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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Tests for L{twisted.conch.scripts.ckeygen}.
"""
import sys
from StringIO import StringIO
try:
import Crypto
import pyasn1
except ImportError:
skip = "PyCrypto and pyasn1 required for twisted.conch.scripts.ckeygen."
else:
from twisted.conch.ssh.keys import Key
from twisted.conch.scripts.ckeygen import printFingerprint, _saveKey
from twisted.python.filepath import FilePath
from twisted.trial.unittest import TestCase
from twisted.conch.test.keydata import publicRSA_openssh, privateRSA_openssh
class KeyGenTests(TestCase):
"""
Tests for various functions used to implement the I{ckeygen} script.
"""
def setUp(self):
"""
Patch C{sys.stdout} with a L{StringIO} instance to tests can make
assertions about what's printed.
"""
self.stdout = StringIO()
self.patch(sys, 'stdout', self.stdout)
def test_printFingerprint(self):
"""
L{printFingerprint} writes a line to standard out giving the number of
bits of the key, its fingerprint, and the basename of the file from it
was read.
"""
filename = self.mktemp()
FilePath(filename).setContent(publicRSA_openssh)
printFingerprint({'filename': filename})
self.assertEqual(
self.stdout.getvalue(),
'768 3d:13:5f:cb:c9:79:8a:93:06:27:65:bc:3d:0b:8f:af temp\n')
def test_saveKey(self):
"""
L{_saveKey} writes the private and public parts of a key to two
different files and writes a report of this to standard out.
"""
base = FilePath(self.mktemp())
base.makedirs()
filename = base.child('id_rsa').path
key = Key.fromString(privateRSA_openssh)
_saveKey(
key.keyObject,
{'filename': filename, 'pass': 'passphrase'})
self.assertEqual(
self.stdout.getvalue(),
"Your identification has been saved in %s\n"
"Your public key has been saved in %s.pub\n"
"The key fingerprint is:\n"
"3d:13:5f:cb:c9:79:8a:93:06:27:65:bc:3d:0b:8f:af\n" % (
filename,
filename))
self.assertEqual(
key.fromString(
base.child('id_rsa').getContent(), None, 'passphrase'),
key)
self.assertEqual(
Key.fromString(base.child('id_rsa.pub').getContent()),
key.public())
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