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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) 2014-2017 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\Component\Core\Util\Ecc\Crypto\EcDH; |
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/* |
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* ********************************************************************* |
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* Copyright (C) 2012 Matyas Danter |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining |
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* a copy of this software and associated documentation files (the "Software"), |
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* to deal in the Software without restriction, including without limitation |
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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* and/or sell copies of the Software, and to permit persons to whom the |
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* Software is furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included |
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* in all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES |
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* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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* OTHER DEALINGS IN THE SOFTWARE. |
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* *********************************************************************** |
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*/ |
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use Jose\Component\Core\Util\Ecc\Crypto\Key\PrivateKey; |
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use Jose\Component\Core\Util\Ecc\Crypto\Key\PublicKey; |
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use Jose\Component\Core\Util\Ecc\Primitives\Curve; |
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/** |
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* This class is the implementation of ECDH. |
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* EcDH is safe key exchange and achieves |
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* that a key is transported securely between two parties. |
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* The key then can be hashed and used as a basis in |
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* a dual encryption scheme, along with AES for faster |
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* two- way encryption. |
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*/ |
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final class EcDH |
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{ |
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/** |
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* @param Curve $curve |
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* @param PublicKey $publicKey |
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* @param PrivateKey $privateKey |
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* |
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* @return \GMP |
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*/ |
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public static function computeSharedKey(Curve $curve, PublicKey $publicKey, PrivateKey $privateKey): \GMP |
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{ |
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return $curve->mul($publicKey->getPoint(), $privateKey->getSecret())->getX(); |
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} |
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} |
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Spomky-Labs /
jose
