Add support for application defined signature algorithms for use with
[openssl.git] / ssl / d1_lib.c
index 62b7702..f61f718 100644 (file)
  */
 
 #include <stdio.h>
+#define USE_SOCKETS
 #include <openssl/objects.h>
 #include "ssl_locl.h"
 
-#ifdef OPENSSL_SYS_WIN32
+#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS)
 #include <sys/timeb.h>
 #endif
 
 static void get_current_time(struct timeval *t);
 const char dtls1_version_str[]="DTLSv1" OPENSSL_VERSION_PTEXT;
+int dtls1_listen(SSL *s, struct sockaddr *client);
 
 SSL3_ENC_METHOD DTLSv1_enc_data={
     dtls1_enc,
@@ -80,6 +82,7 @@ SSL3_ENC_METHOD DTLSv1_enc_data={
        TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE,
        TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE,
        tls1_alert_code,
+       tls1_export_keying_material,
        };
 
 long dtls1_default_timeout(void)
@@ -127,26 +130,33 @@ int dtls1_new(SSL *s)
        return(1);
        }
 
-void dtls1_free(SSL *s)
+static void dtls1_clear_queues(SSL *s)
        {
     pitem *item = NULL;
     hm_fragment *frag = NULL;
-
-       ssl3_free(s);
+       DTLS1_RECORD_DATA *rdata;
 
     while( (item = pqueue_pop(s->d1->unprocessed_rcds.q)) != NULL)
         {
+               rdata = (DTLS1_RECORD_DATA *) item->data;
+               if (rdata->rbuf.buf)
+                       {
+                       OPENSSL_free(rdata->rbuf.buf);
+                       }
         OPENSSL_free(item->data);
         pitem_free(item);
         }
-    pqueue_free(s->d1->unprocessed_rcds.q);
 
     while( (item = pqueue_pop(s->d1->processed_rcds.q)) != NULL)
         {
+               rdata = (DTLS1_RECORD_DATA *) item->data;
+               if (rdata->rbuf.buf)
+                       {
+                       OPENSSL_free(rdata->rbuf.buf);
+                       }
         OPENSSL_free(item->data);
         pitem_free(item);
         }
-    pqueue_free(s->d1->processed_rcds.q);
 
     while( (item = pqueue_pop(s->d1->buffered_messages)) != NULL)
         {
@@ -155,7 +165,6 @@ void dtls1_free(SSL *s)
         OPENSSL_free(frag);
         pitem_free(item);
         }
-    pqueue_free(s->d1->buffered_messages);
 
     while ( (item = pqueue_pop(s->d1->sent_messages)) != NULL)
         {
@@ -164,7 +173,6 @@ void dtls1_free(SSL *s)
         OPENSSL_free(frag);
         pitem_free(item);
         }
-       pqueue_free(s->d1->sent_messages);
 
        while ( (item = pqueue_pop(s->d1->buffered_app_data.q)) != NULL)
                {
@@ -173,6 +181,18 @@ void dtls1_free(SSL *s)
                OPENSSL_free(frag);
                pitem_free(item);
                }
+       }
+
+void dtls1_free(SSL *s)
+       {
+       ssl3_free(s);
+
+       dtls1_clear_queues(s);
+
+    pqueue_free(s->d1->unprocessed_rcds.q);
+    pqueue_free(s->d1->processed_rcds.q);
+    pqueue_free(s->d1->buffered_messages);
+       pqueue_free(s->d1->sent_messages);
        pqueue_free(s->d1->buffered_app_data.q);
 
        OPENSSL_free(s->d1);
@@ -180,6 +200,43 @@ void dtls1_free(SSL *s)
 
 void dtls1_clear(SSL *s)
        {
+    pqueue unprocessed_rcds;
+    pqueue processed_rcds;
+    pqueue buffered_messages;
+       pqueue sent_messages;
+       pqueue buffered_app_data;
+       unsigned int mtu;
+
+       if (s->d1)
+               {
+               unprocessed_rcds = s->d1->unprocessed_rcds.q;
+               processed_rcds = s->d1->processed_rcds.q;
+               buffered_messages = s->d1->buffered_messages;
+               sent_messages = s->d1->sent_messages;
+               buffered_app_data = s->d1->buffered_app_data.q;
+               mtu = s->d1->mtu;
+
+               dtls1_clear_queues(s);
+
+               memset(s->d1, 0, sizeof(*(s->d1)));
+
+               if (s->server)
+                       {
+                       s->d1->cookie_len = sizeof(s->d1->cookie);
+                       }
+
+               if (SSL_get_options(s) & SSL_OP_NO_QUERY_MTU)
+                       {
+                       s->d1->mtu = mtu;
+                       }
+
+               s->d1->unprocessed_rcds.q = unprocessed_rcds;
+               s->d1->processed_rcds.q = processed_rcds;
+               s->d1->buffered_messages = buffered_messages;
+               s->d1->sent_messages = sent_messages;
+               s->d1->buffered_app_data.q = buffered_app_data;
+               }
+
        ssl3_clear(s);
        if (s->options & SSL_OP_CISCO_ANYCONNECT)
                s->version=DTLS1_BAD_VER;
@@ -187,6 +244,32 @@ void dtls1_clear(SSL *s)
                s->version=DTLS1_VERSION;
        }
 
+long dtls1_ctrl(SSL *s, int cmd, long larg, void *parg)
+       {
+       int ret=0;
+
+       switch (cmd)
+               {
+       case DTLS_CTRL_GET_TIMEOUT:
+               if (dtls1_get_timeout(s, (struct timeval*) parg) != NULL)
+                       {
+                       ret = 1;
+                       }
+               break;
+       case DTLS_CTRL_HANDLE_TIMEOUT:
+               ret = dtls1_handle_timeout(s);
+               break;
+       case DTLS_CTRL_LISTEN:
+               ret = dtls1_listen(s, parg);
+               break;
+
+       default:
+               ret = ssl3_ctrl(s, cmd, larg, parg);
+               break;
+               }
+       return(ret);
+       }
+
 /*
  * As it's impossible to use stream ciphers in "datagram" mode, this
  * simple filter is designed to disengage them in DTLS. Unfortunately
@@ -209,6 +292,15 @@ const SSL_CIPHER *dtls1_get_cipher(unsigned int u)
 
 void dtls1_start_timer(SSL *s)
        {
+#ifndef OPENSSL_NO_SCTP
+       /* Disable timer for SCTP */
+       if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
+               {
+               memset(&(s->d1->next_timeout), 0, sizeof(struct timeval));
+               return;
+               }
+#endif
+
        /* If timer is not set, initialize duration with 1 second */
        if (s->d1->next_timeout.tv_sec == 0 && s->d1->next_timeout.tv_usec == 0)
                {
@@ -255,6 +347,16 @@ struct timeval* dtls1_get_timeout(SSL *s, struct timeval* timeleft)
                timeleft->tv_usec += 1000000;
                }
 
+       /* If remaining time is less than 15 ms, set it to 0
+        * to prevent issues because of small devergences with
+        * socket timeouts.
+        */
+       if (timeleft->tv_sec == 0 && timeleft->tv_usec < 15000)
+               {
+               memset(timeleft, 0, sizeof(struct timeval));
+               }
+       
+
        return timeleft;
        }
 
@@ -289,9 +391,63 @@ void dtls1_double_timeout(SSL *s)
 void dtls1_stop_timer(SSL *s)
        {
        /* Reset everything */
+       memset(&(s->d1->timeout), 0, sizeof(struct dtls1_timeout_st));
        memset(&(s->d1->next_timeout), 0, sizeof(struct timeval));
        s->d1->timeout_duration = 1;
        BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT, 0, &(s->d1->next_timeout));
+       /* Clear retransmission buffer */
+       dtls1_clear_record_buffer(s);
+       }
+
+int dtls1_check_timeout_num(SSL *s)
+       {
+       s->d1->timeout.num_alerts++;
+
+       /* Reduce MTU after 2 unsuccessful retransmissions */
+       if (s->d1->timeout.num_alerts > 2)
+               {
+               s->d1->mtu = BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_GET_FALLBACK_MTU, 0, NULL);               
+               }
+
+       if (s->d1->timeout.num_alerts > DTLS1_TMO_ALERT_COUNT)
+               {
+               /* fail the connection, enough alerts have been sent */
+               SSLerr(SSL_F_DTLS1_CHECK_TIMEOUT_NUM,SSL_R_READ_TIMEOUT_EXPIRED);
+               return -1;
+               }
+
+       return 0;
+       }
+
+int dtls1_handle_timeout(SSL *s)
+       {
+       /* if no timer is expired, don't do anything */
+       if (!dtls1_is_timer_expired(s))
+               {
+               return 0;
+               }
+
+       dtls1_double_timeout(s);
+
+       if (dtls1_check_timeout_num(s) < 0)
+               return -1;
+
+       s->d1->timeout.read_timeouts++;
+       if (s->d1->timeout.read_timeouts > DTLS1_TMO_READ_COUNT)
+               {
+               s->d1->timeout.read_timeouts = 1;
+               }
+
+#ifndef OPENSSL_NO_HEARTBEATS
+       if (s->tlsext_hb_pending)
+               {
+               s->tlsext_hb_pending = 0;
+               return dtls1_heartbeat(s);
+               }
+#endif
+
+       dtls1_start_timer(s);
+       return dtls1_retransmit_buffered_messages(s);
        }
 
 static void get_current_time(struct timeval *t)
@@ -310,3 +466,17 @@ static void get_current_time(struct timeval *t)
        gettimeofday(t, NULL);
 #endif
 }
+
+int dtls1_listen(SSL *s, struct sockaddr *client)
+       {
+       int ret;
+
+       SSL_set_options(s, SSL_OP_COOKIE_EXCHANGE);
+       s->d1->listen = 1;
+
+       ret = SSL_accept(s);
+       if (ret <= 0) return ret;
+       
+       (void) BIO_dgram_get_peer(SSL_get_rbio(s), client);
+       return 1;
+       }