100 lines
3.8 KiB
Go
100 lines
3.8 KiB
Go
// Copyright or © or Copr. happyDNS (2021)
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//
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// contact@happydns.org
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//
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// This software is a computer program whose purpose is to provide a modern
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// interface to interact with DNS systems.
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//
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// This software is governed by the CeCILL license under French law and abiding
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// by the rules of distribution of free software. You can use, modify and/or
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// redistribute the software under the terms of the CeCILL license as
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// circulated by CEA, CNRS and INRIA at the following URL
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// "http://www.cecill.info".
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//
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// As a counterpart to the access to the source code and rights to copy, modify
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// and redistribute granted by the license, users are provided only with a
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// limited warranty and the software's author, the holder of the economic
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// rights, and the successive licensors have only limited liability.
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//
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// In this respect, the user's attention is drawn to the risks associated with
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// loading, using, modifying and/or developing or reproducing the software by
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// the user in light of its specific status of free software, that may mean
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// that it is complicated to manipulate, and that also therefore means that it
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// is reserved for developers and experienced professionals having in-depth
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// computer knowledge. Users are therefore encouraged to load and test the
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// software's suitability as regards their requirements in conditions enabling
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// the security of their systems and/or data to be ensured and, more generally,
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// to use and operate it in the same conditions as regards security.
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//
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// The fact that you are presently reading this means that you have had
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// knowledge of the CeCILL license and that you accept its terms.
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package api
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import (
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"encoding/base64"
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"fmt"
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"log"
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"net/http"
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"strings"
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"github.com/gin-gonic/gin"
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"git.happydns.org/happydns/config"
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"git.happydns.org/happydns/storage"
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)
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const COOKIE_NAME = "happydns_session"
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func authMiddleware(opts *config.Options, optional bool) gin.HandlerFunc {
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return func(c *gin.Context) {
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var sessionid []byte
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// Retrieve the session from cookie or header
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if cookie, err := c.Cookie(COOKIE_NAME); err == nil {
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if sessionid, err = base64.StdEncoding.DecodeString(cookie); err != nil {
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c.SetCookie(COOKIE_NAME, "", -1, opts.BaseURL+"/", "", opts.DevProxy == "", true)
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c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"errmsg": fmt.Sprintf("Unable to authenticate request due to invalid cookie value: %s", err.Error())})
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return
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}
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} else if flds := strings.Fields(c.GetHeader("Authorization")); len(flds) == 2 && flds[0] == "Bearer" {
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if sessionid, err = base64.StdEncoding.DecodeString(flds[1]); err != nil {
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c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"errmsg": fmt.Sprintf("Unable to authenticate request due to invalid Authorization header value: %s", err.Error())})
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return
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}
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}
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// Stop here if there is no cookie and we allow no auth
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if optional && (sessionid == nil || len(sessionid) == 0) {
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c.Next()
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return
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}
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session, err := storage.MainStore.GetSession(sessionid)
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if err != nil {
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log.Printf("%s tries an invalid session: %s", c.ClientIP(), err.Error())
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c.SetCookie(COOKIE_NAME, "", -1, opts.BaseURL+"/", "", opts.DevProxy == "", true)
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c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"errmsg": fmt.Sprintf("Your session has expired. Please reconnect.")})
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return
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}
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c.Set("MySession", session)
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user, err := storage.MainStore.GetUser(session.IdUser)
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if err != nil {
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log.Printf("%s has a correct session, but related user is invalid: %s", c.ClientIP(), err.Error())
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c.SetCookie(COOKIE_NAME, "", -1, opts.BaseURL+"/", "", opts.DevProxy == "", true)
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c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"errmsg": fmt.Sprintf("Something goes wrong with your session. Please reconnect.")})
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return
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}
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c.Set("LoggedUser", user)
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c.Next()
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if session.HasChanged() {
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storage.MainStore.UpdateSession(session)
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}
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}
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}
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