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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
/* ######################################################################
SHA{512,256}SumValue - Storage for a SHA-{512,256} hash.
SHA{512,256}Summation - SHA-{512,256} Secure Hash Algorithm.
This is a C++ interface to a set of SHA{512,256}Sum functions, that mirrors
the equivalent MD5 & SHA1 classes.
##################################################################### */
/*}}}*/
#ifndef APTPKG_SHA2_H
#define APTPKG_SHA2_H
#include <cstring>
#include "hashsum_template.h"
#include "sha2_internal.h"
#ifndef APT_10_CLEANER_HEADERS
#include <algorithm>
#include <string>
#include <stdint.h>
#endif
typedef HashSumValue<512> SHA512SumValue;
typedef HashSumValue<256> SHA256SumValue;
class SHA2SummationBase : public SummationImplementation
{
protected:
bool Done;
public:
bool Add(const unsigned char *inbuf, unsigned long long len) APT_OVERRIDE APT_NONNULL(2) = 0;
void Result();
};
class SHA256Summation : public SHA2SummationBase
{
SHA256_CTX ctx;
unsigned char Sum[32];
public:
bool Add(const unsigned char *inbuf, unsigned long long len) APT_OVERRIDE APT_NONNULL(2)
{
if (Done)
return false;
SHA256_Update(&ctx, inbuf, len);
return true;
};
using SummationImplementation::Add;
SHA256SumValue Result()
{
if (!Done) {
SHA256_Final(Sum, &ctx);
Done = true;
}
SHA256SumValue res;
res.Set(Sum);
return res;
};
SHA256Summation()
{
SHA256_Init(&ctx);
Done = false;
memset(&Sum, 0, sizeof(Sum));
};
};
class SHA512Summation : public SHA2SummationBase
{
SHA512_CTX ctx;
unsigned char Sum[64];
public:
bool Add(const unsigned char *inbuf, unsigned long long len) APT_OVERRIDE APT_NONNULL(2)
{
if (Done)
return false;
SHA512_Update(&ctx, inbuf, len);
return true;
};
using SummationImplementation::Add;
SHA512SumValue Result()
{
if (!Done) {
SHA512_Final(Sum, &ctx);
Done = true;
}
SHA512SumValue res;
res.Set(Sum);
return res;
};
SHA512Summation()
{
SHA512_Init(&ctx);
Done = false;
memset(&Sum, 0, sizeof(Sum));
};
};
#endif
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