Add HPKE export-only AEAD support#911
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Closes #890
Summary
This adds support for the HPKE export-only AEAD identifier (
0xFFFF) from RFC 9180.Changes:
HPKE.AEAD.EXPORT_ONLY.HPKE_Cipher.export(exporter_context, length).HPKE.new(..., aead_id=0xFFFF).seal()andunseal()on export-only contexts with a clearValueError.Tests
aead_id=0xFFFF.seal()/unseal()on export-only contexts.Verified with:
env PYTHONPATH=lib python3 -m Crypto.SelfTest.Protocol.test_HPKE env PYTHONPATH=lib:test_vectors python3 -c "import unittest; from Crypto.SelfTest.Protocol import test_HPKE; suite = unittest.TestSuite(test_HPKE.get_tests({'slow_tests': True})); result = unittest.TextTestRunner().run(suite); raise SystemExit(0 if result.wasSuccessful() else 1)" git diff --check