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author | Toshio Kuratomi <toshio@fedoraproject.org> | 2015-06-25 08:17:58 -0700 |
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committer | Toshio Kuratomi <toshio@fedoraproject.org> | 2015-06-25 08:17:58 -0700 |
commit | 9911a947ed7b23bbd47ab776c8c356d6de3be4eb (patch) | |
tree | c34027a78d75a627d440e5ce674d1fc453fde20e | |
parent | 00aed57295f01699c6f52419b0c715191abf4762 (diff) | |
download | ansible-9911a947ed7b23bbd47ab776c8c356d6de3be4eb.tar.gz |
Vendorize match_hostname code so that ansible can push it out to clients along with the code that uses it.
-rw-r--r-- | lib/ansible/module_utils/urls.py | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/lib/ansible/module_utils/urls.py b/lib/ansible/module_utils/urls.py index 54bdd8d2d6..27b10742f7 100644 --- a/lib/ansible/module_utils/urls.py +++ b/lib/ansible/module_utils/urls.py @@ -5,6 +5,7 @@ # to the complete work. # # Copyright (c), Michael DeHaan <michael.dehaan@gmail.com>, 2012-2013 +# Copyright (c), Toshio Kuratomi <tkuratomi@ansible.com>, 2015 # All rights reserved. # # Redistribution and use in source and binary forms, with or without modification, @@ -25,6 +26,60 @@ # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE # USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +# +# The match_hostname function and supporting code is under the terms and +# conditions of the Python Software Foundation License. They were taken from +# the Python3 standard library and adapted for use in Python2. See comments in the +# source for which code precisely is under this License. PSF License text +# follows: +# +# PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2 +# -------------------------------------------- +# +# 1. This LICENSE AGREEMENT is between the Python Software Foundation +# ("PSF"), and the Individual or Organization ("Licensee") accessing and +# otherwise using this software ("Python") in source or binary form and +# its associated documentation. +# +# 2. Subject to the terms and conditions of this License Agreement, PSF hereby +# grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce, +# analyze, test, perform and/or display publicly, prepare derivative works, +# distribute, and otherwise use Python alone or in any derivative version, +# provided, however, that PSF's License Agreement and PSF's notice of copyright, +# i.e., "Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, +# 2011, 2012, 2013, 2014 Python Software Foundation; All Rights Reserved" are +# retained in Python alone or in any derivative version prepared by Licensee. +# +# 3. In the event Licensee prepares a derivative work that is based on +# or incorporates Python or any part thereof, and wants to make +# the derivative work available to others as provided herein, then +# Licensee hereby agrees to include in any such work a brief summary of +# the changes made to Python. +# +# 4. PSF is making Python available to Licensee on an "AS IS" +# basis. PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR +# IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND +# DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS +# FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON WILL NOT +# INFRINGE ANY THIRD PARTY RIGHTS. +# +# 5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON +# FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS +# A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON, +# OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF. +# +# 6. This License Agreement will automatically terminate upon a material +# breach of its terms and conditions. +# +# 7. Nothing in this License Agreement shall be deemed to create any +# relationship of agency, partnership, or joint venture between PSF and +# Licensee. This License Agreement does not grant permission to use PSF +# trademarks or trade name in a trademark sense to endorse or promote +# products or services of Licensee, or any third party. +# +# 8. By copying, installing or otherwise using Python, Licensee +# agrees to be bound by the terms and conditions of this License +# Agreement. try: import urllib2 @@ -53,6 +108,120 @@ except ImportError: except ImportError: HAS_MATCH_HOSTNAME = False +if not HAS_MATCH_HOSTNAME: + ### + ### The following block of code is under the terms and conditions of the + ### Python Software Foundation License + ### + + """The match_hostname() function from Python 3.4, essential when using SSL.""" + + import re + + class CertificateError(ValueError): + pass + + + def _dnsname_match(dn, hostname, max_wildcards=1): + """Matching according to RFC 6125, section 6.4.3 + + http://tools.ietf.org/html/rfc6125#section-6.4.3 + """ + pats = [] + if not dn: + return False + + # Ported from python3-syntax: + # leftmost, *remainder = dn.split(r'.') + parts = dn.split(r'.') + leftmost = parts[0] + remainder = parts[1:] + + wildcards = leftmost.count('*') + if wildcards > max_wildcards: + # Issue #17980: avoid denials of service by refusing more + # than one wildcard per fragment. A survey of established + # policy among SSL implementations showed it to be a + # reasonable choice. + raise CertificateError( + "too many wildcards in certificate DNS name: " + repr(dn)) + + # speed up common case w/o wildcards + if not wildcards: + return dn.lower() == hostname.lower() + + # RFC 6125, section 6.4.3, subitem 1. + # The client SHOULD NOT attempt to match a presented identifier in which + # the wildcard character comprises a label other than the left-most label. + if leftmost == '*': + # When '*' is a fragment by itself, it matches a non-empty dotless + # fragment. + pats.append('[^.]+') + elif leftmost.startswith('xn--') or hostname.startswith('xn--'): + # RFC 6125, section 6.4.3, subitem 3. + # The client SHOULD NOT attempt to match a presented identifier + # where the wildcard character is embedded within an A-label or + # U-label of an internationalized domain name. + pats.append(re.escape(leftmost)) + else: + # Otherwise, '*' matches any dotless string, e.g. www* + pats.append(re.escape(leftmost).replace(r'\*', '[^.]*')) + + # add the remaining fragments, ignore any wildcards + for frag in remainder: + pats.append(re.escape(frag)) + + pat = re.compile(r'\A' + r'\.'.join(pats) + r'\Z', re.IGNORECASE) + return pat.match(hostname) + + + def match_hostname(cert, hostname): + """Verify that *cert* (in decoded format as returned by + SSLSocket.getpeercert()) matches the *hostname*. RFC 2818 and RFC 6125 + rules are followed, but IP addresses are not accepted for *hostname*. + + CertificateError is raised on failure. On success, the function + returns nothing. + """ + if not cert: + raise ValueError("empty or no certificate") + dnsnames = [] + san = cert.get('subjectAltName', ()) + for key, value in san: + if key == 'DNS': + if _dnsname_match(value, hostname): + return + dnsnames.append(value) + if not dnsnames: + # The subject is only checked when there is no dNSName entry + # in subjectAltName + for sub in cert.get('subject', ()): + for key, value in sub: + # XXX according to RFC 2818, the most specific Common Name + # must be used. + if key == 'commonName': + if _dnsname_match(value, hostname): + return + dnsnames.append(value) + if len(dnsnames) > 1: + raise CertificateError("hostname %r " + "doesn't match either of %s" + % (hostname, ', '.join(map(repr, dnsnames)))) + elif len(dnsnames) == 1: + raise CertificateError("hostname %r " + "doesn't match %r" + % (hostname, dnsnames[0])) + else: + raise CertificateError("no appropriate commonName or " + "subjectAltName fields were found") + + ### + ### End of Python Software Foundation Licensed code + ### + + HAS_MATCH_HOSTNAME = True + + import httplib import os import re |