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pgsql/pgAdmin 4/python/Lib/site-packages/nacl/bindings/randombytes.py
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AoAnima
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13 июл 2026, 17:47
13 июл 2026, 17:47
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# 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)[:]