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# Copyright (C) 2011 Apple Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 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.
"""htdigestparser - a parser for htdigest files"""
import hashlib
import string
class HTDigestParser(object):
def __init__(self, digest_file):
self._entries = self.parse_file(digest_file)
def authenticate(self, username, realm, password):
hashed_password = hashlib.md5(':'.join((username, realm, password))).hexdigest()
return [username, realm, hashed_password] in self.entries()
def entries(self):
return self._entries
def parse_file(self, digest_file):
entries = [line.rstrip().split(':') for line in digest_file]
# Perform some sanity-checking to ensure the file is valid.
valid_characters = set(string.hexdigits)
for entry in entries:
if len(entry) != 3:
return []
hashed_password = entry[-1]
if len(hashed_password) != 32:
return []
if not set(hashed_password).issubset(valid_characters):
return []
return entries
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