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<?php |
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namespace Rogierw\RwAcme\Support; |
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use Rogierw\RwAcme\Exceptions\DomainValidationException; |
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use Rogierw\RwAcme\Interfaces\HttpClientInterface; |
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use RuntimeException; |
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use Spatie\Dns\Dns; |
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class LocalChallengeTest |
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{ |
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private const DEFAULT_NAMESERVER = 'dns.google.com'; |
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public static function http( |
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string $domain, |
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string $token, |
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string $keyAuthorization, |
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HttpClientInterface $httpClient |
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): void { |
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$response = $httpClient->get($domain . '/.well-known/acme-challenge/' . $token, maxRedirects: 1); |
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$body = $response->getBody(); |
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if (is_array($body)) { |
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$body = json_encode($body, JSON_THROW_ON_ERROR); |
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} |
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if (trim($body) === $keyAuthorization) { |
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return; |
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} |
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throw DomainValidationException::localHttpChallengeTestFailed( |
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$domain, |
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$response->getHttpResponseCode() |
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); |
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} |
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public static function dns(string $domain, string $name, string $value): void |
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{ |
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try { |
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$challenge = sprintf('%s.%s', $name, $domain); |
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// Try to validate TXT records directly. |
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$nameserver = self::getNameserver($domain); |
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$txtRecords = self::getRecords($nameserver, $challenge, DNS_TXT); |
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if (self::validateTxtRecords($txtRecords, $value)) { |
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return; |
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} |
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// Try to validate a CNAME record pointing to a TXT record containing the correct value. |
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$cnameRecords = self::getRecords($nameserver, $challenge, DNS_CNAME); |
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if (self::validateCnameRecords($cnameRecords, $value)) { |
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return; |
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} |
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} catch (RuntimeException) { |
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// An exception can be thrown by the Dns class when a lookup fails. |
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} |
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throw DomainValidationException::localDnsChallengeTestFailed($domain); |
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} |
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private static function validateTxtRecords(array $records, string $value): bool |
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{ |
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foreach ($records as $record) { |
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if ($record->txt() === $value) { |
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return true; |
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} |
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} |
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return false; |
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} |
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private static function validateCnameRecords(array $records, string $value): bool |
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{ |
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foreach ($records as $record) { |
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$nameserver = self::getNameserver($record->target()); |
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$txtRecords = self::getRecords($nameserver, $record->target(), DNS_TXT); |
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if (self::validateTxtRecords($txtRecords, $value)) { |
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return true; |
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} |
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// If this is another CNAME, follow it. |
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$cnameRecords = self::getRecords($nameserver, $record->target(), DNS_CNAME); |
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if (!empty($cnameRecords)) { |
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if (self::validateCnameRecords($cnameRecords, $value)) { |
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return true; |
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} |
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} |
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} |
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return false; |
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} |
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private static function getNameserver(string $domain): string |
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{ |
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$dnsResolver = new Dns(); |
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$result = $dnsResolver->getRecords($domain, DNS_NS); |
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return empty($result) |
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? self::DEFAULT_NAMESERVER |
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: $result[0]->target(); |
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} |
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private static function getRecords(string $nameserver, string $name, int $dnsType): array |
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{ |
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$dnsResolver = new Dns(); |
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return $dnsResolver |
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->useNameserver($nameserver) |
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->getRecords($name, $dnsType); |
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} |
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} |
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RogierW /
rw-acme-client
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