svl/source/misc/PasswordHelper.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20
  21 #include <svl/PasswordHelper.hxx>
  22 #include <rtl/digest.h>
  23 #include <boost/scoped_array.hpp>
  24
  25 using namespace com::sun::star;
  26
  27 void SvPasswordHelper::GetHashPassword(uno::Sequence<sal_Int8>& rPassHash, const sal_Char* pPass, sal_uInt32 nLen)
  28 {
  29     rPassHash.realloc(RTL_DIGEST_LENGTH_SHA1);
  30
  31     rtlDigestError aError = rtl_digest_SHA1 (pPass, nLen, reinterpret_cast<sal_uInt8*>(rPassHash.getArray()), rPassHash.getLength());
  32     if (aError != rtl_Digest_E_None)
  33     {
  34         rPassHash.realloc(0);
  35     }
  36 }
  37
  38 void SvPasswordHelper::GetHashPasswordLittleEndian(uno::Sequence<sal_Int8>& rPassHash, const OUString& sPass)
  39 {
  40     sal_Int32 nSize(sPass.getLength());
  41     boost::scoped_array<sal_Char> pCharBuffer(new sal_Char[nSize * sizeof(sal_Unicode)]);
  42
  43     for (sal_Int32 i = 0; i < nSize; ++i)
  44     {
  45         sal_Unicode ch(sPass[ i ]);
  46         pCharBuffer[2 * i] = static_cast< sal_Char >(ch & 0xFF);
  47         pCharBuffer[2 * i + 1] = static_cast< sal_Char >(ch >> 8);
  48     }
  49
  50     GetHashPassword(rPassHash, pCharBuffer.get(), nSize * sizeof(sal_Unicode));
  51 }
  52
  53 void SvPasswordHelper::GetHashPasswordBigEndian(uno::Sequence<sal_Int8>& rPassHash, const OUString& sPass)
  54 {
  55     sal_Int32 nSize(sPass.getLength());
  56     boost::scoped_array<sal_Char> pCharBuffer(new sal_Char[nSize * sizeof(sal_Unicode)]);
  57
  58     for (sal_Int32 i = 0; i < nSize; ++i)
  59     {
  60         sal_Unicode ch(sPass[ i ]);
  61         pCharBuffer[2 * i] = static_cast< sal_Char >(ch >> 8);
  62         pCharBuffer[2 * i + 1] = static_cast< sal_Char >(ch & 0xFF);
  63     }
  64
  65     GetHashPassword(rPassHash, pCharBuffer.get(), nSize * sizeof(sal_Unicode));
  66 }
  67
  68 void SvPasswordHelper::GetHashPassword(uno::Sequence<sal_Int8>& rPassHash, const OUString& sPass)
  69 {
  70     GetHashPasswordLittleEndian(rPassHash, sPass);
  71 }
  72
  73 bool SvPasswordHelper::CompareHashPassword(const uno::Sequence<sal_Int8>& rOldPassHash, const OUString& sNewPass)
  74 {
  75     bool bResult = false;
  76
  77     uno::Sequence<sal_Int8> aNewPass(RTL_DIGEST_LENGTH_SHA1);
  78     GetHashPasswordLittleEndian(aNewPass, sNewPass);
  79     if (aNewPass == rOldPassHash)
  80         bResult = true;
  81     else
  82     {
  83         GetHashPasswordBigEndian(aNewPass, sNewPass);
  84         bResult = (aNewPass == rOldPassHash);
  85     }
  86
  87     return bResult;
  88 }
  89
  90 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */