#!/usr/bin/env python
# coding: utf-8
# PyDERASN -- Python ASN.1 DER/BER codec with abstract structures
-# Copyright (C) 2017-2019 Sergey Matveev <stargrave@stargrave.org>
+# Copyright (C) 2017-2020 Sergey Matveev <stargrave@stargrave.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
-# published by the Free Software Foundation, either version 3 of the
-# License, or (at your option) any later version.
+# published by the Free Software Foundation, version 3 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
-# License along with this program. If not, see
-# <http://www.gnu.org/licenses/>.
+# License along with this program. If not, see <http://www.gnu.org/licenses/>.
"""Python ASN.1 DER/BER codec with abstract structures
This library allows you to marshal various structures in ASN.1 DER
ability to specify mapping between some OID and field that must be
decoded with specific specification.
+.. _defines:
+
defines kwarg
_____________
where ``decode_path`` is a tuple holding so-called decode path to the
exact :py:class:`pyderasn.ObjectIdentifier` field you want to apply
-``defines``, holding exactly the same value as accepted in its keyword
-argument.
+``defines``, holding exactly the same value as accepted in its
+:ref:`keyword argument <defines>`.
For example, again for CMS, you want to automatically decode
``SignedData`` and CMC's (:rfc:`5272`) ``PKIData`` and ``PKIResponse``
structures it may hold. Also, automatically decode ``controlSequence``
of ``PKIResponse``::
- content_info, tail = ContentInfo().decode(data, defines_by_path=(
+ content_info, tail = ContentInfo().decode(data, ctx={"defines_by_path": (
(
("contentType",),
((("content",), {id_signedData: SignedData()}),),
id_cmc_transactionId: TransactionId(),
})),
),
- ))
+ )})
Pay attention for :py:class:`pyderasn.DecodePathDefBy` and ``any``.
First function is useful for path construction when some automatic
try:
from termcolor import colored
except ImportError: # pragma: no cover
- def colored(what, *args):
+ def colored(what, *args, **kwargs):
return what
+__version__ = "5.5"
__all__ = (
"Any",
########################################################################
class AutoAddSlots(type):
- def __new__(mcs, name, bases, _dict):
+ def __new__(cls, name, bases, _dict):
_dict["__slots__"] = _dict.get("__slots__", ())
- return type.__new__(mcs, name, bases, _dict)
+ return type.__new__(cls, name, bases, _dict)
@add_metaclass(AutoAddSlots)
tag_only=tag_only,
)
if tag_only:
- return
+ return None
obj, tail = result
else:
try:
tag_only=tag_only,
)
if tag_only: # pragma: no cover
- return
+ return None
obj, tail = result
eoc_expected, tail = tail[:EOC_LEN], tail[EOC_LEN:]
if eoc_expected.tobytes() != EOC:
tag_only=tag_only,
)
if tag_only: # pragma: no cover
- return
+ return None
obj, tail = result
if obj.tlvlen < l and not ctx.get("allow_expl_oob", False):
raise DecodeError(
offset=offset,
)
if tag_only:
- return
+ return None
try:
l, _, v = len_decode(lv)
except DecodeError as err:
for name, value in iteritems(self.specs):
if value == self._value:
return name
+ return None
def __call__(
self,
offset=offset,
)
if tag_only:
- return
+ return None
try:
l, llen, v = len_decode(lv)
except DecodeError as err:
)
if t == self.tag:
if tag_only: # pragma: no cover
- return
+ return None
return self._decode_chunk(lv, offset, decode_path, ctx)
if t == self.tag_constructed:
if not ctx.get("bered", False):
offset=offset,
)
if tag_only: # pragma: no cover
- return
+ return None
lenindef = False
try:
l, llen, v = len_decode(lv)
)
if t == self.tag:
if tag_only:
- return
+ return None
return self._decode_chunk(lv, offset, decode_path, ctx)
if t == self.tag_constructed:
if not ctx.get("bered", False):
offset=offset,
)
if tag_only:
- return
+ return None
lenindef = False
try:
l, llen, v = len_decode(lv)
offset=offset,
)
if tag_only: # pragma: no cover
- return
+ return None
try:
l, _, v = len_decode(lv)
except DecodeError as err:
offset=offset,
)
if tag_only: # pragma: no cover
- return
+ return None
try:
l, llen, v = len_decode(lv)
except DecodeError as err:
offset=offset,
)
if tag_only: # pragma: no cover
- return
+ return None
value, tail = spec.decode(
tlv,
offset=offset,
offset=offset,
)
if tag_only: # pragma: no cover
- return
+ return None
lenindef = False
ctx_bered = ctx.get("bered", False)
try:
ctx=ctx,
_ctx_immutable=False,
)
- except TagMismatch:
- if spec.optional:
+ except TagMismatch as err:
+ if (len(err.decode_path) == len(decode_path) + 1) and spec.optional:
continue
raise
offset=offset,
)
if tag_only:
- return
+ return None
lenindef = False
ctx_bered = ctx.get("bered", False)
try:
offset=offset,
)
if tag_only:
- return
+ return None
lenindef = False
ctx_bered = ctx.get("bered", False)
try:
args.DERFile.seek(args.skip)
der = memoryview(args.DERFile.read())
args.DERFile.close()
- oid_maps = [obj_by_path(_path) for _path in (args.oids or "").split(",")]
+ oid_maps = (
+ [obj_by_path(_path) for _path in (args.oids or "").split(",")]
+ if args.oids else ()
+ )
if args.schema:
schema = obj_by_path(args.schema)
from functools import partial