wlanutilities/wlanwizard/src/wlanwizardutils.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 31 Aug 2010 16:18:40 +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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 *   WLAN Wizard Utilities
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 *
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 */
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// System includes
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#include <QString>
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#include <QDebug>
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#include <QVariant>
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// User includes
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#include "wlanwizardutils.h"
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#include "OstTraceDefinitions.h"
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#ifdef OST_TRACE_COMPILER_IN_USE
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#include "wlanwizardutilsTraces.h"
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#endif
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/*!
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    \class WlanWizardUtils wlanwizardutils.cpp
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    \brief Utilities for WLAN key validations.
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*/
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/*!
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    \enum WlanWizardUtils::KeyStatus
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    This enum defines the validation results.
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    \var WlanWizardUtils::KeyStatusOk
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    Key is valid.
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    \var WlanWizardUtils::KeyStatusIllegalCharacters
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    Key contains illegal characters.
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    \var WlanWizardUtils::KeyStatusWpaTooShort
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    WPA key is too short. Minimum allowed length is 8. See 
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    WlanWizardUtils::validateWpaKey().
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    \var WlanWizardUtils::KeyStatusWpaTooLong
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    WPA key is too long. Minimum allowed length is 64 for hex key and 63 for 
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    ascii key. See WlanWizardUtils::validateWpaKey().
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    \var WlanWizardUtils::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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    \var WlanWizardUtils::SsidMinLength
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    Minumum acceptable length for SSID.
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    \var WlanWizardUtils::SsidMaxLength
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    Maximum acceptable length for SSID.
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    \var WlanWizardUtils::WpaMinLength
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    Minumum acceptable length for WPA key.
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    \var WlanWizardUtils::WpaMaxLength
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    Maximum acceptable length for WPA key.
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    \var WlanWizardUtils::WepHex64BitMaxLength
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    Length of WEP key: format hex 64-bits.
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    \var WlanWizardUtils::WepHex128BitMaxLength
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    Length of WEP key: format hex 128-bits.
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    \var WlanWizardUtils::WepAscii64BitMaxLength
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    Length of WEP key: format ascii 64-bits.
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    \var WlanWizardUtils::WepAscii128BitMaxLength
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    Length of WEP key: format ascii 128-bits.
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*/
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// External function prototypes
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// Local constants
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// ======== LOCAL FUNCTIONS ========
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// ======== MEMBER FUNCTIONS ========
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/*! 
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   Process WPA key validation. A passphrase can contain from 8 to 63 ASCII
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   characters where each character MUST have a decimal encoding in the range of
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   32 to 126, inclusive.
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   A preshared key is stored as 64 character hex string.
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   @param [in] key PSK to be validated
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   @return Following values are possible
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   - KeyStatusOk
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   - KeyStatusIllegalCharacters
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   - KeyStatusWpaTooShort
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   - KeyStatusWpaTooLong
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 */
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WlanWizardUtils::KeyStatus WlanWizardUtils::validateWpaKey(const QString &key)
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{
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    OstTraceFunctionEntry0( WLANWIZARDUTILS_VALIDATEWPAKEY_ENTRY );
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#ifdef OST_TRACE_COMPILER_IN_USE
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    TPtrC tmp(key.utf16(),key.length() );
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    OstTraceExt1( TRACE_NORMAL, WLANWIZARDUTILS_VALIDATEWPAKEY, 
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        "WlanWizardUtils::validateWpaKey;key=%S", tmp );
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#endif
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    int length = key.length();
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    KeyStatus ret = KeyStatusOk;
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    if (length < WpaMinLength) {
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        ret = KeyStatusWpaTooShort;
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    } else if (length > WpaMaxLength) {
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        ret = KeyStatusWpaTooLong;
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    } else if (length == WpaMaxLength) {
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        ret = isHex(key);
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    } else {
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        ret = isAscii(key);
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    }
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    OstTrace1( 
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        TRACE_NORMAL, WLANWIZARDUTILS_VALIDATEWPAKEY_RETURN, 
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        "WlanWizardUtils::validateWpaKey - Return;ret=%{KeyStatus}", ret );
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    OstTraceFunctionExit0( WLANWIZARDUTILS_VALIDATEWPAKEY_EXIT );
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   136
    return ret;
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}
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   138
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/*!
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   Process WEP key validation. Following keys are allowed:
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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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   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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   @param [in] key WEP Key to be validated
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   151
   
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   @return Following values are possible
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   - KeyStatusOk
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   - KeyStatusIllegalCharacters
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   155
   - KeyStatusWepInvalidLength
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   156
 */
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WlanWizardUtils::KeyStatus WlanWizardUtils::validateWepKey(const QString &key)
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{
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    OstTraceFunctionEntry0( WLANWIZARDUTILS_VALIDATEWEPKEY_ENTRY );
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#ifdef OST_TRACE_COMPILER_IN_USE
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    TPtrC tmp(key.utf16(),key.length() );
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    OstTraceExt1( TRACE_NORMAL, WLANWIZARDUTILS_VALIDATEWEPKEY, 
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   163
        "WlanWizardUtils::validateWepKey;key=%S", tmp );
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   164
#endif
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   165
    
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    int length = key.length();
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    KeyStatus ret = KeyStatusOk;
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   168
    
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   169
    if (length == WepHex64BitMaxLength || length == WepHex128BitMaxLength) {
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        ret = isHex(key);
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   171
    } else if (length == WepAscii64BitMaxLength || length == WepAscii128BitMaxLength) {
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        ret = isAscii(key);
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   173
    } else {
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        ret = KeyStatusWepInvalidLength;
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   175
    }
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   176
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   177
    OstTrace1( 
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   178
        TRACE_NORMAL, WLANWIZARDUTILS_VALIDATEWEPKEY_RETURN, 
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   179
        "WlanWizardUtils::validateWepKey - Return;ret=%{KeyStatus}", ret );
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   180
    
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   181
    OstTraceFunctionExit0( WLANWIZARDUTILS_VALIDATEWEPKEY_EXIT );
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   182
    return ret;
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   183
}
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   184
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   185
/*!
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   186
   Process Ascii validation. Allowed characters are from 32 to 126.
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   187
   
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   @param [in] key to be validated.
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   189
   
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   190
   @return Following values are possible
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   191
   - KeyStatusOk
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   192
   - KeyStatusIllegalCharacters
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   193
 */
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   194
WlanWizardUtils::KeyStatus WlanWizardUtils::isAscii(const QString &key)
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{
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   196
    OstTraceFunctionEntry0( WLANWIZARDUTILS_ISASCII_ENTRY );
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   197
    static const QChar ch32(32);   // First visible ascii character
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    static const QChar ch126(126); // Last visible ascii character
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   199
  
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    const QChar *data = key.data();
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   201
    while (!data->isNull()) {
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   202
        if ((*data) < ch32 || (*data) > ch126) {
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   203
            OstTraceFunctionExit0( WLANWIZARDUTILS_ISASCII_EXIT );
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   204
            return KeyStatusIllegalCharacters;
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   205
        }
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   206
        ++data;
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   207
    }
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   208
    OstTraceFunctionExit0( DUP1_WLANWIZARDUTILS_ISASCII_EXIT );
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   209
    return KeyStatusOk;
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   210
}
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   211
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   212
/*!
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   213
   Process Hex validation. Allowed characters are
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   214
   - from 0 to 9
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   215
   - from a to f
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   216
   - from A to F
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   217
   
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   218
   @param [in] key to be validated.
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   219
   
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   220
   @return Following values are possible
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   221
   - KeyStatusOk
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   222
   - KeyStatusIllegalCharacters
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   223
 */
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   224
WlanWizardUtils::KeyStatus WlanWizardUtils::isHex(const QString &key)
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   225
{
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   226
    OstTraceFunctionEntry0( WLANWIZARDUTILS_ISHEX_ENTRY );
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   227
    static const QChar ch_A(65); // Character: A
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    static const QChar ch_F(70); // Character: F
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    static const QChar ch_a(97); // Character: a
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    static const 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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        } else {
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            OstTraceFunctionExit0( WLANWIZARDUTILS_ISHEX_EXIT );
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            return KeyStatusIllegalCharacters;
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        }
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    }
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    OstTraceFunctionExit0( DUP1_WLANWIZARDUTILS_ISHEX_EXIT );
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    return KeyStatusOk;
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}
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/*!
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   Process SSID validation.
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   @param [in] ssid to be validated.
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   @return Following values are possible
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   - SsidStatusOk
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   - SsidStatusInvalidLength
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 */
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WlanWizardUtils::SsidStatus WlanWizardUtils::validateSsid(const QString &ssid)
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{
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    OstTraceFunctionEntry0( WLANWIZARDUTILS_VALIDATESSID_ENTRY );
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    TPtrC tmp(ssid.utf16(), ssid.length() );
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    OstTraceExt1( TRACE_NORMAL, WLANWIZARDUTILS_VALIDATESSID, 
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        "WlanWizardUtils::validateSsid;ssid=%S", tmp );
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    SsidStatus ret = SsidStatusOk;
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    int len = ssid.length();
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    if (len < SsidMinLength || len > SsidMaxLength) {
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        ret = SsidStatusInvalidLength;
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    }
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    OstTrace1( 
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        TRACE_NORMAL, WLANWIZARDUTILS_VALIDATESSID_RETURN, 
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        "WlanWizardUtils::validateSsid - Return;ret=%{SsidStatus}", ret );
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    OstTraceFunctionExit0( WLANWIZARDUTILS_VALIDATESSID_EXIT );
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    return ret;
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}