[PHP] 浅谈PHP SHA1withRSA加密生成签名及验签

/**
   * 拼接需要签名的内容
   * Author: Tao.
   *
   * @param array $data 需签名的字段内容
   * 
   * @return string
   */  
  public static function getSign($data)
  {
  foreach ($data as $k => $v) {
    $Parameters[$k] = $v;
  }
  //按字典序排序参数
  ksort($Parameters);
  $sign = '';
  foreach ($Parameters as $k => $v) {
    $sign .= $k . "=" . $v . "&";
  }
  $sign = '&' . rtrim($sign, '&');
  return $sign;
  }

/**
   * 秘钥加密
   * Author: Tao.
   *
   * @param string $data 之前生成好的需加密内容
   * @param $key 私钥证书位置(.pfx文件)
   * @param string $pwd 证书密码
   *
   * @return string
   */
  public static function SHA1withRSA($data, $key,$pwd)
  {
  openssl_pkcs12_read(file_get_contents($key), $certs, $pwd); 
  if (!$certs) return;
  $signature = '';
  openssl_sign($data, $signature, $certs['pkey']);
  return bin2hex($signature); 
  }

/**
   * 获取公钥
   * Author: Tao.
   *
   * @param $path //公钥证书位置 (.cer文件)
   *
   * @return mixed
   * @throws \Exception
   */
  public static function loadCert($path)
  {
  $file = file_get_contents($path);
  if (!$file) {
    throw new \Exception('loadx509Cert::file_get_contents ERROR');
  }
 
  $cert = chunk_split(base64_encode($file), 64, "\n");
  $cert = "-----BEGIN CERTIFICATE-----\n" . $cert . "-----END CERTIFICATE-----\n";
 
  $res = openssl_pkey_get_public($cert);
  $detail = openssl_pkey_get_details($res);
  openssl_free_key($res);
 
  if (!$detail) {
    throw new \Exception('loadX509Cert::openssl_pkey_get_details ERROR');
  }
  return $detail['key'];
  }
 
  /**
   * 公钥加密
   * Author: Tao.
   * 
   * @param $pubPath //公钥证书位置 (.cer文件)
   * @param string $bankCode //银行卡号
   * 
   * @return string
   */
  public static function rsa_encode($bankCode,$pubPath)
  {
  $pubkey = self::loadCert($pubPath);
  $encrypt_data = '';
  openssl_public_encrypt($bankCode, $encrypt_data, $pubkey);
  $encrypt_data = base64_encode($encrypt_data);
  return $encrypt_data;
  }

/**
   * 验证返回的签名是否正确
   *
   * @param string $data 要验证的签名原文
   * @param string $signature 签名内容
   *@param $pubPath 公钥证书位置 (.cer文件)
   *
   * @return bool
   */
  public static function verifyRespondSign($data, $signature,$pubPath)
  {
  $keys = self::loadCert($pubPath);
  $signature = hex2bin($signature);
  $ok = openssl_verify($data, $signature, $keys);
  if ($ok == 1) {
    return true;
  }
  return false;
  }