xmlsecurity/source/xmlsec/biginteger.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.
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   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 <biginteger.hxx>
  22
  23 #include <xmlsec-wrapper.h>
  24 #include <com/sun/star/uno/Sequence.hxx>
  25
  26 using namespace ::com::sun::star::uno ;
  27
  28 namespace xmlsecurity
  29 {
  30 Sequence< sal_Int8 > numericStringToBigInteger ( const OUString& numeral )
  31 {
  32     xmlChar* chNumeral ;
  33     const xmlSecByte* bnInteger ;
  34     xmlSecSize length ;
  35     xmlSecBn bn ;
  36
  37     OString onumeral = OUStringToOString( numeral , RTL_TEXTENCODING_ASCII_US ) ;
  38
  39     chNumeral = xmlStrndup( reinterpret_cast<const xmlChar*>(onumeral.getStr()), static_cast<int>(onumeral.getLength()) ) ;
  40
  41     if( xmlSecBnInitialize( &bn, 0 ) < 0 ) {
  42         xmlFree( chNumeral ) ;
  43         return Sequence< sal_Int8 >();
  44     }
  45
  46     if( xmlSecBnFromDecString( &bn, chNumeral ) < 0 ) {
  47         xmlFree( chNumeral ) ;
  48         xmlSecBnFinalize( &bn ) ;
  49         return Sequence< sal_Int8 >();
  50     }
  51
  52     xmlFree( chNumeral ) ;
  53
  54     length = xmlSecBnGetSize( &bn ) ;
  55     if( length <= 0 ) {
  56         xmlSecBnFinalize( &bn ) ;
  57         return Sequence< sal_Int8 >();
  58     }
  59
  60     bnInteger = xmlSecBnGetData( &bn ) ;
  61     if( bnInteger == nullptr ) {
  62         xmlSecBnFinalize( &bn ) ;
  63         return Sequence< sal_Int8 >();
  64     }
  65
  66     Sequence< sal_Int8 > integer( length ) ;
  67     for( xmlSecSize i = 0 ; i < length ; i ++ )
  68     {
  69         integer[i] = *( bnInteger + i ) ;
  70     }
  71
  72     xmlSecBnFinalize( &bn ) ;
  73     return integer ;
  74 }
  75
  76 OUString bigIntegerToNumericString ( const Sequence< sal_Int8 >& integer )
  77 {
  78     OUString aRet ;
  79
  80     if( integer.hasElements() ) {
  81         xmlSecBn bn ;
  82         xmlChar* chNumeral ;
  83
  84         if( xmlSecBnInitialize( &bn, 0 ) < 0 )
  85             return aRet ;
  86
  87         if( xmlSecBnSetData( &bn, reinterpret_cast<const unsigned char*>(integer.getConstArray()), integer.getLength() ) < 0 ) {
  88             xmlSecBnFinalize( &bn ) ;
  89             return aRet ;
  90         }
  91
  92         chNumeral = xmlSecBnToDecString( &bn ) ;
  93         if( chNumeral == nullptr ) {
  94             xmlSecBnFinalize( &bn ) ;
  95             return aRet ;
  96         }
  97
  98         aRet = OUString::createFromAscii( reinterpret_cast<char*>(chNumeral) ) ;
  99
 100         xmlSecBnFinalize( &bn ) ;
 101         xmlFree( chNumeral ) ;
 102     }
 103
 104     return aRet ;
 105 }
 106 }
 107
 108 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */