LibMobileGestalt.dylib: Difference between revisions

From iPhone Development Wiki

Latest revision as of 16:20, 25 April 2022

libMobileGestalt is a library that can be used to get various system values such as the UDID, disk usage, device version and much more. It is comparable to liblockdown.dylib. See also lockdownd.

MGCopyAnswer

// Common form: MGCopyAnswer(CFStringRef string);
CFStringRef value = MGCopyAnswer(kMGDeviceColor);
NSLog(@"Value: %@", value);
CFRelease(value);

MGGetBoolAnswer (iOS 7+)

// bool MGGetBoolAnswer(CFStringRef key);
bool value = MGGetBoolAnswer(CFSTR("UIProceduralWallpaperCapability"));
NSLog(@"Value: %d", value);

Generate Obfuscated Key

char buffer[256] = { 0 };
snprintf(buffer, sizeof(buffer), "%s%s", "MGCopyAnswer", key);

unsigned char md5Hash[CC_MD5_DIGEST_LENGTH] = { 0 };
CC_MD5(buffer, (CC_LONG)strlen(buffer), md5Hash);

NSData *data = [NSData dataWithBytes:md5Hash length:CC_MD5_DIGEST_LENGTH];
NSString *obfuscatedKey = [[data base64EncodedStringWithOptions:0] substringToIndex:22];

References

External links

Frameworks and Libraries

Public	Foundation • UIKit • CoreFoundation • MapKit • AudioToolbox • QuartzCore • IOKit • CoreText • CoreTelephony • MediaPlayer • ImageIO • AVFoundation • ARKit • AVFAudio • AVKit • Accelerate • Accounts • AdServices • AdSupport • AVRouting • AddressBook • AddressBookUI • AppIntents • AppTrackingTransparency • AssetsLibrary • AudioUnit • AuthenticationServices • AppClip • AutomaticAssessmentConfiguration • BackgroundAssets • BackgroundTasks • BusinessChat • CFNetwork • Callkit • CarKey • CarPlay • CHIP • Charts • ClassKit • ClockKit • CloudKit • ColorSync • Combine • Contacts • ContactsUI • CoreAudio • CoreAudioKit • CoreBluetooth • CoreData • CoreGraphics • CoreHaptics • CoreImage • CoreLocation • CoreLocationUI • CoreMIDI • CoreML • CoreMedia • CoreMotion • CoreNFC • CoreServices • CoreSpotlight • CoreTransferable • CoreVideo • CreateML • CreateMLComponents • CryptoKit • CryptoTokenKit • DataDetection • DeveloperToolsSupport • DeviceActivity • DeviceCheck • DeviceDiscoveryExtension • DriverKit • EventKit • EventKitUI • ExposureNotification • ExtensionFoundation • ExtensionKit • ExternalAccessory • FamilyControls • FileProvider • FileProviderUI • IOSurface

Private	Preferences • AppSupport • Calculate • GraphicsServices • SpringBoardServices • Message • ChatKit • AdminLite • SpringBoardUI • ApplicationScripting • AppleJPEG • MobileIcons • TelephonyUI • MobileWiFi • BackBoardServices • BulletinBoard • MediaRemote • ActorKit.framework/fr • BiometricKit • UserNotificationsUIKit • MPUFoundation • ControlCenterUI • ActorKit • SpringBoardHome • WeatherUI • OnBoardingKit • WorkflowKit • ABMHelper • ACTFramework • AOSKit • APFS • WiFiKit • SpringBoardUIServices • FrontBoardServices • MaterialKit

dylibs	liblockdown • libicucore • libMobileGestalt

Retrieved from "https://iphonedev.wiki/index.php?title=LibMobileGestalt.dylib&oldid=5802"

@@ Line 13: / Line 13: @@
 == MGGetBoolAnswer (iOS 7+) ==
 <source lang=c>
-// CFBooleanRef MGGetBoolAnswer(CFStringRef string);
+// bool MGGetBoolAnswer(CFStringRef key);
-CFBooleanRef value = MGGetBoolAnswer(CFSTR("UIProceduralWallpaperCapability"));
+bool value = MGGetBoolAnswer(CFSTR("UIProceduralWallpaperCapability"));
-NSLog(@"Value: %@", (id)value);
+NSLog(@"Value: %d", value);
-CFRelease(value);
 </source>
-*'''Note''': You are responsible for freeing the value returned by MGCopyAnswer and MGGetBoolAnswer.
+== Generate Obfuscated Key ==
+<source lang=objc>
+char buffer[256] = { 0 };
+snprintf(buffer, sizeof(buffer), "%s%s", "MGCopyAnswer", key);
+unsigned char md5Hash[CC_MD5_DIGEST_LENGTH] = { 0 };
+CC_MD5(buffer, (CC_LONG)strlen(buffer), md5Hash);
+NSData *data = [NSData dataWithBytes:md5Hash length:CC_MD5_DIGEST_LENGTH];
+NSString *obfuscatedKey = [[data base64EncodedStringWithOptions:0] substringToIndex:22];
+</source>
 == References ==
-* Header: https://github.com/Cykey/ios-reversed-headers/blob/master/MobileGestalt/MobileGestalt.h
+* Header: https://github.com/theos/headers/blob/master/MobileGestalt/MobileGestalt.h
+* Example: https://github.com/ProcursusTeam/uikittools-ng/blob/main/mgask.m
+== External links ==
+* [https://blog.timac.org/2017/0124-deobfuscating-libmobilegestalt-keys/ Deobfuscating libMobileGestalt keys]
+* [https://github.com/PoomSmart/MGKeys List of all decrypted keys]
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 [[Category:Dynamic Libraries]]