feat(quorum): real Ed25519 validator signatures (sovereign-key crypto) - #322
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feat(quorum): real Ed25519 validator signatures (sovereign-key crypto)#322mdheller wants to merge 1 commit into
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…quorum (Rust fusion) A device joins the fleet only if BOTH hold: its boot ATTESTS (watchdog_validator::attest_boot, measured chain vs pinned policy, dm-verity-bound) AND a validator quorum CRYPTOGRAPHICALLY co-signs THIS enrollment (verify_quorum_signed over enrollment_payload_hash, which binds the device + its exact measured boot). Neither half alone suffices: an attested boot with no quorum is a device nobody vouched for; a quorum with no attestation vouches for an unmeasured box. enroll_device() fuses #321 (attest_boot) + #322 (Ed25519 quorum). quorumd now depends on watchdog-validator + sha2. Fail-closed; pure Rust, cross-silicon. The payload hash binds the vote to device+boot so a quorum can't be replayed onto another device. +3 tests (15 quorumd total): enrolls with both, rejects unattested-boot-with-valid-quorum, rejects quorum-bound-to-a-different-device. This completes the canon Genesis binding on-device.
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Merged into main via #323 (the stack top carried all three commits: attest → Ed25519 quorum → enrollment). |
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Last mile of the quorum verifier: real Ed25519 signature verification. verify_quorum_signed requires each signature to cryptographically verify against the signer's REGISTERED public key over signed_payload_hash — an attacker can't forge a validator's vote without its private key. Ed25519 = NitroKey/sovereign-key form, pure Rust, cross-silicon (aarch64/x86_64/riscv64). Keys pinned out-of-band (Genesis enrollment). Fail-closed: unregistered signer, forged sig, wrong-payload sig, sub-threshold all reject. +4 real-keypair tests (12 quorumd total). Stacked on #321; follow-up ES256/WebAuthn. Not auto-merging.