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os/security/cryptoservices/certificateandkeymgmt/asn1/sequencedec.cpp
author sl@SLION-WIN7.fritz.box
Fri, 15 Jun 2012 03:10:57 +0200
changeset 0 bde4ae8d615e
permissions -rw-r--r--
First public contribution. 
     1 /*

     2 * Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 * This file contains the implementation of the ASN1 Sequence and Sequence-of 

    16 * object, as described in X208 Sections 20 and 21 and X209 Sections 14 and 

    17 * 15. The sequence object can contain an ordered series of zero, one or more

    18 * other ASN1 objects. The sequence-of object contains zero, one or more of 

    19 * the objects described in its definition. The data encodings of both these

    20 * objects is identical. The ordering of the objects contained within the 

    21 * sequence is defined outside the scope of this object, normally this would

    22 * be handled by an object deriving from this object but it may be handled

    23 * somewhere else. 

    24 *

    25 */

    26 

    27 

    28 #include "asn1dec.h"

    29 

    30 

    31 void TASN1DecSequence::CleanupSequence(TAny* aArray)

    32 	{

    33 	CArrayPtrFlat<TASN1DecGeneric>* array = REINTERPRET_CAST(CArrayPtrFlat<TASN1DecGeneric>*, aArray);

    34 	array->ResetAndDestroy();

    35 	delete array;

    36 	}

    37 

    38 EXPORT_C TASN1DecSequence::TASN1DecSequence()

    39 	{

    40 	}

    41 	

    42 EXPORT_C CArrayPtrFlat<TASN1DecGeneric>* TASN1DecSequence::DecodeDERLC(const TDesC8& aSource,TInt& aPos)

    43 

    44 	{

    45 	CArrayPtrFlat<TASN1DecGeneric>* ret = new(ELeave) CArrayPtrFlat<TASN1DecGeneric> (1);

    46 	TCleanupItem cleanupSeq(TASN1DecSequence::CleanupSequence, ret);

    47 	CleanupStack::PushL(cleanupSeq);

    48 	TASN1DecGeneric gen(aSource.Right(aSource.Length() - aPos));

    49 	gen.InitL();

    50 	aPos += gen.LengthDER();

    51 	DecodeContentsL(gen.GetContentDER(), *ret);

    52 	return ret;

    53 	}

    54 

    55 EXPORT_C CArrayPtrFlat<TASN1DecGeneric>* TASN1DecSequence::DecodeDERLC(const TASN1DecGeneric& aSource)

    56 	{

    57 	CArrayPtrFlat<TASN1DecGeneric>* ret = new(ELeave) CArrayPtrFlat<TASN1DecGeneric> (1);

    58 	TCleanupItem cleanupSeq(TASN1DecSequence::CleanupSequence, ret);

    59 	CleanupStack::PushL(cleanupSeq);

    60 	DecodeContentsL(aSource.GetContentDER(), *ret);

    61 	return ret;

    62 	}

    63 

    64 EXPORT_C CArrayPtrFlat<TASN1DecGeneric>* TASN1DecSequence::DecodeDERLC(const TDesC8& aSource,TInt& aPos, TInt aMin, TInt aMax)

    65 

    66 	{

    67 	CArrayPtrFlat<TASN1DecGeneric>* ret = DecodeDERLC(aSource, aPos);

    68 	TInt count = ret->Count();

    69 	if ((count < aMin) || (count > aMax))

    70 		{

    71 		User::Leave(KErrArgument);

    72 		}

    73 	return ret;

    74 	}

    75 

    76 EXPORT_C CArrayPtrFlat<TASN1DecGeneric>* TASN1DecSequence::DecodeDERLC(const TASN1DecGeneric& aSource, TInt aMin, TInt aMax)

    77 	{

    78 	CArrayPtrFlat<TASN1DecGeneric>* ret = DecodeDERLC(aSource);

    79 	TInt count = ret->Count();

    80 	if ((count < aMin) || (count > aMax))

    81 		{

    82 		User::Leave(KErrArgument);

    83 		}

    84 	return ret;

    85 	}

    86 

    87 void TASN1DecSequence::DecodeContentsL(const TDesC8& aSource, CArrayPtrFlat<TASN1DecGeneric>& aDest)

    88 	{

    89 	TInt pos = 0;

    90 	while (pos < aSource.Length())

    91 		{

    92 		TPtrC8 p(aSource.Right(aSource.Length() - pos));

    93 		TASN1DecGeneric* Decoded = new(ELeave) TASN1DecGeneric(p);

    94 		CleanupStack::PushL(Decoded);

    95 		Decoded->InitL();

    96 		aDest.AppendL(Decoded);

    97 		pos+=Decoded->LengthDER();

    98 		CleanupStack::Pop();

    99 		}

   100 	}
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