securitysettings/cpwlansecurityuiplugins/cpwepui/src/wepkeyvalidator.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 31 Aug 2010 15:16:37 +0300
branchRCL_3
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permissions -rw-r--r--
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/*
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 * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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 * All rights reserved.
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 * This component and the accompanying materials are made available
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 * under the terms of "Eclipse Public License v1.0"
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 * which accompanies this distribution, and is available
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 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
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 *
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 * Initial Contributors:
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 * Nokia Corporation - initial contribution.
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 *
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 * Contributors:
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 *
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 * Description: 
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 *    Validation methods for WEP keys
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 *
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 */
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/*
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 * %version: tr1cfwln#5 %
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 */
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#include <QString>
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#include <QDebug>
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#include "wepkeyvalidator.h"
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/*!
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    \class WepKeyValidator wepkeyvalidator.cpp
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    \brief Utilities for WEP key validations.
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*/
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/*!
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    \enum WepKeyValidator::KeyStatus
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    This enum defines the validation results.
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    \var WepKeyValidator::KeyStatusOk
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    Key is valid.
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    \var WepKeyValidator::KeyStatusIllegalCharacters
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    Key contains illegal characters.
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    \var WepKeyValidator::KeyStatusWepInvalidLength
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    WEP key length is not valid. Valid keys are 
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    - hex: 10 or 26 characters
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    - ascii: 5 or 13 characters. See WlanWizardUtils::validateWpaKey().
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*/
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/*!
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 * Process WEP key validation. Following keys are allowed:
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 * 
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 * HEX: 
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 * - 64 bit: allowed key length = 10
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 * - 128 bit: allowed key length = 26
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 * 
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 * ASCII:
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 * - 64 bit: allowed key length = 5   
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 * - 128 bit: allowed key length = 13
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 * 
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 * @param key WEP Key to be validated
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 * 
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 * @return Following values are possible
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 * - KeyStatusOk
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 * - KeyStatusIllegalCharacters
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 * - KeyStatusWepInvalidLength
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 */
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WepKeyValidator::KeyStatus WepKeyValidator::validateWepKey(const QString &key)
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{
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    int length = key.length();
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    KeyStatus ret = KeyStatusOk;
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    // HEX
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    if (length == WepHex64BitMaxLength || length == WepHex128BitMaxLength) {
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        ret = isHex(key);
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    }
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    // ASCII
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    else if (length == WepAscii64BitMaxLength || length == WepAscii128BitMaxLength) {
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        ret = isAscii(key);
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    }
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    else {
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        ret = KeyStatusWepInvalidLength;
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    }
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    return ret;
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}
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/*!
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 * Process Ascii validation. Allowed characters are from 32 to 126.
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 * 
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 * @param key to be validated.
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 * 
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 * @return Following values are possible
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 * - KeyStatusOk
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 * - KeyStatusIllegalCharacters
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 */
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WepKeyValidator::KeyStatus WepKeyValidator::isAscii(const QString &key)
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{
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    QChar ch32(32);
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    QChar ch126(126);
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    const QChar *data = key.data();
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    while (!data->isNull()) {
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        if ((*data) < ch32 || (*data) > ch126) {
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            return KeyStatusIllegalCharacters;
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        }
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        ++data;
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    }
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    return KeyStatusOk;
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}
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/*!
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 * Process Hex validation. Allowed characters are
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 * - from 0 to 9
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 * - from a to f
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 * - from A to F
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 * 
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 * @param key to be validated.
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 * 
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 * @return Following values are possible
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 * - KeyStatusOk
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 * - KeyStatusIllegalCharacters
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 */
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WepKeyValidator::KeyStatus WepKeyValidator::isHex(const QString &key)
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{
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    QChar ch_A(65); // Character: A
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    QChar ch_F(70); // Character: F
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    QChar ch_a(97); // Character: a
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    QChar ch_f(102);// Character: f
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    const QChar *data = key.data();
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    while (!data->isNull()) {
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        if (data->isDigit() ||
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            (*data) >= ch_a && (*data) <= ch_f ||
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            (*data) >= ch_A && (*data) <= ch_F) {
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            ++data;
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        }
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        else {
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            return KeyStatusIllegalCharacters;
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        }
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    }
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    return KeyStatusOk;
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}