webservices/wsoviplugin/src/wsoviutils.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 18 Jan 2010 21:21:14 +0200
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permissions -rw-r--r--
Revision: 201001 Kit: 201003
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/*
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* Copyright (c) 2008 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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*
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*/
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// INCLUDE FILES
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#include <hash.h> 
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#include <e32math.h>
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#include "wsoviutils.h"
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#include "wsovicons.h"
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#include "sencryptoutils.h"
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HBufC8* CWSOviUtils::NormalizeStringLC(const TDesC8& aMethod, const TDesC8& aUrl, const TDesC8& aHeader )
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	{
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	TInt methodLen = aMethod.Length();
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	TInt urlLen = aUrl.Length() + KHexWidth*CountCharsToEncode(aUrl);
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	TInt headerLen = aHeader.Length() + KHexWidth*CountCharsToEncode(aHeader);
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	TInt normalizedStringLen = methodLen + OAuth::KAmpMark().Length() + urlLen + OAuth::KAmpMark().Length() + headerLen;
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	HBufC8* pNormalizedString = HBufC8::NewLC(normalizedStringLen);
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	HBufC8* method = aMethod.AllocLC();
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	method->Des().UpperCase();
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	pNormalizedString->Des().Append(*method);
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	pNormalizedString->Des().Append(OAuth::KAmpMark());
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	HBufC8* urlLowercase = aUrl.AllocLC();
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	_LIT8(KSlash,"/");
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	_LIT8(KDoubleSlash,"//");
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	_LIT8(KQuestionMark,"?");
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	TInt posStart = urlLowercase->Find(KDoubleSlash) + KDoubleSlash().Length();
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	TInt posEnd = urlLowercase->Mid(posStart).Find(KSlash);
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	if(posEnd == KErrNotFound)
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		{
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		urlLowercase->Des().LowerCase();
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		}
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	else 
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		{
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		urlLowercase->Des().LeftTPtr(posEnd).LowerCase();
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		}
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	TPtr8 urlLowercaseBase(urlLowercase->Des());
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	//cut query & fragment, see http://oauth.net/core/1.0/ (9.1.2.  Construct Request URL)
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	posEnd = urlLowercase->Find(KQuestionMark);
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	if(posEnd != KErrNotFound)
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		{
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		urlLowercaseBase.Set(urlLowercase->Des().LeftTPtr(posEnd));
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		}
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	HBufC8* url = EncodeCharsLC(urlLowercaseBase);
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	pNormalizedString->Des().Append(*url);
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	CleanupStack::PopAndDestroy(url);
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	CleanupStack::PopAndDestroy(urlLowercase);
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	pNormalizedString->Des().Append(OAuth::KAmpMark());
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	HBufC8* header = EncodeCharsLC(aHeader);
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	pNormalizedString->Des().Append(*header);
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	CleanupStack::PopAndDestroy(header);
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	CleanupStack::PopAndDestroy(method);
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	return pNormalizedString;
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	}
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HBufC8* CWSOviUtils::DigestAuthStringL(const TDesC8& aNonce, const TDesC8& aTimestamp, const TDesC8& aUser, const TDesC8& aPassword)
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	{
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	_LIT8(KFormatUser, "/accounts/%S/");
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	HBufC8* validatorString = HBufC8::NewLC(KFormatUser().Length()+aUser.Length());
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	TPtr8 validatorPtr = validatorString->Des();
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	validatorPtr.Format(KFormatUser,&aUser);
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	CSHA1* sha1 = CSHA1::NewL();
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	sha1->Update(*validatorString);
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	TPtrC8 validator = sha1->Final(aPassword);
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	CleanupStack::PopAndDestroy(validatorString);
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	CleanupStack::PushL(sha1);
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	HBufC8* base64validator = SenCryptoUtils::EncodeBase64L(validator);
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	sha1->Reset();
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	sha1->Update(aNonce);
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	sha1->Update(aTimestamp);
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	TPtrC8 digest = sha1->Final(*base64validator);
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	delete base64validator;
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	HBufC8* digestBase64 = SenCryptoUtils::EncodeBase64L(digest);
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	CleanupStack::PopAndDestroy(sha1);
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	return digestBase64;
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	}
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TInt CWSOviUtils::CountCharsToEncode(const TDesC8& aString)
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	{
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	const TUint8* ref=NULL;
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	const TUint8 charLen = 1;
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	TUint count(0);
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	TPtrC8 unreserveChars(OAuth::KUnReserveChars);
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	TUint strLen = aString.Length();
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	ref=aString.Ptr();
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	for(TInt i=0; i<strLen; i++)
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		{
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		if(unreserveChars.Find(ref, charLen) < 0)
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		count++;
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		ref+=1;
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		}
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	return count;	
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	}
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HBufC8* CWSOviUtils::EncodeCharsLC(const TDesC8& aString)
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	{
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	TInt len = aString.Length();
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	TInt encodedLength = aString.Length() + KHexWidth*CountCharsToEncode(aString);
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	const TUint8* ref=NULL;
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	TPtrC8 unreserveChars(OAuth::KUnReserveChars);
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	ref=aString.Ptr();
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	HBufC8* pEncoded = HBufC8::NewLC(encodedLength);
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	TPtr8 buf = pEncoded->Des();
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    for (TInt i = 0; i < len; i++)
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        {
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		if(unreserveChars.Find(ref, KCharWidth) < 0)
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			{
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			TBuf8<2> charcode;
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			buf.Append(OAuth::KPercent);
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			charcode.AppendNumFixedWidth(aString[i], EHex, KHexWidth);
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			charcode.UpperCase();
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			buf.Append(charcode);			
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			}
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			else
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			{
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			buf.Append(&aString[i], KCharWidth);				
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			}
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		ref+=1;
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        }
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	return pEncoded;
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	}
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HBufC8* CWSOviUtils::FormEncodeCharsLC(const TDesC8& aString)
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    {
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    TInt len = aString.Length();
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    TInt encodedLength = aString.Length() + KHexWidth*CountCharsToEncode(aString);
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    const TUint8* ref=NULL;
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    TPtrC8 unreserveChars(OAuth::KUnReserveChars);
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    ref=aString.Ptr();
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    HBufC8* pEncoded = HBufC8::NewLC(encodedLength);
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    TPtr8 buf = pEncoded->Des();
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    for (TInt i = 0; i < len; i++)
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        {
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        if(unreserveChars.Find(ref, KCharWidth) < 0)
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            {
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            if (*ref == KSpaceChar)
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                {
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                buf.Append('+');
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                }
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            else{
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                TBuf8<2> charcode;
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                buf.Append(OAuth::KPercent);
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                charcode.AppendNumFixedWidth(aString[i], EHex, KHexWidth);
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                charcode.UpperCase();
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                buf.Append(charcode);
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                }
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            }
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            else
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            {
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            buf.Append(&aString[i], KCharWidth);                
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            }
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        ref+=1;
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        }
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    return pEncoded;
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    }