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// -*- 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 <cstring>
#include <algorithm>
#include <stdint.h>
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
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