Gecko [ v99win.today ]

Name	Size	Permission
__pycache__	[ DIR ]	drwxr-xr-x
__init__.py	16.6 KB	-rw-r--r--
crypto_aead.py	15.23 KB	-rw-r--r--
crypto_box.py	9.9 KB	-rw-r--r--
crypto_core.py	13.41 KB	-rw-r--r--
crypto_generichash.py	8.64 KB	-rw-r--r--
crypto_hash.py	2.12 KB	-rw-r--r--
crypto_kx.py	6.57 KB	-rw-r--r--
crypto_pwhash.py	18.41 KB	-rw-r--r--
crypto_scalarmult.py	8.05 KB	-rw-r--r--
crypto_secretbox.py	2.85 KB	-rw-r--r--
crypto_secretstream.py	10.9 KB	-rw-r--r--
crypto_shorthash.py	2.54 KB	-rw-r--r--
crypto_sign.py	10.1 KB	-rw-r--r--
randombytes.py	1.53 KB	-rw-r--r--
sodium_core.py	1.01 KB	-rw-r--r--
utils.py	4.2 KB	-rw-r--r--

Code Editor : randombytes.py

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

randombytes_SEEDBYTES: int = lib.randombytes_seedbytes()

def randombytes(size: int) -> bytes:
    """
    Returns ``size`` number of random bytes from a cryptographically secure
    random source.

:param size: int
    :rtype: bytes
    """
    buf = ffi.new("unsigned char[]", size)
    lib.randombytes(buf, size)
    return ffi.buffer(buf, size)[:]

def randombytes_buf_deterministic(size: int, seed: bytes) -> bytes:
    """
    Returns ``size`` number of deterministically generated pseudorandom bytes
    from a seed

:param size: int
    :param seed: bytes
    :rtype: bytes
    """
    if len(seed) != randombytes_SEEDBYTES:
        raise exc.TypeError(
            "Deterministic random bytes must be generated from 32 bytes"
        )

buf = ffi.new("unsigned char[]", size)
    lib.randombytes_buf_deterministic(buf, size, seed)
    return ffi.buffer(buf, size)[:]

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Code Editor : randombytes.py