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crypto_hash.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 __future__ import absolute_import, division, print_function from nacl import exceptions as exc from nacl._sodium import ffi, lib from nacl.exceptions import ensure # crypto_hash_BYTES = lib.crypto_hash_bytes() crypto_hash_BYTES = lib.crypto_hash_sha512_bytes() crypto_hash_sha256_BYTES = lib.crypto_hash_sha256_bytes() crypto_hash_sha512_BYTES = lib.crypto_hash_sha512_bytes() def crypto_hash(message): """ Hashes and returns the message ``message``. :param message: bytes :rtype: bytes """ digest = ffi.new("unsigned char[]", crypto_hash_BYTES) rc = lib.crypto_hash(digest, message, len(message)) ensure(rc == 0, 'Unexpected library error', raising=exc.RuntimeError) return ffi.buffer(digest, crypto_hash_BYTES)[:] def crypto_hash_sha256(message): """ Hashes and returns the message ``message``. :param message: bytes :rtype: bytes """ digest = ffi.new("unsigned char[]", crypto_hash_sha256_BYTES) rc = lib.crypto_hash_sha256(digest, message, len(message)) ensure(rc == 0, 'Unexpected library error', raising=exc.RuntimeError) return ffi.buffer(digest, crypto_hash_sha256_BYTES)[:] def crypto_hash_sha512(message): """ Hashes and returns the message ``message``. :param message: bytes :rtype: bytes """ digest = ffi.new("unsigned char[]", crypto_hash_sha512_BYTES) rc = lib.crypto_hash_sha512(digest, message, len(message)) ensure(rc == 0, 'Unexpected library error', raising=exc.RuntimeError) return ffi.buffer(digest, crypto_hash_sha512_BYTES)[:]