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<?php declare(strict_types=1); namespace Lcobucci\JWT\Signer; use Lcobucci\JWT\Signer\Ecdsa\MultibyteStringConverter; use Lcobucci\JWT\Signer\Ecdsa\SignatureConverter; use const OPENSSL_KEYTYPE_EC; abstract class Ecdsa extends OpenSSL { public function __construct( private readonly SignatureConverter $converter = new MultibyteStringConverter(), ) { } final public function sign(string $payload, Key $key): string { return $this->converter->fromAsn1( $this->createSignature($key->contents(), $key->passphrase(), $payload), $this->pointLength(), ); } final public function verify(string $expected, string $payload, Key $key): bool { return $this->verifySignature( $this->converter->toAsn1($expected, $this->pointLength()), $payload, $key->contents(), ); } /** {@inheritDoc} */ final protected function guardAgainstIncompatibleKey(int $type, int $lengthInBits): void { if ($type !== OPENSSL_KEYTYPE_EC) { throw InvalidKeyProvided::incompatibleKeyType( self::KEY_TYPE_MAP[OPENSSL_KEYTYPE_EC], self::KEY_TYPE_MAP[$type], ); } $expectedKeyLength = $this->expectedKeyLength(); if ($lengthInBits !== $expectedKeyLength) { throw InvalidKeyProvided::incompatibleKeyLength($expectedKeyLength, $lengthInBits); } } /** * @internal * * @return positive-int */ abstract public function expectedKeyLength(): int; /** * Returns the length of each point in the signature, so that we can calculate and verify R and S points properly * * @internal * * @return positive-int */ abstract public function pointLength(): int; }
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