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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <svl/PasswordHelper.hxx>
#include <comphelper/hash.hxx>
#include <rtl/digest.h>
#include <memory>
using namespace com::sun::star;
void SvPasswordHelper::GetHashPasswordSHA256(uno::Sequence<sal_Int8>& rPassHash, OUString const& rPassword)
{
OString const tmp(OUStringToOString(rPassword, RTL_TEXTENCODING_UTF8));
::std::vector<unsigned char> const hash(::comphelper::Hash::calculateHash(
reinterpret_cast<unsigned char const*>(tmp.getStr()), tmp.getLength(),
::comphelper::HashType::SHA256));
rPassHash.realloc(hash.size());
::std::copy(hash.begin(), hash.end(), rPassHash.begin());
rtl_secureZeroMemory(const_cast<char *>(tmp.getStr()), tmp.getLength());
}
void SvPasswordHelper::GetHashPasswordSHA1UTF8(uno::Sequence<sal_Int8>& rPassHash, OUString const& rPassword)
{
OString const tmp(OUStringToOString(rPassword, RTL_TEXTENCODING_UTF8));
::std::vector<unsigned char> const hash(::comphelper::Hash::calculateHash(
reinterpret_cast<unsigned char const*>(tmp.getStr()), tmp.getLength(),
::comphelper::HashType::SHA1));
rPassHash.realloc(hash.size());
::std::copy(hash.begin(), hash.end(), rPassHash.begin());
rtl_secureZeroMemory(const_cast<char *>(tmp.getStr()), tmp.getLength());
}
void SvPasswordHelper::GetHashPassword(uno::Sequence<sal_Int8>& rPassHash, const char* pPass, sal_uInt32 nLen)
{
rPassHash.realloc(RTL_DIGEST_LENGTH_SHA1);
rtlDigestError aError = rtl_digest_SHA1 (pPass, nLen, reinterpret_cast<sal_uInt8*>(rPassHash.getArray()), rPassHash.getLength());
if (aError != rtl_Digest_E_None)
{
rPassHash.realloc(0);
}
}
void SvPasswordHelper::GetHashPasswordLittleEndian(uno::Sequence<sal_Int8>& rPassHash, const OUString& sPass)
{
sal_Int32 nSize(sPass.getLength());
std::unique_ptr<char[]> pCharBuffer(new char[nSize * sizeof(sal_Unicode)]);
for (sal_Int32 i = 0; i < nSize; ++i)
{
sal_Unicode ch(sPass[ i ]);
pCharBuffer[2 * i] = static_cast< char >(ch & 0xFF);
pCharBuffer[2 * i + 1] = static_cast< char >(ch >> 8);
}
GetHashPassword(rPassHash, pCharBuffer.get(), nSize * sizeof(sal_Unicode));
rtl_secureZeroMemory(pCharBuffer.get(), nSize * sizeof(sal_Unicode));
}
void SvPasswordHelper::GetHashPasswordBigEndian(uno::Sequence<sal_Int8>& rPassHash, const OUString& sPass)
{
sal_Int32 nSize(sPass.getLength());
std::unique_ptr<char[]> pCharBuffer(new char[nSize * sizeof(sal_Unicode)]);
for (sal_Int32 i = 0; i < nSize; ++i)
{
sal_Unicode ch(sPass[ i ]);
pCharBuffer[2 * i] = static_cast< char >(ch >> 8);
pCharBuffer[2 * i + 1] = static_cast< char >(ch & 0xFF);
}
GetHashPassword(rPassHash, pCharBuffer.get(), nSize * sizeof(sal_Unicode));
rtl_secureZeroMemory(pCharBuffer.get(), nSize * sizeof(sal_Unicode));
}
void SvPasswordHelper::GetHashPassword(uno::Sequence<sal_Int8>& rPassHash, const OUString& sPass)
{
GetHashPasswordLittleEndian(rPassHash, sPass);
}
bool SvPasswordHelper::CompareHashPassword(const uno::Sequence<sal_Int8>& rOldPassHash, const OUString& sNewPass)
{
bool bResult = false;
if (rOldPassHash.getLength() == RTL_DIGEST_LENGTH_SHA1)
{
uno::Sequence<sal_Int8> aNewPass(RTL_DIGEST_LENGTH_SHA1);
GetHashPasswordSHA1UTF8(aNewPass, sNewPass);
if (aNewPass == rOldPassHash)
{
bResult = true;
}
else
{
GetHashPasswordLittleEndian(aNewPass, sNewPass);
if (aNewPass == rOldPassHash)
bResult = true;
else
{
GetHashPasswordBigEndian(aNewPass, sNewPass);
bResult = (aNewPass == rOldPassHash);
}
}
}
else if (rOldPassHash.getLength() == 32)
{
uno::Sequence<sal_Int8> aNewPass;
GetHashPasswordSHA256(aNewPass, sNewPass);
bResult = aNewPass == rOldPassHash;
}
return bResult;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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