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<?php |
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|
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declare(strict_types=1); |
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|
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/* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2014-2021 Spomky-Labs |
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* |
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* This software may be modified and distributed under the terms |
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* of the MIT license. See the LICENSE file for details. |
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*/ |
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|
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namespace WP_DEFENDER_VENDOR\Webauthn\Util; |
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|
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use WP_DEFENDER_VENDOR\Cose\Algorithm\Signature\ECDSA; |
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use WP_DEFENDER_VENDOR\Cose\Algorithm\Signature\Signature; |
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|
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/** |
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* This class fixes the signature of the ECDSA based algorithms. |
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* |
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* @internal |
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* |
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* @see https://www.w3.org/TR/webauthn/#signature-attestation-types |
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*/ |
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abstract class CoseSignatureFixer |
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{ |
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public static function fix(string $signature, Signature $algorithm): string |
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{ |
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switch ($algorithm::identifier()) { |
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case ECDSA\ES256K::ID: |
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case ECDSA\ES256::ID: |
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if (64 === mb_strlen($signature, '8bit')) { |
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return $signature; |
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} |
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|
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return ECDSA\ECSignature::fromAsn1($signature, 64); //TODO: fix this hardcoded value by adding a dedicated method for the algorithms |
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case ECDSA\ES384::ID: |
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if (96 === mb_strlen($signature, '8bit')) { |
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return $signature; |
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} |
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|
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return ECDSA\ECSignature::fromAsn1($signature, 96); |
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case ECDSA\ES512::ID: |
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if (132 === mb_strlen($signature, '8bit')) { |
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return $signature; |
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} |
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|
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return ECDSA\ECSignature::fromAsn1($signature, 132); |
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} |
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|
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return $signature; |
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} |
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} |
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|
