1 files changed, 106 insertions, 0 deletions
diff --git a/xmlsecurity/source/xmlsec/biginteger.cxx b/xmlsecurity/source/xmlsec/biginteger.cxx
new file mode 100644
index 000000000..1a4ab6fd9
--- /dev/null
+++ b/xmlsecurity/source/xmlsec/biginteger.cxx
@@ -0,0 +1,106 @@
+/* -*- 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 <biginteger.hxx>
+
+#include <xmlsec-wrapper.h>
+#include <com/sun/star/uno/Sequence.hxx>
+
+#include <comphelper/sequence.hxx>
+
+using namespace ::com::sun::star::uno ;
+
+namespace xmlsecurity
+{
+Sequence< sal_Int8 > numericStringToBigInteger ( std::u16string_view numeral )
+{
+    xmlChar* chNumeral ;
+    const xmlSecByte* bnInteger ;
+    xmlSecSize length ;
+    xmlSecBn bn ;
+
+    OString onumeral = OUStringToOString( numeral , RTL_TEXTENCODING_ASCII_US ) ;
+
+    chNumeral = xmlStrndup( reinterpret_cast<const xmlChar*>(onumeral.getStr()), static_cast<int>(onumeral.getLength()) ) ;
+
+    if( xmlSecBnInitialize( &bn, 0 ) < 0 ) {
+        xmlFree( chNumeral ) ;
+        return Sequence< sal_Int8 >();
+    }
+
+    if( xmlSecBnFromDecString( &bn, chNumeral ) < 0 ) {
+        xmlFree( chNumeral ) ;
+        xmlSecBnFinalize( &bn ) ;
+        return Sequence< sal_Int8 >();
+    }
+
+    xmlFree( chNumeral ) ;
+
+    length = xmlSecBnGetSize( &bn ) ;
+    if( length <= 0 ) {
+        xmlSecBnFinalize( &bn ) ;
+        return Sequence< sal_Int8 >();
+    }
+
+    bnInteger = xmlSecBnGetData( &bn ) ;
+    if( bnInteger == nullptr ) {
+        xmlSecBnFinalize( &bn ) ;
+        return Sequence< sal_Int8 >();
+    }
+
+    Sequence< sal_Int8 > integer = comphelper::arrayToSequence<sal_Int8>(bnInteger, length);
+
+    xmlSecBnFinalize( &bn ) ;
+    return integer ;
+}
+
+OUString bigIntegerToNumericString ( const Sequence< sal_Int8 >& integer )
+{
+    OUString aRet ;
+
+    if( integer.hasElements() ) {
+        xmlSecBn bn ;
+        xmlChar* chNumeral ;
+
+        if( xmlSecBnInitialize( &bn, 0 ) < 0 )
+            return aRet ;
+
+        if( xmlSecBnSetData( &bn, reinterpret_cast<const unsigned char*>(integer.getConstArray()), integer.getLength() ) < 0 ) {
+            xmlSecBnFinalize( &bn ) ;
+            return aRet ;
+        }
+
+        chNumeral = xmlSecBnToDecString( &bn ) ;
+        if( chNumeral == nullptr ) {
+            xmlSecBnFinalize( &bn ) ;
+            return aRet ;
+        }
+
+        aRet = OUString::createFromAscii( reinterpret_cast<char*>(chNumeral) ) ;
+
+        xmlSecBnFinalize( &bn ) ;
+        xmlFree( chNumeral ) ;
+    }
+
+    return aRet ;
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */