0x030400
+# if GNUTLS_VERSION_NUMBER < 0x030400
static const int protocol_priority[16] = { GNUTLS_TLS1, GNUTLS_SSL3, 0 };
static const int kx_priority[16] = {
0 };
static const int comp_priority[16] = { GNUTLS_COMP_NULL, 0 };
-#endif
+# endif
#endif /*HAVE_GNUTLS*/
#ifdef HAVE_TLS
char * ocsp_stapling = NULL;
+char * pri_string = NULL;
#endif
/****************************************************************************/
#ifdef HAVE_OPENSSL
+# ifndef DISABLE_OCSP
-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 STACK_OF(X509) *
-cert_stack_from_store(X509_STORE * store)
+chain_from_pem_file(const uschar * file)
{
-STACK_OF(X509_OBJECT) * roots= store->objs;
-STACK_OF(X509) * sk = sk_X509_new_null();
-int i;
+BIO * bp;
+X509 * x;
+STACK_OF(X509) * sk;
-for(i = sk_X509_OBJECT_num(roots) - 1; i >= 0; i--)
- {
- X509_OBJECT * tmp_obj= sk_X509_OBJECT_value(roots, i);
- if(tmp_obj->type == X509_LU_X509)
- {
- X509 * x = tmp_obj->data.x509;
- sk_X509_push(sk, x);
- }
- }
+if (!(sk = sk_X509_new_null())) return NULL;
+if (!(bp = BIO_new_file(CS file, "r"))) return NULL;
+while ((x = PEM_read_bio_X509(bp, NULL, 0, NULL)))
+ sk_X509_push(sk, x);
+BIO_free(bp);
return sk;
}
+
+
static void
cert_stack_free(STACK_OF(X509) * sk)
{
int len;
OCSP_RESPONSE *rsp;
OCSP_BASICRESP *bs;
-char *CAfile = NULL;
-X509_STORE *store = NULL;
STACK_OF(X509) * sk;
int ret = 1;
}
-CAfile = ocsp_stapling;
-if(!(store = setup_verify(arg, CAfile, NULL)))
+if (!(sk = chain_from_pem_file((const uschar *)ocsp_stapling)))
{
BIO_printf(arg, "error in cert setup\n");
return 0;
}
-sk = cert_stack_from_store(store);
-
/* OCSP_basic_verify takes a "store" arg, but does not
use it for the chain verification, which is all we do
when OCSP_NOVERIFY is set. The content from the wire
BIO_printf(arg, "Response verify OK\n");
cert_stack_free(sk);
-X509_STORE_free(store);
return ret;
}
-#endif
+# endif /*DISABLE_OCSP*/
/*************************************************
return 0;
}
-printf("SSL connection using %s\n", SSL_get_cipher (*ssl));
+/* printf("SSL connection using %s\n", SSL_get_cipher (*ssl)); */
return 1;
}
{
rc = gnutls_certificate_set_x509_key_file(x509_cred, CS certificate,
CS privatekey, GNUTLS_X509_FMT_PEM);
- if (rc < 0) gnutls_error("gnutls_certificate", rc);
+ if (rc < 0) gnutls_error(US"gnutls_certificate", rc);
}
/* Associate the parameters with the x509 credentials structure. */
gnutls_init(&session, GNUTLS_CLIENT | GNUTLS_NO_EXTENSIONS);
-#if GNUTLS_VERSION_NUMBER < 0x030400
+# if GNUTLS_VERSION_NUMBER < 0x030400
gnutls_cipher_set_priority(session, default_cipher_priority);
gnutls_compression_set_priority(session, comp_priority);
gnutls_kx_set_priority(session, kx_priority);
gnutls_mac_set_priority(session, mac_priority);
gnutls_cred_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
-#else
-gnutls_set_default_priority(session);
+# else
+if (pri_string)
+ {
+ gnutls_priority_t priority_cache;
+ const char * errpos;
+
+ gnutls_priority_init(&priority_cache, pri_string, &errpos);
+ gnutls_priority_set(session, priority_cache);
+ }
+else
+ gnutls_set_default_priority(session);
gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
-#endif
+# endif
gnutls_dh_set_prime_bits(session, DH_BITS);
gnutls_db_set_cache_expiration(session, ssl_session_timeout);
/****************************************************************************/
-/****************************************************************************/
-
-
-
-
-/*************************************************
-* Main Program *
-*************************************************/
+/* Turn "\n" and "\r" into the relevant characters. This is a hack. */
-const char * const HELP_MESSAGE = "\n\
-Usage: client\n"
-#ifdef HAVE_TLS
-"\
- [-tls-on-connect]\n\
- [-ocsp]\n"
-#endif
-"\
- [-tn] n seconds timeout\n\
- <IP address>\n\
- <port>\n\
- [<outgoing interface>]\n\
- [<cert file>]\n\
- [<key file>]\n\
-\n";
-
-int main(int argc, char **argv)
+static int
+unescape_buf(unsigned char * buf, int len)
{
-struct sockaddr *s_ptr;
-struct sockaddr_in s_in4;
-char *interface = NULL;
-char *address = NULL;
-char *certfile = NULL;
-char *keyfile = NULL;
-char *end = NULL;
-int argi = 1;
-int host_af, port, s_len, rc, sock, save_errno;
-int timeout = 5;
-int tls_active = 0;
-int sent_starttls = 0;
-int tls_on_connect = 0;
-long tmplong;
-
-#if HAVE_IPV6
-struct sockaddr_in6 s_in6;
-#endif
+unsigned char * s;
+unsigned char c, t;
+unsigned shift;
-#ifdef HAVE_OPENSSL
-SSL_CTX* ctx;
-SSL* ssl;
-#endif
-
-unsigned char outbuffer[10240];
-unsigned char inbuffer[10240];
-unsigned char *inptr = inbuffer;
-
-*inptr = 0; /* Buffer empty */
-
-/* Options */
-
-while (argc >= argi + 1 && argv[argi][0] == '-')
+for (s = buf; s < buf+len; s++) if (*s == '\\')
{
- if (strcmp(argv[argi], "-help") == 0 ||
- strcmp(argv[argi], "--help") == 0 ||
- strcmp(argv[argi], "-h") == 0)
- {
- puts(HELP_MESSAGE);
- exit(0);
- }
- if (strcmp(argv[argi], "-tls-on-connect") == 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);
- if (end == argv[argi]+2 || *end)
- {
- fprintf(stderr, "Failed to parse seconds from option <%s>\n",
- argv[argi]);
- exit(95);
- }
- if (tmplong > 10000L)
- {
- fprintf(stderr, "Unreasonably long wait of %ld seconds requested\n",
- tmplong);
- exit(94);
- }
- if (tmplong < 0L)
- {
- fprintf(stderr, "Timeout must not be negative (%ld)\n", tmplong);
- exit(93);
- }
- timeout = (int) tmplong;
- argi++;
- }
- else
+ switch (s[1])
{
- fprintf(stderr, "Unrecognized option %s\n", argv[argi]);
- exit(92);
+ default: c = s[1]; shift = 1; break;
+ case 'n': c = '\n'; shift = 1; break;
+ case 'r': c = '\r'; shift = 1; break;
+ case 'x':
+ t = s[2];
+ if (t >= 'A' && t <= 'F') t -= 'A'-'9'-1;
+ else if (t >= 'a' && t <= 'f') t -= 'a'-'9'-1;
+ t -= '0';
+ c = (t<<4) & 0xf0;
+ t = s[3];
+ if (t >= 'A' && t <= 'F') t -= 'A'-'9'-1;
+ else if (t >= 'a' && t <= 'f') t -= 'a'-'9'-1;
+ t -= '0';
+ c |= t & 0xf;
+ shift = 3;
+ break;
}
+ *s = c;
+ memmove(s+1, s+shift+1, len-shift);
+ len -= shift;
}
+return len;
+}
-/* Mandatory 1st arg is IP address */
-
-if (argc < argi+1)
- {
- fprintf(stderr, "No IP address given\n");
- exit(91);
- }
-address = argv[argi++];
-host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET;
+/****************************************************************************/
+typedef struct {
+ int sock;
+ int tls_active;
+#ifdef HAVE_OPENSSL
+ SSL_CTX * ctx;
+ SSL * ssl;
+#endif
+ int sent_starttls;
+} srv_ctx;
-/* Mandatory 2nd arg is port */
+static void
+do_file(srv_ctx * srv, FILE * f, int timeout,
+ unsigned char * inbuffer, unsigned bsiz, unsigned char * inptr)
+{
+unsigned char outbuffer[1024 * 20];
-if (argc < argi+1)
+while (fgets(CS outbuffer, sizeof(outbuffer), f) != NULL)
{
- fprintf(stderr, "No port number given\n");
- exit(90);
- }
-
-port = atoi(argv[argi++]);
-
-/* Optional next arg is interface */
+ int n = (int)strlen(CS outbuffer);
+ int crlf = 1;
+ int rc;
-if (argc > argi &&
- (isdigit((unsigned char)argv[argi][0]) || argv[argi][0] == ':'))
- interface = argv[argi++];
+ /* Strip trailing newline */
+ if (outbuffer[n-1] == '\n') outbuffer[--n] = 0;
-/* Any more arguments are the name of a certificate file and key file */
+ /* Expect incoming */
-if (argc > argi) certfile = argv[argi++];
-if (argc > argi) keyfile = argv[argi++];
+ if ( strncmp(CS outbuffer, "???", 3) == 0
+ && (outbuffer[3] == ' ' || outbuffer[3] == '*' || outbuffer[3] == '?')
+ )
+ {
+ unsigned char *lineptr;
+ unsigned exp_eof = outbuffer[3] == '*';
+ unsigned resp_optional = outbuffer[3] == '?';
+ printf("%s\n", outbuffer);
+ n = unescape_buf(outbuffer, n);
-#if HAVE_IPV6
-/* For an IPv6 address, use an IPv6 sockaddr structure. */
+nextinput:
+ if (*inptr == 0) /* Refill input buffer */
+ {
+ unsigned char *inbufferp = inbuffer;
-if (host_af == AF_INET6)
- {
- s_ptr = (struct sockaddr *)&s_in6;
- s_len = sizeof(s_in6);
- }
-else
+ alarm(timeout);
+ for (;;)
+ {
+ if (srv->tls_active)
+ {
+#ifdef HAVE_OPENSSL
+ int error;
+ DEBUG { printf("call SSL_read\n"); fflush(stdout); }
+ rc = SSL_read(srv->ssl, inbufferp, bsiz - (inbufferp - inbuffer) - 1);
+ DEBUG { printf("SSL_read: %d\n", rc); fflush(stdout); }
+ if (rc <= 0)
+ switch (error = SSL_get_error(srv->ssl, rc))
+ {
+ case SSL_ERROR_ZERO_RETURN:
+ break;
+ case SSL_ERROR_SYSCALL:
+ printf("%s\n", ERR_error_string(ERR_get_error(), NULL));
+ rc = -1;
+ break;
+ case SSL_ERROR_SSL:
+ printf("%s\nTLS terminated\n", ERR_error_string(ERR_get_error(), NULL));
+ SSL_shutdown(srv->ssl);
+ SSL_free(srv->ssl);
+ srv->tls_active = FALSE;
+ { /* OpenSSL leaves it in restartsys mode */
+ struct sigaction act = {.sa_handler = sigalrm_handler_flag, .sa_flags = 0};
+ sigalrm_seen = 1;
+ sigaction(SIGALRM, &act, NULL);
+ }
+ *inptr = 0;
+ DEBUG { printf("go round\n"); fflush(stdout); }
+ goto nextinput;
+ default:
+ printf("SSL error code %d\n", error);
+ }
+#endif
+#ifdef HAVE_GNUTLS
+ retry1:
+ DEBUG { printf("call gnutls_record_recv\n"); fflush(stdout); }
+ rc = gnutls_record_recv(tls_session, CS inbufferp, bsiz - (inbufferp - inbuffer) - 1);
+ if (rc < 0)
+ {
+ DEBUG { printf("gnutls_record_recv: %s\n", gnutls_strerror(rc)); fflush(stdout); }
+ if (rc == GNUTLS_E_INTERRUPTED || rc == GNUTLS_E_AGAIN)
+ goto retry1;
+ printf("%s\n", gnutls_strerror(rc));
+ srv->tls_active = FALSE;
+ *inptr = 0;
+ DEBUG { printf("go round\n"); fflush(stdout); }
+ goto nextinput;
+ }
+ DEBUG { printf("gnutls_record_recv: %d\n", rc); fflush(stdout); }
#endif
+ }
+ else
+ {
+ DEBUG { printf("call read\n"); fflush(stdout); }
+ rc = read(srv->sock, inbufferp, bsiz - (inbufferp - inbuffer) - 1);
+ DEBUG { printf("read: %d\n", rc); fflush(stdout); }
+ }
-/* For an IPv4 address, use an IPv4 sockaddr structure,
-even on an IPv6 system. */
+ if (rc > 0) inbufferp[rc] = '\0';
+ if (rc <= 0 || strchr(inbufferp, '\n')) break;
+ inbufferp += rc;
+ if (inbufferp >= inbuffer + bsiz)
+ {
+ printf("Input buffer overrun, need more than %d bytes input buffer\n", bsiz);
+ exit(73);
+ }
+ DEBUG { printf("read more\n"); }
+ }
+ alarm(0);
- {
- s_ptr = (struct sockaddr *)&s_in4;
- s_len = sizeof(s_in4);
- }
+ if (rc < 0)
+ {
+ if (errno == EINTR && sigalrm_seen && resp_optional)
+ continue; /* next scriptline */
+ printf("Read error: %s\n", strerror(errno));
+ exit(81);
+ }
+ else if (rc == 0)
+ if (exp_eof)
+ {
+ printf("Expected EOF read\n");
+ continue;
+ }
+ else if (resp_optional)
+ continue; /* next scriptline */
+ else
+ {
+ printf("Unexpected EOF read\n");
+ close(srv->sock);
+ exit(80);
+ }
+ else if (exp_eof)
+ {
+ printf("Expected EOF not read\n");
+ close(srv->sock);
+ exit(74);
+ }
+ else
+ inptr = inbuffer;
+ }
+ DEBUG { printf("read: '%s'\n", inptr); fflush(stdout); }
-printf("Connecting to %s port %d ... ", address, port);
+ lineptr = inptr;
+ while (*inptr != 0 && *inptr != '\r' && *inptr != '\n') inptr++;
+ if (*inptr != 0)
+ {
+ *inptr++ = 0;
+ if (*inptr == '\n') inptr++;
+ }
-sock = socket(host_af, SOCK_STREAM, 0);
-if (sock < 0)
- {
- printf("socket creation failed: %s\n", strerror(errno));
- exit(89);
- }
+ if (strncmp(CS lineptr, CS outbuffer + 4, n - 4) != 0)
+ if (resp_optional)
+ {
+ inptr = lineptr; /* consume scriptline, not inputline */
+ continue;
+ }
+ else
+ {
+ printf("<<< %s\n", lineptr);
+ printf("\n******** Input mismatch ********\n");
+ exit(79);
+ }
-/* Bind to a specific interface if requested. On an IPv6 system, this has
-to be of the same family as the address we are calling. On an IPv4 system the
-test is redundant, but it keeps the code tidier. */
+ /* Input matched script. Output the inputline, unless optional */
+ DEBUG { printf("read matched\n"); fflush(stdout); }
-if (interface != NULL)
- {
- int interface_af = (strchr(interface, ':') != NULL)? AF_INET6 : AF_INET;
+ if (!resp_optional)
+ printf("<<< %s\n", lineptr);
+ else
- if (interface_af == host_af)
- {
- #if HAVE_IPV6
+ /* If there is further input after this line, consume inputline but not
+ scriptline in case there are several matching. Nonmatches are dealt with
+ above. */
- /* Set up for IPv6 binding */
+ if (*inptr != 0)
+ goto nextinput;
- if (host_af == AF_INET6)
+ #ifdef HAVE_TLS
+ if (srv->sent_starttls)
{
- memset(&s_in6, 0, sizeof(s_in6));
- s_in6.sin6_family = AF_INET6;
- s_in6.sin6_port = 0;
- if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1)
+ if (lineptr[0] == '2')
{
- printf("Unable to parse \"%s\"", interface);
- exit(88);
- }
- }
- else
- #endif
+ unsigned int verify;
- /* Set up for IPv4 binding */
-
- {
- memset(&s_in4, 0, sizeof(s_in4));
- s_in4.sin_family = AF_INET;
- s_in4.sin_port = 0;
- s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(interface);
- }
-
- /* Bind */
-
- if (bind(sock, s_ptr, s_len) < 0)
- {
- printf("Unable to bind outgoing SMTP call to %s: %s",
- interface, strerror(errno));
- exit(87);
- }
- }
- }
-
-/* Set up a remote IPv6 address */
-
-#if HAVE_IPV6
-if (host_af == AF_INET6)
- {
- memset(&s_in6, 0, sizeof(s_in6));
- s_in6.sin6_family = AF_INET6;
- s_in6.sin6_port = htons(port);
- if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1)
- {
- printf("Unable to parse \"%s\"", address);
- exit(86);
- }
- }
-else
-#endif
-
-/* Set up a remote IPv4 address */
-
- {
- memset(&s_in4, 0, sizeof(s_in4));
- s_in4.sin_family = AF_INET;
- s_in4.sin_port = htons(port);
- s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(address);
- }
-
-/* SIGALRM handler crashes out */
-
-signal(SIGALRM, sigalrm_handler_crash);
-alarm(timeout);
-rc = connect(sock, s_ptr, s_len);
-save_errno = errno;
-alarm(0);
-
-/* A failure whose error code is "Interrupted system call" is in fact
-an externally applied timeout if the signal handler has been run. */
-
-if (rc < 0)
- {
- close(sock);
- printf("connect failed: %s\n", strerror(save_errno));
- exit(85);
- }
-
-printf("connected\n");
-
-
-/* --------------- Set up for OpenSSL --------------- */
-
-#ifdef HAVE_OPENSSL
-SSL_library_init();
-SSL_load_error_strings();
-
-ctx = SSL_CTX_new(SSLv23_method());
-if (ctx == NULL)
- {
- printf ("SSL_CTX_new failed\n");
- exit(84);
- }
-
-if (certfile != NULL)
- {
- if (!SSL_CTX_use_certificate_file(ctx, certfile, SSL_FILETYPE_PEM))
- {
- printf("SSL_CTX_use_certificate_file failed\n");
- exit(83);
- }
- printf("Certificate file = %s\n", certfile);
- }
-
-if (keyfile != NULL)
- {
- if (!SSL_CTX_use_PrivateKey_file(ctx, keyfile, SSL_FILETYPE_PEM))
- {
- printf("SSL_CTX_use_PrivateKey_file failed\n");
- exit(82);
- }
- printf("Key file = %s\n", keyfile);
- }
-
-SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_BOTH);
-SSL_CTX_set_timeout(ctx, 200);
-SSL_CTX_set_info_callback(ctx, (void (*)())info_callback);
-#endif
-
-
-/* --------------- Set up for GnuTLS --------------- */
-
-#ifdef HAVE_GNUTLS
-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_t)(intptr_t)sock);
-
-/* When the server asks for a certificate and the client does not have one,
-there is a SIGPIPE error in the gnutls_handshake() function for some reason
-that is not understood. As luck would have it, this has never hit Exim itself
-because it ignores SIGPIPE errors. Doing the same here allows it all to work as
-one wants. */
-
-signal(SIGPIPE, SIG_IGN);
-#endif
-
-/* ---------------------------------------------- */
-
-
-/* Start TLS session if configured to do so without STARTTLS */
-
-#ifdef HAVE_TLS
-if (tls_on_connect)
- {
- printf("Attempting to start TLS\n");
-
-#ifdef HAVE_OPENSSL
- tls_active = tls_start(sock, &ssl, ctx);
-#endif
-
-#ifdef HAVE_GNUTLS
- {
- int rc;
- sigalrm_seen = FALSE;
- alarm(timeout);
- do {
- rc = gnutls_handshake(tls_session);
- } while (rc < 0 && gnutls_error_is_fatal(rc) == 0);
- tls_active = rc >= 0;
- alarm(0);
-
- if (!tls_active) printf("%s\n", gnutls_strerror(rc));
- }
-#endif
-
- 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(CS outbuffer, sizeof(outbuffer), stdin) != NULL)
- {
- int n = (int)strlen(CS outbuffer);
-
- /* Strip trailing newline */
- if (outbuffer[n-1] == '\n') outbuffer[--n] = 0;
-
- /* Expect incoming */
-
- if (strncmp(CS outbuffer, "??? ", 4) == 0)
- {
- unsigned char *lineptr;
- printf("%s\n", outbuffer);
-
- if (*inptr == 0) /* Refill input buffer */
- {
- if (tls_active)
- {
- #ifdef HAVE_OPENSSL
- rc = SSL_read (ssl, inbuffer, sizeof(inbuffer) - 1);
- #endif
- #ifdef HAVE_GNUTLS
- rc = gnutls_record_recv(tls_session, CS inbuffer, sizeof(inbuffer) - 1);
- #endif
- }
- else
- {
- alarm(timeout);
- rc = read(sock, inbuffer, sizeof(inbuffer));
- alarm(0);
- }
-
- if (rc < 0)
- {
- printf("Read error %s\n", strerror(errno));
- exit(81) ;
- }
- else if (rc == 0)
- {
- printf("Unexpected EOF read\n");
- close(sock);
- exit(80);
- }
- else
- {
- inbuffer[rc] = 0;
- inptr = inbuffer;
- }
- }
-
- lineptr = inptr;
- while (*inptr != 0 && *inptr != '\r' && *inptr != '\n') inptr++;
- if (*inptr != 0)
- {
- *inptr++ = 0;
- if (*inptr == '\n') inptr++;
- }
-
- printf("<<< %s\n", lineptr);
- if (strncmp(CS lineptr, CS outbuffer + 4, (int)strlen(CS outbuffer) - 4) != 0)
- {
- printf("\n******** Input mismatch ********\n");
- exit(79);
- }
-
- #ifdef HAVE_TLS
- if (sent_starttls)
- {
- if (lineptr[0] == '2')
- {
-int rc;
- unsigned int verify;
-
- printf("Attempting to start TLS\n");
- fflush(stdout);
+ printf("Attempting to start TLS\n");
+ fflush(stdout);
#ifdef HAVE_OPENSSL
- tls_active = tls_start(sock, &ssl, ctx);
+ srv->tls_active = tls_start(srv->sock, &srv->ssl, srv->ctx);
#endif
#ifdef HAVE_GNUTLS
{
int rc;
+ fd_set rfd;
+ struct timeval tv = { 0, 2000 };
+
sigalrm_seen = FALSE;
alarm(timeout);
do {
rc = gnutls_handshake(tls_session);
} while (rc < 0 && gnutls_error_is_fatal(rc) == 0);
- tls_active = rc >= 0;
+ srv->tls_active = rc >= 0;
alarm(0);
- if (!tls_active) printf("%s\n", gnutls_strerror(rc));
+ if (!srv->tls_active) printf("%s\n", gnutls_strerror(rc));
+
+ /* look for an error on the TLS conn */
+ FD_ZERO(&rfd);
+ FD_SET(srv->sock, &rfd);
+ if (select(srv->sock+1, &rfd, NULL, NULL, &tv) > 0)
+ {
+ retry2:
+ DEBUG { printf("call gnutls_record_recv\n"); fflush(stdout); }
+ rc = gnutls_record_recv(tls_session, CS inbuffer, bsiz - 1);
+ if (rc < 0)
+ {
+ DEBUG { printf("gnutls_record_recv: %s\n", gnutls_strerror(rc)); fflush(stdout); }
+ if (rc == GNUTLS_E_INTERRUPTED || rc == GNUTLS_E_AGAIN)
+ goto retry2;
+ printf("%s\n", gnutls_strerror(rc));
+ srv->tls_active = FALSE;
+ }
+ DEBUG { printf("gnutls_record_recv: %d\n", rc); fflush(stdout); }
+ }
}
#endif
- if (!tls_active)
+ if (!srv->tls_active)
{
printf("Failed to start TLS\n");
fflush(stdout);
}
else printf("Abandoning TLS start attempt\n");
}
- sent_starttls = 0;
+ srv->sent_starttls = 0;
#endif
}
sleep(atoi(CS outbuffer + 4));
}
- /* Send outgoing, but barf if unconsumed incoming */
+ /* Stack new input file */
+
+ else if (strncmp(CS outbuffer, "<<< ", 4) == 0)
+ {
+ FILE * new_f;
+ if (!(new_f = fopen((const char *)outbuffer+4 , "r")))
+ {
+ printf("Unable to open '%s': %s", inptr, strerror(errno));
+ exit(74);
+ }
+ do_file(srv, new_f, timeout, inbuffer, bsiz, inptr);
+ }
+
+
+ /* Send line outgoing, but barf if unconsumed incoming */
else
{
- unsigned char *escape;
+ unsigned char * out = outbuffer;
+
+ if (strncmp(CS outbuffer, ">>> ", 4) == 0)
+ {
+ crlf = 0;
+ out += 4;
+ n -= 4;
+ }
if (*inptr != 0)
{
printf("Unconsumed input: %s", inptr);
- printf(" About to send: %s\n", outbuffer);
+ printf(" About to send: %s\n", out);
exit(78);
}
/* Shutdown TLS */
- if (strcmp(CS outbuffer, "stoptls") == 0 ||
- strcmp(CS outbuffer, "STOPTLS") == 0)
+ if (strcmp(CS out, "stoptls") == 0 ||
+ strcmp(CS out, "STOPTLS") == 0)
{
- if (!tls_active)
+ if (!srv->tls_active)
{
printf("STOPTLS read when TLS not active\n");
exit(77);
printf("Shutting down TLS encryption\n");
#ifdef HAVE_OPENSSL
- SSL_shutdown(ssl);
- SSL_free(ssl);
+ SSL_shutdown(srv->ssl);
+ SSL_free(srv->ssl);
#endif
#ifdef HAVE_GNUTLS
gnutls_global_deinit();
#endif
- tls_active = 0;
+ srv->tls_active = 0;
continue;
}
/* Remember that we sent STARTTLS */
- sent_starttls = (strcmp(CS outbuffer, "starttls") == 0 ||
- strcmp(CS outbuffer, "STARTTLS") == 0);
+ srv->sent_starttls = (strcmp(CS out, "starttls") == 0 ||
+ strcmp(CS out, "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(CS outbuffer, "starttls_wait") == 0)
+ if (strcmp(CS out, "starttls_wait") == 0)
{
- outbuffer[8] = 0;
+ out[8] = 0;
n = 8;
}
#endif
- printf(">>> %s\n", outbuffer);
- strcpy(CS outbuffer + n, "\r\n");
-
- /* Turn "\n" and "\r" into the relevant characters. This is a hack. */
-
- while ((escape = US strstr(CS outbuffer, "\\r")) != NULL)
+ printf(">>> %s\n", out);
+ if (crlf)
{
- *escape = '\r';
- memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2);
- n--;
+ strcpy(CS out + n, "\r\n");
+ n += 2;
}
- while ((escape = US strstr(CS outbuffer, "\\n")) != NULL)
- {
- *escape = '\n';
- memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2);
- n--;
- }
+ n = unescape_buf(out, n);
/* OK, do it */
alarm(timeout);
- if (tls_active)
+ if (srv->tls_active)
{
#ifdef HAVE_OPENSSL
- rc = SSL_write (ssl, outbuffer, n + 2);
+ rc = SSL_write (srv->ssl, out, n);
#endif
#ifdef HAVE_GNUTLS
- rc = gnutls_record_send(tls_session, CS outbuffer, n + 2);
- if (rc < 0)
+ if ((rc = gnutls_record_send(tls_session, CS out, n)) < 0)
{
printf("GnuTLS write error: %s\n", gnutls_strerror(rc));
exit(76);
#endif
}
else
- {
- rc = write(sock, outbuffer, n + 2);
- }
+ rc = write(srv->sock, out, n);
alarm(0);
if (rc < 0)
}
}
}
+}
+
+
+
+
+/*************************************************
+* Main Program *
+*************************************************/
+
+const char * const HELP_MESSAGE = "\n\
+Usage: client\n"
+#ifdef HAVE_TLS
+"\
+ [-tls-on-connect]\n\
+ [-ocsp]\n"
+# ifdef HAVE_GNUTLS
+"\
+ [-p priority-string]\n"
+# endif
+#endif
+"\
+ [-tn] n seconds timeout\n\
+ <IP address>\n\
+ <port>\n\
+ [<outgoing interface>]\n\
+ [<cert file>]\n\
+ [<key file>]\n\
+\n";
+
+int
+main(int argc, char **argv)
+{
+struct sockaddr *s_ptr;
+struct sockaddr_in s_in4;
+char *interface = NULL;
+char *address = NULL;
+char *certfile = NULL;
+char *keyfile = NULL;
+char *end = NULL;
+int argi = 1;
+int host_af, port, s_len, rc, save_errno;
+int timeout = 5;
+int tls_on_connect = 0;
+long tmplong;
+
+#if HAVE_IPV6
+struct sockaddr_in6 s_in6;
+#endif
+
+srv_ctx srv;
+
+unsigned char inbuffer[100 * 1024];
+unsigned char *inptr = inbuffer;
+
+*inptr = 0; /* Buffer empty */
+srv.tls_active = 0;
+srv.sent_starttls = 0;
+
+/* Options */
+
+while (argc >= argi + 1 && argv[argi][0] == '-')
+ {
+ if (strcmp(argv[argi], "-help") == 0 ||
+ strcmp(argv[argi], "--help") == 0 ||
+ strcmp(argv[argi], "-h") == 0)
+ {
+ puts(HELP_MESSAGE);
+ exit(0);
+ }
+ if (strcmp(argv[argi], "-tls-on-connect") == 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++];
+ }
+# ifdef HAVE_GNUTLS
+ else if (strcmp(argv[argi], "-p") == 0)
+ {
+ if (argc < ++argi + 1)
+ {
+ fprintf(stderr, "Missing priority string\n");
+ exit(96);
+ }
+ pri_string = argv[argi++];
+ }
+#endif
+
+#endif
+ else if (argv[argi][1] == 't' && isdigit(argv[argi][2]))
+ {
+ tmplong = strtol(argv[argi]+2, &end, 10);
+ if (end == argv[argi]+2 || *end)
+ {
+ fprintf(stderr, "Failed to parse seconds from option <%s>\n",
+ argv[argi]);
+ exit(95);
+ }
+ if (tmplong > 10000L)
+ {
+ fprintf(stderr, "Unreasonably long wait of %ld seconds requested\n",
+ tmplong);
+ exit(94);
+ }
+ if (tmplong < 0L)
+ {
+ fprintf(stderr, "Timeout must not be negative (%ld)\n", tmplong);
+ exit(93);
+ }
+ timeout = (int) tmplong;
+ argi++;
+ }
+ else
+ {
+ fprintf(stderr, "Unrecognized option %s\n", argv[argi]);
+ exit(92);
+ }
+ }
+
+/* Mandatory 1st arg is IP address */
+
+if (argc < argi+1)
+ {
+ fprintf(stderr, "No IP address given\n");
+ exit(91);
+ }
+
+address = argv[argi++];
+host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET;
+
+/* Mandatory 2nd arg is port */
+
+if (argc < argi+1)
+ {
+ fprintf(stderr, "No port number given\n");
+ exit(90);
+ }
+
+port = atoi(argv[argi++]);
+
+/* Optional next arg is interface */
+
+if (argc > argi &&
+ (isdigit((unsigned char)argv[argi][0]) || argv[argi][0] == ':'))
+ interface = argv[argi++];
+
+/* Any more arguments are the name of a certificate file and key file */
+
+if (argc > argi) certfile = argv[argi++];
+if (argc > argi) keyfile = argv[argi++];
+
+
+#if HAVE_IPV6
+/* For an IPv6 address, use an IPv6 sockaddr structure. */
+
+if (host_af == AF_INET6)
+ {
+ s_ptr = (struct sockaddr *)&s_in6;
+ s_len = sizeof(s_in6);
+ }
+else
+#endif
+
+/* For an IPv4 address, use an IPv4 sockaddr structure,
+even on an IPv6 system. */
+
+ {
+ s_ptr = (struct sockaddr *)&s_in4;
+ s_len = sizeof(s_in4);
+ }
+
+printf("Connecting to %s port %d ... ", address, port);
+
+srv.sock = socket(host_af, SOCK_STREAM, 0);
+if (srv.sock < 0)
+ {
+ printf("socket creation failed: %s\n", strerror(errno));
+ exit(89);
+ }
+
+/* Bind to a specific interface if requested. On an IPv6 system, this has
+to be of the same family as the address we are calling. On an IPv4 system the
+test is redundant, but it keeps the code tidier. */
+
+if (interface != NULL)
+ {
+ int interface_af = (strchr(interface, ':') != NULL)? AF_INET6 : AF_INET;
+
+ if (interface_af == host_af)
+ {
+ #if HAVE_IPV6
+
+ /* Set up for IPv6 binding */
+
+ if (host_af == AF_INET6)
+ {
+ memset(&s_in6, 0, sizeof(s_in6));
+ s_in6.sin6_family = AF_INET6;
+ s_in6.sin6_port = 0;
+ if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1)
+ {
+ printf("Unable to parse \"%s\"", interface);
+ exit(88);
+ }
+ }
+ else
+ #endif
+
+ /* Set up for IPv4 binding */
+
+ {
+ memset(&s_in4, 0, sizeof(s_in4));
+ s_in4.sin_family = AF_INET;
+ s_in4.sin_port = 0;
+ s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(interface);
+ }
+
+ /* Bind */
+
+ if (bind(srv.sock, s_ptr, s_len) < 0)
+ {
+ printf("Unable to bind outgoing SMTP call to %s: %s",
+ interface, strerror(errno));
+ exit(87);
+ }
+ }
+ }
+
+/* Set up a remote IPv6 address */
+
+#if HAVE_IPV6
+if (host_af == AF_INET6)
+ {
+# ifdef HAVE_GETADDRINFO
+ struct addrinfo hints, *res;
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = AF_INET6;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = AI_NUMERICHOST;
+ if ((rc = getaddrinfo(address, NULL, &hints, &res)) != 0 || res == NULL)
+ {
+ printf("unable to parse \"%s\" as an IP address: %s\n", address,
+ rc == 0 ? "NULL result returned" : gai_strerror(rc));
+ exit(86);
+ }
+ memcpy(&s_in6, res->ai_addr, res->ai_addrlen);
+ freeaddrinfo(res);
+# else
+ memset(&s_in6, 0, sizeof(s_in6));
+ s_in6.sin6_family = AF_INET6;
+ if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1)
+ {
+ printf("Unable to parse \"%s\"", address);
+ exit(86);
+ }
+# endif
+ s_in6.sin6_port = htons(port);
+ }
+else
+#endif
+
+/* Set up a remote IPv4 address */
+
+ {
+ memset(&s_in4, 0, sizeof(s_in4));
+ s_in4.sin_family = AF_INET;
+ s_in4.sin_port = htons(port);
+ s_in4.sin_addr.s_addr = (S_ADDR_TYPE)inet_addr(address);
+ }
+
+/* SIGALRM handler crashes out */
+
+signal(SIGALRM, sigalrm_handler_crash);
+alarm(timeout);
+rc = connect(srv.sock, s_ptr, s_len);
+save_errno = errno;
+alarm(0);
+
+/* A failure whose error code is "Interrupted system call" is in fact
+an externally applied timeout if the signal handler has been run. */
+
+if (rc < 0)
+ {
+ close(srv.sock);
+ printf("connect failed: %s\n", strerror(save_errno));
+ exit(85);
+ }
+
+#ifdef TCP_QUICKACK
+ {
+ int off = 0;
+ (void) setsockopt(srv.sock, IPPROTO_TCP, TCP_QUICKACK, US &off, sizeof(off));
+ }
+#endif
+
+printf("connected\n");
+
+
+/* --------------- Set up for OpenSSL --------------- */
+
+#ifdef HAVE_OPENSSL
+SSL_library_init();
+SSL_load_error_strings();
+
+if (!(srv.ctx = SSL_CTX_new(SSLv23_method())))
+ {
+ printf ("SSL_CTX_new failed\n");
+ exit(84);
+ }
+
+if (certfile)
+ {
+ if (!SSL_CTX_use_certificate_file(srv.ctx, certfile, SSL_FILETYPE_PEM))
+ {
+ printf("SSL_CTX_use_certificate_file failed\n");
+ exit(83);
+ }
+ printf("Certificate file = %s\n", certfile);
+ }
+
+if (keyfile)
+ {
+ if (!SSL_CTX_use_PrivateKey_file(srv.ctx, keyfile, SSL_FILETYPE_PEM))
+ {
+ printf("SSL_CTX_use_PrivateKey_file failed\n");
+ exit(82);
+ }
+ printf("Key file = %s\n", keyfile);
+ }
+
+SSL_CTX_set_session_cache_mode(srv.ctx, SSL_SESS_CACHE_BOTH);
+SSL_CTX_set_timeout(srv.ctx, 200);
+SSL_CTX_set_info_callback(srv.ctx, (void (*)())info_callback);
+#endif
+
+
+/* --------------- Set up for GnuTLS --------------- */
+
+#ifdef HAVE_GNUTLS
+if (certfile != NULL) printf("Certificate file = %s\n", certfile);
+if (keyfile != NULL) printf("Key file = %s\n", keyfile);
+tls_init(US certfile, US 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_t)(intptr_t)srv.sock);
+
+/* When the server asks for a certificate and the client does not have one,
+there is a SIGPIPE error in the gnutls_handshake() function for some reason
+that is not understood. As luck would have it, this has never hit Exim itself
+because it ignores SIGPIPE errors. Doing the same here allows it all to work as
+one wants. */
+
+signal(SIGPIPE, SIG_IGN);
+#endif
+
+/* ---------------------------------------------- */
+
+
+/* Start TLS session if configured to do so without STARTTLS */
+
+#ifdef HAVE_TLS
+if (tls_on_connect)
+ {
+ printf("Attempting to start TLS\n");
+
+#ifdef HAVE_OPENSSL
+ srv.tls_active = tls_start(srv.sock, &srv.ssl, srv.ctx);
+#endif
+
+#ifdef HAVE_GNUTLS
+ {
+ int rc;
+ sigalrm_seen = FALSE;
+ alarm(timeout);
+ do {
+ rc = gnutls_handshake(tls_session);
+ } while (rc < 0 && gnutls_error_is_fatal(rc) == 0);
+ srv.tls_active = rc >= 0;
+ alarm(0);
+
+ if (!srv.tls_active) printf("%s\n", gnutls_strerror(rc));
+ }
+#endif
+
+ if (!srv.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
+
+do_file(&srv, stdin, timeout, inbuffer, sizeof(inbuffer), inptr);
printf("End of script\n");
-shutdown(sock, SHUT_WR);
-while ((rc = read(sock, inbuffer, sizeof(inbuffer))) > 0) ;
-close(sock);
+shutdown(srv.sock, SHUT_WR);
+if (fcntl(srv.sock, F_SETFL, O_NONBLOCK) == 0)
+ while (read(srv.sock, inbuffer, sizeof(inbuffer)) > 0) ;
+close(srv.sock);
exit(0);
}
git://git.exim.org / exim.git / blobdiff