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tdelibs/tdeui/kpassdlg.h

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// vi: ts=8 sts=4 sw=4
/* This file is part of the KDE libraries
Copyright (C) 1998 Pietro Iglio <iglio@fub.it>
Copyright (C) 1999,2000 Geert Jansen <jansen@kde.org>
Copyright (C) 2004,2005 Andrew Coles <andrew_coles@yahoo.co.uk>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef __KPassDlg_h_included__
#define __KPassDlg_h_included__
#include <tqstring.h>
#include <tqlineedit.h>
#include <kdialogbase.h>
class TQLabel;
class TQGridLayout;
class TQWidget;
/**
* @short A safe password input widget.
* @author Geert Jansen <geertj@kde.org>
*
* The widget uses the user's global "echo mode" setting.
*/
class TDEUI_EXPORT KPasswordEdit
: public TQLineEdit
{
Q_OBJECT
public:
enum EchoModes { OneStar, ThreeStars, NoEcho };
/**
* Constructs a password input widget using the user's global "echo mode" setting.
*/
KPasswordEdit(TQWidget *parent=0, const char *name=0);
// KDE4: either of the two must go! add default values for parameters
/**
* Constructs a password input widget using echoMode as "echo mode".
* Note that echoMode is a TQLineEdit::EchoMode.
* @since 3.0
*/
KPasswordEdit(EchoMode echoMode, TQWidget *parent, const char *name);
/**
* Constructs a password input widget using echoMode as "echo mode".
* Note that echoMode is a KPasswordEdit::EchoModes.
* @since 3.2
*/
KPasswordEdit(EchoModes echoMode, TQWidget *parent, const char *name);
/**
* @deprecated, will be removed in KDE 4.0
* Creates a password input widget using echoMode as "echo mode".
*/
KPasswordEdit(TQWidget *parent, const char *name, int echoMode) KDE_DEPRECATED;
/**
* Destructs the widget.
*/
~KPasswordEdit();
/**
* Returns the password. The memory is freed in the destructor
* so you should make a copy.
*/
const char *password() const { return m_Password; }
/**
* Erases the current password.
*/
void erase();
static const int PassLen;
/**
* Set the current maximum password length. If a password longer than the limit
* specified is currently entered, it is truncated accordingly.
*
* The length is capped to lie between 0 and 199 inclusive.
*
* @param newLength: The new maximum password length
* @since 3.4
*/
void setMaxPasswordLength(int newLength);
/**
* Returns the current maximum password length.
* @since 3.4
*/
int maxPasswordLength() const;
public slots:
/**
* Reimplementation
*/
virtual void insert( const TQString &);
protected:
virtual void keyPressEvent(TQKeyEvent *);
virtual void focusInEvent(TQFocusEvent *e);
virtual bool event(TQEvent *e);
private:
void init();
void showPass();
char *m_Password;
int m_EchoMode, m_Length;
};
/**
* @short A password input dialog.
*
* This dialog asks the user to enter a password. The functions you're
* probably interested in are the static methods, getPassword() and
* getNewPassword().
*
* <b>Usage example</b>\n
*
* \code
* TQCString password;
* int result = KPasswordDialog::getPassword(password, i18n("Prompt message"));
* if (result == KPasswordDialog::Accepted)
* use(password);
* \endcode
*
* \image html kpassworddialog.png "KDE Password Dialog"
*
* <b>Security notes:</b>\n
*
* Keeping passwords in memory can be a potential security hole. You should
* handle this situation with care.
*
* @li You may want to use disableCoreDump() to disable core dumps.
* Core dumps are dangerous because they are an image of the process memory,
* and thus include any passwords that were in memory.
*
* @li You should delete passwords as soon as they are not needed anymore.
* The functions getPassword() and getNewPassword() return the
* password as a TQCString. I believe this is safer than a TQString. A QString
* stores its characters internally as 16-bit wide values, so conversions are
* needed, both for creating the TQString and by using it. The temporary
* memory used for these conversion is probably not erased. This could lead
* to stray passwords in memory, even if you think you erased all of them.
*
* @author Geert Jansen <jansen@kde.org>
*/
class TDEUI_EXPORT KPasswordDialog
: public KDialogBase
{
Q_OBJECT
public:
/**
* This enum distinguishes the two operation modes of this dialog:
*/
enum Types {
/**
* The user is asked to enter a password.
*/
Password,
/**
* The user is asked to enter a password and to confirm it
* a second time. This is usually used when the user
* changes his password.
*/
NewPassword
};
/**
* Constructs a password dialog.
*
* @param type: if NewPassword is given here, the dialog contains two
* input fields, so that the user must confirm his password
* and possible typos are detected immediately.
* @param enableKeep: if true, a check box is shown in the dialog
* which allows the user to keep his password input for later.
* @param extraBttn: allows to show additional buttons, KDialogBase.
* @param parent Passed to lower level constructor.
* @param name Passed to lower level constructor
*
* @since 3.0
*/
KPasswordDialog(Types type, bool enableKeep, int extraBttn,
TQWidget *parent=0, const char *name=0);
/**
* @deprecated Variant of the previous constructor without the
* possibility to specify a parent. Will be removed in KDE 4.0
*/
KPasswordDialog(int type, TQString prompt, bool enableKeep=false,
int extraBttn=0) KDE_DEPRECATED;
// note that this implicitly deprecates the 'prompt' variants of
// getPassword() below. i guess the above constructor needs to be extended.
/**
* Construct a password dialog. Essentially the same as above but allows the
* icon in the password dialog to be set via @p iconName.
* @param type if NewPassword is given here, the dialog contains two
* input fields, so that the user must confirm his password
* and possible typos are detected immediately
* @param enableKeep: if true, a check box is shown in the dialog
* which allows the user to keep his password input for later.
* @param extraBttn: allows to show additional buttons.
* @param iconName the name of the icon to be shown in the dialog. If empty,
* a default icon is used
* @param parent Passed to lower level constructor.
* @param name Passed to lower level constructor
* @since 3.3
*/
KPasswordDialog(Types type, bool enableKeep, int extraBttn, const TQString& iconName,
TQWidget *parent = 0, const char *name = 0);
/**
* Destructs the password dialog.
*/
virtual ~KPasswordDialog();
/**
* Sets the password prompt.
*/
void setPrompt(TQString prompt);
/**
* Returns the password prompt.
*/
TQString prompt() const;
/**
* Adds a line of information to the dialog.
*/
void addLine(TQString key, TQString value);
/**
* Allow empty passwords? - Default: false
* @since 3.4
*/
void setAllowEmptyPasswords(bool allowed);
/**
* Allow empty passwords?
* @since 3.4
*/
bool allowEmptyPasswords() const;
/**
* Minimum acceptable password length.
* Default: If empty passwords are forbidden, 1;
* Otherwise, 0.
*
* @param minLength: The new minimum password length
* @since 3.4
*/
void setMinimumPasswordLength(int minLength);
/**
* Minimum acceptable password length.
* @since 3.4
*/
int minimumPasswordLength() const;
/**
* Maximum acceptable password length. Limited to 199.
* Default: No limit, i.e. -1
*
* @param maxLength: The new maximum password length.
* @since 3.4
*/
void setMaximumPasswordLength(int maxLength);
/**
* Maximum acceptable password length.
* @since 3.4
*/
int maximumPasswordLength() const;
/**
* Password length that is expected to be reasonably safe.
*
* Default: 8 - the standard UNIX password length
*
* @param reasonableLength: The new reasonable password length.
* @since 3.4
*/
void setReasonablePasswordLength(int reasonableLength);
/**
* Password length that is expected to be reasonably safe.
* @since 3.4
*/
int reasonablePasswordLength() const;
/**
* Set the password strength level below which a warning is given
* Value is in the range 0 to 99. Empty passwords score 0;
* non-empty passwords score up to 100, depending on their length and whether they
* contain numbers, mixed case letters and punctuation.
*
* Default: 1 - warn if the password has no discernable strength whatsoever
* @param warningLevel: The level below which a warning should be given.
* @since 3.4
*/
void setPasswordStrengthWarningLevel(int warningLevel);
/**
* Password strength level below which a warning is given
* @since 3.4
*/
int passwordStrengthWarningLevel() const;
/**
* Returns the password entered. The memory is freed in the destructor,
* so you should make a copy.
*/
const char *password() const { return m_pEdit->password(); }
/**
* Clears the password input field. You might want to use this after the
* user failed to enter the correct password.
* @since 3.3
*/
void clearPassword();
/**
* Returns true if the user wants to keep the password.
*/
bool keep() const { return m_Keep; }
/**
* Pops up the dialog, asks the user for a password, and returns it.
*
* @param password The password is returned in this reference parameter.
* @param prompt A prompt for the password. This can be a few lines of
* information. The text is word broken to fit nicely in the dialog.
* @param keep Enable/disable a checkbox controlling password keeping.
* If you pass a null pointer, or a pointer to the value 0, the checkbox
* is not shown. If you pass a pointer to a nonzero value, the checkbox
* is shown and the result is stored in *keep.
* @return Result code: Accepted or Rejected.
*/
static int getPassword(TQCString &password, TQString prompt, int *keep=0L);
/**
* Pops up the dialog, asks the user for a password and returns it. The
* user has to enter the password twice to make sure it was entered
* correctly.
*
* @param password The password is returned in this reference parameter.
* @param prompt A prompt for the password. This can be a few lines of
* information. The text is word broken to fit nicely in the dialog.
* @return Result code: Accepted or Rejected.
*/
static int getNewPassword(TQCString &password, TQString prompt);
/**
* Static helper function that disables core dumps.
*/
static void disableCoreDumps();
protected slots:
void slotOk();
void slotCancel();
void slotKeep(bool);
protected:
/**
* Virtual function that can be overridden to provide password
* checking in derived classes. It should return @p true if the
* password is valid, @p false otherwise.
*/
virtual bool checkPassword(const char *) { return true; }
private slots:
void enableOkBtn();
private:
void init();
void erase();
int m_Keep, m_Type, m_Row;
TQLabel *m_pHelpLbl;
TQGridLayout *m_pGrid;
TQWidget *m_pMain;
KPasswordEdit *m_pEdit, *m_pEdit2;
protected:
virtual void virtual_hook( int id, void* data );
private:
class KPasswordDialogPrivate;
KPasswordDialogPrivate* const d;
};
#endif // __KPassDlg_h_included__