forked from cerc-io/plugeth
4860e50e05
* rpc, node: refactor request validation and add jwt validation * node, rpc: fix error message, ignore engine api in RegisterAPIs * node: make authenticated port configurable * eth/catalyst: enable unauthenticated version of engine api * node: rework obtainjwtsecret (backport later) * cmd/geth: added auth port flag * node: happy lint, happy life * node: refactor authenticated api Modifies the authentication mechanism to use default values * node: trim spaces and newline away from secret Co-authored-by: Marius van der Wijden <m.vanderwijden@live.de>
79 lines
2.6 KiB
Go
79 lines
2.6 KiB
Go
// Copyright 2022 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package node
|
|
|
|
import (
|
|
"net/http"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/golang-jwt/jwt/v4"
|
|
)
|
|
|
|
type jwtHandler struct {
|
|
keyFunc func(token *jwt.Token) (interface{}, error)
|
|
next http.Handler
|
|
}
|
|
|
|
// newJWTHandler creates a http.Handler with jwt authentication support.
|
|
func newJWTHandler(secret []byte, next http.Handler) http.Handler {
|
|
return &jwtHandler{
|
|
keyFunc: func(token *jwt.Token) (interface{}, error) {
|
|
return secret, nil
|
|
},
|
|
next: next,
|
|
}
|
|
}
|
|
|
|
// ServeHTTP implements http.Handler
|
|
func (handler *jwtHandler) ServeHTTP(out http.ResponseWriter, r *http.Request) {
|
|
var (
|
|
strToken string
|
|
claims jwt.RegisteredClaims
|
|
)
|
|
if auth := r.Header.Get("Authorization"); strings.HasPrefix(auth, "Bearer ") {
|
|
strToken = strings.TrimPrefix(auth, "Bearer ")
|
|
}
|
|
if len(strToken) == 0 {
|
|
http.Error(out, "missing token", http.StatusForbidden)
|
|
return
|
|
}
|
|
// We explicitly set only HS256 allowed, and also disables the
|
|
// claim-check: the RegisteredClaims internally requires 'iat' to
|
|
// be no later than 'now', but we allow for a bit of drift.
|
|
token, err := jwt.ParseWithClaims(strToken, &claims, handler.keyFunc,
|
|
jwt.WithValidMethods([]string{"HS256"}),
|
|
jwt.WithoutClaimsValidation())
|
|
|
|
switch {
|
|
case err != nil:
|
|
http.Error(out, err.Error(), http.StatusForbidden)
|
|
case !token.Valid:
|
|
http.Error(out, "invalid token", http.StatusForbidden)
|
|
case !claims.VerifyExpiresAt(time.Now(), false): // optional
|
|
http.Error(out, "token is expired", http.StatusForbidden)
|
|
case claims.IssuedAt == nil:
|
|
http.Error(out, "missing issued-at", http.StatusForbidden)
|
|
case time.Since(claims.IssuedAt.Time) > 5*time.Second:
|
|
http.Error(out, "stale token", http.StatusForbidden)
|
|
case time.Until(claims.IssuedAt.Time) > 5*time.Second:
|
|
http.Error(out, "future token", http.StatusForbidden)
|
|
default:
|
|
handler.next.ServeHTTP(out, r)
|
|
}
|
|
}
|