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TUN-8855: Update PQ curve preferences

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## Summary

Nowadays, Cloudflared only supports X25519Kyber768Draft00 (0x6399,25497) but older versions may use different preferences.

For FIPS compliance we are required to use P256Kyber768Draft00 (0xfe32,65074) which is supported in our internal fork of [Go-Boring-1.22.10](https://bitbucket.cfdata.org/projects/PLAT/repos/goboring/browse?at=refs/heads/go-boring/1.22.10 "Follow link").

In the near future, Go will support by default the X25519MLKEM768 (0x11ec,4588) given this we may drop the usage of our public fork of GO.

To summarise:

* Cloudflared FIPS: QUIC_CURVE_PREFERENCES=65074
* Cloudflared non-FIPS: QUIC_CURVE_PREFERENCES=4588

Closes TUN-8855
This commit is contained in:
Luis Neto
2025-01-30 05:02:47 -08:00
committed by João "Pisco" Fernandes
parent bfdb0c76dc
commit 31a870b291
11 changed files with 150 additions and 41 deletions
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5
supervisor/tunnel.go
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@@ -20,6 +20,7 @@ import (
"github.com/cloudflare/cloudflared/edgediscovery"
"github.com/cloudflare/cloudflared/edgediscovery/allregions"
"github.com/cloudflare/cloudflared/features"
"github.com/cloudflare/cloudflared/fips"
"github.com/cloudflare/cloudflared/ingress"
"github.com/cloudflare/cloudflared/management"
"github.com/cloudflare/cloudflared/orchestration"
@@ -555,11 +556,13 @@ func (e *EdgeTunnelServer) serveQUIC(
tlsConfig := e.config.EdgeTLSConfigs[connection.QUIC]
pqMode := e.config.FeatureSelector.PostQuantumMode()
curvePref, err := curvePreference(pqMode, tlsConfig.CurvePreferences)
curvePref, err := curvePreference(pqMode, fips.IsFipsEnabled(), tlsConfig.CurvePreferences)
if err != nil {
return err, true
}
connLogger.Logger().Info().Msgf("Using %v as curve preferences", curvePref)
tlsConfig.CurvePreferences = curvePref
// quic-go 0.44 increases the initial packet size to 1280 by default. That breaks anyone running tunnel through WARP