148 lines
4 KiB
Go
148 lines
4 KiB
Go
// Copyright © 2016 Abcum Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package web
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import (
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"fmt"
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"bytes"
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"encoding/base64"
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"github.com/abcum/fibre"
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"github.com/abcum/surreal/cnf"
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"github.com/abcum/surreal/sql"
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"github.com/dgrijalva/jwt-go"
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)
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func auth() fibre.MiddlewareFunc {
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return func(h fibre.HandlerFunc) fibre.HandlerFunc {
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return func(c *fibre.Context) error {
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auth := map[string]string{"NS": "", "DB": ""}
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c.Set("auth", auth)
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conf := map[string]string{"NS": "", "DB": ""}
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c.Set("conf", conf)
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// Start off with an authentication level
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// which prevents running any sql queries,
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// and denies access to all data.
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c.Set("kind", sql.AuthNO)
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// Check whether there is an Authorization
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// header present, and if there is check
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// whether it is a Basic Auth header.
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// Retrieve the HTTP Authorization header
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// from the request, and continue.
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head := c.Request().Header().Get("Authorization")
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// Check whether the Authorization header
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// is a Basic Auth header, and if it is then
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// process this as root authentication.
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if head != "" && head[:5] == "Basic" {
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base, err := base64.StdEncoding.DecodeString(head[6:])
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if err == nil {
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user := []byte(cnf.Settings.Auth.User)
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pass := []byte(cnf.Settings.Auth.Pass)
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cred := bytes.SplitN(base, []byte(":"), 2)
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if len(cred) == 2 && bytes.Equal(cred[0], user) && bytes.Equal(cred[1], pass) {
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// ------------------------------
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// Root authentication
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// ------------------------------
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c.Set("kind", sql.AuthKV)
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auth["NS"] = "*" // Anything allowed
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conf["NS"] = "" // Must specify
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auth["DB"] = "*" // Anything allowed
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conf["DB"] = "" // Must specify
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return h(c)
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}
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}
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}
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// Check whether the Authorization header
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// is a Bearer Auth header, and if it is then
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// process this as default authentication.
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if head != "" && head[:6] == "Bearer" {
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token, err := jwt.Parse(head[7:], func(token *jwt.Token) (interface{}, error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
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}
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return []byte(cnf.Settings.Auth.Token), nil
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})
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if err == nil && token.Valid {
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// ------------------------------
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// Namespace authentication
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// ------------------------------
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// c.Set("kind", sql.AuthNS)
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// auth["NS"] = "SPECIFIED" // Not allowed to change
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// conf["NS"] = "SPECIFIED" // Not allowed to change
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// auth["DB"] = "*" // Anything allowed
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// conf["DB"] = "" // Must specify
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// ------------------------------
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// Database authentication
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// ------------------------------
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// c.Set("kind", sql.AuthDB)
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// auth["NS"] = "SPECIFIED" // Not allowed to change
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// conf["NS"] = "SPECIFIED" // Not allowed to change
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// auth["DB"] = "SPECIFIED" // Not allowed to change
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// conf["DB"] = "SPECIFIED" // Not allowed to change
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// ------------------------------
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// Scoped authentication
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// ------------------------------
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// c.Set("kind", sql.AuthTB)
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// auth["NS"] = "SPECIFIED" // Not allowed to change
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// conf["NS"] = "SPECIFIED" // Not allowed to change
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// auth["DB"] = "SPECIFIED" // Not allowed to change
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// conf["DB"] = "SPECIFIED" // Not allowed to change
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return h(c)
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}
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}
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if c.Request().Header().Get("Upgrade") == "websocket" {
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return h(c)
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}
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return fibre.NewHTTPError(401)
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}
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}
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}
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