/* * hashlib++ - a simple hash library for C++ * * Copyright (c) 2007-2010 Benjamin Grüdelbach * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1) Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2) Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ //---------------------------------------------------------------------- /* * The hashlib++ SHA256 implementation is derivative from the sourcecode * published by Aaron D. Gifford * * Copyright (c) 2000-2001, Aaron D. Gifford * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the copyright holder nor the names of contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTOR(S) ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTOR(S) BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ //---------------------------------------------------------------------- /** * @file hl_sha256.h * @brief This file contains the declaration of the SHA256 class * @date Di 25 Sep 2007 */ //---------------------------------------------------------------------- //include protection #ifndef SHA256_H #define SHA256_H //---------------------------------------------------------------------- //lenght defines #define SHA256_BLOCK_LENGTH 64 #define SHA256_SHORT_BLOCK_LENGTH (SHA256_BLOCK_LENGTH - 8) #define SHA256_DIGEST_LENGTH 32 #define SHA256_DIGEST_STRING_LENGTH (SHA256_DIGEST_LENGTH * 2 + 1) //---------------------------------------------------------------------- //hl includes #include "hl_types.h" //---------------------------------------------------------------------- //typedefs /** * Exactly 1 byte */ typedef hl_uint8 sha2_byte; /** * Exactly 4 bytes */ typedef hl_uint32 sha2_word32; /** * Exactly 8 bytes */ typedef hl_uint64 sha2_word64; /** * @brief This struct represents a SHA256-hash context */ typedef struct HL_SHA256_CTX { /** * state */ hl_uint32 state[8]; /** * bitcount */ hl_uint64 bitcount; /** * message buffer */ hl_uint8 buffer[SHA256_BLOCK_LENGTH]; } HL_SHA256_CTX; //---------------------------------------------------------------------- /** * @brief This class represents the implementation of * the sha256 algorithm. * * Basically the class provides three public member-functions * to create a hash: SHA256_Init(), SHA256_Update() and SHA256_End(). * If you want to create a hash based on a string or file quickly * you should use the sha256wrapper class instead of SHA256. */ class SHA256 { private: /** * @brief Finalize the sha256 operation * @param digest The digest to finalize the operation with. * @param context The context to finalize. */ void SHA256_Final(hl_uint8 digest[SHA256_DIGEST_LENGTH], HL_SHA256_CTX* context); /** * @brief Internal data transformation * @param context The context to use * @param data The data to transform */ void SHA256_Transform(HL_SHA256_CTX* context, const sha2_word32* data); public: /** * @brief Initialize the context * @param context The context to init. */ void SHA256_Init(HL_SHA256_CTX *context); /** * @brief Updates the context * @param context The context to update. * @param data The data for updating the context. * @param len The length of the given data. */ void SHA256_Update(HL_SHA256_CTX* context, const hl_uint8* data, unsigned int len); /** * @brief Ends the sha256 operation and return the * created hash in the given buffer. * @param context The context to end. * @param buffer This OUT-Parameter contains the created * hash after ending the operation. */ char* SHA256_End(HL_SHA256_CTX* context, char buffer[SHA256_DIGEST_STRING_LENGTH]); }; //---------------------------------------------------------------------- //end of include protection #endif //---------------------------------------------------------------------- //EOF