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 <com/sun/star/uno/Sequence.hxx>
  24 #include <xmlsec/xmlsec.h>
  25 #include <xmlsec/bn.h>
  26
  27 #include <comphelper/sequence.hxx>
  28
  29 using namespace ::com::sun::star::uno ;
  30
  31 namespace xmlsecurity
  32 {
  33 Sequence< sal_Int8 > numericStringToBigInteger ( std::u16string_view numeral )
  34 {
  35     xmlChar* chNumeral ;
  36     const xmlSecByte* bnInteger ;
  37     xmlSecSize length ;
  38     xmlSecBn bn ;
  39
  40     OString onumeral = OUStringToOString( numeral , RTL_TEXTENCODING_ASCII_US ) ;
  41
  42     chNumeral = xmlStrndup( reinterpret_cast<const xmlChar*>(onumeral.getStr()), static_cast<int>(onumeral.getLength()) ) ;
  43
  44     if( xmlSecBnInitialize( &bn, 0 ) < 0 ) {
  45         xmlFree( chNumeral ) ;
  46         return Sequence< sal_Int8 >();
  47     }
  48
  49     if( xmlSecBnFromDecString( &bn, chNumeral ) < 0 ) {
  50         xmlFree( chNumeral ) ;
  51         xmlSecBnFinalize( &bn ) ;
  52         return Sequence< sal_Int8 >();
  53     }
  54
  55     xmlFree( chNumeral ) ;
  56
  57     length = xmlSecBnGetSize( &bn ) ;
  58     if( length <= 0 ) {
  59         xmlSecBnFinalize( &bn ) ;
  60         return Sequence< sal_Int8 >();
  61     }
  62
  63     bnInteger = xmlSecBnGetData( &bn ) ;
  64     if( bnInteger == nullptr ) {
  65         xmlSecBnFinalize( &bn ) ;
  66         return Sequence< sal_Int8 >();
  67     }
  68
  69     Sequence< sal_Int8 > integer = comphelper::arrayToSequence<sal_Int8>(bnInteger, length);
  70
  71     xmlSecBnFinalize( &bn ) ;
  72     return integer ;
  73 }
  74
  75 OUString bigIntegerToNumericString ( const Sequence< sal_Int8 >& integer )
  76 {
  77     OUString aRet ;
  78
  79     if( integer.hasElements() ) {
  80         xmlSecBn bn ;
  81         xmlChar* chNumeral ;
  82
  83         if( xmlSecBnInitialize( &bn, 0 ) < 0 )
  84             return aRet ;
  85
  86         if( xmlSecBnSetData( &bn, reinterpret_cast<const unsigned char*>(integer.getConstArray()), integer.getLength() ) < 0 ) {
  87             xmlSecBnFinalize( &bn ) ;
  88             return aRet ;
  89         }
  90
  91         chNumeral = xmlSecBnToDecString( &bn ) ;
  92         if( chNumeral == nullptr ) {
  93             xmlSecBnFinalize( &bn ) ;
  94             return aRet ;
  95         }
  96
  97         aRet = OUString::createFromAscii( reinterpret_cast<char*>(chNumeral) ) ;
  98
  99         xmlSecBnFinalize( &bn ) ;
 100         xmlFree( chNumeral ) ;
 101     }
 102
 103     return aRet ;
 104 }
 105 }
 106
 107 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */