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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 the License "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 WPA/WPA2 & WPA2 only keys
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*
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*/
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/*
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* %version: 1 %
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*/
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//System Includes
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#include <QString>
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//User Includes
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#include "wpakeyvalidator.h"
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#include "OstTraceDefinitions.h"
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//Trace Definition
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#ifdef OST_TRACE_COMPILER_IN_USE
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#include "wpakeyvalidatorTraces.h"
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#endif
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/*!
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\class WpaKeyValidator wpakeyvalidator.cpp
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\brief Utilities for WPA/WPA2 key validations.
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*/
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/*!
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\enum WpaKeyValidator::KeyStatus
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This enum defines the validation results.
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\var WpaKeyValidator::KeyStatusOk
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Key is valid.
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\var WpaKeyValidator::KeyStatusIllegalCharacters
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Key contains illegal characters.
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\var WpaKeyValidator::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 WpaKeyValidator::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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*/
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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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*
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* A preshared key is stored as 64 character hex string.
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*
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* @param key PSK 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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* - KeyStatusWpaTooShort
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* - KeyStatusWpaTooLong
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*/
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WpaKeyValidator::KeyStatus WpaKeyValidator::validateWpaKey(const QString &key)
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{
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OstTraceFunctionEntry0( WPAKEYVALIDATOR_VALIDATEWPAKEY_ENTRY );
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int length = key.length();
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KeyStatus ret = KeyStatusOk;
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if (length < WpaMinLenght) {
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ret = KeyStatusWpaTooShort;
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}
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else if (length > WpaMaxLenght) {
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ret = KeyStatusWpaTooLong;
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}
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// hex string
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else if (length == WpaMaxLenght) {
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ret = isHex(key);
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}
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else {
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ret = isAscii(key);
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}
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OstTraceFunctionExit0( WPAKEYVALIDATOR_VALIDATEWPAKEY_EXIT );
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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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WpaKeyValidator::KeyStatus WpaKeyValidator::isAscii(const QString &key)
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{
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OstTraceFunctionEntry0( WPAKEYVALIDATOR_ISASCII_ENTRY );
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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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OstTraceFunctionExit0( WPAKEYVALIDATOR_ISASCII_EXIT );
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return KeyStatusIllegalCharacters;
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}
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++data;
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}
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OstTraceFunctionExit0( DUP1_WPAKEYVALIDATOR_ISASCII_EXIT );
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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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WpaKeyValidator::KeyStatus WpaKeyValidator::isHex(const QString &key)
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{
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OstTraceFunctionEntry0( WPAKEYVALIDATOR_ISHEX_ENTRY );
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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() || (*data) >= ch_a && (*data) <= ch_f || (*data)
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>= ch_A && (*data) <= ch_F) {
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++data;
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}
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else {
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OstTraceFunctionExit0( WPAKEYVALIDATOR_ISHEX_EXIT );
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return KeyStatusIllegalCharacters;
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}
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}
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OstTraceFunctionExit0( DUP1_WPAKEYVALIDATOR_ISHEX_EXIT );
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return KeyStatusOk;
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}
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