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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.
# ===================================================================
__revision__ = "$Id$"
__all__ = ['new', 'digest_size']
from Crypto.Util.wrapper import Wrapper
from Crypto.Util.py3compat import *
# The OID for SHA-256 is:
#
# id-sha256 OBJECT IDENTIFIER ::= {
# joint-iso-itu-t(2) country(16) us(840) organization(1)
# gov(101) csor(3) nistalgorithm(4) hashalgs(2) 1
# }
#
oid = b('\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x01')
def new(data=b("")):
obj = Wrapper(hashFactory, data)
obj.oid = oid
obj.new = globals()['new']
if not hasattr(obj, 'digest_size'):
obj.digest_size = digest_size
return obj
try:
import hashlib
hashFactory = hashlib.sha256
except ImportError:
from Crypto.Hash import _SHA256
hashFactory = _SHA256
digest_size = 32
block_size = 64
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