wire.go: the validated serialization boundary between parties. Crypto objects
(group elements, public keys, Schnorr proofs, ciphertexts) travel as decimal
DTOs; every decode routes through NewGqElement/NewZqElement so a peer cannot
inject a value outside G_q or Z_q — closing the small-subgroup / non-residue
hole (finding M4) at the trust boundary.
setup.go: RunSetup drives distributed key generation over the bus. Each CC
generates its ElGamal keypair + return-code secret PRIVATELY and returns only
its public key and Schnorr proofs; the setup component verifies every proof on
receipt before combining keys. The electoral board derives its own key and
returns only the public key. Combined election PK and setup artifacts are
published to the public transcript.
Test confirms the combined election key equals the product of the individually
generated CC and EB keys, and that private key material stays with each party
(never appears in the transcript).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
pkg/party models each endpoint of the system as a separate object holding only
its own private state, wired together through the transport bus.
- ceremony.go: NewCeremony bootstraps the Ed25519 root CA, enrolls all parties
(setup, 4 CCs, electoral board, voting server, verifier, N voters) with
CA-signed identity certs, registers each in the directory, and wires its
handler into the bus.
- parties.go: the six party types and a shared hello/ack handshake; Handshake()
proves the full sign -> route -> verify -> reply -> verify path for every
party before any election logic runs.
- state.go: per-party private state structs (nothing shared across parties).
- transcript.go: PublicTranscript, the append-only bulletin board a remote
verifier will consume (no secrets).
- phases.go: phase handlers reject unknown message types cleanly (the transport
boundary never panics on unexpected input) — filled in over the next commits.
Transport CA API simplified to own its serial counter (NewCA/Issue).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
