- {
- 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;
-#ifdef OPENSSL_NO_COMP
- s->session->compress_meth=0;
-#else
- if (s->s3->tmp.new_compression == NULL)
- s->session->compress_meth=0;
- else
- s->session->compress_meth=
- s->s3->tmp.new_compression->id;
-#endif
- if (!s->method->ssl3_enc->setup_key_block(s))
- {
- ret= -1;
- goto end;
- }
-
- if (!s->method->ssl3_enc->change_cipher_state(s,
- SSL3_CHANGE_CIPHER_CLIENT_WRITE))
- {
- ret= -1;
- goto end;
- }
-
- dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
- break;
-
- case SSL3_ST_CW_FINISHED_A:
- case SSL3_ST_CW_FINISHED_B:
- dtls1_start_timer(s);
- ret=dtls1_send_finished(s,
- SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
- s->method->ssl3_enc->client_finished_label,
- s->method->ssl3_enc->client_finished_label_len);
- if (ret <= 0) goto end;
- s->state=SSL3_ST_CW_FLUSH;
-
- /* clear flags */
- s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
- if (s->hit)
- {
- s->s3->tmp.next_state=SSL_ST_OK;
- if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
- {
- s->state=SSL_ST_OK;
- s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
- s->s3->delay_buf_pop_ret=0;
- }
- }
- else
- {
- s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
- }
- s->init_num=0;
- break;
-
- case SSL3_ST_CR_FINISHED_A:
- case SSL3_ST_CR_FINISHED_B:
-
- ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
- SSL3_ST_CR_FINISHED_B);
- if (ret <= 0) goto end;
- dtls1_stop_timer(s);
-
- if (s->hit)
- s->state=SSL3_ST_CW_CHANGE_A;
- else
- s->state=SSL_ST_OK;
- s->init_num=0;
- break;
-
- case SSL3_ST_CW_FLUSH:
- /* number of bytes to be flushed */
- num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
- if (num1 > 0)
- {
- s->rwstate=SSL_WRITING;
- num1=BIO_flush(s->wbio);
- if (num1 <= 0) { ret= -1; goto end; }
- s->rwstate=SSL_NOTHING;
- }
-
- s->state=s->s3->tmp.next_state;
- break;
-
- case SSL_ST_OK:
- /* clean a few things up */
- ssl3_cleanup_key_block(s);
-
-#if 0
- if (s->init_buf != NULL)
- {
- BUF_MEM_free(s->init_buf);
- s->init_buf=NULL;
- }