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diff --git a/lib/compatibility/knewstuff/security.h b/lib/compatibility/knewstuff/security.h
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+/***************************************************************************
+                          security.h  -  description
+                             -------------------
+    begin                : Thu Jun 24 11:22:12 2004
+    copyright          : (C) 2004, 2005 by Andras Mantia <amantia@kde.org>
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU Library General Public License as       *
+ *   published by the Free Software Foundation; version 2 of the License.  *
+ *                                                                         *
+ ***************************************************************************/
+
+
+#ifndef SECURITY_H
+#define SECURITY_H
+
+//qt includes
+#include <qmap.h>
+#include <qobject.h>
+
+class KProcIO;
+class KProcess;
+
+struct KeyStruct {
+   QString id;
+   QString name;
+   QString mail;
+   bool trusted;
+   bool secret;
+};
+
+/**
+Handles security releated issues, like signing, verifying.
+It is a private class, not meant to be used by third party applications.
+
+@author Andras Mantia <amantia@kde.org>
+*/
+
+namespace KNS {
+
+class Security : public QObject
+{
+Q_OBJECT
+public:
+  static Security* const ref()
+  {
+    static Security *m_ref;
+    if (!m_ref) m_ref = new Security();
+    return m_ref;
+  }
+  ~Security();
+
+
+  /** Verifies the integrity and the signature of a tarball file.
+   * @param fileName the file to be verified. It should be a tar.gz (.tgz) file. The directory where
+   *               the file is should contain a "signature" and a "md5sum" file, otherwise verification will fail.
+   *               The method is asynchronous and the result is signalled with @ref validityResult.
+   */
+  void checkValidity(const QString &fileName);
+
+  /** Creates a signature and an md5sum file for the fileName and packs
+   * everything into a gzipped tarball.
+   * @param fileName the file with full path to sign
+   *
+   * The method is asynchronous and the result is signalled with @ref fileSigned.
+   */
+  void signFile(const QString &fileName);
+  /** Get the key used for signing. This method is valid only if:
+  *  - the checkValidity was called
+  *  - the result of the validity check does not have the UNKNOWN bit set
+  *
+  *  @return the key used for signing the file
+  */
+  KeyStruct signatureKey() {return m_signatureKey;}
+
+  enum Results {
+     MD5_OK = 1, /// The MD5 sum check is OK
+     SIGNED_OK = 2, /// The file is signed with a good signature
+     SIGNED_BAD = 4, /// The file is signed with a bad signature
+     TRUSTED = 8, /// The signature is trusted
+     UNKNOWN = 16, ///The key is unknown
+     SIGNED_BAD_CLEAR = 27, ///used to clear the SIGNED_BAD flag
+     BAD_PASSPHRASE = 32 ///wrong passhprase entered
+  };
+
+public slots:
+  /** Reads the available public keys */
+  void readKeys();
+  /** Reads the available secret keys */
+  void readSecretKeys();
+  /** Verifies the integrity and the signature of a tarball file (@see m_fileName).
+   */
+  void slotCheckValidity();
+
+  /** Creates a signature and an md5sum file for the @see m_fileName and packs
+   * everything into a gzipped tarball.
+   */
+  void slotSignFile();
+
+private:
+   Security();
+
+   enum RunMode {
+       List = 0, ///read the public keys
+       ListSecret, ///read the secret keys
+       Verify, ///verify the signature
+       Sign ///create signature
+   };
+
+   KeyStruct m_signatureKey;
+   int m_result;
+   int m_runMode;
+   bool m_gpgRunning; /// true if gpg is currently running
+   bool m_keysRead; /// true if all the keys were read
+   QMap<QString, KeyStruct> m_keys; /// holds information about the available key
+   QString m_fileName; /// the file to sign/verify
+   QString m_secretKey; /// the key used for signing
+
+private slots:
+   void slotProcessExited(KProcess *process);
+   void slotDataArrived(KProcIO *process);
+
+signals:
+   /** Sent when the validity check is done.
+   *
+   *    @return the result of the check. See @ref Results
+   */
+    void validityResult(int result);
+   /** Sent when the signing is done.
+     *
+     *    @return the result of the operation. See @ref Results
+    */
+    void fileSigned(int result);
+};
+
+}
+
+#endif