1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/security/cryptoservices/certificateandkeymgmt/asn1/oidenc.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,126 @@
     1.4 +/*
     1.5 +* Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.6 +* All rights reserved.
     1.7 +* This component and the accompanying materials are made available
     1.8 +* under the terms of the License "Eclipse Public License v1.0"
     1.9 +* which accompanies this distribution, and is available
    1.10 +* at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.11 +*
    1.12 +* Initial Contributors:
    1.13 +* Nokia Corporation - initial contribution.
    1.14 +*
    1.15 +* Contributors:
    1.16 +*
    1.17 +* Description: 
    1.18 +* Methods for encoding object identifiers
    1.19 +*
    1.20 +*/
    1.21 +
    1.22 +
    1.23 +#include "base128enc.h"
    1.24 +#include "panic.h"
    1.25 +
    1.26 +#include <asn1enc.h>
    1.27 +
    1.28 +const TInt KArrayGranularity = 5;
    1.29 +
    1.30 +const TUint KSecondTermBigLimit = 175;
    1.31 +const TUint KFirstTermMultiplier = 40;
    1.32 +const TUint KFirstTermMax = 2;
    1.33 +
    1.34 +
    1.35 +EXPORT_C CASN1EncObjectIdentifier* CASN1EncObjectIdentifier::NewLC(const TDesC& aStr)
    1.36 +	{
    1.37 +	CASN1EncObjectIdentifier* self = new (ELeave) CASN1EncObjectIdentifier();
    1.38 +	CleanupStack::PushL(self);
    1.39 +	self->ConstructL(aStr);
    1.40 +	return self;
    1.41 +	}
    1.42 +
    1.43 +EXPORT_C CASN1EncObjectIdentifier* CASN1EncObjectIdentifier::NewL(const TDesC& aStr)
    1.44 +	{
    1.45 +	CASN1EncObjectIdentifier* self = NewLC(aStr);
    1.46 +	CleanupStack::Pop(self);
    1.47 +	return self;
    1.48 +	}
    1.49 +
    1.50 +EXPORT_C CASN1EncObjectIdentifier::~CASN1EncObjectIdentifier()
    1.51 +	{
    1.52 +	iData.Close();
    1.53 +	}
    1.54 +
    1.55 +
    1.56 +CASN1EncObjectIdentifier::CASN1EncObjectIdentifier()
    1.57 +: CASN1EncPrimitive(EASN1ObjectIdentifier), iData(KArrayGranularity)
    1.58 +	{
    1.59 +	}
    1.60 +
    1.61 +
    1.62 +// Takes ints in a string, delimited by '.' characters in between (not at ends)
    1.63 +void CASN1EncObjectIdentifier::ConstructL(const TDesC& aStr)
    1.64 +	{
    1.65 +	iData.Reset();
    1.66 +	TInt index = 0;
    1.67 +	TLex lex(aStr);
    1.68 +
    1.69 +	// First term
    1.70 +	__ASSERT_ALWAYS(!lex.Eos(), User::Leave(KErrBadDescriptor));
    1.71 +	TUint first;
    1.72 +	User::LeaveIfError(lex.Val(first));
    1.73 +	__ASSERT_ALWAYS(first <= KFirstTermMax, User::Leave(KErrBadDescriptor));
    1.74 +	// Static cast takes 8 least sig bits
    1.75 +	iFirstOctet = STATIC_CAST(TUint8, KFirstTermMultiplier * first);
    1.76 +
    1.77 +	// A '.' to delimit
    1.78 +	__ASSERT_ALWAYS(!lex.Eos() && lex.Get() == '.',	User::Leave(KErrBadDescriptor));
    1.79 +
    1.80 +	// Second term
    1.81 +	__ASSERT_ALWAYS(!lex.Eos(), User::Leave(KErrBadDescriptor));
    1.82 +	TUint second;
    1.83 +	User::LeaveIfError(lex.Val(second));
    1.84 +	__ASSERT_ALWAYS((first < KFirstTermMax && second < KFirstTermMultiplier)
    1.85 +		|| (first == KFirstTermMax && second <= KSecondTermBigLimit),
    1.86 +		User::Leave(KErrBadDescriptor));
    1.87 +	// Static cast takes 8 least sig bits
    1.88 +	iFirstOctet = STATIC_CAST(TUint8, iFirstOctet + second);
    1.89 +
    1.90 +	// Remaining terms
    1.91 +	while (!lex.Eos())
    1.92 +		{
    1.93 +		// Delimiter, and check we're not at end after that
    1.94 +		__ASSERT_ALWAYS(lex.Get() == '.' && !lex.Eos(),	User::Leave(KErrBadDescriptor));
    1.95 +
    1.96 +		TUint value;
    1.97 +		User::LeaveIfError(lex.Val(value));
    1.98 +		++index;
    1.99 +
   1.100 +		// Store the data away for later
   1.101 +		TASN1EncBase128DER encoder(value);
   1.102 +		User::LeaveIfError(iData.Append(encoder));
   1.103 +		}
   1.104 +
   1.105 +	// Remainder of ConstructL is here - safe to call CalculateContentsLengthDER now.
   1.106 +	CASN1EncPrimitive::ConstructL();
   1.107 +	}
   1.108 +
   1.109 +
   1.110 +void CASN1EncObjectIdentifier::CalculateContentsLengthDER()
   1.111 +	{
   1.112 +	iContentsLengthDER = 1;
   1.113 +	for (TInt i = iData.Count() - 1; i >= 0; --i)
   1.114 +		{
   1.115 +		iContentsLengthDER += iData[i].LengthDER();
   1.116 +		}
   1.117 +	}
   1.118 +
   1.119 +
   1.120 +void CASN1EncObjectIdentifier::WriteContentsDERL(TDes8& aBuf) const
   1.121 +	{
   1.122 +	aBuf[0] = iFirstOctet;
   1.123 +	TUint cursor = 1;
   1.124 +	TInt count = iData.Count();
   1.125 +	for (TInt i = 0; i < count; ++i)
   1.126 +		{
   1.127 +		iData[i].WriteDERL(aBuf, cursor);
   1.128 +		}
   1.129 +	}