diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-includes/class-wp-http-streams.php --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/wp/wp-includes/class-wp-http-streams.php Mon Oct 14 17:39:30 2019 +0200 @@ -0,0 +1,432 @@ + 'GET', 'timeout' => 5, + 'redirection' => 5, 'httpversion' => '1.0', + 'blocking' => true, + 'headers' => array(), 'body' => null, 'cookies' => array() + ); + + $r = wp_parse_args( $args, $defaults ); + + if ( isset( $r['headers']['User-Agent'] ) ) { + $r['user-agent'] = $r['headers']['User-Agent']; + unset( $r['headers']['User-Agent'] ); + } elseif ( isset( $r['headers']['user-agent'] ) ) { + $r['user-agent'] = $r['headers']['user-agent']; + unset( $r['headers']['user-agent'] ); + } + + // Construct Cookie: header if any cookies are set. + WP_Http::buildCookieHeader( $r ); + + $arrURL = parse_url($url); + + $connect_host = $arrURL['host']; + + $secure_transport = ( $arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https' ); + if ( ! isset( $arrURL['port'] ) ) { + if ( $arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https' ) { + $arrURL['port'] = 443; + $secure_transport = true; + } else { + $arrURL['port'] = 80; + } + } + + // Always pass a Path, defaulting to the root in cases such as http://example.com + if ( ! isset( $arrURL['path'] ) ) { + $arrURL['path'] = '/'; + } + + if ( isset( $r['headers']['Host'] ) || isset( $r['headers']['host'] ) ) { + if ( isset( $r['headers']['Host'] ) ) + $arrURL['host'] = $r['headers']['Host']; + else + $arrURL['host'] = $r['headers']['host']; + unset( $r['headers']['Host'], $r['headers']['host'] ); + } + + /* + * Certain versions of PHP have issues with 'localhost' and IPv6, It attempts to connect + * to ::1, which fails when the server is not set up for it. For compatibility, always + * connect to the IPv4 address. + */ + if ( 'localhost' == strtolower( $connect_host ) ) + $connect_host = '127.0.0.1'; + + $connect_host = $secure_transport ? 'ssl://' . $connect_host : 'tcp://' . $connect_host; + + $is_local = isset( $r['local'] ) && $r['local']; + $ssl_verify = isset( $r['sslverify'] ) && $r['sslverify']; + if ( $is_local ) { + /** + * Filters whether SSL should be verified for local requests. + * + * @since 2.8.0 + * + * @param bool $ssl_verify Whether to verify the SSL connection. Default true. + */ + $ssl_verify = apply_filters( 'https_local_ssl_verify', $ssl_verify ); + } elseif ( ! $is_local ) { + /** + * Filters whether SSL should be verified for non-local requests. + * + * @since 2.8.0 + * + * @param bool $ssl_verify Whether to verify the SSL connection. Default true. + */ + $ssl_verify = apply_filters( 'https_ssl_verify', $ssl_verify ); + } + + $proxy = new WP_HTTP_Proxy(); + + $context = stream_context_create( array( + 'ssl' => array( + 'verify_peer' => $ssl_verify, + //'CN_match' => $arrURL['host'], // This is handled by self::verify_ssl_certificate() + 'capture_peer_cert' => $ssl_verify, + 'SNI_enabled' => true, + 'cafile' => $r['sslcertificates'], + 'allow_self_signed' => ! $ssl_verify, + ) + ) ); + + $timeout = (int) floor( $r['timeout'] ); + $utimeout = $timeout == $r['timeout'] ? 0 : 1000000 * $r['timeout'] % 1000000; + $connect_timeout = max( $timeout, 1 ); + + // Store error number. + $connection_error = null; + + // Store error string. + $connection_error_str = null; + + if ( !WP_DEBUG ) { + // In the event that the SSL connection fails, silence the many PHP Warnings. + if ( $secure_transport ) + $error_reporting = error_reporting(0); + + if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) + $handle = @stream_socket_client( 'tcp://' . $proxy->host() . ':' . $proxy->port(), $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context ); + else + $handle = @stream_socket_client( $connect_host . ':' . $arrURL['port'], $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context ); + + if ( $secure_transport ) + error_reporting( $error_reporting ); + + } else { + if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) + $handle = stream_socket_client( 'tcp://' . $proxy->host() . ':' . $proxy->port(), $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context ); + else + $handle = stream_socket_client( $connect_host . ':' . $arrURL['port'], $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context ); + } + + if ( false === $handle ) { + // SSL connection failed due to expired/invalid cert, or, OpenSSL configuration is broken. + if ( $secure_transport && 0 === $connection_error && '' === $connection_error_str ) + return new WP_Error( 'http_request_failed', __( 'The SSL certificate for the host could not be verified.' ) ); + + return new WP_Error('http_request_failed', $connection_error . ': ' . $connection_error_str ); + } + + // Verify that the SSL certificate is valid for this request. + if ( $secure_transport && $ssl_verify && ! $proxy->is_enabled() ) { + if ( ! self::verify_ssl_certificate( $handle, $arrURL['host'] ) ) + return new WP_Error( 'http_request_failed', __( 'The SSL certificate for the host could not be verified.' ) ); + } + + stream_set_timeout( $handle, $timeout, $utimeout ); + + if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) //Some proxies require full URL in this field. + $requestPath = $url; + else + $requestPath = $arrURL['path'] . ( isset($arrURL['query']) ? '?' . $arrURL['query'] : '' ); + + $strHeaders = strtoupper($r['method']) . ' ' . $requestPath . ' HTTP/' . $r['httpversion'] . "\r\n"; + + $include_port_in_host_header = ( + ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) || + ( 'http' == $arrURL['scheme'] && 80 != $arrURL['port'] ) || + ( 'https' == $arrURL['scheme'] && 443 != $arrURL['port'] ) + ); + + if ( $include_port_in_host_header ) { + $strHeaders .= 'Host: ' . $arrURL['host'] . ':' . $arrURL['port'] . "\r\n"; + } else { + $strHeaders .= 'Host: ' . $arrURL['host'] . "\r\n"; + } + + if ( isset($r['user-agent']) ) + $strHeaders .= 'User-agent: ' . $r['user-agent'] . "\r\n"; + + if ( is_array($r['headers']) ) { + foreach ( (array) $r['headers'] as $header => $headerValue ) + $strHeaders .= $header . ': ' . $headerValue . "\r\n"; + } else { + $strHeaders .= $r['headers']; + } + + if ( $proxy->use_authentication() ) + $strHeaders .= $proxy->authentication_header() . "\r\n"; + + $strHeaders .= "\r\n"; + + if ( ! is_null($r['body']) ) + $strHeaders .= $r['body']; + + fwrite($handle, $strHeaders); + + if ( ! $r['blocking'] ) { + stream_set_blocking( $handle, 0 ); + fclose( $handle ); + return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); + } + + $strResponse = ''; + $bodyStarted = false; + $keep_reading = true; + $block_size = 4096; + if ( isset( $r['limit_response_size'] ) ) + $block_size = min( $block_size, $r['limit_response_size'] ); + + // If streaming to a file setup the file handle. + if ( $r['stream'] ) { + if ( ! WP_DEBUG ) + $stream_handle = @fopen( $r['filename'], 'w+' ); + else + $stream_handle = fopen( $r['filename'], 'w+' ); + if ( ! $stream_handle ) { + return new WP_Error( 'http_request_failed', sprintf( + /* translators: 1: fopen() 2: file name */ + __( 'Could not open handle for %1$s to %2$s.' ), + 'fopen()', + $r['filename'] + ) ); + } + + $bytes_written = 0; + while ( ! feof($handle) && $keep_reading ) { + $block = fread( $handle, $block_size ); + if ( ! $bodyStarted ) { + $strResponse .= $block; + if ( strpos( $strResponse, "\r\n\r\n" ) ) { + $process = WP_Http::processResponse( $strResponse ); + $bodyStarted = true; + $block = $process['body']; + unset( $strResponse ); + $process['body'] = ''; + } + } + + $this_block_size = strlen( $block ); + + if ( isset( $r['limit_response_size'] ) && ( $bytes_written + $this_block_size ) > $r['limit_response_size'] ) { + $this_block_size = ( $r['limit_response_size'] - $bytes_written ); + $block = substr( $block, 0, $this_block_size ); + } + + $bytes_written_to_file = fwrite( $stream_handle, $block ); + + if ( $bytes_written_to_file != $this_block_size ) { + fclose( $handle ); + fclose( $stream_handle ); + return new WP_Error( 'http_request_failed', __( 'Failed to write request to temporary file.' ) ); + } + + $bytes_written += $bytes_written_to_file; + + $keep_reading = !isset( $r['limit_response_size'] ) || $bytes_written < $r['limit_response_size']; + } + + fclose( $stream_handle ); + + } else { + $header_length = 0; + while ( ! feof( $handle ) && $keep_reading ) { + $block = fread( $handle, $block_size ); + $strResponse .= $block; + if ( ! $bodyStarted && strpos( $strResponse, "\r\n\r\n" ) ) { + $header_length = strpos( $strResponse, "\r\n\r\n" ) + 4; + $bodyStarted = true; + } + $keep_reading = ( ! $bodyStarted || !isset( $r['limit_response_size'] ) || strlen( $strResponse ) < ( $header_length + $r['limit_response_size'] ) ); + } + + $process = WP_Http::processResponse( $strResponse ); + unset( $strResponse ); + + } + + fclose( $handle ); + + $arrHeaders = WP_Http::processHeaders( $process['headers'], $url ); + + $response = array( + 'headers' => $arrHeaders['headers'], + // Not yet processed. + 'body' => null, + 'response' => $arrHeaders['response'], + 'cookies' => $arrHeaders['cookies'], + 'filename' => $r['filename'] + ); + + // Handle redirects. + if ( false !== ( $redirect_response = WP_Http::handle_redirects( $url, $r, $response ) ) ) + return $redirect_response; + + // If the body was chunk encoded, then decode it. + if ( ! empty( $process['body'] ) && isset( $arrHeaders['headers']['transfer-encoding'] ) && 'chunked' == $arrHeaders['headers']['transfer-encoding'] ) + $process['body'] = WP_Http::chunkTransferDecode($process['body']); + + if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($arrHeaders['headers']) ) + $process['body'] = WP_Http_Encoding::decompress( $process['body'] ); + + if ( isset( $r['limit_response_size'] ) && strlen( $process['body'] ) > $r['limit_response_size'] ) + $process['body'] = substr( $process['body'], 0, $r['limit_response_size'] ); + + $response['body'] = $process['body']; + + return $response; + } + + /** + * Verifies the received SSL certificate against its Common Names and subjectAltName fields. + * + * PHP's SSL verifications only verify that it's a valid Certificate, it doesn't verify if + * the certificate is valid for the hostname which was requested. + * This function verifies the requested hostname against certificate's subjectAltName field, + * if that is empty, or contains no DNS entries, a fallback to the Common Name field is used. + * + * IP Address support is included if the request is being made to an IP address. + * + * @since 3.7.0 + * @static + * + * @param stream $stream The PHP Stream which the SSL request is being made over + * @param string $host The hostname being requested + * @return bool If the cerficiate presented in $stream is valid for $host + */ + public static function verify_ssl_certificate( $stream, $host ) { + $context_options = stream_context_get_options( $stream ); + + if ( empty( $context_options['ssl']['peer_certificate'] ) ) + return false; + + $cert = openssl_x509_parse( $context_options['ssl']['peer_certificate'] ); + if ( ! $cert ) + return false; + + /* + * If the request is being made to an IP address, we'll validate against IP fields + * in the cert (if they exist) + */ + $host_type = ( WP_Http::is_ip_address( $host ) ? 'ip' : 'dns' ); + + $certificate_hostnames = array(); + if ( ! empty( $cert['extensions']['subjectAltName'] ) ) { + $match_against = preg_split( '/,\s*/', $cert['extensions']['subjectAltName'] ); + foreach ( $match_against as $match ) { + list( $match_type, $match_host ) = explode( ':', $match ); + if ( $host_type == strtolower( trim( $match_type ) ) ) // IP: or DNS: + $certificate_hostnames[] = strtolower( trim( $match_host ) ); + } + } elseif ( !empty( $cert['subject']['CN'] ) ) { + // Only use the CN when the certificate includes no subjectAltName extension. + $certificate_hostnames[] = strtolower( $cert['subject']['CN'] ); + } + + // Exact hostname/IP matches. + if ( in_array( strtolower( $host ), $certificate_hostnames ) ) + return true; + + // IP's can't be wildcards, Stop processing. + if ( 'ip' == $host_type ) + return false; + + // Test to see if the domain is at least 2 deep for wildcard support. + if ( substr_count( $host, '.' ) < 2 ) + return false; + + // Wildcard subdomains certs (*.example.com) are valid for a.example.com but not a.b.example.com. + $wildcard_host = preg_replace( '/^[^.]+\./', '*.', $host ); + + return in_array( strtolower( $wildcard_host ), $certificate_hostnames ); + } + + /** + * Determines whether this class can be used for retrieving a URL. + * + * @static + * @since 2.7.0 + * @since 3.7.0 Combined with the fsockopen transport and switched to stream_socket_client(). + * + * @param array $args Optional. Array of request arguments. Default empty array. + * @return bool False means this class can not be used, true means it can. + */ + public static function test( $args = array() ) { + if ( ! function_exists( 'stream_socket_client' ) ) + return false; + + $is_ssl = isset( $args['ssl'] ) && $args['ssl']; + + if ( $is_ssl ) { + if ( ! extension_loaded( 'openssl' ) ) + return false; + if ( ! function_exists( 'openssl_x509_parse' ) ) + return false; + } + + /** + * Filters whether streams can be used as a transport for retrieving a URL. + * + * @since 2.7.0 + * + * @param bool $use_class Whether the class can be used. Default true. + * @param array $args Request arguments. + */ + return apply_filters( 'use_streams_transport', true, $args ); + } +} + +/** + * Deprecated HTTP Transport method which used fsockopen. + * + * This class is not used, and is included for backward compatibility only. + * All code should make use of WP_Http directly through its API. + * + * @see WP_HTTP::request + * + * @since 2.7.0 + * @deprecated 3.7.0 Please use WP_HTTP::request() directly + */ +class WP_HTTP_Fsockopen extends WP_HTTP_Streams { + // For backward compatibility for users who are using the class directly. +}