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"""
<Program Name>
exceptions.py
<Author>
Santiago Torres-Arias <santiago@nyu.edu>
Lukas Puehringer <lukas.puehringer@nyu.edu>
<Started>
Dec 8, 2017
<Copyright>
See LICENSE for licensing information.
<Purpose>
Define Exceptions used in the gpg package. Following the practice from
securesystemslib the names chosen for exception classes should end in
'Error' (except where there is a good reason not to).
"""
import datetime
class PacketParsingError(Exception):
pass
class KeyNotFoundError(Exception):
pass
class PacketVersionNotSupportedError(Exception):
pass
class SignatureAlgorithmNotSupportedError(Exception):
pass
class KeyExpirationError(Exception):
def __init__(self, key):
super().__init__()
self.key = key
def __str__(self):
creation_time = datetime.datetime.utcfromtimestamp(self.key["creation_time"])
expiration_time = datetime.datetime.utcfromtimestamp(
self.key["creation_time"] + self.key["validity_period"]
)
validity_period = expiration_time - creation_time
return (
"GPG key '{}' created on '{:%Y-%m-%d %H:%M} UTC' with validity "
"period '{}' expired on '{:%Y-%m-%d %H:%M} UTC'.".format(
self.key["keyid"],
creation_time,
validity_period,
expiration_time,
)
)
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