/
authentication.go
70 lines (59 loc) · 2.03 KB
/
authentication.go
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/*
* Copyright (C) 2021 7Cav.us
* This file is part of 7Cav-API <https://github.com/7cav/api>.
*
* 7Cav-API is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 7Cav-API 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 7Cav-API. If not, see <http://www.gnu.org/licenses/>.
*/
package grpc
import (
"context"
"crypto/tls"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/status"
"net/http"
"strings"
)
func ValidateToken(ctx context.Context, req interface{}, grpc *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
Info.Println("checking metadata")
md, ok := metadata.FromIncomingContext(ctx)
if !ok {
Warn.Println("no metadata found on request.. this could be bad")
return nil, status.Errorf(codes.InvalidArgument, "missing metadata")
}
if !valid(md.Get("authorization")) {
Warn.Println("unauthorized attempt on ", grpc.FullMethod)
return nil, status.Errorf(codes.Unauthenticated, "invalid token")
}
return handler(ctx, req)
}
func valid(authorization []string) bool {
if len(authorization) < 1 {
return false
}
token := strings.TrimPrefix(authorization[0], "Bearer ")
// don't worry about insecure cert on auth host
config := &tls.Config{
InsecureSkipVerify: true,
}
tr := &http.Transport{TLSClientConfig: config}
client := &http.Client{Transport: tr}
res, err := client.Get("https://auth.7cav.us/auth/realms/7cav/check?apiKey=" + token)
if err != nil {
Warn.Println("error when calling auth server for token ", err)
return false
}
return res.StatusCode == 200
}