[AltStore] Refreshes installed apps in background

AltStore/Components/Keychain.swift

@@ -0,0 +1,56 @@
+//
+//  Keychain.swift
+//  AltStore
+//
+//  Created by Riley Testut on 6/4/19.
+//  Copyright © 2019 Riley Testut. All rights reserved.
+//
+
+import Foundation
+import KeychainAccess
+
+import AltSign
+
+class Keychain
+{
+    static let shared = Keychain()
+    
+    private let keychain = KeychainAccess.Keychain(service: "com.rileytestut.AltStore").accessibility(.afterFirstUnlock).synchronizable(true)
+    
+    private init()
+    {
+    }
+}
+
+extension Keychain
+{
+    var appleIDEmailAddress: String? {
+        get {
+            let emailAddress = try? self.keychain.get("appleIDEmailAddress")
+            return emailAddress
+        }
+        set {
+           self.keychain["appleIDEmailAddress"] = newValue
+        }
+    }
+    
+    var appleIDPassword: String? {
+        get {
+            let password = try? self.keychain.get("appleIDPassword")
+            return password
+        }
+        set {
+            self.keychain["appleIDPassword"] = newValue
+        }
+    }
+    
+    var signingCertificatePrivateKey: Data? {
+        get {
+            let privateKey = try? self.keychain.getData("signingCertificatePrivateKey")
+            return privateKey
+        }
+        set {
+            self.keychain[data: "signingCertificatePrivateKey"] = newValue
+        }
+    }
+}