92 lines
2.7 KiB
Python
92 lines
2.7 KiB
Python
|
# -*- coding: utf-8 -*-
|
||
|
|
#
|
||
|
|
# ===================================================================
|
||
|
|
# The contents of this file are dedicated to the public domain. To
|
||
|
|
# the extent that dedication to the public domain is not available,
|
||
|
|
# everyone is granted a worldwide, perpetual, royalty-free,
|
||
|
|
# non-exclusive license to exercise all rights associated with the
|
||
|
|
# contents of this file for any purpose whatsoever.
|
||
|
|
# No rights are reserved.
|
||
|
|
#
|
||
|
|
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||
|
|
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||
|
|
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
||
|
|
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
||
|
|
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
||
|
|
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
||
|
|
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||
|
|
# SOFTWARE.
|
||
|
|
# ===================================================================
|
||
|
|
|
||
|
|
"""MD2 cryptographic hash algorithm.
|
||
|
|
|
||
|
|
MD2 is specified in RFC1319_ and it produces the 128 bit digest of a message.
|
||
|
|
|
||
|
|
>>> from Crypto.Hash import MD2
|
||
|
|
>>>
|
||
|
|
>>> h = MD2.new()
|
||
|
|
>>> h.update(b'Hello')
|
||
|
|
>>> print h.hexdigest()
|
||
|
|
|
||
|
|
MD2 stand for Message Digest version 2, and it was invented by Rivest in 1989.
|
||
|
|
|
||
|
|
This algorithm is both slow and insecure. Do not use it for new designs.
|
||
|
|
|
||
|
|
.. _RFC1319: http://tools.ietf.org/html/rfc1319
|
||
|
|
"""
|
||
|
|
|
||
|
|
_revision__ = "$Id$"
|
||
|
|
|
||
|
|
__all__ = ['new', 'digest_size', 'MD2Hash' ]
|
||
|
|
|
||
|
|
from Crypto.Util.py3compat import *
|
||
|
|
from Crypto.Hash.hashalgo import HashAlgo
|
||
|
|
|
||
|
|
import Crypto.Hash._MD2 as _MD2
|
||
|
|
hashFactory = _MD2
|
||
|
|
|
||
|
|
class MD2Hash(HashAlgo):
|
||
|
|
"""Class that implements an MD2 hash
|
||
|
|
|
||
|
|
:undocumented: block_size
|
||
|
|
"""
|
||
|
|
|
||
|
|
#: ASN.1 Object identifier (OID)::
|
||
|
|
#:
|
||
|
|
#: id-md2 OBJECT IDENTIFIER ::= {
|
||
|
|
#: iso(1) member-body(2) us(840) rsadsi(113549)
|
||
|
|
#: digestAlgorithm(2) 2
|
||
|
|
#: }
|
||
|
|
#:
|
||
|
|
#: This value uniquely identifies the MD2 algorithm.
|
||
|
|
oid = b('\x06\x08\x2a\x86\x48\x86\xf7\x0d\x02\x02')
|
||
|
|
|
||
|
|
digest_size = 16
|
||
|
|
block_size = 16
|
||
|
|
|
||
|
|
def __init__(self, data=None):
|
||
|
|
HashAlgo.__init__(self, hashFactory, data)
|
||
|
|
|
||
|
|
def new(self, data=None):
|
||
|
|
return MD2Hash(data)
|
||
|
|
|
||
|
|
def new(data=None):
|
||
|
|
"""Return a fresh instance of the hash object.
|
||
|
|
|
||
|
|
:Parameters:
|
||
|
|
data : byte string
|
||
|
|
The very first chunk of the message to hash.
|
||
|
|
It is equivalent to an early call to `MD2Hash.update()`.
|
||
|
|
Optional.
|
||
|
|
|
||
|
|
:Return: An `MD2Hash` object
|
||
|
|
"""
|
||
|
|
return MD2Hash().new(data)
|
||
|
|
|
||
|
|
#: The size of the resulting hash in bytes.
|
||
|
|
digest_size = MD2Hash.digest_size
|
||
|
|
|
||
|
|
#: The internal block size of the hash algorithm in bytes.
|
||
|
|
block_size = MD2Hash.block_size
|
||
|
|
|