function TlsHelper::certNameMatcher

Convert certificate name into matching function.

Parameters

string $certName CN/SAN:

1 call to TlsHelper::certNameMatcher()

TlsHelper::checkCertificateHost in vendor/composer/composer/src/Composer/Util/TlsHelper.php

Match hostname against a certificate.

File

vendor/composer/composer/src/Composer/Util/TlsHelper.php, line 172

Class

TlsHelper

@author Chris Smith <chris@cs278.org>

Namespace

Composer\Util

Code

private static function certNameMatcher(string $certName) : ?callable {
    $wildcards = substr_count($certName, '*');
    if (0 === $wildcards) {
        // Literal match.
        return static function ($hostname) use ($certName) : bool {
            return $hostname === $certName;
        };
    }
    if (1 === $wildcards) {
        $components = explode('.', $certName);
        if (3 > count($components)) {
            // Must have 3+ components
            return null;
        }
        $firstComponent = $components[0];
        // Wildcard must be the last character.
        if ('*' !== $firstComponent[strlen($firstComponent) - 1]) {
            return null;
        }
        $wildcardRegex = preg_quote($certName);
        $wildcardRegex = str_replace('\\*', '[a-z0-9-]+', $wildcardRegex);
        $wildcardRegex = "{^{$wildcardRegex}\$}";
        return static function ($hostname) use ($wildcardRegex) : bool {
            return Preg::isMatch($wildcardRegex, $hostname);
        };
    }
    return null;
}