HarmonyOS SM2数据签名

参考demo：

import cryptoFramework from '@ohos.security.cryptoFramework';
import buffer from '@ohos.buffer';
import { util } from '@kit.ArkTS';

@Entry
@Component
struct signAndVerifySM2 {
  @State message: string = '点击开始';

  build() {
    Row() {
      Column() {
        Text(this.message)
          .fontSize(50)
          .fontWeight(FontWeight.Bold)
          .onClick(() => {
            SM2Main()
          })
      }
      .width('100%')
    }
    .height('100%')
  }
}

let input1: cryptoFramework.DataBlob = { data: new Uint8Array(buffer.from("This is Sign test plan1", 'utf-8').buffer) };
let input2: cryptoFramework.DataBlob = { data: new Uint8Array(buffer.from("This is Sign test plan2", 'utf-8').buffer) };

async function signMessagePromise(priKey: cryptoFramework.PriKey) {
  let signAlg = "SM2_256|SM3";
  let signer = cryptoFramework.createSign(signAlg);
  await signer.init(priKey);
  await signer.update(input1); // 如果明文较短，可以直接调用sign接口一次性传入
  let signData = await signer.sign(input2);
  return signData;
}

async function verifyMessagePromise(signMessageBlob: cryptoFramework.DataBlob, pubKey: cryptoFramework.PubKey) {
  let verifyAlg = "SM2_256|SM3";
  let verifier = cryptoFramework.createVerify(verifyAlg);
  await verifier.init(pubKey);
  await verifier.update(input1); // 如果明文较短，可以直接调用verify接口一次性传入
  let res = await verifier.verify(input2, signMessageBlob);
  console.info("verify result is " + res);
  return res;
}

async function SM2Main() {
  let keyGenAlg = "SM2_256";
  let generator = cryptoFramework.createAsyKeyGenerator(keyGenAlg);
  let keyPair = await generator.generateKeyPair();
  let signData = await signMessagePromise(keyPair.priKey);
  let verifyResult = await verifyMessagePromise(signData, keyPair.pubKey);
  if (verifyResult == true) {
    console.info('verify success');
  } else {
    console.error('verify failed');
  }
}
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