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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
_algorithms = {
'sha224': hashlib.sha224,
'sha256': hashlib.sha256,
'sha384': hashlib.sha384,
'sha512': hashlib.sha512,
}
checksum_algorithms = _algorithms.keys()
def get_checksum_algorithm(name):
if name in _algorithms:
return _algorithms[name]()
raise UnknownChecksumAlgorithm(algorithm=name)
class UnknownChecksumAlgorithm(obnamlib.ObnamError):
msg = 'Unknown checksum algorithm {algorithm}.'
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