# -*- coding: utf-8 -*-

# 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.


import hashlib


BUFFER_SIZE = 65536


def get_all_hashes(filename):
    md5 = hashlib.md5()
    sha1 = hashlib.sha1()
    sha256 = hashlib.sha256()
    sha512 = hashlib.sha512()

    with open(filename, 'rb') as f:
        while True:
            data = f.read(BUFFER_SIZE)
            if not data:
                break
            md5.update(data)
            sha1.update(data)
            sha256.update(data)
            sha512.update(data)

    return {"sha512": sha512.hexdigest(),
            "sha256": sha256.hexdigest(),
            "sha1": sha1.hexdigest(),
            "md5": md5.hexdigest()}