// 創(chuàng)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']; // 網(wǎng)站證書中只有公鑰，通過 openssl_pkey_get_details 導(dǎo)出公鑰 $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'] 為 domain.crt// 保存 $ret['pub'] 為 domain.pub return $ret;

$domain = 'blog.zhengxianjun.com';$port = '443';// ...$pub_a = $ret['pub']; $private_key_path = '/conf/ssl/blog.zhengxianjun.com.key'; // 證書沒有設(shè)置密碼，$passphrase 為空字符串$pkey = openssl_pkey_get_private(file_get_content($private_key_path), $passphrase = '');$pub_b = openssl_pkey_get_details($pkey)['key']; // 兩者一致var_dump($pub_a === $pub_b);

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