packages: Add lakers-python

packages/lakers-python/meta.yaml

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+package:
+  name: lakers-python
+  version: 0.3.0
+  top-level:
+    - lakers
+source:
+  url: https://files.pythonhosted.org/packages/29/93/5d70b035f987a48dd854c1afc21025fb8446aae4d43c685b68691175623c/lakers_python-0.3.0.tar.gz
+  sha256: 009fc5e31b5a9a276216ff43ffd097004396a2a9131359a1da35d464e599cd1c
+build:
+  script: |
+    cargo update -p proc-macro2 --precise 1.0.60
+requirements:
+  executable:
+    - rustup
+about:
+  home: https://github.com/openwsn-berkeley/lakers/
+  PyPI: https://pypi.org/project/lakers-python/
+  summary: An implementation of EDHOC (RFC 9528)
+  license: BSD-3-Clause

packages/lakers-python/test_cbor_diag.py

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+from pytest_pyodide import run_in_pyodide
+
+@run_in_pyodide(packages=["lakers-python"])
+def test_lakers_python(selenium_standalone):
+    import lakers
+
+    # Running an exchange needs some keys and credentials; those are from the EDHOC test vectors.
+    R = bytes.fromhex("72cc4761dbd4c78f758931aa589d348d1ef874a7e303ede2f140dcf3e6aa4aac")
+    CRED_R = bytes.fromhex("A2026008A101A5010202410A2001215820BBC34960526EA4D32E940CAD2A234148DDC21791A12AFBCBAC93622046DD44F02258204519E257236B2A0CE2023F0931F1F386CA7AFDA64FCDE0108C224C51EABF6072")
+
+    initiator = lakers.EdhocInitiator()
+    responder = lakers.EdhocResponder(R, CRED_R)
+
+    message_1 = initiator.prepare_message_1()
+    responder.process_message_1(message_1)
+    _message_2 = responder.prepare_message_2(lakers.CredentialTransfer.ByReference, None, None)
+
+    # There's a lot more that can be tested, but if this runs through, we've covered the most critical kinds of operations.