Comments (4)
laf0rge
commented on July 22, 2024
I can modufy the ASN.1 source to replace the DEFAULT { 00000000000'H, '000000000000'H, ... } clause with a simple DEFAULT 00000000000'H. Then asn1tools is able to parse the ASN.1 snyatx, and also parse actual (DER encoded) data in-line with the syntax.
However, (obviously) when the related field is not set and one expects the default value to be used during encode, there is an exception:
File "/usr/local/lib/python3.11/dist-packages/asn1tools/compiler.py", line 137, in encode
type_.check_types(data)
File "/usr/local/lib/python3.11/dist-packages/asn1tools/codecs/compiler.py", line 102, in check_types
return self.type_checker.encode(data)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/asn1tools/codecs/type_checker.py", line 311, in encode
raise e
File "/usr/local/lib/python3.11/dist-packages/asn1tools/codecs/type_checker.py", line 307, in encode
self._type.encode(data)
File "/usr/local/lib/python3.11/dist-packages/asn1tools/codecs/type_checker.py", line 247, in encode
raise e
File "/usr/local/lib/python3.11/dist-packages/asn1tools/codecs/type_checker.py", line 243, in encode
member.encode(data[1])
File "/usr/local/lib/python3.11/dist-packages/asn1tools/codecs/type_checker.py", line 142, in encode
self.encode_members(data)
File "/usr/local/lib/python3.11/dist-packages/asn1tools/codecs/type_checker.py", line 154, in encode_members
raise e
File "/usr/local/lib/python3.11/dist-packages/asn1tools/codecs/type_checker.py", line 150, in encode_members
member.encode(data[name])
File "/usr/local/lib/python3.11/dist-packages/asn1tools/codecs/type_checker.py", line 166, in encode
super(List, self).encode(data)
File "/usr/local/lib/python3.11/dist-packages/asn1tools/codecs/type_checker.py", line 45, in encode
raise EncodeError(
asn1tools.codecs.EncodeError: ProfileElement.akaParameter.sqnInit: Expected data of type list, but got 0x000000000000.
Obviously the encoder is correct: It doesn't make sense to have a single value as a default for a "SEQUENCE OF", where one would need a list of values. So it looks a bit like the problem is just the parser which doesn't parse that construct?
The full ASN.1 syntax of the spec I'm working with can be found at https://gitea.osmocom.org/laforge/simalliance-tca-interoperable-format-asn1/src/branch/master/asn1/PEDefinitions.asn
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eerimoq
commented on July 22, 2024
Sorry, but I'm not very active in maintaining this project anymore :(
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laf0rge
commented on July 22, 2024
Sorry, but I'm not very active in maintaining this project anymore :(
I noticed, and that's all fine. It still is in my opinion the most powerful/complete python framework for ASN.1. I tried to look at debugging the specific problem further, but given I know very little about parser theory and have no idea about pyparsing, so I sadly didn't get very far :( If I should solve it, I'd for sure send a related PR.
Seeing that there are sponsoring opportunities avaialable: Would you consider debugging this in a paid/freelance capacity?
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eerimoq
commented on July 22, 2024
I've other projects to work on that are far more interesting to me, so no.
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Related Issues (20)
- Unsupported type 'BIT STRING' error in generate C source uper HOT 3
- python asn1tools BitString uper encoded wrong value HOT 1
- Objects set members are not parsed at all HOT 2
- ASN1Tools Fails to Compile 3GPP Release 16 ASN.1 HOT 3
- Expected enumeration index 0, 1 or 2, but got 3
- Generated C OER decoder fails to decode fixed-length sequences with lengths of more than 255
- Decode successfully ignores extra bytes HOT 2
- encode_message() fails to validate ASN.1 BIT STRING SIZE constraints
- how to parse the "CONTAING SEQUENCE" msg immediately HOT 1
- Compile nrppa using PER fail
- How to view encoded values
- Test failures with pyparsing 3.1.1 HOT 4
- oer c code generation fails when addition contains a sequence with enums (type error) HOT 2
- decoding erros HOT 9
- SEQUENCE OF has no maximum length HOT 1
- How to encode a complex json object ?
- ParseError when compile the ASN1 schema file
- OpenType does not exist for xer
- Changing `numeric_enums` parameter has no effect when `cache_dir` is set and cache previously created
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