View source for User:Uroboro

Find me on saurik's [[IRC]] server, [https://twitter.com/uroboro845 Twitter], [http://www.reddit.com/user/uroboro Reddit], [https://github.com/uroboro Github], [http://stackoverflow.com/users/1429562/uroboro StackOverflow] or send me an [mailto:uroboro845+iphonedevwikiorigined@gmail.com email].

Made [https://github.com/uroboro/UnlockEvents UnlockEvents] and [https://github.com/uroboro/FlipNC FlipNC].

If you are looking for notifications within a process, give [https://github.com/uroboro/NotificationExplorer NotificationExplorer] a look.

Some [[NIC]] templates [https://github.com/uroboro/nicTemplates here].

And a repository there: [https://cydia.saurik.com/api/share#?source=https://uroboro.github.io/repo/ uroboro.github.io/repo].

'''DISCLAIMER: All code written in this page is to be considered experimental and untested. The author shall not be held responsible or liable for any undesired consequences, including, but not limited to, data loss, property damage, time travel, the singularity, suffered by you as a result of any error in such code. You also agree that you will not use these code snippets for any purposes prohibited by United States law, including, without limitation, the development, design, manufacture, or production of nuclear, missile, or chemical or biological weapons.'''

== "Interesting" links ==

* [https://developer.apple.com/library/ios/documentation/CoreFoundation/Conceptual/CFMemoryMgmt/Concepts/Ownership.html Object ownership].
* [https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/MemoryMgmt/Articles/MemoryMgmt.html Memory management].
* [https://www.reddit.com/r/jailbreak/comments/3bcwdk/tutorial_lets_secure_ssh_a_bit_more/ Securing SSH] - [https://bitbucket.org/lordscotland/sshconnect/overview SSHConnect].

== Hooking everything ==

While previously it was possible to provide no filter or an empty one, this is no longer the case, both by [[Cydia Substrate]] requiring one and not it being empty. So the solution is based on another requirement that is not very documented: Cydia Substrate will only hook binaries that are linked with [[Security.framework]]. The following filter will suffice for this purpose but please reduce the hooking target of your tweak as much as possible.

{|
|+ com.your.tweak.plist
|- valign="top"
|
{{Collapse|1=<source lang="javascript">{
	Filter = {
		Bundles = (
			"com.apple.Security"
		)
	}
}
</source>|2=NeXTSTEP style}}
||
{{Collapse|1=<source lang="xml">
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Filter</key>
	<dict>
		<key>Bundles</key>
		<array>
			<string>com.apple.Security</string>
		</array>
	</dict>
</dict>
</plist>
</source>|2=XML style}}
|}

== Late hooking ==

=== UI usage ===

If you need to use UI elements, you have to wait until the application is ready.

==== Using callbacks ====

<source lang="objc">
static void notificationCallback(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo) {
	// UI is available, use UIKit here
#if BEFORE_IOS_8
	UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Alert" 
		message:@"This is an alert." 
		delegate:nil 
		cancelButtonTitle:@"I'm ok with this" 
		otherButtonTitles:nil];
	[alert show];			
#else
	UIAlertController * alert = [UIAlertController alertControllerWithTitle:@"Alert"
		message:@"This is an alert."
		preferredStyle:UIAlertControllerStyleAlert];
	[alert addAction:[UIAlertAction actionWithTitle:@"I'm ok with this" 
		style:UIAlertActionStyleDefault
		handler:^(UIAlertAction * action) {}]];
	[[UIWindow keyWindow].rootViewController presentViewController:alert animated:YES completion:^{}];
#endif
}
 
static void * observer = NULL;

%ctor {
	CFNotificationCenterAddObserver(
		CFNotificationCenterGetLocalCenter(),
		&observer,
		notificationCallback,
		(CFStringRef)UIApplicationDidFinishLaunchingNotification,
		NULL,
		CFNotificationSuspensionBehaviorCoalesce
	);
}

// Remove observer upon unloading the dylib
%dtor {
	CFNotificationCenterRemoveObserver(
		CFNotificationCenterGetLocalCenter(),
		&observer,
		(CFStringRef)UIApplicationDidFinishLaunchingNotification,
		NULL
	);
}


</source>

==== Using blocks ====

<source lang="objc">
static id observer;
%ctor {
	observer = [[NSNotificationCenter defaultCenter] addObserverForName:UIApplicationDidFinishLaunchingNotification
		object:nil queue:[NSOperationQueue mainQueue]
		usingBlock:^(NSNotification *notification) {
			// UI is available, use UIKit here
#if BEFORE_IOS_8
			UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Alert" 
				message:@"This is an alert." 
				delegate:nil 
				cancelButtonTitle:@"I'm ok with this" 
				otherButtonTitles:nil];
			[alert show];			
#else
			UIAlertController * alert = [UIAlertController alertControllerWithTitle:@"Alert"
				message:@"This is an alert."
				preferredStyle:UIAlertControllerStyleAlert];
			[alert addAction:[UIAlertAction actionWithTitle:@"I'm ok with this" 
				style:UIAlertActionStyleDefault
				handler:^(UIAlertAction * action) {}]];
			[[UIWindow keyWindow].rootViewController presentViewController:alert animated:YES completion:^{}];
#endif
		}
	];
}

// Remove observer upon unloading the dylib
%dtor {
	[[NSNotificationCenter defaultCenter] removeObserver:observer];
}
</source>

=== Dynamic bundle loading ===

Same applies if a class you want to hook is dynamically loaded by a bundle.

''To do: read [https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man3/dyld.3.html this] and make this procedure more robust.''

==== Using callbacks ====

<source lang="objc">
static void notificationCallback(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo) {
	if ([((NSDictionary *)userInfo)[NSLoadedClasses] containsObject:@"targetClass"]) {
		// Target class has been loaded
	}
}
 
%ctor {
	CFNotificationCenterAddObserver(
		CFNotificationCenterGetLocalCenter(), NULL,
		notificationCallback,
		(CFStringRef)NSBundleDidLoadNotification,
		NULL, CFNotificationSuspensionBehaviorCoalesce);
}
</source>

==== Using blocks ====

<source lang="objc">
static id observer;
%ctor {
	observer = [[NSNotificationCenter defaultCenter] addObserverForName:NSBundleDidLoadNotification
		object:nil queue:[NSOperationQueue mainQueue]
		usingBlock:^(NSNotification *notification) {
			if ([notification.userInfo[NSLoadedClasses] containsObject:@"targetClass"]) {
				// Target class has been loaded
			}
		}
	];
}

//if a destructor existed or you don't need to track the notification anymore
%dtor {
	[[NSNotificationCenter defaultCenter] removeObserver:observer];
}
</source>

== Other Stuff ==

Similar Wanted Pages:

{| class="wikitable"
! Inheritance hierarchy‏‎ !! MIG Subsystems
|-
| [[ApplicationScripting.framework/Inheritance hierarchy‏‎]] || [[ApplicationScripting.framework/MIG subsystem‏]]
|-
| [[AppSupport.framework/Inheritance hierarchy‏‎]] || [[AppSupport.framework/MIG subsystem]]
|-
| [[AudioToolbox.framework/Inheritance hierarchy]] || [[‏AudioToolbox.framework/MIG subsystem]]
|-
| [[AVFoundation.framework/Inheritance hierarchy‏]] || [[AVFoundation.framework/MIG subsystem]]
|-
| [[BackBoardServices.framework/Inheritance hierarchy‏]] || [[BackBoardServices.framework/MIG subsystem‏‎]]
|-
| [[‏BulletinBoard.framework/Inheritance hierarchy‏]] || [[‏BulletinBoard.framework/MIG subsystem]]
|-
| [[ChatKit.framework/Inheritance hierarchy‏‎]] || [[ChatKit.framework/MIG subsystem‏]]
|-
| [[CoreFoundation.framework/Inheritance hierarchy‏‎]] || [[CoreFoundation.framework/MIG subsystem]]
|-
| [[CoreTelephony.framework/Inheritance hierarchy‏‎]] || [[CoreTelephony.framework/MIG subsystem]]
|-
| [[‏Foundation.frameworkInheritance hierarchy‏‎]] || [[‏Foundation.framework/MIG subsystem]]
|-
| [[GraphicsServices.framework/Inheritance hierarchy‏‎]] || [[GraphicsServices.framework/MIG subsystem]]
|-
| [[IH boilerplate/Inheritance hierarchy‏‎]] || [[IH boilerplate/MIG subsystem‏‎]]
|-
| [[IOKit.framework/Inheritance hierarchy‏‎]] || [[IOKit.framework/MIG subsystem]]
|-
| [[IOSurface.framework/Inheritance hierarchy]] || [[‏IOSurface.framework/MIG subsystem]]
|-
| [[MapKit.framework/Inheritance hierarchy]] || [[MapKit.framework/MIG subsystem]]
|-
| [[Message.framework/Inheritance hierarchy]] || [[‏Message.framework/MIG subsystem]]
|-
| [[QuartzCore.framework/Inheritance hierarchy]] || [[QuartzCore.framework/MIG subsystem]]
|-
| [[Preferences.app/Inheritance hierarchy‏]] || [[‏Preferences.app/MIG subsystem]]
|-
| [[Preferences.framework/Inheritance hierarchy]] || [[Preferences.framework/MIG subsystem]]
|-
| [[SpringBoard.app/Inheritance hierarchy]] || [[SpringBoard.app/MIG subsystem]]
|-
| [[SpringBoardServices.framework/Inheritance hierarchy‏]] || [[SpringBoardServices.framework/MIG subsystem]]
|-
| [[TelephonyUI.framework/Inheritance hierarchy]] || [[TelephonyUI.framework/MIG subsystem]]
|-
| [[UIKit.framework/Inheritance hierarchy]] || [[UIKit.framework/MIG subsystem]]
|-
| [[WiFiPicker.servicebundle/Inheritance hierarchy]] || [[‏WiFiPicker.servicebundle/MIG subsystem‏]]
|-
|}

== Test Zone ==

Wondering what looks better:

To "wikitable"...

{| class="wikitable"
|+ com.your.tweak.plist
! NeXTSTEP style !! XML style
|- valign="top"
|
<source lang="javascript">{
	entry = {
		cell = PSSwitchCell;
		defaults = "com.your.tweak";
		label = "Your Tweak";
		key = enabled;
		default = 1;
		icon = "/Applications/Preferences.app/icon-table@2x.png";
		PostNotification = "com.your.tweak/preferences.changed";
	};
}
</source>
||
<source lang="xml">
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>entry</key>
	<dict>
		<key>cell</key>
		<string>PSSwitchCell</string>
		<key>defaults</key>
		<string>com.your.tweak</string>
		<key>label</key>
		<string>Your Tweak</string>
		<key>key</key>
		<string>enabled</string>
		<key>default</key>
		<true/>
		<key>icon</key>
		<string>/Applications/Preferences.app/icon-table@2x.png</string>
		<key>PostNotification</key>
		<string>com.your.tweak/preferences.changed</string>
	</dict>
</dict>
</plist>
</source>
|}

or not to "wikitable"...
{|
|+ com.your.tweak.plist
! NeXTSTEP style !! XML style
|- valign="top"
|
<source lang="javascript">{
	entry = {
		cell = PSSwitchCell;
		defaults = "com.your.tweak";
		label = "Your Tweak";
		key = enabled;
		default = 1;
		icon = "/Applications/Preferences.app/icon-table@2x.png";
		PostNotification = "com.your.tweak/preferences.changed";
	};
}
</source>
||
<source lang="xml">
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>entry</key>
	<dict>
		<key>cell</key>
		<string>PSSwitchCell</string>
		<key>defaults</key>
		<string>com.your.tweak</string>
		<key>label</key>
		<string>Your Tweak</string>
		<key>key</key>
		<string>enabled</string>
		<key>default</key>
		<true/>
		<key>icon</key>
		<string>/Applications/Preferences.app/icon-table@2x.png</string>
		<key>PostNotification</key>
		<string>com.your.tweak/preferences.changed</string>
	</dict>
</dict>
</plist>
</source>
|}

Maybe collapsing?

{|
|+ com.your.tweak.plist
|- valign="top"
|
{{Collapse|1=<source lang="javascript">{
	entry = {
		cell = PSSwitchCell;
		defaults = "com.your.tweak";
		label = "Your Tweak";
		key = enabled;
		default = 1;
		icon = "/Applications/Preferences.app/icon-table@2x.png";
		PostNotification = "com.your.tweak/preferences.changed";
	};
}
</source>|2=NeXTSTEP style}}
||
{{Collapse|1=<source lang="xml">
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>entry</key>
	<dict>
		<key>cell</key>
		<string>PSSwitchCell</string>
		<key>defaults</key>
		<string>com.your.tweak</string>
		<key>label</key>
		<string>Your Tweak</string>
		<key>key</key>
		<string>enabled</string>
		<key>default</key>
		<true/>
		<key>icon</key>
		<string>/Applications/Preferences.app/icon-table@2x.png</string>
		<key>PostNotification</key>
		<string>com.your.tweak/preferences.changed</string>
	</dict>
</dict>
</plist>
</source>|2=XML style}}
|}