今天与 Swift 共享钥匙串反应本机小部件

Question

我们有一个react-native应用程序，它以这种方式使用react-native-keychain库（就像本期一样）：

import * as Keychain from 'react-native-keychain';
 try {
            Keychain.setInternetCredentials(
                'device-id',
                'RANDOMDATA',
                DeviceInfo.getUniqueID().toString(),
                { accessGroup: 'org.reactjs.native.example.myreactapp'})
                .then(() => console.log('Done'))
        } catch (err) {
            console.log("error save", err)
        }

我希望能够在我今天用 swift 制作的小部件中检索这些数据，我需要知道它的存储密钥。 以下是我应该将其恢复到小部件上的方法：

let itemKey = "device-id"
let keychainAccessGroupName = "3P********.org.reactjs.native.example.myreactapp"

let queryLoad: [String: AnyObject] = [
      kSecClass as String: kSecClassGenericPassword,
      kSecAttrAccount as String: itemKey as AnyObject,
      kSecReturnData as String: kCFBooleanTrue,
      kSecMatchLimit as String: kSecMatchLimitOne,
      kSecAttrAccessGroup as String: keychainAccessGroupName as AnyObject
    ]

    var result: AnyObject?

    let resultCodeLoad = withUnsafeMutablePointer(to: &result) {
      SecItemCopyMatching(queryLoad as CFDictionary, UnsafeMutablePointer($0))
    }

    if resultCodeLoad == noErr {
      if let result = result as? Data,
        let keyValue = NSString(data: result,
                                encoding: String.Encoding.utf8.rawValue) as String? {

        // Found successfully
        print("device-id : ", keyValue)
      }
    } else {
      print("Error loading from Keychain: \(resultCodeLoad)")
    }

以下代码来自此博客

但这不起作用。您可能已经注意到，我需要将设备 ID 传递给小部件，因为与 Android 不同，UUID 经常更改，并且我们在每个部分上获得不同的 ID，这会阻止小部件正常工作

Answer 1

在APP中更改此代码：

{ accessGroup: 'org.reactjs.native.example.myreactapp'})

到

{ accessGroup: '3P********.org.reactjs.native.example.myreactapp'})

Answer 2

这是我的解决方案：

在我的 React Native 应用程序中：

import * as Keychain from 'react-native-keychain';


export function saveToKeychain(key: AllowedKeychainKeysEnum, value: string) {

  return Keychain.setInternetCredentials(
    key,
    key,
    value,
    {
      accessible: Keychain.ACCESSIBLE.ALWAYS,
      accessGroup: KEYCHAIN_GROUP,
    },
  );
}

使用这个函数可能看起来像这样：

saveToKeychain(ACCESS_TOKEN_NAME, accessToken)

现在在您的 swift 应用程序中：

  func readFromKeychain(key: String) -> String? {
      let query = [
          kSecClass as String : kSecClassInternetPassword,
          kSecAttrAccessGroup as String : keychainGroup,
          kSecAttrServer as String : key,
          kSecAttrAccount as String : key,
          kSecReturnData as String : kCFBooleanTrue!,
          kSecMatchLimit as String : kSecMatchLimitOne
      ] as [String : Any]
      
      var dataTypeRef: AnyObject? = nil
      let status: OSStatus = SecItemCopyMatching(query as CFDictionary, &dataTypeRef)
      
      if status == noErr {
          let text = String(data: dataTypeRef as! Data, encoding: String.Encoding.utf8)
          return text
      } else {
          return nil
      }
    }

确保您创建了一个钥匙串组。本指南可以向您展示如何操作：https://evgenii.com/blog/sharing-keychain-in-ios/。

还要确保在代码中引用钥匙串组的任何地方都使用您的应用程序 ID 作为前缀。