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212
lib/python3.5/site-packages/Crypto/Hash/HMAC.py Normal file
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# HMAC.py - Implements the HMAC algorithm as described by RFC 2104.
#
# ===================================================================
# Portions Copyright (c) 2001, 2002, 2003 Python Software Foundation;
# All Rights Reserved
#
# This file contains code from the Python 2.2 hmac.py module (the
# "Original Code"), with modifications made after it was incorporated
# into PyCrypto (the "Modifications").
#
# To the best of our knowledge, the Python Software Foundation is the
# copyright holder of the Original Code, and has licensed it under the
# Python 2.2 license. See the file LEGAL/copy/LICENSE.python-2.2 for
# details.
#
# The Modifications to 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.
# ===================================================================
"""HMAC (Hash-based Message Authentication Code) algorithm
HMAC is a MAC defined in RFC2104_ and FIPS-198_ and constructed using
a cryptograpic hash algorithm.
It is usually named *HMAC-X*, where *X* is the hash algorithm; for
instance *HMAC-SHA1* or *HMAC-MD5*.
The strength of an HMAC depends on:
- the strength of the hash algorithm
- the length and entropy of the secret key
An example of possible usage is the following:
>>> from Crypto.Hash import HMAC
>>>
>>> secret = b'Swordfish'
>>> h = HMAC.new(secret)
>>> h.update(b'Hello')
>>> print h.hexdigest()
.. _RFC2104: http://www.ietf.org/rfc/rfc2104.txt
.. _FIPS-198: http://csrc.nist.gov/publications/fips/fips198/fips-198a.pdf
"""
# This is just a copy of the Python 2.2 HMAC module, modified to work when
# used on versions of Python before 2.2.
__revision__ = "$Id$"
__all__ = ['new', 'digest_size', 'HMAC' ]
from Crypto.Util.strxor import strxor_c
from Crypto.Util.py3compat import *
#: The size of the authentication tag produced by the MAC.
#: It matches the digest size on the underlying
#: hashing module used.
digest_size = None
class HMAC:
"""Class that implements HMAC"""
#: The size of the authentication tag produced by the MAC.
#: It matches the digest size on the underlying
#: hashing module used.
digest_size = None
def __init__(self, key, msg = None, digestmod = None):
"""Create a new HMAC object.
:Parameters:
key : byte string
secret key for the MAC object.
It must be long enough to match the expected security level of the
MAC. However, there is no benefit in using keys longer than the
`digest_size` of the underlying hash algorithm.
msg : byte string
The very first chunk of the message to authenticate.
It is equivalent to an early call to `update()`. Optional.
:Parameter digestmod:
The hash algorithm the HMAC is based on.
Default is `Crypto.Hash.MD5`.
:Type digestmod:
A hash module or object instantiated from `Crypto.Hash`
"""
if digestmod is None:
from . import MD5
digestmod = MD5
self.digestmod = digestmod
self.outer = digestmod.new()
self.inner = digestmod.new()
try:
self.digest_size = digestmod.digest_size
except AttributeError:
self.digest_size = len(self.outer.digest())
try:
# The block size is 128 bytes for SHA384 and SHA512 and 64 bytes
# for the others hash function
blocksize = digestmod.block_size
except AttributeError:
blocksize = 64
ipad = 0x36
opad = 0x5C
if len(key) > blocksize:
key = digestmod.new(key).digest()
key = key + bchr(0) * (blocksize - len(key))
self.outer.update(strxor_c(key, opad))
self.inner.update(strxor_c(key, ipad))
if (msg):
self.update(msg)
def update(self, msg):
"""Continue authentication of a message by consuming the next chunk of data.
Repeated calls are equivalent to a single call with the concatenation
of all the arguments. In other words:
>>> m.update(a); m.update(b)
is equivalent to:
>>> m.update(a+b)
:Parameters:
msg : byte string
The next chunk of the message being authenticated
"""
self.inner.update(msg)
def copy(self):
"""Return a copy ("clone") of the MAC object.
The copy will have the same internal state as the original MAC
object.
This can be used to efficiently compute the MAC of strings that
share a common initial substring.
:Returns: An `HMAC` object
"""
other = HMAC(b(""))
other.digestmod = self.digestmod
other.inner = self.inner.copy()
other.outer = self.outer.copy()
return other
def digest(self):
"""Return the **binary** (non-printable) MAC of the message that has
been authenticated so far.
This method does not change the state of the MAC object.
You can continue updating the object after calling this function.
:Return: A byte string of `digest_size` bytes. It may contain non-ASCII
characters, including null bytes.
"""
h = self.outer.copy()
h.update(self.inner.digest())
return h.digest()
def hexdigest(self):
"""Return the **printable** MAC of the message that has been
authenticated so far.
This method does not change the state of the MAC object.
:Return: A string of 2* `digest_size` bytes. It contains only
hexadecimal ASCII digits.
"""
return "".join(["%02x" % bord(x)
for x in tuple(self.digest())])
def new(key, msg = None, digestmod = None):
"""Create a new HMAC object.
:Parameters:
key : byte string
key for the MAC object.
It must be long enough to match the expected security level of the
MAC. However, there is no benefit in using keys longer than the
`digest_size` of the underlying hash algorithm.
msg : byte string
The very first chunk of the message to authenticate.
It is equivalent to an early call to `HMAC.update()`.
Optional.
:Parameter digestmod:
The hash to use to implement the HMAC. Default is `Crypto.Hash.MD5`.
:Type digestmod:
A hash module or instantiated object from `Crypto.Hash`
:Returns: An `HMAC` object
"""
return HMAC(key, msg, digestmod)

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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.
# ===================================================================
"""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

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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

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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.
# ===================================================================
"""MD5 cryptographic hash algorithm.
MD5 is specified in RFC1321_ and produces the 128 bit digest of a message.
>>> from Crypto.Hash import MD5
>>>
>>> h = MD5.new()
>>> h.update(b'Hello')
>>> print h.hexdigest()
MD5 stand for Message Digest version 5, and it was invented by Rivest in 1991.
This algorithm is insecure. Do not use it for new designs.
.. _RFC1321: http://tools.ietf.org/html/rfc1321
"""
_revision__ = "$Id$"
__all__ = ['new', 'digest_size', 'MD5Hash' ]
from Crypto.Util.py3compat import *
from Crypto.Hash.hashalgo import HashAlgo
try:
# The md5 module is deprecated in Python 2.6, so use hashlib when possible.
import hashlib
hashFactory = hashlib.md5
except ImportError:
from . import md5
hashFactory = md5
class MD5Hash(HashAlgo):
"""Class that implements an MD5 hash
:undocumented: block_size
"""
#: ASN.1 Object identifier (OID)::
#:
#: id-md5 OBJECT IDENTIFIER ::= {
#: iso(1) member-body(2) us(840) rsadsi(113549)
#: digestAlgorithm(2) 5
#: }
#:
#: This value uniquely identifies the MD5 algorithm.
oid = b('\x06\x08\x2a\x86\x48\x86\xf7\x0d\x02\x05')
digest_size = 16
block_size = 64
def __init__(self, data=None):
HashAlgo.__init__(self, hashFactory, data)
def new(self, data=None):
return MD5Hash(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 `MD5Hash.update()`.
Optional.
:Return: A `MD5Hash` object
"""
return MD5Hash().new(data)
#: The size of the resulting hash in bytes.
digest_size = MD5Hash.digest_size
#: The internal block size of the hash algorithm in bytes.
block_size = MD5Hash.block_size

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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.
# ===================================================================
"""RIPEMD-160 cryptographic hash algorithm.
RIPEMD-160_ produces the 160 bit digest of a message.
>>> from Crypto.Hash import RIPEMD
>>>
>>> h = RIPEMD.new()
>>> h.update(b'Hello')
>>> print h.hexdigest()
RIPEMD-160 stands for RACE Integrity Primitives Evaluation Message Digest
with a 160 bit digest. It was invented by Dobbertin, Bosselaers, and Preneel.
This algorithm is considered secure, although it has not been scrutinized as
extensively as SHA-1. Moreover, it provides an informal security level of just
80bits.
.. _RIPEMD-160: http://homes.esat.kuleuven.be/~bosselae/ripemd160.html
"""
_revision__ = "$Id$"
__all__ = ['new', 'digest_size', 'RIPEMD160Hash' ]
from Crypto.Util.py3compat import *
from Crypto.Hash.hashalgo import HashAlgo
import Crypto.Hash._RIPEMD160 as _RIPEMD160
hashFactory = _RIPEMD160
class RIPEMD160Hash(HashAlgo):
"""Class that implements a RIPMD-160 hash
:undocumented: block_size
"""
#: ASN.1 Object identifier (OID)::
#:
#: id-ripemd160 OBJECT IDENTIFIER ::= {
#: iso(1) identified-organization(3) teletrust(36)
#: algorithm(3) hashAlgorithm(2) ripemd160(1)
#: }
#:
#: This value uniquely identifies the RIPMD-160 algorithm.
oid = b("\x06\x05\x2b\x24\x03\x02\x01")
digest_size = 20
block_size = 64
def __init__(self, data=None):
HashAlgo.__init__(self, hashFactory, data)
def new(self, data=None):
return RIPEMD160Hash(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 `RIPEMD160Hash.update()`.
Optional.
:Return: A `RIPEMD160Hash` object
"""
return RIPEMD160Hash().new(data)
#: The size of the resulting hash in bytes.
digest_size = RIPEMD160Hash.digest_size
#: The internal block size of the hash algorithm in bytes.
block_size = RIPEMD160Hash.block_size

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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.
# ===================================================================
"""SHA-1 cryptographic hash algorithm.
SHA-1_ produces the 160 bit digest of a message.
>>> from Crypto.Hash import SHA
>>>
>>> h = SHA.new()
>>> h.update(b'Hello')
>>> print h.hexdigest()
*SHA* stands for Secure Hash Algorithm.
This algorithm is not considered secure. Do not use it for new designs.
.. _SHA-1: http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
"""
_revision__ = "$Id$"
__all__ = ['new', 'digest_size', 'SHA1Hash' ]
from Crypto.Util.py3compat import *
from Crypto.Hash.hashalgo import HashAlgo
try:
# The sha module is deprecated in Python 2.6, so use hashlib when possible.
import hashlib
hashFactory = hashlib.sha1
except ImportError:
from . import sha
hashFactory = sha
class SHA1Hash(HashAlgo):
"""Class that implements a SHA-1 hash
:undocumented: block_size
"""
#: ASN.1 Object identifier (OID)::
#:
#: id-sha1 OBJECT IDENTIFIER ::= {
#: iso(1) identified-organization(3) oiw(14) secsig(3)
#: algorithms(2) 26
#: }
#:
#: This value uniquely identifies the SHA-1 algorithm.
oid = b('\x06\x05\x2b\x0e\x03\x02\x1a')
digest_size = 20
block_size = 64
def __init__(self, data=None):
HashAlgo.__init__(self, hashFactory, data)
def new(self, data=None):
return SHA1Hash(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 `SHA1Hash.update()`.
Optional.
:Return: A `SHA1Hash` object
"""
return SHA1Hash().new(data)
#: The size of the resulting hash in bytes.
digest_size = SHA1Hash.digest_size
#: The internal block size of the hash algorithm in bytes.
block_size = SHA1Hash.block_size

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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.
# ===================================================================
"""SHA-224 cryptographic hash algorithm.
SHA-224 belongs to the SHA-2_ family of cryptographic hashes.
It produces the 224 bit digest of a message.
>>> from Crypto.Hash import SHA224
>>>
>>> h = SHA224.new()
>>> h.update(b'Hello')
>>> print h.hexdigest()
*SHA* stands for Secure Hash Algorithm.
.. _SHA-2: http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
"""
_revision__ = "$Id$"
__all__ = ['new', 'digest_size', 'SHA224Hash' ]
from Crypto.Util.py3compat import *
from Crypto.Hash.hashalgo import HashAlgo
try:
import hashlib
hashFactory = hashlib.sha224
except ImportError:
from Crypto.Hash import _SHA224
hashFactory = _SHA224
class SHA224Hash(HashAlgo):
"""Class that implements a SHA-224 hash
:undocumented: block_size
"""
#: ASN.1 Object identifier (OID)::
#:
#: id-sha224 OBJECT IDENTIFIER ::= {
#: joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3)
#: nistalgorithm(4) hashalgs(2) 4
#: }
#:
#: This value uniquely identifies the SHA-224 algorithm.
oid = b('\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x04')
digest_size = 28
block_size = 64
def __init__(self, data=None):
HashAlgo.__init__(self, hashFactory, data)
def new(self, data=None):
return SHA224Hash(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 `SHA224Hash.update()`.
Optional.
:Return: A `SHA224Hash` object
"""
return SHA224Hash().new(data)
#: The size of the resulting hash in bytes.
digest_size = SHA224Hash.digest_size
#: The internal block size of the hash algorithm in bytes.
block_size = SHA224Hash.block_size

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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.
# ===================================================================
"""SHA-256 cryptographic hash algorithm.
SHA-256 belongs to the SHA-2_ family of cryptographic hashes.
It produces the 256 bit digest of a message.
>>> from Crypto.Hash import SHA256
>>>
>>> h = SHA256.new()
>>> h.update(b'Hello')
>>> print h.hexdigest()
*SHA* stands for Secure Hash Algorithm.
.. _SHA-2: http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
"""
_revision__ = "$Id$"
__all__ = ['new', 'digest_size', 'SHA256Hash' ]
from Crypto.Util.py3compat import *
from Crypto.Hash.hashalgo import HashAlgo
try:
import hashlib
hashFactory = hashlib.sha256
except ImportError:
from Crypto.Hash import _SHA256
hashFactory = _SHA256
class SHA256Hash(HashAlgo):
"""Class that implements a SHA-256 hash
:undocumented: block_size
"""
#: ASN.1 Object identifier (OID)::
#:
#: id-sha256 OBJECT IDENTIFIER ::= {
#: joint-iso-itu-t(2) country(16) us(840) organization(1)
#: gov(101) csor(3) nistalgorithm(4) hashalgs(2) 1
#: }
#:
#: This value uniquely identifies the SHA-256 algorithm.
oid = b('\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x01')
digest_size = 32
block_size = 64
def __init__(self, data=None):
HashAlgo.__init__(self, hashFactory, data)
def new(self, data=None):
return SHA256Hash(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 `SHA256Hash.update()`.
Optional.
:Return: A `SHA256Hash` object
"""
return SHA256Hash().new(data)
#: The size of the resulting hash in bytes.
digest_size = SHA256Hash.digest_size
#: The internal block size of the hash algorithm in bytes.
block_size = SHA256Hash.block_size

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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.
# ===================================================================
"""SHA-384 cryptographic hash algorithm.
SHA-384 belongs to the SHA-2_ family of cryptographic hashes.
It produces the 384 bit digest of a message.
>>> from Crypto.Hash import SHA384
>>>
>>> h = SHA384.new()
>>> h.update(b'Hello')
>>> print h.hexdigest()
*SHA* stands for Secure Hash Algorithm.
.. _SHA-2: http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
"""
_revision__ = "$Id$"
__all__ = ['new', 'digest_size', 'SHA384Hash' ]
from Crypto.Util.py3compat import *
from Crypto.Hash.hashalgo import HashAlgo
try:
import hashlib
hashFactory = hashlib.sha384
except ImportError:
from Crypto.Hash import _SHA384
hashFactory = _SHA384
class SHA384Hash(HashAlgo):
"""Class that implements a SHA-384 hash
:undocumented: block_size
"""
#: ASN.1 Object identifier (OID)::
#:
#: id-sha384 OBJECT IDENTIFIER ::= {
#: joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3)
#: nistalgorithm(4) hashalgs(2) 2
#: }
#:
#: This value uniquely identifies the SHA-384 algorithm.
oid = b('\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x02')
digest_size = 48
block_size = 128
def __init__(self, data=None):
HashAlgo.__init__(self, hashFactory, data)
def new(self, data=None):
return SHA384Hash(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 `SHA384Hash.update()`.
Optional.
:Return: A `SHA384Hash` object
"""
return SHA384Hash().new(data)
#: The size of the resulting hash in bytes.
digest_size = SHA384Hash.digest_size
#: The internal block size of the hash algorithm in bytes.
block_size = SHA384Hash.block_size

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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.
# ===================================================================
"""SHA-512 cryptographic hash algorithm.
SHA-512 belongs to the SHA-2_ family of cryptographic hashes.
It produces the 512 bit digest of a message.
>>> from Crypto.Hash import SHA512
>>>
>>> h = SHA512.new()
>>> h.update(b'Hello')
>>> print h.hexdigest()
*SHA* stands for Secure Hash Algorithm.
.. _SHA-2: http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
"""
_revision__ = "$Id$"
__all__ = ['new', 'digest_size', 'SHA512Hash' ]
from Crypto.Util.py3compat import *
from Crypto.Hash.hashalgo import HashAlgo
try:
import hashlib
hashFactory = hashlib.sha512
except ImportError:
from Crypto.Hash import _SHA512
hashFactory = _SHA512
class SHA512Hash(HashAlgo):
"""Class that implements a SHA-512 hash
:undocumented: block_size
"""
#: ASN.1 Object identifier (OID)::
#:
#: id-sha512 OBJECT IDENTIFIER ::= {
#: joint-iso-itu-t(2)
#: country(16) us(840) organization(1) gov(101) csor(3) nistalgorithm(4) hashalgs(2) 3
#: }
#:
#: This value uniquely identifies the SHA-512 algorithm.
oid = b('\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x03')
digest_size = 64
block_size = 128
def __init__(self, data=None):
HashAlgo.__init__(self, hashFactory, data)
def new(self, data=None):
return SHA512Hash(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 `SHA512Hash.update()`.
Optional.
:Return: A `SHA512Hash` object
"""
return SHA512Hash().new(data)
#: The size of the resulting hash in bytes.
digest_size = SHA512Hash.digest_size
#: The internal block size of the hash algorithm in bytes.
block_size = SHA512Hash.block_size

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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.
# ===================================================================
"""Hashing algorithms
Hash functions take arbitrary binary strings as input, and produce a random-like output
of fixed size that is dependent on the input; it should be practically infeasible
to derive the original input data given only the hash function's
output. In other words, the hash function is *one-way*.
It should also not be practically feasible to find a second piece of data
(a *second pre-image*) whose hash is the same as the original message
(*weak collision resistance*).
Finally, it should not be feasible to find two arbitrary messages with the
same hash (*strong collision resistance*).
The output of the hash function is called the *digest* of the input message.
In general, the security of a hash function is related to the length of the
digest. If the digest is *n* bits long, its security level is roughly comparable
to the the one offered by an *n/2* bit encryption algorithm.
Hash functions can be used simply as a integrity check, or, in
association with a public-key algorithm, can be used to implement
digital signatures.
The hashing modules here all support the interface described in `PEP
247`_ , "API for Cryptographic Hash Functions".
.. _`PEP 247` : http://www.python.org/dev/peps/pep-0247/
:undocumented: _MD2, _MD4, _RIPEMD160, _SHA224, _SHA256, _SHA384, _SHA512
"""
__all__ = ['HMAC', 'MD2', 'MD4', 'MD5', 'RIPEMD', 'SHA',
'SHA224', 'SHA256', 'SHA384', 'SHA512']
__revision__ = "$Id$"

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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.
# ===================================================================
from binascii import hexlify
class HashAlgo:
"""A generic class for an abstract cryptographic hash algorithm.
:undocumented: block_size
"""
#: The size of the resulting hash in bytes.
digest_size = None
#: The internal block size of the hash algorithm in bytes.
block_size = None
def __init__(self, hashFactory, data=None):
"""Initialize the hash object.
:Parameters:
hashFactory : callable
An object that will generate the actual hash implementation.
*hashFactory* must have a *new()* method, or must be directly
callable.
data : byte string
The very first chunk of the message to hash.
It is equivalent to an early call to `update()`.
"""
if hasattr(hashFactory, 'new'):
self._hash = hashFactory.new()
else:
self._hash = hashFactory()
if data:
self.update(data)
def update(self, data):
"""Continue hashing of a message by consuming the next chunk of data.
Repeated calls are equivalent to a single call with the concatenation
of all the arguments. In other words:
>>> m.update(a); m.update(b)
is equivalent to:
>>> m.update(a+b)
:Parameters:
data : byte string
The next chunk of the message being hashed.
"""
return self._hash.update(data)
def digest(self):
"""Return the **binary** (non-printable) digest of the message that has been hashed so far.
This method does not change the state of the hash object.
You can continue updating the object after calling this function.
:Return: A byte string of `digest_size` bytes. It may contain non-ASCII
characters, including null bytes.
"""
return self._hash.digest()
def hexdigest(self):
"""Return the **printable** digest of the message that has been hashed so far.
This method does not change the state of the hash object.
:Return: A string of 2* `digest_size` characters. It contains only
hexadecimal ASCII digits.
"""
return self._hash.hexdigest()
def copy(self):
"""Return a copy ("clone") of the hash object.
The copy will have the same internal state as the original hash
object.
This can be used to efficiently compute the digests of strings that
share a common initial substring.
:Return: A hash object of the same type
"""
return self._hash.copy()
def new(self, data=None):
"""Return a fresh instance of the hash object.
Unlike the `copy` method, the internal state of the object is empty.
:Parameters:
data : byte string
The next chunk of the message being hashed.
:Return: A hash object of the same type
"""
pass