wings/api/auth.go

123 lines
2.9 KiB
Go

package api
import (
"net/http"
"github.com/Pterodactyl/wings/config"
"github.com/Pterodactyl/wings/control"
"github.com/gin-gonic/gin"
log "github.com/sirupsen/logrus"
)
const (
accessTokenHeader = "X-Access-Token"
contextVarServer = "server"
contextVarAuth = "auth"
)
type responseError struct {
Error string `json:"error"`
}
// AuthorizationManager handles permission checks
type AuthorizationManager interface {
HasPermission(string) bool
}
type authorizationManager struct {
token string
server control.Server
}
var _ AuthorizationManager = &authorizationManager{}
func newAuthorizationManager(token string, server control.Server) *authorizationManager {
return &authorizationManager{
token: token,
server: server,
}
}
func (a *authorizationManager) HasPermission(permission string) bool {
if permission == "" {
return true
}
prefix := permission[:1]
if prefix == "c" {
return config.ContainsAuthKey(a.token)
}
if a.server == nil {
log.WithField("permission", permission).Error("Auth: Server required but none found.")
return false
}
if prefix == "g" {
return config.ContainsAuthKey(a.token)
}
if prefix == "s" {
return a.server.HasPermission(a.token, permission)
}
return false
}
// AuthHandler returns a HandlerFunc that checks request authentication
// permission is a permission string describing the required permission to access the route
func AuthHandler(permission string) gin.HandlerFunc {
return func(c *gin.Context) {
requestToken := c.Request.Header.Get(accessTokenHeader)
requestServer := c.Param("server")
var server control.Server
if requestToken == "" && permission != "" {
log.Debug("Token missing in request.")
c.JSON(http.StatusBadRequest, responseError{"Missing required " + accessTokenHeader + " header."})
c.Abort()
return
}
if requestServer != "" {
server = control.GetServer(requestServer)
//fmt.Println(server)
if server == nil {
log.WithField("serverUUID", requestServer).Error("Auth: Requested server not found.")
}
}
auth := newAuthorizationManager(requestToken, server)
if auth.HasPermission(permission) {
c.Set(contextVarServer, server)
c.Set(contextVarAuth, auth)
return
}
c.JSON(http.StatusForbidden, responseError{"You do not have permission to perform this action."})
c.Abort()
}
}
// GetContextAuthManager returns a AuthorizationManager contained in
// a gin.Context or nil
func GetContextAuthManager(c *gin.Context) AuthorizationManager {
auth, exists := c.Get(contextVarAuth)
if !exists {
return nil
}
if auth, ok := auth.(AuthorizationManager); ok {
return auth
}
return nil
}
// GetContextServer returns a control.Server contained in a gin.Context
// or null
func GetContextServer(c *gin.Context) control.Server {
server, exists := c.Get(contextVarAuth)
if !exists {
return nil
}
if server, ok := server.(control.Server); ok {
return server
}
return nil
}