X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/5dd5f9ec28f304ca377c42fd7f711d6cf12b90e1..5c19dc3ae3bd8e40a9c028b0deddd50ff337692c:/Security/libsecurity_cdsa_utilities/lib/acl_threshold.h

diff --git a/Security/libsecurity_cdsa_utilities/lib/acl_threshold.h b/Security/libsecurity_cdsa_utilities/lib/acl_threshold.h
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--- a/Security/libsecurity_cdsa_utilities/lib/acl_threshold.h
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-/*
- * Copyright (c) 2000-2004,2006,2011,2014 Apple Inc. All Rights Reserved.
- * 
- * @APPLE_LICENSE_HEADER_START@
- * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-
-
-//
-// acl_threshold - Threshold-based group ACL subjects.
-//
-// This subject type implements threshold (k of n) subjects as per CSSM standard.
-// Subsubjects are stored and evaluated in the order received. Any subsubject
-// is presented with all subsamples of the corresponding threshold sample, but
-// not any other samples possibly present in the credentials. Subsubject evaluation
-// stops as soon as the threshold is satisfied, or as soon as it becomes numerically
-// impossible to satisfy the threshold with future matches.
-// Note that this subject will reject out of hand any threshold sample that
-// contains more than <n> subsamples. This defeats "sample stuffing" attacks
-// where the attacker provides thousands of samples in the hope that some may
-// match by accident. It will however accept threshold samples with fewer than
-// <n> subsamples, as long as there are at least <k> subsamples.
-//
-#ifndef _ACL_THRESHOLD
-#define _ACL_THRESHOLD
-
-#include <security_cdsa_utilities/cssmacl.h>
-#include <vector>
-
-
-namespace Security {
-
-class ThresholdAclSubject : public SimpleAclSubject {
-    typedef ObjectAcl::AclSubjectPointer AclSubjectPointer;
-    typedef vector<AclSubjectPointer> AclSubjectVector;
-public:
-    bool validate(const AclValidationContext &baseCtx, const TypedList &sample) const;
-    CssmList toList(Allocator &alloc) const;
-    
-    ThresholdAclSubject(uint32 n, uint32 k, const AclSubjectVector &subSubjects);
-    
-    void exportBlob(Writer::Counter &pub, Writer::Counter &priv);
-    void exportBlob(Writer &pub, Writer &priv);
-	
-	unsigned count() const { return totalSubjects; }
-	AclSubject *subject(unsigned n) const { return elements[n]; }
-	void add(AclSubject *subject, unsigned beforePosition);
-	
-	IFDUMP(void debugDump() const);
-    
-    class Maker : public AclSubject::Maker {
-    public:
-    	Maker() : AclSubject::Maker(CSSM_ACL_SUBJECT_TYPE_THRESHOLD) { }
-    	ThresholdAclSubject *make(const TypedList &list) const;
-    	ThresholdAclSubject *make(Version, Reader &pub, Reader &priv) const;
-    };
-    
-private:
-    uint32 minimumNeeded;				// number of matches needed
-    uint32 totalSubjects;				// number of subSubjects
-    AclSubjectVector elements;			// sub-subject vector
-
-    template <class Action>
-    void exportBlobForm(Action &pub, Action &priv);
-};
-
-} // namespace Security
-
-
-#endif //_ACL_THRESHOLD