mirror of
https://github.com/thegeeklab/ansible-later.git
synced 2024-11-26 23:00:36 +00:00
136 lines
4.5 KiB
Python
136 lines
4.5 KiB
Python
# Copyright 2013 Donald Stufft and individual contributors
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
from __future__ import absolute_import
|
|
from __future__ import division
|
|
|
|
import nacl.bindings
|
|
import nacl.encoding
|
|
|
|
from . import _argon2
|
|
|
|
ALG = _argon2.ALG_ARGON2I13
|
|
STRPREFIX = nacl.bindings.crypto_pwhash_argon2i_STRPREFIX
|
|
|
|
SALTBYTES = _argon2.SALTBYTES
|
|
|
|
PASSWD_MIN = _argon2.PASSWD_MIN
|
|
PASSWD_MAX = _argon2.PASSWD_MAX
|
|
|
|
PWHASH_SIZE = _argon2.PWHASH_SIZE
|
|
|
|
BYTES_MIN = _argon2.BYTES_MIN
|
|
BYTES_MAX = _argon2.BYTES_MAX
|
|
|
|
verify = _argon2.verify
|
|
|
|
MEMLIMIT_MAX = nacl.bindings.crypto_pwhash_argon2i_MEMLIMIT_MAX
|
|
MEMLIMIT_MIN = nacl.bindings.crypto_pwhash_argon2i_MEMLIMIT_MIN
|
|
OPSLIMIT_MAX = nacl.bindings.crypto_pwhash_argon2i_OPSLIMIT_MAX
|
|
OPSLIMIT_MIN = nacl.bindings.crypto_pwhash_argon2i_OPSLIMIT_MIN
|
|
|
|
OPSLIMIT_INTERACTIVE = \
|
|
nacl.bindings.crypto_pwhash_argon2i_OPSLIMIT_INTERACTIVE
|
|
MEMLIMIT_INTERACTIVE = \
|
|
nacl.bindings.crypto_pwhash_argon2i_MEMLIMIT_INTERACTIVE
|
|
OPSLIMIT_SENSITIVE = \
|
|
nacl.bindings.crypto_pwhash_argon2i_OPSLIMIT_SENSITIVE
|
|
MEMLIMIT_SENSITIVE = \
|
|
nacl.bindings.crypto_pwhash_argon2i_MEMLIMIT_SENSITIVE
|
|
|
|
OPSLIMIT_MODERATE = \
|
|
nacl.bindings.crypto_pwhash_argon2i_OPSLIMIT_MODERATE
|
|
MEMLIMIT_MODERATE = \
|
|
nacl.bindings.crypto_pwhash_argon2i_MEMLIMIT_MODERATE
|
|
|
|
|
|
def kdf(size, password, salt,
|
|
opslimit=OPSLIMIT_SENSITIVE,
|
|
memlimit=MEMLIMIT_SENSITIVE,
|
|
encoder=nacl.encoding.RawEncoder):
|
|
"""
|
|
Derive a ``size`` bytes long key from a caller-supplied
|
|
``password`` and ``salt`` pair using the argon2i
|
|
memory-hard construct.
|
|
|
|
the enclosing module provides the constants
|
|
|
|
- :py:const:`.OPSLIMIT_INTERACTIVE`
|
|
- :py:const:`.MEMLIMIT_INTERACTIVE`
|
|
- :py:const:`.OPSLIMIT_MODERATE`
|
|
- :py:const:`.MEMLIMIT_MODERATE`
|
|
- :py:const:`.OPSLIMIT_SENSITIVE`
|
|
- :py:const:`.MEMLIMIT_SENSITIVE`
|
|
|
|
as a guidance for correct settings.
|
|
|
|
:param size: derived key size, must be between
|
|
:py:const:`.BYTES_MIN` and
|
|
:py:const:`.BYTES_MAX`
|
|
:type size: int
|
|
:param password: password used to seed the key derivation procedure;
|
|
it length must be between
|
|
:py:const:`.PASSWD_MIN` and
|
|
:py:const:`.PASSWD_MAX`
|
|
:type password: bytes
|
|
:param salt: **RANDOM** salt used in the key derivation procedure;
|
|
its length must be exactly :py:const:`.SALTBYTES`
|
|
:type salt: bytes
|
|
:param opslimit: the time component (operation count)
|
|
of the key derivation procedure's computational cost;
|
|
it must be between
|
|
:py:const:`.OPSLIMIT_MIN` and
|
|
:py:const:`.OPSLIMIT_MAX`
|
|
:type opslimit: int
|
|
:param memlimit: the memory occupation component
|
|
of the key derivation procedure's computational cost;
|
|
it must be between
|
|
:py:const:`.MEMLIMIT_MIN` and
|
|
:py:const:`.MEMLIMIT_MAX`
|
|
:type memlimit: int
|
|
:rtype: bytes
|
|
|
|
.. versionadded:: 1.2
|
|
"""
|
|
|
|
return encoder.encode(
|
|
nacl.bindings.crypto_pwhash_alg(size, password, salt,
|
|
opslimit, memlimit,
|
|
ALG)
|
|
)
|
|
|
|
|
|
def str(password,
|
|
opslimit=OPSLIMIT_INTERACTIVE,
|
|
memlimit=MEMLIMIT_INTERACTIVE):
|
|
"""
|
|
Hashes a password with a random salt, using the memory-hard
|
|
argon2i construct and returning an ascii string that has all
|
|
the needed info to check against a future password
|
|
|
|
|
|
The default settings for opslimit and memlimit are those deemed
|
|
correct for the interactive user login case.
|
|
|
|
:param bytes password:
|
|
:param int opslimit:
|
|
:param int memlimit:
|
|
:rtype: bytes
|
|
|
|
.. versionadded:: 1.2
|
|
"""
|
|
return nacl.bindings.crypto_pwhash_str_alg(password,
|
|
opslimit,
|
|
memlimit,
|
|
ALG)
|