1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356
|
from core.weexceptions import FatalException, ChannelException
from core.loggers import log, dlog
from core import messages
from core import modules
from core import config
from core.module import Status
import utils
from mako import template
try:
import gnureadline as readline
except ImportError:
import readline
import cmd
import glob
import os
import shlex
import atexit
import sys
class CmdModules(cmd.Cmd):
identchars = cmd.Cmd.identchars + ':'
doc_header = "Modules and commands (type :help <module>):"
nohelp = "[!] No help on %s"
def complete(self, text, state):
"""Return the next possible completion for 'text'.
If a command has not been entered, then complete against command list.
Otherwise try to call complete_<command> to get list of completions.
"""
if state == 0:
origline = readline.get_line_buffer()
# Offer completion just for commands that starts
# with the trigger :
if origline and not origline.startswith(':'):
return None
line = origline.lstrip().lstrip(':')
stripped = len(origline) - len(line)
begidx = readline.get_begidx() - stripped
endidx = readline.get_endidx() - stripped
if begidx>0:
cmd, args, foo = self.parseline(line)
if cmd == '':
compfunc = self.completedefault
else:
try:
compfunc = getattr(self, 'complete_' + cmd)
except AttributeError:
compfunc = self.completedefault
else:
compfunc = self.completenames
self.completion_matches = compfunc(text, line, begidx, endidx)
try:
if self.completion_matches[state].startswith('alias_'):
if self.session.get('default_shell') == 'shell_php':
return self.completion_matches[state][6:]
else:
return ''
else:
return self.completion_matches[state]
except IndexError:
return None
def onecmd(self, line):
"""Interpret the argument as though it had been typed in response
to the prompt.
This may be overridden, but should not normally need to be;
see the precmd() and postcmd() methods for useful execution hooks.
The return value is a flag indicating whether interpretation of
commands by the interpreter should stop.
"""
cmd, arg, line = self.parseline(line)
if not line:
return self.emptyline()
if cmd in (None, ''):
return self.default(line)
self.lastcmd = line
if line == 'EOF' :
#self.lastcmd = ''
raise EOFError()
if cmd:
# Try running module command
try:
func = getattr(self, 'do_' + cmd.lstrip(':'))
except AttributeError:
# If there is no module command, check if we have a PHP shelli
# And in case try running alias command
if self.session.get('default_shell') == 'shell_php' or cmd.lstrip(':') == 'cd':
try:
func = getattr(self, 'do_alias_' + cmd.lstrip(':'))
except AttributeError:
pass
else:
return func(arg, cmd)
else:
return func(arg, cmd)
return self.default(line)
def _print_modules(self):
data = []
for module_group, names in modules.loaded_tree.items():
for module_name in names:
data.append([ ':%s' % module_name, modules.loaded[module_name].info.get('description', '') ])
if data: log.info(utils.prettify.tablify(data, table_border = False))
def _print_command_replacements(self):
data = []
for module_name, module in modules.loaded.items():
if module.aliases:
data.append([ ', '.join(module.aliases), module_name ])
if data: log.info(utils.prettify.tablify(data, table_border = False))
def do_help(self, arg, command):
"""Fixed help."""
print()
self._print_modules()
if self.session['shell_sh']['status'] == Status.RUN: print(); return
log.info(messages.terminal.help_no_shell)
self._print_command_replacements()
print()
class Terminal(CmdModules):
"""Weevely Terminal"""
def __init__(self, session):
cmd.Cmd.__init__(self)
self.session = session
self.prompt = 'weevely> '
# Load all available modules
self._load_modules()
# Load history file
self._load_history()
# Set a nice intro
self.intro = template.Template(
messages.terminal.welcome_to_s
).render(
path = self.session.get('path'),
conn_info = session.get_connection_info(),
version = messages.version,
default_shell = self.session.get('default_shell')
)
def emptyline(self):
"""Disable repetition of last command."""
pass
def precmd(self, line):
"""Before to execute a line commands. Confirm shell availability and get basic system infos """
dlog.info('>>>> %s' % line)
# Skip slack check is not a remote command
if not line or any(
line.startswith(cmnd) for cmnd in (
':set',
':unset',
':show',
':help'
)
):
return line
# Trigger the shell_sh/shell_php probe if
# 1. We never tried to raise shells (shell_sh = IDLE)
# 2. The basic intepreter shell_php is not running.
if (
self.session['shell_sh']['status'] == Status.IDLE or
self.session['shell_php']['status'] != Status.RUN
):
# We're implying that no shell is set, so reset default shell
self.session['default_shell'] = None
# Force shell_php to idle to avoid to be skipped by shell_sh
self.session['shell_php']['status'] = Status.IDLE
# Catch every exception which prevent the shell setup.
# We imply that at every channel change (proxy, channel name)
# this piece of code will be executed.
try:
self.session['shell_sh']['status'] = modules.loaded['shell_sh'].setup()
except ChannelException as e:
log.error(str(e))
return ''
# Set default_shell in any case (could have been changed runtime)
for shell in ('shell_sh', 'shell_php'):
if self.session[shell]['status'] == Status.RUN:
self.session['default_shell'] = shell
break
# Kill the execution if no shell were loaded
if not self.session.get('default_shell'):
log.error(messages.terminal.backdoor_unavailable)
return ''
# TODO: do not print this every loop
# Print an introductory string with php shell
#if self.session.get('default_shell') == 'shell_php':
# log.info(messages.terminal.welcome_no_shell)
# self._print_command_replacements()
# log.info('\nweevely> %s' % line)
# Get hostname and whoami if not set
if not self.session['system_info']['results'].get('hostname'):
modules.loaded['system_info'].run_argv([ "-info", "hostname"])
if not self.session['system_info']['results'].get('whoami'):
modules.loaded['system_info'].run_argv(["-info", "whoami"])
# Get current working directory if not set
# Should be OK to repeat this every time if not set.
if not self.session['file_cd']['results'].get('cwd'):
self.do_file_cd(".")
return line
def postcmd(self, stop, line):
default_shell = self.session.get('default_shell')
if not default_shell:
self.prompt = 'weevely> '
else:
if default_shell == 'shell_sh':
prompt = '$'
elif default_shell == 'shell_php':
prompt = 'PHP>'
else:
prompt = '?'
# Build next prompt, last command could have changed the cwd
self.prompt = '%s %s ' % (self.session.get_connection_info(), prompt)
def default(self, line):
"""Default command line send."""
if not line: return
default_shell = self.session.get('default_shell')
if not default_shell: return
result = modules.loaded[default_shell].run_argv([line])
if not result: return
# Clean trailing newline if existent to prettify output
result = result[:-1] if (
isinstance(result, str) and
result.endswith('\n')
) else result
log.info(result)
def do_show(self, line, cmd):
"""Command "show" which prints session variables"""
self.session.print_to_user(line)
def do_set(self, line, cmd):
"""Command "set" to set session variables."""
try:
args = shlex.split(line)
except Exception as e:
import traceback; log.debug(traceback.format_exc())
log.warning(messages.generic.error_parsing_command_s % str(e))
# Set the setting
else:
if len(args) < 2:
log.warning(messages.terminal.set_usage)
elif len(args) >= 2:
args[1] = ' '.join(args[1:])
self.session.set(args[0], args[1])
def do_unset(self, line, cmd):
"""Command "unset" to unset session variables."""
# Print all settings that startswith args[0]
if not line:
log.warning(messages.terminal.unset_usage)
# Set the setting
else:
self.session.unset(line)
def _load_modules(self):
"""Load all modules assigning corresponding do_* functions."""
for module_name, module_class in modules.loaded.items():
# Set module.do_terminal_module() function as terminal
# self.do_modulegroup_modulename()
setattr(
Terminal, 'do_%s' %
(module_name), module_class.run_cmdline)
# Set module.do_alias() function as terminal
# self.do_alias() for every defined `Module.aliases`.
for alias in module_class.aliases:
setattr(
Terminal, 'do_alias_%s' %
(alias), module_class.run_alias)
setattr(
Terminal, 'help_%s' %
(alias), module_class.help)
# Set module.help() function as terminal
# self.help_modulegroup_modulename()
setattr(
Terminal, 'help_%s' %
(module_name), module_class.help)
def _load_history(self):
"""Load history file and register dump on exit."""
# Create a file without truncating it in case it exists.
open(config.history_path, 'a').close()
readline.set_history_length(100)
try:
readline.read_history_file(config.history_path)
except IOError:
pass
atexit.register(readline.write_history_file,
config.history_path)
|