Free generated supp data after handshake completion, add comment regarding use of...
[openssl.git] / apps / s_client.c
index b4ea03b..6a4b2da 100644 (file)
@@ -225,8 +225,10 @@ static int c_brief=0;
 
 #ifndef OPENSSL_NO_TLSEXT
 
-static const unsigned char *most_recent_supplemental_data;
-static size_t most_recent_supplemental_data_length;
+static unsigned char *generated_supp_data = NULL;
+
+static unsigned char *most_recent_supplemental_data = NULL;
+static size_t most_recent_supplemental_data_length = 0;
 
 static int server_provided_server_authz = 0;
 static int server_provided_client_authz = 0;
@@ -1779,6 +1781,13 @@ SSL_set_tlsext_status_ids(con, ids);
                                                "CONNECTION ESTABLISHED\n");
                                        print_ssl_summary(bio_err, con);
                                        }
+                               /*handshake is complete - free the generated supp data allocated in the callback */
+                               if (generated_supp_data)
+                                       {
+                                       OPENSSL_free(generated_supp_data);
+                                       generated_supp_data = NULL;
+                                       }
+
                                print_stuff(bio_c_out,con,full_log);
                                if (full_log > 0) full_log--;
 
@@ -2450,6 +2459,8 @@ static int authz_tlsext_generate_cb(SSL *s, unsigned short ext_type,
        {
        if (c_auth)
                {
+               /*if auth_require_reneg flag is set, only send extensions if
+                 renegotiation has occurred */
                if (!c_auth_require_reneg || (c_auth_require_reneg && SSL_num_renegotiations(s)))
                        {
                        *out = auth_ext_data;
@@ -2478,15 +2489,16 @@ static int auth_suppdata_generate_cb(SSL *s, unsigned short supp_data_type,
                                     const unsigned char **out,
                                     unsigned short *outlen, void *arg)
        {
-       unsigned char *result;
        if (c_auth && server_provided_client_authz && server_provided_server_authz)
                {
+               /*if auth_require_reneg flag is set, only send supplemental data if
+                 renegotiation has occurred */
                if (!c_auth_require_reneg
                    || (c_auth_require_reneg && SSL_num_renegotiations(s)))
                        {
-                       result = OPENSSL_malloc(10);
-                       memcpy(result, "5432154321", 10);
-                       *out = result;
+                       generated_supp_data = OPENSSL_malloc(10);
+                       memcpy(generated_supp_data, "5432154321", 10);
+                       *out = generated_supp_data;
                        *outlen = 10;
                        return 1;
                        }