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# Copyright (c) 2016, 2018 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2018 Ioana Tagirta <ioana.tagirta@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
import sys
import six
import astroid
PY36 = sys.version_info >= (3, 6)
def _hashlib_transform():
signature = "value=''"
template = """
class %(name)s(object):
def __init__(self, %(signature)s): pass
def digest(self):
return %(digest)s
def copy(self):
return self
def update(self, value): pass
def hexdigest(self):
return ''
@property
def name(self):
return %(name)r
@property
def block_size(self):
return 1
@property
def digest_size(self):
return 1
"""
algorithms_with_signature = dict.fromkeys(
["md5", "sha1", "sha224", "sha256", "sha384", "sha512"], signature
)
if PY36:
blake2b_signature = "data=b'', *, digest_size=64, key=b'', salt=b'', \
person=b'', fanout=1, depth=1, leaf_size=0, node_offset=0, \
node_depth=0, inner_size=0, last_node=False"
blake2s_signature = "data=b'', *, digest_size=32, key=b'', salt=b'', \
person=b'', fanout=1, depth=1, leaf_size=0, node_offset=0, \
node_depth=0, inner_size=0, last_node=False"
new_algorithms = dict.fromkeys(
["sha3_224", "sha3_256", "sha3_384", "sha3_512", "shake_128", "shake_256"],
signature,
)
algorithms_with_signature.update(new_algorithms)
algorithms_with_signature.update(
{"blake2b": blake2b_signature, "blake2s": blake2s_signature}
)
classes = "".join(
template
% {
"name": hashfunc,
"digest": 'b""' if six.PY3 else '""',
"signature": signature,
}
for hashfunc, signature in algorithms_with_signature.items()
)
return astroid.parse(classes)
astroid.register_module_extender(astroid.MANAGER, "hashlib", _hashlib_transform)
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