commit 699cafaea27c72ea68aa85bd8a4e18afb879e272
author Manuel Pégourié-Gonnard <mpg@elzevir.fr> Mon Oct 27 13:57:03 2014 +0100
committer Manuel Pégourié-Gonnard <mpg@elzevir.fr> Wed Nov 05 16:00:50 2014 +0100
tree ae1f68b549b18c1b597e7a3911d923cd3ffa440e
parent b3c6a97b31eebbd8867f1ee99e54d34fb9028d85

Implement initial negotiation of EtM

Not implemented yet:
- actually using EtM
- conditions on renegotiation

programs/ssl/ssl_server2.c

diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index 35a156b..08f2ff8 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -117,6 +117,7 @@
 #define DFL_ALPN_STRING         NULL
 #define DFL_DHM_FILE            NULL
 #define DFL_EXTENDED_MS         -1
+#define DFL_ETM                 -1
 
 #define LONG_RESPONSE "<p>01-blah-blah-blah-blah-blah-blah-blah-blah-blah\r\n" \
     "02-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah\r\n"  \
@@ -178,6 +179,7 @@
     const char *alpn_string;    /* ALPN supported protocols                 */
     const char *dhm_file;       /* the file with the DH parameters          */
     char extended_ms;           /* allow negotiation of extended MS?        */
+    char etm;                   /* allow negotiation of encrypt-then-MAC?   */
 } opt;
 
 static void my_debug( void *ctx, int level, const char *str )
@@ -308,6 +310,13 @@
 #define USAGE_EMS ""
 #endif
 
+#if defined(POLARSSL_SSL_ENCRYPT_THEN_MAC)
+#define USAGE_ETM \
+    "    etm=0/1             default: (library default: on)\n"
+#else
+#define USAGE_ETM ""
+#endif
+
 #define USAGE \
     "\n usage: ssl_server2 param=<>...\n"                   \
     "\n acceptable parameters:\n"                           \
@@ -334,6 +343,7 @@
     USAGE_MAX_FRAG_LEN                                      \
     USAGE_ALPN                                              \
     USAGE_EMS                                               \
+    USAGE_ETM                                               \
     "\n"                                                    \
     "    min_version=%%s      default: \"ssl3\"\n"          \
     "    max_version=%%s      default: \"tls1_2\"\n"        \
@@ -724,6 +734,7 @@
     opt.alpn_string         = DFL_ALPN_STRING;
     opt.dhm_file            = DFL_DHM_FILE;
     opt.extended_ms         = DFL_EXTENDED_MS;
+    opt.etm                 = DFL_ETM;
 
     for( i = 1; i < argc; i++ )
     {
@@ -900,6 +911,15 @@
                 default: goto usage;
             }
         }
+        else if( strcmp( p, "etm" ) == 0 )
+        {
+            switch( atoi( q ) )
+            {
+                case 0: opt.etm = SSL_ETM_DISABLED; break;
+                case 1: opt.etm = SSL_ETM_ENABLED; break;
+                default: goto usage;
+            }
+        }
         else if( strcmp( p, "tickets" ) == 0 )
         {
             opt.tickets = atoi( q );
@@ -1282,6 +1302,11 @@
         ssl_set_extended_master_secret( &ssl, opt.extended_ms );
 #endif
 
+#if defined(POLARSSL_SSL_ENCRYPT_THEN_MAC)
+    if( opt.etm != DFL_ETM )
+        ssl_set_encrypt_then_mac( &ssl, opt.etm );
+#endif
+
 #if defined(POLARSSL_SSL_ALPN)
     if( opt.alpn_string != NULL )
         if( ( ret = ssl_set_alpn_protocols( &ssl, alpn_list ) ) != 0 )