mdc v14

AltStoreCore/Extensions/UserDefaults+AltStore.swift

@@ -10,8 +10,7 @@ import Foundation
 
 import Roxas
 
-public extension UserDefaults
-{
+public extension UserDefaults {
     static let shared: UserDefaults = {
         guard let appGroup = Bundle.main.appGroups.first else { return .standard }
         
@@ -43,25 +42,27 @@ public extension UserDefaults
     
     @NSManaged var trustedSourceIDs: [String]?
     
+    @nonobjc
     var activeAppsLimit: Int? {
         get {
             return self._activeAppsLimit?.intValue
         }
         set {
-            if let value = newValue
-            {
+            if let value = newValue {
                 self._activeAppsLimit = NSNumber(value: value)
             }
-            else
-            {
+            else {
                 self._activeAppsLimit = nil
             }
         }
     }
+
     @NSManaged @objc(activeAppsLimit) private var _activeAppsLimit: NSNumber?
-    
-    class func registerDefaults()
-    {
+
+    @NSManaged var enableMacDirtyCowExploit: Bool
+    @NSManaged var isMacDirtyCowSupported: Bool
+
+    class func registerDefaults() {
         let ios13_5 = OperatingSystemVersion(majorVersion: 13, minorVersion: 5, patchVersion: 0)
         let isLegacyDeactivationSupported = !ProcessInfo.processInfo.isOperatingSystemAtLeast(ios13_5)
         let activeAppLimitIncludesExtensions = !ProcessInfo.processInfo.isOperatingSystemAtLeast(ios13_5)
@@ -69,15 +70,31 @@ public extension UserDefaults
         let ios14 = OperatingSystemVersion(majorVersion: 14, minorVersion: 0, patchVersion: 0)
         let localServerSupportsRefreshing = !ProcessInfo.processInfo.isOperatingSystemAtLeast(ios14)
         
+        let ios16 = OperatingSystemVersion(majorVersion: 16, minorVersion: 0, patchVersion: 0)
+        let ios16_2 = OperatingSystemVersion(majorVersion: 16, minorVersion: 2, patchVersion: 0)
+        let ios15_7_2 = OperatingSystemVersion(majorVersion: 15, minorVersion: 7, patchVersion: 2)
+
+        // MacDirtyCow supports iOS 14.0 - 15.7.1 OR 16.0 - 16.1.2
+        let isMacDirtyCowSupported =
+            (ProcessInfo.processInfo.isOperatingSystemAtLeast(ios14) && !ProcessInfo.processInfo.isOperatingSystemAtLeast(ios15_7_2)) ||
+            (ProcessInfo.processInfo.isOperatingSystemAtLeast(ios16) && !ProcessInfo.processInfo.isOperatingSystemAtLeast(ios16_2))
+
         let defaults = [
             #keyPath(UserDefaults.isBackgroundRefreshEnabled): true,
             #keyPath(UserDefaults.isLegacyDeactivationSupported): isLegacyDeactivationSupported,
             #keyPath(UserDefaults.activeAppLimitIncludesExtensions): activeAppLimitIncludesExtensions,
             #keyPath(UserDefaults.localServerSupportsRefreshing): localServerSupportsRefreshing,
-            #keyPath(UserDefaults.requiresAppGroupMigration): true
+            #keyPath(UserDefaults.requiresAppGroupMigration): true,
+            #keyPath(UserDefaults.enableMacDirtyCowExploit): true,
+            #keyPath(UserDefaults.isMacDirtyCowSupported): isMacDirtyCowSupported,
         ]
         
         UserDefaults.standard.register(defaults: defaults)
         UserDefaults.shared.register(defaults: defaults)
+        
+        if !isMacDirtyCowSupported {
+            // Disable enableMacDirtyCowExploit if running iOS version that doesn't support MacDirtyCow.
+            UserDefaults.standard.enableMacDirtyCowExploit = false
+        }
     }
 }

AltStoreCore/Model/InstalledApp.swift

@@ -13,7 +13,21 @@ import AltSign
 import SemanticVersion
 
 // Free developer accounts are limited to only 3 active sideloaded apps at a time as of iOS 13.3.1.
-public let ALTActiveAppsLimit = 99999
+public extension InstalledApp
+{
+    static var freeAccountActiveAppsLimit: Int
+    {
+        if UserDefaults.standard.enableMacDirtyCowExploit && UserDefaults.standard.isMacDirtyCowSupported
+        {
+            return 99999
+        }
+        else
+        {
+            // Free developer accounts are limited to only 3 active sideloaded apps at a time as of iOS 13.3.1.
+            return 3
+        }
+    }
+}
 
 public protocol InstalledAppProtocol: Fetchable
 {

AltStoreCore/Model/Migrations/Policies/InstalledAppPolicy.swift

@@ -6,8 +6,8 @@
 //  Copyright © 2020 Riley Testut. All rights reserved.
 //
 
-import CoreData
 import AltSign
+import CoreData
 
 @objc(InstalledAppToInstalledAppMigrationPolicy)
 class InstalledAppToInstalledAppMigrationPolicy: NSEntityMigrationPolicy
@@ -50,7 +50,7 @@ class InstalledAppToInstalledAppMigrationPolicy: NSEntityMigrationPolicy
             
             // We can assume there is an active app limit,
             // but will confirm next time user authenticates.
-            UserDefaults.standard.activeAppsLimit = ALTActiveAppsLimit
+            UserDefaults.standard.activeAppsLimit = InstalledApp.freeAccountActiveAppsLimit
         }
         
         return NSNumber(value: isActive)