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jwt.go
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jwt.go
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/*
* Copyright (c) 2019-2021. Abstrium SAS <team (at) pydio.com>
* This file is part of Pydio Cells.
*
* Pydio Cells is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pydio Cells 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Pydio Cells. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <https://pydio.com>.
*/
package service
import (
"context"
"net/http"
"strings"
"github.com/micro/go-micro"
"github.com/micro/go-micro/server"
"go.uber.org/zap"
"github.com/pydio/cells/common"
"github.com/pydio/cells/common/auth"
"github.com/pydio/cells/common/auth/claim"
"github.com/pydio/cells/common/log"
)
func isRestApiPublicMethod(r *http.Request) bool {
return r.Method == "GET" && strings.HasPrefix(r.RequestURI, "/frontend/state")
}
func newClaimsProvider(service micro.Service) error {
var options []micro.Option
options = append(options, micro.WrapHandler(NewClaimsHandlerWrapper()))
service.Init(options...)
return nil
}
// NewClaimsHandlerWrapper decodes json claims passed via context metadata ( = headers ) and
// sets Claims as a proper value in the context
func NewClaimsHandlerWrapper() server.HandlerWrapper {
return func(h server.HandlerFunc) server.HandlerFunc {
return func(ctx context.Context, req server.Request, rsp interface{}) error {
if claims, exists := auth.ClaimsFromMetadata(ctx); exists {
ctx = context.WithValue(ctx, claim.ContextKey, claims)
}
err := h(ctx, req, rsp)
return err
}
}
}
// JWTHttpWrapper captures and verifies a JWT token if it's present in the headers.
// Warning: it goes through if there is no JWT => the next handlers
// must verify if a valid user was found or not.
func JWTHttpWrapper(h http.Handler) http.Handler {
jwtVerifier := auth.DefaultJWTVerifier()
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
c := r.Context()
log.Logger(c).Debug("JWTHttpHandler: Checking JWT")
if val, ok1 := r.Header["Authorization"]; ok1 {
whole := strings.Join(val, "")
rawIDToken := strings.TrimPrefix(strings.Trim(whole, ""), "Bearer ")
//var claims claim.Claims
var err error
c, _, err = jwtVerifier.Verify(c, rawIDToken)
if err != nil {
log.Logger(context.Background()).Debug("jwtVerifier Error", zap.Error(err))
if isRestApiPublicMethod(r) {
h.ServeHTTP(w, r) // Serve an empty state
return
}
if isNetworkError(err) {
w.WriteHeader(503)
w.Write([]byte("Service unavailable.\n"))
} else {
// This is a wrong JWT, go out with error
w.WriteHeader(401)
w.Write([]byte("Unauthorized.\n"))
log.Auditer(c).Error(
"Blocked invalid JWT",
log.GetAuditId(common.AuditInvalidJwt),
)
}
return
}
}
r = r.WithContext(c)
h.ServeHTTP(w, r)
})
}