~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2011,2012 Canonical Ltd

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""Tests for the SSL support in the urllib HTTP transport.

"""

import os

import ssl

from bzrlib import (

    config,

    trace,

    )

from bzrlib.errors import (

    CertificateError,

    ConfigOptionValueError,

    )

from bzrlib.tests import (

    TestCase,

    TestCaseInTempDir,

    )

from bzrlib.transport.http import _urllib2_wrappers

class CaCertsConfigTests(TestCaseInTempDir):

    def get_stack(self, content):

        return config.MemoryStack(content.encode('utf-8'))

    def test_default_exists(self):

        """Check that the default we provide exists for the tested platform."""

        stack = self.get_stack("")

        self.assertPathExists(stack.get('ssl.ca_certs'))

    def test_specified(self):

        self.build_tree(['cacerts.pem'])

        path = os.path.join(self.test_dir, "cacerts.pem")

        stack = self.get_stack("ssl.ca_certs = %s\n" % path)

        self.assertEquals(path, stack.get('ssl.ca_certs'))

    def test_specified_doesnt_exist(self):

        stack = self.get_stack('')

        # Disable the default value mechanism to force the behavior we want

        self.overrideAttr(_urllib2_wrappers.opt_ssl_ca_certs, 'default',

                          os.path.join(self.test_dir, u"nonexisting.pem"))

        self.warnings = []

        def warning(*args):

            self.warnings.append(args[0] % args[1:])

        self.overrideAttr(trace, 'warning', warning)

        self.assertEquals(None, stack.get('ssl.ca_certs'))

        self.assertLength(1, self.warnings)

        self.assertContainsRe(self.warnings[0],

                              "is not valid for \"ssl.ca_certs\"")

class CertReqsConfigTests(TestCaseInTempDir):

    def test_default(self):

        stack = config.MemoryStack("")

        self.assertEquals(ssl.CERT_REQUIRED, stack.get("ssl.cert_reqs"))

    def test_from_string(self):

        stack = config.MemoryStack("ssl.cert_reqs = none\n")

        self.assertEquals(ssl.CERT_NONE, stack.get("ssl.cert_reqs"))

        stack = config.MemoryStack("ssl.cert_reqs = required\n")

        self.assertEquals(ssl.CERT_REQUIRED, stack.get("ssl.cert_reqs"))

        stack = config.MemoryStack("ssl.cert_reqs = invalid\n")

        self.assertRaises(ConfigOptionValueError, stack.get, "ssl.cert_reqs")

class MatchHostnameTests(TestCase):

    def test_no_certificate(self):

        self.assertRaises(ValueError,

                          _urllib2_wrappers.match_hostname, {}, "example.com")

    def test_wildcards_in_cert(self):

        def ok(cert, hostname):

            _urllib2_wrappers.match_hostname(cert, hostname)

        # Python Issue #17980: avoid denials of service by refusing more than

        # one wildcard per fragment.

        cert = {'subject': ((('commonName', 'a*b.com'),),)}

        ok(cert, 'axxb.com')

        cert = {'subject': ((('commonName', 'a*b.co*'),),)}

        ok(cert, 'axxb.com')

        cert = {'subject': ((('commonName', 'a*b*.com'),),)}

        try:

            _urllib2_wrappers.match_hostname(cert, 'axxbxxc.com')

        except ValueError as e:

            self.assertIn("too many wildcards", str(e))

    def test_no_valid_attributes(self):

        self.assertRaises(CertificateError, _urllib2_wrappers.match_hostname,

                          {"Problem": "Solved"}, "example.com")

    def test_common_name(self):

        cert = {'subject': ((('commonName', 'example.com'),),)}

        self.assertIs(None,

                      _urllib2_wrappers.match_hostname(cert, "example.com"))

        self.assertRaises(CertificateError, _urllib2_wrappers.match_hostname,

                          cert, "example.org")