author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 27 Apr 2010 16:49:44 +0300 | |
branch | RCL_3 |
changeset 12 | b23265fb36da |
child 16 | 95674584745d |
permissions | -rw-r--r-- |
12
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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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// This file contains the implementation of the AT command parser and common utilities |
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// |
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// |
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#include "atcommandparser.h" |
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#include <hash.h> |
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#include "debug.h" |
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// Max buffer length for an MD5 digest |
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const TInt KSCPMaxHashLength( 32 ); |
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TAtCommandParser::TAtCommandParser() |
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: iCmdType(EUnknown), iCmdHandlerType(ECmdHandlerTypeUndefined) |
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{ |
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} |
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TAtCommandParser::TAtCommandParser(const TDesC8& aCmd) |
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: iCmdType(EUnknown), iCmdHandlerType(ECmdHandlerTypeUndefined) |
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{ |
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ParseAtCommand(aCmd); |
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} |
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void TAtCommandParser::ParseAtCommand(const TDesC8& aCmd) |
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{ |
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TRACE_FUNC_ENTRY |
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iCmd.Assign(aCmd); |
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iCmd.Mark(); |
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TChar c = 0; |
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// First extract the AT command "AT+COMMAND" |
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while(!iCmd.Eos() && !(c=='=' || c=='?')) |
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{ |
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iCmd.Inc(); |
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c = iCmd.Peek(); |
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} |
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TPtrC8 token = iCmd.MarkedToken(); |
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_LIT8(KAtCfun, "AT+CFUN"); |
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_LIT8(KAtCbc, "AT+CBC"); |
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_LIT8(KAtClck, "AT+CLCK"); |
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_LIT8(KAtCpwd, "AT+CPWD"); |
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_LIT8(KAtCpin, "AT+CPIN"); |
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_LIT8(KAtCusd, "AT+CUSD"); |
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_LIT8(KAtCnum, "AT+CNUM"); |
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Trace(KDebugPrintS, "token: ", &token); |
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// Determine the AT command type |
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if(!token.Compare(KAtCfun)) |
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{ |
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iCmdType = ECmdAtCfun; |
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} |
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else if(!token.Compare(KAtCbc)) |
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{ |
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iCmdType = ECmdAtCbc; |
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} |
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else if(!token.Compare(KAtClck)) |
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{ |
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iCmdType = ECmdAtClck; |
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} |
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else if(!token.Compare(KAtCpwd)) |
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{ |
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iCmdType = ECmdAtCpwd; |
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} |
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else if(!token.Compare(KAtCpin)) |
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{ |
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iCmdType = ECmdAtCpin; |
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} |
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else if(!token.Compare(KAtCusd)) |
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{ |
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iCmdType = ECmdAtCusd; |
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} |
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else if(!token.Compare(KAtCnum)) |
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{ |
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iCmdType = ECmdAtCnum; |
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} |
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else |
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{ |
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iCmdType = EUnknown; |
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TRACE_FUNC_EXIT |
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return; |
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} |
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|
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// Now find out the AT command handler type |
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if(iCmd.Eos()) |
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{ |
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iCmdHandlerType = ECmdHandlerTypeBase; |
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} |
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else if(iCmd.Peek() == '?') |
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{ |
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iCmdHandlerType = ECmdHandlerTypeRead; |
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108 |
} |
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else if(iCmd.Peek() == '=') |
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110 |
{ |
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iCmd.Inc(); |
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if(iCmd.Peek() == '?') |
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113 |
{ |
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iCmd.Inc(); |
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iCmdHandlerType = ECmdHandlerTypeTest; |
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} |
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117 |
else |
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118 |
{ |
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iCmdHandlerType = ECmdHandlerTypeSet; |
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} |
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} |
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122 |
else |
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123 |
{ |
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iCmdHandlerType = ECmdHandlerTypeUndefined; |
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} |
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126 |
TRACE_FUNC_EXIT |
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} |
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128 |
|
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129 |
TAtCommandParser::TCommandType TAtCommandParser::Command() const |
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130 |
{ |
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return iCmdType; |
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} |
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133 |
|
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TAtCommandParser::TCommandHandlerType TAtCommandParser::CommandHandlerType() const |
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135 |
{ |
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return iCmdHandlerType; |
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} |
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138 |
|
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139 |
TPtrC8 TAtCommandParser::NextParam() |
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140 |
{ |
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141 |
TRACE_FUNC_ENTRY |
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iCmd.SkipSpace(); // Skip front spaces |
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iCmd.Mark(); |
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TChar chr = 0; |
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145 |
|
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146 |
if(!iCmd.Eos()) |
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147 |
{ |
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chr = iCmd.Peek(); |
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149 |
while(!iCmd.Eos() && chr != ',' && !chr.IsSpace() && !chr.IsControl()) |
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150 |
{// Stop at any of those chars: comma, space or control |
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151 |
iCmd.Inc(); |
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152 |
chr = iCmd.Peek(); |
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153 |
} |
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154 |
} |
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155 |
|
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156 |
// Extract the token at this point |
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TPtrC8 retVal = iCmd.MarkedToken(); |
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158 |
|
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159 |
// Skip comma, space and control chars |
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while(!iCmd.Eos() && (chr == ',' || chr.IsSpace() || chr.IsControl())) |
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161 |
{ |
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162 |
iCmd.Inc(); |
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163 |
chr = iCmd.Peek(); |
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164 |
} |
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165 |
TRACE_FUNC_EXIT |
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166 |
return retVal; |
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167 |
} |
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168 |
|
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169 |
TPtrC8 TAtCommandParser::NextTextParam(TInt& aError) |
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170 |
{ |
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TPtrC8 param = NextParam(); |
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172 |
|
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if (param.Compare(KNullDesC8) == 0) |
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174 |
{ |
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175 |
aError = KErrNotFound; |
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176 |
return param; |
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177 |
} |
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178 |
|
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179 |
if(param.Length()<2 |
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180 |
|| param[0] != '"' |
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|| param[param.Length()-1] != '"') |
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182 |
{ |
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183 |
aError = KErrArgument; |
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184 |
return param.Left(0); |
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185 |
} |
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186 |
aError = KErrNone; |
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return param.Mid(1, param.Length() - 2); |
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188 |
} |
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|
189 |
|
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190 |
TInt TAtCommandParser::NextIntParam(TInt& aValue) |
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191 |
{ |
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192 |
TRACE_FUNC_ENTRY |
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193 |
TInt retVal =KErrNone; |
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TPtrC8 param = NextParam(); |
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195 |
if (param.Compare(KNullDesC8) == 0) |
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196 |
{ |
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197 |
retVal = KErrNotFound; |
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198 |
} |
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199 |
else |
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200 |
{ |
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201 |
TLex8 lex(param); |
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202 |
retVal = lex.Val(aValue); |
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203 |
} |
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204 |
TRACE_FUNC_EXIT |
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205 |
return retVal; |
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206 |
} |
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207 |
|
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208 |
TInt TAtCommandParser::HashSecurityCode(const TDesC8& aPasscode, TDes8& aHashCode) |
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209 |
{ |
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210 |
TRACE_FUNC_ENTRY |
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211 |
TInt ret = KErrNone; |
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212 |
|
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213 |
// Get MD5 Hash |
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// see remotemgmt component CSCPServer::HashISACode() for encoding algorithm |
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215 |
CMD5* hashObject = NULL; |
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TRAP( ret, hashObject = CMD5::NewL() ); |
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|
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if(ret != KErrNone) |
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{ |
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TRACE_FUNC_EXIT |
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return ret; |
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} |
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|
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RBuf pwdBuffer; |
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ret = pwdBuffer.Create(KSCPMaxHashLength); |
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if(ret != KErrNone) |
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{ |
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delete hashObject; |
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TRACE_FUNC_EXIT |
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return ret; |
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} |
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pwdBuffer.Copy(aPasscode); // convert to TDes16 |
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|
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// add TDes16 to a binary buffer |
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TUint16* inputPtr = const_cast<TUint16*>( pwdBuffer.Ptr() ); |
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TPtrC8 inputData( reinterpret_cast<TUint8*>(inputPtr), pwdBuffer.Length()*2 ); |
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|
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TPtrC8 hash = hashObject->Final( inputData ); |
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delete hashObject; |
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|
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pwdBuffer.Zero(); |
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pwdBuffer.Copy(hash); |
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|
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// Compute the hash sum as four 32-bit integers. |
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TInt64 hashSum = *(reinterpret_cast<TInt32*>(&pwdBuffer[0])) + |
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*(reinterpret_cast<TInt32*>(&pwdBuffer[4])) + |
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*(reinterpret_cast<TInt32*>(&pwdBuffer[8])) + |
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*(reinterpret_cast<TInt32*>(&pwdBuffer[12])); |
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pwdBuffer.Close(); |
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|
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// Create a five-digit security code from this number |
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TInt isaCode = ( hashSum % 90000 ) + 10000; |
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|
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// save encoded security code to TDes |
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aHashCode.Zero(); |
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aHashCode.AppendNum(isaCode); |
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|
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TRACE_FUNC_EXIT |
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return KErrNone; |
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} |
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261 |