4 * \brief DTLS cookie callbacks implementation
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7 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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8 * SPDX-License-Identifier: Apache-2.0
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10 * Licensed under the Apache License, Version 2.0 (the "License"); you may
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11 * not use this file except in compliance with the License.
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12 * You may obtain a copy of the License at
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14 * http://www.apache.org/licenses/LICENSE-2.0
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16 * Unless required by applicable law or agreed to in writing, software
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17 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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18 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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19 * See the License for the specific language governing permissions and
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20 * limitations under the License.
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22 * This file is part of mbed TLS (https://tls.mbed.org)
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24 #ifndef MBEDTLS_SSL_COOKIE_H
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25 #define MBEDTLS_SSL_COOKIE_H
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27 #if !defined(MBEDTLS_CONFIG_FILE)
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30 #include MBEDTLS_CONFIG_FILE
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35 #if defined(MBEDTLS_THREADING_C)
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36 #include "threading.h"
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40 * \name SECTION: Module settings
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42 * The configuration options you can set for this module are in this section.
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43 * Either change them in config.h or define them on the compiler command line.
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46 #ifndef MBEDTLS_SSL_COOKIE_TIMEOUT
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47 #define MBEDTLS_SSL_COOKIE_TIMEOUT 60 /**< Default expiration delay of DTLS cookies, in seconds if HAVE_TIME, or in number of cookies issued */
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50 /* \} name SECTION: Module settings */
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57 * \brief Context for the default cookie functions.
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59 typedef struct mbedtls_ssl_cookie_ctx
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61 mbedtls_md_context_t hmac_ctx; /*!< context for the HMAC portion */
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62 #if !defined(MBEDTLS_HAVE_TIME)
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63 unsigned long serial; /*!< serial number for expiration */
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65 unsigned long timeout; /*!< timeout delay, in seconds if HAVE_TIME,
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66 or in number of tickets issued */
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68 #if defined(MBEDTLS_THREADING_C)
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69 mbedtls_threading_mutex_t mutex;
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71 } mbedtls_ssl_cookie_ctx;
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74 * \brief Initialize cookie context
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76 void mbedtls_ssl_cookie_init( mbedtls_ssl_cookie_ctx *ctx );
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79 * \brief Setup cookie context (generate keys)
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81 int mbedtls_ssl_cookie_setup( mbedtls_ssl_cookie_ctx *ctx,
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82 int (*f_rng)(void *, unsigned char *, size_t),
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86 * \brief Set expiration delay for cookies
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87 * (Default MBEDTLS_SSL_COOKIE_TIMEOUT)
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89 * \param ctx Cookie contex
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90 * \param delay Delay, in seconds if HAVE_TIME, or in number of cookies
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91 * issued in the meantime.
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92 * 0 to disable expiration (NOT recommended)
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94 void mbedtls_ssl_cookie_set_timeout( mbedtls_ssl_cookie_ctx *ctx, unsigned long delay );
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97 * \brief Free cookie context
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99 void mbedtls_ssl_cookie_free( mbedtls_ssl_cookie_ctx *ctx );
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102 * \brief Generate cookie, see \c mbedtls_ssl_cookie_write_t
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104 mbedtls_ssl_cookie_write_t mbedtls_ssl_cookie_write;
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107 * \brief Verify cookie, see \c mbedtls_ssl_cookie_write_t
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109 mbedtls_ssl_cookie_check_t mbedtls_ssl_cookie_check;
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115 #endif /* ssl_cookie.h */
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