luxfi/age

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Hanzo AI 96c29ed322 age: remove Liquidity branding cross-contamination

Replace the liquidity.io/v1 CRD apiVersion sample with a neutral
lux.network/v1 example. The roadmap documents Lux replicate semantics —
operator-specific CRD names belong in the operator's repo.

2026-05-05 19:21:54 -07:00

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Post-Quantum Roadmap

Two KEMs, Both First-Class

luxfi/age supports two hybrid post-quantum KEMs. Callers choose at runtime.

1. HPKE ML-KEM-768 + X25519 (shipped v1.3.0+)

Type: HybridRecipient / HybridIdentity in pq.go
Algorithm: ML-KEM-768 + X25519 via filippo.io/hpke MLKEM768X25519 suite
Stanza type: mlkem768x25519
Key prefix: age1pq1 (Bech32)
Label: "age-encryption.org/mlkem768x25519"
When to use: compatibility with existing keys, audited via FiloSottile age v1.3.0+

2. X-Wing (IETF draft-connolly-cfrg-xwing-kem-10)

Type: XWingRecipient / XWingIdentity in xwing.go
Algorithm: ML-KEM-768 + X25519 with SHA3-256 combiner + 6-byte XWingLabel
Stanza type: xwing
Key prefix: age1xw1 (Bech32)
Label: "age-encryption.org/xwing"
When to use: smaller code path, official IETF draft, simpler combiner, planned for FIPS hybrid mode

Configurable KEM Selection (REQUIRED)

A. Auto-detect from key prefix

// Zero-config: prefix determines KEM
r, _ := age.ParseRecipient("age1pq1...")  // -> HybridRecipient (HPKE MLKEM768X25519)
r, _ := age.ParseRecipient("age1xw1...")  // -> XWingRecipient (real X-Wing)

B. Env var for default keygen

ENCRYPTION_KEM=hpke-mlkem768x25519|xwing   # default: xwing for new keys

CLI flags:

age-keygen --pq          # uses ENCRYPTION_KEM or default (xwing)
age-keygen --pq=hpke     # force HPKE MLKEM768X25519
age-keygen --pq=xwing    # force X-Wing

C. Programmatic API

import "github.com/luxfi/age"

type PQKemType string
const (
    PQKemHPKEMLKEM768X25519 PQKemType = "hpke-mlkem768x25519"
    PQKemXWing              PQKemType = "xwing"
)

// New: select KEM at keygen
identity, _ := age.GeneratePQIdentity(age.PQKemXWing)

// Existing: unchanged, backward compat (HPKE MLKEM768X25519)
identity, _ := age.GenerateHybridIdentity()

D. Replicate sidecar config

REPLICATE_AGE_RECIPIENT=age1xw1...              # auto-detects from prefix
REPLICATE_KEM_PREFERENCE=xwing|hpke              # optional, for new key generation
REPLICATE_AGE_RECIPIENTS_FALLBACK=age1pq1...     # comma-separated, multi-recipient migration

E. Operator CRD

apiVersion: lux.network/v1
kind: ReplicateConfig
spec:
  encryption:
    kem: xwing                    # enum: hpke-mlkem768x25519 | xwing
    recipients:                   # multiple supported
      - age1xw1...
      - age1pq1...               # encrypt to both during migration

Migration Path

Encrypt to BOTH recipient types simultaneously during transition:

age -r age1pq1aaa... -r age1xw1bbb... -o file.age plaintext

Decryption tries each available identity until one works. No special code needed.

Generate new X-Wing keys alongside existing HPKE keys
Encrypt to both recipients (multi-recipient)
Once all consumers have X-Wing identities, drop HPKE recipients
Old archives remain decryptable as long as HPKE identity is retained

Security

Harvest-now-decrypt-later safe: both KEMs use ML-KEM-768 against future quantum computers
Hybrid: if ML-KEM is broken, X25519 still provides classical security
Anonymous: attacker can't tell which recipient a message is encrypted to
Label enforcement: PQ recipients can only be mixed with other PQ recipients (prevents downgrade)

References

LP-102: Encrypted SQLite Replication Standard
NIST FIPS 203 (ML-KEM) — finalized August 2024
IETF draft-connolly-cfrg-xwing-kem-10 — X-Wing hybrid KEM
filippo.io/hpke — HPKE with ML-KEM-768 + X25519

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