]> Cypherpunks.ru repositories - pyderasn.git/blobdiff - tests/test_pyderasn.py
Stricter validation of *Time
[pyderasn.git] / tests / test_pyderasn.py
index 6ea1d40a703e66003648a23f149a4195b9d53e44..f2e73b4202a0a626f762e71b94b54f94f9548aff 100644 (file)
@@ -1,11 +1,10 @@
 # coding: utf-8
 # PyDERASN -- Python ASN.1 DER/BER codec with abstract structures
-# Copyright (C) 2017-2018 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
 # License along with this program.  If not, see
 # <http://www.gnu.org/licenses/>.
 
+from copy import copy
+from copy import deepcopy
 from datetime import datetime
+from importlib import import_module
 from string import ascii_letters
 from string import digits
 from string import printable
 from string import whitespace
+from time import time
 from unittest import TestCase
 
 from hypothesis import assume
@@ -51,6 +54,9 @@ from six import iterbytes
 from six import PY2
 from six import text_type
 from six import unichr as six_unichr
+from six.moves.cPickle import dumps as pickle_dumps
+from six.moves.cPickle import HIGHEST_PROTOCOL as pickle_proto
+from six.moves.cPickle import loads as pickle_loads
 
 from pyderasn import _pp
 from pyderasn import abs_decode_path
@@ -65,6 +71,7 @@ from pyderasn import DecodePathDefBy
 from pyderasn import Enumerated
 from pyderasn import EOC
 from pyderasn import EOC_LEN
+from pyderasn import ExceedingData
 from pyderasn import GeneralizedTime
 from pyderasn import GeneralString
 from pyderasn import GraphicString
@@ -132,6 +139,27 @@ tag_forms = sampled_from((TagFormConstructed, TagFormPrimitive))
 decode_path_strat = lists(integers(), max_size=3).map(
     lambda decode_path: tuple(str(dp) for dp in decode_path)
 )
+ctx_dummy = dictionaries(integers(), integers(), min_size=2, max_size=4).example()
+copy_funcs = (
+    copy,
+    lambda obj: pickle_loads(pickle_dumps(obj, pickle_proto)),
+)
+self_module = import_module(__name__)
+
+
+def register_class(klass):
+    klassname = klass.__name__ + str(time()).replace(".", "")
+    klass.__name__ = klassname
+    klass.__qualname__ = klassname
+    setattr(self_module, klassname, klass)
+
+
+def assert_exceeding_data(self, call, junk):
+    if len(junk) <= 0:
+        return
+    with assertRaisesRegex(self, ExceedingData, "%d trailing bytes" % len(junk)) as err:
+        call()
+    repr(err)
 
 
 class TestHex(TestCase):
@@ -448,8 +476,9 @@ class TestBoolean(CommonMixin, TestCase):
     def test_copy(self, values):
         for klass in (Boolean, BooleanInherited):
             obj = klass(*values)
-            obj_copied = obj.copy()
-            self.assert_copied_basic_fields(obj, obj_copied)
+            for copy_func in copy_funcs:
+                obj_copied = copy_func(obj)
+                self.assert_copied_basic_fields(obj, obj_copied)
 
     @given(
         booleans(),
@@ -560,11 +589,14 @@ class TestBoolean(CommonMixin, TestCase):
             repr(obj_expled)
             list(obj_expled.pps())
             pprint(obj_expled, big_blobs=True, with_decode_path=True)
-            obj_expled_encoded = obj_expled.encode()
-            obj_decoded, tail = obj_expled.decode(
-                obj_expled_encoded + tail_junk,
+            obj_expled_hex_encoded = obj_expled.hexencode()
+            ctx_copied = deepcopy(ctx_dummy)
+            obj_decoded, tail = obj_expled.hexdecode(
+                obj_expled_hex_encoded + hexenc(tail_junk),
                 offset=offset,
+                ctx=ctx_copied,
             )
+            self.assertDictEqual(ctx_copied, ctx_dummy)
             repr(obj_decoded)
             list(obj_decoded.pps())
             pprint(obj_decoded, big_blobs=True, with_decode_path=True)
@@ -573,7 +605,7 @@ class TestBoolean(CommonMixin, TestCase):
             self.assertNotEqual(obj_decoded, obj)
             self.assertEqual(bool(obj_decoded), bool(obj_expled))
             self.assertEqual(bool(obj_decoded), bool(obj))
-            self.assertSequenceEqual(obj_decoded.encode(), obj_expled_encoded)
+            self.assertSequenceEqual(obj_decoded.hexencode(), obj_expled_hex_encoded)
             self.assertSequenceEqual(obj_decoded.expl_tag, tag_expl)
             self.assertEqual(obj_decoded.expl_tlen, len(tag_expl))
             self.assertEqual(
@@ -587,6 +619,11 @@ class TestBoolean(CommonMixin, TestCase):
                 offset + obj_decoded.expl_tlen + obj_decoded.expl_llen,
             )
             self.assertEqual(obj_decoded.expl_offset, offset)
+            assert_exceeding_data(
+                self,
+                lambda: obj_expled.hexdecod(obj_expled_hex_encoded + hexenc(tail_junk)),
+                tail_junk,
+            )
 
     @given(integers(min_value=2))
     def test_invalid_len(self, l):
@@ -617,6 +654,10 @@ class TestBoolean(CommonMixin, TestCase):
         self.assertTrue(obj.ber_encoded)
         self.assertFalse(obj.lenindef)
         self.assertTrue(obj.bered)
+        obj = copy(obj)
+        self.assertTrue(obj.ber_encoded)
+        self.assertFalse(obj.lenindef)
+        self.assertTrue(obj.bered)
 
     @given(
         integers(min_value=1).map(tag_ctxc),
@@ -636,6 +677,11 @@ class TestBoolean(CommonMixin, TestCase):
         self.assertFalse(obj.lenindef)
         self.assertFalse(obj.ber_encoded)
         self.assertTrue(obj.bered)
+        obj = copy(obj)
+        self.assertTrue(obj.expl_lenindef)
+        self.assertFalse(obj.lenindef)
+        self.assertFalse(obj.ber_encoded)
+        self.assertTrue(obj.bered)
         self.assertSequenceEqual(tail, junk)
         repr(obj)
         list(obj.pps())
@@ -929,12 +975,13 @@ class TestInteger(CommonMixin, TestCase):
     def test_copy(self, values):
         for klass in (Integer, IntegerInherited):
             obj = klass(*values)
-            obj_copied = obj.copy()
-            self.assert_copied_basic_fields(obj, obj_copied)
-            self.assertEqual(obj.specs, obj_copied.specs)
-            self.assertEqual(obj._bound_min, obj_copied._bound_min)
-            self.assertEqual(obj._bound_max, obj_copied._bound_max)
-            self.assertEqual(obj._value, obj_copied._value)
+            for copy_func in copy_funcs:
+                obj_copied = copy_func(obj)
+                self.assert_copied_basic_fields(obj, obj_copied)
+                self.assertEqual(obj.specs, obj_copied.specs)
+                self.assertEqual(obj._bound_min, obj_copied._bound_min)
+                self.assertEqual(obj._bound_max, obj_copied._bound_max)
+                self.assertEqual(obj._value, obj_copied._value)
 
     @given(
         integers(),
@@ -1041,10 +1088,13 @@ class TestInteger(CommonMixin, TestCase):
             list(obj_expled.pps())
             pprint(obj_expled, big_blobs=True, with_decode_path=True)
             obj_expled_encoded = obj_expled.encode()
+            ctx_copied = deepcopy(ctx_dummy)
             obj_decoded, tail = obj_expled.decode(
                 obj_expled_encoded + tail_junk,
                 offset=offset,
+                ctx=ctx_copied,
             )
+            self.assertDictEqual(ctx_copied, ctx_dummy)
             repr(obj_decoded)
             list(obj_decoded.pps())
             pprint(obj_decoded, big_blobs=True, with_decode_path=True)
@@ -1067,6 +1117,11 @@ class TestInteger(CommonMixin, TestCase):
                 offset + obj_decoded.expl_tlen + obj_decoded.expl_llen,
             )
             self.assertEqual(obj_decoded.expl_offset, offset)
+            assert_exceeding_data(
+                self,
+                lambda: obj_expled.decod(obj_expled_encoded + tail_junk),
+                tail_junk,
+            )
 
     def test_go_vectors_valid(self):
         for data, expect in ((
@@ -1121,7 +1176,7 @@ def bit_string_values_strategy(draw, schema=None, value_required=False, do_expl=
 
     def _value(value_required):
         if not value_required and draw(booleans()):
-            return
+            return None
         generation_choice = 0
         if value_required:
             generation_choice = draw(sampled_from((1, 2, 3)))
@@ -1130,9 +1185,9 @@ def bit_string_values_strategy(draw, schema=None, value_required=False, do_expl=
                 sampled_from(("0", "1")),
                 max_size=len(schema),
             )))
-        elif generation_choice == 2 or draw(booleans()):
+        if generation_choice == 2 or draw(booleans()):
             return draw(binary(max_size=len(schema) // 8))
-        elif generation_choice == 3 or draw(booleans()):
+        if generation_choice == 3 or draw(booleans()):
             return tuple(draw(lists(sampled_from([name for name, _ in schema]))))
         return None
     value = _value(value_required)
@@ -1326,6 +1381,7 @@ class TestBitString(CommonMixin, TestCase):
 
             class BS(klass):
                 schema = _schema
+            register_class(BS)
             obj = BS(
                 value=value,
                 impl=impl,
@@ -1334,10 +1390,11 @@ class TestBitString(CommonMixin, TestCase):
                 optional=optional or False,
                 _decoded=_decoded,
             )
-            obj_copied = obj.copy()
-            self.assert_copied_basic_fields(obj, obj_copied)
-            self.assertEqual(obj.specs, obj_copied.specs)
-            self.assertEqual(obj._value, obj_copied._value)
+            for copy_func in copy_funcs:
+                obj_copied = copy_func(obj)
+                self.assert_copied_basic_fields(obj, obj_copied)
+                self.assertEqual(obj.specs, obj_copied.specs)
+                self.assertEqual(obj._value, obj_copied._value)
 
     @given(
         binary(),
@@ -1424,10 +1481,13 @@ class TestBitString(CommonMixin, TestCase):
             list(obj_expled.pps())
             pprint(obj_expled, big_blobs=True, with_decode_path=True)
             obj_expled_encoded = obj_expled.encode()
+            ctx_copied = deepcopy(ctx_dummy)
             obj_decoded, tail = obj_expled.decode(
                 obj_expled_encoded + tail_junk,
                 offset=offset,
+                ctx=ctx_copied,
             )
+            self.assertDictEqual(ctx_copied, ctx_dummy)
             repr(obj_decoded)
             list(obj_decoded.pps())
             pprint(obj_decoded, big_blobs=True, with_decode_path=True)
@@ -1454,6 +1514,11 @@ class TestBitString(CommonMixin, TestCase):
                 self.assertSetEqual(set(value), set(obj_decoded.named))
                 for name in value:
                     obj_decoded[name]
+            assert_exceeding_data(
+                self,
+                lambda: obj_expled.decod(obj_expled_encoded + tail_junk),
+                tail_junk,
+            )
 
     @given(integers(min_value=1, max_value=255))
     def test_bad_zero_value(self, pad_size):
@@ -1573,7 +1638,14 @@ class TestBitString(CommonMixin, TestCase):
             self.assertTrue(obj.ber_encoded)
             self.assertEqual(obj.lenindef, lenindef_expected)
             self.assertTrue(obj.bered)
+            obj = copy(obj)
+            self.assertTrue(obj.ber_encoded)
+            self.assertEqual(obj.lenindef, lenindef_expected)
+            self.assertTrue(obj.bered)
             self.assertEqual(len(encoded), obj.tlvlen)
+            repr(obj)
+            list(obj.pps())
+            pprint(obj, big_blobs=True, with_decode_path=True)
 
     @given(
         integers(min_value=0),
@@ -1705,6 +1777,10 @@ class TestBitString(CommonMixin, TestCase):
         self.assertTrue(obj.ber_encoded)
         self.assertTrue(obj.lenindef)
         self.assertTrue(obj.bered)
+        obj = copy(obj)
+        self.assertTrue(obj.ber_encoded)
+        self.assertTrue(obj.lenindef)
+        self.assertTrue(obj.bered)
 
 
 @composite
@@ -1898,11 +1974,12 @@ class TestOctetString(CommonMixin, TestCase):
     def test_copy(self, values):
         for klass in (OctetString, OctetStringInherited):
             obj = klass(*values)
-            obj_copied = obj.copy()
-            self.assert_copied_basic_fields(obj, obj_copied)
-            self.assertEqual(obj._bound_min, obj_copied._bound_min)
-            self.assertEqual(obj._bound_max, obj_copied._bound_max)
-            self.assertEqual(obj._value, obj_copied._value)
+            for copy_func in copy_funcs:
+                obj_copied = copy_func(obj)
+                self.assert_copied_basic_fields(obj, obj_copied)
+                self.assertEqual(obj._bound_min, obj_copied._bound_min)
+                self.assertEqual(obj._bound_max, obj_copied._bound_max)
+                self.assertEqual(obj._value, obj_copied._value)
 
     @given(
         binary(),
@@ -2002,10 +2079,13 @@ class TestOctetString(CommonMixin, TestCase):
             list(obj_expled.pps())
             pprint(obj_expled, big_blobs=True, with_decode_path=True)
             obj_expled_encoded = obj_expled.encode()
+            ctx_copied = deepcopy(ctx_dummy)
             obj_decoded, tail = obj_expled.decode(
                 obj_expled_encoded + tail_junk,
                 offset=offset,
+                ctx=ctx_copied,
             )
+            self.assertDictEqual(ctx_copied, ctx_dummy)
             repr(obj_decoded)
             list(obj_decoded.pps())
             pprint(obj_decoded, big_blobs=True, with_decode_path=True)
@@ -2028,6 +2108,11 @@ class TestOctetString(CommonMixin, TestCase):
                 offset + obj_decoded.expl_tlen + obj_decoded.expl_llen,
             )
             self.assertEqual(obj_decoded.expl_offset, offset)
+            assert_exceeding_data(
+                self,
+                lambda: obj_expled.decod(obj_expled_encoded + tail_junk),
+                tail_junk,
+            )
 
     @given(
         integers(min_value=1, max_value=30),
@@ -2089,7 +2174,14 @@ class TestOctetString(CommonMixin, TestCase):
             self.assertTrue(obj.ber_encoded)
             self.assertEqual(obj.lenindef, lenindef_expected)
             self.assertTrue(obj.bered)
+            obj = copy(obj)
+            self.assertTrue(obj.ber_encoded)
+            self.assertEqual(obj.lenindef, lenindef_expected)
+            self.assertTrue(obj.bered)
             self.assertEqual(len(encoded), obj.tlvlen)
+            repr(obj)
+            list(obj.pps())
+            pprint(obj, big_blobs=True, with_decode_path=True)
 
     @given(
         integers(min_value=0),
@@ -2225,8 +2317,9 @@ class TestNull(CommonMixin, TestCase):
                 optional=optional or False,
                 _decoded=_decoded,
             )
-            obj_copied = obj.copy()
-            self.assert_copied_basic_fields(obj, obj_copied)
+            for copy_func in copy_funcs:
+                obj_copied = copy_func(obj)
+                self.assert_copied_basic_fields(obj, obj_copied)
 
     @given(integers(min_value=1).map(tag_encode))
     def test_stripped(self, tag_impl):
@@ -2299,10 +2392,13 @@ class TestNull(CommonMixin, TestCase):
             list(obj_expled.pps())
             pprint(obj_expled, big_blobs=True, with_decode_path=True)
             obj_expled_encoded = obj_expled.encode()
+            ctx_copied = deepcopy(ctx_dummy)
             obj_decoded, tail = obj_expled.decode(
                 obj_expled_encoded + tail_junk,
                 offset=offset,
+                ctx=ctx_copied,
             )
+            self.assertDictEqual(ctx_copied, ctx_dummy)
             repr(obj_decoded)
             list(obj_decoded.pps())
             pprint(obj_decoded, big_blobs=True, with_decode_path=True)
@@ -2323,6 +2419,11 @@ class TestNull(CommonMixin, TestCase):
                 offset + obj_decoded.expl_tlen + obj_decoded.expl_llen,
             )
             self.assertEqual(obj_decoded.expl_offset, offset)
+            assert_exceeding_data(
+                self,
+                lambda: obj_expled.decod(obj_expled_encoded + tail_junk),
+                tail_junk,
+            )
 
     @given(integers(min_value=1))
     def test_invalid_len(self, l):
@@ -2393,6 +2494,7 @@ class TestObjectIdentifier(CommonMixin, TestCase):
         repr(err.exception)
         obj = ObjectIdentifier(value)
         self.assertTrue(obj.ready)
+        self.assertFalse(obj.ber_encoded)
         repr(obj)
         list(obj.pps())
         pprint(obj, big_blobs=True, with_decode_path=True)
@@ -2492,9 +2594,10 @@ class TestObjectIdentifier(CommonMixin, TestCase):
                 optional=optional,
                 _decoded=_decoded,
             )
-            obj_copied = obj.copy()
-            self.assert_copied_basic_fields(obj, obj_copied)
-            self.assertEqual(obj._value, obj_copied._value)
+            for copy_func in copy_funcs:
+                obj_copied = copy_func(obj)
+                self.assert_copied_basic_fields(obj, obj_copied)
+                self.assertEqual(obj._value, obj_copied._value)
 
     @settings(max_examples=LONG_TEST_MAX_EXAMPLES)
     @given(
@@ -2631,10 +2734,13 @@ class TestObjectIdentifier(CommonMixin, TestCase):
             list(obj_expled.pps())
             pprint(obj_expled, big_blobs=True, with_decode_path=True)
             obj_expled_encoded = obj_expled.encode()
+            ctx_copied = deepcopy(ctx_dummy)
             obj_decoded, tail = obj_expled.decode(
                 obj_expled_encoded + tail_junk,
                 offset=offset,
+                ctx=ctx_copied,
             )
+            self.assertDictEqual(ctx_copied, ctx_dummy)
             repr(obj_decoded)
             list(obj_decoded.pps())
             pprint(obj_decoded, big_blobs=True, with_decode_path=True)
@@ -2657,6 +2763,11 @@ class TestObjectIdentifier(CommonMixin, TestCase):
                 offset + obj_decoded.expl_tlen + obj_decoded.expl_llen,
             )
             self.assertEqual(obj_decoded.expl_offset, offset)
+            assert_exceeding_data(
+                self,
+                lambda: obj_expled.decod(obj_expled_encoded + tail_junk),
+                tail_junk,
+            )
 
     @given(
         oid_strategy().map(ObjectIdentifier),
@@ -2700,6 +2811,77 @@ class TestObjectIdentifier(CommonMixin, TestCase):
             ObjectIdentifier((2, 999, 3)),
         )
 
+    def test_nonnormalized_first_arc(self):
+        tampered = (
+            ObjectIdentifier.tag_default +
+            len_encode(2) +
+            b'\x80' +
+            ObjectIdentifier((1, 0)).encode()[-1:]
+        )
+        obj, _ = ObjectIdentifier().decode(tampered, ctx={"bered": True})
+        self.assertTrue(obj.ber_encoded)
+        self.assertTrue(obj.bered)
+        obj = copy(obj)
+        self.assertTrue(obj.ber_encoded)
+        self.assertTrue(obj.bered)
+        with assertRaisesRegex(self, DecodeError, "non normalized arc encoding"):
+            ObjectIdentifier().decode(tampered)
+
+    @given(data_strategy())
+    def test_negative_arcs(self, d):
+        oid = list(d.draw(oid_strategy()))
+        if len(oid) == 2:
+            return
+        idx = d.draw(integers(min_value=3, max_value=len(oid)))
+        oid[idx - 1] *= -1
+        if oid[idx - 1] == 0:
+            oid[idx - 1] = -1
+        with self.assertRaises(InvalidOID):
+            ObjectIdentifier(tuple(oid))
+        with self.assertRaises(InvalidOID):
+            ObjectIdentifier(".".join(str(i) for i in oid))
+
+    @given(data_strategy())
+    def test_plused_arcs(self, d):
+        oid = [str(arc) for arc in d.draw(oid_strategy())]
+        idx = d.draw(integers(min_value=0, max_value=len(oid)))
+        oid[idx - 1] = "+" + oid[idx - 1]
+        with self.assertRaises(InvalidOID):
+            ObjectIdentifier(".".join(str(i) for i in oid))
+
+    @given(data_strategy())
+    def test_nonnormalized_arcs(self, d):
+        arcs = d.draw(lists(
+            integers(min_value=0, max_value=100),
+            min_size=1,
+            max_size=5,
+        ))
+        dered = ObjectIdentifier((1, 0) + tuple(arcs)).encode()
+        _, _, lv = tag_strip(dered)
+        _, _, v = len_decode(lv)
+        v_no_first_arc = v[1:]
+        idx_for_tamper = d.draw(integers(
+            min_value=0,
+            max_value=len(v_no_first_arc) - 1,
+        ))
+        tampered = list(bytearray(v_no_first_arc))
+        for _ in range(d.draw(integers(min_value=1, max_value=3))):
+            tampered.insert(idx_for_tamper, 0x80)
+        tampered = bytes(bytearray(tampered))
+        tampered = (
+            ObjectIdentifier.tag_default +
+            len_encode(len(tampered)) +
+            tampered
+        )
+        obj, _ = ObjectIdentifier().decode(tampered, ctx={"bered": True})
+        self.assertTrue(obj.ber_encoded)
+        self.assertTrue(obj.bered)
+        obj = copy(obj)
+        self.assertTrue(obj.ber_encoded)
+        self.assertTrue(obj.bered)
+        with assertRaisesRegex(self, DecodeError, "non normalized arc encoding"):
+            ObjectIdentifier().decode(tampered)
+
 
 @composite
 def enumerated_values_strategy(draw, schema=None, do_expl=False):
@@ -2880,6 +3062,7 @@ class TestEnumerated(CommonMixin, TestCase):
 
         class E(Enumerated):
             schema = schema_input
+        register_class(E)
         obj = E(
             value=value,
             impl=impl,
@@ -2888,9 +3071,10 @@ class TestEnumerated(CommonMixin, TestCase):
             optional=optional,
             _decoded=_decoded,
         )
-        obj_copied = obj.copy()
-        self.assert_copied_basic_fields(obj, obj_copied)
-        self.assertEqual(obj.specs, obj_copied.specs)
+        for copy_func in copy_funcs:
+            obj_copied = copy_func(obj)
+            self.assert_copied_basic_fields(obj, obj_copied)
+            self.assertEqual(obj.specs, obj_copied.specs)
 
     @settings(max_examples=LONG_TEST_MAX_EXAMPLES)
     @given(data_strategy())
@@ -2922,10 +3106,13 @@ class TestEnumerated(CommonMixin, TestCase):
         list(obj_expled.pps())
         pprint(obj_expled, big_blobs=True, with_decode_path=True)
         obj_expled_encoded = obj_expled.encode()
+        ctx_copied = deepcopy(ctx_dummy)
         obj_decoded, tail = obj_expled.decode(
             obj_expled_encoded + tail_junk,
             offset=offset,
+            ctx=ctx_copied,
         )
+        self.assertDictEqual(ctx_copied, ctx_dummy)
         repr(obj_decoded)
         list(obj_decoded.pps())
         pprint(obj_decoded, big_blobs=True, with_decode_path=True)
@@ -2948,6 +3135,11 @@ class TestEnumerated(CommonMixin, TestCase):
             offset + obj_decoded.expl_tlen + obj_decoded.expl_llen,
         )
         self.assertEqual(obj_decoded.expl_offset, offset)
+        assert_exceeding_data(
+            self,
+            lambda: obj_expled.decod(obj_expled_encoded + tail_junk),
+            tail_junk,
+        )
 
 
 @composite
@@ -3146,11 +3338,12 @@ class StringMixin(object):
     def test_copy(self, d):
         values = d.draw(string_values_strategy(self.text_alphabet()))
         obj = self.base_klass(*values)
-        obj_copied = obj.copy()
-        self.assert_copied_basic_fields(obj, obj_copied)
-        self.assertEqual(obj._bound_min, obj_copied._bound_min)
-        self.assertEqual(obj._bound_max, obj_copied._bound_max)
-        self.assertEqual(obj._value, obj_copied._value)
+        for copy_func in copy_funcs:
+            obj_copied = copy_func(obj)
+            self.assert_copied_basic_fields(obj, obj_copied)
+            self.assertEqual(obj._bound_min, obj_copied._bound_min)
+            self.assertEqual(obj._bound_max, obj_copied._bound_max)
+            self.assertEqual(obj._value, obj_copied._value)
 
     @given(data_strategy())
     def test_stripped(self, d):
@@ -3247,10 +3440,13 @@ class StringMixin(object):
         list(obj_expled.pps())
         pprint(obj_expled, big_blobs=True, with_decode_path=True)
         obj_expled_encoded = obj_expled.encode()
+        ctx_copied = deepcopy(ctx_dummy)
         obj_decoded, tail = obj_expled.decode(
             obj_expled_encoded + tail_junk,
             offset=offset,
+            ctx=ctx_copied,
         )
+        self.assertDictEqual(ctx_copied, ctx_dummy)
         repr(obj_decoded)
         list(obj_decoded.pps())
         pprint(obj_decoded, big_blobs=True, with_decode_path=True)
@@ -3275,18 +3471,26 @@ class StringMixin(object):
             offset + obj_decoded.expl_tlen + obj_decoded.expl_llen,
         )
         self.assertEqual(obj_decoded.expl_offset, offset)
+        assert_exceeding_data(
+            self,
+            lambda: obj_expled.decod(obj_expled_encoded + tail_junk),
+            tail_junk,
+        )
 
 
 class TestUTF8String(StringMixin, CommonMixin, TestCase):
     base_klass = UTF8String
 
 
+cyrillic_letters = text(
+    alphabet="".join(six_unichr(i) for i in list(range(0x0410, 0x044f + 1))),
+    min_size=1,
+    max_size=5,
+)
+
+
 class UnicodeDecodeErrorMixin(object):
-    @given(text(
-        alphabet="".join(six_unichr(i) for i in list(range(0x0410, 0x044f + 1))),
-        min_size=1,
-        max_size=5,
-    ))
+    @given(cyrillic_letters)
     def test_unicode_decode_error(self, cyrillic_text):
         with self.assertRaises(DecodeError):
             self.base_klass(cyrillic_text)
@@ -3332,6 +3536,57 @@ class TestPrintableString(
 ):
     base_klass = PrintableString
 
+    def text_alphabet(self):
+        return ascii_letters + digits + " '()+,-./:=?"
+
+    @given(text(alphabet=sorted(set(whitespace) - set(" ")), min_size=1, max_size=5))
+    def test_non_printable(self, non_printable_text):
+        with assertRaisesRegex(self, DecodeError, "non-printable"):
+            self.base_klass(non_printable_text)
+
+    @given(
+        sets(integers(min_value=0, max_value=10), min_size=2, max_size=2),
+        integers(min_value=0),
+        decode_path_strat,
+    )
+    def test_invalid_bounds_while_decoding(self, ints, offset, decode_path):
+        value, bound_min = list(sorted(ints))
+
+        class String(self.base_klass):
+            bounds = (bound_min, bound_min)
+        with self.assertRaises(DecodeError) as err:
+            String().decode(
+                self.base_klass(b"1" * value).encode(),
+                offset=offset,
+                decode_path=decode_path,
+            )
+        repr(err.exception)
+        self.assertEqual(err.exception.offset, offset)
+        self.assertEqual(err.exception.decode_path, decode_path)
+
+    def test_allowable_invalid_chars(self):
+        for c, kwargs in (
+                ("*", {"allow_asterisk": True}),
+                ("&", {"allow_ampersand": True}),
+                ("&*", {"allow_asterisk": True, "allow_ampersand": True}),
+        ):
+            s = "hello invalid"
+            obj = self.base_klass(s)
+            for prop in kwargs.keys():
+                self.assertFalse(getattr(obj, prop))
+            s += c
+            with assertRaisesRegex(self, DecodeError, "non-printable"):
+                self.base_klass(s)
+            self.base_klass(s, **kwargs)
+            klass = self.base_klass(**kwargs)
+            obj = klass(s)
+            for prop in kwargs.keys():
+                self.assertTrue(getattr(obj, prop))
+            obj = copy(obj)
+            obj(s)
+            for prop in kwargs.keys():
+                self.assertTrue(getattr(obj, prop))
+
 
 class TestTeletexString(
         UnicodeDecodeErrorMixin,
@@ -3394,6 +3649,10 @@ class TestVisibleString(
         self.assertTrue(obj.ber_encoded)
         self.assertFalse(obj.lenindef)
         self.assertTrue(obj.bered)
+        obj = copy(obj)
+        self.assertTrue(obj.ber_encoded)
+        self.assertFalse(obj.lenindef)
+        self.assertTrue(obj.bered)
 
         obj, tail = VisibleString().decode(
             hexdec("3A8004034A6F6E040265730000"),
@@ -3404,6 +3663,10 @@ class TestVisibleString(
         self.assertTrue(obj.ber_encoded)
         self.assertTrue(obj.lenindef)
         self.assertTrue(obj.bered)
+        obj = copy(obj)
+        self.assertTrue(obj.ber_encoded)
+        self.assertTrue(obj.lenindef)
+        self.assertTrue(obj.bered)
 
 
 class TestGeneralString(
@@ -3482,7 +3745,10 @@ class TimeMixin(object):
         with self.assertRaises(ObjNotReady) as err:
             obj.encode()
         repr(err.exception)
-        value = d.draw(datetimes(min_value=self.min_datetime))
+        value = d.draw(datetimes(
+            min_value=self.min_datetime,
+            max_value=self.max_datetime,
+        ))
         obj = self.base_klass(value)
         self.assertTrue(obj.ready)
         repr(obj)
@@ -3584,9 +3850,10 @@ class TimeMixin(object):
             max_datetime=self.max_datetime,
         ))
         obj = self.base_klass(*values)
-        obj_copied = obj.copy()
-        self.assert_copied_basic_fields(obj, obj_copied)
-        self.assertEqual(obj._value, obj_copied._value)
+        for copy_func in copy_funcs:
+            obj_copied = copy_func(obj)
+            self.assert_copied_basic_fields(obj, obj_copied)
+            self.assertEqual(obj._value, obj_copied._value)
 
     @given(data_strategy())
     def test_stripped(self, d):
@@ -3636,16 +3903,20 @@ class TimeMixin(object):
         pprint(obj, big_blobs=True, with_decode_path=True)
         self.assertFalse(obj.expled)
         obj_encoded = obj.encode()
+        self.additional_symmetric_check(value, obj_encoded)
         obj_expled = obj(value, expl=tag_expl)
         self.assertTrue(obj_expled.expled)
         repr(obj_expled)
         list(obj_expled.pps())
         pprint(obj_expled, big_blobs=True, with_decode_path=True)
         obj_expled_encoded = obj_expled.encode()
+        ctx_copied = deepcopy(ctx_dummy)
         obj_decoded, tail = obj_expled.decode(
             obj_expled_encoded + tail_junk,
             offset=offset,
+            ctx=ctx_copied,
         )
+        self.assertDictEqual(ctx_copied, ctx_dummy)
         repr(obj_decoded)
         list(obj_decoded.pps())
         pprint(obj_decoded, big_blobs=True, with_decode_path=True)
@@ -3667,6 +3938,11 @@ class TimeMixin(object):
             offset + obj_decoded.expl_tlen + obj_decoded.expl_llen,
         )
         self.assertEqual(obj_decoded.expl_offset, offset)
+        assert_exceeding_data(
+            self,
+            lambda: obj_expled.decod(obj_expled_encoded + tail_junk),
+            tail_junk,
+        )
 
 
 class TestGeneralizedTime(TimeMixin, CommonMixin, TestCase):
@@ -3675,6 +3951,28 @@ class TestGeneralizedTime(TimeMixin, CommonMixin, TestCase):
     min_datetime = datetime(1900, 1, 1)
     max_datetime = datetime(9999, 12, 31)
 
+    def additional_symmetric_check(self, value, obj_encoded):
+        if value.microsecond > 0:
+            self.assertFalse(obj_encoded.endswith(b"0Z"))
+
+    def test_x690_vector_valid(self):
+        for data in ((
+                b"19920521000000Z",
+                b"19920622123421Z",
+                b"19920722132100.3Z",
+        )):
+            GeneralizedTime(data)
+
+    def test_x690_vector_invalid(self):
+        for data in ((
+                b"19920520240000Z",
+                b"19920622123421.0Z",
+                b"19920722132100.30Z",
+        )):
+            with self.assertRaises(DecodeError) as err:
+                GeneralizedTime(data)
+            repr(err.exception)
+
     def test_go_vectors_invalid(self):
         for data in ((
                 b"20100102030405",
@@ -3751,6 +4049,40 @@ class TestGeneralizedTime(TimeMixin, CommonMixin, TestCase):
                 junk
             )
 
+    def test_ns_fractions(self):
+        GeneralizedTime(b"20010101000000.000001Z")
+        with assertRaisesRegex(self, DecodeError, "only microsecond fractions"):
+            GeneralizedTime(b"20010101000000.0000001Z")
+
+    def test_non_pure_integers(self):
+        for data in ((
+                # b"20000102030405Z,
+                b"+2000102030405Z",
+                b"2000+102030405Z",
+                b"200001+2030405Z",
+                b"20000102+30405Z",
+                b"2000010203+405Z",
+                b"200001020304+5Z",
+                b"20000102030405.+6Z",
+                b"20000102030405.-6Z",
+                b" 2000102030405Z",
+                b"2000 102030405Z",
+                b"200001 2030405Z",
+                b"20000102 30405Z",
+                b"2000010203 405Z",
+                b"200001020304 5Z",
+                b"20000102030405. 6Z",
+                b"200 0102030405Z",
+                b"20001 02030405Z",
+                b"2000012 030405Z",
+                b"200001023 0405Z",
+                b"20000102034 05Z",
+                b"2000010203045 Z",
+                b"20000102030405.6 Z",
+        )):
+            with self.assertRaises(DecodeError):
+                GeneralizedTime(data)
+
 
 class TestUTCTime(TimeMixin, CommonMixin, TestCase):
     base_klass = UTCTime
@@ -3758,6 +4090,26 @@ class TestUTCTime(TimeMixin, CommonMixin, TestCase):
     min_datetime = datetime(2000, 1, 1)
     max_datetime = datetime(2049, 12, 31)
 
+    def additional_symmetric_check(self, value, obj_encoded):
+        pass
+
+    def test_x690_vector_valid(self):
+        for data in ((
+                b"920521000000Z",
+                b"920622123421Z",
+                b"920722132100Z",
+        )):
+            UTCTime(data)
+
+    def test_x690_vector_invalid(self):
+        for data in ((
+                b"920520240000Z",
+                b"9207221321Z",
+        )):
+            with self.assertRaises(DecodeError) as err:
+                UTCTime(data)
+            repr(err.exception)
+
     def test_go_vectors_invalid(self):
         for data in ((
                 b"a10506234540Z",
@@ -3801,6 +4153,31 @@ class TestUTCTime(TimeMixin, CommonMixin, TestCase):
             datetime(1991, 5, 6, 23, 45, 40, 0),
         )
 
+    def test_non_pure_integers(self):
+        for data in ((
+                # b"000102030405Z",
+                b"+10102030405Z",
+                b"00+102030405Z",
+                b"0001+2030405Z",
+                b"000102+30405Z",
+                b"00010203+405Z",
+                b"0001020304+5Z",
+                b" 10102030405Z",
+                b"00 102030405Z",
+                b"0001 2030405Z",
+                b"000102 30405Z",
+                b"00010203 405Z",
+                b"0001020304 5Z",
+                b"1 0102030405Z",
+                b"001 02030405Z",
+                b"00012 030405Z",
+                b"0001023 0405Z",
+                b"000102034 05Z",
+                b"00010203045 Z",
+        )):
+            with self.assertRaises(DecodeError):
+                UTCTime(data)
+
     @given(integers(min_value=0, max_value=49))
     def test_pre50(self, year):
         self.assertEqual(
@@ -3955,9 +4332,10 @@ class TestAny(CommonMixin, TestCase):
     def test_copy(self, values):
         for klass in (Any, AnyInherited):
             obj = klass(*values)
-            obj_copied = obj.copy()
-            self.assert_copied_basic_fields(obj, obj_copied)
-            self.assertEqual(obj._value, obj_copied._value)
+            for copy_func in copy_funcs:
+                obj_copied = copy_func(obj)
+                self.assert_copied_basic_fields(obj, obj_copied)
+                self.assertEqual(obj._value, obj_copied._value)
 
     @given(binary().map(OctetString))
     def test_stripped(self, value):
@@ -4029,10 +4407,13 @@ class TestAny(CommonMixin, TestCase):
             list(obj_expled.pps())
             pprint(obj_expled, big_blobs=True, with_decode_path=True)
             obj_expled_encoded = obj_expled.encode()
+            ctx_copied = deepcopy(ctx_dummy)
             obj_decoded, tail = obj_expled.decode(
                 obj_expled_encoded + tail_junk,
                 offset=offset,
+                ctx=ctx_copied,
             )
+            self.assertDictEqual(ctx_copied, ctx_dummy)
             repr(obj_decoded)
             list(obj_decoded.pps())
             pprint(obj_decoded, big_blobs=True, with_decode_path=True)
@@ -4057,6 +4438,11 @@ class TestAny(CommonMixin, TestCase):
             self.assertEqual(obj_decoded.tlen, 0)
             self.assertEqual(obj_decoded.llen, 0)
             self.assertEqual(obj_decoded.vlen, len(value))
+            assert_exceeding_data(
+                self,
+                lambda: obj_expled.decod(obj_expled_encoded + tail_junk),
+                tail_junk,
+            )
 
     @given(
         integers(min_value=1).map(tag_ctxc),
@@ -4091,6 +4477,10 @@ class TestAny(CommonMixin, TestCase):
         self.assertTrue(obj.lenindef)
         self.assertFalse(obj.ber_encoded)
         self.assertTrue(obj.bered)
+        obj = copy(obj)
+        self.assertTrue(obj.lenindef)
+        self.assertFalse(obj.ber_encoded)
+        self.assertTrue(obj.bered)
         repr(obj)
         list(obj.pps())
         pprint(obj, big_blobs=True, with_decode_path=True)
@@ -4319,6 +4709,7 @@ class TestChoice(CommonMixin, TestCase):
 
         class Wahl(self.base_klass):
             schema = _schema
+        register_class(Wahl)
         obj = Wahl(
             value=value,
             expl=expl,
@@ -4326,15 +4717,17 @@ class TestChoice(CommonMixin, TestCase):
             optional=optional or False,
             _decoded=_decoded,
         )
-        obj_copied = obj.copy()
-        self.assertIsNone(obj.tag)
-        self.assertIsNone(obj_copied.tag)
-        # hack for assert_copied_basic_fields
-        obj.tag = "whatever"
-        obj_copied.tag = "whatever"
-        self.assert_copied_basic_fields(obj, obj_copied)
-        self.assertEqual(obj._value, obj_copied._value)
-        self.assertEqual(obj.specs, obj_copied.specs)
+        for copy_func in copy_funcs:
+            obj_copied = copy_func(obj)
+            self.assertIsNone(obj.tag)
+            self.assertIsNone(obj_copied.tag)
+            # hack for assert_copied_basic_fields
+            obj.tag = "whatever"
+            obj_copied.tag = "whatever"
+            self.assert_copied_basic_fields(obj, obj_copied)
+            obj.tag = None
+            self.assertEqual(obj._value, obj_copied._value)
+            self.assertEqual(obj.specs, obj_copied.specs)
 
     @given(booleans())
     def test_stripped(self, value):
@@ -4380,10 +4773,13 @@ class TestChoice(CommonMixin, TestCase):
         list(obj_expled.pps())
         pprint(obj_expled, big_blobs=True, with_decode_path=True)
         obj_expled_encoded = obj_expled.encode()
+        ctx_copied = deepcopy(ctx_dummy)
         obj_decoded, tail = obj_expled.decode(
             obj_expled_encoded + tail_junk,
             offset=offset,
+            ctx=ctx_copied,
         )
+        self.assertDictEqual(ctx_copied, ctx_dummy)
         repr(obj_decoded)
         list(obj_decoded.pps())
         pprint(obj_decoded, big_blobs=True, with_decode_path=True)
@@ -4414,6 +4810,11 @@ class TestChoice(CommonMixin, TestCase):
             ],
             obj_encoded,
         )
+        assert_exceeding_data(
+            self,
+            lambda: obj_expled.decod(obj_expled_encoded + tail_junk),
+            tail_junk,
+        )
 
     @given(integers())
     def test_set_get(self, value):
@@ -4473,15 +4874,13 @@ def seq_values_strategy(draw, seq_klass, do_expl=False):
     value = None
     if draw(booleans()):
         value = seq_klass()
-        value._value = {
-            k: v for k, v in draw(dictionaries(
-                integers(),
-                one_of(
-                    booleans().map(Boolean),
-                    integers().map(Integer),
-                ),
-            )).items()
-        }
+        value._value = draw(dictionaries(
+            integers(),
+            one_of(
+                booleans().map(Boolean),
+                integers().map(Integer),
+            ),
+        ))
     schema = None
     if draw(booleans()):
         schema = list(draw(dictionaries(
@@ -4500,15 +4899,13 @@ def seq_values_strategy(draw, seq_klass, do_expl=False):
     default = None
     if draw(booleans()):
         default = seq_klass()
-        default._value = {
-            k: v for k, v in draw(dictionaries(
-                integers(),
-                one_of(
-                    booleans().map(Boolean),
-                    integers().map(Integer),
-                ),
-            )).items()
-        }
+        default._value = draw(dictionaries(
+            integers(),
+            one_of(
+                booleans().map(Boolean),
+                integers().map(Integer),
+            ),
+        ))
     optional = draw(one_of(none(), booleans()))
     _decoded = (
         draw(integers(min_value=0)),
@@ -4766,13 +5163,15 @@ class SeqMixing(object):
     def test_copy(self, d):
         class SeqInherited(self.base_klass):
             pass
+        register_class(SeqInherited)
         for klass in (self.base_klass, SeqInherited):
             values = d.draw(seq_values_strategy(seq_klass=klass))
             obj = klass(*values)
-            obj_copied = obj.copy()
-            self.assert_copied_basic_fields(obj, obj_copied)
-            self.assertEqual(obj.specs, obj_copied.specs)
-            self.assertEqual(obj._value, obj_copied._value)
+            for copy_func in copy_funcs:
+                obj_copied = copy_func(obj)
+                self.assert_copied_basic_fields(obj, obj_copied)
+                self.assertEqual(obj.specs, obj_copied.specs)
+                self.assertEqual(obj._value, obj_copied._value)
 
     @given(data_strategy())
     def test_stripped(self, d):
@@ -4891,10 +5290,19 @@ class SeqMixing(object):
         t, _, lv = tag_strip(seq_encoded)
         _, _, v = len_decode(lv)
         seq_encoded_lenindef = t + LENINDEF + v + EOC
+        with self.assertRaises(DecodeError):
+            seq.decode(seq_encoded_lenindef)
+        ctx_copied = deepcopy(ctx_dummy)
+        ctx_copied["bered"] = True
         seq_decoded_lenindef, tail_lenindef = seq.decode(
             seq_encoded_lenindef + tail_junk,
-            ctx={"bered": True},
+            ctx=ctx_copied,
         )
+        del ctx_copied["bered"]
+        self.assertDictEqual(ctx_copied, ctx_dummy)
+        self.assertTrue(seq_decoded_lenindef.lenindef)
+        self.assertTrue(seq_decoded_lenindef.bered)
+        seq_decoded_lenindef = copy(seq_decoded_lenindef)
         self.assertTrue(seq_decoded_lenindef.lenindef)
         self.assertTrue(seq_decoded_lenindef.bered)
         with self.assertRaises(DecodeError):
@@ -4929,6 +5337,12 @@ class SeqMixing(object):
                     obj.encode(),
                 )
 
+        assert_exceeding_data(
+            self,
+            lambda: seq.decod(seq_encoded_lenindef + tail_junk, ctx={"bered": True}),
+            tail_junk,
+        )
+
     @settings(max_examples=LONG_TEST_MAX_EXAMPLES)
     @given(data_strategy())
     def test_symmetric_with_seq(self, d):
@@ -5014,6 +5428,9 @@ class SeqMixing(object):
             seq_decoded, _ = seq_with_default.decode(seq_encoded, ctx=ctx)
             self.assertTrue(seq_decoded.ber_encoded)
             self.assertTrue(seq_decoded.bered)
+            seq_decoded = copy(seq_decoded)
+            self.assertTrue(seq_decoded.ber_encoded)
+            self.assertTrue(seq_decoded.bered)
             for name, value in _schema:
                 self.assertEqual(seq_decoded[name], seq_with_default[name])
                 self.assertEqual(seq_decoded[name], value)
@@ -5042,8 +5459,7 @@ class SeqMixing(object):
         with self.assertRaises(TagMismatch):
             seq_missing.decode(seq_encoded)
 
-    @given(data_strategy())
-    def test_bered(self, d):
+    def test_bered(self):
         class Seq(self.base_klass):
             schema = (("underlying", Boolean()),)
         encoded = Boolean.tag_default + len_encode(1) + b"\x01"
@@ -5052,6 +5468,10 @@ class SeqMixing(object):
         self.assertFalse(decoded.ber_encoded)
         self.assertFalse(decoded.lenindef)
         self.assertTrue(decoded.bered)
+        decoded = copy(decoded)
+        self.assertFalse(decoded.ber_encoded)
+        self.assertFalse(decoded.lenindef)
+        self.assertTrue(decoded.bered)
 
         class Seq(self.base_klass):
             schema = (("underlying", OctetString()),)
@@ -5068,6 +5488,10 @@ class SeqMixing(object):
         self.assertFalse(decoded.ber_encoded)
         self.assertFalse(decoded.lenindef)
         self.assertTrue(decoded.bered)
+        decoded = copy(decoded)
+        self.assertFalse(decoded.ber_encoded)
+        self.assertFalse(decoded.lenindef)
+        self.assertTrue(decoded.bered)
 
 
 class TestSequence(SeqMixing, CommonMixin, TestCase):
@@ -5164,9 +5588,12 @@ class TestSet(SeqMixing, CommonMixin, TestCase):
             seq_decoded, _ = Seq().decode(seq_encoded, ctx=ctx)
             self.assertTrue(seq_decoded.ber_encoded)
             self.assertTrue(seq_decoded.bered)
+            seq_decoded = copy(seq_decoded)
+            self.assertTrue(seq_decoded.ber_encoded)
+            self.assertTrue(seq_decoded.bered)
             self.assertSequenceEqual(
                 [bytes(seq_decoded[str(i)]) for i, t in enumerate(tags)],
-                [t for t in tags],
+                tags,
             )
 
 
@@ -5439,6 +5866,7 @@ class SeqOfMixing(object):
 
         class SeqOf(self.base_klass):
             schema = _schema
+        register_class(SeqOf)
         obj = SeqOf(
             value=value,
             bounds=bounds,
@@ -5448,11 +5876,12 @@ class SeqOfMixing(object):
             optional=optional or False,
             _decoded=_decoded,
         )
-        obj_copied = obj.copy()
-        self.assert_copied_basic_fields(obj, obj_copied)
-        self.assertEqual(obj._bound_min, obj_copied._bound_min)
-        self.assertEqual(obj._bound_max, obj_copied._bound_max)
-        self.assertEqual(obj._value, obj_copied._value)
+        for copy_func in copy_funcs:
+            obj_copied = copy_func(obj)
+            self.assert_copied_basic_fields(obj, obj_copied)
+            self.assertEqual(obj._bound_min, obj_copied._bound_min)
+            self.assertEqual(obj._bound_max, obj_copied._bound_max)
+            self.assertEqual(obj._value, obj_copied._value)
 
     @given(
         lists(binary()),
@@ -5544,10 +5973,13 @@ class SeqOfMixing(object):
         list(obj_expled.pps())
         pprint(obj_expled, big_blobs=True, with_decode_path=True)
         obj_expled_encoded = obj_expled.encode()
+        ctx_copied = deepcopy(ctx_dummy)
         obj_decoded, tail = obj_expled.decode(
             obj_expled_encoded + tail_junk,
             offset=offset,
+            ctx=ctx_copied,
         )
+        self.assertDictEqual(ctx_copied, ctx_dummy)
         repr(obj_decoded)
         list(obj_decoded.pps())
         pprint(obj_decoded, big_blobs=True, with_decode_path=True)
@@ -5580,23 +6012,34 @@ class SeqOfMixing(object):
         t, _, lv = tag_strip(obj_encoded)
         _, _, v = len_decode(lv)
         obj_encoded_lenindef = t + LENINDEF + v + EOC
+        with self.assertRaises(DecodeError):
+            obj.decode(obj_encoded_lenindef)
         obj_decoded_lenindef, tail_lenindef = obj.decode(
             obj_encoded_lenindef + tail_junk,
             ctx={"bered": True},
         )
         self.assertTrue(obj_decoded_lenindef.lenindef)
         self.assertTrue(obj_decoded_lenindef.bered)
+        obj_decoded_lenindef = copy(obj_decoded_lenindef)
+        self.assertTrue(obj_decoded_lenindef.lenindef)
+        self.assertTrue(obj_decoded_lenindef.bered)
         repr(obj_decoded_lenindef)
         list(obj_decoded_lenindef.pps())
         pprint(obj_decoded_lenindef, big_blobs=True, with_decode_path=True)
+        self.assertEqual(tail_lenindef, tail_junk)
         self.assertEqual(obj_decoded_lenindef.tlvlen, len(obj_encoded_lenindef))
         with self.assertRaises(DecodeError):
             obj.decode(obj_encoded_lenindef[:-1], ctx={"bered": True})
         with self.assertRaises(DecodeError):
             obj.decode(obj_encoded_lenindef[:-2], ctx={"bered": True})
 
-    @given(data_strategy())
-    def test_bered(self, d):
+        assert_exceeding_data(
+            self,
+            lambda: obj_expled.decod(obj_expled_encoded + tail_junk),
+            tail_junk,
+        )
+
+    def test_bered(self):
         class SeqOf(self.base_klass):
             schema = Boolean()
         encoded = Boolean(False).encode()
@@ -5608,6 +6051,10 @@ class SeqOfMixing(object):
         self.assertFalse(decoded.ber_encoded)
         self.assertFalse(decoded.lenindef)
         self.assertTrue(decoded.bered)
+        decoded = copy(decoded)
+        self.assertFalse(decoded.ber_encoded)
+        self.assertFalse(decoded.lenindef)
+        self.assertTrue(decoded.bered)
 
         class SeqOf(self.base_klass):
             schema = OctetString()
@@ -5625,6 +6072,10 @@ class SeqOfMixing(object):
         self.assertFalse(decoded.ber_encoded)
         self.assertFalse(decoded.lenindef)
         self.assertTrue(decoded.bered)
+        decoded = copy(decoded)
+        self.assertFalse(decoded.ber_encoded)
+        self.assertFalse(decoded.lenindef)
+        self.assertTrue(decoded.bered)
 
 
 class TestSequenceOf(SeqOfMixing, CommonMixin, TestCase):
@@ -5690,6 +6141,9 @@ class TestSetOf(SeqOfMixing, CommonMixin, TestCase):
             seq_decoded, _ = Seq().decode(seq_encoded, ctx=ctx)
             self.assertTrue(seq_decoded.ber_encoded)
             self.assertTrue(seq_decoded.bered)
+            seq_decoded = copy(seq_decoded)
+            self.assertTrue(seq_decoded.ber_encoded)
+            self.assertTrue(seq_decoded.bered)
             self.assertSequenceEqual(
                 [obj.encode() for obj in seq_decoded],
                 values,
@@ -5837,8 +6291,11 @@ class TestGoMarshalVectors(TestCase):
         seq = Seq()
         seq["erste"] = PrintableString("test")
         self.assertSequenceEqual(seq.encode(), hexdec("3006130474657374"))
+        # Asterisk is actually not allowable
+        PrintableString._allowable_chars |= set(b"*")
         seq["erste"] = PrintableString("test*")
         self.assertSequenceEqual(seq.encode(), hexdec("30071305746573742a"))
+        PrintableString._allowable_chars -= set(b"*")
 
         class Seq(Sequence):
             schema = (
@@ -5890,7 +6347,10 @@ class TestPP(TestCase):
         chosen_id = oids[chosen]
         pp = _pp(asn1_type_name=ObjectIdentifier.asn1_type_name, value=chosen)
         self.assertNotIn(chosen_id, pp_console_row(pp))
-        self.assertIn(chosen_id, pp_console_row(pp, oids=oids))
+        self.assertIn(
+            chosen_id,
+            pp_console_row(pp, oid_maps=[{'whatever': 'whenever'}, oids]),
+        )
 
 
 class TestAutoAddSlots(TestCase):
@@ -5918,32 +6378,33 @@ class TestOIDDefines(TestCase):
             min_size=len(value_names),
             max_size=len(value_names),
         ))
-        _schema = [
-            ("type", ObjectIdentifier(defines=(((value_name_chosen,), {
-                oid: Integer() for oid in oids[:-1]
-            }),))),
-        ]
-        for i, value_name in enumerate(value_names):
-            _schema.append((value_name, Any(expl=tag_ctxp(i))))
+        for definable_class in (Any, OctetString, BitString):
+            _schema = [
+                ("type", ObjectIdentifier(defines=(((value_name_chosen,), {
+                    oid: Integer() for oid in oids[:-1]
+                }),))),
+            ]
+            for i, value_name in enumerate(value_names):
+                _schema.append((value_name, definable_class(expl=tag_ctxp(i))))
 
-        class Seq(Sequence):
-            schema = _schema
-        seq = Seq()
-        for value_name, value in zip(value_names, values):
-            seq[value_name] = Any(Integer(value).encode())
-        seq["type"] = oid_chosen
-        seq, _ = Seq().decode(seq.encode())
-        for value_name in value_names:
-            if value_name == value_name_chosen:
-                continue
-            self.assertIsNone(seq[value_name].defined)
-        if value_name_chosen in oids[:-1]:
-            self.assertIsNotNone(seq[value_name_chosen].defined)
-            self.assertEqual(seq[value_name_chosen].defined[0], oid_chosen)
-            self.assertIsInstance(seq[value_name_chosen].defined[1], Integer)
-        repr(seq)
-        list(seq.pps())
-        pprint(seq, big_blobs=True, with_decode_path=True)
+            class Seq(Sequence):
+                schema = _schema
+            seq = Seq()
+            for value_name, value in zip(value_names, values):
+                seq[value_name] = definable_class(Integer(value).encode())
+            seq["type"] = oid_chosen
+            seq, _ = Seq().decode(seq.encode())
+            for value_name in value_names:
+                if value_name == value_name_chosen:
+                    continue
+                self.assertIsNone(seq[value_name].defined)
+            if value_name_chosen in oids[:-1]:
+                self.assertIsNotNone(seq[value_name_chosen].defined)
+                self.assertEqual(seq[value_name_chosen].defined[0], oid_chosen)
+                self.assertIsInstance(seq[value_name_chosen].defined[1], Integer)
+            repr(seq)
+            list(seq.pps())
+            pprint(seq, big_blobs=True, with_decode_path=True)
 
 
 class TestDefinesByPath(TestCase):
@@ -5994,10 +6455,10 @@ class TestDefinesByPath(TestCase):
             (type_integered, Integer(234)),
         )
         for t, v in pairs_input:
-            pair = Pair()
-            pair["type"] = t
-            pair["value"] = PairValue((Any(v),))
-            pairs.append(pair)
+            pairs.append(Pair((
+                ("type", t),
+                ("value", PairValue((Any(v),))),
+            )))
         seq_inner = SeqInner()
         seq_inner["typeInner"] = type_innered
         seq_inner["valueInner"] = Any(pairs)
@@ -6010,7 +6471,12 @@ class TestDefinesByPath(TestCase):
         pprint(seq_sequenced, big_blobs=True, with_decode_path=True)
 
         defines_by_path = []
-        seq_integered, _ = Seq().decode(seq_integered_raw)
+        ctx_copied = deepcopy(ctx_dummy)
+        seq_integered, _ = Seq().decode(
+            seq_integered_raw,
+            ctx=ctx_copied,
+        )
+        self.assertDictEqual(ctx_copied, ctx_dummy)
         self.assertIsNone(seq_integered["value"].defined)
         defines_by_path.append(
             (("type",), ((("value",), {
@@ -6018,10 +6484,13 @@ class TestDefinesByPath(TestCase):
                 type_sequenced: SeqInner(),
             }),))
         )
+        ctx_copied["defines_by_path"] = defines_by_path
         seq_integered, _ = Seq().decode(
             seq_integered_raw,
-            ctx={"defines_by_path": defines_by_path},
+            ctx=ctx_copied,
         )
+        del ctx_copied["defines_by_path"]
+        self.assertDictEqual(ctx_copied, ctx_dummy)
         self.assertIsNotNone(seq_integered["value"].defined)
         self.assertEqual(seq_integered["value"].defined[0], type_integered)
         self.assertEqual(seq_integered["value"].defined[1], Integer(123))
@@ -6032,10 +6501,13 @@ class TestDefinesByPath(TestCase):
         list(seq_integered.pps())
         pprint(seq_integered, big_blobs=True, with_decode_path=True)
 
+        ctx_copied["defines_by_path"] = defines_by_path
         seq_sequenced, _ = Seq().decode(
             seq_sequenced_raw,
-            ctx={"defines_by_path": defines_by_path},
+            ctx=ctx_copied,
         )
+        del ctx_copied["defines_by_path"]
+        self.assertDictEqual(ctx_copied, ctx_dummy)
         self.assertIsNotNone(seq_sequenced["value"].defined)
         self.assertEqual(seq_sequenced["value"].defined[0], type_sequenced)
         seq_inner = seq_sequenced["value"].defined[1]
@@ -6048,10 +6520,13 @@ class TestDefinesByPath(TestCase):
             ("value", DecodePathDefBy(type_sequenced), "typeInner"),
             ((("valueInner",), {type_innered: Pairs()}),),
         ))
+        ctx_copied["defines_by_path"] = defines_by_path
         seq_sequenced, _ = Seq().decode(
             seq_sequenced_raw,
-            ctx={"defines_by_path": defines_by_path},
+            ctx=ctx_copied,
         )
+        del ctx_copied["defines_by_path"]
+        self.assertDictEqual(ctx_copied, ctx_dummy)
         self.assertIsNotNone(seq_sequenced["value"].defined)
         self.assertEqual(seq_sequenced["value"].defined[0], type_sequenced)
         seq_inner = seq_sequenced["value"].defined[1]
@@ -6078,10 +6553,13 @@ class TestDefinesByPath(TestCase):
                 type_octet_stringed: OctetString(),
             }),),
         ))
+        ctx_copied["defines_by_path"] = defines_by_path
         seq_sequenced, _ = Seq().decode(
             seq_sequenced_raw,
-            ctx={"defines_by_path": defines_by_path},
+            ctx=ctx_copied,
         )
+        del ctx_copied["defines_by_path"]
+        self.assertDictEqual(ctx_copied, ctx_dummy)
         self.assertIsNotNone(seq_sequenced["value"].defined)
         self.assertEqual(seq_sequenced["value"].defined[0], type_sequenced)
         seq_inner = seq_sequenced["value"].defined[1]
@@ -6118,6 +6596,43 @@ class TestDefinesByPath(TestCase):
         decoded, _ = Outer().decode(outer.encode())
         self.assertEqual(decoded["tgt"].defined[1], Integer(tgt))
 
+    def test_remaining_data(self):
+        oid = ObjectIdentifier("1.2.3")
+        class Seq(Sequence):
+            schema = (
+                ("oid", ObjectIdentifier(defines=((("tgt",), {
+                    oid: Integer(),
+                }),))),
+                ("tgt", OctetString()),
+            )
+
+        seq = Seq((
+            ("oid", oid),
+            ("tgt", OctetString(Integer(123).encode() + b"junk")),
+        ))
+        with assertRaisesRegex(self, DecodeError, "remaining data"):
+            Seq().decode(seq.encode())
+
+    def test_remaining_data_seqof(self):
+        oid = ObjectIdentifier("1.2.3")
+        class SeqOf(SetOf):
+            schema = OctetString()
+
+        class Seq(Sequence):
+            schema = (
+                ("oid", ObjectIdentifier(defines=((("tgt",), {
+                    oid: Integer(),
+                }),))),
+                ("tgt", SeqOf()),
+            )
+
+        seq = Seq((
+            ("oid", oid),
+            ("tgt", SeqOf([OctetString(Integer(123).encode() + b"junk")])),
+        ))
+        with assertRaisesRegex(self, DecodeError, "remaining data"):
+            Seq().decode(seq.encode())
+
 
 class TestAbsDecodePath(TestCase):
     @given(
@@ -6125,10 +6640,9 @@ class TestAbsDecodePath(TestCase):
         lists(text(alphabet=ascii_letters, min_size=1), min_size=1).map(tuple),
     )
     def test_concat(self, decode_path, rel_path):
-        self.assertSequenceEqual(
-            abs_decode_path(decode_path, rel_path),
-            decode_path + rel_path,
-        )
+        dp = abs_decode_path(decode_path, rel_path)
+        self.assertSequenceEqual(dp, decode_path + rel_path)
+        repr(dp)
 
     @given(
         lists(text(alphabet=ascii_letters, min_size=1)).map(tuple),
@@ -6175,9 +6689,15 @@ class TestStrictDefaultExistence(TestCase):
             decoded, _ = seq.decode(raw, ctx={"allow_default_values": True})
             self.assertTrue(decoded.ber_encoded)
             self.assertTrue(decoded.bered)
+            decoded = copy(decoded)
+            self.assertTrue(decoded.ber_encoded)
+            self.assertTrue(decoded.bered)
             decoded, _ = seq.decode(raw, ctx={"bered": True})
             self.assertTrue(decoded.ber_encoded)
             self.assertTrue(decoded.bered)
+            decoded = copy(decoded)
+            self.assertTrue(decoded.ber_encoded)
+            self.assertTrue(decoded.bered)
 
 
 class TestX690PrefixedType(TestCase):
@@ -6227,3 +6747,15 @@ class TestExplOOB(TestCase):
         with assertRaisesRegex(self, DecodeError, "explicit tag out-of-bound"):
             Integer(expl=expl).decode(raw)
         Integer(expl=expl).decode(raw, ctx={"allow_expl_oob": True})
+
+
+class TestPickleDifferentVersion(TestCase):
+    def runTest(self):
+        pickled = pickle_dumps(Integer(123), pickle_proto)
+        import pyderasn
+        version_orig = pyderasn.__version__
+        pyderasn.__version__ += "different"
+        with assertRaisesRegex(self, ValueError, "different PyDERASN version"):
+            pickle_loads(pickled)
+        pyderasn.__version__ = version_orig
+        pickle_loads(pickled)