/* ssl/d1_clnt.c */ /* * DTLS implementation written by Nagendra Modadugu * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. */ /* ==================================================================== * Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * openssl-core@OpenSSL.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include #include "ssl_locl.h" #ifndef OPENSSL_NO_KRB5 # include "kssl_lcl.h" #endif #include #include #include #include #include #include #ifndef OPENSSL_NO_DH # include #endif static const SSL_METHOD *dtls1_get_client_method(int ver); static int dtls1_get_hello_verify(SSL *s); static const SSL_METHOD *dtls1_get_client_method(int ver) { if (ver == DTLS_ANY_VERSION) return DTLS_client_method(); else if (ver == DTLS1_VERSION || ver == DTLS1_BAD_VER) return DTLSv1_client_method(); else if (ver == DTLS1_2_VERSION) return DTLSv1_2_client_method(); else return NULL; } IMPLEMENT_dtls1_meth_func(DTLS1_VERSION, DTLSv1_client_method, ssl_undefined_function, dtls1_connect, dtls1_get_client_method, DTLSv1_enc_data) IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION, DTLSv1_2_client_method, ssl_undefined_function, dtls1_connect, dtls1_get_client_method, DTLSv1_2_enc_data) IMPLEMENT_dtls1_meth_func(DTLS_ANY_VERSION, DTLS_client_method, ssl_undefined_function, dtls1_connect, dtls1_get_client_method, DTLSv1_2_enc_data) int dtls1_connect(SSL *s) { 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; s->state = SSL_ST_ERR; goto end; } /* s->version=SSL3_VERSION; */ s->type = SSL_ST_CONNECT; if (s->init_buf == NULL) { if ((buf = BUF_MEM_new()) == NULL) { ret = -1; s->state = SSL_ST_ERR; goto end; } if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) { ret = -1; s->state = SSL_ST_ERR; goto end; } s->init_buf = buf; buf = NULL; } if (!ssl3_setup_buffers(s)) { ret = -1; s->state = SSL_ST_ERR; goto end; } /* setup buffing BIO */ if (!ssl_init_wbio_buffer(s, 0)) { ret = -1; s->state = SSL_ST_ERR; 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: s->shutdown = 0; /* every DTLS ClientHello resets Finished MAC */ ssl3_init_finished_mac(s); case SSL3_ST_CW_CLNT_HELLO_B: dtls1_start_timer(s); ret = ssl3_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); if (SSL_export_keying_material(s, sctpauthkey, sizeof(sctpauthkey), labelbuffer, sizeof(labelbuffer), NULL, 0, 0) <= 0) { ret = -1; s->state = SSL_ST_ERR; goto end; } BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, sizeof(sctpauthkey), sctpauthkey); #endif s->state = SSL3_ST_CR_FINISHED_A; if (s->tlsext_ticket_expected) { /* receive renewed session ticket */ s->state = SSL3_ST_CR_SESSION_TICKET_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; s->state = SSL_ST_ERR; 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 = ssl3_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 = ssl3_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); if (SSL_export_keying_material(s, sctpauthkey, sizeof(sctpauthkey), labelbuffer, sizeof(labelbuffer), NULL, 0, 0) <= 0) { ret = -1; s->state = SSL_ST_ERR; goto end; } 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 = ssl3_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; #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; s->state = SSL_ST_ERR; goto end; } if (!s->method->ssl3_enc->change_cipher_state(s, SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { ret = -1; s->state = SSL_ST_ERR; goto end; } #ifndef OPENSSL_NO_SCTP if (s->hit) { /* * 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 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); break; case SSL3_ST_CW_FINISHED_A: case SSL3_ST_CW_FINISHED_B: if (!s->hit) dtls1_start_timer(s); ret = ssl3_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; #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_CW_WRITE_SOCK; } #endif if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) { s->state = SSL_ST_OK; #ifndef OPENSSL_NO_SCTP if (BIO_dgram_is_sctp(SSL_get_wbio(s))) { s->d1->next_state = SSL_ST_OK; s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK; } #endif s->s3->flags |= SSL3_FLAGS_POP_BUFFER; s->s3->delay_buf_pop_ret = 0; } } else { #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 #ifndef OPENSSL_NO_TLSEXT /* * Allow NewSessionTicket if ticket expected */ if (s->tlsext_ticket_expected) s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A; else #endif s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A; } s->init_num = 0; break; #ifndef OPENSSL_NO_TLSEXT case SSL3_ST_CR_SESSION_TICKET_A: case SSL3_ST_CR_SESSION_TICKET_B: ret = ssl3_get_new_session_ticket(s); if (ret <= 0) goto end; s->state = SSL3_ST_CR_FINISHED_A; s->init_num = 0; break; case SSL3_ST_CR_CERT_STATUS_A: case SSL3_ST_CR_CERT_STATUS_B: ret = ssl3_get_cert_status(s); if (ret <= 0) goto end; s->state = SSL3_ST_CR_KEY_EXCH_A; s->init_num = 0; break; #endif case SSL3_ST_CR_FINISHED_A: case SSL3_ST_CR_FINISHED_B: s->d1->change_cipher_spec_ok = 1; 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; #ifndef OPENSSL_NO_SCTP if (BIO_dgram_is_sctp(SSL_get_wbio(s)) && state == SSL_ST_RENEGOTIATE) { s->d1->next_state = s->state; s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK; } #endif s->init_num = 0; break; case SSL3_ST_CW_FLUSH: s->rwstate = SSL_WRITING; if (BIO_flush(s->wbio) <= 0) { /* * 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; 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; } #endif /* * If we are not 'joining' the last two packets, remove the * buffering now */ if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) ssl_free_wbio_buffer(s); /* else do it later in ssl3_write */ s->init_num = 0; s->renegotiate = 0; s->new_session = 0; ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); if (s->hit) s->ctx->stats.sess_hit++; ret = 1; /* s->server=0; */ s->handshake_func = dtls1_connect; s->ctx->stats.sess_connect_good++; if (cb != NULL) cb(s, SSL_CB_HANDSHAKE_DONE, 1); /* done with handshaking */ s->d1->handshake_read_seq = 0; s->d1->next_handshake_write_seq = 0; dtls1_clear_received_buffer(s); goto end; /* break; */ case SSL_ST_ERR: default: SSLerr(SSL_F_DTLS1_CONNECT, SSL_R_UNKNOWN_STATE); ret = -1; goto end; /* break; */ } /* did we do anything */ if (!s->s3->tmp.reuse_message && !skip) { if (s->debug) { if ((ret = BIO_flush(s->wbio)) <= 0) goto end; } if ((cb != NULL) && (s->state != state)) { new_state = s->state; s->state = state; cb(s, SSL_CB_CONNECT_LOOP, 1); s->state = new_state; } } skip = 0; } end: s->in_handshake--; #ifndef OPENSSL_NO_SCTP /* * Notify SCTP BIO socket to leave handshake mode and allow 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 (buf != NULL) BUF_MEM_free(buf); if (cb != NULL) cb(s, SSL_CB_CONNECT_EXIT, ret); return (ret); } static int dtls1_get_hello_verify(SSL *s) { int n, al, ok = 0; unsigned char *data; unsigned int cookie_len; s->first_packet = 1; n = s->method->ssl_get_message(s, DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A, DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B, -1, s->max_cert_list, &ok); s->first_packet = 0; if (!ok) return ((int)n); if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST) { s->d1->send_cookie = 0; s->s3->tmp.reuse_message = 1; return (1); } data = (unsigned char *)s->init_msg; #if 0 if (s->method->version != DTLS_ANY_VERSION && ((data[0] != (s->version >> 8)) || (data[1] != (s->version & 0xff)))) { SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY, SSL_R_WRONG_SSL_VERSION); s->version = (s->version & 0xff00) | data[1]; al = SSL_AD_PROTOCOL_VERSION; goto f_err; } #endif data += 2; cookie_len = *(data++); if (cookie_len > sizeof(s->d1->cookie)) { al = SSL_AD_ILLEGAL_PARAMETER; goto f_err; } memcpy(s->d1->cookie, data, cookie_len); s->d1->cookie_len = cookie_len; s->d1->send_cookie = 1; return 1; f_err: ssl3_send_alert(s, SSL3_AL_FATAL, al); s->state = SSL_ST_ERR; return -1; }