golden hour

/usr/lib/python3/dist-packages/nacl/bindings

File/Folder	Size	Actions
__init__.py	14.59 KB
__pycache__	-
crypto_aead.py	16.93 KB
crypto_box.py	9.48 KB
crypto_generichash.py	7.82 KB
crypto_hash.py	2.19 KB
crypto_kx.py	6.77 KB
crypto_pwhash.py	16.5 KB
crypto_scalarmult.py	1.76 KB
crypto_secretbox.py	2.8 KB
crypto_secretstream.py	10.23 KB
crypto_shorthash.py	2.14 KB
crypto_sign.py	9.42 KB
randombytes.py	988 B
sodium_core.py	1.05 KB
utils.py	4.32 KB

Edit: crypto_shorthash.py

# Copyright 2016 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, division, print_function

import nacl.exceptions as exc
from nacl._sodium import ffi, lib
from nacl.exceptions import ensure

BYTES = lib.crypto_shorthash_siphash24_bytes()
KEYBYTES = lib.crypto_shorthash_siphash24_keybytes()
XBYTES = lib.crypto_shorthash_siphashx24_bytes()
XKEYBYTES = lib.crypto_shorthash_siphashx24_keybytes()

def crypto_shorthash_siphash24(data, key):
    """Compute a fast, cryptographic quality, keyed hash of the input data

:param data:
    :type data: bytes
    :param key: len(key) must be equal to
                :py:data:`.KEYBYTES` (16)
    :type key: bytes
    """
    if len(key) != KEYBYTES:
        raise exc.ValueError(
            "Key length must be exactly {0} bytes".format(KEYBYTES))
    digest = ffi.new("unsigned char[]", BYTES)
    rc = lib.crypto_shorthash_siphash24(digest, data, len(data), key)

ensure(rc == 0, raising=exc.RuntimeError)
    return ffi.buffer(digest, BYTES)[:]

def crypto_shorthash_siphashx24(data, key):
    """Compute a fast, cryptographic quality, keyed hash of the input data

:param data:
    :type data: bytes
    :param key: len(key) must be equal to
                :py:data:`.XKEYBYTES` (16)
    :type key: bytes
    """
    if len(key) != XKEYBYTES:
        raise exc.ValueError(
            "Key length must be exactly {0} bytes".format(XKEYBYTES))
    digest = ffi.new("unsigned char[]", XBYTES)
    rc = lib.crypto_shorthash_siphashx24(digest, data, len(data), key)

ensure(rc == 0, raising=exc.RuntimeError)
    return ffi.buffer(digest, XBYTES)[:]