Security/libsecurity_cdsa_utilities/lib/cssmaclpod.cpp

   1 /*
   2  * Copyright (c) 2000-2004,2006-2007,2011-2012 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   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,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24
  25 //
  26 // cssmaclpod - enhanced PodWrappers for ACL-related CSSM data structures
  27 //
  28 #include <security_cdsa_utilities/cssmaclpod.h>
  29 #include <security_cdsa_utilities/cssmwalkers.h>
  30 #include <cstdarg>
  31
  32
  33 namespace Security {
  34
  35
  36 //
  37 // AclAuthorizationSets
  38 //
  39 AclAuthorizationSet::AclAuthorizationSet(AclAuthorization auth0, AclAuthorization auth, ...)
  40 {
  41         insert(auth0);
  42
  43         va_list args;
  44         va_start(args, auth);
  45         while (auth) {
  46                 insert(auth);
  47                 auth = va_arg(args, AclAuthorization);
  48         }
  49         va_end(args);
  50 }
  51
  52
  53 //
  54 // AclAuthorizationGroups
  55 //
  56 AuthorizationGroup::AuthorizationGroup(const AclAuthorizationSet &auths, Allocator &alloc)
  57 {
  58         NumberOfAuthTags = (uint32)auths.size();
  59         AuthTags = alloc.alloc<CSSM_ACL_AUTHORIZATION_TAG>(NumberOfAuthTags);
  60         copy(auths.begin(), auths.end(), AuthTags);     // happens to be sorted
  61 }
  62
  63 AuthorizationGroup::AuthorizationGroup(CSSM_ACL_AUTHORIZATION_TAG tag, Allocator &alloc)
  64 {
  65         AuthTags = alloc.alloc<CSSM_ACL_AUTHORIZATION_TAG>(1);
  66         AuthTags[0] = tag;
  67         NumberOfAuthTags = 1;
  68 }
  69
  70 void AuthorizationGroup::destroy(Allocator &alloc)
  71 {
  72         alloc.free(AuthTags);
  73 }
  74
  75 bool AuthorizationGroup::contains(CSSM_ACL_AUTHORIZATION_TAG tag) const
  76 {
  77         return find(AuthTags, &AuthTags[NumberOfAuthTags], tag) != &AuthTags[NumberOfAuthTags];
  78 }
  79
  80
  81 AuthorizationGroup::operator AclAuthorizationSet() const
  82 {
  83         return AclAuthorizationSet(AuthTags, &AuthTags[NumberOfAuthTags]);
  84 }
  85
  86 AclEntryPrototype::AclEntryPrototype(const AclOwnerPrototype &proto)
  87 {
  88         memset(this, 0, sizeof(*this));
  89         TypedSubject = proto.subject(); Delegate = proto.delegate();
  90         //@@@ set authorization to "is owner" pseudo-auth? See cssmacl.h
  91 }
  92
  93 void AclEntryPrototype::tag(const char *tagString)
  94 {
  95         if (tagString == NULL)
  96                 EntryTag[0] = '\0';
  97         else if (strlen(tagString) > CSSM_MODULE_STRING_SIZE)
  98                 CssmError::throwMe(CSSM_ERRCODE_INVALID_ACL_ENTRY_TAG);
  99         else
 100                 strcpy(EntryTag, tagString);
 101 }
 102
 103 void AclEntryPrototype::tag(const string &tagString)
 104 {
 105         if (tagString.length() > CSSM_MODULE_STRING_SIZE)
 106                 CssmError::throwMe(CSSM_ERRCODE_INVALID_ACL_ENTRY_TAG);
 107         else
 108                 memcpy(EntryTag, tagString.c_str(), tagString.length() + 1);
 109 }
 110
 111
 112 AclOwnerPrototype *AutoAclOwnerPrototype::make()
 113 {
 114         if (!mAclOwnerPrototype) {
 115                 mAclOwnerPrototype = (AclOwnerPrototype*) mAllocator->malloc(sizeof(AclOwnerPrototype));
 116         new (mAclOwnerPrototype) AclOwnerPrototype;
 117                 mAclOwnerPrototype->clearPod();
 118         }
 119         return mAclOwnerPrototype;
 120 }
 121
 122 AutoAclOwnerPrototype::~AutoAclOwnerPrototype()
 123 {
 124         if (mAllocator)
 125                 DataWalkers::chunkFree(mAclOwnerPrototype, *mAllocator);
 126 }
 127
 128 void
 129 AutoAclOwnerPrototype::allocator(Allocator &allocator)
 130 {
 131         mAllocator = &allocator;
 132 }
 133
 134
 135 void AutoAclEntryInfoList::size(uint32 newSize)
 136 {
 137         assert(mAllocator);
 138         mEntries = mAllocator->alloc<AclEntryInfo>(mEntries, newSize);
 139         for (uint32 n = mCount; n < newSize; n++)
 140                 mEntries[n].clearPod();
 141         mCount = newSize;
 142 }
 143
 144
 145 AclEntryInfo &AutoAclEntryInfoList::at(uint32 ix)
 146 {
 147         if (ix >= mCount)
 148                 size(ix + 1);   // expand vector
 149         return mEntries[ix];
 150 }
 151
 152
 153 void AutoAclEntryInfoList::clear()
 154 {
 155         if (mAllocator)
 156         {
 157                 DataWalkers::ChunkFreeWalker w(*mAllocator);
 158                 for (uint32 ix = 0; ix < mCount; ix++)
 159                         walk(w, mEntries[ix]);
 160                 mAllocator->free(mEntries);
 161                 mEntries = NULL;
 162                 mCount = 0;
 163         }
 164 }
 165
 166 void AutoAclEntryInfoList::allocator(Allocator &allocator)
 167 {
 168         mAllocator = &allocator;
 169 }
 170
 171
 172 void AutoAclEntryInfoList::add(const TypedList &subj, const AclAuthorizationSet &auths, const char *tag /* = NULL */)
 173 {
 174         AclEntryInfo &info = at(size());
 175         info.proto() = AclEntryPrototype(subj);
 176         info.proto().authorization() = AuthorizationGroup(auths, allocator());
 177         info.proto().tag(tag);
 178         info.handle(size());
 179 }
 180
 181 void AutoAclEntryInfoList::addPin(const TypedList &subj, uint32 slot)
 182 {
 183         char tag[20];
 184         snprintf(tag, sizeof(tag), "PIN%d", slot);
 185         add(subj, CSSM_ACL_AUTHORIZATION_PREAUTH(slot), tag);
 186 }
 187
 188 void AutoAclEntryInfoList::addPinState(uint32 slot, uint32 status)
 189 {
 190         char tag[20];
 191         snprintf(tag, sizeof(tag), "PIN%d?", slot);
 192         TypedList subj(allocator(), CSSM_WORDID_PIN,
 193                 new(allocator()) ListElement(slot),
 194                 new(allocator()) ListElement(status));
 195         add(subj, CSSM_WORDID_PIN, tag);
 196 }
 197
 198 void AutoAclEntryInfoList::addPinState(uint32 slot, uint32 status, uint32 count)
 199 {
 200         char tag[20];
 201         snprintf(tag, sizeof(tag), "PIN%d?", slot);
 202         TypedList subj(allocator(), CSSM_WORDID_PIN,
 203                 new(allocator()) ListElement(slot),
 204                 new(allocator()) ListElement(status),
 205                 new(allocator()) ListElement(count));
 206         add(subj, CSSM_WORDID_PIN, tag);
 207 }
 208
 209 uint32 pinFromAclTag(const char *tag, const char *suffix /* = NULL */)
 210 {
 211         if (tag) {
 212                 char format[20];
 213                 snprintf(format, sizeof(format), "PIN%%d%s%%n", suffix ? suffix : "");
 214                 uint32 pin;
 215                 unsigned consumed;
 216                 sscanf(tag, format, &pin, &consumed);
 217                 if (consumed == strlen(tag))    // complete and sufficient
 218                         return pin;
 219         }
 220         return 0;
 221 }
 222
 223 }       // namespace Security