智汀云盘-开发指南iOS：文件夹加密逻辑

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1.加密文件夹—加密过程

1.文件夹的创建可设置私人文件夹及加密过程：

2.访问服务器接口，创建私人文件夹

            NetworkManager.shared.createFolder(name: name, pool_name: pool_name, partition_name: partition_name, is_encrypt: is_encrypt, pwd: pwd, confirm_pwd: confirmPwd, mode: mode, auth: members) { [weak self] _ in
                self?.showToast("保存成功".localizedString)
                self?.navigationController?.popViewController(animated: true)

            } failureCallback: { [weak self] code, err in
                self?.hideLoading()
                self?.showToast(err)
            }

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3.创建给可访问用户后可在该用户的文件列表内展示。

2.加密文件夹—解密过程

1.文件列表数据Model中属性is_encrypt 为 1 时，则为加密文件或文件夹

2.加密文件夹样式的区分。

3.加密文件夹进入的逻辑如下

• tableview点击相应代理方法，具体参考MyFileViewController.swift

                if file.is_encrypt == 1 {//加密文件
                //存储的密码对象
                let key = AreaManager.shared.currentArea.scope_token + file.path
                    let pwdJsonStr:String = UserDefaults.standard.value(forKey: key) as? String ?? ""
                let pwdModel = PasswordModel.deserialize(from: pwdJsonStr)
                if pwdModel != nil {
                    //计算时间差
                    let timeTemp = TimeTool.TimeInterval(FromTime: pwdModel!.saveTime)
                    if timeTemp > 72 {//大于72小时
                        //重新输入密码
                        pushToFolder(isNeedPwd: true, file: file)
                    }else{
                        //无需输入密码
                        pushToFolder(isNeedPwd: false, file: file)
                    }
                }else{
                    //需要重新输入密码
                    pushToFolder(isNeedPwd: true, file: file)
                }
            }else{
                //无需输入密码
                pushToFolder(isNeedPwd: false, file: file)
            }

   private func pushToFolder(isNeedPwd:Bool,file:FileModel){
        let vc = FolderViewController()
        vc.currentPath = file.path
        vc.currentPaths = ["文件",file.name]
        vc.encrytRootFile = file
        vc.isWriteRoot = (file.write == 1)
        
        let key = AreaManager.shared.currentArea.scope_token + file.path
        if file.is_encrypt == 1 {
            vc.rootPasswordKey = key
        }else{
            vc.rootPasswordKey = ""
        }
        if isNeedPwd {
            //存储文件夹根目录Key
            self.tipsTestFieldAlert = TipsTestFieldAlertView.show(message: "请输入密码", sureCallback: { pwd in
                print("密码是\(pwd)")
                NetworkManager.shared.decryptFolder(name: file.path, password: pwd) {[weak self] response in
                    guard let self = self else {return}
                    //存储时间和密码
                    let pwdModel = PasswordModel()
                    pwdModel.password = pwd
                    //当前时间
                    let dateFormatter = DateFormatter()
                    dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
                    pwdModel.saveTime = dateFormatter.string(from: Date())
                    UserDefaults.standard.setValue(pwdModel.toJSONString(prettyPrint:true), forKey: key)
                    
                    //解密成功，进入文件夹
                    let nav = BaseNavigationViewController(rootViewController: vc)
                    nav.modalPresentationStyle = .fullScreen
                    nav.transitioningDelegate = self.transitionUtil
                    self.navigationController?.present(nav, animated: true, completion: nil)
                } failureCallback: { code, err in
                    self.showToast(err)
                }
            })
        }else{
            //无需输入密码
            let nav = BaseNavigationViewController(rootViewController: vc)
            nav.modalPresentationStyle = .fullScreen
            nav.transitioningDelegate = transitionUtil
            self.navigationController?.present(nav, animated: true, completion: nil)
        }
    }

• 加密文件夹进入子集目录需携带最初加密的文件，方便获取路径以及密码

• 解密过程逻辑如下：（其中规则根据自身项目的需求来定，本项目以超出72小时则自动失效为准则,所以需存储首次解密的时间）
   

            //存储文件夹根目录Key
            self.tipsTestFieldAlert = TipsTestFieldAlertView.show(message: "请输入密码", sureCallback: { pwd in
                print("密码是\(pwd)")
                NetworkManager.shared.decryptFolder(name: file.path, password: pwd) {[weak self] response in
                    guard let self = self else {return}
                    //存储时间和密码
                    let pwdModel = PasswordModel()
                    pwdModel.password = pwd
                    //当前时间
                    let dateFormatter = DateFormatter()
                    dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
                    pwdModel.saveTime = dateFormatter.string(from: Date())
                    UserDefaults.standard.setValue(pwdModel.toJSONString(prettyPrint:true), forKey: key)
                    
                    //解密成功，进入文件夹
                    let nav = BaseNavigationViewController(rootViewController: vc)
                    nav.modalPresentationStyle = .fullScreen
                    nav.transitioningDelegate = self.transitionUtil
                    self.navigationController?.present(nav, animated: true, completion: nil)
                } failureCallback: { code, err in
                    self.showToast(err)
                }
            })

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