8e4f2ca0ed
Sketch out model changes for quoted replies. Sketch out quoted reply input preview. Send quoted messages protos. Update models to reflect quoted messages. Rework interaction initializers. Rework interaction initializers. Add debug UI methods for generating quoted reply variations. Add debug UI methods for generating quoted reply variations.
85 lines
2.8 KiB
Objective-C
85 lines
2.8 KiB
Objective-C
//
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// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
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//
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#import "OWSOutgoingNullMessage.h"
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#import "Cryptography.h"
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#import "NSDate+OWS.h"
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#import "OWSSignalServiceProtos.pb.h"
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#import "OWSVerificationStateSyncMessage.h"
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#import "TSContactThread.h"
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NS_ASSUME_NONNULL_BEGIN
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@interface OWSOutgoingNullMessage ()
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@property (nonatomic, readonly) OWSVerificationStateSyncMessage *verificationStateSyncMessage;
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@end
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#pragma mark -
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@implementation OWSOutgoingNullMessage
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- (instancetype)initWithContactThread:(TSContactThread *)contactThread
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verificationStateSyncMessage:(OWSVerificationStateSyncMessage *)verificationStateSyncMessage
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{
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self = [super initOutgoingMessageWithTimestamp:[NSDate ows_millisecondTimeStamp]
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inThread:contactThread
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messageBody:nil
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attachmentIds:[NSMutableArray new]
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expiresInSeconds:0
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expireStartedAt:0
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isVoiceMessage:NO
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groupMetaMessage:TSGroupMessageNone
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quotedMessage:nil];
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if (!self) {
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return self;
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}
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_verificationStateSyncMessage = verificationStateSyncMessage;
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return self;
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}
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#pragma mark - override TSOutgoingMessage
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- (NSData *)buildPlainTextData:(SignalRecipient *)recipient
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{
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OWSSignalServiceProtosContentBuilder *contentBuilder = [OWSSignalServiceProtosContentBuilder new];
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OWSSignalServiceProtosNullMessageBuilder *nullMessageBuilder = [OWSSignalServiceProtosNullMessageBuilder new];
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NSUInteger contentLength = self.verificationStateSyncMessage.unpaddedVerifiedLength;
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OWSAssert(self.verificationStateSyncMessage.paddingBytesLength > 0);
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// We add the same amount of padding in the VerificationStateSync message and it's coresponding NullMessage so that
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// the sync message is indistinguishable from an outgoing Sent transcript corresponding to the NullMessage. We pad
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// the NullMessage so as to obscure it's content. The sync message (like all sync messages) will be *additionally*
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// padded by the superclass while being sent. The end result is we send a NullMessage of a non-distinct size, and a
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// verification sync which is ~1-512 bytes larger then that.
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contentLength += self.verificationStateSyncMessage.paddingBytesLength;
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OWSAssert(contentLength > 0)
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nullMessageBuilder.padding = [Cryptography generateRandomBytes:contentLength];
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contentBuilder.nullMessage = [nullMessageBuilder build];
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return [contentBuilder build].data;
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}
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- (BOOL)shouldSyncTranscript
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{
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return NO;
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}
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- (BOOL)shouldBeSaved
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{
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return NO;
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}
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@end
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NS_ASSUME_NONNULL_END
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