94 lines
3 KiB
Python
94 lines
3 KiB
Python
# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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# Make coding more python3-ish
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import os
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from ansible.errors import AnsibleError
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# Note, sha1 is the only hash algorithm compatible with python2.4 and with
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# FIPS-140 mode (as of 11-2014)
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try:
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from hashlib import sha1 as sha1
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except ImportError:
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from sha import sha as sha1
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# Backwards compat only
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try:
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from hashlib import md5 as _md5
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except ImportError:
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try:
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from md5 import md5 as _md5
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except ImportError:
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# Assume we're running in FIPS mode here
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_md5 = None
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def secure_hash_s(data, hash_func=sha1):
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''' Return a secure hash hex digest of data. '''
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digest = hash_func()
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try:
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digest.update(data)
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except UnicodeEncodeError:
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digest.update(data.encode('utf-8'))
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return digest.hexdigest()
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def secure_hash(filename, hash_func=sha1):
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''' Return a secure hash hex digest of local file, None if file is not present or a directory. '''
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if not os.path.exists(filename) or os.path.isdir(filename):
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return None
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digest = hash_func()
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blocksize = 64 * 1024
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try:
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infile = open(filename, 'rb')
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block = infile.read(blocksize)
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while block:
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digest.update(block)
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block = infile.read(blocksize)
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infile.close()
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except IOError, e:
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raise AnsibleError("error while accessing the file %s, error was: %s" % (filename, e))
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return digest.hexdigest()
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# The checksum algorithm must match with the algorithm in ShellModule.checksum() method
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checksum = secure_hash
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checksum_s = secure_hash_s
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# Backwards compat functions. Some modules include md5s in their return values
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# Continue to support that for now. As of ansible-1.8, all of those modules
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# should also return "checksum" (sha1 for now)
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# Do not use md5 unless it is needed for:
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# 1) Optional backwards compatibility
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# 2) Compliance with a third party protocol
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#
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# MD5 will not work on systems which are FIPS-140-2 compliant.
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def md5s(data):
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if not _md5:
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raise ValueError('MD5 not available. Possibly running in FIPS mode')
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return secure_hash_s(data, _md5)
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def md5(filename):
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if not _md5:
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raise ValueError('MD5 not available. Possibly running in FIPS mode')
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return secure_hash(filename, _md5)
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