159 lines
6.5 KiB
PHP
159 lines
6.5 KiB
PHP
<?php
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/**
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* TON API module.
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*
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* This file is part of MadelineProto.
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* MadelineProto is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
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* MadelineProto is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Affero General Public License for more details.
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* You should have received a copy of the GNU General Public License along with MadelineProto.
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* If not, see <http://www.gnu.org/licenses/>.
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*
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* @author Daniil Gentili <daniil@daniil.it>
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* @copyright 2016-2020 Daniil Gentili <daniil@daniil.it>
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* @license https://opensource.org/licenses/AGPL-3.0 AGPLv3
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*
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* @link https://docs.madelineproto.xyz MadelineProto documentation
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*/
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namespace danog\MadelineProto\TON;
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use Amp\Deferred;
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use Amp\Socket\ConnectContext;
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use danog\MadelineProto\Magic;
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use danog\MadelineProto\MTProtoTools\Crypt;
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use danog\MadelineProto\Stream\ADNLTransport\ADNLStream;
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use danog\MadelineProto\Stream\Common\BufferedRawStream;
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use danog\MadelineProto\Stream\Common\CtrStream;
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use danog\MadelineProto\Stream\Common\HashedBufferedStream;
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use danog\MadelineProto\Stream\ConnectionContext;
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use danog\MadelineProto\Stream\StreamInterface;
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use danog\MadelineProto\Stream\Transport\DefaultStream;
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use danog\MadelineProto\TL\TL;
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use danog\MadelineProto\Tools;
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use Exception;
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use tgseclib\Crypt\DH;
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use tgseclib\Crypt\EC;
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use tgseclib\Crypt\EC\Curves\Curve25519;
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use tgseclib\Crypt\EC\PrivateKey;
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use tgseclib\Crypt\EC\PublicKey;
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use tgseclib\Math\BigInteger;
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class ADNLConnection
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{
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/**
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* TL serializer instance.
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*
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* @var TL
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*/
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private $TL;
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/**
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* ADNL stream instance.
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*
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* @var StreamInterface
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*/
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private $stream;
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/**
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* Request list.
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*
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* @var array
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*/
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private $requests = [];
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/**
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* Construct class.
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*
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* @param TL $TL TL instance
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*/
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public function __construct(TL $TL)
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{
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$this->TL = $TL;
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}
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/**
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* Connect to specified ADNL endpoint.
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*
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* @param array $endpoint Endpoint
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*
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* @return \Generator
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*/
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public function connect(array $endpoint): \Generator
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{
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if ($endpoint['_'] !== 'liteserver.desc') {
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throw new \InvalidArgumentException('Only liteservers are supported at the moment!');
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}
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if ($endpoint['id']['_'] !== 'pub.ed25519') {
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throw new \InvalidArgumentException('Only ECDH is supported at the moment!');
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}
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$random = Tools::random(256 - 32 - 64);
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//$random = strrev(hex2bin(strrev('9E7C27765D12CE634414F0875D55CE5C58E7A9D58CD45C57CAB516D1241B7864691E5B0AFC4ECB54BFF2CEFC2060F1D45F5B5DEB76A9EF6471D75816AAAEC83CD7DE39EE99B9E980B6C0D4565A916D00908613E63657D5539118F89A14FD73ABB8ECD3AC26C287EEBD0FA44F52B315F01DD60F486EFF4C5B4D71EA6F443358FF141E7294BBBB5D7C079F16BD46C28A12507E1948722E7121B94C3B5C7832ADE7')));
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$s1 = \substr($random, 0, 32);
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$s2 = \substr($random, 32, 32);
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$v1 = \substr($random, 64, 16);
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$v2 = \substr($random, 80, 16);
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$obf = ['decrypt' => ['key' => $s1, 'iv' => $v1], 'encrypt' => ['key' => $s2, 'iv' => $v2]];
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// Generating new private/public params
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$private = EC::createKey('Ed25519');
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$public = $private->getPublicKey();
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$public = \strrev(Tools::getVar($public, 'QA')[1]->toBytes());
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$private = \strrev(Tools::getVar($private, 'dA')->toBytes());
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$private = PrivateKey::loadFormat('MontgomeryPrivate', $private);
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// Transpose their public
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$key = $endpoint['id']['key'];
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$key[31] = $key[31] & \chr(127);
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$curve = new Curve25519();
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$modulo = Tools::getVar($curve, "modulo");
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$y = new BigInteger(\strrev($key), 256);
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$y2 = clone $y;
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$y = $y->add(Magic::$one);
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$y2 = $y2->subtract(Magic::$one);
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$y2 = $modulo->subtract($y2)->powMod(Magic::$one, $modulo);
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$y2 = $y2->modInverse($modulo);
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$key = \strrev($y->multiply($y2)->powMod(Magic::$one, $modulo)->toBytes());
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$peerPublic = PublicKey::loadFormat('MontgomeryPublic', $key);
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// Generate secret
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$secret = DH::computeSecret($private, $peerPublic);
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// Encrypting random with obf keys
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$digest = \hash('sha256', $random, true);
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$key = \substr($secret, 0, 16).\substr($digest, 16, 16);
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$iv = \substr($digest, 0, 4).\substr($secret, 20, 12);
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$encryptedRandom = Crypt::ctrEncrypt($random, $key, $iv);
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// Generating plaintext init payload
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$payload = \hash('sha256', yield from $this->TL->serializeObject(['type' => ''], $endpoint['id'], 'key'), true);
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$payload .= $public;
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$payload .= $digest;
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$payload .= $encryptedRandom;
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$ip = \long2ip(\unpack('V', Tools::packSignedInt($endpoint['ip']))[1]);
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$port = $endpoint['port'];
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$ctx = (new ConnectionContext())->setSocketContext(new ConnectContext())->setUri("tcp://{$ip}:{$port}")->addStream(DefaultStream::class)->addStream(BufferedRawStream::class)->addStream(CtrStream::class, $obf)->addStream(HashedBufferedStream::class, 'sha256')->addStream(ADNLStream::class);
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$this->stream = (yield from $ctx->getStream($payload));
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Tools::callFork((function (): \Generator {
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//yield Tools::sleep(1);
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while (true) {
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$buffer = yield $this->stream->getReadBuffer($length);
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if ($length) {
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$data = yield $buffer->bufferRead($length);
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$data = $this->TL->deserialize($data)[0];
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if ($data['_'] !== 'adnl.message.answer') {
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throw new Exception('Wrong answer type: '.$data['_']);
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}
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$this->requests[$data['query_id']]->resolve($this->TL->deserialize((string) $data['answer'])[0]);
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}
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}
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})());
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}
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/**
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* Send ADNL query.
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*
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* @param string $payload Payload to send
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*
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* @return \Generator
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*/
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public function query(string $payload): \Generator
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{
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$data = (yield from $this->TL->serializeObject(['type' => ''], ['_' => 'adnl.message.query', 'query_id' => $id = Tools::random(32), 'query' => $payload], ''));
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(yield $this->stream->getWriteBuffer(\strlen($data)))->bufferWrite($data);
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$this->requests[$id] = new Deferred();
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return $this->requests[$id]->promise();
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}
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}
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