79 lines
2.0 KiB
Go
79 lines
2.0 KiB
Go
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package main
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import (
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"encoding/json"
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"errors"
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"fmt"
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"net/http"
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"strings"
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"github.com/jcmturner/gokrb5/v8/client"
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"github.com/jcmturner/gokrb5/v8/config"
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"github.com/jcmturner/gokrb5/v8/iana/etypeID"
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"github.com/jcmturner/gokrb5/v8/krberror"
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"github.com/julienschmidt/httprouter"
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)
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func parseETypes(s []string, w bool) []int32 {
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var eti []int32
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for _, et := range s {
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if !w {
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var weak bool
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for _, wet := range strings.Fields(config.WeakETypeList) {
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if et == wet {
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weak = true
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break
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}
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}
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if weak {
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continue
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}
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}
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i := etypeID.EtypeSupported(et)
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if i != 0 {
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eti = append(eti, i)
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}
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}
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return eti
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}
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func checkAuthKrb5(w http.ResponseWriter, _ httprouter.Params, body []byte) (interface{}, error) {
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var lf loginForm
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if err := json.Unmarshal(body, &lf); err != nil {
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return nil, err
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}
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found := false
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for _, u := range localAuthUsers {
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if lf.Login == u {
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found = true
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break
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}
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}
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if !found {
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return nil, fmt.Errorf("You are not allowed to log you in this way. Please use OpenID Connect.")
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}
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cnf := config.New()
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cnf.LibDefaults.DNSLookupKDC = true
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cnf.LibDefaults.DNSLookupRealm = true
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cnf.LibDefaults.DefaultTGSEnctypeIDs = parseETypes(cnf.LibDefaults.DefaultTGSEnctypes, cnf.LibDefaults.AllowWeakCrypto)
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cnf.LibDefaults.DefaultTktEnctypeIDs = parseETypes(cnf.LibDefaults.DefaultTktEnctypes, cnf.LibDefaults.AllowWeakCrypto)
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cnf.LibDefaults.PermittedEnctypeIDs = parseETypes(cnf.LibDefaults.PermittedEnctypes, cnf.LibDefaults.AllowWeakCrypto)
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c := client.NewWithPassword(lf.Login, "CRI.EPITA.FR", lf.Password, cnf)
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if err := c.Login(); err != nil {
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if errk, ok := err.(krberror.Krberror); ok {
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if errk.RootCause == krberror.NetworkingError {
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return nil, errors.New(`{"status": "Authentication system unavailable, please retry."}`)
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} else if errk.RootCause == krberror.KDCError {
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return nil, errors.New(`{"status": "Invalid username or password"}`)
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}
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}
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return nil, err
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} else {
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return dummyAuth(w, nil, body)
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}
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}
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