xmlsecurity/source/xmlsec/biginteger.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
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   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 #include <comphelper/sequence.hxx>
  27
  28 using namespace ::com::sun::star::uno ;
  29
  30 namespace xmlsecurity
  31 {
  32 Sequence< sal_Int8 > numericStringToBigInteger ( std::u16string_view numeral )
  33 {
  34     xmlChar* chNumeral ;
  35     const xmlSecByte* bnInteger ;
  36     xmlSecSize length ;
  37     xmlSecBn bn ;
  38
  39     OString onumeral = OUStringToOString( numeral , RTL_TEXTENCODING_ASCII_US ) ;
  40
  41     chNumeral = xmlStrndup( reinterpret_cast<const xmlChar*>(onumeral.getStr()), static_cast<int>(onumeral.getLength()) ) ;
  42
  43     if( xmlSecBnInitialize( &bn, 0 ) < 0 ) {
  44         xmlFree( chNumeral ) ;
  45         return Sequence< sal_Int8 >();
  46     }
  47
  48     if( xmlSecBnFromDecString( &bn, chNumeral ) < 0 ) {
  49         xmlFree( chNumeral ) ;
  50         xmlSecBnFinalize( &bn ) ;
  51         return Sequence< sal_Int8 >();
  52     }
  53
  54     xmlFree( chNumeral ) ;
  55
  56     length = xmlSecBnGetSize( &bn ) ;
  57     if( length <= 0 ) {
  58         xmlSecBnFinalize( &bn ) ;
  59         return Sequence< sal_Int8 >();
  60     }
  61
  62     bnInteger = xmlSecBnGetData( &bn ) ;
  63     if( bnInteger == nullptr ) {
  64         xmlSecBnFinalize( &bn ) ;
  65         return Sequence< sal_Int8 >();
  66     }
  67
  68     Sequence< sal_Int8 > integer = comphelper::arrayToSequence<sal_Int8>(bnInteger, length);
  69
  70     xmlSecBnFinalize( &bn ) ;
  71     return integer ;
  72 }
  73
  74 OUString bigIntegerToNumericString ( const Sequence< sal_Int8 >& integer )
  75 {
  76     OUString aRet ;
  77
  78     if( integer.hasElements() ) {
  79         xmlSecBn bn ;
  80         xmlChar* chNumeral ;
  81
  82         if( xmlSecBnInitialize( &bn, 0 ) < 0 )
  83             return aRet ;
  84
  85         if( xmlSecBnSetData( &bn, reinterpret_cast<const unsigned char*>(integer.getConstArray()), integer.getLength() ) < 0 ) {
  86             xmlSecBnFinalize( &bn ) ;
  87             return aRet ;
  88         }
  89
  90         chNumeral = xmlSecBnToDecString( &bn ) ;
  91         if( chNumeral == nullptr ) {
  92             xmlSecBnFinalize( &bn ) ;
  93             return aRet ;
  94         }
  95
  96         aRet = OUString::createFromAscii( reinterpret_cast<char*>(chNumeral) ) ;
  97
  98         xmlSecBnFinalize( &bn ) ;
  99         xmlFree( chNumeral ) ;
 100     }
 101
 102     return aRet ;
 103 }
 104 }
 105
 106 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */