cryptoservices/certificateandkeymgmt/pkixcertbase/pkixCons.h
author Santosh V Patil <santosh.v.patil@nokia.com>
Fri, 14 Aug 2009 22:14:14 +0530
changeset 4 8e4b1aa36db9
parent 0 2c201484c85f
child 8 35751d3474b7
permissions -rw-r--r--
Added python script to import Mozilla certificates into Symbian OS (Bug 287). Also added the Mozilla certificate store file.
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/*
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* Copyright (c) 1998-2009 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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* TPKIXConstraint and TPKIXPolicyConstraint implementations
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*
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*/
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/**
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 @file 
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 @internalTechnology
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*/
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#if !defined (__PKIXCONS_H__)
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#define __PKIXCONS_H__
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#include <e32std.h>
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#include <x509cert.h>
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#include <x509certchain.h>
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#include <x509certext.h>
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#include <x509gn.h>
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#include <pkixcertchain.h>
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#include "pkixcertstate.h"
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class TPKIXConstraint
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	{
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protected:
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	TPKIXConstraint(CPKIXValidationState& aState, CPKIXValidationResultBase& aResult);
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	void Remove(CArrayPtrFlat<CX509CertExtension>& aCriticalExtensions, const TDesC& aOID);
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	CPKIXValidationState& iState;
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	CPKIXValidationResultBase& iResult;
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	};
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/*
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Certificate policies are processed in the following way:
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Inputs:
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------
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user-constrained policy set: set of policies deemed acceptable to client of PKIXCert (relying party)
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Variables:
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---------
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UP: user-constrained-policy set: initialised by user, or set to empty (='any-policy', since empty is not a sensible value)
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AP: authority-constrained policy set: set of policies deemed acceptable to issuing authority, initialised to 'any-policy'
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MP: mapped policy set: set of mapped policies, initialised to empty
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explicit policy:	integer indicating position of first certificate in path where explicit policy ID is required.
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					intialised to n+1 where n=length of chain
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policy mapping:		integer indicating position of last certificate in path where policy mapping is allowed
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					intialised to n+1 where n=length of chain
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Processing:
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----------
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For each certificate in chain, where certificate is at i in the chain (root being 1, ee cert being n):
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-if explicit policy <= i, a policy ID in cert shall be in UP
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-if policy mapping <= i, policy may not be mapped
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-if the cert doesn't contain a policy extension, then:
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	-if AP = any, AP is unchanged
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	-else AP is set to empty
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-if the cert contains a policy extension then 
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	-AP is set to the intersection of AP and CP
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	-any mapped policies occurring in CP are added to AP
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-if we can do mapping, then
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	-if AP = any then 
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		-all the 'subject' policies are added to MP
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		-for all mapped policies, if the 'issuer' policy is in UP then the 'subject' policy is added to UP
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	-if AP != any then
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		-for all mapped policies, 
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			-if the issuer policy is in AP then
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				-the subject policy is added to MP
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				-if the issuer policy is in UP then the subject policy is added to UP
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At the end of the chain,
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-if UP = any then we pass
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-if UP != any then 
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	-if AP = any then we fail
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	-otherwise we intersect AP and UP; if the result is empty then we fail
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It is not entirely clear that this is a faithful implementation of the algorithm described in RFC 2459 
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section 6.1, because the spec is a little ambiguous here. Additionally, this section of the spec is 
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currently undergoing revision (true as of 12 April 2000). So when it's finished being revised, the code
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here should be revised to reflect the spec.
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However, for the test vectors that I have at this time this appears to give sensible results.
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*/
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class TPKIXPolicyConstraint : public TPKIXConstraint
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	{
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public:
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	TPKIXPolicyConstraint(CPKIXValidationState& aState, CPKIXValidationResultBase& aResult);
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	void CheckCertPoliciesL(const CX509Certificate& aCert);
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	void UpdatePolicyConstraintsL(const CX509Certificate& aCert);
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	void FinishPolicyCheckL();
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private:
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	void IntersectCertPoliciesL(const CX509CertPoliciesExt& aPolicyExt);
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	void UpdateConstraint(const TX509PolicyConstraint& aConstraint, TInt& aCountdown);
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	CArrayPtrFlat<CX509CertPolicyInfo>* IntersectionLC(	const CArrayPtrFlat<CX509CertPolicyInfo>& aFirst,
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														const CArrayPtrFlat<CX509CertPolicyInfo>& aSecond);
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	TBool PolicyIsPresentL(	const CArrayPtrFlat<CX509CertPolicyInfo>& aPolicies, 
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							const CArrayPtr<HBufC>& aAcceptablePolicies);
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	static void CleanupPolicyInfoArray(TAny* aPolicies);
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	};
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class TPKIXNameConstraint : public TPKIXConstraint
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	{
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public:
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	TPKIXNameConstraint(CPKIXValidationState& aState, CPKIXValidationResultBase& aResult);
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	void CheckNameConstraintsL(	const CX509Certificate& aCert);
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	void UpdateNameConstraintsL(const CX509Certificate& aCert);
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private:
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	TBool NameIsPresentL(const CX500DistinguishedName& aSubject,
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						const CArrayPtrFlat<CX500DistinguishedName>& aSubtrees);
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	TBool NameIsPresent(const CX509DomainName& aSubject,
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						const CArrayPtrFlat<CX509DomainName>& aSubtrees);
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	TBool NameIsPresent(const CX509IPAddress& aSubject,
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						const CArrayPtrFlat<CX509IPSubnetMask>& aSubtrees);
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	};
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class TPKIXBasicConstraint : public TPKIXConstraint
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	{
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public:
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	TPKIXBasicConstraint(CPKIXValidationState& aState, CPKIXValidationResultBase& aResult);
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	void CheckCertSubjectTypeL(const CX509Certificate& aCert);
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	void UpdatePathLengthConstraintsL(const CX509Certificate& aCert);
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private:
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	};
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class TPKIXKeyUsageConstraint : public TPKIXConstraint
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	{
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public:
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	TPKIXKeyUsageConstraint(CPKIXValidationState& aState, CPKIXValidationResultBase& aResult);
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	void CheckKeyUsageL(const CX509Certificate& aCert);
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private:
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	};
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#endif