DER-Encoded ASN.1 Serialization and Deserialization
Project description
Bran provides transcoders for ASN.1 serialization and deserialization, and DER-encoding.
The purpose is to provide a serialization format for native Python types, such as nested dicts, whose serialization is unambiguous and stable, that is two values with the same contents serialize to the same byte string.
That makes it possible to create hashes and MACs to verify message integrity.
Usage
Code
You just encode some values. In most cases, you’ll want to use the DERTranscoder class.
test = { 'some': { 'nested': 42, 'value': (0, 1, False) } }
from bran import DERTranscoder
transcoder = DERTranscoder()
encoded = transcoder.encode(test)
decoded = transcoder.decode(encoded)
assert decoded == test
In order for bran to be this simple to use, some assumptions are made. The one with the most impact is that it treats any collections.Mapping will be encoded to the same byte representation, which means when decoded, it will become a Python dict. Similar assumptions are made for collections.Set and collections.Sequence.
Setup
Use virtualenv to create a virtual environment and change to it or not, as you see fit.
Then install the requirements:
$ pip install -r requirements.txt
Documentation
After setup, run the following to generate documentation:
$ python setup.py build_sphinx
Development
Test Execution
Run the whole test suite:
$ python setup.py test
Run a single test scenario:
$ pytest tests/test_asn1transcoder.py::test_none
Run tests on multiple Python versions:
$ tox
Run tests on Python 2.7:
$ tox -e py27
A simple test coverage report is automatically generated.
License
Licensed under MITNFA (MIT +no-false-attribs) License. See the LICENSE.txt file for details.
Project details
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