X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=ssl%2Fd1_srvr.c;h=7ab9091836bd046afcaf8cf40619c11dede1ec9e;hp=ac09b45ef186d6b868cdeeca3dab09677cd29af4;hb=74ecfab401fe65d23d9b297bf396efca3e419e47;hpb=58f41a926a73bd5c49beb91991b486d4e0b544f5

diff --git a/ssl/d1_srvr.c b/ssl/d1_srvr.c
index ac09b45ef1..7ab9091836 100644
--- a/ssl/d1_srvr.c
+++ b/ssl/d1_srvr.c
@@ -147,10 +147,14 @@ int dtls1_accept(SSL *s)
 	BUF_MEM *buf;
 	unsigned long Time=(unsigned long)time(NULL);
 	void (*cb)(const SSL *ssl,int type,int val)=NULL;
-	long num1;
 	unsigned long alg_k;
 	int ret= -1;
 	int new_state,state,skip=0;
+	int listen;
+#ifndef OPENSSL_NO_SCTP
+	unsigned char sctpauthkey[64];
+	char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
+#endif
 
 	RAND_add(&Time,sizeof(Time),0);
 	ERR_clear_error();
@@ -160,17 +164,41 @@ int dtls1_accept(SSL *s)
 		cb=s->info_callback;
 	else if (s->ctx->info_callback != NULL)
 		cb=s->ctx->info_callback;
+	
+	listen = s->d1->listen;
 
 	/* init things to blank */
 	s->in_handshake++;
 	if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
 
+	s->d1->listen = listen;
+#ifndef OPENSSL_NO_SCTP
+	/* Notify SCTP BIO socket to enter handshake
+	 * mode and prevent stream identifier other
+	 * than 0. Will be ignored if no SCTP is used.
+	 */
+	BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
+#endif
+
 	if (s->cert == NULL)
 		{
 		SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
 		return(-1);
 		}
 
+#ifndef OPENSSL_NO_HEARTBEATS
+	/* If we're awaiting a HeartbeatResponse, pretend we
+	 * already got and don't await it anymore, because
+	 * Heartbeats don't make sense during handshakes anyway.
+	 */
+	if (s->tlsext_hb_pending)
+		{
+		dtls1_stop_timer(s);
+		s->tlsext_hb_pending = 0;
+		s->tlsext_hb_seq++;
+		}
+#endif
+
 	for (;;)
 		{
 		state=s->state;
@@ -178,7 +206,7 @@ int dtls1_accept(SSL *s)
 		switch (s->state)
 			{
 		case SSL_ST_RENEGOTIATE:
-			s->new_session=1;
+			s->renegotiate=1;
 			/* s->state=SSL_ST_ACCEPT; */
 
 		case SSL_ST_BEFORE:
@@ -223,8 +251,12 @@ int dtls1_accept(SSL *s)
 				{
 				/* Ok, we now need to push on a buffering BIO so that
 				 * the output is sent in a way that TCP likes :-)
+				 * ...but not with SCTP :-)
 				 */
-				if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
+#ifndef OPENSSL_NO_SCTP
+				if (!BIO_dgram_is_sctp(SSL_get_wbio(s)))
+#endif
+					if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
 
 				ssl3_init_finished_mac(s);
 				s->state=SSL3_ST_SR_CLNT_HELLO_A;
@@ -238,11 +270,6 @@ int dtls1_accept(SSL *s)
 				s->state=SSL3_ST_SW_HELLO_REQ_A;
 				}
 
-			if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE))
-				s->d1->send_cookie = 1;
-			else
-				s->d1->send_cookie = 0;
-			
 			break;
 
 		case SSL3_ST_SW_HELLO_REQ_A:
@@ -271,23 +298,41 @@ int dtls1_accept(SSL *s)
 			ret=ssl3_get_client_hello(s);
 			if (ret <= 0) goto end;
 			dtls1_stop_timer(s);
-			s->new_session = 2;
 
-			if (s->d1->send_cookie)
+			if (ret == 1 && (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE))
 				s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A;
 			else
 				s->state = SSL3_ST_SW_SRVR_HELLO_A;
 
 			s->init_num=0;
+
+			/* Reflect ClientHello sequence to remain stateless while listening */
+			if (listen)
+				{
+				memcpy(s->s3->write_sequence, s->s3->read_sequence, sizeof(s->s3->write_sequence));
+				}
+
+			/* If we're just listening, stop here */
+			if (listen && s->state == SSL3_ST_SW_SRVR_HELLO_A)
+				{
+				ret = 2;
+				s->d1->listen = 0;
+				/* Set expected sequence numbers
+				 * to continue the handshake.
+				 */
+				s->d1->handshake_read_seq = 2;
+				s->d1->handshake_write_seq = 1;
+				s->d1->next_handshake_write_seq = 1;
+				goto end;
+				}
+			
 			break;
 			
 		case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A:
 		case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B:
 
-			dtls1_start_timer(s);
 			ret = dtls1_send_hello_verify_request(s);
 			if ( ret <= 0) goto end;
-			s->d1->send_cookie = 0;
 			s->state=SSL3_ST_SW_FLUSH;
 			s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A;
 
@@ -296,14 +341,75 @@ int dtls1_accept(SSL *s)
 				ssl3_init_finished_mac(s);
 			break;
 			
+#ifndef OPENSSL_NO_SCTP
+		case DTLS1_SCTP_ST_SR_READ_SOCK:
+			
+			if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s)))		
+				{
+				s->s3->in_read_app_data=2;
+				s->rwstate=SSL_READING;
+				BIO_clear_retry_flags(SSL_get_rbio(s));
+				BIO_set_retry_read(SSL_get_rbio(s));
+				ret = -1;
+				goto end;
+				}
+			
+			s->state=SSL3_ST_SR_FINISHED_A;
+			break;
+			
+		case DTLS1_SCTP_ST_SW_WRITE_SOCK:
+			ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
+			if (ret < 0) goto end;
+			
+			if (ret == 0)
+				{
+				if (s->d1->next_state != SSL_ST_OK)
+					{
+					s->s3->in_read_app_data=2;
+					s->rwstate=SSL_READING;
+					BIO_clear_retry_flags(SSL_get_rbio(s));
+					BIO_set_retry_read(SSL_get_rbio(s));
+					ret = -1;
+					goto end;
+					}
+				}
+
+			s->state=s->d1->next_state;
+			break;
+#endif
+
 		case SSL3_ST_SW_SRVR_HELLO_A:
 		case SSL3_ST_SW_SRVR_HELLO_B:
+			s->renegotiate = 2;
 			dtls1_start_timer(s);
 			ret=dtls1_send_server_hello(s);
 			if (ret <= 0) goto end;
 
 			if (s->hit)
+				{
+#ifndef OPENSSL_NO_SCTP
+				/* Add new shared key for SCTP-Auth,
+				 * will be ignored if no SCTP used.
+				 */
+				snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
+				         DTLS1_SCTP_AUTH_LABEL);
+
+				SSL_export_keying_material(s, sctpauthkey,
+				                           sizeof(sctpauthkey), labelbuffer,
+				                           sizeof(labelbuffer), NULL, 0, 0);
+				
+				BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
+                         sizeof(sctpauthkey), sctpauthkey);
+#endif
+#ifndef OPENSSL_NO_TLSEXT
+				if (s->tlsext_ticket_expected)
+					s->state=SSL3_ST_SW_SESSION_TICKET_A;
+				else
+					s->state=SSL3_ST_SW_CHANGE_A;
+#else
 				s->state=SSL3_ST_SW_CHANGE_A;
+#endif
+				}
 			else
 				s->state=SSL3_ST_SW_CERT_A;
 			s->init_num=0;
@@ -318,10 +424,24 @@ int dtls1_accept(SSL *s)
 				dtls1_start_timer(s);
 				ret=dtls1_send_server_certificate(s);
 				if (ret <= 0) goto end;
+#ifndef OPENSSL_NO_TLSEXT
+				if (s->tlsext_status_expected)
+					s->state=SSL3_ST_SW_CERT_STATUS_A;
+				else
+					s->state=SSL3_ST_SW_KEY_EXCH_A;
+				}
+			else
+				{
+				skip = 1;
+				s->state=SSL3_ST_SW_KEY_EXCH_A;
+				}
+#else
 				}
 			else
 				skip=1;
+
 			s->state=SSL3_ST_SW_KEY_EXCH_A;
+#endif
 			s->init_num=0;
 			break;
 
@@ -399,6 +519,13 @@ int dtls1_accept(SSL *s)
 				skip=1;
 				s->s3->tmp.cert_request=0;
 				s->state=SSL3_ST_SW_SRVR_DONE_A;
+#ifndef OPENSSL_NO_SCTP
+				if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
+					{
+					s->d1->next_state = SSL3_ST_SW_SRVR_DONE_A;
+					s->state = DTLS1_SCTP_ST_SW_WRITE_SOCK;
+					}
+#endif
 				}
 			else
 				{
@@ -408,9 +535,23 @@ int dtls1_accept(SSL *s)
 				if (ret <= 0) goto end;
 #ifndef NETSCAPE_HANG_BUG
 				s->state=SSL3_ST_SW_SRVR_DONE_A;
+#ifndef OPENSSL_NO_SCTP
+				if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
+					{
+					s->d1->next_state = SSL3_ST_SW_SRVR_DONE_A;
+					s->state = DTLS1_SCTP_ST_SW_WRITE_SOCK;
+					}
+#endif
 #else
 				s->state=SSL3_ST_SW_FLUSH;
 				s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
+#ifndef OPENSSL_NO_SCTP
+				if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
+					{
+					s->d1->next_state = s->s3->tmp.next_state;
+					s->s3->tmp.next_state=DTLS1_SCTP_ST_SW_WRITE_SOCK;
+					}
+#endif
 #endif
 				s->init_num=0;
 				}
@@ -427,16 +568,20 @@ int dtls1_accept(SSL *s)
 			break;
 		
 		case SSL3_ST_SW_FLUSH:
-			/* number of bytes to be flushed */
-			num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
-			if (num1 > 0)
+			s->rwstate=SSL_WRITING;
+			if (BIO_flush(s->wbio) <= 0)
 				{
-				s->rwstate=SSL_WRITING;
-				num1=BIO_flush(s->wbio);
-				if (num1 <= 0) { ret= -1; goto end; }
-				s->rwstate=SSL_NOTHING;
+				/* If the write error was fatal, stop trying */
+				if (!BIO_should_retry(s->wbio))
+					{
+					s->rwstate=SSL_NOTHING;
+					s->state=s->s3->tmp.next_state;
+					}
+				
+				ret= -1;
+				goto end;
 				}
-
+			s->rwstate=SSL_NOTHING;
 			s->state=s->s3->tmp.next_state;
 			break;
 
@@ -446,15 +591,16 @@ int dtls1_accept(SSL *s)
 			ret = ssl3_check_client_hello(s);
 			if (ret <= 0)
 				goto end;
-			dtls1_stop_timer(s);
 			if (ret == 2)
+				{
+				dtls1_stop_timer(s);
 				s->state = SSL3_ST_SR_CLNT_HELLO_C;
+				}
 			else {
 				/* could be sent for a DH cert, even if we
 				 * have not asked for it :-) */
 				ret=ssl3_get_client_certificate(s);
 				if (ret <= 0) goto end;
-				dtls1_stop_timer(s);
 				s->init_num=0;
 				s->state=SSL3_ST_SR_KEY_EXCH_A;
 			}
@@ -464,7 +610,21 @@ int dtls1_accept(SSL *s)
 		case SSL3_ST_SR_KEY_EXCH_B:
 			ret=ssl3_get_client_key_exchange(s);
 			if (ret <= 0) goto end;
-			dtls1_stop_timer(s);
+#ifndef OPENSSL_NO_SCTP
+			/* Add new shared key for SCTP-Auth,
+			 * will be ignored if no SCTP used.
+			 */
+			snprintf((char *) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
+			         DTLS1_SCTP_AUTH_LABEL);
+
+			SSL_export_keying_material(s, sctpauthkey,
+			                           sizeof(sctpauthkey), labelbuffer,
+			                           sizeof(labelbuffer), NULL, 0, 0);
+
+			BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
+			         sizeof(sctpauthkey), sctpauthkey);
+#endif
+
 			s->state=SSL3_ST_SR_CERT_VRFY_A;
 			s->init_num=0;
 
@@ -501,9 +661,13 @@ int dtls1_accept(SSL *s)
 			/* we should decide if we expected this one */
 			ret=ssl3_get_cert_verify(s);
 			if (ret <= 0) goto end;
-			dtls1_stop_timer(s);
-
-			s->state=SSL3_ST_SR_FINISHED_A;
+#ifndef OPENSSL_NO_SCTP
+			if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
+			    state == SSL_ST_RENEGOTIATE)
+				s->state=DTLS1_SCTP_ST_SR_READ_SOCK;
+			else
+#endif			
+				s->state=SSL3_ST_SR_FINISHED_A;
 			s->init_num=0;
 			break;
 
@@ -516,11 +680,34 @@ int dtls1_accept(SSL *s)
 			dtls1_stop_timer(s);
 			if (s->hit)
 				s->state=SSL_ST_OK;
+#ifndef OPENSSL_NO_TLSEXT
+			else if (s->tlsext_ticket_expected)
+				s->state=SSL3_ST_SW_SESSION_TICKET_A;
+#endif
 			else
 				s->state=SSL3_ST_SW_CHANGE_A;
 			s->init_num=0;
 			break;
 
+#ifndef OPENSSL_NO_TLSEXT
+		case SSL3_ST_SW_SESSION_TICKET_A:
+		case SSL3_ST_SW_SESSION_TICKET_B:
+			ret=dtls1_send_newsession_ticket(s);
+			if (ret <= 0) goto end;
+			s->state=SSL3_ST_SW_CHANGE_A;
+			s->init_num=0;
+			break;
+
+		case SSL3_ST_SW_CERT_STATUS_A:
+		case SSL3_ST_SW_CERT_STATUS_B:
+			ret=ssl3_send_cert_status(s);
+			if (ret <= 0) goto end;
+			s->state=SSL3_ST_SW_KEY_EXCH_A;
+			s->init_num=0;
+			break;
+
+#endif
+
 		case SSL3_ST_SW_CHANGE_A:
 		case SSL3_ST_SW_CHANGE_B:
 
@@ -532,6 +719,14 @@ int dtls1_accept(SSL *s)
 				SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
 
 			if (ret <= 0) goto end;
+
+#ifndef OPENSSL_NO_SCTP
+			/* Change to new shared key of SCTP-Auth,
+			 * will be ignored if no SCTP used.
+			 */
+			BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL);
+#endif
+
 			s->state=SSL3_ST_SW_FINISHED_A;
 			s->init_num=0;
 
@@ -556,7 +751,16 @@ int dtls1_accept(SSL *s)
 			if (s->hit)
 				s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
 			else
+				{
 				s->s3->tmp.next_state=SSL_ST_OK;
+#ifndef OPENSSL_NO_SCTP
+				if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
+					{
+					s->d1->next_state = s->s3->tmp.next_state;
+					s->s3->tmp.next_state=DTLS1_SCTP_ST_SW_WRITE_SOCK;
+					}
+#endif
+				}
 			s->init_num=0;
 			break;
 
@@ -574,11 +778,9 @@ int dtls1_accept(SSL *s)
 
 			s->init_num=0;
 
-			if (s->new_session == 2) /* skipped if we just sent a HelloRequest */
+			if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */
 				{
-				/* actually not necessarily a 'new' session unless
-				 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
-				
+				s->renegotiate=0;
 				s->new_session=0;
 				
 				ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
@@ -630,6 +832,14 @@ end:
 	/* BIO_flush(s->wbio); */
 
 	s->in_handshake--;
+#ifndef OPENSSL_NO_SCTP
+		/* Notify SCTP BIO socket to leave handshake
+		 * mode and prevent stream identifier other
+		 * than 0. Will be ignored if no SCTP is used.
+		 */
+		BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
+#endif
+
 	if (cb != NULL)
 		cb(s,SSL_CB_ACCEPT_EXIT,ret);
 	return(ret);
@@ -670,15 +880,13 @@ int dtls1_send_hello_verify_request(SSL *s)
 		*(p++) = s->version >> 8;
 		*(p++) = s->version & 0xFF;
 
-		if (s->ctx->app_gen_cookie_cb != NULL &&
-		    s->ctx->app_gen_cookie_cb(s, s->d1->cookie, 
-			&(s->d1->cookie_len)) == 0)
+		if (s->ctx->app_gen_cookie_cb == NULL ||
+		     s->ctx->app_gen_cookie_cb(s, s->d1->cookie,
+			 &(s->d1->cookie_len)) == 0)
 			{
 			SSLerr(SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST,ERR_R_INTERNAL_ERROR);
 			return 0;
 			}
-		/* else the cookie is assumed to have 
-		 * been initialized by the application */
 
 		*(p++) = (unsigned char) s->d1->cookie_len;
 		memcpy(p, s->d1->cookie, s->d1->cookie_len);
@@ -692,9 +900,6 @@ int dtls1_send_hello_verify_request(SSL *s)
 		/* number of bytes to write */
 		s->init_num=p-buf;
 		s->init_off=0;
-
-		/* buffer the message to handle re-xmits */
-		dtls1_buffer_message(s, 0);
 		}
 
 	/* s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B */
@@ -715,7 +920,7 @@ int dtls1_send_server_hello(SSL *s)
 		p=s->s3->server_random;
 		Time=(unsigned long)time(NULL);			/* Time */
 		l2n(Time,p);
-		RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
+		RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4);
 		/* Do the message type and length last */
 		d=p= &(buf[DTLS1_HM_HEADER_LENGTH]);
 
@@ -748,6 +953,8 @@ int dtls1_send_server_hello(SSL *s)
 		p+=sl;
 
 		/* put the cipher */
+		if (s->s3->tmp.new_cipher == NULL)
+			return -1;
 		i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
 		p+=i;
 
@@ -761,6 +968,14 @@ int dtls1_send_server_hello(SSL *s)
 			*(p++)=s->s3->tmp.new_compression->id;
 #endif
 
+#ifndef OPENSSL_NO_TLSEXT
+		if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
+			{
+			SSLerr(SSL_F_DTLS1_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR);
+			return -1;
+			}
+#endif
+
 		/* do the header */
 		l=(p-d);
 		d=buf;
@@ -963,12 +1178,11 @@ int dtls1_send_server_key_exchange(SSL *s)
 				SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
 				goto err;
 				}
-			if (!EC_KEY_up_ref(ecdhp))
+			if ((ecdh = EC_KEY_dup(ecdhp)) == NULL)
 				{
 				SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
 				goto err;
 				}
-			ecdh = ecdhp;
 
 			s->s3->tmp.ecdh=ecdh;
 			if ((EC_KEY_get0_public_key(ecdh) == NULL) ||
@@ -1081,7 +1295,7 @@ int dtls1_send_server_key_exchange(SSL *s)
 		if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
 			&& !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
 			{
-			if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
+			if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher, NULL))
 				== NULL)
 				{
 				al=SSL_AD_DECODE_ERROR;
@@ -1205,7 +1419,7 @@ int dtls1_send_server_key_exchange(SSL *s)
 				EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL);
 				EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
 				EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
-				EVP_SignUpdate(&md_ctx,&(d[4]),n);
+				EVP_SignUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n);
 				if (!EVP_SignFinal(&md_ctx,&(p[2]),
 					(unsigned int *)&i,pkey))
 					{
@@ -1355,12 +1569,12 @@ err:
 int dtls1_send_server_certificate(SSL *s)
 	{
 	unsigned long l;
-	X509 *x;
+	CERT_PKEY *cpk;
 
 	if (s->state == SSL3_ST_SW_CERT_A)
 		{
-		x=ssl_get_server_send_cert(s);
-		if (x == NULL)
+		cpk=ssl_get_server_send_pkey(s);
+		if (cpk == NULL)
 			{
 			/* VRS: allow null cert if auth == KRB5 */
 			if ((s->s3->tmp.new_cipher->algorithm_mkey != SSL_kKRB5) ||
@@ -1371,7 +1585,7 @@ int dtls1_send_server_certificate(SSL *s)
 				}
 			}
 
-		l=dtls1_output_cert_chain(s,x);
+		l=dtls1_output_cert_chain(s,cpk);
 		s->state=SSL3_ST_SW_CERT_B;
 		s->init_num=(int)l;
 		s->init_off=0;
@@ -1383,3 +1597,115 @@ int dtls1_send_server_certificate(SSL *s)
 	/* SSL3_ST_SW_CERT_B */
 	return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
 	}
+
+#ifndef OPENSSL_NO_TLSEXT
+int dtls1_send_newsession_ticket(SSL *s)
+	{
+	if (s->state == SSL3_ST_SW_SESSION_TICKET_A)
+		{
+		unsigned char *p, *senc, *macstart;
+		int len, slen;
+		unsigned int hlen, msg_len;
+		EVP_CIPHER_CTX ctx;
+		HMAC_CTX hctx;
+		SSL_CTX *tctx = s->initial_ctx;
+		unsigned char iv[EVP_MAX_IV_LENGTH];
+		unsigned char key_name[16];
+
+		/* get session encoding length */
+		slen = i2d_SSL_SESSION(s->session, NULL);
+		/* Some length values are 16 bits, so forget it if session is
+ 		 * too long
+ 		 */
+		if (slen > 0xFF00)
+			return -1;
+		/* Grow buffer if need be: the length calculation is as
+ 		 * follows 12 (DTLS handshake message header) +
+ 		 * 4 (ticket lifetime hint) + 2 (ticket length) +
+ 		 * 16 (key name) + max_iv_len (iv length) +
+ 		 * session_length + max_enc_block_size (max encrypted session
+ 		 * length) + max_md_size (HMAC).
+ 		 */
+		if (!BUF_MEM_grow(s->init_buf,
+			DTLS1_HM_HEADER_LENGTH + 22 + EVP_MAX_IV_LENGTH +
+			EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + slen))
+			return -1;
+		senc = OPENSSL_malloc(slen);
+		if (!senc)
+			return -1;
+		p = senc;
+		i2d_SSL_SESSION(s->session, &p);
+
+		p=(unsigned char *)&(s->init_buf->data[DTLS1_HM_HEADER_LENGTH]);
+		EVP_CIPHER_CTX_init(&ctx);
+		HMAC_CTX_init(&hctx);
+		/* Initialize HMAC and cipher contexts. If callback present
+		 * it does all the work otherwise use generated values
+		 * from parent ctx.
+		 */
+		if (tctx->tlsext_ticket_key_cb)
+			{
+			if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx,
+							 &hctx, 1) < 0)
+				{
+				OPENSSL_free(senc);
+				return -1;
+				}
+			}
+		else
+			{
+			RAND_pseudo_bytes(iv, 16);
+			EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
+					tctx->tlsext_tick_aes_key, iv);
+			HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
+					tlsext_tick_md(), NULL);
+			memcpy(key_name, tctx->tlsext_tick_key_name, 16);
+			}
+		l2n(s->session->tlsext_tick_lifetime_hint, p);
+		/* Skip ticket length for now */
+		p += 2;
+		/* Output key name */
+		macstart = p;
+		memcpy(p, key_name, 16);
+		p += 16;
+		/* output IV */
+		memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx));
+		p += EVP_CIPHER_CTX_iv_length(&ctx);
+		/* Encrypt session data */
+		EVP_EncryptUpdate(&ctx, p, &len, senc, slen);
+		p += len;
+		EVP_EncryptFinal(&ctx, p, &len);
+		p += len;
+		EVP_CIPHER_CTX_cleanup(&ctx);
+
+		HMAC_Update(&hctx, macstart, p - macstart);
+		HMAC_Final(&hctx, p, &hlen);
+		HMAC_CTX_cleanup(&hctx);
+
+		p += hlen;
+		/* Now write out lengths: p points to end of data written */
+		/* Total length */
+		len = p - (unsigned char *)(s->init_buf->data);
+		/* Ticket length */
+		p=(unsigned char *)&(s->init_buf->data[DTLS1_HM_HEADER_LENGTH]) + 4;
+		s2n(len - DTLS1_HM_HEADER_LENGTH - 6, p);
+
+		/* number of bytes to write */
+		s->init_num= len;
+		s->state=SSL3_ST_SW_SESSION_TICKET_B;
+		s->init_off=0;
+		OPENSSL_free(senc);
+
+		/* XDTLS:  set message header ? */
+		msg_len = s->init_num - DTLS1_HM_HEADER_LENGTH;
+		dtls1_set_message_header(s, (void *)s->init_buf->data,
+			SSL3_MT_NEWSESSION_TICKET, msg_len, 0, msg_len);
+
+		/* buffer the message to handle re-xmits */
+		dtls1_buffer_message(s, 0);
+		}
+
+	/* SSL3_ST_SW_SESSION_TICKET_B */
+	return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
+	}
+#endif