Js前台加密,Java后台解密(Hutool)

[pruidong]

 
    // log是Lombok的@Slf4j注解
    //
    // HuTool,生成公钥和私钥(需要引入maven依赖):

    KeyPair pair = SecureUtil.generateKeyPair("SM2");

    byte[] privateKeyBytes = pair.getPrivate().getEncoded();
    byte[] publicKeyBytes = pair.getPublic().getEncoded();

    String privateKeyBase64 = Base64.getEncoder().encodeToString(privateKeyBytes);
    String publicKeyBase64 = Base64.getEncoder().encodeToString(publicKeyBytes);

    System.out.println("私钥(Base64): " + privateKeyBase64);
    System.out.println("公钥(Base64): " + publicKeyBase64);

    SM2 sm2 = SmUtil.sm2(privateKeyBytes, publicKeyBytes);
    // 公钥加密，私钥解密
    String encryptStr = sm2.encryptBase64("你好", KeyType.PublicKey);
    System.out.println(encryptStr);
    String decryptStr = StrUtil.utf8Str(sm2.decrypt(encryptStr, KeyType.PrivateKey));
    System.out.println(decryptStr);



  // 后端解密过程.
  // 把上面生成的公钥和私钥对改成下面的:
  
  private static final String PUBLIC_KEY =
      "公钥";
  private static final String PRIVATE_KEY =
      "私钥";

  public static String decryptStr(String params) {
    try {
      var sm2 = SmUtil.sm2(PRIVATE_KEY, PUBLIC_KEY);
      // 前台cipherMode=1
      sm2.setMode(SM2Engine.Mode.C1C3C2);
      // 把下面这个值的输出返回给前台,这是前台用的pubkeyHex
      // 
      // System.out.println(sm2.getQ(false));
      var decryptResult = StrUtil.utf8Str(sm2.decrypt(params, KeyType.PrivateKey));
      var decryptResult1 = new String(Base64.getDecoder().decode(decryptResult));
      log.info("入参: {},解密后: {}", params, decryptResult1);
      return decryptResult1;
    } catch (Exception exception) {
      log.error("解密失败,入参: {},失败原因: {}", params, exception.getMessage());
      exception.printStackTrace();
    }
    return "";
  }