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SSH2: fixes for noisy channels

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terrafrost 2021-10-09 13:21:09 -05:00
parent b29f134c24
commit 1fab947f01
1 changed files with 11 additions and 20 deletions
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29
phpseclib/Net/SSH2.php
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@ -2829,26 +2829,12 @@ class Net_SSH2
return false; return false;
} }
$response = $this->_get_binary_packet(); $this->channel_status[NET_SSH2_CHANNEL_EXEC] = NET_SSH2_MSG_CHANNEL_REQUEST;
if ($response === false) { if (!$this->_get_channel_packet(NET_SSH2_CHANNEL_EXEC)) {
$this->bitmap = 0;
user_error('Connection closed by server');
return false;
}
if (!strlen($response)) {
return false;
}
list(, $type) = unpack('C', $this->_string_shift($response, 1));
switch ($type) {
case NET_SSH2_MSG_CHANNEL_SUCCESS:
break;
case NET_SSH2_MSG_CHANNEL_FAILURE:
default:
user_error('Unable to request pseudo-terminal'); user_error('Unable to request pseudo-terminal');
return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION); return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
} }
$this->in_request_pty_exec = true; $this->in_request_pty_exec = true;
} }
@ -3911,10 +3897,15 @@ class Net_SSH2
$result = $client_channel == $channel ? true : $this->_get_channel_packet($client_channel, $skip_extended); $result = $client_channel == $channel ? true : $this->_get_channel_packet($client_channel, $skip_extended);
$this->_on_channel_open(); $this->_on_channel_open();
return $result; return $result;
//case NET_SSH2_MSG_CHANNEL_OPEN_FAILURE: case NET_SSH2_MSG_CHANNEL_OPEN_FAILURE:
default:
user_error('Unable to open channel'); user_error('Unable to open channel');
return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION); return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
default:
if ($client_channel == $channel) {
user_error('Unexpected response to open request');
return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
}
return $this->_get_channel_packet($client_channel, $skip_extended);
} }
break; break;
case NET_SSH2_MSG_IGNORE: case NET_SSH2_MSG_IGNORE: