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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
Tests for L{twisted.conch.openssh_compat}.
"""

import os

from twisted.trial.unittest import TestCase
from twisted.python.filepath import FilePath
from twisted.python.reflect import requireModule

if requireModule('cryptography') and requireModule('pyasn1'):
    from twisted.conch.openssh_compat.factory import OpenSSHFactory
else:
    OpenSSHFactory = None

from twisted.conch.ssh._kex import getDHGeneratorAndPrime
from twisted.conch.test import keydata
from twisted.test.test_process import MockOS


class OpenSSHFactoryTests(TestCase):
    """
    Tests for L{OpenSSHFactory}.
    """
    if getattr(os, "geteuid", None) is None:
        skip = "geteuid/seteuid not available"
    elif OpenSSHFactory is None:
        skip = "Cannot run without cryptography or PyASN1"


    def setUp(self):
        self.factory = OpenSSHFactory()
        self.keysDir = FilePath(self.mktemp())
        self.keysDir.makedirs()
        self.factory.dataRoot = self.keysDir.path
        self.moduliDir = FilePath(self.mktemp())
        self.moduliDir.makedirs()
        self.factory.moduliRoot = self.moduliDir.path

        self.keysDir.child("ssh_host_foo").setContent(b"foo")
        self.keysDir.child("bar_key").setContent(b"foo")
        self.keysDir.child("ssh_host_one_key").setContent(
            keydata.privateRSA_openssh)
        self.keysDir.child("ssh_host_two_key").setContent(
            keydata.privateDSA_openssh)
        self.keysDir.child("ssh_host_three_key").setContent(
            b"not a key content")

        self.keysDir.child("ssh_host_one_key.pub").setContent(
            keydata.publicRSA_openssh)

        self.moduliDir.child("moduli").setContent(b"""
#    $OpenBSD: moduli,v 1.xx 2016/07/26 12:34:56 jhacker Exp $
# Time Type Tests Tries Size Generator Modulus
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

""")

        self.mockos = MockOS()
        self.patch(os, "seteuid", self.mockos.seteuid)
        self.patch(os, "setegid", self.mockos.setegid)


    def test_getPublicKeys(self):
        """
        L{OpenSSHFactory.getPublicKeys} should return the available public keys
        in the data directory
        """
        keys = self.factory.getPublicKeys()
        self.assertEqual(len(keys), 1)
        keyTypes = keys.keys()
        self.assertEqual(list(keyTypes), [b'ssh-rsa'])


    def test_getPrivateKeys(self):
        """
        Will return the available private keys in the data directory, ignoring
        key files which failed to be loaded.
        """
        keys = self.factory.getPrivateKeys()
        self.assertEqual(len(keys), 2)
        keyTypes = keys.keys()
        self.assertEqual(set(keyTypes), set([b'ssh-rsa', b'ssh-dss']))
        self.assertEqual(self.mockos.seteuidCalls, [])
        self.assertEqual(self.mockos.setegidCalls, [])


    def test_getPrivateKeysAsRoot(self):
        """
        L{OpenSSHFactory.getPrivateKeys} should switch to root if the keys
        aren't readable by the current user.
        """
        keyFile = self.keysDir.child("ssh_host_two_key")
        # Fake permission error by changing the mode
        keyFile.chmod(0000)
        self.addCleanup(keyFile.chmod, 0o777)
        # And restore the right mode when seteuid is called
        savedSeteuid = os.seteuid
        def seteuid(euid):
            keyFile.chmod(0o777)
            return savedSeteuid(euid)
        self.patch(os, "seteuid", seteuid)
        keys = self.factory.getPrivateKeys()
        self.assertEqual(len(keys), 2)
        keyTypes = keys.keys()
        self.assertEqual(set(keyTypes), set([b'ssh-rsa', b'ssh-dss']))
        self.assertEqual(self.mockos.seteuidCalls, [0, os.geteuid()])
        self.assertEqual(self.mockos.setegidCalls, [0, os.getegid()])


    def test_getPrimes(self):
        """
        L{OpenSSHFactory.getPrimes} should return the available primes
        in the moduli directory.
        """
        primes = self.factory.getPrimes()
        self.assertEqual(primes, {
            2048: [getDHGeneratorAndPrime(b"diffie-hellman-group14-sha1")],
        })

Filemanager

Name Type Size Permission Actions
__pycache__ Folder 0755
__init__.py File 14 B 0644
keydata.py File 17.06 KB 0644
loopback.py File 757 B 0644
test_address.py File 1.59 KB 0644
test_agent.py File 12.78 KB 0644
test_cftp.py File 49.7 KB 0644
test_channel.py File 11.82 KB 0644
test_checkers.py File 30.76 KB 0644
test_ckeygen.py File 19.8 KB 0644
test_conch.py File 24.55 KB 0644
test_connection.py File 27.49 KB 0644
test_default.py File 11.31 KB 0644
test_endpoints.py File 51.96 KB 0644
test_filetransfer.py File 26.65 KB 0644
test_forwarding.py File 2.16 KB 0644
test_helper.py File 20.01 KB 0644
test_insults.py File 32.79 KB 0644
test_keys.py File 53.57 KB 0644
test_knownhosts.py File 48.26 KB 0644
test_manhole.py File 12.52 KB 0644
test_manhole_tap.py File 4.14 KB 0644
test_mixin.py File 1.03 KB 0644
test_openssh_compat.py File 4.52 KB 0644
test_recvline.py File 24.81 KB 0644
test_scripts.py File 1.84 KB 0644
test_session.py File 38.54 KB 0644
test_ssh.py File 31.62 KB 0644
test_tap.py File 4.83 KB 0644
test_telnet.py File 25.9 KB 0644
test_text.py File 3.85 KB 0644
test_transport.py File 89.71 KB 0644
test_unix.py File 2.47 KB 0644
test_userauth.py File 31.84 KB 0644
test_window.py File 2.07 KB 0644