ASN.1 tools.
Project description
About
A Python package for ASN.1 parsing, encoding and decoding.
This project is under development and does only support a subset of the ASN.1 specification syntax and BER codec.
Project homepage: https://github.com/eerimoq/asn1tools
Documentation: http://asn1tools.readthedocs.org/en/latest
Installation
pip install asn1toolsExample Usage
This is an example ASN.1 specification defining the messages of a fictitious Foo protocol (based on the FooProtocol on Wikipedia).
Foo DEFINITIONS ::= BEGIN
Question ::= SEQUENCE {
id INTEGER,
question IA5String
}
Answer ::= SEQUENCE {
id INTEGER,
answer BOOLEAN
}
ENDCompile the ASN.1 specification, and encode and decode a question using the default codec (BER).
>>> import asn1tools
>>> foo = asn1tools.compile_file('tests/files/foo.asn')
>>> encoded = foo.encode('Question', {'id': 1, 'question': 'Is 1+1=3?'})
>>> encoded
b'0\x0e\x02\x01\x01\x16\x09Is 1+1=3?'
>>> foo.decode('Question', encoded)
{'id': 1, 'question': 'Is 1+1=3?'}See the test suite for additional examples: https://github.com/eerimoq/asn1tools/blob/master/tests/test_asn1tools.py
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