mirror of https://github.com/tp4a/teleport
95 lines
3.5 KiB
Python
95 lines
3.5 KiB
Python
"""
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"""
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# Created on 2015.07.16
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#
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# Author: Giovanni Cannata
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#
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# Copyright 2015 - 2020 Giovanni Cannata
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#
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# This file is part of ldap3.
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#
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# ldap3 is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published
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# by 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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# ldap3 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 Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with ldap3 in the COPYING and COPYING.LESSER files.
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# If not, see <http://www.gnu.org/licenses/>.
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from .. import HASHED_NONE, HASHED_MD5, HASHED_SALTED_MD5, HASHED_SALTED_SHA, HASHED_SALTED_SHA256, \
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HASHED_SALTED_SHA384, HASHED_SALTED_SHA512, HASHED_SHA, HASHED_SHA256, HASHED_SHA384, HASHED_SHA512
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import hashlib
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from os import urandom
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from base64 import b64encode
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from ..core.exceptions import LDAPInvalidHashAlgorithmError
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# each tuple: (the string to include between braces in the digest, the name of the algorithm to invoke with the new() function)
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algorithms_table = {
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HASHED_MD5: ('md5', 'MD5'),
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HASHED_SHA: ('sha', 'SHA1'),
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HASHED_SHA256: ('sha256', 'SHA256'),
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HASHED_SHA384: ('sha384', 'SHA384'),
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HASHED_SHA512: ('sha512', 'SHA512')
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}
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salted_table = {
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HASHED_SALTED_MD5: ('smd5', HASHED_MD5),
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HASHED_SALTED_SHA: ('ssha', HASHED_SHA),
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HASHED_SALTED_SHA256: ('ssha256', HASHED_SHA256),
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HASHED_SALTED_SHA384: ('ssha384', HASHED_SHA384),
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HASHED_SALTED_SHA512: ('ssha512', HASHED_SHA512)
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}
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def hashed(algorithm, value, salt=None, raw=False, encoding='utf-8'):
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if str is not bytes and not isinstance(value, bytes): # Python 3
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value = value.encode(encoding)
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if algorithm is None or algorithm == HASHED_NONE:
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return value
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# algorithm name can be already coded in the ldap3 constants or can be any value passed in the 'algorithm' parameter
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if algorithm in algorithms_table:
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try:
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digest = hashlib.new(algorithms_table[algorithm][1], value).digest()
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except ValueError:
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raise LDAPInvalidHashAlgorithmError('Hash algorithm ' + str(algorithm) + ' not available')
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if raw:
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return digest
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return ('{%s}' % algorithms_table[algorithm][0]) + b64encode(digest).decode('ascii')
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elif algorithm in salted_table:
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if not salt:
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salt = urandom(8)
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digest = hashed(salted_table[algorithm][1], value + salt, raw=True) + salt
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if raw:
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return digest
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return ('{%s}' % salted_table[algorithm][0]) + b64encode(digest).decode('ascii')
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else:
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# if an unknown (to the library) algorithm is requested passes the name as the string in braces and as the algorithm name
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# if salt is present uses it to salt the digest
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try:
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if not salt:
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digest = hashlib.new(algorithm, value).digest()
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else:
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digest = hashlib.new(algorithm, value + salt).digest() + salt
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except ValueError:
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raise LDAPInvalidHashAlgorithmError('Hash algorithm ' + str(algorithm) + ' not available')
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if raw:
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return digest
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return ('{%s}' % algorithm) + b64encode(digest).decode('ascii')
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