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/*
* Cryptographic API. {{{
*
* SHA-512, as specified in
* http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/ /*}}}*/
#ifdef __GNUG__
#pragma implementation "apt-pkg/sha2.h"
#endif
#include <apt-pkg/sha2.h>
#include <apt-pkg/strutl.h>
SHA512Summation::SHA512Summation() /*{{{*/
{
SHA512_Init(&ctx);
Done = false;
}
/*}}}*/
SHA512SumValue SHA512Summation::Result() /*{{{*/
{
if (!Done) {
SHA512_Final(Sum, &ctx);
Done = true;
}
SHA512SumValue res;
res.Set(Sum);
return res;
}
/*}}}*/
bool SHA512Summation::Add(const unsigned char *inbuf,unsigned long len) /*{{{*/
{
if (Done)
return false;
SHA512_Update(&ctx, inbuf, len);
return true;
}
/*}}}*/
// SHA512Summation::AddFD - Add content of file into the checksum /*{{{*/
// ---------------------------------------------------------------------
/* */
bool SHA512Summation::AddFD(int Fd,unsigned long Size)
{
unsigned char Buf[64 * 64];
int Res = 0;
int ToEOF = (Size == 0);
while (Size != 0 || ToEOF)
{
unsigned n = sizeof(Buf);
if (!ToEOF) n = min(Size,(unsigned long)n);
Res = read(Fd,Buf,n);
if (Res < 0 || (!ToEOF && (unsigned) Res != n)) // error, or short read
return false;
if (ToEOF && Res == 0) // EOF
break;
Size -= Res;
Add(Buf,Res);
}
return true;
}
/*}}}*/
SHA256Summation::SHA256Summation() /*{{{*/
{
SHA256_Init(&ctx);
Done = false;
}
/*}}}*/
bool SHA256Summation::Add(const unsigned char *inbuf,unsigned long len) /*{{{*/
{
if (Done)
return false;
SHA256_Update(&ctx, inbuf, len);
return true;
}
/*}}}*/
SHA256SumValue SHA256Summation::Result() /*{{{*/
{
if (!Done) {
SHA256_Final(Sum, &ctx);
Done = true;
}
SHA256SumValue res;
res.Set(Sum);
return res;
}
/*}}}*/
// SHA256Summation::AddFD - Add content of file into the checksum /*{{{*/
// ---------------------------------------------------------------------
/* */
bool SHA256Summation::AddFD(int Fd,unsigned long Size)
{
unsigned char Buf[64 * 64];
int Res = 0;
int ToEOF = (Size == 0);
while (Size != 0 || ToEOF)
{
unsigned n = sizeof(Buf);
if (!ToEOF) n = min(Size,(unsigned long)n);
Res = read(Fd,Buf,n);
if (Res < 0 || (!ToEOF && (unsigned) Res != n)) // error, or short read
return false;
if (ToEOF && Res == 0) // EOF
break;
Size -= Res;
Add(Buf,Res);
}
return true;
}
/*}}}*/
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