OTClientVoucherOperation.m   [plain text]

/*
* Copyright (c) 2018 Apple Inc. All Rights Reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/

#if OCTAGON

#import <utilities/debugging.h>

#import "keychain/ot/OTClientVoucherOperation.h"
#import "keychain/ot/OTClientStateMachine.h"
#import "keychain/ot/OTOperationDependencies.h"
#import "keychain/ot/OTFetchCKKSKeysOperation.h"

#import "keychain/TrustedPeersHelper/TrustedPeersHelperProtocol.h"
#import "keychain/ot/ObjCImprovements.h"

@interface OTClientVoucherOperation ()
@property OTOperationDependencies* operationDependencies;
@property NSOperation* finishedOp;
@end

@implementation OTClientVoucherOperation
@synthesize intendedState = _intendedState;

- (instancetype)initWithDependencies:(OTOperationDependencies*)dependencies
intendedState:(OctagonState*)intendedState
errorState:(OctagonState*)errorState
deviceInfo:(nonnull OTDeviceInformation *)deviceInfo
peerID:(nonnull NSString *)peerID
permanentInfo:(nonnull NSData *)permanentInfo
permanentInfoSig:(nonnull NSData *)permanentInfoSig
stableInfo:(nonnull NSData *)stableInfo
stableInfoSig:(nonnull NSData *)stableInfoSig
{
if((self = [super init])) {
_intendedState = intendedState;
_nextState = errorState;

_operationDependencies = dependencies;

self.peerID = peerID;
self.permanentInfo = permanentInfo;
self.permanentInfoSig = permanentInfoSig;
self.stableInfo = stableInfo;
self.stableInfoSig = stableInfoSig;
self.deviceInfo = deviceInfo;
}
return self;
}

- (void)groupStart
{
secnotice("octagon", "creating voucher");

self.finishedOp = [[NSOperation alloc] init];
[self dependOnBeforeGroupFinished:self.finishedOp];

WEAKIFY(self);

// Acquire the CKKS TLKs to pass in
OTFetchCKKSKeysOperation* fetchKeysOp = [[OTFetchCKKSKeysOperation alloc] initWithDependencies:self.operationDependencies
refetchNeeded:NO];
[self runBeforeGroupFinished:fetchKeysOp];

CKKSResultOperation* proceedWithKeys = [CKKSResultOperation named:@"vouch-with-keys"
withBlock:^{
STRONGIFY(self);
[self proceedWithKeys:fetchKeysOp.viewKeySets];
}];

[proceedWithKeys addDependency:fetchKeysOp];
[self runBeforeGroupFinished:proceedWithKeys];
}

- (void)proceedWithKeys:(NSArray<CKKSKeychainBackedKeySet*>*)viewKeySets
{
WEAKIFY(self);

secnotice("octagon", "vouching with %d keysets", (int)viewKeySets.count);

[self.operationDependencies.cuttlefishXPCWrapper vouchWithContainer:self.deviceInfo.containerName
context:self.deviceInfo.contextID
peerID:self.peerID
permanentInfo:self.permanentInfo
permanentInfoSig:self.permanentInfoSig
stableInfo:self.stableInfo
stableInfoSig:self.stableInfoSig
ckksKeys:viewKeySets
reply:^(NSData * _Nullable voucher,
NSData * _Nullable voucherSig,
NSError * _Nullable error)
{
STRONGIFY(self);
if(error){
secerror("octagon: Error preparing voucher: %@", error);
self.error = error;
}else{
self.voucher = voucher;
self.voucherSig = voucherSig;
self.nextState = self.intendedState;
}
[self runBeforeGroupFinished:self.finishedOp];
}];
}

@end

#endif // OCTAGON