1 /* 2 * Copyright (c) 2016, The OpenThread Authors. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. Neither the name of the copyright holder nor the 13 * names of its contributors may be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /** 30 * @file 31 * This file includes definitions for performing AES-ECB computations. 32 */ 33 34 #ifndef AES_ECB_HPP_ 35 #define AES_ECB_HPP_ 36 37 #include "openthread-core-config.h" 38 39 #include <openthread/platform/crypto.h> 40 41 #include "common/code_utils.hpp" 42 #include "crypto/context_size.hpp" 43 #include "crypto/storage.hpp" 44 45 namespace ot { 46 namespace Crypto { 47 48 /** 49 * @addtogroup core-security 50 * 51 * @{ 52 */ 53 54 /** 55 * Implements AES ECB computation. 56 */ 57 class AesEcb 58 { 59 public: 60 static constexpr uint8_t kBlockSize = 16; ///< AES-128 block size (bytes). 61 62 /** 63 * Constructor to initialize the AES operation. 64 */ 65 AesEcb(void); 66 67 /** 68 * Destructor to free the AES context. 69 */ 70 ~AesEcb(void); 71 72 /** 73 * Sets the key. 74 * 75 * @param[in] aKey Crypto Key used for ECB operation 76 */ 77 void SetKey(const Key &aKey); 78 79 /** 80 * Encrypts data. 81 * 82 * @param[in] aInput A pointer to the input buffer. 83 * @param[out] aOutput A pointer to the output buffer. 84 */ 85 void Encrypt(const uint8_t aInput[kBlockSize], uint8_t aOutput[kBlockSize]); 86 87 private: 88 otCryptoContext mContext; 89 OT_DEFINE_ALIGNED_VAR(mContextStorage, kAesContextSize, uint64_t); 90 }; 91 92 /** 93 * @} 94 */ 95 96 } // namespace Crypto 97 } // namespace ot 98 99 #endif // AES_ECB_HPP_ 100