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<?php
declare(strict_types=1);
namespace Lcobucci\JWT\Signer\Ecdsa;
/**
* Manipulates the result of a ECDSA signature (points R and S) according to the
* JWA specs.
*
* OpenSSL creates a signature using the ASN.1 format and, according the JWA specs,
* the signature for JWTs must be the concatenated values of points R and S (in
* big-endian octet order).
*
* @internal
*
* @see https://tools.ietf.org/html/rfc7518#page-9
* @see https://en.wikipedia.org/wiki/Abstract_Syntax_Notation_One
*/
interface SignatureConverter
{
/**
* Converts the signature generated by OpenSSL into what JWA defines
*
* @return non-empty-string
*
* @throws ConversionFailed When there was an issue during the format conversion.
*/
public function fromAsn1(string $signature, int $length): string;
/**
* Converts the JWA signature into something OpenSSL understands
*
* @param non-empty-string $points
*
* @return non-empty-string
*
* @throws ConversionFailed When there was an issue during the format conversion.
*/
public function toAsn1(string $points, int $length): string;
}
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