aguerreiro

// -*- mode: cpp; mode: fold -*-// Description                                                          /*{{{*/// $Id: sha1.h,v 1.3 2001/05/07 05:05:47 jgg Exp $/* ######################################################################   SHA256SumValue - Storage for a SHA-256 hash.   SHA256Summation - SHA-256 Secure Hash Algorithm.      This is a C++ interface to a set of SHA256Sum functions, that mirrors   the equivalent MD5 & SHA1 classes.    ##################################################################### */                                                                        /*}}}*/#ifndef APTPKG_SHA256_H#define APTPKG_SHA256_H#include <string>#include <inttypes.h>#include <cstring>#include <algorithm>using std::string;using std::min;class SHA256Summation;class SHA256SumValue{   friend class SHA256Summation;   unsigned char Sum[32];      public:   // Accessors   bool operator ==(const SHA256SumValue &rhs) const;    string Value() const;   inline void Value(unsigned char S[32])         {for (int I = 0; I != sizeof(Sum); I++) S[I] = Sum[I];};   inline operator string() const {return Value();};   bool Set(string Str);   inline void Set(unsigned char S[32])          {for (int I = 0; I != sizeof(Sum); I++) Sum[I] = S[I];};   SHA256SumValue(string Str);   SHA256SumValue();};struct sha256_ctx {    uint32_t count[2];    uint32_t state[8];    uint8_t buf[128];};class SHA256Summation{   struct sha256_ctx Sum;   bool Done;   public:   bool Add(const unsigned char *inbuf,unsigned long inlen);   inline bool Add(const char *Data) {return Add((unsigned char *)Data,strlen(Data));};   bool AddFD(int Fd,unsigned long Size);   inline bool Add(const unsigned char *Beg,const unsigned char *End)                   {return Add(Beg,End-Beg);};   SHA256SumValue Result();      SHA256Summation();};#endif