Security/sec/SOSCircle/CloudKeychainProxy/CKDPersistentState.m

   1 /*
   2  * Copyright (c) 2012-2014 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 //  SOSPersistentState.m
  26 //  ckdxpc
  27 //
  28
  29 #import <Security/Security.h>
  30 #import <Foundation/NSPropertyList.h>
  31 #import <Foundation/NSData.h>
  32 #import <Foundation/NSDictionary.h>
  33 #import <utilities/debugging.h>
  34 #import <utilities/SecFileLocations.h>
  35
  36 #import "CKDPersistentState.h"
  37
  38 #if ! __has_feature(objc_arc)
  39 #error This file must be compiled with ARC. Either turn on ARC for the project or use -fobjc-arc flag
  40 #endif
  41
  42 // may want to have this hold incoming events in file as well
  43
  44 // TODO: Sandbox stuff
  45
  46 static CFStringRef kRegistrationFileName = CFSTR("com.apple.security.cloudkeychainproxy3.keysToRegister.plist");
  47
  48 #define DEBUGSCOPEPW    "keytrace"
  49
  50 @implementation SOSPersistentState
  51
  52 + (BOOL)write:(NSURL *)path data:(id)plist error:(NSError **)error
  53 {
  54     if (![NSPropertyListSerialization propertyList: plist isValidForFormat: NSPropertyListXMLFormat_v1_0])
  55     {
  56         secerror("can't save PersistentState as XML");
  57         return false;
  58     }
  59
  60     NSData *data = [NSPropertyListSerialization dataWithPropertyList: plist
  61         format: NSPropertyListXMLFormat_v1_0 options: 0 error: error];
  62     if (data == nil)
  63     {
  64         secerror("error serializing PersistentState to xml: %@", *error);
  65         return false;
  66     }
  67
  68     BOOL writeStatus = [data writeToURL: path options: NSDataWritingAtomic error: error];
  69     if (!writeStatus)
  70         secerror("error writing PersistentState to file: %@", *error);
  71
  72     return writeStatus;
  73 }
  74
  75 + (id)read: (NSURL *)path error:(NSError **)error
  76 {
  77     NSData *data = [NSData dataWithContentsOfURL: path options: 0 error: error];
  78     if (data == nil)
  79     {
  80         secdebug(DEBUGSCOPEPW, "error reading PersistentState from %@: %@", path, *error);
  81         return nil;
  82     }
  83
  84     // Now the deserializing:
  85
  86     NSPropertyListFormat format;
  87     id plist = [NSPropertyListSerialization propertyListWithData: data
  88         options: NSPropertyListMutableContainersAndLeaves format: &format error: error];
  89
  90     if (plist == nil)
  91         secerror("could not deserialize PersistentState from %@: %@", path, *error);
  92
  93     return plist;
  94 }
  95
  96 + (NSURL *)registrationFileURL
  97 {
  98     return (NSURL *)CFBridgingRelease(SecCopyURLForFileInPreferencesDirectory(kRegistrationFileName));
  99 }
 100
 101 + (NSMutableDictionary *)registeredKeys
 102 {
 103     NSError *error = NULL;
 104     id stateDictionary = [SOSPersistentState read:[[self class] registrationFileURL] error:&error];
 105     secdebug(DEBUGSCOPEPW, "Read persistent stateDictionary: %@", stateDictionary);
 106     // Ignore older states with an NSArray
 107     if (![stateDictionary isKindOfClass:[NSDictionary class]])
 108         return NULL;
 109     return [NSMutableDictionary dictionaryWithDictionary:stateDictionary];
 110 }
 111
 112 + (void)setRegisteredKeys: (NSDictionary *)keysToRegister
 113 {
 114     NSError *error = NULL;
 115     secdebug(DEBUGSCOPEPW, "Write persistent keysToRegister: %@", keysToRegister);
 116     [SOSPersistentState write:[[self class] registrationFileURL] data:keysToRegister error:&error];
 117 }
 118
 119 @end