129 lines
3.4 KiB
C++
129 lines
3.4 KiB
C++
/**
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* @file HASHCrypt.hpp
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* @brief HASHCrypt class header
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* @author manzerbredes
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* @date 8 Mars 2015
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*
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* Contain all prototypes of HASHCrypt class.
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*
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*/
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#ifndef __HASHCrypt__
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#define __HASHCrypt__
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//----- std -----
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#include <iostream>
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#include <string>
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#include <sstream>
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//----- crypto++ -----
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#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1
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#include <crypto++/md5.h> //For MD5
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#include <crypto++/hex.h> //For Hex convertion
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#include <crypto++/sha.h> //For SHA
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/**
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* @class HASHCrypt HASHCrypt.hpp "/CryptClass/HASHCrypt.hpp"
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* @brief Hashing class
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* @author manzerbredes
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*
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* Class who handle hashing functions on a byte* parameter.
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* HASHCrypt try to detect errors and throw exceptions.
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* HASHCrypt use crypto++ library.
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*/
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class HASHCrypt{
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public:
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/**
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* @brief Contructor
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*/
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HASHCrypt();
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/**
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* @brief Destructor
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*/
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~HASHCrypt();
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/**
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* @brief Create an MD5 over 128 bits on a digest array of bytes.
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*
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* @param chain : Chain to hash
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* @param digest : An array of bytes (8 bits)
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* @param size : Length of the array digest
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*
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* **Warning** digest will be modified.
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* Digest must be an array of byte with 16 entries
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*/
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void getMD5_128(std::string chain, byte* digest, int size);
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/**
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* @brief Create an SHA over 256 bits on a digest array of bytes.
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*
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* @param chain : Chain to hash
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* @param digest : An array of bytes (8 bits)
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* @param size : Length of the array digest
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*
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* **Warning** digest will be modified.
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* Digest must be an array of byte with 32 entries
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*/
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void getSHA_256(std::string chain, byte* digest, int size); //Return SHA_256
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/**
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* @brief Convert digest to a string of HEX characters
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*
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* @param digest : An array of bytes (8 bits)
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* @param size : Length of the array digest
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*
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* @return a string of hex digest equivalent
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*
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* Digest must be an array of byte with 16 entries
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*/
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std::string digestToString(byte* digest, int size); //Return a string of a digest
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/**
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* @brief Compare 2 digest
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*
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* @param digest1 : An array of bytes (8 bits)
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* @param digest2 : An array of bytes (8 bits)
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* @param size : Length of the array digest1 or digest2
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*
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* @return a boolean if digest1 equals to digest2
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*
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* **Warning** if sizeof(digest1) != sizeof(digest 2) : segmentation fault !
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* Compare the two digest.
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*/
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bool compareDigest(byte* digest1, byte* digest2, int size);
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private:
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/**
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* @brief Check the digest size
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*
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* @param sizeRequired : Digest size expected
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* @param size : Given digest size
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*
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* Throw an exception, and stop the programm if
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* sizeRequired != size
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* Use getInvalidDigestSizeError method.
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*/
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void checkDigestSize(int sizeRequired, int size);
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/**
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* @brief Make and error message.
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*
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* @param sizeRequired : Digest size expected
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* @param size : Given digest size
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*
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* @return a string correspond to the error message
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*
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* Construct an error message with sizeRequired and size.
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*/
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std::string getInvalidDigestSizeError(int sizeRequired, int size);
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};
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#endif
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