?? sha.h
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#ifndef CRYPTOPP_SHA_H#define CRYPTOPP_SHA_H#include "iterhash.h"NAMESPACE_BEGIN(CryptoPP)/// <a href="http://www.weidai.com/scan-mirror/md.html#SHA-1">SHA-1</a>class SHA : public IteratedHashWithStaticTransform<word32, BigEndian, 64, SHA>{public: enum {DIGESTSIZE = 20}; SHA() : IteratedHashWithStaticTransform<word32, BigEndian, 64, SHA>(DIGESTSIZE) {Init();} static void Transform(word32 *digest, const word32 *data); static const char *StaticAlgorithmName() {return "SHA-1";}protected: void Init();};typedef SHA SHA1;//! implements the SHA-256 standardclass SHA256 : public IteratedHashWithStaticTransform<word32, BigEndian, 64, SHA256>{public: enum {DIGESTSIZE = 32}; SHA256() : IteratedHashWithStaticTransform<word32, BigEndian, 64, SHA256>(DIGESTSIZE) {Init();} static void Transform(word32 *digest, const word32 *data); static const char *StaticAlgorithmName() {return "SHA-256";}protected: void Init(); static const word32 K[64];};#ifdef WORD64_AVAILABLE//! implements the SHA-512 standardclass SHA512 : public IteratedHashWithStaticTransform<word64, BigEndian, 128, SHA512>{public: enum {DIGESTSIZE = 64}; SHA512() : IteratedHashWithStaticTransform<word64, BigEndian, 128, SHA512>(DIGESTSIZE) {Init();} static void Transform(word64 *digest, const word64 *data); static const char *StaticAlgorithmName() {return "SHA-512";}protected: void Init(); static const word64 K[80];};//! implements the SHA-384 standardclass SHA384 : public IteratedHashWithStaticTransform<word64, BigEndian, 128, SHA512>{public: enum {DIGESTSIZE = 48}; SHA384() : IteratedHashWithStaticTransform<word64, BigEndian, 128, SHA512>(64) {Init();} unsigned int DigestSize() const {return DIGESTSIZE;}; static const char *StaticAlgorithmName() {return "SHA-384";}protected: void Init();};#endifNAMESPACE_END#endif
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