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87 lines
3.0 KiB
C
87 lines
3.0 KiB
C
/**
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* \file ccm.h
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*
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* \brief This file provides an API for the CCM authenticated encryption
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* mode for block ciphers.
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*
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* CCM combines Counter mode encryption with CBC-MAC authentication
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* for 128-bit block ciphers.
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*
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* Input to CCM includes the following elements:
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* <ul><li>Payload - data that is both authenticated and encrypted.</li>
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* <li>Associated data (Adata) - data that is authenticated but not
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* encrypted, For example, a header.</li>
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* <li>Nonce - A unique value that is assigned to the payload and the
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* associated data.</li></ul>
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*
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* Definition of CCM:
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* http://csrc.nist.gov/publications/nistpubs/800-38C/SP800-38C_updated-July20_2007.pdf
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* RFC 3610 "Counter with CBC-MAC (CCM)"
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*
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* Related:
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* RFC 5116 "An Interface and Algorithms for Authenticated Encryption"
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*
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* Definition of CCM*:
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* IEEE 802.15.4 - IEEE Standard for Local and metropolitan area networks
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* Integer representation is fixed most-significant-octet-first order and
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* the representation of octets is most-significant-bit-first order. This is
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* consistent with RFC 3610.
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*/
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/*
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* Copyright (C) 2006-2018, Arm Limited (or its affiliates), All Rights Reserved
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* Copyright (C) 2019-2020 STMicroelectronics, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file implements ST CCM HW services based on API from mbed TLS
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*/
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/* Define to prevent recursive inclusion -------------------------------------*/
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#ifndef MBEDTLS_CCM_ALT_H
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#define MBEDTLS_CCM_ALT_H
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#if defined(MBEDTLS_CCM_ALT)
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/* Includes ------------------------------------------------------------------*/
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#include "cryp_stm32.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Exported types ------------------------------------------------------------*/
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/**
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* \brief The CCM context-type definition. The CCM context is passed
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* to the APIs called.
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*/
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typedef struct mbedtls_ccm_context {
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/* Encryption/Decryption key */
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uint32_t ccm_key[8];
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CRYP_HandleTypeDef hcryp_ccm; /* CCM context */
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uint32_t ctx_save_cr; /* save context for multi-context */
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}
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mbedtls_ccm_context;
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/* Exported constants --------------------------------------------------------*/
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/* Exported macro ------------------------------------------------------------*/
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/* Exported functions --------------------------------------------------------*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* MBEDTLS_CCM_ALT */
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#endif /* MBEDTLS_CCM_ALT_H */
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