def _parse_userauth_request(self, m):
if not self.transport.server_mode:
# er, uh... what?
m = Message()
m.add_byte(chr(MSG_USERAUTH_FAILURE))
m.add_string('none')
m.add_boolean(0)
self.transport._send_message(m)
return
if self.authenticated:
# ignore
return
username = m.get_string()
service = m.get_string()
method = m.get_string()
self.transport._log(DEBUG, 'Auth request (type=%s) service=%s, username=%s' % (method, service, username))
if service != 'ssh-connection':
self._disconnect_service_not_available()
return
if (self.auth_username is not None) and (self.auth_username != username):
self.transport._log(WARNING, 'Auth rejected because the client attempted to change username in mid-flight')
self._disconnect_no_more_auth()
return
self.auth_username = username
if method == 'none':
result = self.transport.server_object.check_auth_none(username)
elif method == 'password':
changereq = m.get_boolean()
password = m.get_string()
try:
password = password.decode('UTF-8')
except UnicodeError:
# some clients/servers expect non-utf-8 passwords!
# in this case, just return the raw byte string.
pass
if changereq:
# always treated as failure, since we don't support changing passwords, but collect
# the list of valid auth types from the callback anyway
self.transport._log(DEBUG, 'Auth request to change passwords (rejected)')
newpassword = m.get_string()
try:
newpassword = newpassword.decode('UTF-8', 'replace')
except UnicodeError:
pass
result = AUTH_FAILED
else:
result = self.transport.server_object.check_auth_password(username, password)
elif method == 'publickey':
sig_attached = m.get_boolean()
keytype = m.get_string()
keyblob = m.get_string()
try:
key = self.transport._key_info[keytype](Message(keyblob))
except SSHException, e:
self.transport._log(INFO, 'Auth rejected: public key: %s' % str(e))
key = None
except:
def test_2_decode(self):
msg = Message(self.__a)
self.assertEquals(msg.get_int(), 23)
self.assertEquals(msg.get_int(), 123789456)
self.assertEquals(msg.get_string(), 'q')
self.assertEquals(msg.get_string(), 'hello')
self.assertEquals(msg.get_string(), 'x' * 1000)
msg = Message(self.__b)
self.assertEquals(msg.get_boolean(), True)
self.assertEquals(msg.get_boolean(), False)
self.assertEquals(msg.get_byte(), '\xf3')
self.assertEquals(msg.get_bytes(2), '\x00\x3f')
self.assertEquals(msg.get_list(), ['huey', 'dewey', 'louie'])
msg = Message(self.__c)
self.assertEquals(msg.get_int64(), 5)
self.assertEquals(msg.get_int64(), 0xf5e4d3c2b109L)
self.assertEquals(msg.get_mpint(), 17)
self.assertEquals(msg.get_mpint(), 0xf5e4d3c2b109L)
self.assertEquals(msg.get_mpint(), -0x65e4d3c2b109L)
def _parse_userauth_request(self, m):
if not self.transport.server_mode:
# er, uh... what?
m = Message()
m.add_byte(chr(MSG_USERAUTH_FAILURE))
m.add_string('none')
m.add_boolean(0)
self.transport._send_message(m)
return
if self.authenticated:
# ignore
return
username = m.get_string()
service = m.get_string()
method = m.get_string()
self.transport._log(DEBUG, 'Auth request (type=%s) service=%s, username=%s' % (method, service, username))
if service != 'ssh-connection':
self._disconnect_service_not_available()
return
if (self.auth_username is not None) and (self.auth_username != username):
self.transport._log(WARNING, 'Auth rejected because the client attempted to change username in mid-flight')
self._disconnect_no_more_auth()
return
self.auth_username = username
if method == 'none':
result = self.transport.server_object.check_auth_none(username)
elif method == 'password':
changereq = m.get_boolean()
password = m.get_string()
try:
password = password.decode('UTF-8')
except UnicodeError:
# some clients/servers expect non-utf-8 passwords!
# in this case, just return the raw byte string.
pass
if changereq:
# always treated as failure, since we don't support changing passwords, but collect
# the list of valid auth types from the callback anyway
self.transport._log(DEBUG, 'Auth request to change passwords (rejected)')
newpassword = m.get_string()
try:
newpassword = newpassword.decode('UTF-8', 'replace')
except UnicodeError:
pass
result = AUTH_FAILED
else:
result = self.transport.server_object.check_auth_password(username, password)
elif method == 'publickey':
sig_attached = m.get_boolean()
keytype = m.get_string()
keyblob = m.get_string()
try:
key = self.transport._key_info[keytype](Message(keyblob))
except SSHException as e:
self.transport._log(INFO, 'Auth rejected: public key: %s' % str(e))
key = None
except:
self.transport._log(INFO, 'Auth rejected: unsupported or mangled public key')
key = None
if key is None:
self._disconnect_no_more_auth()
return
# first check if this key is okay... if not, we can skip the verify
result = self.transport.server_object.check_auth_publickey(username, key)
if result != AUTH_FAILED:
# key is okay, verify it
if not sig_attached:
# client wants to know if this key is acceptable, before it
# signs anything... send special "ok" message
m = Message()
m.add_byte(chr(MSG_USERAUTH_PK_OK))
m.add_string(keytype)
m.add_string(keyblob)
self.transport._send_message(m)
return
sig = Message(m.get_string())
blob = self._get_session_blob(key, service, username)
if not key.verify_ssh_sig(blob, sig):
self.transport._log(INFO, 'Auth rejected: invalid signature')
result = AUTH_FAILED
elif method == 'keyboard-interactive':
lang = m.get_string()
submethods = m.get_string()
result = self.transport.server_object.check_auth_interactive(username, submethods)
if isinstance(result, InteractiveQuery):
# make interactive query instead of response
self._interactive_query(result)
return
else:
result = self.transport.server_object.check_auth_none(username)
# okay, send result
self._send_auth_result(username, method, result)
def _parse_userauth_request(self, m):
if not self.transport.server_mode:
# er, uh... what?
m = Message()
m.add_byte(chr(MSG_USERAUTH_FAILURE))
m.add_string('none')
m.add_boolean(0)
self.transport._send_message(m)
return
if self.authenticated:
# ignore
return
username = m.get_string()
service = m.get_string()
method = m.get_string()
self.transport._log(
DEBUG, 'Auth request (type=%s) service=%s, username=%s' %
(method, service, username))
if service != 'ssh-connection':
self._disconnect_service_not_available()
return
if (self.auth_username
is not None) and (self.auth_username != username):
self.transport._log(
WARNING,
'Auth rejected because the client attempted to change username in mid-flight'
)
self._disconnect_no_more_auth()
return
self.auth_username = username
if method == 'none':
result = self.transport.server_object.check_auth_none(username)
elif method == 'password':
changereq = m.get_boolean()
password = m.get_string()
try:
password = password.decode('UTF-8')
except UnicodeError:
# some clients/servers expect non-utf-8 passwords!
# in this case, just return the raw byte string.
pass
if changereq:
# always treated as failure, since we don't support changing passwords, but collect
# the list of valid auth types from the callback anyway
self.transport._log(
DEBUG, 'Auth request to change passwords (rejected)')
newpassword = m.get_string()
try:
newpassword = newpassword.decode('UTF-8', 'replace')
except UnicodeError:
pass
result = AUTH_FAILED
else:
result = self.transport.server_object.check_auth_password(
username, password)
elif method == 'publickey':
sig_attached = m.get_boolean()
keytype = m.get_string()
keyblob = m.get_string()
try:
key = self.transport._key_info[keytype](Message(keyblob))
except SSHException, e:
self.transport._log(INFO,
'Auth rejected: public key: %s' % str(e))
key = None
except:
