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/*
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* Copyright (c) 2005-2009 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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*
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*/
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#include "pkcs7digestinfo.h"
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#include "pkcs7asn1.h"
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EXPORT_C CPKCS7DigestInfo* CPKCS7DigestInfo::NewL(const TDesC8& aRawData)
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{
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CPKCS7DigestInfo* self = new (ELeave) CPKCS7DigestInfo();
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CleanupStack::PushL(self);
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self->ConstructL(aRawData);
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CleanupStack::Pop(self);
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return self;
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}
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CPKCS7DigestInfo::~CPKCS7DigestInfo()
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{
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}
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CPKCS7DigestInfo::CPKCS7DigestInfo()
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{
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}
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EXPORT_C const TDesC8& CPKCS7DigestInfo::Digest() const
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{
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return iDigest;
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}
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EXPORT_C TAlgorithmId CPKCS7DigestInfo::Algorithm() const
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{
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return iAlgorithmId;
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}
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EXPORT_C const TPtrC8& CPKCS7DigestInfo::EncodedParams() const
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{
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return iEncodedParams;
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}
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void CPKCS7DigestInfo::ConstructL(const TDesC8& aDigestData)
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{
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CArrayPtr<TASN1DecGeneric>* digestInfo = PKCS7ASN1::DecodeSequenceLC(aDigestData);
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// Check if both the digestAlgorithm and the Digest are present.
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if ( digestInfo->Count() != 2 )
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{
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User::Leave(KErrArgument);
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}
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// DIGEST ALGORITHM
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// Get the algorithm identifier and the encoded parameters present in the sequence.
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const TASN1DecGeneric* digestInfoAt0 = digestInfo->At(0);
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if(digestInfoAt0->Tag() != EASN1Sequence || digestInfoAt0->Class() != EUniversal)
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{
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User::Leave(KErrArgument);
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}
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CX509AlgorithmIdentifier* digestAlg = CX509AlgorithmIdentifier::NewLC(digestInfo->At(0)->Encoding());
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TAlgorithmId algorithmId = digestAlg->Algorithm();
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switch(algorithmId)
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{
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case EMD2:
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{
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iAlgorithmId = EMD2;
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}
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break;
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case EMD5:
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{
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iAlgorithmId = EMD5;
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}
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break;
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case ESHA1:
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{
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iAlgorithmId = ESHA1;
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}
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break;
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default:
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User::Leave(KErrNotSupported);
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}
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iEncodedParams.Set(digestAlg->EncodedParams());
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// DIGEST
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const TASN1DecGeneric* digestInfoAt1 = digestInfo->At(1);
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if(digestInfoAt1->Tag() != EASN1OctetString || digestInfoAt1->Class() != EUniversal)
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{
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User::Leave(KErrArgument);
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}
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TASN1DecGeneric octetStringDecoder(*(digestInfo->At(1)));
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octetStringDecoder.InitL();
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iDigest.Set(octetStringDecoder.GetContentDER());
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CleanupStack::PopAndDestroy(2,digestInfo);// digestInfo, digestAlg
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}
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