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|
import os
import pytest
# from pytest import monkeypatch
from ctypes import cdll
from ctypes import c_void_p
from ctypes import pointer
from pam.__internals import PAM_SYSTEM_ERR
from pam.__internals import PAM_SUCCESS
from pam.__internals import PAM_SESSION_ERR
from pam.__internals import PAM_AUTH_ERR
from pam.__internals import PAM_USER_UNKNOWN
from pam.__internals import PAM_PROMPT_ECHO_OFF
from pam.__internals import PAM_PROMPT_ECHO_ON
from pam.__internals import PamConv
from pam.__internals import PamHandle
from pam.__internals import PamMessage
from pam.__internals import PamResponse
from pam.__internals import PamAuthenticator
from pam.__internals import my_conv
class MockPam:
def __init__(self, og):
self.og = og
self.og_pam_start = og.pam_start
self.PA_authenticate = og.authenticate
self.username = None
self.password = None
def authenticate(self, *args, **kwargs):
if len(args) > 0:
self.username = args[0]
if len(args) > 1:
self.password = args[1]
self.service = kwargs.get('service')
return self.PA_authenticate(*args, **kwargs)
def pam_start(self, service, username, conv, handle):
rv = self.og_pam_start(service, username, conv, handle)
return rv
def pam_authenticate(self, handle, flags):
if isinstance(self.username, str):
self.username = self.username.encode()
if isinstance(self.password, str):
self.password = self.password.encode()
if self.username == b'good_username' and self.password == b'good_password':
return PAM_SUCCESS
if self.username == b'unknown_username':
return PAM_USER_UNKNOWN
return PAM_AUTH_ERR
def pam_acct_mgmt(self, handle, flags):
# we don't test anything here (yet)
return PAM_SUCCESS
@pytest.fixture
def pam_obj(request, monkeypatch):
obj = PamAuthenticator()
MP = MockPam(obj)
monkeypatch.setattr(obj, 'authenticate', MP.authenticate)
monkeypatch.setattr(obj, 'pam_start', MP.pam_start)
monkeypatch.setattr(obj, 'pam_authenticate', MP.pam_authenticate)
monkeypatch.setattr(obj, 'pam_acct_mgmt', MP.pam_acct_mgmt)
yield obj
def test_PamHandle__void0():
x = PamHandle()
assert x.handle == c_void_p(0).value
def test_PamHandle__repr():
x = PamHandle()
assert '<PamHandle None>' == repr(x)
def test_PamMessage__repr():
x = PamMessage()
x.msg_style = 1
x.msg = b'1'
str(x)
assert "<PamMessage style: 1, content: b'1' >" == repr(x)
def test_PamResponse__repr():
x = PamResponse()
assert "<PamResponse code: 0, content: None >" == repr(x)
def test_PamAuthenticator__setup():
x = PamAuthenticator()
assert hasattr(x, 'reason')
def test_PamAuthenticator__requires_username_password(pam_obj):
with pytest.raises(TypeError):
pam_obj.authenticate()
def test_PamAuthenticator__requires_username_no_nulls(pam_obj):
with pytest.raises(ValueError):
pam_obj.authenticate(b'username\x00', b'password')
def test_PamAuthenticator__requires_password_no_nulls(pam_obj):
with pytest.raises(ValueError):
pam_obj.authenticate(b'username', b'password\x00')
def test_PamAuthenticator__requires_service_no_nulls(pam_obj):
with pytest.raises(ValueError):
pam_obj.authenticate(b'username', b'password', b'service\x00')
# TEST_* require a valid account
def test_PamAuthenticator__normal_success(pam_obj):
rv = pam_obj.authenticate('good_username', 'good_password')
assert True is rv
def test_PamAuthenticator__normal_password_failure(pam_obj):
rv = pam_obj.authenticate('good_username', 'bad_password')
assert False is rv
assert PAM_AUTH_ERR == pam_obj.code
def test_PamAuthenticator__normal_unknown_username(pam_obj):
rv = pam_obj.authenticate('unknown_username', '')
assert False is rv
assert PAM_USER_UNKNOWN == pam_obj.code
def test_PamAuthenticator__unset_DISPLAY(pam_obj):
os.environ['DISPLAY'] = ''
rv = pam_obj.authenticate('good_username', 'good_password')
assert True is rv
assert PAM_SUCCESS == pam_obj.code
def test_PamAuthenticator__env_requires_dict(pam_obj):
with pytest.raises(TypeError):
pam_obj.authenticate('good_username', 'good_password', env='value')
def test_PamAuthenticator__env_requires_key_no_nulls(pam_obj):
with pytest.raises(ValueError):
pam_obj.authenticate('good_username', 'good_password', env={b'\x00invalid_key': b'value'})
def test_PamAuthenticator__env_requires_value_no_nulls(pam_obj):
with pytest.raises(ValueError):
pam_obj.authenticate('good_username', 'good_password', env={b'key': b'\x00invalid_value'})
def test_PamAuthenticator__env_set(pam_obj):
rv = pam_obj.authenticate('good_username', 'good_password', env={'key': b'value'})
assert True is rv
assert PAM_SUCCESS == pam_obj.code
def test_PamAuthenticator__putenv_incomplete_setup(pam_obj):
pam_obj.handle = None
pam_obj.putenv('NAME=SomeValue')
rv = pam_obj.getenv('NAME')
assert PAM_SYSTEM_ERR == rv
def test_PamAuthenticator__putenv(pam_obj):
pam_obj.handle = PamHandle()
pam_conv = PamConv()
pam_obj.pam_start(b'', b'', pam_conv, pam_obj.handle)
pam_obj.putenv('NAME=SomeValue')
rv = pam_obj.getenv('NAME')
assert 'SomeValue' == rv
def test_PamAuthenticator__putenv_bad_key(pam_obj):
pam_obj.handle = PamHandle()
pam_conv = PamConv()
pam_obj.pam_start(b'', b'', pam_conv, pam_obj.handle)
with pytest.raises(Exception):
pam_obj.putenv('NAME\0=SomeValue')
def test_PamAuthenticator__putenv_missing_key_delete(pam_obj):
pam_obj.handle = PamHandle()
pam_conv = PamConv()
pam_obj.pam_start(b'', b'', pam_conv, pam_obj.handle)
with pytest.raises(Exception):
pam_obj.putenv('NAME')
def test_PamAuthenticator__getenv_missing_key(pam_obj):
pam_obj.handle = PamHandle()
pam_conv = PamConv()
pam_obj.pam_start(b'', b'', pam_conv, pam_obj.handle)
pam_obj.putenv('NAME=Foo')
pam_obj.putenv('NAME')
rv = pam_obj.getenv('NAME')
assert rv is None
def test_PamAuthenticator__getenv_missing_value(pam_obj):
pam_obj.handle = PamHandle()
pam_conv = PamConv()
pam_obj.pam_start(b'', b'', pam_conv, pam_obj.handle)
pam_obj.putenv('NAME=')
rv = pam_obj.getenv('NAME')
assert '' == rv
def test_PamAuthenticator__getenv(pam_obj):
pam_obj.handle = PamHandle()
pam_conv = PamConv()
pam_obj.pam_start(b'', b'', pam_conv, pam_obj.handle)
pam_obj.putenv('NAME=foo')
rv = pam_obj.getenv('NAME')
assert 'foo' == rv
def test_PamAuthenticator__getenv_stutter(pam_obj):
pam_obj.handle = PamHandle()
pam_conv = PamConv()
pam_obj.pam_start(b'', b'', pam_conv, pam_obj.handle)
pam_obj.putenv('NAME=NAME=foo')
rv = pam_obj.getenv('NAME')
assert 'NAME=foo' == rv
def test_PamAuthenticator__getenvlist_incomplete_setup(pam_obj):
pam_obj.handle = None
rv = pam_obj.getenvlist()
assert PAM_SYSTEM_ERR == rv
def test_PamAuthenticator__getenvlist(pam_obj):
pam_obj.handle = PamHandle()
pam_conv = PamConv()
pam_obj.pam_start(b'', b'', pam_conv, pam_obj.handle)
pam_obj.putenv('A=b')
pam_obj.putenv('C=d')
rv = pam_obj.getenvlist()
assert {'A': 'b', 'C': 'd'} == rv
def test_PamAuthenticator__getenvlist_missing_value(pam_obj):
pam_obj.handle = PamHandle()
pam_conv = PamConv()
pam_obj.pam_start(b'', b'', pam_conv, pam_obj.handle)
pam_obj.putenv('A=b')
pam_obj.putenv('C=')
rv = pam_obj.getenvlist()
assert {'A': 'b', 'C': ''} == rv
def test_PamAuthenticator__misc_setenv_incomplete_setup(pam_obj):
pam_obj.handle = None
rv = pam_obj.misc_setenv('NAME', 'SomeValue', False)
assert PAM_SYSTEM_ERR == rv
def test_PamAuthenticator__misc_setenv(pam_obj):
pam_obj.handle = PamHandle()
pam_conv = PamConv()
pam_obj.pam_start(b'', b'', pam_conv, pam_obj.handle)
rv = pam_obj.misc_setenv('NAME', 'SomeValue', False)
assert PAM_SUCCESS == rv
def test_PamAuthenticator__pam_end_incomplete_setup(pam_obj):
pam_obj.handle = None
rv = pam_obj.end()
assert PAM_SYSTEM_ERR == rv
def test_PamAuthenticator__pam_end(pam_obj):
pam_obj.handle = PamHandle()
pam_conv = PamConv()
pam_obj.pam_start(b'', b'', pam_conv, pam_obj.handle)
rv = pam_obj.end()
assert PAM_SUCCESS == rv
def test_PamAuthenticator__open_session_incomplete_setup(pam_obj):
pam_obj.handle = None
rv = pam_obj.open_session()
assert PAM_SYSTEM_ERR == rv
def test_PamAuthenticator__open_session_unauthenticated(pam_obj):
pam_obj.handle = PamHandle()
pam_conv = PamConv()
pam_obj.pam_start(b'', b'', pam_conv, pam_obj.handle)
rv = pam_obj.open_session()
assert PAM_SESSION_ERR == rv
def test_PamAuthenticator__close_session_incomplete_setup(pam_obj):
pam_obj.handle = None
rv = pam_obj.close_session()
assert PAM_SYSTEM_ERR == rv
def test_PamAuthenticator__close_session_unauthenticated(pam_obj):
pam_obj.handle = PamHandle()
pam_conv = PamConv()
pam_obj.pam_start(b'', b'', pam_conv, pam_obj.handle)
rv = pam_obj.close_session()
assert PAM_SESSION_ERR == rv
def test_PamAuthenticator__conversation_callback_prompt_echo_off(pam_obj):
'''Verify that the password is stuffed into the pp_response structure and the
response code is set to zero
'''
n_messages = 1
messages = PamMessage(PAM_PROMPT_ECHO_OFF, b'Password: ')
pp_messages = pointer(pointer(messages))
response = PamResponse(b'overwrite', -1)
pp_response = pointer(pointer(response))
encoding = 'utf-8'
password = b'blank'
msg_list = []
libc = cdll.LoadLibrary(None)
rv = my_conv(n_messages,
pp_messages,
pp_response,
libc,
msg_list,
password,
encoding)
assert b'blank' == pp_response.contents.contents.resp
assert 0 == pp_response.contents.contents.resp_retcode
assert PAM_SUCCESS == rv
def test_PamAuthenticator__conversation_callback_prompt_echo_on(pam_obj):
'''Verify that the stuffed PamResponse "overwrite" is copied into the output
and the resp_retcode is set to zero
'''
n_messages = 1
messages = PamMessage(PAM_PROMPT_ECHO_ON, b'Password: ')
pp_messages = pointer(pointer(messages))
response = PamResponse(b'overwrite', -1)
pp_response = pointer(pointer(response))
encoding = 'utf-8'
password = b'blank'
msg_list = []
libc = cdll.LoadLibrary(None)
rv = my_conv(n_messages,
pp_messages,
pp_response,
libc,
msg_list,
password,
encoding)
assert None is pp_response.contents.contents.resp
assert 0 == pp_response.contents.contents.resp_retcode
assert PAM_SUCCESS == rv
def test_PamAuthenticator__conversation_callback_multimessage_OFF_ON(pam_obj):
'''Verify that the stuffed PamResponse "overwrite" is copied into the output
and the resp_retcode is set to zero
'''
n_messages = 2
msg1 = PamMessage(PAM_PROMPT_ECHO_OFF, b'overwrite with PAM_PROMPT_ECHO_OFF')
msg2 = PamMessage(PAM_PROMPT_ECHO_ON, b'overwrite with PAM_PROMPT_ECHO_ON')
ptr1 = pointer(msg1)
ptr2 = pointer(msg2)
ptrs = pointer(ptr1)
ptrs[1] = ptr2
pp_messages = pointer(ptrs[0])
response = PamResponse(b'overwrite', -1)
pp_response = pointer(pointer(response))
encoding = 'utf-8'
password = b'blank'
msg_list = []
libc = cdll.LoadLibrary(None)
rv = my_conv(n_messages,
pp_messages,
pp_response,
libc,
msg_list,
password,
encoding)
assert b'blank' == pp_response.contents.contents.resp
assert 0 == pp_response.contents.contents.resp_retcode
assert PAM_SUCCESS == rv
def test_PamAuthenticator__conversation_callback_multimessage_ON_OFF(pam_obj):
'''Verify that the stuffed PamResponse "overwrite" is copied into the output
and the resp_retcode is set to zero
'''
n_messages = 2
msg1 = PamMessage(PAM_PROMPT_ECHO_ON, b'overwrite with PAM_PROMPT_ECHO_ON')
msg2 = PamMessage(PAM_PROMPT_ECHO_OFF, b'overwrite with PAM_PROMPT_ECHO_OFF')
ptr1 = pointer(msg1)
ptr2 = pointer(msg2)
ptrs = pointer(ptr1)
ptrs[1] = ptr2
pp_messages = pointer(ptrs[0])
response = PamResponse(b'overwrite', -1)
pp_response = pointer(pointer(response))
encoding = 'utf-8'
password = b'blank'
msg_list = []
libc = cdll.LoadLibrary(None)
rv = my_conv(n_messages,
pp_messages,
pp_response,
libc,
msg_list,
password,
encoding)
assert None is pp_response.contents.contents.resp
assert 0 == pp_response.contents.contents.resp_retcode
assert PAM_SUCCESS == rv
|
