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# Copyright (c) 2018 Intel Corp Inc. All rights reserved.
#
# 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
import os
def _hash_value_for_file(f, hash_function, block_size=2**20):
while True:
data = f.read(block_size)
if not data:
break
hash_function.update(data)
return hash_function.hexdigest()
def cal_file_hash(root, path, algo):
with open(os.path.join(root, path), 'rb') as fp:
h = hashlib.new(algo)
return _hash_value_for_file(fp, h)
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