Add ChaCha20Poly1305 support to HPKE implementation#14393
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reaperhulk merged 1 commit intomainfrom Mar 1, 2026
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Add CHACHA20_POLY1305 as an AEAD option for HPKE (RFC 9180 aead_id 0x0003), alongside the existing AES_128_GCM support. Changes: - Add CHACHA20_POLY1305 variant to the HPKE AEAD enum with parameters (Nk=32, Nn=12, Nt=16) - Make Suite store the selected AEAD and dynamically dispatch to the correct cipher for encrypt/decrypt operations - Make key_schedule return PyBytes directly to avoid unnecessary allocations when passing to AEAD constructors - Make ChaCha20Poly1305 struct and its encrypt/decrypt methods pub(crate) so they can be used from the HPKE module - Update tests to cover ChaCha20Poly1305 roundtrips and RFC 9180 test vector validation - Update type stubs and documentation https://claude.ai/code/session_019vzyAZNnzXmtyAnkc9BHZp
reaperhulk
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Mar 1, 2026
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Add CHACHA20_POLY1305 as an AEAD option for HPKE (RFC 9180 aead_id 0x0003), alongside the existing AES_128_GCM support.
Changes:
https://claude.ai/code/session_019vzyAZNnzXmtyAnkc9BHZp