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<?php |
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declare(strict_types=1); |
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/* |
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* This file is part of Badcow DNS Library. |
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* |
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* (c) Samuel Williams <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Badcow\DNS\Rdata; |
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use Badcow\DNS\Parser\Tokens; |
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use Badcow\DNS\Validator; |
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/** |
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* {@link https://tools.ietf.org/html/rfc2535#section-3.1}. |
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*/ |
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class KEY implements RdataInterface |
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{ |
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use RdataTrait; |
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const TYPE = 'KEY'; |
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const TYPE_CODE = 25; |
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/** |
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* {@link https://tools.ietf.org/html/rfc4034#section-2.1.1}. |
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* |
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* @var int |
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*/ |
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protected $flags; |
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/** |
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* @var int |
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*/ |
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protected $protocol; |
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/** |
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* The Algorithm field identifies the public key's cryptographic |
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* algorithm and determines the format of the Public Key field. |
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* {@link https://tools.ietf.org/html/rfc4034#section-2.1.3}. |
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* |
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* @var int |
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*/ |
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protected $algorithm; |
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/** |
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* The Public Key field is a Base64 encoding of the Public Key. |
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* Whitespace is allowed within the Base64 text. |
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* {@link https://tools.ietf.org/html/rfc4034#section-2.1.4}. |
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* |
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* @var string |
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*/ |
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protected $publicKey; |
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/** |
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* @param int $flags |
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*/ |
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public function setFlags(int $flags): void |
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{ |
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$this->flags = $flags; |
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} |
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/** |
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* @param int $protocol |
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*/ |
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public function setProtocol(int $protocol): void |
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{ |
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$this->protocol = $protocol; |
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} |
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/** |
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* @param int $algorithm |
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*/ |
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public function setAlgorithm(int $algorithm): void |
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{ |
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$this->algorithm = $algorithm; |
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} |
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/** |
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* @param string $publicKey |
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* |
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* @throws \InvalidArgumentException |
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*/ |
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public function setPublicKey(string $publicKey): void |
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{ |
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if (!Validator::isBase64Encoded($publicKey)) { |
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throw new \InvalidArgumentException('The public key must be a valid base64 encoded string.'); |
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} |
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$this->publicKey = (string) preg_replace('/[^a-zA-Z0-9\/+=]/', '', $publicKey); |
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} |
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/** |
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* @return int |
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*/ |
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public function getFlags(): int |
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{ |
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return $this->flags; |
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} |
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/** |
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* @return int |
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*/ |
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public function getProtocol(): int |
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{ |
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return $this->protocol; |
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} |
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/** |
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* @return int |
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*/ |
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public function getAlgorithm(): int |
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{ |
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return $this->algorithm; |
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} |
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/** |
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* @return string |
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*/ |
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public function getPublicKey(): string |
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{ |
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return $this->publicKey; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function toText(): string |
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{ |
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return sprintf('%d %d %d %s', $this->flags, $this->protocol, $this->algorithm, $this->publicKey); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function toWire(): string |
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{ |
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$encoded = pack('nCC', $this->flags, $this->protocol, $this->algorithm); |
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$encoded .= $this->publicKey; |
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return $encoded; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public static function fromText(string $text): RdataInterface |
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{ |
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$rdata = explode(Tokens::SPACE, $text); |
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$key = new static(); |
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$key->setFlags((int) array_shift($rdata)); |
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$key->setProtocol((int) array_shift($rdata)); |
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$key->setAlgorithm((int) array_shift($rdata)); |
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$key->setPublicKey(implode('', $rdata)); |
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return $key; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public static function fromWire(string $rdata): RdataInterface |
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{ |
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$integers = unpack('nflags/Cprotocol/Calgorithm', $rdata); |
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$key = new static(); |
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$key->setFlags((int) $integers['flags']); |
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$key->setProtocol((int) $integers['protocol']); |
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$key->setAlgorithm((int) $integers['algorithm']); |
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$key->setPublicKey(substr($rdata, 4)); |
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return $key; |
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} |
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} |
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Badcow /
DNS
