keychain/ot/OTEnsureOctagonKeyConsistency.m

   1 /*
   2  * Copyright (c) 2018 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 #if OCTAGON
  25
  26 #import <utilities/debugging.h>
  27
  28 #import <SecurityFoundation/SecurityFoundation.h>
  29 #import "keychain/ot/OTEnsureOctagonKeyConsistency.h"
  30 #import "keychain/ot/OTClientStateMachine.h"
  31 #import "keychain/ot/OTCuttlefishContext.h"
  32 #import "keychain/ot/OTFetchCKKSKeysOperation.h"
  33 #import "keychain/ot/OTDefines.h"
  34 #import "keychain/ot/OTConstants.h"
  35 #import "keychain/ot/OctagonCKKSPeerAdapter.h"
  36 #import "utilities/debugging.h"
  37 #import <Security/SecKey.h>
  38 #import <Security/SecKeyPriv.h>
  39
  40 #import "keychain/TrustedPeersHelper/TrustedPeersHelperProtocol.h"
  41 #import "keychain/ot/ObjCImprovements.h"
  42 #import <securityd/SOSCloudCircleServer.h>
  43
  44 @interface OTEnsureOctagonKeyConsistency ()
  45 @property OTOperationDependencies* deps;
  46
  47 @property NSOperation* finishOp;
  48 @end
  49
  50 @implementation OTEnsureOctagonKeyConsistency
  51 @synthesize intendedState = _intendedState;
  52
  53 - (instancetype)initWithDependencies:(OTOperationDependencies*)dependencies
  54                        intendedState:(OctagonState*)intendedState
  55                           errorState:(OctagonState*)errorState
  56 {
  57     if((self = [super init])) {
  58         _deps = dependencies;
  59         _intendedState = intendedState;
  60         _nextState = errorState;
  61     }
  62     return self;
  63 }
  64
  65 - (void)groupStart
  66 {
  67     secnotice("octagon-sos", "Beginning ensuring Octagon keys are the same between ");
  68
  69     self.finishOp = [[NSOperation alloc] init];
  70     [self dependOnBeforeGroupFinished:self.finishOp];
  71
  72     if(!self.deps.sosAdapter.sosEnabled) {
  73         self.error = [NSError errorWithDomain:OctagonErrorDomain code:OTErrorSOSAdapter userInfo:@{NSLocalizedDescriptionKey : @"sos adapter not enabled"}];
  74         [self runBeforeGroupFinished:self.finishOp];
  75         return;
  76     }
  77     NSError* sosSelfFetchError = nil;
  78     id<CKKSSelfPeer> sosSelf = [self.deps.sosAdapter currentSOSSelf:&sosSelfFetchError];
  79
  80     if(!sosSelf || sosSelfFetchError) {
  81         secnotice("octagon-sos", "Failed to get the current SOS self: %@", sosSelfFetchError);
  82         self.error = sosSelfFetchError;
  83         [self runBeforeGroupFinished:self.finishOp];
  84         return;
  85     }
  86
  87     secnotice("octagon", "Fetched SOS Self! Fetching Octagon Adapter now.");
  88
  89     NSError* getEgoPeerError = nil;
  90     NSString* octagonPeerID = [self.deps.stateHolder getEgoPeerID:&getEgoPeerError];
  91     if(getEgoPeerError) {
  92         secnotice("octagon", "failed to get peer id: %@", getEgoPeerError);
  93         self.error = getEgoPeerError;
  94         [self runBeforeGroupFinished:self.finishOp];
  95         return;
  96     }
  97
  98     OctagonCKKSPeerAdapter* octagonAdapter = [[OctagonCKKSPeerAdapter alloc] initWithPeerID:octagonPeerID operationDependencies:self.deps];
  99
 100     NSError* fetchSelfPeersError = nil;
 101     CKKSSelves *selfPeers = [octagonAdapter fetchSelfPeers:&fetchSelfPeersError];
 102     if(fetchSelfPeersError) {
 103         secnotice("octagon", "failed to retrieve self peers: %@", fetchSelfPeersError);
 104         self.error = fetchSelfPeersError;
 105         [self runBeforeGroupFinished:self.finishOp];
 106         return;
 107     }
 108
 109     id<CKKSSelfPeer> currentSelfPeer = selfPeers.currentSelf;
 110     if(currentSelfPeer == nil) {
 111         secnotice("octagon", "failed to retrieve current self");
 112         self.error = [NSError errorWithDomain:OctagonErrorDomain code:OTErrorOctagonAdapter userInfo: @{ NSLocalizedDescriptionKey : @"failed to retrieve current self"}];
 113         [self runBeforeGroupFinished:self.finishOp];
 114         return;
 115     }
 116
 117     NSData* octagonSigningKeyData = currentSelfPeer.publicSigningKey.keyData;
 118     NSData* octagonEncryptionKeyData = currentSelfPeer.publicEncryptionKey.keyData;
 119     NSData* sosSigningKeyData = sosSelf.publicSigningKey.keyData;
 120     NSData* sosEncryptionKeyData = sosSelf.publicEncryptionKey.keyData;
 121
 122     if(![octagonSigningKeyData isEqualToData:sosSigningKeyData] || ![octagonEncryptionKeyData isEqualToData:sosEncryptionKeyData]) {
 123         secnotice("octagon", "SOS and Octagon signing keys do NOT match! updating SOS");
 124         NSError* updateError = nil;
 125         [self.deps.sosAdapter updateOctagonKeySetWithAccount:currentSelfPeer error:&updateError];
 126         if(updateError) {
 127             self.error = updateError;
 128             [self runBeforeGroupFinished:self.finishOp];
 129             return;
 130         }
 131     } else {
 132         secnotice("octagon", "SOS and Octagon keys match!");
 133     }
 134     self.nextState = self.intendedState;
 135     [self runBeforeGroupFinished:self.finishOp];
 136 }
 137
 138 @end
 139
 140 #endif // OCTAGON