|
- /*
- * 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 <stdio.h>
-
- #include <openssl/bn.h>
- #include <openssl/buf.h>
- #include <openssl/dh.h>
- #include <openssl/evp.h>
- #include <openssl/md5.h>
- #include <openssl/obj.h>
- #include <openssl/rand.h>
- #include <openssl/x509.h>
-
- #include "ssl_locl.h"
-
- static const SSL_METHOD *dtls1_get_server_method(int ver);
- static int dtls1_send_hello_verify_request(SSL *s);
-
- static const SSL_METHOD *dtls1_get_server_method(int ver)
- {
- if (ver == DTLS1_VERSION)
- return(DTLSv1_server_method());
- else if (ver == DTLS1_2_VERSION)
- return(DTLSv1_2_server_method());
- else
- return(NULL);
- }
-
- IMPLEMENT_dtls1_meth_func(DTLS1_VERSION,
- DTLSv1_server_method,
- dtls1_accept,
- ssl_undefined_function,
- dtls1_get_server_method,
- DTLSv1_enc_data)
-
- IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION,
- DTLSv1_2_server_method,
- dtls1_accept,
- ssl_undefined_function,
- dtls1_get_server_method,
- DTLSv1_2_enc_data)
-
- IMPLEMENT_dtls1_meth_func(DTLS_ANY_VERSION,
- DTLS_server_method,
- dtls1_accept,
- ssl_undefined_function,
- dtls1_get_server_method,
- DTLSv1_2_enc_data)
-
- int dtls1_accept(SSL *s)
- {
- BUF_MEM *buf;
- void (*cb)(const SSL *ssl,int type,int val)=NULL;
- unsigned long alg_a;
- int ret= -1;
- int new_state,state,skip=0;
- int listen;
-
- ERR_clear_error();
- ERR_clear_system_error();
-
- if (s->info_callback != NULL)
- 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;
-
- if (s->cert == NULL)
- {
- OPENSSL_PUT_ERROR(SSL, dtls1_accept, SSL_R_NO_CERTIFICATE_SET);
- return(-1);
- }
-
- for (;;)
- {
- state=s->state;
-
- switch (s->state)
- {
- case SSL_ST_RENEGOTIATE:
- s->renegotiate=1;
- /* s->state=SSL_ST_ACCEPT; */
-
- case SSL_ST_BEFORE:
- case SSL_ST_ACCEPT:
- case SSL_ST_BEFORE|SSL_ST_ACCEPT:
- case SSL_ST_OK|SSL_ST_ACCEPT:
-
- s->server=1;
- if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
-
- if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00))
- {
- OPENSSL_PUT_ERROR(SSL, dtls1_accept, ERR_R_INTERNAL_ERROR);
- return -1;
- }
- s->type=SSL_ST_ACCEPT;
-
- 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;
- }
-
- if (!ssl3_setup_buffers(s))
- {
- ret= -1;
- goto end;
- }
-
- s->init_num=0;
-
- if (s->state != SSL_ST_RENEGOTIATE)
- {
- /* 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; }
-
- ssl3_init_finished_mac(s);
- s->state=SSL3_ST_SR_CLNT_HELLO_A;
- s->ctx->stats.sess_accept++;
- }
- else
- {
- /* s->state == SSL_ST_RENEGOTIATE,
- * we will just send a HelloRequest */
- s->ctx->stats.sess_accept_renegotiate++;
- s->state=SSL3_ST_SW_HELLO_REQ_A;
- }
-
- break;
-
- case SSL3_ST_SW_HELLO_REQ_A:
- case SSL3_ST_SW_HELLO_REQ_B:
-
- s->shutdown=0;
- dtls1_clear_record_buffer(s);
- dtls1_start_timer(s);
- ret=ssl3_send_hello_request(s);
- if (ret <= 0) goto end;
- s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A;
- s->state=SSL3_ST_SW_FLUSH;
- s->init_num=0;
-
- ssl3_init_finished_mac(s);
- break;
-
- case SSL3_ST_SW_HELLO_REQ_C:
- s->state=SSL_ST_OK;
- break;
-
- case SSL3_ST_SR_CLNT_HELLO_A:
- case SSL3_ST_SR_CLNT_HELLO_B:
- case SSL3_ST_SR_CLNT_HELLO_C:
- case SSL3_ST_SR_CLNT_HELLO_D:
-
- s->shutdown=0;
- ret=ssl3_get_client_hello(s);
- if (ret <= 0) goto end;
- dtls1_stop_timer(s);
-
- 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:
-
- ret = dtls1_send_hello_verify_request(s);
- if ( ret <= 0) goto end;
- s->state=SSL3_ST_SW_FLUSH;
- s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A;
-
- /* HelloVerifyRequest resets Finished MAC */
- ssl3_init_finished_mac(s);
- break;
-
-
- case SSL3_ST_SW_SRVR_HELLO_A:
- case SSL3_ST_SW_SRVR_HELLO_B:
- s->renegotiate = 2;
- dtls1_start_timer(s);
- ret=ssl3_send_server_hello(s);
- if (ret <= 0) goto end;
-
- if (s->hit)
- {
- 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_CERT_A;
- s->init_num=0;
- break;
-
- case SSL3_ST_SW_CERT_A:
- case SSL3_ST_SW_CERT_B:
- /* Check if it is anon DH or normal PSK */
- if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
- && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
- {
- dtls1_start_timer(s);
- ret=ssl3_send_server_certificate(s);
- if (ret <= 0) goto end;
- if (s->s3->tmp.certificate_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;
- }
- s->init_num=0;
- break;
-
- case SSL3_ST_SW_KEY_EXCH_A:
- case SSL3_ST_SW_KEY_EXCH_B:
- alg_a = s->s3->tmp.new_cipher->algorithm_auth;
-
- /* Send a ServerKeyExchange message if:
- * - The key exchange is ephemeral or anonymous
- * Diffie-Hellman.
- * - There is a PSK identity hint.
- *
- * TODO(davidben): This logic is currently duplicated
- * in s3_srvr.c. Fix this. In the meantime, keep them
- * in sync.
- */
- if (ssl_cipher_requires_server_key_exchange(s->s3->tmp.new_cipher) ||
- ((alg_a & SSL_aPSK) && s->session->psk_identity_hint))
- {
- dtls1_start_timer(s);
- ret=ssl3_send_server_key_exchange(s);
- if (ret <= 0) goto end;
- }
- else
- skip=1;
-
- s->state=SSL3_ST_SW_CERT_REQ_A;
- s->init_num=0;
- break;
-
- case SSL3_ST_SW_CERT_REQ_A:
- case SSL3_ST_SW_CERT_REQ_B:
- if (/* don't request cert unless asked for it: */
- !(s->verify_mode & SSL_VERIFY_PEER) ||
- /* if SSL_VERIFY_CLIENT_ONCE is set,
- * don't request cert during re-negotiation: */
- ((s->session->peer != NULL) &&
- (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
- /* never request cert in anonymous ciphersuites
- * (see section "Certificate request" in SSL 3 drafts
- * and in RFC 2246): */
- ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
- /* ... except when the application insists on verification
- * (against the specs, but s3_clnt.c accepts this for SSL 3) */
- !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
- /* With normal PSK Certificates and
- * Certificate Requests are omitted */
- (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
- {
- /* no cert request */
- skip=1;
- s->s3->tmp.cert_request=0;
- s->state=SSL3_ST_SW_SRVR_DONE_A;
- }
- else
- {
- s->s3->tmp.cert_request=1;
- dtls1_start_timer(s);
- ret=ssl3_send_certificate_request(s);
- if (ret <= 0) goto end;
- #ifndef NETSCAPE_HANG_BUG
- s->state=SSL3_ST_SW_SRVR_DONE_A;
- #else
- s->state=SSL3_ST_SW_FLUSH;
- s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
- #endif
- s->init_num=0;
- }
- break;
-
- case SSL3_ST_SW_SRVR_DONE_A:
- case SSL3_ST_SW_SRVR_DONE_B:
- dtls1_start_timer(s);
- ret=ssl3_send_server_done(s);
- if (ret <= 0) goto end;
- s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
- s->state=SSL3_ST_SW_FLUSH;
- s->init_num=0;
- break;
-
- case SSL3_ST_SW_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 SSL3_ST_SR_CERT_A:
- case SSL3_ST_SR_CERT_B:
- if (s->s3->tmp.cert_request)
- {
- ret=ssl3_get_client_certificate(s);
- if (ret <= 0) goto end;
- }
- s->init_num=0;
- s->state=SSL3_ST_SR_KEY_EXCH_A;
- break;
-
- case SSL3_ST_SR_KEY_EXCH_A:
- case SSL3_ST_SR_KEY_EXCH_B:
- ret=ssl3_get_client_key_exchange(s);
- if (ret <= 0)
- goto end;
- s->state=SSL3_ST_SR_CERT_VRFY_A;
- s->init_num=0;
- break;
-
- case SSL3_ST_SR_CERT_VRFY_A:
- case SSL3_ST_SR_CERT_VRFY_B:
-
- s->d1->change_cipher_spec_ok = 1;
- /* we should decide if we expected this one */
- ret=ssl3_get_cert_verify(s);
- if (ret <= 0) goto end;
- s->state=SSL3_ST_SR_FINISHED_A;
- s->init_num=0;
- break;
-
- case SSL3_ST_SR_FINISHED_A:
- case SSL3_ST_SR_FINISHED_B:
- s->d1->change_cipher_spec_ok = 1;
- ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
- SSL3_ST_SR_FINISHED_B);
- if (ret <= 0) goto end;
- dtls1_stop_timer(s);
- if (s->hit)
- s->state=SSL_ST_OK;
- else if (s->tlsext_ticket_expected)
- s->state=SSL3_ST_SW_SESSION_TICKET_A;
- else
- s->state=SSL3_ST_SW_CHANGE_A;
- s->init_num=0;
- break;
-
- case SSL3_ST_SW_SESSION_TICKET_A:
- case SSL3_ST_SW_SESSION_TICKET_B:
- ret=ssl3_send_new_session_ticket(s);
- if (ret <= 0) goto end;
- s->state=SSL3_ST_SW_CHANGE_A;
- s->init_num=0;
- break;
-
- #if 0
- // TODO(davidben): Implement OCSP stapling on the server.
- 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:
-
- s->session->cipher=s->s3->tmp.new_cipher;
- if (!s->method->ssl3_enc->setup_key_block(s))
- { ret= -1; goto end; }
-
- ret=dtls1_send_change_cipher_spec(s,
- SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
-
- if (ret <= 0) goto end;
-
- s->state=SSL3_ST_SW_FINISHED_A;
- s->init_num=0;
-
- if (!s->method->ssl3_enc->change_cipher_state(s,
- SSL3_CHANGE_CIPHER_SERVER_WRITE))
- {
- ret= -1;
- goto end;
- }
-
- dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
- break;
-
- case SSL3_ST_SW_FINISHED_A:
- case SSL3_ST_SW_FINISHED_B:
- ret=ssl3_send_finished(s,
- SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
- s->method->ssl3_enc->server_finished_label,
- s->method->ssl3_enc->server_finished_label_len);
- if (ret <= 0) goto end;
- s->state=SSL3_ST_SW_FLUSH;
- if (s->hit)
- {
- s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
- }
- else
- {
- s->s3->tmp.next_state=SSL_ST_OK;
- }
- s->init_num=0;
- break;
-
- case SSL_ST_OK:
- /* clean a few things up */
- ssl3_cleanup_key_block(s);
-
- #if 0
- BUF_MEM_free(s->init_buf);
- s->init_buf=NULL;
- #endif
-
- /* remove buffering on output */
- ssl_free_wbio_buffer(s);
-
- s->init_num=0;
-
- if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */
- {
- s->renegotiate=0;
- s->new_session=0;
-
- ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
-
- s->ctx->stats.sess_accept_good++;
- /* s->server=1; */
- s->handshake_func=dtls1_accept;
-
- if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
- }
-
- ret = 1;
-
- /* done handshaking, next message is client hello */
- s->d1->handshake_read_seq = 0;
- /* next message is server hello */
- s->d1->handshake_write_seq = 0;
- s->d1->next_handshake_write_seq = 0;
- goto end;
- /* break; */
-
- default:
- OPENSSL_PUT_ERROR(SSL, dtls1_accept, SSL_R_UNKNOWN_STATE);
- ret= -1;
- goto end;
- /* break; */
- }
-
- 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_ACCEPT_LOOP,1);
- s->state=new_state;
- }
- }
- skip=0;
- }
- end:
- /* BIO_flush(s->wbio); */
-
- s->in_handshake--;
-
- if (cb != NULL)
- cb(s,SSL_CB_ACCEPT_EXIT,ret);
- return(ret);
- }
-
- int dtls1_send_hello_verify_request(SSL *s)
- {
- unsigned int msg_len;
- unsigned char *msg, *buf, *p;
-
- if (s->state == DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A)
- {
- buf = (unsigned char *)s->init_buf->data;
-
- msg = p = &(buf[DTLS1_HM_HEADER_LENGTH]);
- /* Always use DTLS 1.0 version: see RFC 6347 */
- *(p++) = DTLS1_VERSION >> 8;
- *(p++) = DTLS1_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)
- {
- OPENSSL_PUT_ERROR(SSL, dtls1_send_hello_verify_request, ERR_R_INTERNAL_ERROR);
- return 0;
- }
-
- *(p++) = (unsigned char) s->d1->cookie_len;
- memcpy(p, s->d1->cookie, s->d1->cookie_len);
- p += s->d1->cookie_len;
- msg_len = p - msg;
-
- dtls1_set_message_header(s, buf,
- DTLS1_MT_HELLO_VERIFY_REQUEST, msg_len, 0, msg_len);
-
- s->state=DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B;
- /* number of bytes to write */
- s->init_num=p-buf;
- s->init_off=0;
- }
-
- /* s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B */
- return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
- }
|