attempt peap

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

internal/outpost/radius/eap/handler.go

@@ -35,6 +35,8 @@ func (p *Packet) HandleRadiusPacket(w radius.ResponseWriter, r *radius.Request)
 	if err == nil {
 		rres = p.endModifier(rres)
 		switch rp.code {
+		case CodeRequest:
+			rres.Code = radius.CodeAccessChallenge
 		case CodeFailure:
 			rres.Code = radius.CodeAccessReject
 		case CodeSuccess:
@@ -81,13 +83,18 @@ func (p *Packet) handleInner(r *radius.Request) (*Packet, error) {
 		}, err
 	}
 
-	if _, ok := p.Payload.(*legacy_nak.Payload); ok {
-		log.Debug("EAP: received NAK, trying next protocol")
+	next := func() (*Packet, error) {
 		st.ProtocolIndex += 1
 		p.stm.SetEAPState(p.state, st)
 		return p.handleInner(r)
 	}
 
+	if _, ok := p.Payload.(*legacy_nak.Payload); ok {
+		log.Debug("EAP: received NAK, trying next protocol")
+		p.Payload = nil
+		return next()
+	}
+
 	np, _ := emptyPayload(p.stm, nextChallengeToOffer)
 
 	ctx := &context{
@@ -96,6 +103,10 @@ func (p *Packet) handleInner(r *radius.Request) (*Packet, error) {
 		log:      log.WithField("type", fmt.Sprintf("%T", np)),
 		settings: p.stm.GetEAPSettings().ProtocolSettings[np.Type()],
 	}
+	if !np.Offerable() {
+		ctx.log.Debug("EAP: protocol not offerable, skipping")
+		return next()
+	}
 	ctx.log.Debug("EAP: Passing to protocol")
 
 	res := p.GetChallengeForType(ctx, np)
@@ -115,9 +126,7 @@ func (p *Packet) handleInner(r *radius.Request) (*Packet, error) {
 		res.id -= 1
 	case protocol.StatusNextProtocol:
 		ctx.log.Debug("EAP: Protocol ended, starting next protocol")
-		st.ProtocolIndex += 1
-		p.stm.SetEAPState(p.state, st)
-		return p.handleInner(r)
+		return next()
 	case protocol.StatusUnknown:
 	}
 	return res, nil

internal/outpost/radius/eap/peap/payload.go

@@ -0,0 +1,42 @@
+package peap
+
+import (
+	log "github.com/sirupsen/logrus"
+	"goauthentik.io/internal/outpost/radius/eap/debug"
+	"goauthentik.io/internal/outpost/radius/eap/protocol"
+	"goauthentik.io/internal/outpost/radius/eap/tls"
+)
+
+const TypePEAP protocol.Type = 25
+
+func Protocol() protocol.Payload {
+	return &tls.Payload{
+		Inner: &Payload{},
+	}
+}
+
+type Payload struct {
+}
+
+func (p *Payload) Type() protocol.Type {
+	return TypePEAP
+}
+
+func (p *Payload) Decode(raw []byte) error {
+	log.WithField("raw", debug.FormatBytes(raw)).Debug("PEAP: Decode")
+	return nil
+}
+
+func (p *Payload) Encode() ([]byte, error) {
+	log.Debug("PEAP: Encode")
+	return []byte{}, nil
+}
+
+func (p *Payload) Handle(ctx protocol.Context) protocol.Payload {
+	log.Debug("PEAP: Handle")
+	return &Payload{}
+}
+
+func (p *Payload) Offerable() bool {
+	return true
+}

internal/outpost/radius/eap/tls/inner.go

@@ -0,0 +1,21 @@
+package tls
+
+import (
+	"goauthentik.io/internal/outpost/radius/eap/protocol"
+)
+
+func (p *Payload) innerHandler(ctx protocol.Context) *Payload {
+	// p.st.TLS.read
+	// d, _ := io.ReadAll(p.st.TLS)
+	err := p.Inner.Decode([]byte{})
+	if err != nil {
+		ctx.Log().WithError(err).Warning("TLS: failed to decode inner protocol")
+		ctx.EndInnerProtocol(protocol.StatusError, nil)
+		return nil
+	}
+	pl := p.Inner.Handle(ctx)
+	enc, err := pl.Encode()
+	return &Payload{
+		Data: enc,
+	}
+}

internal/outpost/radius/eap/tls/payload.go

@@ -30,10 +30,14 @@ type Payload struct {
 	Length uint32
 	Data   []byte
 
-	st *State
+	st    *State
+	Inner protocol.Payload
 }
 
 func (p *Payload) Type() protocol.Type {
+	if p.Inner != nil {
+		return p.Inner.Type()
+	}
 	return TypeTLS
 }
 
@@ -118,6 +122,10 @@ func (p *Payload) Handle(ctx protocol.Context) protocol.Payload {
 	}
 	if p.st.Conn.writer.Len() == 0 && p.st.HandshakeDone {
 		defer p.st.ContextCancel()
+		if p.Inner != nil {
+			ctx.Log().Debug("TLS: Handshake is done, delegating to inner protocol")
+			return p.innerHandler(ctx)
+		}
 		// If we don't have a final status from the handshake finished function, stall for time
 		pst, _ := retry.DoWithData(
 			func() (protocol.Status, error) {
@@ -153,6 +161,7 @@ func (p *Payload) tlsInit(ctx protocol.Context) {
 		return nil, nil
 	}
 	p.st.TLS = tls.Server(p.st.Conn, cfg)
+	p.st.TLS.SetDeadline(time.Now().Add(staleConnectionTimeout * time.Second))
 	go func() {
 		err := p.st.TLS.HandshakeContext(p.st.Context)
 		if err != nil {
@@ -188,7 +197,9 @@ func (p *Payload) tlsHandshakeFinished(ctx protocol.Context) {
 	ctx.Log().Debugf("TLS: ksm % x %v", ksm, err)
 	p.st.MPPEKey = ksm
 	p.st.HandshakeDone = true
-	p.st.FinalStatus = ctx.ProtocolSettings().(Settings).HandshakeSuccessful(ctx, cs.PeerCertificates)
+	if p.Inner == nil {
+		p.st.FinalStatus = ctx.ProtocolSettings().(Settings).HandshakeSuccessful(ctx, cs.PeerCertificates)
+	}
 }
 
 func (p *Payload) startChunkedTransfer(data []byte) *Payload {

internal/outpost/radius/handle_access_request.go

@@ -14,6 +14,7 @@ import (
 	"goauthentik.io/internal/outpost/radius/eap"
 	"goauthentik.io/internal/outpost/radius/eap/identity"
 	"goauthentik.io/internal/outpost/radius/eap/legacy_nak"
+	"goauthentik.io/internal/outpost/radius/eap/peap"
 	"goauthentik.io/internal/outpost/radius/eap/protocol"
 	"goauthentik.io/internal/outpost/radius/eap/tls"
 	"goauthentik.io/internal/outpost/radius/metrics"
@@ -150,9 +151,10 @@ func (pi *ProviderInstance) GetEAPSettings() eap.Settings {
 	}
 
 	return eap.Settings{
-		Protocols: append(protocols, tls.Protocol),
+		Protocols: append(protocols, tls.Protocol, peap.Protocol),
 		ProtocolPriority: []protocol.Type{
 			tls.TypeTLS,
+			peap.TypePEAP,
 		},
 		ProtocolSettings: map[protocol.Type]interface{}{
 			tls.TypeTLS: tls.Settings{
@@ -187,6 +189,11 @@ func (pi *ProviderInstance) GetEAPSettings() eap.Settings {
 					}
 				},
 			},
+			peap.TypePEAP: tls.Settings{
+				Config: &ttls.Config{
+					Certificates: []ttls.Certificate{*cert},
+				},
+			},
 		},
 	}
 }