File: src/Curve25519/EdwardsSecretKey.php

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File: src/Curve25519/EdwardsSecretKey.php
Role: Class source
Content type: text/plain
Description: Class source
Class: Easy PHP ECC
Encrypt, decrypt and sign messages with PHPECC
Author: By
Last change:
Date: 2 months ago
Size: 2,801 bytes
 

Contents

Class file image Download
<?php
declare(strict_types=1);
namespace
ParagonIE\EasyECC\Curve25519;

use
Mdanter\Ecc\Crypto\EcDH\EcDHInterface;
use
Mdanter\Ecc\Crypto\Key\PrivateKeyInterface;
use
Mdanter\Ecc\Crypto\Key\PublicKeyInterface;
use
Mdanter\Ecc\Primitives\GeneratorPoint;
use
ParagonIE\ConstantTime\Binary;
use
ParagonIE\EasyECC\Exception\NotImplementedException;

/**
 * Class EdwardsSecretKey
 * @package ParagonIE\EasyECC\Curve25519
 */
class EdwardsSecretKey implements PrivateKeyInterface
{
   
/** @var string $secretKey */
   
protected $secretKey;

   
/**
     * EdwardsSecretKey constructor.
     *
     * @param string $keyMaterial
     * @throws \SodiumException
     */
   
public function __construct(string $keyMaterial)
    {
        if (
Binary::safeStrlen($keyMaterial) === SODIUM_CRYPTO_SIGN_KEYPAIRBYTES) {
           
$this->secretKey = \sodium_crypto_sign_secretkey($keyMaterial);
        } else if (
Binary::safeStrlen($keyMaterial) === SODIUM_CRYPTO_SIGN_SECRETKEYBYTES) {
           
$this->secretKey = $keyMaterial;
        } else if (
Binary::safeStrlen($keyMaterial) === SODIUM_CRYPTO_SIGN_SEEDBYTES) {
           
$keypair = \sodium_crypto_sign_seed_keypair($keyMaterial);
           
$this->secretKey = \sodium_crypto_sign_secretkey($keypair);
        } else {
            throw new \
SodiumException('Invalid secret key provided');
        }
    }

   
/**
     * @return string
     */
   
public function getAsString(): string
   
{
        return
$this->secretKey;
    }

   
/**
     * @return MontgomerySecretKey
     * @throws \SodiumException
     */
   
public function getMontgomery(): MontgomerySecretKey
   
{
        return new
MontgomerySecretKey(
            \
sodium_crypto_sign_ed25519_sk_to_curve25519($this->secretKey)
        );
    }

   
/**
     * @return PublicKeyInterface
     * @throws \SodiumException
     */
   
public function getPublicKey(): PublicKeyInterface
   
{
        return new
EdwardsPublicKey(
            \
sodium_crypto_sign_publickey_from_secretkey($this->secretKey)
        );
    }

   
/**
     * @return GeneratorPoint
     * @throws NotImplementedException
     */
   
public function getPoint(): GeneratorPoint
   
{
        throw new
NotImplementedException('This is not part of the curve25519 interface');
    }

   
/**
     * @return \GMP
     * @throws NotImplementedException
     */
   
public function getSecret(): \GMP
   
{
        throw new
NotImplementedException('This is not part of the curve25519 interface');
    }

   
/**
     * @param PublicKeyInterface $recipient
     * @return EcDHInterface
     * @throws NotImplementedException
     */
   
public function createExchange(PublicKeyInterface $recipient): EcDHInterface
   
{
        throw new
NotImplementedException('This is not part of the curve25519 interface');
    }
}

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