cryptoservices/certificateandkeymgmt/inc/pkcs12macdata.h
author Santosh Patil <santosh.v.patil@nokia.com>
Wed, 08 Jul 2009 11:25:26 +0100
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child 8 35751d3474b7
permissions -rw-r--r--
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
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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 __PKCS12_MACDATA_H__
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#define __PKCS12_MACDATA_H__
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#include <e32base.h>
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#include <asn1dec.h>
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#include <hash.h>
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#include <pkcs12kdf.h>
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#include <pkcs7digestinfo.h>
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namespace PKCS12
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{
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/** Default Iteration Count */
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const TInt KDefaultIterationCount = 1;
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/** SHA-1 HMAC 160 bit Key length for key derivation. */
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const TInt KSha1HmacKeyLength = 20;
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/**
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 This class decodes the MacData
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 It has methods to return the PKCS#12 MACDATA structure.
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 */
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class CDecPkcs12MacData : public CBase
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	{
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public:
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    /**
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	 Creates a new PKCS#12MacData object.
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	 @param aMacData contains a PKCS#12 MacData Structure.
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	 @param aAuthSafeData is the ContentData present in the authSafe Sequence
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			of PKCS#12 PFX Structure.
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	 @return A pointer to the newly allocated object.
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	 @leave  KErrArgument if the data is not Pkcs12 macData structure.
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	 */
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	IMPORT_C static CDecPkcs12MacData* NewL(const TDesC8& aMacData, const TDesC8& aAuthSafeData);
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	/**
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	 The DigestInfo present in the MacData.
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	 It has the DigestAlgorithmIdentifier, and the Digest.
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	 @return A reference to the CPKCS7DigestInfo object containing 
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			 the decoded DigestInfo
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	 */
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	IMPORT_C const CPKCS7DigestInfo& DigestInfo() const; 
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	/**
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	 This method returns the MacSalt. 
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	 MacSalt is used as input to the key generation mechanism.
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	 @return A value indicating the MacSalt
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	 */
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	IMPORT_C const TDesC8& MacSalt() const;
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	/**
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	 This method returns the Iteration Count. It is used in creating the key.
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	 @return An integer value indicating the IterationCount.
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	 */
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	IMPORT_C TInt IterationCount() const;
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	/**
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	 This method does the Integrity Check for Password Integrity Mode 
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     by comparing the Digest present in the MacData of the PKCS#12 Structure
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     with the hash generated from the content field of the authenticated Safe,
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     password, the Iteration Count and the Salt present in the MacData.
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	 @param aPassword contains the password to derive the key.
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     @return Returns ETrue, if the Integrity verification passes.
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             Returns EFalse, if the Integrity verification fails.
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     @leave KErrNotSupported if the Pkcs7 digest algorithm is otherthan MD2, 
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     						 MD5 and SHA-1
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     @see   PKCS12KDF, CMessageDigest, 
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     */
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	IMPORT_C TBool VerifyIntegrityL(const TDesC& aPassword) const;
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	/**
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	 Destructor.
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	 */
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	virtual ~CDecPkcs12MacData();
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private:
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	/**
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     This decodes the entire MacData structure.
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     @param aMacData contains a PKCS#12 MacData Structure.
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     @param aAuthSafeData is the ContentData present in the authSafe Sequence
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			of PKCS#12 PFX Structure.
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     @leave  KErrArgument if the data is not Pkcs12 macData structure.
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     @see CPKCS7DigestInfo
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     */
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	void ConstructL(const TDesC8& aMacData, const TDesC8& aAuthSafeData);
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	/**
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	 Constructor.
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	 */
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	CDecPkcs12MacData();
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	/**
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	 Copy Constructor.
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	 @param aDecPkcs12MacData A CDecPkcs12MacData object.
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	 */
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	CDecPkcs12MacData(const CDecPkcs12MacData& aDecPkcs12MacData);
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	/**
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	 Assignment operator.
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	 @param aDecPkcs12MacData A CDecPkcs12MacData object.
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	 @return A reference to CDecPkcs12MacData class.
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	 */
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	CDecPkcs12MacData& operator=(const CDecPkcs12MacData& aDecPkcs12MacData);
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private:
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	/** DigestInfo(PKCS#7 structure) present in the PKCS#12 MacData structure */
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	CPKCS7DigestInfo* iDigestInfo;
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   	/** MacSalt present in the PKCS#12 MacData structure */
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	TPtrC8 iMacSalt;
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	/** Iteration Count present in the PKCS#12 MacData structure */
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	TInt   iIterationCount;
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	/** authSafe sequence present in PKCS#12 PFX structure.*/
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	TPtrC8 iAuthSafeDataPtr;
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	};
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} // namespace PKCS12
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#endif // __PKCS12_MACDATA_H__