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# -*- 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.
# ===================================================================
"""MD4 cryptographic hash algorithm.
MD4 is specified in RFC1320_ and produces the 128 bit digest of a message.
>>> from Crypto.Hash import MD4
>>>
>>> h = MD4.new()
>>> h.update(b'Hello')
>>> print h.hexdigest()
MD4 stand for Message Digest version 4, and it was invented by Rivest in 1990.
This algorithm is insecure. Do not use it for new designs.
.. _RFC1320: http://tools.ietf.org/html/rfc1320
"""
_revision__ = "$Id$"
__all__ = ['new', 'digest_size', 'MD4Hash' ]
from Crypto.Util.py3compat import *
from Crypto.Hash.hashalgo import HashAlgo
import Crypto.Hash._MD4 as _MD4
hashFactory = _MD4
class MD4Hash(HashAlgo):
"""Class that implements an MD4 hash
:undocumented: block_size
"""
#: ASN.1 Object identifier (OID)::
#:
#: id-md2 OBJECT IDENTIFIER ::= {
#: iso(1) member-body(2) us(840) rsadsi(113549)
#: digestAlgorithm(2) 4
#: }
#:
#: This value uniquely identifies the MD4 algorithm.
oid = b('\x06\x08\x2a\x86\x48\x86\xf7\x0d\x02\x04')
digest_size = 16
block_size = 64
def __init__(self, data=None):
HashAlgo.__init__(self, hashFactory, data)
def new(self, data=None):
return MD4Hash(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 `MD4Hash.update()`.
Optional.
:Return: A `MD4Hash` object
"""
return MD4Hash().new(data)
#: The size of the resulting hash in bytes.
digest_size = MD4Hash.digest_size
#: The internal block size of the hash algorithm in bytes.
block_size = MD4Hash.block_size