mirror of
https://github.com/jtesta/ssh-audit.git
synced 2024-11-16 13:35:39 +01:00
Specify error when couldn't get banner. Test for timeout and retry cases.
This commit is contained in:
Andris Raugulis
parent
dd3ca9688e
commit
44c1d4827c
16
ssh-audit.py
16
ssh-audit.py
@ -1141,16 +1141,17 @@ class SSH(object): # pylint: disable=too-few-public-methods
|
||||
sys.exit(1)
|
||||
|
||||
def get_banner(self, sshv=2):
|
||||
# type: (int) -> Tuple[Optional[SSH.Banner], List[text_type]]
|
||||
# type: (int) -> Tuple[Optional[SSH.Banner], List[text_type], Optional[str]]
|
||||
banner = 'SSH-{0}-OpenSSH_7.3'.format('1.5' if sshv == 1 else '2.0')
|
||||
rto = self.__sock.gettimeout()
|
||||
self.__sock.settimeout(0.7)
|
||||
s, e = self.recv()
|
||||
self.__sock.settimeout(rto)
|
||||
if s < 0:
|
||||
return self.__banner, self.__header
|
||||
return self.__banner, self.__header, e
|
||||
if self.__state < self.SM_BANNER_SENT:
|
||||
self.send_banner(banner)
|
||||
e = None
|
||||
while self.__banner is None:
|
||||
if not s > 0:
|
||||
s, e = self.recv()
|
||||
@ -1166,14 +1167,14 @@ class SSH(object): # pylint: disable=too-few-public-methods
|
||||
continue
|
||||
self.__header.append(line)
|
||||
s = 0
|
||||
return self.__banner, self.__header
|
||||
return self.__banner, self.__header, e
|
||||
|
||||
def recv(self, size=2048):
|
||||
# type: (int) -> Tuple[int, Optional[str]]
|
||||
try:
|
||||
data = self.__sock.recv(size)
|
||||
except socket.timeout:
|
||||
return (-1, 'timeout')
|
||||
return (-1, 'timed out')
|
||||
except socket.error as e:
|
||||
if e.args[0] in (errno.EAGAIN, errno.EWOULDBLOCK):
|
||||
return (0, 'retry')
|
||||
@ -1971,9 +1972,12 @@ def audit(aconf, sshv=None):
|
||||
if sshv is None:
|
||||
sshv = 2 if aconf.ssh2 else 1
|
||||
err = None
|
||||
banner, header = s.get_banner(sshv)
|
||||
banner, header, err = s.get_banner(sshv)
|
||||
if banner is None:
|
||||
err = '[exception] did not receive banner.'
|
||||
if err is None:
|
||||
err = '[exception] did not receive banner.'
|
||||
else:
|
||||
err = '[exception] did not receive banner: {0}'.format(err)
|
||||
if err is None:
|
||||
packet_type, payload = s.read_packet(sshv)
|
||||
if packet_type < 0:
|
||||
|
||||
@ -17,46 +17,91 @@ class TestErrors(object):
|
||||
conf.batch = True
|
||||
return conf
|
||||
|
||||
def _audit(self, spy, conf=None, sysexit=True):
|
||||
if conf is None:
|
||||
conf = self._conf()
|
||||
spy.begin()
|
||||
if sysexit:
|
||||
with pytest.raises(SystemExit):
|
||||
self.audit(conf)
|
||||
else:
|
||||
self.audit(conf)
|
||||
lines = spy.flush()
|
||||
return lines
|
||||
|
||||
def test_connection_refused(self, output_spy, virtual_socket):
|
||||
vsocket = virtual_socket
|
||||
vsocket.errors['connect'] = socket.error(61, 'Connection refused')
|
||||
output_spy.begin()
|
||||
with pytest.raises(SystemExit):
|
||||
self.audit(self._conf())
|
||||
lines = output_spy.flush()
|
||||
lines = self._audit(output_spy)
|
||||
assert len(lines) == 1
|
||||
assert 'Connection refused' in lines[-1]
|
||||
|
||||
def test_connection_timeout(self, output_spy, virtual_socket):
|
||||
vsocket = virtual_socket
|
||||
vsocket.errors['connect'] = socket.timeout('timed out')
|
||||
lines = self._audit(output_spy)
|
||||
assert len(lines) == 1
|
||||
assert 'timed out' in lines[-1]
|
||||
|
||||
def test_recv_empty(self, output_spy, virtual_socket):
|
||||
vsocket = virtual_socket
|
||||
lines = self._audit(output_spy)
|
||||
assert len(lines) == 1
|
||||
assert 'did not receive banner' in lines[-1]
|
||||
|
||||
def test_recv_timeout(self, output_spy, virtual_socket):
|
||||
vsocket = virtual_socket
|
||||
vsocket.rdata.append(socket.timeout('timed out'))
|
||||
lines = self._audit(output_spy)
|
||||
assert len(lines) == 1
|
||||
assert 'did not receive banner' in lines[-1]
|
||||
assert 'timed out' in lines[-1]
|
||||
|
||||
def test_recv_retry_till_timeout(self, output_spy, virtual_socket):
|
||||
vsocket = virtual_socket
|
||||
vsocket.rdata.append(socket.error(35, 'Resource temporarily unavailable'))
|
||||
vsocket.rdata.append(socket.error(35, 'Resource temporarily unavailable'))
|
||||
vsocket.rdata.append(socket.error(35, 'Resource temporarily unavailable'))
|
||||
vsocket.rdata.append(socket.timeout('timed out'))
|
||||
lines = self._audit(output_spy)
|
||||
assert len(lines) == 1
|
||||
assert 'did not receive banner' in lines[-1]
|
||||
assert 'timed out' in lines[-1]
|
||||
|
||||
def test_recv_retry_till_reset(self, output_spy, virtual_socket):
|
||||
vsocket = virtual_socket
|
||||
vsocket.rdata.append(socket.error(35, 'Resource temporarily unavailable'))
|
||||
vsocket.rdata.append(socket.error(35, 'Resource temporarily unavailable'))
|
||||
vsocket.rdata.append(socket.error(35, 'Resource temporarily unavailable'))
|
||||
vsocket.rdata.append(socket.error(54, 'Connection reset by peer'))
|
||||
lines = self._audit(output_spy)
|
||||
assert len(lines) == 1
|
||||
assert 'did not receive banner' in lines[-1]
|
||||
assert 'reset by peer' in lines[-1]
|
||||
|
||||
def test_connection_closed_before_banner(self, output_spy, virtual_socket):
|
||||
vsocket = virtual_socket
|
||||
vsocket.rdata.append(socket.error(54, 'Connection reset by peer'))
|
||||
output_spy.begin()
|
||||
with pytest.raises(SystemExit):
|
||||
self.audit(self._conf())
|
||||
lines = output_spy.flush()
|
||||
lines = self._audit(output_spy)
|
||||
assert len(lines) == 1
|
||||
assert 'did not receive banner' in lines[-1]
|
||||
assert 'reset by peer' in lines[-1]
|
||||
|
||||
def test_connection_closed_after_header(self, output_spy, virtual_socket):
|
||||
vsocket = virtual_socket
|
||||
vsocket.rdata.append(b'header line 1\n')
|
||||
vsocket.rdata.append(b'header line 2\n')
|
||||
vsocket.rdata.append(socket.error(54, 'Connection reset by peer'))
|
||||
output_spy.begin()
|
||||
with pytest.raises(SystemExit):
|
||||
self.audit(self._conf())
|
||||
lines = output_spy.flush()
|
||||
lines = self._audit(output_spy)
|
||||
assert len(lines) == 3
|
||||
assert 'did not receive banner' in lines[-1]
|
||||
assert 'reset by peer' in lines[-1]
|
||||
|
||||
def test_connection_closed_after_banner(self, output_spy, virtual_socket):
|
||||
vsocket = virtual_socket
|
||||
vsocket.rdata.append(b'SSH-2.0-ssh-audit-test\r\n')
|
||||
vsocket.rdata.append(socket.error(54, 'Connection reset by peer'))
|
||||
output_spy.begin()
|
||||
with pytest.raises(SystemExit):
|
||||
self.audit(self._conf())
|
||||
lines = output_spy.flush()
|
||||
lines = self._audit(output_spy)
|
||||
assert len(lines) == 2
|
||||
assert 'error reading packet' in lines[-1]
|
||||
assert 'reset by peer' in lines[-1]
|
||||
@ -64,10 +109,7 @@ class TestErrors(object):
|
||||
def test_empty_data_after_banner(self, output_spy, virtual_socket):
|
||||
vsocket = virtual_socket
|
||||
vsocket.rdata.append(b'SSH-2.0-ssh-audit-test\r\n')
|
||||
output_spy.begin()
|
||||
with pytest.raises(SystemExit):
|
||||
self.audit(self._conf())
|
||||
lines = output_spy.flush()
|
||||
lines = self._audit(output_spy)
|
||||
assert len(lines) == 2
|
||||
assert 'error reading packet' in lines[-1]
|
||||
assert 'empty' in lines[-1]
|
||||
@ -76,10 +118,7 @@ class TestErrors(object):
|
||||
vsocket = virtual_socket
|
||||
vsocket.rdata.append(b'SSH-2.0-ssh-audit-test\r\n')
|
||||
vsocket.rdata.append(b'xxx\n')
|
||||
output_spy.begin()
|
||||
with pytest.raises(SystemExit):
|
||||
self.audit(self._conf())
|
||||
lines = output_spy.flush()
|
||||
lines = self._audit(output_spy)
|
||||
assert len(lines) == 2
|
||||
assert 'error reading packet' in lines[-1]
|
||||
assert 'xxx' in lines[-1]
|
||||
@ -87,10 +126,7 @@ class TestErrors(object):
|
||||
def test_non_ascii_banner(self, output_spy, virtual_socket):
|
||||
vsocket = virtual_socket
|
||||
vsocket.rdata.append(b'SSH-2.0-ssh-audit-test\xc3\xbc\r\n')
|
||||
output_spy.begin()
|
||||
with pytest.raises(SystemExit):
|
||||
self.audit(self._conf())
|
||||
lines = output_spy.flush()
|
||||
lines = self._audit(output_spy)
|
||||
assert len(lines) == 3
|
||||
assert 'error reading packet' in lines[-1]
|
||||
assert 'ASCII' in lines[-2]
|
||||
@ -100,10 +136,7 @@ class TestErrors(object):
|
||||
vsocket = virtual_socket
|
||||
vsocket.rdata.append(b'SSH-2.0-ssh-audit-test\r\n')
|
||||
vsocket.rdata.append(b'\x81\xff\n')
|
||||
output_spy.begin()
|
||||
with pytest.raises(SystemExit):
|
||||
self.audit(self._conf())
|
||||
lines = output_spy.flush()
|
||||
lines = self._audit(output_spy)
|
||||
assert len(lines) == 2
|
||||
assert 'error reading packet' in lines[-1]
|
||||
assert '\\x81\\xff' in lines[-1]
|
||||
@ -112,12 +145,9 @@ class TestErrors(object):
|
||||
vsocket = virtual_socket
|
||||
vsocket.rdata.append(b'SSH-1.3-ssh-audit-test\r\n')
|
||||
vsocket.rdata.append(b'Protocol major versions differ.\n')
|
||||
output_spy.begin()
|
||||
with pytest.raises(SystemExit):
|
||||
conf = self._conf()
|
||||
conf.ssh1, conf.ssh2 = True, False
|
||||
self.audit(conf)
|
||||
lines = output_spy.flush()
|
||||
conf = self._conf()
|
||||
conf.ssh1, conf.ssh2 = True, False
|
||||
lines = self._audit(output_spy, conf)
|
||||
assert len(lines) == 3
|
||||
assert 'error reading packet' in lines[-1]
|
||||
assert 'major versions differ' in lines[-1]
|
||||
|
||||
Loading…
Reference in New Issue
Block a user