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/* ****************************************************************************
* eID Middleware Project.
* Copyright (C) 2008-2009 FedICT.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version
* 3.0 as published by the Free Software Foundation.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, see
* http://www.gnu.org/licenses/.
**************************************************************************** */
#include "Hash.h"
#include "MWException.h"
#include "eidErrors.h"
using namespace eIDMW;
CHash::CHash()
{
m_bInitialized = false;
}
unsigned long CHash::GetHashLength(tHashAlgo algo)
{
switch(algo)
{
case ALGO_MD5:
return 16;
case ALGO_SHA1:
return 20;
case ALGO_MD5_SHA1:
return 36;
case ALGO_SHA256:
return 32;
case ALGO_SHA384:
return 48;
case ALGO_SHA512:
return 64;
case ALGO_RIPEMD160:
return 20;
default:
throw CMWEXCEPTION(EIDMW_ERR_PARAM_BAD);
}
}
CByteArray CHash::Hash(tHashAlgo algo, const CByteArray & data)
{
return Hash(algo, data, 0, data.Size());
}
CByteArray CHash::Hash(tHashAlgo algo, const CByteArray & data,
unsigned long ulOffset, unsigned long ulLen)
{
Init(algo);
Update(data, ulOffset, ulLen);
return GetHash();
}
void CHash::Init(tHashAlgo algo)
{
switch(algo)
{
case ALGO_MD5:
md5_init(&m_md1);
break;
case ALGO_SHA1:
sha1_init(&m_md1);
break;
case ALGO_MD5_SHA1:
md5_init(&m_md1);
sha1_init(&m_md2);
break;
case ALGO_SHA256:
sha256_init(&m_md1);
break;
case ALGO_SHA384:
sha384_init(&m_md1);
break;
case ALGO_SHA512:
sha512_init(&m_md1);
break;
case ALGO_RIPEMD160:
rmd160_init(&m_md1);
break;
default:
throw CMWEXCEPTION(EIDMW_ERR_PARAM_BAD);
}
m_Algo = algo;
m_bInitialized = true;
}
void CHash::Update(const CByteArray & data)
{
Update(data, 0, data.Size());
}
void CHash::Update(const CByteArray & data, unsigned long ulOffset, unsigned long ulLen)
{
if (!m_bInitialized)
throw CMWEXCEPTION(EIDMW_ERR_PARAM_BAD);
if (ulLen != 0)
{
const unsigned char *pucData = data.GetBytes() + ulOffset;
switch(m_Algo)
{
case ALGO_MD5:
md5_process(&m_md1, pucData, ulLen);
break;
case ALGO_SHA1:
sha1_process(&m_md1, pucData, ulLen);
break;
case ALGO_MD5_SHA1:
md5_process(&m_md1, pucData, ulLen);
sha1_process(&m_md2, pucData, ulLen);
break;
case ALGO_SHA256:
sha256_process(&m_md1, pucData, ulLen);
break;
case ALGO_SHA384:
sha384_process(&m_md1, pucData, ulLen);
break;
case ALGO_SHA512:
sha512_process(&m_md1, pucData, ulLen);
break;
case ALGO_RIPEMD160:
rmd160_process(&m_md1, pucData, ulLen);
break;
default:
throw CMWEXCEPTION(EIDMW_ERR_PARAM_BAD);
}
}
}
CByteArray CHash::GetHash()
{
if (!m_bInitialized)
throw CMWEXCEPTION(EIDMW_ERR_PARAM_BAD);
m_bInitialized = false;
// hash result
unsigned char tucHash[64]; // make sure this is enough if other hashes are added!!!
switch(m_Algo)
{
case ALGO_MD5:
md5_done(&m_md1, tucHash);
break;
case ALGO_SHA1:
sha1_done(&m_md1, tucHash);
break;
case ALGO_MD5_SHA1:
md5_done(&m_md1, tucHash);
sha1_done(&m_md2, tucHash + 16);
break;
case ALGO_SHA256:
sha256_done(&m_md1, tucHash);
break;
case ALGO_SHA384:
sha384_done(&m_md1, tucHash);
break;
case ALGO_SHA512:
sha512_done(&m_md1, tucHash);
break;
case ALGO_RIPEMD160:
rmd160_done(&m_md1, tucHash);
break;
default:
throw CMWEXCEPTION(EIDMW_ERR_PARAM_BAD);
}
return CByteArray(tucHash, GetHashLength(m_Algo));
}
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