123 lines
3.0 KiB
PHP
123 lines
3.0 KiB
PHP
<?php
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/**
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* The MIT License (MIT)
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*
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* Copyright (c) 2014 BitPay, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* 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 in all
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* 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 OR
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* 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 THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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namespace Bitpay;
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use Bitpay\Util\Base58;
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use Bitpay\Util\Gmp;
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use Bitpay\Util\Util;
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/**
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* @package Bitcore
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*/
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class SinKey extends Key
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{
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// Type 2 (ephemeral)
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const SIN_TYPE = '02';
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// Always the prefix!
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// (well, right now)
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const SIN_VERSION = '0F';
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/**
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* @var string
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*/
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protected $value;
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/**
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* @var PublicKey
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*/
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protected $publicKey;
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/**
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* @return string
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*/
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public function __toString()
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{
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return (string) $this->value;
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}
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/**
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* @param PublicKey
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* @return SinKey
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*/
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public function setPublicKey(PublicKey $publicKey)
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{
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$this->publicKey = $publicKey;
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return $this;
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}
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/**
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* Generates a Service Identification Number (SIN), see:
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* https://en.bitcoin.it/wiki/Identity_protocol_v1
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*
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* @return SinKey
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*/
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public function generate()
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{
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if (is_null($this->publicKey)) {
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throw new \Exception('Public Key has not been set');
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}
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$compressedValue = $this->publicKey->getX();
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if (empty($compressedValue)) {
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throw new \Exception('The Public Key needs to be generated.');
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}
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$step1 = Util::sha256(Gmp::gmpBinconv($this->publicKey->getX()), true);
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$step2 = Util::ripe160($step1);
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$step3 = sprintf(
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'%s%s%s',
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self::SIN_VERSION,
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self::SIN_TYPE,
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$step2
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);
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$step4 = Util::twoSha256(Gmp::gmpBinconv($step3), true);
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$step5 = substr(bin2hex($step4), 0, 8);
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$step6 = $step3.$step5;
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$this->value = Base58::encode($step6);
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return $this;
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}
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/**
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* Checks to make sure that this SIN is a valid object.
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*
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* @return boolean
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*/
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public function isValid()
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{
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return (!is_null($this->value) && (substr($this->value, 0, 1) == 'T'));
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}
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}
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