feat(wsserver): E2E PAKE handshake — X25519 ECDH + AES-256-GCM - #102
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blaspat wants to merge 3 commits into
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feat(wsserver): E2E PAKE handshake — X25519 ECDH + AES-256-GCM#102blaspat wants to merge 3 commits into
blaspat wants to merge 3 commits into
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The Test job in release.yml was failing because HERMES_NODES_TOKEN_KEY is required by the internal auth token system but was not set in CI. Signed-off-by: Blasius Patrick <blasius.patrick@gmail.com>
Server-side counterpart to Go client E2E handshake: - New e2e.py: X25519 keygen, ECDH, HKDF-SHA256 key derivation, HMAC proof verification, AES-256-GCM encrypt/decrypt - server.py: ECDH exchange in hello_ack, proof verification in auth, session key derivation after auth_ok - Encrypted send/receive wrappers in message dispatch loop - Ping/pong responses encrypted via local _send wrapper - Old clients without e2e flag fall back to plaintext auth - All 14 existing tests still pass Signed-off-by: Blasius Patrick <blasius.patrick@gmail.com>
Add End-to-End Encryption section: token never on wire, forward secrecy, MITM resistance, backward compatibility. Link to full e2e-spec.md. Signed-off-by: Blasius Patrick <blasius.patrick@gmail.com>
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Summary
Server-side counterpart to the Go client E2E handshake. Implements the full PAKE-style handshake: X25519 ECDH → HKDF with pairing token → HMAC mutual auth → AES-256-GCM encryption for all operational messages.
Changes
wsserver/e2e.py(new) — X25519 keygen, ECDH, HKDF-SHA256 key derivation, HMAC proof generation/verification, AES-256-GCM encrypt/decryptwsserver/server.py— ECDH exchange inhello_ack, proof verification inauth, session key derivation afterauth_ok. Encrypted send/receive wrappers in message dispatch loop. Ping/pong responses encrypted via local_sendwrapper. Old clients withoute2eflag fall back to plaintext authdocs/e2e-spec.md(new) — Full protocol specification: handshake flow, cryptographic primitives, message structures, error codes, MITM/replay analysisREADME.md— Document E2E encryption with security properties table.github/workflows/release.yml— Fernet key for release workflowSecurity properties
auth_err(4001)e2e: truefall back to legacy plaintext authTest plan
All 14 existing tests still pass. The handshake is backward compatible — old clients without
e2e: truenegotiate plaintext auth.