OSX/sec/SOSCircle/IDSKeychainSyncingProxy/IDSPersistentState.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 //  IDSPersistentState.m
  26 //  idskeychainsyncingproxy
  27 //
  28
  29 #import <Security/Security.h>
  30 #import <Foundation/NSPropertyList.h>
  31 #import <Foundation/NSArray.h>
  32 #import <Foundation/NSPropertyList.h>
  33 #import <Foundation/NSData.h>
  34 #import <Foundation/NSDictionary.h>
  35 #import <utilities/debugging.h>
  36 #import <utilities/SecFileLocations.h>
  37
  38 #import "IDSPersistentState.h"
  39
  40 #if ! __has_feature(objc_arc)
  41 #error This file must be compiled with ARC. Either turn on ARC for the project or use -fobjc-arc flag
  42 #endif
  43
  44 static CFStringRef kRegistrationFileName = CFSTR("com.apple.security.idskeychainsyncingproxy.unhandledMessages.plist");
  45
  46 @implementation IDSKeychainSyncingProxyPersistentState
  47
  48 + (BOOL)write:(NSURL *)path data:(id)plist error:(NSError **)error
  49 {
  50     if (![NSPropertyListSerialization propertyList: plist isValidForFormat: NSPropertyListXMLFormat_v1_0])
  51     {
  52         secerror("can't save PersistentState as XML");
  53         return false;
  54     }
  55
  56     NSData *data = [NSPropertyListSerialization dataWithPropertyList: plist
  57                                                               format: NSPropertyListXMLFormat_v1_0 options: 0 error: error];
  58     if (data == nil)
  59     {
  60         secerror("error serializing PersistentState to xml: %@", *error);
  61         return false;
  62     }
  63
  64     BOOL writeStatus = [data writeToURL: path options: NSDataWritingAtomic error: error];
  65     if (!writeStatus)
  66         secerror("error writing PersistentState to file: %@", *error);
  67
  68     return writeStatus;
  69 }
  70
  71 + (id)read: (NSURL *)path error:(NSError **)error
  72 {
  73     NSData *data = [NSData dataWithContentsOfURL: path options: 0 error: error];
  74     if (data == nil)
  75     {
  76         secdebug("unhandledmessages", "error reading PersistentState from %@: %@", path, *error);
  77         return nil;
  78     }
  79
  80     // Now the deserializing:
  81
  82     NSPropertyListFormat format;
  83     id plist = [NSPropertyListSerialization propertyListWithData: data
  84                                                          options: NSPropertyListMutableContainersAndLeaves format: &format error: error];
  85
  86     if (plist == nil)
  87         secerror("could not deserialize PersistentState from %@: %@", path, *error);
  88
  89     return plist;
  90 }
  91
  92 + (NSURL *)registrationFileURL
  93 {
  94     return (NSURL *)CFBridgingRelease(SecCopyURLForFileInPreferencesDirectory(kRegistrationFileName));
  95 }
  96
  97 + (NSString *)dictionaryDescription: (NSDictionary *)state
  98 {
  99     NSMutableArray *elements = [NSMutableArray array];
 100     [state enumerateKeysAndObjectsUsingBlock: ^(NSString *key, id obj, BOOL *stop) {
 101         [elements addObject: [key stringByAppendingString: @":"]];
 102         if ([obj isKindOfClass:[NSArray class]]) {
 103             [elements addObject: [(NSArray *)obj componentsJoinedByString: @" "]];
 104         } else {
 105             [elements addObject: [NSString stringWithFormat:@"%@", obj]];
 106         }
 107     }];
 108     return [elements componentsJoinedByString: @" "];
 109 }
 110
 111 + (NSMutableDictionary *)unhandledMessages
 112 {
 113     NSError *error = NULL;
 114     id stateDictionary = [IDSKeychainSyncingProxyPersistentState read:[[self class] registrationFileURL] error:&error];
 115     secdebug("keyregister", "Read registeredKeys: <%@>", [self dictionaryDescription: stateDictionary]);
 116     // Ignore older states with an NSArray
 117     if (![stateDictionary isKindOfClass:[NSDictionary class]])
 118         return NULL;
 119     return [NSMutableDictionary dictionaryWithDictionary:stateDictionary];
 120 }
 121
 122 + (void)setUnhandledMessages: (NSDictionary *)unhandledMessages
 123 {
 124     NSError *error = NULL;
 125     secdebug("keyregister", "Write registeredKeys: <%@>", [self dictionaryDescription: unhandledMessages]);
 126     [IDSKeychainSyncingProxyPersistentState write:[[self class] registrationFileURL] data:unhandledMessages error:&error];
 127 }
 128
 129 @end