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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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/**
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@file
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@publishedPartner
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@released
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*/
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#ifndef __PKCS7_DIGEST_INFO_H__
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#define __PKCS7_DIGEST_INFO_H__
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#include <e32base.h>
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#include <x509cert.h>
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#include <signed.h>
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#include <asn1dec.h>
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/**
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Provides the means to decode PKCS#7 encoded DigestInfo Structure.
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*/
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class CPKCS7DigestInfo : public CBase
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{
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public:
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/**
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Creates a new PKCS#7 DigestInfo object.
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@param aRawData contains a PKCS#7 DigestInfo Structure
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@return A pointer to the newly allocated object.
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@leave KErrArgument if digestAlgorithm and digest is not present.
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@leave KErrNotSupported if algorithm is other than MD2, MD5 and SHA1.
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*/
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IMPORT_C static CPKCS7DigestInfo* NewL(const TDesC8& aRawData);
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/**
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An Algorithm present DigestAlgorithmIdentifier.
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@return The enum which identifies the type of Algorithm
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used to obtain the hash.
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*/
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IMPORT_C TAlgorithmId Algorithm() const;
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/**
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Encoded Parameters present in the DigestAlgorithmIdentifier.
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The client has to check for data length. It is 0 in case there are no EncodedParams
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@return The Encoded Parameters which is in the DigestAlgorithmIdentifier.
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*/
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IMPORT_C const TPtrC8& EncodedParams() const;
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/**
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The Digest which is in the DigestInfo.
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@return The Digest which is in the DigestInfo and is an Octet String.
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*/
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IMPORT_C const TDesC8& Digest() const;
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/**
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Destructor.
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*/
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virtual ~CPKCS7DigestInfo();
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private:
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/**
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Constructor.
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*/
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CPKCS7DigestInfo();
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/**
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Copy Constructor.
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@param aDigestInfo A CPKCS7DigestInfo object.
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*/
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CPKCS7DigestInfo(const CPKCS7DigestInfo& aDigestInfo);
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/**
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Assignment operator.
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@param aDigestInfo A CPKCS7DigestInfo object.
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@return A reference to CPKCS7DigestInfo class.
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*/
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CPKCS7DigestInfo& operator=(const CPKCS7DigestInfo& aDigestInfo);
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/**
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Decodes the given ASN1 DigestInfo. Below is the ASN1 syntax
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DigestInfo ::= SEQUENCE
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{
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digestAlgorithm DigestAlgorithmIdentifier,
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digest Digest
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}
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Digest ::= OCTET String
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DigestAlgorithmIdentifier ::= AlgorithmIdentifier
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AlgorithmIdentifier ::= SEQUENCE
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{
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algorithm ALGORITHM.&id({SupportedAlgorithms}),
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parameters ALGORITHM.&Type({SupportedAlgorithms}{@ algorithm}) OPTIONAL
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}
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@param aRawData A descriptor containing the PKCS7 DigestInfo Sequence.
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@leave KErrArgument if digestAlgorithm and digest is not present.
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@leave KErrNotSupported if algorithm is other than MD2, MD5 and SHA1.
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@see TASN1DecGeneric, CX509AlgorithmIdentifier.
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*/
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void ConstructL(const TDesC8& aRawData);
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private:
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/**
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The object identifier which identifies the message-digest algorithm.
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A message-digest algorithm maps an octet string (the message) to
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another octet string (the message digest)
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*/
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TAlgorithmId iAlgorithmId;
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/** Encoded Parameters which is in the DigestAlgorithmIdentifier */
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TPtrC8 iEncodedParams;
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/**
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The Digest is present in the DigestInfo.
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It is the result of the message-digesting process
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*/
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TPtrC8 iDigest;
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};
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#endif //__PKCS7_DIGEST_INFO_H__
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