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diff --git a/certmanager/hierarchyanalyser.cpp b/certmanager/hierarchyanalyser.cpp
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+++ b/certmanager/hierarchyanalyser.cpp
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+/*
+    hierarchyanalyser.cpp
+
+    This file is part of Kleopatra, the KDE keymanager
+    Copyright (c) 2004 Klarälvdalens Datakonsult AB
+
+    Kleopatra is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    Kleopatra is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of this program with any edition of
+    the Qt library by Trolltech AS, Norway (or with modified versions
+    of Qt that use the same license as Qt), and distribute linked
+    combinations including the two.  You must obey the GNU General
+    Public License in all respects for all of the code used other than
+    Qt.  If you modify this file, you may extend this exception to
+    your version of the file, but you are not obligated to do so.  If
+    you do not wish to do so, delete this exception statement from
+    your version.
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "hierarchyanalyser.h"
+
+#include <algorithm>
+#include <iterator>
+
+HierarchyAnalyser::HierarchyAnalyser( QObject * parent, const char * name )
+  : QObject( parent, name )
+{
+
+}
+
+HierarchyAnalyser::~HierarchyAnalyser() {
+  
+}
+
+void HierarchyAnalyser::slotNextKey( const GpgME::Key & key ) {
+  if ( key.isNull() )
+    return;
+  if ( key.isRoot() || !key.chainID() || !*key.chainID() )
+    // root keys have themselves as issuer - we don't want them to
+    // have parents, though:
+    mSubjectsByIssuer[0].push_back( key );
+  else
+    mSubjectsByIssuer[key.chainID()].push_back( key );
+}
+
+const std::vector<GpgME::Key> & HierarchyAnalyser::subjectsForIssuer( const char * issuer_dn ) const {
+  static const std::vector<GpgME::Key> empty;
+  std::map< QCString, std::vector<GpgME::Key> >::const_iterator it =
+    mSubjectsByIssuer.find( issuer_dn );
+  return it == mSubjectsByIssuer.end() ? empty : it->second ;
+}
+
+std::vector<GpgME::Key> HierarchyAnalyser::subjectsForIssuerRecursive( const char * issuer_dn ) const {
+  std::vector<GpgME::Key> keys = subjectsForIssuer( issuer_dn );
+  for ( unsigned int i = 0 ; i < keys.size() ; ++i ) // can't use iterators here, since appending would invalidate them
+    if ( const char * fpr = keys[i].primaryFingerprint() ) {
+      const std::vector<GpgME::Key> & tmp = subjectsForIssuer( fpr );
+      std::copy( tmp.begin(), tmp.end(), std::back_inserter( keys ) );
+    }
+  return keys;
+}
+
+
+#include "hierarchyanalyser.moc"