HarmonyOS SM4如何进行SM4/ECB/NoPadding加密？

Question

// 加密消息
async encryptMessage(symKey: cryptoFramework.SymKey, plainText: cryptoFramework.DataBlob) {
  let cipher = cryptoFramework.createCipher('SM4_128/ECB/NoPadding');
  cipher.initSync(cryptoFramework.CryptoMode.ENCRYPT_MODE, symKey, null);
  let encryptData = cipher.doFinalSync(plainText);
  return encryptData;
}

请问如何进行SM4/ECB/NoPadding进行加密？/初始化cryptoFramework

Answer 1

sm4 ECB NoPadding 加解密的代码demo实例如下：

import { cryptoFramework } from '@kit.CryptoArchitectureKit';
import { buffer } from '@kit.ArkTS';

@Entry
@Component
struct SM4Crypto {
  @State message: string = '点击开始';

  build() {
    Row() {
      Column() {
        Text(this.message)
          .fontSize(50)
          .fontWeight(FontWeight.Bold)
          .onClick(() => {
            SM4CryptoMain()
          })
      }
      .width('100%')
    }
    .height('100%')
  }
}

async function SM4CryptoMain() {
  const sKey: string = "D6591A9DB9F8792A1A96CBC7A2BB3A49";
  const symKeyData = buffer.from(sKey, 'hex')//  hex    utf-8
  let symKeyDataUint8Array = new Uint8Array(symKeyData.buffer)

  let symKey = await genSymKeyByData(symKeyDataUint8Array);
  let plainText: cryptoFramework.DataBlob = { data: new Uint8Array(buffer.from('this is a test', 'hex').buffer) };
  let encryptText = await encryptMessagePromise(symKey, plainText);

  let decryptText = await decryptMessagePromise(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');
  }
}

// 加密消息
async function encryptMessagePromise(symKey: cryptoFramework.SymKey, plainText: cryptoFramework.DataBlob) {
  let cipher = cryptoFramework.createCipher('SM4_128|ECB|NoPadding');
  await cipher.init(cryptoFramework.CryptoMode.ENCRYPT_MODE, symKey, null);
  let encryptData = await cipher.doFinal(plainText);
  console.log(`加密成功`)
  return encryptData;
}

// 解密消息
async function decryptMessagePromise(symKey: cryptoFramework.SymKey, cipherText: cryptoFramework.DataBlob) {
  let decoder = cryptoFramework.createCipher('SM4_128|ECB|NoPadding');
  await decoder.init(cryptoFramework.CryptoMode.DECRYPT_MODE, symKey, null);
  let decryptData = await decoder.doFinal(cipherText);
  console.log(`解密成功 ${buffer.from(decryptData.data).toString()}`)
  return decryptData;
}

async function genSymKeyByData(symKeyData: Uint8Array) {
  let symKeyBlob: cryptoFramework.DataBlob = { data: symKeyData };
  let symGenerator = cryptoFramework.createSymKeyGenerator('SM4_128');
  let symKey = await symGenerator.convertKey(symKeyBlob);
  console.log(`sm4 转密钥成功`)
  return symKey;
}