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JWS.php
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<?php
declare(strict_types=1);
namespace Jose\Component\Signature;
use function count;
use InvalidArgumentException;
use Jose\Component\Core\JWT;
class JWS implements JWT
{
/**
* @var Signature[]
*/
private array $signatures = [];
public function __construct(
private readonly ?string $payload,
private readonly ?string $encodedPayload = null,
private readonly bool $isPayloadDetached = false
) {
}
public function getPayload(): ?string
{
return $this->payload;
}
/**
* Returns true if the payload is detached.
*/
public function isPayloadDetached(): bool
{
return $this->isPayloadDetached;
}
/**
* Returns the Base64Url encoded payload. If the payload is detached, this method returns null.
*/
public function getEncodedPayload(): ?string
{
if ($this->isPayloadDetached() === true) {
return null;
}
return $this->encodedPayload;
}
/**
* Returns the signatures associated with the JWS.
*
* @return Signature[]
*/
public function getSignatures(): array
{
return $this->signatures;
}
/**
* Returns the signature at the given index.
*/
public function getSignature(int $id): Signature
{
if (isset($this->signatures[$id])) {
return $this->signatures[$id];
}
throw new InvalidArgumentException('The signature does not exist.');
}
/**
* This method adds a signature to the JWS object. Its returns a new JWS object.
*
* @internal
*/
public function addSignature(
string $signature,
array $protectedHeader,
?string $encodedProtectedHeader,
array $header = []
): self {
$jws = clone $this;
$jws->signatures[] = new Signature($signature, $protectedHeader, $encodedProtectedHeader, $header);
return $jws;
}
/**
* Returns the number of signature associated with the JWS.
*/
public function countSignatures(): int
{
return count($this->signatures);
}
/**
* This method splits the JWS into a list of JWSs. It is only useful when the JWS contains more than one signature
* (JSON General Serialization).
*
* @return JWS[]
*/
public function split(): array
{
$result = [];
foreach ($this->signatures as $signature) {
$jws = new self($this->payload, $this->encodedPayload, $this->isPayloadDetached);
$jws = $jws->addSignature(
$signature->getSignature(),
$signature->getProtectedHeader(),
$signature->getEncodedProtectedHeader(),
$signature->getHeader()
);
$result[] = $jws;
}
return $result;
}
}