CODEWITHSUNDEEP
iossmshookjailbreakintercept
Pascal
Pascal

Reputation: 315

IOS Jailbreak How do intercept SMS / Text Messages

I'm currently trying to write an application that intercepts text messages and reacts depending on the content of that message. I tried to hook into _receivedMessage:(struct __CKSMSRecord *)message replace:(BOOL)replace method in the CKSMSService class but this seems not do get called at all.

Could someone please tell me what function/class i have to hook in? I need to intercept the text message before it gets displayed and stored into the database. I'm on IOS 5.0.1.

Any help is truly appreciated.

Upvotes: 12

Views: 9755

Answers (3)

RickJansen
RickJansen

Reputation: 1733

This still works on iOS 7, but I found that you need a slight delay after receiving the kCTMessageReceivedNotification notification. Else you will miss the SMS just received. I use a delay of 0.1 sec, with a [self performSelector .. afterDelay:0.1];

Upvotes: 0

Nate
Nate

Reputation: 31045

Although the poster already accepted rajagp's answer, I'm pretty sure it doesn't do what the question actually asked, on iOS 5. For iOS 5, I'm no longer seeing the message content anymore, although I do get notified that there is a new message.

So, what I did is take rajagp's notification handler for kCTMessageReceivedNotification, and inside it, use the code posted here to actually get the content of the text message, from the SMS database.

Upvotes: 1

rajagp
rajagp

Reputation: 1443

This code snippet should intercept SMS messages- You can extend it for other kinds of notifications. Will work on iOS 5.0.1 as well. Does not work with iMessages though. Link with CoreTelephony framework (there are bunch of private headers there which you'd can class-dump)

#include <dlfcn.h>

#define CORETELPATH "/System/Library/PrivateFrameworks/CoreTelephony.framework/CoreTelephony"
id(*CTTelephonyCenterGetDefault)();

void (*CTTelephonyCenterAddObserver) (id,id,CFNotificationCallback,NSString*,void*,int);


static void telephonyEventCallback(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo)
{
    NSString *notifyname=(NSString *)name;
    if ([notifyname isEqualToString:@"kCTMessageReceivedNotification"])//received SMS
    {
        NSLog(@" SMS Notification Received :kCTMessageReceivedNotification");
        // Do blocking here. 
    }
}

-(void) registerCallback {

 void *handle = dlopen(CORETELPATH, RTLD_LAZY);
    CTTelephonyCenterGetDefault = dlsym(handle, "CTTelephonyCenterGetDefault");
    CTTelephonyCenterAddObserver = dlsym(handle,"CTTelephonyCenterAddObserver");
    dlclose(handle);
    id ct = CTTelephonyCenterGetDefault();

    CTTelephonyCenterAddObserver(
                                 ct, 
                                 NULL, 
                                 telephonyEventCallback,
                                 NULL,
                                 NULL,
                                 CFNotificationSuspensionBehaviorDeliverImmediately);
}

Upvotes: 10

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