/* * SHA-{224,256} * (C) 1999-2008 Jack Lloyd * 2007 FlexSecure GmbH * * Distributed under the terms of the Botan license */ #ifndef BOTAN_SHA_256_H__ #define BOTAN_SHA_256_H__ #include <botan/mdx_hash.h> namespace Botan { /* * SHA-{224,256} Base */ class BOTAN_DLL SHA_224_256_BASE : public MDx_HashFunction { protected: void clear() throw(); SHA_224_256_BASE(u32bit out) : MDx_HashFunction(out, 64, true, true) { clear(); } SecureBuffer<u32bit, 64> W; SecureBuffer<u32bit, 8> digest; private: void compress_n(const byte[], u32bit blocks); void copy_out(byte[]); }; /* * SHA-224 */ class BOTAN_DLL SHA_224 : public SHA_224_256_BASE { public: void clear() throw(); std::string name() const { return "SHA-224"; } HashFunction* clone() const { return new SHA_224; } SHA_224() : SHA_224_256_BASE(28) { clear(); } }; /* * SHA-256 */ class BOTAN_DLL SHA_256 : public SHA_224_256_BASE { public: void clear() throw(); std::string name() const { return "SHA-256"; } HashFunction* clone() const { return new SHA_256; } SHA_256() : SHA_224_256_BASE(32) { clear (); } }; } #endif