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cmd/geth, node, rpc: implement jwt tokens (ethereum#24364)
* 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>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| // 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) | ||
| } | ||
| } |
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