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<?php |
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namespace MadWizard\WebAuthn\Pki\Jwt; |
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use MadWizard\WebAuthn\Exception\ParseException; |
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use MadWizard\WebAuthn\Format\Base64UrlEncoding; |
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use MadWizard\WebAuthn\Format\ByteBuffer; |
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class Jwt implements JwtInterface |
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{ |
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/** |
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* @var array |
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*/ |
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private $header; |
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/** |
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* @var array |
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*/ |
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private $body; |
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/** |
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* @var ByteBuffer |
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*/ |
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private $signedData; |
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/** |
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* @var ByteBuffer |
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*/ |
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private $signature; |
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public function __construct(string $token) |
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{ |
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$parts = explode('.', $token); |
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[$headerJson, $bodyJson, $signature] = self::decodeToken($parts); |
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$header = self::jsonDecode($headerJson); |
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$body = self::jsonDecode($bodyJson); |
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if (!is_array($header)) { |
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throw new ParseException('Expecting header to be a json object.'); |
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} |
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if (!is_array($body)) { |
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throw new ParseException('Expecting body to be a json object.'); |
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} |
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$this->header = $header; |
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$this->body = $body; |
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$this->signedData = new ByteBuffer($parts[0] . '.' . $parts[1]); |
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$this->signature = new ByteBuffer($signature); |
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} |
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private static function decodeToken(array $parts): array |
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{ |
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if (count($parts) !== 3) { |
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throw new ParseException('Invalid JWT'); |
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} |
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return [ |
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Base64UrlEncoding::decode($parts[0]), |
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Base64UrlEncoding::decode($parts[1]), |
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Base64UrlEncoding::decode($parts[2]), |
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]; |
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} |
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private static function jsonDecode(string $json): array |
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{ |
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$decoded = json_decode($json, true); |
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if ($decoded === null && json_last_error() !== JSON_ERROR_NONE) { |
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throw new ParseException(sprintf('JSON parse error in JWT: %s.', json_last_error_msg())); |
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} |
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return $decoded; |
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} |
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public function getHeader(): array |
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{ |
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return $this->header; |
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} |
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public function getBody(): array |
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{ |
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return $this->body; |
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} |
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public function getSignedData(): ByteBuffer |
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{ |
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return $this->signedData; |
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} |
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public function getSignature(): ByteBuffer |
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{ |
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return $this->signature; |
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} |
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} |
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madwizard-org /
webauthn-server
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