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/* $OpenBSD: d1_srvr.c,v 1.91 2017/10/12 15:52:50 jsing Exp $ */ |
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/* |
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* DTLS implementation written by Nagendra Modadugu |
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* (nagendra@cs.stanford.edu) for the OpenSSL project 2005. |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* openssl-core@OpenSSL.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). |
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* |
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*/ |
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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* All rights reserved. |
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* |
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* This package is an SSL implementation written |
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* by Eric Young (eay@cryptsoft.com). |
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* The implementation was written so as to conform with Netscapes SSL. |
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* |
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* This library is free for commercial and non-commercial use as long as |
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* the following conditions are aheared to. The following conditions |
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* apply to all code found in this distribution, be it the RC4, RSA, |
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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* included with this distribution is covered by the same copyright terms |
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* except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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* |
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* Copyright remains Eric Young's, and as such any Copyright notices in |
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* the code are not to be removed. |
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* If this package is used in a product, Eric Young should be given attribution |
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* as the author of the parts of the library used. |
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* This can be in the form of a textual message at program startup or |
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* in documentation (online or textual) provided with the package. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* "This product includes cryptographic software written by |
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* Eric Young (eay@cryptsoft.com)" |
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* The word 'cryptographic' can be left out if the rouines from the library |
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* being used are not cryptographic related :-). |
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* 4. If you include any Windows specific code (or a derivative thereof) from |
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* the apps directory (application code) you must include an acknowledgement: |
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* The licence and distribution terms for any publically available version or |
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* derivative of this code cannot be changed. i.e. this code cannot simply be |
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* copied and put under another distribution licence |
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* [including the GNU Public Licence.] |
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*/ |
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#include <stdio.h> |
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#include "ssl_locl.h" |
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#include <openssl/bn.h> |
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#include <openssl/buffer.h> |
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#include <openssl/dh.h> |
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#include <openssl/evp.h> |
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#include <openssl/md5.h> |
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#include <openssl/objects.h> |
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#include <openssl/x509.h> |
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static const SSL_METHOD_INTERNAL DTLSv1_server_method_internal_data = { |
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.version = DTLS1_VERSION, |
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.min_version = DTLS1_VERSION, |
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.max_version = DTLS1_VERSION, |
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.ssl_new = dtls1_new, |
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.ssl_clear = dtls1_clear, |
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.ssl_free = dtls1_free, |
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.ssl_accept = ssl3_accept, |
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.ssl_connect = ssl_undefined_function, |
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.ssl_read = ssl3_read, |
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.ssl_peek = ssl3_peek, |
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.ssl_write = ssl3_write, |
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.ssl_shutdown = dtls1_shutdown, |
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.ssl_pending = ssl3_pending, |
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.get_ssl_method = dtls1_get_server_method, |
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.get_timeout = dtls1_default_timeout, |
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.ssl_version = ssl_undefined_void_function, |
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.ssl_renegotiate = ssl3_renegotiate, |
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.ssl_renegotiate_check = ssl3_renegotiate_check, |
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.ssl_get_message = dtls1_get_message, |
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.ssl_read_bytes = dtls1_read_bytes, |
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.ssl_write_bytes = dtls1_write_app_data_bytes, |
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.ssl3_enc = &DTLSv1_enc_data, |
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}; |
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static const SSL_METHOD DTLSv1_server_method_data = { |
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.ssl_dispatch_alert = dtls1_dispatch_alert, |
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.num_ciphers = ssl3_num_ciphers, |
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.get_cipher = dtls1_get_cipher, |
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.get_cipher_by_char = ssl3_get_cipher_by_char, |
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.put_cipher_by_char = ssl3_put_cipher_by_char, |
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.internal = &DTLSv1_server_method_internal_data, |
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}; |
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const SSL_METHOD * |
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DTLSv1_server_method(void) |
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{ |
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return &DTLSv1_server_method_data; |
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} |
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const SSL_METHOD * |
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dtls1_get_server_method(int ver) |
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{ |
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✓✗ |
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if (ver == DTLS1_VERSION) |
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return (DTLSv1_server_method()); |
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return (NULL); |
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} |
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int |
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dtls1_send_hello_verify_request(SSL *s) |
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{ |
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CBB cbb, verify, cookie; |
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memset(&cbb, 0, sizeof(cbb)); |
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if (S3I(s)->hs.state == DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A) { |
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if (s->ctx->internal->app_gen_cookie_cb == NULL || |
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s->ctx->internal->app_gen_cookie_cb(s, D1I(s)->cookie, |
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&(D1I(s)->cookie_len)) == 0) { |
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SSLerror(s, ERR_R_INTERNAL_ERROR); |
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return 0; |
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} |
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if (!ssl3_handshake_msg_start_cbb(s, &cbb, &verify, |
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DTLS1_MT_HELLO_VERIFY_REQUEST)) |
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goto err; |
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if (!CBB_add_u16(&verify, s->version)) |
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goto err; |
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if (!CBB_add_u8_length_prefixed(&verify, &cookie)) |
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goto err; |
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if (!CBB_add_bytes(&cookie, D1I(s)->cookie, D1I(s)->cookie_len)) |
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goto err; |
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if (!ssl3_handshake_msg_finish_cbb(s, &cbb)) |
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goto err; |
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S3I(s)->hs.state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B; |
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} |
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/* S3I(s)->hs.state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B */ |
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return (ssl3_handshake_write(s)); |
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err: |
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CBB_cleanup(&cbb); |
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return (-1); |
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} |