127 lines
4.7 KiB
Objective-C
127 lines
4.7 KiB
Objective-C
//
|
|
// Copyright 2018 Signal Messenger, LLC
|
|
// SPDX-License-Identifier: AGPL-3.0-only
|
|
//
|
|
|
|
#import "OWSVerificationStateSyncMessage.h"
|
|
#import <SignalServiceKit/SignalServiceKit-Swift.h>
|
|
|
|
NS_ASSUME_NONNULL_BEGIN
|
|
|
|
#pragma mark -
|
|
|
|
@interface OWSVerificationStateSyncMessage ()
|
|
|
|
@property (nonatomic, readonly) OWSVerificationState verificationState;
|
|
@property (nonatomic, readonly) NSData *identityKey;
|
|
|
|
@end
|
|
|
|
#pragma mark -
|
|
|
|
@implementation OWSVerificationStateSyncMessage
|
|
|
|
- (instancetype)initWithLocalThread:(TSContactThread *)localThread
|
|
verificationState:(OWSVerificationState)verificationState
|
|
identityKey:(NSData *)identityKey
|
|
verificationForRecipientAddress:(SignalServiceAddress *)address
|
|
transaction:(DBReadTransaction *)transaction
|
|
{
|
|
OWSAssertDebug(identityKey.length == OWSIdentityManagerObjCBridge.identityKeyLength);
|
|
OWSAssertDebug(address.isValid);
|
|
|
|
// we only sync user's marking as un/verified. Never sync the conflicted state, the sibling device
|
|
// will figure that out on it's own.
|
|
OWSAssertDebug(verificationState != OWSVerificationStateNoLongerVerified);
|
|
|
|
self = [super initWithLocalThread:localThread transaction:transaction];
|
|
if (!self) {
|
|
return self;
|
|
}
|
|
|
|
_verificationState = verificationState;
|
|
_identityKey = identityKey;
|
|
_verificationForRecipientAddress = address;
|
|
|
|
// This sync message should be 1-512 bytes longer than the corresponding NullMessage
|
|
// we store this values so the corresponding NullMessage can subtract it from the total length.
|
|
_paddingBytesLength = arc4random_uniform(512) + 1;
|
|
|
|
return self;
|
|
}
|
|
|
|
- (nullable instancetype)initWithCoder:(NSCoder *)coder
|
|
{
|
|
self = [super initWithCoder:coder];
|
|
if (!self) {
|
|
return self;
|
|
}
|
|
|
|
if (_verificationForRecipientAddress == nil) {
|
|
NSString *phoneNumber = [coder decodeObjectForKey:@"verificationForRecipientId"];
|
|
_verificationForRecipientAddress = [SignalServiceAddress legacyAddressWithServiceIdString:nil
|
|
phoneNumber:phoneNumber];
|
|
OWSAssertDebug(_verificationForRecipientAddress.isValid);
|
|
}
|
|
|
|
return self;
|
|
}
|
|
|
|
- (nullable SSKProtoSyncMessageBuilder *)syncMessageBuilderWithTransaction:(DBReadTransaction *)transaction
|
|
{
|
|
// We add the same amount of padding in the VerificationStateSync message and it's corresponding NullMessage so that
|
|
// the sync message is indistinguishable from an outgoing Sent transcript corresponding to the NullMessage. We pad
|
|
// the NullMessage so as to obscure it's content. The sync message (like all sync messages) will be *additionally*
|
|
// padded by the superclass while being sent. The end result is we send a NullMessage of a non-distinct size, and a
|
|
// verification sync which is ~1-512 bytes larger then that.
|
|
OWSAssertDebug(self.paddingBytesLength != 0);
|
|
|
|
AciObjC *verificationForRecipientAci = (AciObjC *)self.verificationForRecipientAddress.serviceIdObjC;
|
|
if (![verificationForRecipientAci isKindOfClass:[AciObjC class]]) {
|
|
OWSFailDebug(@"couldn't get verified aci");
|
|
return nil;
|
|
}
|
|
|
|
SSKProtoVerified *verifiedProto =
|
|
[OWSRecipientIdentity buildVerifiedProtoWithDestinationAci:verificationForRecipientAci
|
|
identityKey:self.identityKey
|
|
verificationState:self.verificationState
|
|
paddingBytesLength:self.paddingBytesLength];
|
|
|
|
SSKProtoSyncMessageBuilder *syncMessageBuilder = [SSKProtoSyncMessage builder];
|
|
[syncMessageBuilder setVerified:verifiedProto];
|
|
return syncMessageBuilder;
|
|
}
|
|
|
|
- (size_t)unpaddedVerifiedLength
|
|
{
|
|
AciObjC *verificationForRecipientAci = (AciObjC *)self.verificationForRecipientAddress.serviceIdObjC;
|
|
if (![verificationForRecipientAci isKindOfClass:[AciObjC class]]) {
|
|
OWSFailDebug(@"couldn't get verified aci");
|
|
return 0;
|
|
}
|
|
|
|
SSKProtoVerified *verifiedProto =
|
|
[OWSRecipientIdentity buildVerifiedProtoWithDestinationAci:verificationForRecipientAci
|
|
identityKey:self.identityKey
|
|
verificationState:self.verificationState
|
|
paddingBytesLength:0];
|
|
|
|
NSError *error;
|
|
NSData *_Nullable verifiedData = [verifiedProto serializedDataAndReturnError:&error];
|
|
if (error || !verifiedData) {
|
|
OWSFailDebug(@"could not serialize protobuf.");
|
|
return 0;
|
|
}
|
|
return verifiedData.length;
|
|
}
|
|
|
|
- (BOOL)isUrgent
|
|
{
|
|
return NO;
|
|
}
|
|
|
|
@end
|
|
|
|
NS_ASSUME_NONNULL_END
|