81 lines
1.8 KiB
Go
81 lines
1.8 KiB
Go
package eap
|
|
|
|
import (
|
|
"crypto/hmac"
|
|
"crypto/md5"
|
|
"encoding/base64"
|
|
|
|
"github.com/gorilla/securecookie"
|
|
"goauthentik.io/internal/outpost/radius/eap/tls"
|
|
"layeh.com/radius"
|
|
"layeh.com/radius/rfc2865"
|
|
"layeh.com/radius/rfc2869"
|
|
)
|
|
|
|
func (p *Packet) Handle(stm StateManager, w radius.ResponseWriter, r *radius.Packet) {
|
|
rst := rfc2865.State_GetString(r)
|
|
if rst == "" {
|
|
rst = base64.StdEncoding.EncodeToString(securecookie.GenerateRandomKey(12))
|
|
}
|
|
st := stm.GetEAPState(rst)
|
|
if st == nil {
|
|
st = BlankState(stm.GetEAPSettings())
|
|
}
|
|
if len(st.ChallengesToOffer) < 1 {
|
|
panic("No more challenges")
|
|
}
|
|
nextChallengeToOffer := st.ChallengesToOffer[0]
|
|
res, newState := p.GetChallengeForType(st, nextChallengeToOffer)
|
|
stm.SetEAPState(rst, newState)
|
|
|
|
rres := r.Response(radius.CodeAccessChallenge)
|
|
rfc2865.State_SetString(rres, rst)
|
|
eapEncoded, err := res.Encode()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
rfc2869.EAPMessage_Set(rres, eapEncoded)
|
|
p.setMessageAuthenticator(rres)
|
|
// debug.DebugPacket(rres)
|
|
err = w.Write(rres)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
|
|
func (p *Packet) GetChallengeForType(st *State, t Type) (*Packet, *State) {
|
|
res := &Packet{
|
|
code: CodeRequest,
|
|
id: p.id + 1,
|
|
msgType: t,
|
|
}
|
|
var payload any
|
|
var tst any
|
|
switch t {
|
|
case TypeTLS:
|
|
cp := tls.Payload{}
|
|
cp.Decode(p.rawPayload)
|
|
payload, tst = cp.Handle(st.TypeState[t])
|
|
}
|
|
st.TypeState[t] = tst
|
|
res.Payload = payload.(Payload)
|
|
return res, st
|
|
}
|
|
|
|
func (p *Packet) setMessageAuthenticator(rp *radius.Packet) {
|
|
err := rfc2869.MessageAuthenticator_Set(rp, make([]byte, 16))
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
hash := hmac.New(md5.New, rp.Secret)
|
|
encode, err := rp.MarshalBinary()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
hash.Write(encode)
|
|
err = rfc2869.MessageAuthenticator_Set(rp, hash.Sum(nil))
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
}
|