Documentation/Tests for CVE-2014-2972 fix

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

diff --git a/test/src/client.c b/test/src/client.c
index 3b782f3fdecf3f8823c53dea6b599274d42389c5..e7210f22398ac15252efbde89b3d85078f0a6eec 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
-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 */
 
@@ -60,25 +60,27 @@ static int sigalrm_seen = 0;
 latter needs a whole pile of tables. */
 
 #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>
+# include <openssl/ocsp.h>
 #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 */
 
@@ -114,10 +116,14 @@ 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
+
 
 /*************************************************
 *            SIGALRM handler - crash out         *
@@ -238,7 +244,8 @@ return ret;
 *         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";
@@ -416,6 +423,11 @@ 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);
 }
 
 
@@ -514,7 +526,7 @@ while (argc >= argi + 1 && argv[argi][0] == '-')
     tls_on_connect = 1;
     argi++;
     }
-#ifdef HAVE_OPENSSL
+#ifdef HAVE_TLS
   else if (strcmp(argv[argi], "-ocsp") == 0)
     {
     if (argc < ++argi + 1)
@@ -524,6 +536,7 @@ while (argc >= argi + 1 && argv[argi][0] == '-')
       }
     ocsp_stapling = argv[argi++];
     }
+
 #endif
   else if (argv[argi][1] == 't' && isdigit(argv[argi][2]))
     {
@@ -757,6 +770,10 @@ 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,
@@ -791,6 +808,11 @@ 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");
   }
@@ -865,6 +887,9 @@ while (fgets(outbuffer, sizeof(outbuffer), stdin) != NULL)
       {
       if (lineptr[0] == '2')
         {
+int rc;
+       unsigned int verify;
+
         printf("Attempting to start TLS\n");
         fflush(stdout);
 
@@ -884,6 +909,44 @@ 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");
         }