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Pods/DDPersistenceKit_Private/DDPersistenceKit_Private/Classes/DDKeychain.swift

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+//
+//   DDKeychain.swift
+//   DDPersistenceKit_Private
+//   Created by DDIsFriend on 2023/9/21.
+//
+
+import Foundation
+import Security
+
+public let DDKC = DDKeychain.default
+open class DDKeychain : NSObject {
+    public static let `default` = DDKeychain()
+    
+    public struct Credentials {
+        var itemKey : String
+        var itemValue : String?
+        public init(itemKey: String, itemValue: String? = nil) {
+            self.itemKey = itemKey
+            self.itemValue = itemValue
+        }
+    }
+    
+    public enum KeychainError : Int {
+        case success = 0
+        case failure = 1
+    }
+    
+    public func addItem(credentials:Credentials) -> KeychainError {
+        let itemKey = credentials.itemKey
+        guard let itemValue = credentials.itemValue else {
+            return .failure
+        }
+        let itemValueData = itemValue.data(using: .utf8)!
+        let query : [String : Any] = [kSecValueData as String:itemValueData,kSecAttrAccount as String:itemKey,kSecClass as String:kSecClassGenericPassword]
+        let status = SecItemAdd(query as CFDictionary, nil)
+        if status == 0 {
+            return .success
+        }
+        return .failure
+    }
+    
+    public func queryItem(credentials:Credentials) -> Data? {
+        let itemKey = credentials.itemKey
+        let query : [String : Any] = [kSecReturnData as String:true,kSecAttrAccount as String:itemKey,kSecClass as String:kSecClassGenericPassword]
+        
+        var itemValueData : CFTypeRef?
+        let status = SecItemCopyMatching(query as CFDictionary, &itemValueData)
+        if status == 0 {
+            return itemValueData as? Data
+        }
+        return nil
+    }
+    
+    public func updateItem(credentials:Credentials) -> KeychainError {
+        let query : [String : Any] = [kSecAttrAccount as String: credentials.itemKey,kSecClass as String:kSecClassGenericPassword]
+        guard let itemValue = credentials.itemValue else {
+            return .failure
+        }
+        let itemValueData = itemValue.data(using: .utf8)!
+        let attributes : [String : Any] = [kSecValueData as String:itemValueData]
+        
+        let status = SecItemUpdate(query as CFDictionary, attributes as CFDictionary)
+        if status == 0 {
+            return .success
+        }
+        return .failure
+    }
+    
+    public func deleteItem(credentials:Credentials) -> KeychainError {
+        let query : [String : Any] = [kSecClass as String:kSecClassGenericPassword,kSecAttrAccount as String:credentials.itemKey]
+        let status = SecItemDelete(query as CFDictionary)
+        if status == 0 {
+            return .success
+        }
+        return .failure
+    }
+}