tlsSocket.getPeerCertificate([detailed])

• detailed <boolean> 如果为 true，则包含完整的证书链，否则仅包含对端证书。
• 返回：<Object> 一个证书对象。

返回一个表示对等方证书的对象。如果对等方未提供证书，将返回一个空对象。如果套接字已被销毁，则返回 null。

【Returns an object representing the peer's certificate. If the peer does not provide a certificate, an empty object will be returned. If the socket has been destroyed, null will be returned.】

如果请求了完整的证书链，每个证书都会包含一个 issuerCertificate 属性，其中包含表示其颁发者证书的对象。

【If the full certificate chain was requested, each certificate will include an issuerCertificate property containing an object representing its issuer's certificate.】