What are architecture patterns for Keychain in Swift?

Keychain architecture patterns in Swift provide efficient ways to manage secure data storage. These patterns help developers handle sensitive information such as passwords and tokens with optimal security and organization.

architecture patterns, Keychain, Swift, secure data storage, sensitive information, passwords, tokens


        // Example of using Keychain in Swift
        
        import Security
        
        class KeychainHelper {
            class func save(key: String, data: Data) -> OSStatus {
                let query: [String: Any] = [
                    kSecClass as String: kSecClassGenericPassword,
                    kSecAttrAccount as String: key,
                    kSecValueData as String: data
                ]
                SecItemDelete(query as CFDictionary) // Delete old item
                return SecItemAdd(query as CFDictionary, nil) // Add new item
            }
            
            class func load(key: String) -> Data? {
                let query: [String: Any] = [
                    kSecClass as String: kSecClassGenericPassword,
                    kSecAttrAccount as String: key,
                    kSecReturnData as String: kCFBooleanTrue!,
                    kSecMatchLimit as String: kSecMatchLimitOne
                ]
                
                var dataTypeRef: AnyObject? = nil
                let status: OSStatus = SecItemCopyMatching(query as CFDictionary, &dataTypeRef)
                
                if status == errSecSuccess {
                    return dataTypeRef as? Data
                }
                return nil
            }
            
            class func delete(key: String) -> OSStatus {
                let query: [String: Any] = [
                    kSecClass as String: kSecClassGenericPassword,
                    kSecAttrAccount as String: key
                ]
                return SecItemDelete(query as CFDictionary)
            }
        }
        
        // Usage
        let key = "my_secure_key"
        let password = "mySecurePassword".data(using: .utf8)!
        
        // Save password
        KeychainHelper.save(key: key, data: password)
        
        // Load password
        if let loadedPassword = KeychainHelper.load(key: key) {
            print(String(data: loadedPassword, encoding: .utf8) ?? "No password found")
        }
        
        // Delete password
        KeychainHelper.delete(key: key)

What are architecture patterns for Keychain in Swift?

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What are architecture patterns for Keychain in Swift?

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