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<?php declare(strict_types=1); |
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namespace MiladRahimi\Jwt\Cryptography\Algorithms\Hmac; |
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use MiladRahimi\Jwt\Cryptography\Signer; |
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use MiladRahimi\Jwt\Cryptography\Verifier; |
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use MiladRahimi\Jwt\Exceptions\InvalidKeyException; |
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use MiladRahimi\Jwt\Exceptions\InvalidSignatureException; |
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use MiladRahimi\Jwt\Exceptions\SigningException; |
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use ValueError; |
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abstract class AbstractHmac implements Signer, Verifier |
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{ |
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protected static string $name; |
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protected string $key; |
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protected ?string $kid; |
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public function __construct(string $key, ?string $kid = null) |
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{ |
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$this->key = $key; |
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$this->kid = $kid; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function sign(string $message): string |
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{ |
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try { |
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if (strlen($this->key) < 32 || strlen($this->key) > 6144) { |
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throw new InvalidKeyException('Key length must be between 32 and 6144'); |
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} |
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return hash_hmac($this->algorithm(), $message, "$this->key", true); |
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} catch (ValueError|InvalidKeyException $e) { |
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throw new SigningException('Cannot sign the signature', 0, $e); |
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} |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function verify(string $plain, string $signature): void |
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{ |
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if ($signature !== $this->sign($plain)) { |
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throw new InvalidSignatureException(); |
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} |
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} |
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/** |
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* Generate algorithm name based on the key name |
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*/ |
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protected function algorithm(): string |
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{ |
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return 'sha' . substr($this->name(), 2); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function name(): string |
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{ |
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return static::$name; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function kid(): string |
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{ |
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return $this->key; |
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} |
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public function getKey(): string |
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{ |
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return $this->key; |
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} |
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} |
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miladrahimi /
php-jwt
