securityd/src/acl_partition.cpp

   1 /*
   2  * Copyright (c) 2000-2006,2011-2012,2014 Apple Inc. All Rights Reserved.
   3  *
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   6  * This file contains Original Code and/or Modifications of Original Code
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   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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  18  * Please see the License for the specific language governing rights and
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  23
  24
  25 //
  26 // acl_partition - partition identifier store
  27 //
  28 // This ACL subject stores keychain partition data.
  29 // When evaluated, it always fails. Securityd explicitly
  30 //
  31 #include "acl_partition.h"
  32 #include <security_cdsa_utilities/cssmwalkers.h>
  33 #include <security_cdsa_utilities/cssmlist.h>
  34 #include <algorithm>
  35
  36 using namespace DataWalkers;
  37
  38
  39 //
  40 // The dictionaryPayload is the payload blob interpreted as an XML dictionary, or NULL if that didn't work.
  41 //
  42 CFDictionaryRef PartitionAclSubject::createDictionaryPayload() const
  43 {
  44         return makeCFDictionaryFrom(CFTempData(this->payload));
  45 }
  46
  47 void PartitionAclSubject::setDictionaryPayload(Allocator& alloc, CFDictionaryRef dict)
  48 {
  49         CFRef<CFDataRef> xmlData = makeCFData(dict);
  50         this->payload = CssmAutoData(alloc, CFDataGetBytePtr(xmlData), CFDataGetLength(xmlData));
  51 }
  52
  53
  54 //
  55 // The partition subject matches nothing, no matter how pretty.
  56 //
  57 bool PartitionAclSubject::validates(const AclValidationContext &) const
  58 {
  59         return false;
  60 }
  61
  62
  63 //
  64 // The list form has a simple CssmData payload.
  65 //
  66 CssmList PartitionAclSubject::toList(Allocator &alloc) const
  67 {
  68         return TypedList(Allocator::standard(), CSSM_ACL_SUBJECT_TYPE_PARTITION,
  69                                          new(alloc) ListElement(alloc, this->payload));
  70 }
  71
  72
  73 //
  74 // Set payload from list input.
  75 //
  76 PartitionAclSubject *PartitionAclSubject::Maker::make(const TypedList &list) const
  77 {
  78         Allocator &alloc = Allocator::standard();
  79         if (list.length() != 2)
  80                 CssmError::throwMe(CSSM_ERRCODE_INVALID_ACL_SUBJECT_VALUE);
  81         ListElement *payloadItem;
  82         crack(list, 1, &payloadItem, CSSM_LIST_ELEMENT_DATUM);
  83         return new PartitionAclSubject(alloc, payloadItem->data());
  84 }
  85
  86
  87 //
  88 // A PartitionAclSubject is a "null" subject that contains out of band data
  89 // for further security evaluation. When evaluated as an ACL subject, it always fails.
  90 //
  91 PartitionAclSubject *PartitionAclSubject::Maker::make(Version, Reader &pub, Reader &) const
  92 {
  93         Allocator& alloc = Allocator::standard();
  94         const void* data; size_t length;
  95         pub.countedData(data, length);
  96         CssmAutoData payloadData(alloc, data, length);
  97         return new PartitionAclSubject(alloc, payloadData);
  98 }
  99
 100
 101 //
 102 // Export to blob form.
 103 // This simply writes the smallest form consistent with the heuristic above.
 104 //
 105 void PartitionAclSubject::exportBlob(Writer::Counter &pub, Writer::Counter &)
 106 {
 107         pub.countedData(this->payload);
 108 }
 109
 110 void PartitionAclSubject::exportBlob(Writer &pub, Writer &)
 111 {
 112         pub.countedData(this->payload);
 113 }