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<?php |
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/* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2014-2016 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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namespace Jose\Algorithm\Signature; |
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use Assert\Assertion; |
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use Base64Url\Base64Url; |
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use Jose\Algorithm\SignatureAlgorithmInterface; |
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use Jose\Object\JWKInterface; |
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/** |
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* Class Ed25519. |
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*/ |
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class EdDSA implements SignatureAlgorithmInterface |
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{ |
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/** |
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* {@inheritdoc} |
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*/ |
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public function sign(JWKInterface $key, $data) |
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{ |
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$this->checkKey($key); |
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Assertion::true($key->has('d'), 'The key is not private'); |
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$secret = Base64Url::decode($key->get('d')); |
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$public = Base64Url::decode($key->get('x')); |
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switch ($key->get('crv')) { |
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case 'Ed25519': |
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return ed25519_sign($data, $secret, $public); |
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default: |
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throw new \InvalidArgumentException('Unsupported curve'); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function verify(JWKInterface $key, $data, $signature) |
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{ |
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$this->checkKey($key); |
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$public = Base64Url::decode($key->get('x')); |
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switch ($key->get('crv')) { |
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case 'Ed25519': |
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return ed25519_sign_open($data, $public, $signature); |
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default: |
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throw new \InvalidArgumentException('Unsupported curve'); |
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} |
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} |
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/** |
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* @param JWKInterface $key |
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*/ |
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private function checkKey(JWKInterface $key) |
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{ |
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Assertion::eq($key->get('kty'), 'OKP', 'Wrong key type.'); |
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Assertion::true($key->has('x'), 'The key parameter "x" is missing.'); |
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Assertion::true($key->has('crv'), 'The key parameter "crv" is missing.'); |
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Assertion::inArray($key->get('crv'), ['Ed25519'], 'Unsupported curve'); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getAlgorithmName() |
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{ |
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return 'EdDSA'; |
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} |
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} |
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Spomky-Labs /
jose
