[AltServer] Adds method to fetch installed apps on devices

AltServer/Devices/ALTDeviceManager.h

@@ -13,6 +13,8 @@
 @class ALTNotificationConnection;
 @class ALTDebugConnection;
 
+@class ALTInstalledApp;
+
 NS_ASSUME_NONNULL_BEGIN
 
 extern NSNotificationName const ALTDeviceManagerDeviceDidConnectNotification NS_SWIFT_NAME(deviceManagerDeviceDidConnect);
@@ -41,6 +43,9 @@ extern NSNotificationName const ALTDeviceManagerDeviceDidDisconnectNotification
 - (void)installDeveloperDiskImageAtURL:(NSURL *)diskURL signatureURL:(NSURL *)signatureURL toDevice:(ALTDevice *)device
                      completionHandler:(void (^)(BOOL success, NSError *_Nullable error))completionHandler;
 
+/* Apps */
+- (void)fetchInstalledAppsOnDevice:(ALTDevice *)altDevice completionHandler:(void (^)(NSSet<ALTInstalledApp *> *_Nullable installedApps, NSError *_Nullable error))completionHandler;
+
 /* Connections */
 - (void)startWiredConnectionToDevice:(ALTDevice *)device completionHandler:(void (^)(ALTWiredConnection *_Nullable connection, NSError *_Nullable error))completionHandler;
 - (void)startNotificationConnectionToDevice:(ALTDevice *)device completionHandler:(void (^)(ALTNotificationConnection *_Nullable connection, NSError *_Nullable error))completionHandler;

AltServer/Devices/ALTDeviceManager.mm

@@ -16,6 +16,10 @@
 #import "NSError+ALTServerError.h"
 #import "NSError+libimobiledevice.h"
 
+#import <AppKit/AppKit.h>
+#import <UserNotifications/UserNotifications.h>
+#import "AltServer-Swift.h"
+
 #include <libimobiledevice/libimobiledevice.h>
 #include <libimobiledevice/lockdown.h>
 #include <libimobiledevice/installation_proxy.h>
@@ -38,7 +42,9 @@ NSNotificationName const ALTDeviceManagerDeviceDidDisconnectNotification = @"ALT
 @property (nonatomic, readonly) NSMutableDictionary<NSUUID *, void (^)(NSError *)> *deletionCompletionHandlers;
 
 @property (nonatomic, readonly) NSMutableDictionary<NSUUID *, NSProgress *> *installationProgress;
+
 @property (nonatomic, readonly) dispatch_queue_t installationQueue;
+@property (nonatomic, readonly) dispatch_queue_t devicesQueue;
 
 @property (nonatomic, readonly) NSMutableSet<ALTDevice *> *cachedDevices;
 
@@ -66,7 +72,9 @@ NSNotificationName const ALTDeviceManagerDeviceDidDisconnectNotification = @"ALT
         _deletionCompletionHandlers = [NSMutableDictionary dictionary];
         
         _installationProgress = [NSMutableDictionary dictionary];
-        _installationQueue = dispatch_queue_create("com.rileytestut.AltServer.InstallationQueue", DISPATCH_QUEUE_SERIAL);
+        
+        _installationQueue = dispatch_queue_create("com.rileytestut.AltServer.Installation", DISPATCH_QUEUE_SERIAL);
+        _devicesQueue = dispatch_queue_create("com.rileytestut.AltServer.Devices", DISPATCH_QUEUE_CONCURRENT_WITH_AUTORELEASE_POOL);
         
         _cachedDevices = [NSMutableSet set];
     }
@@ -1195,6 +1203,113 @@ NSNotificationName const ALTDeviceManagerDeviceDidDisconnectNotification = @"ALT
     });
 }
 
+#pragma mark - Apps -
+
+- (void)fetchInstalledAppsOnDevice:(ALTDevice *)altDevice completionHandler:(void (^)(NSSet<ALTInstalledApp *> *_Nullable installedApps, NSError *_Nullable error))completionHandler
+{
+    __block idevice_t device = NULL;
+    __block instproxy_client_t ipc = NULL;
+    __block lockdownd_client_t client = NULL;
+    __block lockdownd_service_descriptor_t service = NULL;
+    __block plist_t options = NULL;
+        
+    void (^finish)(NSSet<ALTInstalledApp *> *, NSError *) = ^(NSSet<ALTInstalledApp *> *installedApps, NSError *error) {
+        if (error != nil) {
+            NSLog(@"Notification Connection Error: %@", error);
+        }
+        
+        if (options) {
+            instproxy_client_options_free(options);
+        }
+        
+        if (service) {
+            lockdownd_service_descriptor_free(service);
+        }
+        
+        if (client) {
+            lockdownd_client_free(client);
+        }
+                
+        if (ipc) {
+            instproxy_client_free(ipc);
+        }
+        
+        if (device) {
+            idevice_free(device);
+        }
+        
+        completionHandler(installedApps, error);
+    };
+    
+    // Don't use installationQueue since this operation can potentially take a very long time and will block other operations.
+    // dispatch_async(self.installationQueue, ^{
+    dispatch_async(self.devicesQueue, ^{
+        /* Find Device */
+        if (idevice_new_with_options(&device, altDevice.identifier.UTF8String, (enum idevice_options)((int)IDEVICE_LOOKUP_NETWORK | (int)IDEVICE_LOOKUP_USBMUX)) != IDEVICE_E_SUCCESS)
+        {
+            return finish(nil, [NSError errorWithDomain:AltServerErrorDomain code:ALTServerErrorDeviceNotFound userInfo:nil]);
+        }
+        
+        if (LOCKDOWN_E_SUCCESS != lockdownd_client_new_with_handshake(device, &client, "AltServer"))
+        {
+            return finish(nil, [NSError errorWithDomain:AltServerErrorDomain code:ALTServerErrorConnectionFailed userInfo:nil]);
+        }
+        
+        if ((lockdownd_start_service(client, "com.apple.mobile.installation_proxy", &service) != LOCKDOWN_E_SUCCESS) || !service)
+        {
+            return finish(nil, [NSError errorWithDomain:AltServerErrorDomain code:ALTServerErrorConnectionFailed userInfo:nil]);
+        }
+        
+        instproxy_error_t err = instproxy_client_new(device, service, &ipc);
+        if (err != INSTPROXY_E_SUCCESS)
+        {
+            return finish(nil, [NSError errorWithInstallationProxyError:err device:altDevice]);
+        }
+        
+        options = instproxy_client_options_new();
+        instproxy_client_options_add(options, "ApplicationType", "User", NULL);
+        
+        plist_t plist = NULL;
+        err = instproxy_browse(ipc, options, &plist);
+        if (err != INSTPROXY_E_SUCCESS)
+        {
+            return finish(nil, [NSError errorWithInstallationProxyError:err device:altDevice]);
+        }
+        
+        char *plistXML = NULL;
+        uint32_t length = 0;
+        plist_to_xml(plist, &plistXML, &length);
+        
+        NSData *plistData = [@(plistXML) dataUsingEncoding:NSUTF8StringEncoding];
+        free(plistXML);
+        plist_free(plist);
+        
+        NSError *error = nil;
+        NSArray *appDictionaries = [NSPropertyListSerialization propertyListWithData:plistData options:0 format:nil error:&error];
+        if (appDictionaries == nil)
+        {
+            return finish(nil, error);
+        }
+        
+        NSMutableSet *installedApps = [NSMutableSet set];
+        for (NSDictionary *appInfo in appDictionaries)
+        {
+            if (appInfo[@"ALTBundleIdentifier"] != nil)
+            {
+                // Only return apps installed with AltStore.
+                
+                ALTInstalledApp *installedApp = [[ALTInstalledApp alloc] initWithDictionary:appInfo];
+                if (installedApp)
+                {
+                    [installedApps addObject:installedApp];
+                }
+            }
+        }
+        
+        finish(installedApps, nil);
+    });
+}
+
 #pragma mark - Connections -
 
 - (void)startWiredConnectionToDevice:(ALTDevice *)altDevice completionHandler:(void (^)(ALTWiredConnection * _Nullable, NSError * _Nullable))completionHandler

AltServer/InstalledApp.swift

@@ -0,0 +1,29 @@
+//
+//  InstalledApp.swift
+//  AltServer
+//
+//  Created by Riley Testut on 5/25/21.
+//  Copyright © 2021 Riley Testut. All rights reserved.
+//
+
+import Foundation
+
+@objc(ALTInstalledApp) @objcMembers
+class InstalledApp: NSObject, MenuDisplayable
+{
+    let name: String
+    let bundleIdentifier: String
+    let executableName: String
+    
+    init?(dictionary: [String: Any])
+    {
+        guard let name = dictionary[kCFBundleNameKey as String] as? String,
+              let bundleIdentifier = dictionary[kCFBundleIdentifierKey as String] as? String,
+              let executableName = dictionary[kCFBundleExecutableKey as String] as? String
+        else { return nil }
+        
+        self.name = name
+        self.bundleIdentifier = bundleIdentifier
+        self.executableName = executableName
+    }
+}

AltStore.xcodeproj/project.pbxproj

@@ -199,6 +199,7 @@
 		BF8CAE4E248AEABA004D6CCE /* UIDevice+Jailbreak.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF8CAE4D248AEABA004D6CCE /* UIDevice+Jailbreak.swift */; };
 		BF8F69C222E659F700049BA1 /* AppContentViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF8F69C122E659F700049BA1 /* AppContentViewController.swift */; };
 		BF8F69C422E662D300049BA1 /* AppViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF8F69C322E662D300049BA1 /* AppViewController.swift */; };
+		BF904DEA265DAE9A00E86C2A /* InstalledApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF904DE9265DAE9A00E86C2A /* InstalledApp.swift */; };
 		BF989171250AABF4002ACF50 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = BF989170250AABF4002ACF50 /* Assets.xcassets */; };
 		BF989177250AABF4002ACF50 /* AltWidgetExtension.appex in Embed App Extensions */ = {isa = PBXBuildFile; fileRef = BF989167250AABF3002ACF50 /* AltWidgetExtension.appex */; settings = {ATTRIBUTES = (RemoveHeadersOnCopy, ); }; };
 		BF98917E250AAC4F002ACF50 /* Countdown.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF98917C250AAC4F002ACF50 /* Countdown.swift */; };
@@ -667,6 +668,7 @@
 		BF8CAE4D248AEABA004D6CCE /* UIDevice+Jailbreak.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIDevice+Jailbreak.swift"; sourceTree = "<group>"; };
 		BF8F69C122E659F700049BA1 /* AppContentViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppContentViewController.swift; sourceTree = "<group>"; };
 		BF8F69C322E662D300049BA1 /* AppViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppViewController.swift; sourceTree = "<group>"; };
+		BF904DE9265DAE9A00E86C2A /* InstalledApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = InstalledApp.swift; sourceTree = "<group>"; };
 		BF989167250AABF3002ACF50 /* AltWidgetExtension.appex */ = {isa = PBXFileReference; explicitFileType = "wrapper.app-extension"; includeInIndex = 0; path = AltWidgetExtension.appex; sourceTree = BUILT_PRODUCTS_DIR; };
 		BF989170250AABF4002ACF50 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		BF989172250AABF4002ACF50 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
@@ -978,6 +980,7 @@
 				BFC712BA2512B9CF00AB5EBE /* PluginManager.swift */,
 				BFAD67A225E0854500D4C4D1 /* DeveloperDiskManager.swift */,
 				BFF0394A25F0551600BE607D /* MenuController.swift */,
+				BF904DE9265DAE9A00E86C2A /* InstalledApp.swift */,
 				BF703195229F36FF006E110F /* Devices */,
 				BFD52BDC22A0A659000B7ED1 /* Connections */,
 				BF055B4A233B528B0086DEA9 /* Extensions */,
@@ -2295,6 +2298,7 @@
 				BFECAC8124FD950B0077C41F /* ALTServerError+Conveniences.swift in Sources */,
 				BFECAC7F24FD950B0077C41F /* CodableServerError.swift in Sources */,
 				BFECAC8624FD950B0077C41F /* Result+Conveniences.swift in Sources */,
+				BF904DEA265DAE9A00E86C2A /* InstalledApp.swift in Sources */,
 				BFF435D9255CBDAB00DD724F /* ALTApplication+AltStoreApp.swift in Sources */,
 				BF718BD523C928A300A89F2D /* ALTNotificationConnection.mm in Sources */,
 				BF1E312B229F474900370A3C /* RequestHandler.swift in Sources */,