more mschap v2, start peap extension type 33

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

internal/outpost/radius/eap/protocol/mschapv2/auth.go

@@ -0,0 +1,26 @@
+package mschapv2
+
+import (
+	"bytes"
+	"errors"
+
+	"layeh.com/radius/rfc2759"
+)
+
+func (p *Payload) checkChapPassword(res *Response) ([]byte, error) {
+	byteUser := []byte("foo")
+	bytePwd := []byte("bar")
+	ntResponse, err := rfc2759.GenerateNTResponse(p.st.Challenge, p.st.PeerChallenge, byteUser, bytePwd)
+	if err != nil {
+		return nil, err
+	}
+
+	if !bytes.Equal(ntResponse, res.NTResponse) {
+		return nil, errors.New("nt response mismatch")
+	}
+	authenticatorResponse, err := rfc2759.GenerateAuthenticatorResponse(p.st.Challenge, p.st.PeerChallenge, ntResponse, byteUser, bytePwd)
+	if err != nil {
+		return nil, err
+	}
+	return []byte(authenticatorResponse), nil
+}