Tidying

[exim.git] / test / src / client.c

diff --git a/test/src/client.c b/test/src/client.c
index 3b782f3fdecf3f8823c53dea6b599274d42389c5..cd2194af126f707f675aeb28283c8c4e040458f1 100644 (file)
--- a/test/src/client.c
+++ b/test/src/client.c
@@ -1,8 +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
 /* 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, then code for OCSP stapling was ripped
-from the openssl ocsp and s_client utilities. */
+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 */
 
 
 /* ANSI C standard includes */
 


@@ -58,27 +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. */
 
 /* TLS support can be optionally included, either for OpenSSL or GnuTLS. The
 latter needs a whole pile of tables. */

-

 #ifdef HAVE_OPENSSL
 #ifdef HAVE_OPENSSL

-#define HAVE_TLS
-#include <openssl/crypto.h>
-#include <openssl/x509.h>
-#include <openssl/pem.h>
-#include <openssl/ssl.h>
-#include <openssl/err.h>
-#include <openssl/rand.h>
-#include <openssl/ocsp.h>
-
-char * ocsp_stapling = NULL;
+# define HAVE_TLS
+# include <openssl/crypto.h>
+# include <openssl/x509.h>
+# include <openssl/pem.h>
+# include <openssl/ssl.h>
+# include <openssl/err.h>
+# include <openssl/rand.h>
+
+# 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 <openssl/ocsp.h>
+# endif

 #endif
 
 
 #ifdef HAVE_GNUTLS
 #endif
 
 
 #ifdef HAVE_GNUTLS

-#define HAVE_TLS
-#include <gnutls/gnutls.h>
-#include <gnutls/x509.h>
+# define HAVE_TLS
+# include <gnutls/gnutls.h>
+# include <gnutls/x509.h>
+# if GNUTLS_VERSION_NUMBER >= 0x030103
+#  define HAVE_OCSP
+#  include <gnutls/ocsp.h>
+# endif

 
 

-#define DH_BITS      768
+# define DH_BITS      768

 
 /* Local static variables for GNUTLS */
 
 
 /* Local static variables for GNUTLS */
 


@@ -114,9 +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 };
 
 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

 
 
 /*************************************************
 
 
 /*************************************************


@@ -182,6 +194,7 @@ setup_verify(BIO *bp, char *CAfile, char *CApath)
 }
 
 
 }
 
 

+#ifndef DISABLE_OCSP

 static int
 tls_client_stapling_cb(SSL *s, void *arg)
 {
 static int
 tls_client_stapling_cb(SSL *s, void *arg)
 {


@@ -232,30 +245,34 @@ else
 X509_STORE_free(store);
 return ret;
 }
 X509_STORE_free(store);
 return ret;
 }

+#endif

 
 
 /*************************************************
 *         Start an OpenSSL TLS session           *
 *************************************************/
 
 
 
 /*************************************************
 *         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;
 {
 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);
 
 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);
 
 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);
   }
 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;
 
 signal(SIGALRM, sigalrm_handler_flag);
 sigalrm_seen = 0;


@@ -319,7 +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");
 fprintf(stderr, "GnuTLS connection error: %s:", prefix);
 if (err != 0) fprintf(stderr, " %s", gnutls_strerror(err));
 fprintf(stderr, "\n");

-exit(1);
+exit(98);

 }
 
 
 }
 
 


@@ -352,7 +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));
 if (fd < 0)
   {
   fprintf(stderr, "Failed to open spool/gnutls-params: %s\n", strerror(errno));

-  exit(1);
+  exit(97);

   }
 
 if (fstat(fd, &statbuf) < 0)
   }
 
 if (fstat(fd, &statbuf) < 0)


@@ -416,6 +433,11 @@ if (certificate != NULL)
 /* Associate the parameters with the x509 credentials structure. */
 
 gnutls_certificate_set_dh_params(x509_cred, dh_params);
 /* 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);

 }
 
 
 }
 
 


@@ -477,7 +499,7 @@ char *keyfile = NULL;
 char *end = NULL;
 int argi = 1;
 int host_af, port, s_len, rc, sock, save_errno;
 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;
 int tls_active = 0;
 int sent_starttls = 0;
 int tls_on_connect = 0;


@@ -506,7 +528,7 @@ while (argc >= argi + 1 && argv[argi][0] == '-')
       strcmp(argv[argi], "--help") == 0 ||
       strcmp(argv[argi], "-h") == 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)
     exit(0);
     }
   if (strcmp(argv[argi], "-tls-on-connect") == 0)


@@ -514,16 +536,17 @@ while (argc >= argi + 1 && argv[argi][0] == '-')
     tls_on_connect = 1;
     argi++;
     }
     tls_on_connect = 1;
     argi++;
     }

-#ifdef HAVE_OPENSSL
+#ifdef HAVE_TLS

   else if (strcmp(argv[argi], "-ocsp") == 0)
     {
     if (argc < ++argi + 1)
       {
       fprintf(stderr, "Missing required certificate file for ocsp option\n");
   else if (strcmp(argv[argi], "-ocsp") == 0)
     {
     if (argc < ++argi + 1)
       {
       fprintf(stderr, "Missing required certificate file for ocsp option\n");

-      exit(1);
+      exit(96);

       }
     ocsp_stapling = argv[argi++];
     }
       }
     ocsp_stapling = argv[argi++];
     }

+

 #endif
   else if (argv[argi][1] == 't' && isdigit(argv[argi][2]))
     {
 #endif
   else if (argv[argi][1] == 't' && isdigit(argv[argi][2]))
     {


@@ -532,18 +555,18 @@ while (argc >= argi + 1 && argv[argi][0] == '-')
       {
       fprintf(stderr, "Failed to parse seconds from option <%s>\n",
         argv[argi]);
       {
       fprintf(stderr, "Failed to parse seconds from option <%s>\n",
         argv[argi]);

-      exit(1);
+      exit(95);

       }
     if (tmplong > 10000L)
       {
       }
     if (tmplong > 10000L)
       {

-      fprintf(stderr, "Unreasonably long wait of %d seconds requested\n",
+      fprintf(stderr, "Unreasonably long wait of %ld seconds requested\n",

         tmplong);
         tmplong);

-      exit(1);
+      exit(94);

       }
     if (tmplong < 0L)
       {
       }
     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++;
       }
     timeout = (int) tmplong;
     argi++;


@@ -551,7 +574,7 @@ while (argc >= argi + 1 && argv[argi][0] == '-')
   else
     {
     fprintf(stderr, "Unrecognized option %s\n", argv[argi]);
   else
     {
     fprintf(stderr, "Unrecognized option %s\n", argv[argi]);

-    exit(1);
+    exit(92);

     }
   }
 
     }
   }
 


@@ -560,7 +583,7 @@ while (argc >= argi + 1 && argv[argi][0] == '-')
 if (argc < argi+1)
   {
   fprintf(stderr, "No IP address given\n");
 if (argc < argi+1)
   {
   fprintf(stderr, "No IP address given\n");

-  exit(1);
+  exit(91);

   }
 
 address = argv[argi++];
   }
 
 address = argv[argi++];


@@ -571,7 +594,7 @@ host_af = (strchr(address, ':') != NULL)? AF_INET6 : AF_INET;
 if (argc < argi+1)
   {
   fprintf(stderr, "No port number given\n");
 if (argc < argi+1)
   {
   fprintf(stderr, "No port number given\n");

-  exit(1);
+  exit(90);

   }
 
 port = atoi(argv[argi++]);
   }
 
 port = atoi(argv[argi++]);


@@ -613,7 +636,7 @@ sock = socket(host_af, SOCK_STREAM, 0);
 if (sock < 0)
   {
   printf("socket creation failed: %s\n", strerror(errno));
 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
   }
 
 /* Bind to a specific interface if requested. On an IPv6 system, this has


@@ -638,7 +661,7 @@ if (interface != NULL)
       if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1)
         {
         printf("Unable to parse \"%s\"", interface);
       if (inet_pton(AF_INET6, interface, &s_in6.sin6_addr) != 1)
         {
         printf("Unable to parse \"%s\"", interface);

-        exit(1);
+        exit(88);

         }
       }
     else
         }
       }
     else


@@ -659,7 +682,7 @@ if (interface != NULL)
       {
       printf("Unable to bind outgoing SMTP call to %s: %s",
         interface, strerror(errno));
       {
       printf("Unable to bind outgoing SMTP call to %s: %s",
         interface, strerror(errno));

-      exit(1);
+      exit(87);

       }
     }
   }
       }
     }
   }


@@ -675,7 +698,7 @@ if (host_af == AF_INET6)
   if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1)
     {
     printf("Unable to parse \"%s\"", address);
   if (inet_pton(host_af, address, &s_in6.sin6_addr) != 1)
     {
     printf("Unable to parse \"%s\"", address);

-    exit(1);
+    exit(86);

     }
   }
 else
     }
   }
 else


@@ -704,8 +727,8 @@ an externally applied timeout if the signal handler has been run. */
 if (rc < 0)
   {
   close(sock);
 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");
   }
 
 printf("connected\n");


@@ -721,7 +744,7 @@ ctx = SSL_CTX_new(SSLv23_method());
 if (ctx == NULL)
   {
   printf ("SSL_CTX_new failed\n");
 if (ctx == NULL)
   {
   printf ("SSL_CTX_new failed\n");

-  exit(1);
+  exit(84);

   }
 
 if (certfile != NULL)
   }
 
 if (certfile != NULL)


@@ -729,7 +752,7 @@ if (certfile != NULL)
   if (!SSL_CTX_use_certificate_file(ctx, certfile, SSL_FILETYPE_PEM))
     {
     printf("SSL_CTX_use_certificate_file failed\n");
   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);
   }
     }
   printf("Certificate file = %s\n", certfile);
   }


@@ -739,7 +762,7 @@ if (keyfile != NULL)
   if (!SSL_CTX_use_PrivateKey_file(ctx, keyfile, SSL_FILETYPE_PEM))
     {
     printf("SSL_CTX_use_PrivateKey_file failed\n");
   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);
   }
     }
   printf("Key file = %s\n", keyfile);
   }


@@ -757,6 +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();
 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,
 gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr)sock);
 
 /* When the server asks for a certificate and the client does not have one,


@@ -791,20 +818,25 @@ if (tls_on_connect)
 
   if (!tls_active)
     printf("Failed to start TLS\n");
 
   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
 
   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 */
 
   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);
     {
     unsigned char *lineptr;
     printf("%s\n", outbuffer);


@@ -830,13 +862,13 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL)
       if (rc < 0)
         {
         printf("Read error %s\n", strerror(errno));
       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);
         }
       else if (rc == 0)
         {
         printf("Unexpected EOF read\n");
         close(sock);

-        exit(1);
+        exit(80);

         }
       else
         {
         }
       else
         {


@@ -854,10 +886,10 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL)
       }
 
     printf("<<< %s\n", lineptr);
       }
 
     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");
       {
       printf("\n******** Input mismatch ********\n");

-      exit(1);
+      exit(79);

       }
 
     #ifdef HAVE_TLS
       }
 
     #ifdef HAVE_TLS


@@ -865,6 +897,9 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL)
       {
       if (lineptr[0] == '2')
         {
       {
       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);
 


@@ -884,6 +919,44 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL)
           printf("Failed to start TLS\n");
           fflush(stdout);
           }
           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");
         }
         else
           printf("Succeeded in starting TLS\n");
         }


@@ -895,10 +968,10 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL)
 
   /* Wait for a bit before proceeding */
 
 
   /* Wait for a bit before proceeding */
 

-  else if (strncmp(outbuffer, "+++ ", 4) == 0)
+  else if (strncmp(CS outbuffer, "+++ ", 4) == 0)

     {
     printf("%s\n", outbuffer);
     {
     printf("%s\n", outbuffer);

-    sleep(atoi(outbuffer + 4));
+    sleep(atoi(CS outbuffer + 4));

     }
 
   /* Send outgoing, but barf if unconsumed incoming */
     }
 
   /* Send outgoing, but barf if unconsumed incoming */


@@ -911,20 +984,20 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL)
       {
       printf("Unconsumed input: %s", inptr);
       printf("   About to send: %s\n", outbuffer);
       {
       printf("Unconsumed input: %s", inptr);
       printf("   About to send: %s\n", outbuffer);

-      exit(1);
+      exit(78);

       }
 
     #ifdef HAVE_TLS
 
     /* Shutdown TLS */
 
       }
 
     #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");
       {
       if (!tls_active)
         {
         printf("STOPTLS read when TLS not active\n");

-        exit(1);
+        exit(77);

         }
       printf("Shutting down TLS encryption\n");
 
         }
       printf("Shutting down TLS encryption\n");
 


@@ -946,14 +1019,14 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL)
 
     /* Remember that we sent STARTTLS */
 
 
     /* 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. */
 
 
     /* 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;
       {
       outbuffer[8] = 0;
       n = 8;


@@ -961,18 +1034,18 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL)
     #endif
 
     printf(">>> %s\n", outbuffer);
     #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. */
 
 
     /* 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--;
       }
 
       {
       *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);
       {
       *escape = '\n';
       memmove(escape + 1, escape + 2,  (n + 2) - (escape - outbuffer) - 2);


@@ -992,7 +1065,7 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL)
         if (rc < 0)
           {
           printf("GnuTLS write error: %s\n", gnutls_strerror(rc));
         if (rc < 0)
           {
           printf("GnuTLS write error: %s\n", gnutls_strerror(rc));

-          exit(1);
+          exit(76);

           }
       #endif
       }
           }
       #endif
       }


@@ -1005,7 +1078,7 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL)
     if (rc < 0)
       {
       printf("Write error: %s\n", strerror(errno));
     if (rc < 0)
       {
       printf("Write error: %s\n", strerror(errno));

-      exit(1);
+      exit(75);

       }
     }
   }
       }
     }
   }