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<?php |
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/** |
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* This file is part of the Phalcon Framework. |
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* |
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* For the full copyright and license information, please view the LICENSE.md |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace Phalcon\Http\JWT\Signer; |
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use Phalcon\Http\JWT\Exceptions\UnsupportedAlgorithmException; |
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use function hash_equals; |
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use function hash_hmac; |
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use function str_replace; |
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/** |
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* Class Hmac |
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*/ |
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class Hmac extends AbstractSigner |
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{ |
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/** |
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* Hmac constructor. |
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* |
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* @param string $algo |
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* |
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* @throws UnsupportedAlgorithmException |
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*/ |
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public function __construct(string $algo = "sha512") |
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{ |
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$supported = [ |
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"sha512" => 1, |
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"sha384" => 1, |
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"sha256" => 1, |
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]; |
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if (!isset($supported[$algo])) { |
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1 |
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throw new UnsupportedAlgorithmException( |
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1 |
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"Unsupported HMAC algorithm" |
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); |
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}; |
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$this->algo = $algo; |
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} |
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/** |
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* Return the value that is used for the "alg" header |
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* |
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* @return string |
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*/ |
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public function getAlgHeader(): string |
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{ |
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return "HS" . str_replace("sha", "", $this->algo); |
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} |
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/** |
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* Sign a payload using the passphrase |
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* |
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* @param string $payload |
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* @param string $passphrase |
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* |
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* @return string |
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*/ |
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public function sign(string $payload, string $passphrase): string |
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{ |
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return hash_hmac($this->getAlgorithm(), $payload, $passphrase, true); |
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} |
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/** |
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* Verify a passed source with a payload and passphrase |
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* |
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* @param string $source |
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* @param string $payload |
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* @param string $passphrase |
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* |
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* @return bool |
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*/ |
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public function verify(string $source, string $payload, string $passphrase): bool |
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{ |
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return hash_equals($source, $this->sign($payload, $passphrase)); |
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} |
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} |
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niden /
cardoe
