keychain/SecureObjectSync/SOSBackupInformation.m

   1 /*
   2  * Copyright (c) 2016 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 //  SOSBackupInformation.c
  26 //  Security
  27 //
  28
  29 #include "SOSBackupInformation.h"
  30 #include "SOSAccountPriv.h"
  31 #include <CoreFoundation/CFNumber.h>
  32 #include <utilities/SecCFWrappers.h>
  33
  34 const CFStringRef kSOSBkpInfoStatus   = CFSTR("BkpInfoStatus");
  35 const CFStringRef kSOSBkpInfoBSKB   = CFSTR("BkpInfoBSKB");
  36 const CFStringRef kSOSBkpInfoRKBG   = CFSTR("BkpInfoRKBG");
  37
  38 CFDictionaryRef SOSBackupInformation(SOSAccountTransaction* txn, CFErrorRef *error) {
  39     CFNumberRef status = NULL;
  40     int ibkpInfoStatus;
  41     __block bool havebskbcontent = false;
  42     SOSAccount *a = txn.account;
  43
  44     CFMutableDictionaryRef retval = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
  45     require_action_quiet(txn && a, errOut, ibkpInfoStatus = noTxnorAcct);
  46     require_action_quiet(retval, errOut, ibkpInfoStatus = noAlloc);
  47     require_action_quiet(txn, errOut, ibkpInfoStatus = noTxnorAcct);
  48
  49     require_action_quiet(a.accountKey && a.accountKeyIsTrusted, errOut, ibkpInfoStatus = noTrustedPubKey);
  50     CFMutableDictionaryRef bskbders = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
  51     SOSAccountForEachRing(a, ^SOSRingRef(CFStringRef name, SOSRingRef ring) {
  52         if(SOSRingGetType(ring) == kSOSRingBackup) {
  53             CFDataRef bskbder = SOSRingGetPayload(ring, NULL);
  54             if(bskbder) CFDictionaryAddValue(bskbders, name, bskbder);
  55             havebskbcontent = true;
  56         } else if(SOSRingGetType(ring) == kSOSRingRecovery) {
  57             CFDataRef rkbgder = SOSRingGetPayload(ring, NULL);
  58             if(rkbgder) CFDictionaryAddValue(retval, kSOSBkpInfoRKBG, rkbgder);
  59         }
  60         return NULL; // we're reporting -  never changing the ring
  61     });
  62     if(havebskbcontent) {
  63         ibkpInfoStatus = noError;
  64         CFDictionaryAddValue(retval, kSOSBkpInfoBSKB, bskbders);
  65     } else {
  66         ibkpInfoStatus = noBSKBs;
  67     }
  68     CFReleaseNull(bskbders);
  69
  70 errOut:
  71     status = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &ibkpInfoStatus);
  72     CFDictionaryAddValue(retval, kSOSBkpInfoStatus, status);
  73     CFReleaseNull(status);
  74     return retval;
  75 }