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Added ASN.1 UPER and OER encoding #5031

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Added ASN.1 UPER and OER encoding #5031

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d5594da
Added ASN.1 OER encoding
Jul 1, 2026
134df92
Added ASN.1 UPER encoding
Jul 1, 2026
f409917
minor fixes
Jul 1, 2026
76256cd
minor fixes
Jul 1, 2026
7e653d0
increase test coverage
Jul 2, 2026
d5eb126
minor fixes
Jul 2, 2026
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3 changes: 3 additions & 0 deletions .config/ci/install.ps1
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Expand Up @@ -19,3 +19,6 @@ python -m pip install --upgrade pip setuptools wheel --ignore-installed

# Make sure tox is installed and up to date
python -m pip install -U tox --ignore-installed

# Optional test dependency for ASN.1 OER interoperability tests
python -m pip install asn1tools
3 changes: 3 additions & 0 deletions .config/ci/install.sh
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Expand Up @@ -53,5 +53,8 @@ python -m pip install --upgrade pip setuptools wheel --ignore-installed
# Make sure tox is installed and up to date
python -m pip install -U tox --ignore-installed

# Optional test dependency for ASN.1 OER interoperability tests
python -m pip install asn1tools

# Dump Environment (so that we can check PATH, UT_FLAGS, etc.)
set
5 changes: 5 additions & 0 deletions .config/codespell_ignore.txt
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Expand Up @@ -53,3 +53,8 @@ wan
wanna
webp
widgits
uper
UPER
uPER
acn
ACN
2 changes: 2 additions & 0 deletions scapy/all.py
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Expand Up @@ -41,6 +41,8 @@

from scapy.asn1.asn1 import *
from scapy.asn1.ber import *
from scapy.asn1.oer import *
from scapy.asn1.uper import *
from scapy.asn1.mib import *

from scapy.pipetool import *
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8 changes: 7 additions & 1 deletion scapy/asn1/ber.py
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Expand Up @@ -257,11 +257,14 @@ def BER_tagging_dec(s, # type: bytes

def BER_tagging_enc(s, implicit_tag=None, explicit_tag=None):
# type: (bytes, Optional[int], Optional[int]) -> bytes
from scapy.config import conf
if len(s) > 0:
if implicit_tag is not None:
s = BER_id_enc(implicit_tag) + s[1:]
elif explicit_tag is not None:
s = BER_id_enc(explicit_tag) + BER_len_enc(len(s)) + s
s = BER_id_enc(explicit_tag) + BER_len_enc(
len(s), size=conf.ASN1_default_long_size,
) + s
return s

# [ BER classes ] #
Expand Down Expand Up @@ -629,10 +632,13 @@ class BERcodec_SEQUENCE(BERcodec_Object[Union[bytes, List[BERcodec_Object[Any]]]
@classmethod
def enc(cls, _ll, size_len=0):
# type: (Union[bytes, List[BERcodec_Object[Any]]], Optional[int]) -> bytes
from scapy.config import conf
if isinstance(_ll, bytes):
ll = _ll
else:
ll = b"".join(x.enc(cls.codec) for x in _ll)
if not size_len:
size_len = conf.ASN1_default_long_size
return chb(int(cls.tag)) + BER_len_enc(len(ll), size=size_len) + ll

@classmethod
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