update FAQ
[openssl.git] / ssl / d1_lib.c
index f4bfd29..2b066e0 100644 (file)
 #include <openssl/objects.h>
 #include "ssl_locl.h"
 
-#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS)
+#if defined(OPENSSL_SYS_VMS)
 #include <sys/timeb.h>
 #endif
 
 static void get_current_time(struct timeval *t);
+static void dtls1_set_handshake_header(SSL *s, int type, unsigned long len);
+static int dtls1_handshake_write(SSL *s);
 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,
+       tls1_enc,
        tls1_mac,
        tls1_setup_key_block,
        tls1_generate_master_secret,
@@ -83,6 +85,30 @@ SSL3_ENC_METHOD DTLSv1_enc_data={
        TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE,
        tls1_alert_code,
        tls1_export_keying_material,
+       SSL_ENC_FLAG_DTLS|SSL_ENC_FLAG_EXPLICIT_IV,
+       DTLS1_HM_HEADER_LENGTH,
+       dtls1_set_handshake_header,
+       dtls1_handshake_write   
+       };
+
+SSL3_ENC_METHOD DTLSv1_2_enc_data={
+       tls1_enc,
+       tls1_mac,
+       tls1_setup_key_block,
+       tls1_generate_master_secret,
+       tls1_change_cipher_state,
+       tls1_final_finish_mac,
+       TLS1_FINISH_MAC_LENGTH,
+       tls1_cert_verify_mac,
+       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,
+       SSL_ENC_FLAG_DTLS|SSL_ENC_FLAG_EXPLICIT_IV|SSL_ENC_FLAG_SIGALGS
+               |SSL_ENC_FLAG_SHA256_PRF|SSL_ENC_FLAG_TLS1_2_CIPHERS,
+       DTLS1_HM_HEADER_LENGTH,
+       dtls1_set_handshake_header,
+       dtls1_handshake_write   
        };
 
 long dtls1_default_timeout(void)
@@ -196,6 +222,7 @@ void dtls1_free(SSL *s)
        pqueue_free(s->d1->buffered_app_data.q);
 
        OPENSSL_free(s->d1);
+       s->d1 = NULL;
        }
 
 void dtls1_clear(SSL *s)
@@ -240,8 +267,10 @@ void dtls1_clear(SSL *s)
        ssl3_clear(s);
        if (s->options & SSL_OP_CISCO_ANYCONNECT)
                s->version=DTLS1_BAD_VER;
+       else if (s->method->version == DTLS_ANY_VERSION)
+               s->version=DTLS1_2_VERSION;
        else
-               s->version=DTLS1_VERSION;
+               s->version=s->method->version;
        }
 
 long dtls1_ctrl(SSL *s, int cmd, long larg, void *parg)
@@ -391,6 +420,7 @@ 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));
@@ -398,35 +428,43 @@ void dtls1_stop_timer(SSL *s)
        dtls1_clear_record_buffer(s);
        }
 
-int dtls1_handle_timeout(SSL *s)
+int dtls1_check_timeout_num(SSL *s)
        {
-       DTLS1_STATE *state;
+       s->d1->timeout.num_alerts++;
 
-       /* if no timer is expired, don't do anything */
-       if (!dtls1_is_timer_expired(s))
+       /* Reduce MTU after 2 unsuccessful retransmissions */
+       if (s->d1->timeout.num_alerts > 2)
                {
-               return 0;
+               s->d1->mtu = BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_GET_FALLBACK_MTU, 0, NULL);               
                }
 
-       dtls1_double_timeout(s);
-       state = s->d1;
-       state->timeout.num_alerts++;
-       if ( state->timeout.num_alerts > DTLS1_TMO_ALERT_COUNT)
+       if (s->d1->timeout.num_alerts > DTLS1_TMO_ALERT_COUNT)
                {
                /* fail the connection, enough alerts have been sent */
-               SSLerr(SSL_F_DTLS1_HANDLE_TIMEOUT,SSL_R_READ_TIMEOUT_EXPIRED);
+               SSLerr(SSL_F_DTLS1_CHECK_TIMEOUT_NUM,SSL_R_READ_TIMEOUT_EXPIRED);
                return -1;
                }
 
-       state->timeout.read_timeouts++;
-       if ( state->timeout.read_timeouts > DTLS1_TMO_READ_COUNT)
+       return 0;
+       }
+
+int dtls1_handle_timeout(SSL *s)
+       {
+       /* if no timer is expired, don't do anything */
+       if (!dtls1_is_timer_expired(s))
                {
-               state->timeout.read_timeouts = 1;
+               return 0;
                }
 
-       if (state->timeout_duration > 2)
+       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->mtu = BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_GET_FALLBACK_MTU, 0, NULL);               
+               s->d1->timeout.read_timeouts = 1;
                }
 
 #ifndef OPENSSL_NO_HEARTBEATS
@@ -443,11 +481,15 @@ int dtls1_handle_timeout(SSL *s)
 
 static void get_current_time(struct timeval *t)
 {
-#ifdef OPENSSL_SYS_WIN32
-       struct _timeb tb;
-       _ftime(&tb);
-       t->tv_sec = (long)tb.time;
-       t->tv_usec = (long)tb.millitm * 1000;
+#if defined(_WIN32)
+       SYSTEMTIME st;
+       union { unsigned __int64 ul; FILETIME ft; } now;
+
+       GetSystemTime(&st);
+       SystemTimeToFileTime(&st,&now.ft);
+       now.ul -= 116444736000000000UI64;       /* re-bias to 1/1/1970 */
+       t->tv_sec  = (long)(now.ul/10000000);
+       t->tv_usec = ((int)(now.ul%10000000))/10;
 #elif defined(OPENSSL_SYS_VMS)
        struct timeb tb;
        ftime(&tb);
@@ -471,3 +513,18 @@ int dtls1_listen(SSL *s, struct sockaddr *client)
        (void) BIO_dgram_get_peer(SSL_get_rbio(s), client);
        return 1;
        }
+
+static void dtls1_set_handshake_header(SSL *s, int htype, unsigned long len)
+       {
+       unsigned char *p = (unsigned char *)s->init_buf->data;
+       dtls1_set_message_header(s, p, htype, len, 0, len);
+       s->init_num = (int)len + DTLS1_HM_HEADER_LENGTH;
+       s->init_off = 0;
+       /* Buffer the message to handle re-xmits */
+       dtls1_buffer_message(s, 0);
+       }
+
+static int dtls1_handshake_write(SSL *s)
+       {
+       return dtls1_do_write(s, SSL3_RT_HANDSHAKE);
+       }