50 lines
2.0 KiB
Markdown
50 lines
2.0 KiB
Markdown
---
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id: transport/acme-cert-provisioning
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name: Implement ACME Lets Encrypt certificate provisioning (feature-gated acme)
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status: pending
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depends_on:
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- transport/tls-transport
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scope: moderate
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risk: high
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impact: component
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level: implementation
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---
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## Description
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Implement automatic TLS certificate provisioning via ACME (Let's Encrypt). Two modes per ADR-008:
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1. **Domain-based ACME** (`--acme-domain`): Standard flow with HTTP-01 or TLS-ALPN-01 challenges. Domain-bound, auto-renewing.
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2. **IP-based ACME**: Short-lived certs via TLS-ALPN-01 on port 443. No domain needed.
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Uses `rustls-acme` (pure Rust) to avoid external certbot dependency. Feature-gated behind `acme` (implies `tls`).
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This integrates with `TlsAcceptor` by providing ACME-resolved certificates instead of manual cert/key files.
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## Acceptance Criteria
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- [ ] `crates/wraith-core/src/transport/acme.rs` (behind `#[cfg(feature = "acme")]`)
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- [ ] Feature `acme` implies `tls` in Cargo.toml
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- [ ] `AcmeCertProvider` struct accepts: domain (domain-based) or IP mode flag
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- [ ] Domain-based mode: uses `rustls-acme` with HTTP-01/TLS-ALPN-01 challenge responder
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- [ ] IP-based mode: uses `rustls-acme` with TLS-ALPN-01 on port 443
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- [ ] `AcmeCertProvider` produces a `rustls::ServerConfig` that `TlsAcceptor` can use
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- [ ] Certificate auto-renewal handled by `rustls-acme` background task
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- [ ] `TlsAcceptor` updated to accept either manual certs OR an `AcmeCertProvider`
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- [ ] Integration with `TlsAcceptor::bind_acme()` or similar constructor
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- [ ] Unit tests for ACME config construction (challenge responder setup)
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- [ ] Integration test: ACME cert provisioning with Let's Encrypt staging (marked `#[ignore]` for CI)
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## References
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- docs/architecture/server.md — TLS certificate provisioning modes
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- docs/architecture/decisions/008-acme-lets-encrypt.md — ACME design, rustls-acme choice
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- docs/architecture/transport.md — feature flags, TLS transport constraints
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## Notes
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> To be filled by implementation agent
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## Summary
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> To be filled on completion |