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# Copyright 2016 Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# =*= License: GPL-3+ =*=
import hashlib
import obnamlib
_algorithm_list = [
('md5', obnamlib.REPO_FILE_MD5, hashlib.md5),
('sha224', obnamlib.REPO_FILE_SHA224, hashlib.sha224),
('sha256', obnamlib.REPO_FILE_SHA256, hashlib.sha256),
('sha384', obnamlib.REPO_FILE_SHA384, hashlib.sha384),
('sha512', obnamlib.REPO_FILE_SHA512, hashlib.sha512),
]
checksum_algorithms = [_name for _name, _, _ in _algorithm_list]
def get_checksum_algorithm(wanted):
for name, _, func in _algorithm_list:
if wanted == name:
return func()
raise UnknownChecksumAlgorithm(algorithm=wanted)
def get_checksum_algorithm_name(wanted_key):
for name, key, _ in _algorithm_list:
if key == wanted_key:
return name
raise UnknownChecksumAlgorithm(
algorithm=obnamlib.repo_key_name(wanted_key))
def get_checksum_algorithm_key(wanted_name):
for name, key, _ in _algorithm_list:
if name == wanted_name:
return key
raise UnknownChecksumAlgorithm(algorithm=wanted_name)
class UnknownChecksumAlgorithm(obnamlib.ObnamError):
msg = 'Unknown checksum algorithm {algorithm}.'
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