PHP は Socket を使用して Web サイトの SSL 証明書と公開キーを取得します

// 创建 stream context $context = stream_context_create([ 'ssl' => [ 'capture_peer_cert' => true, 'capture_peer_cert_chain' => true, ], ]); $resource = stream_socket_client("ssl://$domain:$port", $errno, $errstr, 30, STREAM_CLIENT_CONNECT, $context); $cert = stream_context_get_params($resource); $ssl = $cert['options']['ssl']; $resource = $ssl['peer_certificate']; // 网站证书中只有公钥，通过 openssl_pkey_get_details 导出公钥 $ret = [ 'crt' => '', 'pub' => '', ]; $pkey = openssl_pkey_get_public($resource); $ret['pub'] = openssl_pkey_get_details($pkey)['key']; openssl_x509_export($resource, $pem); $ret['crt'] = $pem; foreach ($ssl['peer_certificate_chain'] as $resource) { openssl_x509_export($resource, $pem); $ret['crt'] .= "\n" . $pem; } // 保存 $ret['crt'] 为 domain.crt // 保存 $ret['pub'] 为 domain.pub return $ret;

$domain = 'blog.zhengxianjun.com'; $port = '443'; // ... $pub_a = $ret['pub']; $private_key_path = '/conf/ssl/blog.zhengxianjun.com.key'; // 证书没有设置密码，$passphrase 为空字符串 $pkey = openssl_pkey_get_private(file_get_content($private_key_path), $passphrase = ''); $pub_b = openssl_pkey_get_details($pkey)['key']; // 两者一致 var_dump($pub_a === $pub_b);

$resource = stream_socket_client("ssl://$ip:$port", $errno, $errstr, 30, STREAM_CLIENT_CONNECT, $context); $cert = stream_context_get_params($resource); // 解析 X.509 格式证书 $info = openssl_x509_parse($cert['options']['ssl']['peer_certificate']); // 获取证书中的可信域名列表 $domain = str_replace('DNS:', '', $info['extensions']['subjectAltName']);