HslCertificate 方法

从证书的原始字节创建一个HslCertificate对象，方便浏览证书的基本信息。
Create a HslCertificate object from the original bytes of the certificate to facilitate browsing the basic information of the certificate.

获取当前证书的原始字节信息，可以存储到文件中，必须提供私钥信息，否则无法进行签名的操作
Gets the raw byte information of the current certificate, which can be stored in a file, and the private key information must be provided, otherwise the signing operation cannot be performed

从文件的二进制数据中加载相关的参数

使用给定的公钥，校验当前的证书是否合法的，如果公钥为 null，则直接校验证书本身是否合法。
Use the given public key to verify whether the current certificate is valid, and if the public key is null, directly verify whether the certificate itself is valid.

获取当前对象的JSON格式表示的字符串。
Gets the string represented by the JSON format of the current object.