Na}{

File Content: `SHA256.py`

# -*- 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

Name	Size	Permission
__pycache__	---	0755
HMAC.py	7309 bytes	0644
MD2.py	2734 bytes	0644
MD4.py	2716 bytes	0644
MD5.py	2863 bytes	0644
RIPEMD.py	3005 bytes	0644
SHA.py	2841 bytes	0644
SHA224.py	2851 bytes	0644
SHA256.py	2852 bytes	0644
SHA384.py	2853 bytes	0644
SHA512.py	2850 bytes	0644
_MD2.cpython-37m-x86_64-linux-gnu.so	12696 bytes	0755
_MD4.cpython-37m-x86_64-linux-gnu.so	16856 bytes	0755
_RIPEMD160.cpython-37m-x86_64-linux-gnu.so	16856 bytes	0755
_SHA224.cpython-37m-x86_64-linux-gnu.so	12728 bytes	0755
_SHA256.cpython-37m-x86_64-linux-gnu.so	12728 bytes	0755
_SHA384.cpython-37m-x86_64-linux-gnu.so	16824 bytes	0755
_SHA512.cpython-37m-x86_64-linux-gnu.so	16824 bytes	0755
__init__.py	2432 bytes	0644
hashalgo.py	3984 bytes	0644

File Content: SHA256.py

File Content: `SHA256.py`