HarmonyOS 鸿蒙Next RSA加密解密工具封装

1.生成密钥对

private static async genKeyPairByData(pubKeyDataStr: string, priKeyDataStr: string) {
  let pubKeyBlob: cryptoFramework.DataBlob = { data: await base64Helper.decode(pubKeyDataStr) };
  let priKeyBlob: cryptoFramework.DataBlob = { data: await base64Helper.decode(priKeyDataStr) };
  let rsaGenerator = cryptoFramework.createAsyKeyGenerator(‘RSA1024’);
  let keyPair = await rsaGenerator.convertKey(pubKeyBlob, priKeyBlob);
  return keyPair;
}

2.加密接口

 static async rsa1024_encryptMessagePromise(publicKeyStr: string, privateKeyStr: string, message: string) {
   let keyPair = await CSRSACryptUtil.genKeyPairByData(publicKeyStr, privateKeyStr);
   let plainText: cryptoFramework.DataBlob = { data: new Uint8Array(buffer.from(message, ‘utf-8’).buffer) };
   let cipher = cryptoFramework.createCipher(‘RSA1024|PKCS1’);
   await cipher.init(cryptoFramework.CryptoMode.ENCRYPT_MODE, keyPair.pubKey, null);
   let encryptData = await cipher.doFinal(plainText);
   let result = base64Helper.encodeToStringSync(encryptData.data);
   return result;
}

3.解密接口

static async rsa1024_decryptMessagePromise(publicKeyStr: string, privateKeyStr: string, cipherTextStr: string) {
  let keyPair = await CSRSACryptUtil.genKeyPairByData(publicKeyStr, privateKeyStr);
  let cipherText:cryptoFramework.DataBlob = {data: await base64Helper.decode(cipherTextStr)};
  let decoder = cryptoFramework.createCipher(‘RSA1024|PKCS1’);
  await decoder.init(cryptoFramework.CryptoMode.DECRYPT_MODE, keyPair.priKey, null);
  let decryptData = await decoder.doFinal(cipherText);
  let result = buffer.from(decryptData.data).toString(‘utf-8’);
  return result;
}