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login.go
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login.go
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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* This file is part of the IoT Management Service
* Copyright 2019 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Affero General Public License version 3, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranties of MERCHANTABILITY,
* SATISFACTORY QUALITY, 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
package web
import (
"encoding/json"
"errors"
"fmt"
"html/template"
"net/http"
"github.com/everactive/iot-management/config/configkey"
"github.com/everactive/iot-management/datastore"
webusso "github.com/everactive/iot-management/web/usso"
"github.com/gin-gonic/gin"
"github.com/juju/usso"
log "github.com/sirupsen/logrus"
"github.com/spf13/viper"
)
// Account is the account structure for a USSO user based on the token
type Account struct {
Email string
Username string
DisplayName string `json:"displayname"`
}
// UbuntuSingleSignOnServer is the interface for minimal USSO functionality
type UbuntuSingleSignOnServer interface {
IsTokenValid(ssodata *usso.SSOData) (bool, error)
GetAccounts(ssodata *usso.SSOData) (string, error)
}
func (wb Service) getSSOData(context *gin.Context) (*usso.SSOData, int, error) {
// need to get body with OAuth token information
var ssodata usso.SSOData
if context.Request.Body == nil {
return nil, http.StatusBadRequest, errors.New("body of request is nil")
}
err := json.NewDecoder(context.Request.Body).Decode(&ssodata)
if err != nil {
return nil, http.StatusBadRequest, err
}
// If any of these values are empty we can't continue.
if ssodata.TokenName == "" || ssodata.TokenKey == "" || ssodata.ConsumerKey == "" || ssodata.ConsumerSecret == "" || ssodata.Realm == "" {
return nil, http.StatusBadRequest, errors.New("all values for SSOData must have values")
}
// need to validate token
valid, err2 := ssoServer.IsTokenValid(&ssodata)
if err2 != nil {
return nil, http.StatusUnauthorized, err2
}
if !valid {
return nil, http.StatusUnauthorized, errors.New("token is invalid")
}
return &ssodata, http.StatusOK, nil
}
// LoginHandlerAPIClient processes the login for API client
func (wb Service) LoginHandlerAPIClient(c *gin.Context) {
ssodata, status, err := wb.getSSOData(c)
if err != nil {
replyHTTPError(c.Writer, status, err)
return
}
accountsString, err3 := ssoServer.GetAccounts(ssodata)
if err3 != nil {
replyHTTPError(c.Writer, http.StatusUnauthorized, errors.New("unable to get accounts for token"))
return
}
var accts Account
err4 := json.Unmarshal([]byte(accountsString), &accts)
if err4 != nil {
replyHTTPError(c.Writer, http.StatusUnauthorized, errors.New("unable to get accounts for token"))
return
}
// Check that the user is registered
user, err := wb.Manage.GetUser(accts.Username)
if err != nil {
// Cannot find the user, so redirect to the login page
log.Printf("Error retrieving user from datastore: %v\n", err)
http.Redirect(c.Writer, c.Request, "/notfound", http.StatusTemporaryRedirect)
return
}
// Verify role value is valid
if user.Role != datastore.Standard && user.Role != datastore.Admin && user.Role != datastore.Superuser {
log.Printf("Role obtained from database for user %v has not a valid value: %v\n", accts.Username, user.Role)
http.Redirect(c.Writer, c.Request, "/notfound", http.StatusTemporaryRedirect)
return
}
jwtSecret := viper.GetString(configkey.JwtSecret)
// Build the JWT
jwtToken, err := webusso.NewJWTTokenForClient(jwtSecret, accts.Username, accts.DisplayName, accts.Email, ssodata.TokenKey, user.Role)
if err != nil {
// Unexpected that this should occur, so leave the detailed response
log.Printf("Error creating the JWT: %v", err)
replyHTTPError(c.Writer, http.StatusBadRequest, err)
return
}
c.Writer.Header().Set(webusso.JWTCookie, jwtToken)
}
// LoginHandler processes the login for Ubuntu SSO
func (wb Service) LoginHandler(c *gin.Context) {
// Get the openid nonce store
nonce := wb.Manage.OpenIDNonceStore()
w := c.Writer
r := c.Request
// Call the openid login handler
resp, req, username, err := webusso.LoginHandler(nonce, w, r)
if err != nil {
log.Printf("Error verifying the OpenID response: %v\n", err)
replyHTTPError(w, http.StatusBadRequest, err)
return
}
if req != nil {
// Redirect is handled by the SSO handler
return
}
// Check that the user is registered
user, err := wb.Manage.GetUser(username)
if err != nil {
// Cannot find the user, so redirect to the login page
log.Printf("Error retrieving user from datastore: %v\n", err)
http.Redirect(w, r, "/notfound", http.StatusTemporaryRedirect)
return
}
// Verify role value is valid
if user.Role != datastore.Standard && user.Role != datastore.Admin && user.Role != datastore.Superuser {
log.Printf("Role obtained from database for user %v has not a valid value: %v\n", username, user.Role)
http.Redirect(w, r, "/notfound", http.StatusTemporaryRedirect)
return
}
jwtSecret := viper.GetString(configkey.JwtSecret)
// Build the JWT
jwtToken, err := webusso.NewJWTToken(jwtSecret, resp, user.Role)
if err != nil {
// Unexpected that this should occur, so leave the detailed response
log.Printf("Error creating the JWT: %v", err)
replyHTTPError(w, http.StatusBadRequest, err)
return
}
// Set a cookie with the JWT
webusso.AddJWTCookie(jwtToken, w)
frontendHost := viper.GetString(configkey.FrontEndHost)
frontendScheme := viper.GetString(configkey.FrontEndScheme)
// Both values have to exist and have values for the alternate redirect
if frontendScheme != "" && frontendHost != "" {
// Redirect to the homepage with the JWT
http.Redirect(w, r, fmt.Sprintf("%s://%s/", frontendScheme, frontendHost), http.StatusTemporaryRedirect)
} else {
// Redirect to the homepage with the JWT
http.Redirect(w, r, "/", http.StatusTemporaryRedirect)
}
}
// LogoutHandler logs the user out by removing the cookie and the JWT authorization header
func (wb Service) LogoutHandler(c *gin.Context) {
webusso.LogoutHandler(c.Writer, c.Request)
}
func replyHTTPError(w http.ResponseWriter, returnCode int, err error) {
w.Header().Set("ContentType", "text/html")
w.WriteHeader(returnCode)
err = errorTemplate.Execute(w, err)
if err != nil {
log.Error(err)
}
}
var errorTemplate = template.Must(template.New("failure").Parse(`<html>
<head><title>Login Error</title></head>
<body>{{.}}</body>
</html>
`))