tdf#118581 Correctly display issuer name in signature line

Move the xmlsec helper methods to comphelper so that we can use them in cui

Change-Id: If9b10cfff5f5abd6b16e48f043af7959edbb1142
Reviewed-on: https://gerrit.libreoffice.org/63198
Tested-by: Jenkins
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

2 files changed, 336 insertions, 0 deletions

diff --git a/comphelper/Library_comphelper.mk b/comphelper/Library_comphelper.mk
index 04b333db9af9..a5275f971be4 100644
--- a/comphelper/Library_comphelper.mk
+++ b/comphelper/Library_comphelper.mk
@@ -143,6 +143,7 @@ $(eval $(call gb_Library_add_exception_objects,comphelper,\
     comphelper/source/misc/types \
     comphelper/source/misc/weak \
     comphelper/source/misc/weakeventlistener \
+    comphelper/source/misc/xmlsechelper \
     comphelper/source/officeinstdir/officeinstallationdirectories \
     comphelper/source/processfactory/processfactory \
     comphelper/source/property/ChainablePropertySet \
diff --git a/comphelper/source/misc/xmlsechelper.cxx b/comphelper/source/misc/xmlsechelper.cxx
new file mode 100644
index 000000000000..84ccd203092f
--- /dev/null
+++ b/comphelper/source/misc/xmlsechelper.cxx
@@ -0,0 +1,335 @@
+/* -*- 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 <comphelper/xmlsechelper.hxx>
+
+#include <vcl/svapp.hxx>
+#include <vcl/fixed.hxx>
+#include <svl/solar.hrc>
+#include <unotools/syslocale.hxx>
+#include <rtl/ustring.h>
+#include <rtl/ustrbuf.h>
+#include <vector>
+
+using namespace std;
+
+namespace comphelper
+{
+namespace xmlsec
+{
+    OUString GetCertificateKind( const css::security::CertificateKind &rKind )
+    {
+        switch (rKind)
+        {
+            case css::security::CertificateKind_X509:
+                return OUString("X.509");
+            case css::security::CertificateKind_OPENPGP:
+                return OUString("OpenPGP");
+            default:
+                return OUString();
+        }
+    }
+
+    /*
+        Creates two strings based on the distinguished name which are displayed in the
+        certificate details view. The first string contains only the values of the attribute
+        and values pairs, which are separated by commas. All escape characters ('"') are
+        removed.
+        The second string is for the details view at the bottom. It shows the attribute/value
+        pairs on different lines. All escape characters ('"') are removed.
+    */
+    pair< OUString, OUString> GetDNForCertDetailsView( const OUString & rRawString)
+    {
+        vector< pair< OUString, OUString > > vecAttrValueOfDN = parseDN(rRawString);
+        OUStringBuffer s1, s2;
+        for (auto i = vecAttrValueOfDN.cbegin(); i < vecAttrValueOfDN.cend(); ++i)
+        {
+            if (i != vecAttrValueOfDN.cbegin())
+            {
+                s1.append(',');
+                s2.append('\n');
+            }
+            s1.append(i->second);
+            s2.append(i->first).append(" = ").append(i->second);
+        }
+        return make_pair(s1.makeStringAndClear(), s2.makeStringAndClear());
+    }
+
+/*
+    Whenever the attribute value contains special characters, such as '"' or ',' (without '')
+    then the value will be enclosed in double quotes by the respective Windows or NSS function
+    which we use to retrieve, for example, the subject name. If double quotes appear in the value then
+    they are escaped with a double quote. This function removes the escape characters.
+*/
+#ifdef _WIN32
+vector< pair< OUString, OUString> > parseDN(const OUString& rRawString)
+{
+        vector< pair<OUString, OUString> > retVal;
+        bool bInEscape = false;
+        bool bInValue = false;
+        bool bInType = true;
+        sal_Int32 nTypeNameStart = 0;
+        OUString sType;
+        OUStringBuffer sbufValue;
+        sal_Int32 length = rRawString.getLength();
+
+        for (sal_Int32 i = 0; i < length; i++)
+        {
+            sal_Unicode c = rRawString[i];
+
+            if (c == '=')
+            {
+                if (! bInValue)
+                {
+                    sType = rRawString.copy(nTypeNameStart, i - nTypeNameStart);
+                    sType = sType.trim();
+                    bInType = false;
+                }
+                else
+                {
+                    sbufValue.append(c);
+                }
+            }
+            else if (c == '"')
+            {
+                if (!bInEscape)
+                {
+                    //If this is the quote is the first of the couple which enclose the
+                    //whole value, because the value contains special characters
+                    //then we just drop it. That is, this character must be followed by
+                    //a character which is not '"'.
+                    if ( i + 1 < length && rRawString[i+1] == '"')
+                        bInEscape = true;
+                    else
+                        bInValue = !bInValue; //value is enclosed in " "
+                }
+                else
+                {
+                    //This quote is escaped by a preceding quote and therefore is
+                    //part of the value
+                    sbufValue.append(c);
+                    bInEscape = false;
+                }
+            }
+            else if (c == ',' || c == '+')
+            {
+                //The comma separate the attribute value pairs.
+                //If the comma is not part of a value (the value would then be enclosed in '"'),
+                //then we have reached the end of the value
+                if (!bInValue)
+                {
+                    OSL_ASSERT(!sType.isEmpty());
+                    retVal.push_back(make_pair(sType, sbufValue.makeStringAndClear()));
+                    sType.clear();
+                    //The next char is the start of the new type
+                    nTypeNameStart = i + 1;
+                    bInType = true;
+                }
+                else
+                {
+                    //The whole string is enclosed because it contains special characters.
+                    //The enclosing '"' are not part of certificate but will be added by
+                    //the function (Windows or NSS) which retrieves DN
+                    sbufValue.append(c);
+                }
+            }
+            else
+            {
+                if (!bInType)
+                    sbufValue.append(c);
+            }
+        }
+        if (sbufValue.getLength())
+        {
+            OSL_ASSERT(!sType.isEmpty());
+            retVal.push_back(make_pair(sType, sbufValue.makeStringAndClear()));
+        }
+        return retVal;
+    }
+#else
+vector< pair< OUString, OUString> > parseDN(const OUString& rRawString)
+    {
+        vector< pair<OUString, OUString> > retVal;
+        //bInEscape == true means that the preceding character is an escape character
+        bool bInEscape = false;
+        bool bInValue = false;
+        bool bInType = true;
+        sal_Int32 nTypeNameStart = 0;
+        OUString sType;
+        OUStringBuffer sbufValue;
+        sal_Int32 length = rRawString.getLength();
+
+        for (sal_Int32 i = 0; i < length; i++)
+        {
+            sal_Unicode c = rRawString[i];
+
+            if (c == '=')
+            {
+                if (! bInValue)
+                {
+                    sType = rRawString.copy(nTypeNameStart, i - nTypeNameStart);
+                    sType = sType.trim();
+                    bInType = false;
+                }
+                else
+                {
+                    sbufValue.append(c);
+                }
+            }
+            else if (c == '\\')
+            {
+                if (!bInEscape)
+                {
+                    bInEscape = true;
+                }
+                else
+                { // bInEscape is true
+                    sbufValue.append(c);
+                    bInEscape = false;
+                }
+            }
+            else if (c == '"')
+            {
+                //an unescaped '"' is either at the beginning or end of the value
+                if (!bInEscape)
+                {
+                    if ( !bInValue)
+                        bInValue = true;
+                    else if (bInValue)
+                        bInValue = false;
+                }
+                else
+                {
+                    //This quote is escaped by a preceding quote and therefore is
+                    //part of the value
+                    sbufValue.append(c);
+                    bInEscape = false;
+                }
+            }
+            else if (c == ',' || c == '+')
+            {
+                //The comma separate the attribute value pairs.
+                //If the comma is not part of a value (the value would then be enclosed in '"'),
+                //then we have reached the end of the value
+                if (!bInValue)
+                {
+                    OSL_ASSERT(!sType.isEmpty());
+                    retVal.emplace_back(sType, sbufValue.makeStringAndClear());
+                    sType.clear();
+                    //The next char is the start of the new type
+                    nTypeNameStart = i + 1;
+                    bInType = true;
+                }
+                else
+                {
+                    //The whole string is enclosed because it contains special characters.
+                    //The enclosing '"' are not part of certificate but will be added by
+                    //the function (Windows or NSS) which retrieves DN
+                    sbufValue.append(c);
+                }
+            }
+            else
+            {
+                if (!bInType)
+                {
+                    sbufValue.append(c);
+                    bInEscape = false;
+                }
+            }
+        }
+        if (!sbufValue.isEmpty())
+        {
+            OSL_ASSERT(!sType.isEmpty());
+            retVal.emplace_back(sType, sbufValue.makeStringAndClear());
+        }
+        return retVal;
+    }
+
+#endif
+
+    OUString GetContentPart( const OUString& _rRawString )
+    {
+        char const * aIDs[] = { "CN", "OU", "O", "E", nullptr };
+        bool shouldBeParsed = false;
+        int i = 0;
+        while ( aIDs[i] )
+        {
+            if (_rRawString.startsWith(OUString::createFromAscii(aIDs[i++])))
+            {
+                shouldBeParsed = true;
+                break;
+            }
+        }
+
+        if (!shouldBeParsed)
+            return _rRawString;
+
+        OUString retVal;
+        i = 0;
+        vector< pair< OUString, OUString > > vecAttrValueOfDN = parseDN(_rRawString);
+        while ( aIDs[i] )
+        {
+            OUString sPartId = OUString::createFromAscii( aIDs[i++] );
+            auto idn = std::find_if(vecAttrValueOfDN.cbegin(), vecAttrValueOfDN.cend(),
+                [&sPartId](const pair< OUString, OUString >& dn) { return dn.first == sPartId; });
+            if (idn != vecAttrValueOfDN.cend())
+                retVal = idn->second;
+            if (!retVal.isEmpty())
+                break;
+        }
+        return retVal;
+    }
+
+    OUString GetHexString( const css::uno::Sequence< sal_Int8 >& _rSeq, const char* _pSep, sal_uInt16 _nLineBreak )
+    {
+        const sal_Int8*         pSerNumSeq = _rSeq.getConstArray();
+        int                     nCnt = _rSeq.getLength();
+        OUStringBuffer          aStr;
+        const char              pHexDigs[ 17 ] = "0123456789ABCDEF";
+        char                    pBuffer[ 3 ] = "  ";
+        sal_uInt8                   nNum;
+        sal_uInt16                  nBreakStart = _nLineBreak? _nLineBreak : 1;
+        sal_uInt16                  nBreak = nBreakStart;
+        for( int i = 0 ; i < nCnt ; ++i )
+        {
+            nNum = sal_uInt8( pSerNumSeq[ i ] );
+
+            // exchange the buffer[0] and buffer[1], which make it consistent with Mozilla and Windows
+            pBuffer[ 1 ] = pHexDigs[ nNum & 0x0F ];
+            nNum >>= 4;
+            pBuffer[ 0 ] = pHexDigs[ nNum ];
+            aStr.appendAscii( pBuffer );
+
+            --nBreak;
+            if( nBreak )
+                aStr.appendAscii( _pSep );
+            else
+            {
+                nBreak = nBreakStart;
+                aStr.append( '\n' );
+            }
+        }
+
+        return aStr.makeStringAndClear();
+    }
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */