flutter_keychain

一个支持通过 Keychain 和 Keystore 支持字符串安全存储的 Flutter 插件

如果您有其他类型想要存储，则需要序列化为 UTF-8 字符串。

使用

import 'package:flutter_keychain/flutter_keychain.dart';
...

// Get value
var value = await FlutterKeychain.get(key: "key");

// Put value
await FlutterKeychain.put(key: "key", value: "value");

// Remove item
await FlutterKeychain.remove(key: "key");

// Clear the secure store
await FlutterKeychain.clear();

鸿蒙OS代码

RSA 密钥封装

async encrypt(input: string): Promise<string{
const options: huks.HuksOptions = {
  properties: this.getAesEncryptProperties(),
  inData: StringToUint8Array(input)
}
try {
  let huksSessionHandle: huks.HuksSessionHandle = await huks.initSession(this.keyAlias, options)
  let handle: number = huksSessionHandle.handle
  let huksReturnResult: huks.HuksReturnResult = await huks.finishSession(handle, options)
  let cipherData: Uint8Array = huksReturnResult.outData as Uint8Array
  return Uint8ArrayToString(cipherData)
} catch (err) {
  Log.e(TAG, "Failed to encrypt, err =" + JSON.stringify(err))
}
return ''
  }

  async decrypt(input: string): Promise<string{
const options: huks.HuksOptions = {
  properties: this.getAesDecryptProperties(),
  inData: StringToUint8Array(input)
}
try {
  let huksSessionHandle: huks.HuksSessionHandle = await huks.initSession(this.keyAlias, options)
  let handle: number = huksSessionHandle.handle
  let huksReturnResult: huks.HuksReturnResult = await huks.finishSession(handle, options)
  let cipherData: Uint8Array = huksReturnResult.outData as Uint8Array
  return Uint8ArrayToString(cipherData)
} catch (err) {
  Log.e(TAG, "Failed to decrypt, err =" + JSON.stringify(err))
}
return ''
  }

存储

      put(result: MethodResult, key: string, value: string) {
this.encryptor?.encrypt(value).then((value) => {
  if (value) {
const data = StringToUint8Array(value)
this.preferences?.put(key, data)
this.preferences?.flush()
  }
}).finally(() => {
  result.success(null)
})
  }

获取

      get(result: MethodResult, key: string) {
if (this.preferences) {
  this.preferences.get(key, null).then(async (encryptedValue) => {
if (encryptedValue) {
  try {
const data = Uint8ArrayToString(encryptedValue as Uint8Array)
let decryptValue = await this.encryptor?.decrypt(data)
result.success(decryptValue)
  } catch (err) {
result.error(this.resultErrorName, err?.message, err)
  }
} else {
  result.success(null)
}
  })
} else {
  result.success(null)
}
  }

移除

   remove(result: MethodResult, key: string) {
this.preferences?.delete(key).then(() => {
  this.preferences?.flush()
}).finally(() => {
  result.success(null)
})
  }

清空

   clear(result: MethodResult) {
this.preferences?.clear().then(() => {
  this.preferences?.flush()
}).finally(() => {
  result.success(null)
})
  }

刷新

   flush() {
try {
  let promise = this.preferences?.flush();
  promise?.then(() => {
Log.i(TAG, "Succeeded in flushing.");
  }).catch((err: ESObject) => {
Log.w(TAG, "Failed to flush." + JSON.stringify(err));
  })
} catch (err) {
  Log.w(TAG, "Failed to flush." + JSON.stringify(err));
}
  }