/* * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved * Copyright (C) 2019 Cypress Semiconductor Corporation * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the "License"); you may * not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /** * \file aes_alt.h * \ version 1.0 * * \brief This file contains AES definitions and functions. * * The Advanced Encryption Standard (AES) specifies a FIPS-approved * cryptographic algorithm that can be used to protect electronic * data. * * The AES algorithm is a symmetric block cipher that can * encrypt and decrypt information. For more information, see * <em>FIPS Publication 197: Advanced Encryption Standard</em> and * <em>ISO/IEC 18033-2:2006: Information technology -- Security * techniques -- Encryption algorithms -- Part 2: Asymmetric * ciphers</em>. * * The AES-XTS block mode is standardized by NIST SP 800-38E * <https://nvlpubs.nist.gov/nistpubs/legacy/sp/nistspecialpublication800-38e.pdf> * and described in detail by IEEE P1619 * <https://ieeexplore.ieee.org/servlet/opac?punumber=4375278>. */ #ifndef AES_ALT_H #define AES_ALT_H #if defined(MBEDTLS_AES_ALT) // Regular implementation #define CY_CIPHER_MODE_CBC_ALT #include <cy_crypto_common.h> #include <cy_crypto_core_aes.h> #include "cy_syslib.h" #include "crypto_common.h" /** * \brief The AES context-type definition. */ typedef struct mbedtls_aes_context { cy_hw_crypto_t obj; cy_stc_crypto_aes_state_t aes_state; cy_stc_crypto_aes_buffers_t aes_buffers; } mbedtls_aes_context; #if defined(MBEDTLS_CIPHER_MODE_XTS) /** * \brief The AES XTS context-type definition. */ typedef struct mbedtls_aes_xts_context { mbedtls_aes_context crypt; /*!< The AES context to use for AES block encryption or decryption. */ mbedtls_aes_context tweak; /*!< The AES context used for tweak computation. */ } mbedtls_aes_xts_context; #endif /* MBEDTLS_CIPHER_MODE_XTS */ #endif /* MBEDTLS_AES_ALT */ #endif /* aes_alt.h */