- {
- BUF_MEM *buf=NULL;
- unsigned long Time=(unsigned long)time(NULL);
- long num1;
- void (*cb)(const SSL *ssl,int type,int val)=NULL;
- int ret= -1;
- int new_state,state,skip=0;;
-
- RAND_add(&Time,sizeof(Time),0);
- ERR_clear_error();
- clear_sys_error();
-
- if (s->info_callback != NULL)
- cb=s->info_callback;
- else if (s->ctx->info_callback != NULL)
- cb=s->ctx->info_callback;
-
- s->in_handshake++;
- if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
-
- for (;;)
- {
- state=s->state;
-
- switch(s->state)
- {
- case SSL_ST_RENEGOTIATE:
- s->new_session=1;
- s->state=SSL_ST_CONNECT;
- s->ctx->stats.sess_connect_renegotiate++;
- /* break */
- case SSL_ST_BEFORE:
- case SSL_ST_CONNECT:
- case SSL_ST_BEFORE|SSL_ST_CONNECT:
- case SSL_ST_OK|SSL_ST_CONNECT:
-
- s->server=0;
- if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
-
- if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00) &&
- (s->version & 0xff00 ) != (DTLS1_BAD_VER & 0xff00))
- {
- SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
- ret = -1;
- goto end;
- }
-
- /* s->version=SSL3_VERSION; */
- s->type=SSL_ST_CONNECT;
-
- if (s->init_buf == NULL)
- {
- if ((buf=BUF_MEM_new()) == NULL)
- {
- ret= -1;
- goto end;
- }
- if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
- {
- ret= -1;
- goto end;
- }
- s->init_buf=buf;
- buf=NULL;
- }
-
- if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
-
- /* setup buffing BIO */
- if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
-
- /* don't push the buffering BIO quite yet */
-
- s->state=SSL3_ST_CW_CLNT_HELLO_A;
- s->ctx->stats.sess_connect++;
- s->init_num=0;
- /* mark client_random uninitialized */
- memset(s->s3->client_random,0,sizeof(s->s3->client_random));
- break;
-
- case SSL3_ST_CW_CLNT_HELLO_A:
- case SSL3_ST_CW_CLNT_HELLO_B:
-
- s->shutdown=0;
-
- /* every DTLS ClientHello resets Finished MAC */
- ssl3_init_finished_mac(s);
-
- dtls1_start_timer(s);
- ret=dtls1_client_hello(s);
- if (ret <= 0) goto end;
-
- if ( s->d1->send_cookie)
- {
- s->state=SSL3_ST_CW_FLUSH;
- s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A;
- }
- else
- s->state=SSL3_ST_CR_SRVR_HELLO_A;
-
- s->init_num=0;
-
- /* turn on buffering for the next lot of output */
- if (s->bbio != s->wbio)
- s->wbio=BIO_push(s->bbio,s->wbio);
-
- break;
-
- case SSL3_ST_CR_SRVR_HELLO_A:
- case SSL3_ST_CR_SRVR_HELLO_B:
- ret=ssl3_get_server_hello(s);
- if (ret <= 0) goto end;
- else
- {
- dtls1_stop_timer(s);
- if (s->hit)
- s->state=SSL3_ST_CR_FINISHED_A;
- else
- s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
- }
- s->init_num=0;
- break;
-
- case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
- case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
-
- ret = dtls1_get_hello_verify(s);
- if ( ret <= 0)
- goto end;
- dtls1_stop_timer(s);
- if ( s->d1->send_cookie) /* start again, with a cookie */
- s->state=SSL3_ST_CW_CLNT_HELLO_A;
- else
- s->state = SSL3_ST_CR_CERT_A;
- s->init_num = 0;
- break;
-
- case SSL3_ST_CR_CERT_A:
- case SSL3_ST_CR_CERT_B:
- /* Check if it is anon DH or PSK */
- if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
- !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
- {
- ret=ssl3_get_server_certificate(s);
- if (ret <= 0) goto end;
- }
- else
- skip=1;
- s->state=SSL3_ST_CR_KEY_EXCH_A;
- s->init_num=0;
- break;
-
- case SSL3_ST_CR_KEY_EXCH_A:
- case SSL3_ST_CR_KEY_EXCH_B:
- ret=ssl3_get_key_exchange(s);
- if (ret <= 0) goto end;
- s->state=SSL3_ST_CR_CERT_REQ_A;
- s->init_num=0;
-
- /* at this point we check that we have the
- * required stuff from the server */
- if (!ssl3_check_cert_and_algorithm(s))
- {
- ret= -1;
- goto end;
- }
- break;
-
- case SSL3_ST_CR_CERT_REQ_A:
- case SSL3_ST_CR_CERT_REQ_B:
- ret=ssl3_get_certificate_request(s);
- if (ret <= 0) goto end;
- s->state=SSL3_ST_CR_SRVR_DONE_A;
- s->init_num=0;
- break;
-
- case SSL3_ST_CR_SRVR_DONE_A:
- case SSL3_ST_CR_SRVR_DONE_B:
- ret=ssl3_get_server_done(s);
- if (ret <= 0) goto end;
- if (s->s3->tmp.cert_req)
- s->state=SSL3_ST_CW_CERT_A;
- else
- s->state=SSL3_ST_CW_KEY_EXCH_A;
- s->init_num=0;
-
- break;
-
- case SSL3_ST_CW_CERT_A:
- case SSL3_ST_CW_CERT_B:
- case SSL3_ST_CW_CERT_C:
- case SSL3_ST_CW_CERT_D:
- dtls1_start_timer(s);
- ret=dtls1_send_client_certificate(s);
- if (ret <= 0) goto end;
- s->state=SSL3_ST_CW_KEY_EXCH_A;
- s->init_num=0;
- break;
-
- case SSL3_ST_CW_KEY_EXCH_A:
- case SSL3_ST_CW_KEY_EXCH_B:
- dtls1_start_timer(s);
- ret=dtls1_send_client_key_exchange(s);
- if (ret <= 0) goto end;
- /* EAY EAY EAY need to check for DH fix cert
- * sent back */
- /* For TLS, cert_req is set to 2, so a cert chain
- * of nothing is sent, but no verify packet is sent */
- if (s->s3->tmp.cert_req == 1)
- {
- s->state=SSL3_ST_CW_CERT_VRFY_A;
- }
- else
- {
- s->state=SSL3_ST_CW_CHANGE_A;
- s->s3->change_cipher_spec=0;
- }
-
- s->init_num=0;
- break;
-
- case SSL3_ST_CW_CERT_VRFY_A:
- case SSL3_ST_CW_CERT_VRFY_B:
- dtls1_start_timer(s);
- ret=dtls1_send_client_verify(s);
- if (ret <= 0) goto end;
- s->state=SSL3_ST_CW_CHANGE_A;
- s->init_num=0;
- s->s3->change_cipher_spec=0;
- break;
-
- case SSL3_ST_CW_CHANGE_A:
- case SSL3_ST_CW_CHANGE_B:
- dtls1_start_timer(s);
- ret=dtls1_send_change_cipher_spec(s,
- SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
- if (ret <= 0) goto end;
- s->state=SSL3_ST_CW_FINISHED_A;
- s->init_num=0;
-
- s->session->cipher=s->s3->tmp.new_cipher;
+{
+ BUF_MEM *buf = NULL;
+ unsigned long Time = (unsigned long)time(NULL);
+ void (*cb) (const SSL *ssl, int type, int val) = NULL;
+ int ret = -1;
+ int new_state, state, skip = 0;
+#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();
+ clear_sys_error();
+
+ if (s->info_callback != NULL)
+ cb = s->info_callback;
+ else if (s->ctx->info_callback != NULL)
+ cb = s->ctx->info_callback;
+
+ s->in_handshake++;
+ if (!SSL_in_init(s) || SSL_in_before(s))
+ SSL_clear(s);
+
+#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
+
+#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;
+
+ switch (s->state) {
+ case SSL_ST_RENEGOTIATE:
+ s->renegotiate = 1;
+ s->state = SSL_ST_CONNECT;
+ s->ctx->stats.sess_connect_renegotiate++;
+ /* break */
+ case SSL_ST_BEFORE:
+ case SSL_ST_CONNECT:
+ case SSL_ST_BEFORE | SSL_ST_CONNECT:
+ case SSL_ST_OK | SSL_ST_CONNECT:
+
+ s->server = 0;
+ if (cb != NULL)
+ cb(s, SSL_CB_HANDSHAKE_START, 1);
+
+ if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00) &&
+ (s->version & 0xff00) != (DTLS1_BAD_VER & 0xff00)) {
+ SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
+ ret = -1;
+ goto end;
+ }
+
+ /* s->version=SSL3_VERSION; */
+ s->type = SSL_ST_CONNECT;
+
+ if (s->init_buf == NULL) {
+ if ((buf = BUF_MEM_new()) == NULL) {
+ ret = -1;
+ goto end;
+ }
+ if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) {
+ ret = -1;
+ goto end;
+ }
+ s->init_buf = buf;
+ buf = NULL;
+ }
+
+ if (!ssl3_setup_buffers(s)) {
+ ret = -1;
+ goto end;
+ }
+
+ /* setup buffing BIO */
+ if (!ssl_init_wbio_buffer(s, 0)) {
+ ret = -1;
+ goto end;
+ }
+
+ /* don't push the buffering BIO quite yet */
+
+ s->state = SSL3_ST_CW_CLNT_HELLO_A;
+ s->ctx->stats.sess_connect++;
+ s->init_num = 0;
+ /* mark client_random uninitialized */
+ memset(s->s3->client_random, 0, sizeof(s->s3->client_random));
+ s->d1->send_cookie = 0;
+ s->hit = 0;
+ s->d1->change_cipher_spec_ok = 0;
+ /*
+ * Should have been reset by ssl3_get_finished, too.
+ */
+ s->s3->change_cipher_spec = 0;
+ break;
+
+#ifndef OPENSSL_NO_SCTP
+ case DTLS1_SCTP_ST_CR_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 = s->s3->tmp.next_state;
+ break;
+
+ case DTLS1_SCTP_ST_CW_WRITE_SOCK:
+ /* read app data until dry event */
+
+ ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
+ if (ret < 0)
+ goto end;
+
+ if (ret == 0) {
+ 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_CW_CLNT_HELLO_A:
+ case SSL3_ST_CW_CLNT_HELLO_B:
+
+ s->shutdown = 0;
+
+ /* every DTLS ClientHello resets Finished MAC */
+ ssl3_init_finished_mac(s);
+
+ dtls1_start_timer(s);
+ ret = dtls1_client_hello(s);
+ if (ret <= 0)
+ goto end;
+
+ if (s->d1->send_cookie) {
+ s->state = SSL3_ST_CW_FLUSH;
+ s->s3->tmp.next_state = SSL3_ST_CR_SRVR_HELLO_A;
+ } else
+ s->state = SSL3_ST_CR_SRVR_HELLO_A;
+
+ s->init_num = 0;
+
+#ifndef OPENSSL_NO_SCTP
+ /* Disable buffering for SCTP */
+ if (!BIO_dgram_is_sctp(SSL_get_wbio(s))) {
+#endif
+ /*
+ * turn on buffering for the next lot of output
+ */
+ if (s->bbio != s->wbio)
+ s->wbio = BIO_push(s->bbio, s->wbio);
+#ifndef OPENSSL_NO_SCTP
+ }
+#endif
+
+ break;
+
+ case SSL3_ST_CR_SRVR_HELLO_A:
+ case SSL3_ST_CR_SRVR_HELLO_B:
+ ret = ssl3_get_server_hello(s);
+ if (ret <= 0)
+ goto end;
+ else {
+ 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
+
+ s->state = SSL3_ST_CR_FINISHED_A;
+ } else
+ s->state = DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
+ }
+ s->init_num = 0;
+ break;
+
+ case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
+ case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
+
+ ret = dtls1_get_hello_verify(s);
+ if (ret <= 0)
+ goto end;
+ dtls1_stop_timer(s);
+ if (s->d1->send_cookie) /* start again, with a cookie */
+ s->state = SSL3_ST_CW_CLNT_HELLO_A;
+ else
+ s->state = SSL3_ST_CR_CERT_A;
+ s->init_num = 0;
+ break;
+
+ case SSL3_ST_CR_CERT_A:
+ case SSL3_ST_CR_CERT_B:
+ /* Check if it is anon DH or PSK */
+ if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
+ !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
+ ret = ssl3_get_server_certificate(s);
+ if (ret <= 0)
+ goto end;
+#ifndef OPENSSL_NO_TLSEXT
+ if (s->tlsext_status_expected)
+ s->state = SSL3_ST_CR_CERT_STATUS_A;
+ else
+ s->state = SSL3_ST_CR_KEY_EXCH_A;
+ } else {
+ skip = 1;
+ s->state = SSL3_ST_CR_KEY_EXCH_A;
+ }
+#else
+ } else
+ skip = 1;
+
+ s->state = SSL3_ST_CR_KEY_EXCH_A;
+#endif
+ s->init_num = 0;
+ break;
+
+ case SSL3_ST_CR_KEY_EXCH_A:
+ case SSL3_ST_CR_KEY_EXCH_B:
+ ret = ssl3_get_key_exchange(s);
+ if (ret <= 0)
+ goto end;
+ s->state = SSL3_ST_CR_CERT_REQ_A;
+ s->init_num = 0;
+
+ /*
+ * at this point we check that we have the required stuff from
+ * the server
+ */
+ if (!ssl3_check_cert_and_algorithm(s)) {
+ ret = -1;
+ goto end;
+ }
+ break;
+
+ case SSL3_ST_CR_CERT_REQ_A:
+ case SSL3_ST_CR_CERT_REQ_B:
+ ret = ssl3_get_certificate_request(s);
+ if (ret <= 0)
+ goto end;
+ s->state = SSL3_ST_CR_SRVR_DONE_A;
+ s->init_num = 0;
+ break;
+
+ case SSL3_ST_CR_SRVR_DONE_A:
+ case SSL3_ST_CR_SRVR_DONE_B:
+ ret = ssl3_get_server_done(s);
+ if (ret <= 0)
+ goto end;
+ dtls1_stop_timer(s);
+ if (s->s3->tmp.cert_req)
+ s->s3->tmp.next_state = SSL3_ST_CW_CERT_A;
+ else
+ s->s3->tmp.next_state = SSL3_ST_CW_KEY_EXCH_A;
+ s->init_num = 0;
+
+#ifndef OPENSSL_NO_SCTP
+ if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
+ state == SSL_ST_RENEGOTIATE)
+ s->state = DTLS1_SCTP_ST_CR_READ_SOCK;
+ else
+#endif
+ s->state = s->s3->tmp.next_state;
+ break;
+
+ case SSL3_ST_CW_CERT_A:
+ case SSL3_ST_CW_CERT_B:
+ case SSL3_ST_CW_CERT_C:
+ case SSL3_ST_CW_CERT_D:
+ dtls1_start_timer(s);
+ ret = dtls1_send_client_certificate(s);
+ if (ret <= 0)
+ goto end;
+ s->state = SSL3_ST_CW_KEY_EXCH_A;
+ s->init_num = 0;
+ break;
+
+ case SSL3_ST_CW_KEY_EXCH_A:
+ case SSL3_ST_CW_KEY_EXCH_B:
+ dtls1_start_timer(s);
+ ret = dtls1_send_client_key_exchange(s);
+ if (ret <= 0)
+ goto end;
+
+#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
+
+ /*
+ * EAY EAY EAY need to check for DH fix cert sent back
+ */
+ /*
+ * For TLS, cert_req is set to 2, so a cert chain of nothing is
+ * sent, but no verify packet is sent
+ */
+ if (s->s3->tmp.cert_req == 1) {
+ s->state = SSL3_ST_CW_CERT_VRFY_A;
+ } else {
+#ifndef OPENSSL_NO_SCTP
+ if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
+ s->d1->next_state = SSL3_ST_CW_CHANGE_A;
+ s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
+ } else
+#endif
+ s->state = SSL3_ST_CW_CHANGE_A;
+ }
+
+ s->init_num = 0;
+ break;
+
+ case SSL3_ST_CW_CERT_VRFY_A:
+ case SSL3_ST_CW_CERT_VRFY_B:
+ dtls1_start_timer(s);
+ ret = dtls1_send_client_verify(s);
+ if (ret <= 0)
+ goto end;
+#ifndef OPENSSL_NO_SCTP
+ if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
+ s->d1->next_state = SSL3_ST_CW_CHANGE_A;
+ s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
+ } else
+#endif
+ s->state = SSL3_ST_CW_CHANGE_A;
+ s->init_num = 0;
+ break;
+
+ case SSL3_ST_CW_CHANGE_A:
+ case SSL3_ST_CW_CHANGE_B:
+ if (!s->hit)
+ dtls1_start_timer(s);
+ ret = dtls1_send_change_cipher_spec(s,
+ SSL3_ST_CW_CHANGE_A,
+ SSL3_ST_CW_CHANGE_B);
+ if (ret <= 0)
+ goto end;
+
+ s->state = SSL3_ST_CW_FINISHED_A;
+ s->init_num = 0;
+
+ s->session->cipher = s->s3->tmp.new_cipher;