mirror of
https://github.com/WordPress/WordPress.git
synced 2024-08-15 01:07:38 +02:00
Replaces unsecure links in documentation and translator comments with their secure versions. Props johnpgreen, netweb Fixes #36993 Built from https://develop.svn.wordpress.org/trunk@37674 git-svn-id: http://core.svn.wordpress.org/trunk@37640 1a063a9b-81f0-0310-95a4-ce76da25c4cd
152 lines
3.9 KiB
PHP
152 lines
3.9 KiB
PHP
<?php
|
|
/**
|
|
* SSL utilities for Requests
|
|
*
|
|
* @package Requests
|
|
* @subpackage Utilities
|
|
*/
|
|
|
|
/**
|
|
* SSL utilities for Requests
|
|
*
|
|
* Collection of utilities for working with and verifying SSL certificates.
|
|
*
|
|
* @package Requests
|
|
* @subpackage Utilities
|
|
*/
|
|
class Requests_SSL {
|
|
/**
|
|
* Verify the certificate against common name and subject alternative names
|
|
*
|
|
* Unfortunately, PHP doesn't check the certificate against the alternative
|
|
* names, leading things like 'https://www.github.com/' to be invalid.
|
|
* Instead
|
|
*
|
|
* @see https://tools.ietf.org/html/rfc2818#section-3.1 RFC2818, Section 3.1
|
|
*
|
|
* @throws Requests_Exception On not obtaining a match for the host (`fsockopen.ssl.no_match`)
|
|
* @param string $host Host name to verify against
|
|
* @param array $cert Certificate data from openssl_x509_parse()
|
|
* @return bool
|
|
*/
|
|
public static function verify_certificate($host, $cert) {
|
|
// Calculate the valid wildcard match if the host is not an IP address
|
|
$parts = explode('.', $host);
|
|
if (ip2long($host) === false) {
|
|
$parts[0] = '*';
|
|
}
|
|
$wildcard = implode('.', $parts);
|
|
|
|
$has_dns_alt = false;
|
|
|
|
// Check the subjectAltName
|
|
if (!empty($cert['extensions']) && !empty($cert['extensions']['subjectAltName'])) {
|
|
$altnames = explode(',', $cert['extensions']['subjectAltName']);
|
|
foreach ($altnames as $altname) {
|
|
$altname = trim($altname);
|
|
if (strpos($altname, 'DNS:') !== 0) {
|
|
continue;
|
|
}
|
|
|
|
$has_dns_alt = true;
|
|
|
|
// Strip the 'DNS:' prefix and trim whitespace
|
|
$altname = trim(substr($altname, 4));
|
|
|
|
// Check for a match
|
|
if (self::match_domain($host, $altname) === true) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Fall back to checking the common name if we didn't get any dNSName
|
|
// alt names, as per RFC2818
|
|
if (!$has_dns_alt && !empty($cert['subject']['CN'])) {
|
|
// Check for a match
|
|
if (self::match_domain($host, $cert['subject']['CN']) === true) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Verify that a reference name is valid
|
|
*
|
|
* Verifies a dNSName for HTTPS usage, (almost) as per Firefox's rules:
|
|
* - Wildcards can only occur in a name with more than 3 components
|
|
* - Wildcards can only occur as the last character in the first
|
|
* component
|
|
* - Wildcards may be preceded by additional characters
|
|
*
|
|
* We modify these rules to be a bit stricter and only allow the wildcard
|
|
* character to be the full first component; that is, with the exclusion of
|
|
* the third rule.
|
|
*
|
|
* @param string $reference Reference dNSName
|
|
* @return boolean Is the name valid?
|
|
*/
|
|
public static function verify_reference_name($reference) {
|
|
$parts = explode('.', $reference);
|
|
|
|
// Check the first part of the name
|
|
$first = array_shift($parts);
|
|
|
|
if (strpos($first, '*') !== false) {
|
|
// Check that the wildcard is the full part
|
|
if ($first !== '*') {
|
|
return false;
|
|
}
|
|
|
|
// Check that we have at least 3 components (including first)
|
|
if (count($parts) < 2) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Check the remaining parts
|
|
foreach ($parts as $part) {
|
|
if (strpos($part, '*') !== false) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Nothing found, verified!
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Match a hostname against a dNSName reference
|
|
*
|
|
* @param string $host Requested host
|
|
* @param string $reference dNSName to match against
|
|
* @return boolean Does the domain match?
|
|
*/
|
|
public static function match_domain($host, $reference) {
|
|
// Check if the reference is blacklisted first
|
|
if (self::verify_reference_name($reference) !== true) {
|
|
return false;
|
|
}
|
|
|
|
// Check for a direct match
|
|
if ($host === $reference) {
|
|
return true;
|
|
}
|
|
|
|
// Calculate the valid wildcard match if the host is not an IP address
|
|
// Also validates that the host has 3 parts or more, as per Firefox's
|
|
// ruleset.
|
|
if (ip2long($host) === false) {
|
|
$parts = explode('.', $host);
|
|
$parts[0] = '*';
|
|
$wildcard = implode('.', $parts);
|
|
if ($wildcard === $reference) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
} |