正在适配HarmonyOS版Flutter，以往AES加密用的是encrypt三方库，但是这个库并没有在HarmonyOS的“三方库适配计划”中集成，该如何使用AES加密呢？

Question

如题：正在适配HarmonyOS版Flutter，以往AES加密用的是encrypt三方库，但是这个库并没有在HarmonyOS的“三方库适配计划”中集成，该如何使用AES加密呢？

Answer 1

HarmonyOS自有的aes加解密，以下为aes的代码demo实例：

import { cryptoFramework } from '@kit.CryptoArchitectureKit';
import { buffer, util } from '@kit.ArkTS';
@Entry()
@Component
struct AESEBCCrypto {
  @State message: string = '点击开始';
  build() {
    Row() {
      Column() {
        Text(this.message)
          .fontSize(50)
          .fontWeight(FontWeight.Bold)
          .onClick(() => {
            aesEBC()
          })
      }
      .width('100%')
    }
    .height('100%')
  }
}
const name:string = ""
// 加密消息
function encryptMessage(symKey: cryptoFramework.SymKey, plainText: cryptoFramework.DataBlob) {
  let cipher = cryptoFramework.createCipher('AES128|ECB|PKCS7');
  cipher.initSync(cryptoFramework.CryptoMode.ENCRYPT_MODE, symKey, null);
  let cipherData = cipher.doFinalSync(plainText);
  return cipherData;
}
// 解密消息
function decryptMessage(symKey: cryptoFramework.SymKey, cipherText: cryptoFramework.DataBlob) {
  let decoder = cryptoFramework.createCipher('AES128|ECB|PKCS7');
  decoder.initSync(cryptoFramework.CryptoMode.DECRYPT_MODE, symKey, null);
  let decryptData = decoder.doFinalSync(cipherText);
  return decryptData;
}
async function genSymKeyByData(symKeyData: Uint8Array) {
  let symKeyBlob: cryptoFramework.DataBlob = { data: symKeyData };
  let aesGenerator = cryptoFramework.createSymKeyGenerator('AES128');
  let symKey = await aesGenerator.convertKey(symKeyBlob);
  console.info('convertKey success');
  return symKey;
}
async function aesEBC() {
  try {
    let base64 = new util.Base64Helper();
    // let keyData = new Uint8Array([83, 217, 231, 76, 28, 113, 23, 219, 250, 71, 209, 210, 205, 97, 32, 159]);
    let keyData = "1cda6251e07f449b"
    // let base64symKey = base64.decodeSync(keyData);
    let key16 = new Uint8Array (buffer.from(keyData, 'utf8').buffer)
    let symKey = await genSymKeyByData(key16);


    let message = "This is a test";
    let plainText: cryptoFramework.DataBlob = { data: new Uint8Array(buffer.from(message, 'utf-8').buffer) };
    let encryptText = encryptMessage(symKey, plainText);
    let decryptText = decryptMessage(symKey, encryptText);
    if (plainText.data.toString() === decryptText.data.toString()) {
      console.info('decrypt ok');
      console.info('decrypt plainText: ' + buffer.from(decryptText.data).toString('utf-8'));
    } else {
      console.error('decrypt failed');
    }

  } catch (error) {
    console.error(AES ECB “${error}“, error code: ${error.code});
  }
}