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Switched from assertions to exceptions

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This commit is contained in:
Daniil Gentili 2016-08-06 12:14:28 +02:00
parent 6acaae877a
commit bcf0d6d012
2 changed files with 34 additions and 28 deletions
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16
TL.php
View File

@ -107,17 +107,17 @@ class TL
{
switch ($type_) {
case 'int':
assert(is_numeric($value));
assert(strlen(decbin($value)) <= 32);
if(!is_numeric($value)) throw new Exception("serialize_param: given value isn't numeric");
if(!(strlen(decbin($value)) <= 32)) throw new Exception("Given value is too long.");
fwrite($bytes_io, $this->struct->pack('<i', $value));
break;
case 'long':
assert(is_numeric($value));
if(!is_numeric($value)) throw new Exception("serialize_param: given value isn't numeric");
fwrite($bytes_io, $this->struct->pack('<q', $value));
break;
case 'int128':
case 'int256':
assert(is_string($value));
if(!is_string($value)) throw new Exception("serialize_param: given value isn't a string");
fwrite($bytes_io, $value);
break;
case 'string':
@ -144,7 +144,7 @@ class TL
*/
public function deserialize($bytes_io, $type_ = null, $subtype = null)
{
assert(get_resource_type($bytes_io) == 'file' || get_resource_type($bytes_io) == 'stream');
if(!(get_resource_type($bytes_io) == 'file' || get_resource_type($bytes_io) == 'stream')) throw new Exception("An invalid bytes_io handle provided.");
switch ($type_) {
case 'int':
$x = $this->struct->unpack('<i', fread($bytes_io, 4)) [0];
@ -167,7 +167,7 @@ class TL
case 'string':
case 'bytes':
$l = $this->struct->unpack('<B', fread($bytes_io, 1)) [0];
assert($l <= 254);
if($l > 254) throw new Exception("Length is too big");;
if ($l == 254) {
$long_len = $this->struct->unpack('<I', fread($bytes_io, 3).string2bin('\x00')) [0];
$x = fread($bytes_io, $long_len);
@ -176,10 +176,10 @@ class TL
$x = fread($bytes_io, $l);
fread($bytes_io, posmod(-($l + 1), 4));
}
assert(is_string($x));
if(!is_string($x)) throw new Exception("deserialize: generated value isn't a string");
break;
case 'vector':
assert($subtype != null);
if($subtype == null) throw new Exception("deserialize: subtype isn't null");;
$count = $this->struct->unpack('<l', fread($bytes_io, 4)) [0];
$x = [];
foreach (pyjslib_range($count) as $i) {

46
mtproto.php
View File

@ -1,5 +1,4 @@
<?php
set_include_path(get_include_path().PATH_SEPARATOR.dirname(__FILE__).DIRECTORY_SEPARATOR.'libpy2php');
require_once 'libpy2php.php';
require_once 'os_path.php';
@ -196,8 +195,8 @@ class Session
$encrypted_data = substr($packet, 28, -4 - 28);
list($aes_key, $aes_iv) = $this->aes_calculate($message_key, 'from server');
$decrypted_data = crypt::ige_decrypt($encrypted_data, $aes_key, $aes_iv);
assert((substr($decrypted_data, 0, 8 - 0) == $this->server_salt));
assert((substr($decrypted_data, 8, 16 - 8) == $this->session_id));
if (substr($decrypted_data, 0, 8) != $this->server_salt) throw new Exception("Server salt does not match.");
if (substr($decrypted_data, 8, 8) != $this->session_id) throw new Exception("Session id does not match.");
$message_id = substr($decrypted_data, 16, 24 - 16);
$seq_no = $this->struct->unpack('<I', substr($decrypted_data, 24, 28 - 24)) [0];
$message_data_length = $this->struct->unpack('<I', substr($decrypted_data, 28, 32 - 28)) [0];
@ -220,9 +219,13 @@ class Session
echo 'An error occurred while calling method '.$method.': '.$e->getMessage().PHP_EOL.'Stack trace:'.$e->getTraceAsString().PHP_EOL.'Retrying to call method...'.PHP_EOL.PHP_EOL;
continue;
}
if ($server_answer == null) {
throw new Exception("An error occurred while calling method ".$method.'.');
}
return $this->tl->deserialize(fopen_and_write('php://memory', 'rw+b', $server_answer));
}
throw new Exception("An error occurred while calling method ".$method.'.');
}
public function create_auth_key()
@ -230,6 +233,9 @@ class Session
$nonce = \phpseclib\Crypt\Random::string(16);
pyjslib_printnl('Requesting pq');
$ResPQ = $this->method_call('req_pq', ['nonce' => $nonce]);
if ($ResPQ['nonce'] !== $nonce) {
throw new Exception("Handshake: wrong nonce");
}
$server_nonce = $ResPQ['server_nonce'];
$public_key_fingerprint = (int) $ResPQ['server_public_key_fingerprints'][0];
$pq_bytes = $ResPQ['pq'];
@ -241,23 +247,23 @@ class Session
if ($p->compare($q) > 0) {
list($p, $q) = [$q, $p];
}
assert(($pq->equals($p->multiply($q))) && ($p < $q));
if(!(($pq->equals($p->multiply($q))) && ($p < $q))) throw new Exception("Handshake: couldn't compute p or q.");
pyjslib_printnl(sprintf('Factorization %s = %s * %s', $pq, $p, $q));
$p_bytes = $this->struct->pack('>I', (string) $p);
$q_bytes = $this->struct->pack('>I', (string) $q);
$p_bytes = $this->struct->pack('>Q', (string) $p);
$q_bytes = $this->struct->pack('>Q', (string) $q);
$f = file_get_contents(__DIR__.'/rsa.pub');
$key = new \phpseclib\Crypt\RSA();
$key->load($f);
$new_nonce = \phpseclib\Crypt\Random::string(32);
$data = $this->tl->serialize_obj('p_q_inner_data', ['pq' => $pq_bytes, 'p' => $p_bytes, 'q' => $q_bytes, 'nonce' => $nonce, 'server_nonce' => $server_nonce, 'new_nonce' => $new_nonce]);
$sha_digest = sha1($data, true);
$random_bytes = \phpseclib\Crypt\Random::string(((255 - strlen($data)) - strlen($sha_digest)));
$random_bytes = \phpseclib\Crypt\Random::string(255 - strlen($data) - strlen($sha_digest));
$to_encrypt = $sha_digest.$data.$random_bytes;
$encrypted_data = $key->_raw_encrypt($to_encrypt);
pyjslib_printnl('Starting Diffie Hellman key exchange');
$server_dh_params = $this->method_call('req_DH_params', ['nonce' => $nonce, 'server_nonce' => $server_nonce, 'p' => $p_bytes, 'q' => $q_bytes, 'public_key_fingerprint' => $public_key_fingerprint, 'encrypted_data' => $encrypted_data]);
assert($nonce == $server_dh_params['nonce']);
assert($server_nonce == $server_dh_params['server_nonce']);
if($nonce != $server_dh_params['nonce']) throw new Exception("Handshake: wrong nonce.");
if($server_nonce != $server_dh_params['server_nonce']) throw new Exception("Handshake: wrong server nonce.");
$encrypted_answer = $server_dh_params['encrypted_answer'];
$tmp_aes_key = sha1($new_nonce.$server_nonce, true).substr(sha1($server_nonce.$new_nonce, true), 0, 12);
$tmp_aes_iv = substr(sha1($server_nonce.$new_nonce, true), 12, 8).sha1($new_nonce.$new_nonce, true).substr($new_nonce, 0, 4);
@ -265,8 +271,8 @@ class Session
$answer_hash = substr($answer_with_hash, 0, 20);
$answer = substr($answer_with_hash, 20);
$server_DH_inner_data = deserialize(fopen_and_write('php://memory', 'rw+b', $answer));
assert($nonce == $server_DH_inner_data['nonce']);
assert($server_nonce == $server_DH_inner_data['server_nonce']);
if($nonce != $server_DH_inner_data['nonce']) throw new Exception("Handshake: wrong nonce");
if($server_nonce != $server_DH_inner_data['server_nonce']) throw new Exception("Handshake: wrong server nonce");;
$dh_prime_str = $server_DH_inner_data['dh_prime'];
$g = $server_DH_inner_data['g'];
$g_a_str = $server_DH_inner_data['g_a'];
@ -275,7 +281,7 @@ class Session
pyjslib_printnl(sprintf('Server-client time delta = %.1f s', $this->timedelta));
$dh_prime = $this->struct->unpack('>Q', $dh_prime_str);
$g_a = $this->struct->unpack('>Q', $g_a_str);
assert($this->PrimeModule->isprime($dh_prime));
if(!$this->PrimeModule->isprime($dh_prime)) throw new Exception("Handshake: dh_prime isn't a prime.");;
$retry_id = 0;
$b_str = \phpseclib\Crypt\Random::string(256);
$b = $this->struct->unpack('>Q', $b_str);
@ -294,10 +300,10 @@ class Session
$new_nonce_hash1 = substr(sha1($new_nonce.''.$auth_key_aux_hash, true), -16);
$new_nonce_hash2 = substr(sha1($new_nonce.''.$auth_key_aux_hash, true), -16);
$new_nonce_hash3 = substr(sha1($new_nonce.''.$auth_key_aux_hash, true), -16);
assert($Set_client_DH_params_answer['nonce'] == $nonce);
assert($Set_client_DH_params_answer['server_nonce'] == $server_nonce);
if($Set_client_DH_params_answer['nonce'] != $nonce) throw new Exception("Handshake: wrong nonce.");
if($Set_client_DH_params_answer['server_nonce'] != $server_nonce) throw new Exception("Handshake: wrong server nonce");;
if ($Set_client_DH_params_answer->name == 'dh_gen_ok') {
assert($Set_client_DH_params_answer['new_nonce_hash1'] == $new_nonce_hash1);
if($Set_client_DH_params_answer['new_nonce_hash1'] != $new_nonce_hash1) throw new Exception("Handshake: wrong new_nonce_hash1");;
pyjslib_printnl('Diffie Hellman key exchange processed successfully');
$this->server_salt = new strxor(substr($new_nonce, 0, 8 - 0), substr($server_nonce, 0, 8 - 0));
$this->auth_key = $auth_key_str;
@ -305,11 +311,11 @@ class Session
pyjslib_printnl('Auth key generated');
return 'Auth Ok';
} elseif (($Set_client_DH_params_answer->name == 'dh_gen_retry')) {
assert($Set_client_DH_params_answer['new_nonce_hash2'] == $new_nonce_hash2);
} elseif ($Set_client_DH_params_answer->name == 'dh_gen_retry') {
if($Set_client_DH_params_answer['new_nonce_hash2'] != $new_nonce_hash2) throw new Exception("Handshake: wrong new_nonce_hash_2");
pyjslib_printnl('Retry Auth');
} elseif (($Set_client_DH_params_answer->name == 'dh_gen_fail')) {
assert($Set_client_DH_params_answer['new_nonce_hash3'] == $new_nonce_hash3);
} elseif ($Set_client_DH_params_answer->name == 'dh_gen_fail') {
if($Set_client_DH_params_answer['new_nonce_hash3'] != $new_nonce_hash3) throw new Exception("Handshake: wrong new_nonce_hash_3");
pyjslib_printnl('Auth Failed');
throw new Exception('Auth Failed');
} else {