mirror of
https://github.com/hrfee/jfa-go.git
synced 2024-10-31 23:40:11 +00:00
229 lines
7.0 KiB
Go
229 lines
7.0 KiB
Go
package main
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import (
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"encoding/base64"
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"fmt"
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"os"
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"strconv"
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"strings"
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"time"
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"github.com/dgrijalva/jwt-go"
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"github.com/gin-gonic/gin"
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"github.com/lithammer/shortuuid/v3"
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)
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func (app *appContext) webAuth() gin.HandlerFunc {
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return app.authenticate
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}
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// CreateToken returns a web token as well as a refresh token, which can be used to obtain new tokens.
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func CreateToken(userId, jfId string) (string, string, error) {
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var token, refresh string
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claims := jwt.MapClaims{
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"valid": true,
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"id": userId,
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"exp": strconv.FormatInt(time.Now().Add(time.Minute*20).Unix(), 10),
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"jfid": jfId,
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"type": "bearer",
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}
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tk := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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token, err := tk.SignedString([]byte(os.Getenv("JFA_SECRET")))
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if err != nil {
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return "", "", err
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}
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claims["exp"] = strconv.FormatInt(time.Now().Add(time.Hour*24).Unix(), 10)
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claims["type"] = "refresh"
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tk = jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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refresh, err = tk.SignedString([]byte(os.Getenv("JFA_SECRET")))
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if err != nil {
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return "", "", err
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}
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return token, refresh, nil
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}
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// Check header for token
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func (app *appContext) authenticate(gc *gin.Context) {
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header := strings.SplitN(gc.Request.Header.Get("Authorization"), " ", 2)
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if header[0] != "Bearer" {
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app.debug.Println("Invalid authorization header")
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respond(401, "Unauthorized", gc)
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return
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}
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token, err := jwt.Parse(string(header[1]), checkToken)
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if err != nil {
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app.debug.Printf("Auth denied: %s", err)
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respond(401, "Unauthorized", gc)
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return
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}
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claims, ok := token.Claims.(jwt.MapClaims)
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expiryUnix, err := strconv.ParseInt(claims["exp"].(string), 10, 64)
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if err != nil {
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app.debug.Printf("Auth denied: %s", err)
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respond(401, "Unauthorized", gc)
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return
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}
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expiry := time.Unix(expiryUnix, 0)
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if !(ok && token.Valid && claims["type"].(string) == "bearer" && expiry.After(time.Now())) {
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app.debug.Printf("Auth denied: Invalid token")
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respond(401, "Unauthorized", gc)
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return
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}
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userID := claims["id"].(string)
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jfID := claims["jfid"].(string)
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match := false
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for _, user := range app.users {
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if user.UserID == userID {
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match = true
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break
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}
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}
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if !match {
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app.debug.Printf("Couldn't find user ID \"%s\"", userID)
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respond(401, "Unauthorized", gc)
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return
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}
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gc.Set("jfId", jfID)
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gc.Set("userId", userID)
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app.debug.Println("Auth succeeded")
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gc.Next()
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}
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func checkToken(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(os.Getenv("JFA_SECRET")), nil
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}
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type getTokenDTO struct {
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Token string `json:"token" example:"kjsdklsfdkljfsjsdfklsdfkldsfjdfskjsdfjklsdf"` // API token for use with everything else.
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}
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// @Summary Grabs an API token using username & password.
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// @description Click the lock icon next to this, login with your normal jfa-go credentials. Click 'try it out', then 'execute' and an API Key will be returned, copy it (not including quotes). On any of the other routes, click the lock icon and set the API key as "Bearer `your api key`".
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// @Produce json
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// @Success 200 {object} getTokenDTO
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// @Failure 401 {object} stringResponse
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// @Router /token/login [get]
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// @tags Auth
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// @Security getTokenAuth
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func (app *appContext) getTokenLogin(gc *gin.Context) {
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app.info.Println("Token requested (login attempt)")
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header := strings.SplitN(gc.Request.Header.Get("Authorization"), " ", 2)
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auth, _ := base64.StdEncoding.DecodeString(header[1])
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creds := strings.SplitN(string(auth), ":", 2)
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var userID, jfID string
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if creds[0] == "" || creds[1] == "" {
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app.debug.Println("Auth denied: blank username/password")
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respond(401, "Unauthorized", gc)
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return
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}
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match := false
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for _, user := range app.users {
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if user.Username == creds[0] && user.Password == creds[1] {
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match = true
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app.debug.Println("Found existing user")
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userID = user.UserID
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break
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}
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}
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if !app.jellyfinLogin && !match {
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app.info.Println("Auth denied: Invalid username/password")
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respond(401, "Unauthorized", gc)
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return
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}
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if !match {
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var status int
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var err error
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var user map[string]interface{}
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user, status, err = app.authJf.Authenticate(creds[0], creds[1])
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if status != 200 || err != nil {
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if status == 401 || status == 400 {
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app.info.Println("Auth denied: Invalid username/password (Jellyfin)")
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respond(401, "Unauthorized", gc)
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return
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}
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app.err.Printf("Auth failed: Couldn't authenticate with Jellyfin (%d/%s)", status, err)
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respond(500, "Jellyfin error", gc)
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return
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}
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jfID = user["Id"].(string)
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if app.config.Section("ui").Key("admin_only").MustBool(true) {
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if !user["Policy"].(map[string]interface{})["IsAdministrator"].(bool) {
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app.debug.Printf("Auth denied: Users \"%s\" isn't admin", creds[0])
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respond(401, "Unauthorized", gc)
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return
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}
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}
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// New users are only added when using jellyfinLogin.
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userID = shortuuid.New()
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newUser := User{
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UserID: userID,
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}
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app.debug.Printf("Token generated for user \"%s\"", creds[0])
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app.users = append(app.users, newUser)
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}
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token, refresh, err := CreateToken(userID, jfID)
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if err != nil {
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app.err.Printf("getToken failed: Couldn't generate token (%s)", err)
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respond(500, "Couldn't generate token", gc)
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return
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}
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gc.SetCookie("refresh", refresh, (3600 * 24), "/", gc.Request.URL.Hostname(), true, true)
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gc.JSON(200, getTokenDTO{token})
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}
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// @Summary Grabs an API token using a refresh token from cookies.
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// @Produce json
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// @Success 200 {object} getTokenDTO
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// @Failure 401 {object} stringResponse
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// @Router /token/refresh [get]
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// @tags Auth
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func (app *appContext) getTokenRefresh(gc *gin.Context) {
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app.debug.Println("Token requested (refresh token)")
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cookie, err := gc.Cookie("refresh")
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if err != nil || cookie == "" {
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app.debug.Printf("getTokenRefresh denied: Couldn't get token: %s", err)
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respond(400, "Couldn't get token", gc)
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return
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}
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for _, token := range app.invalidTokens {
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if cookie == token {
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app.debug.Println("getTokenRefresh: Invalid token")
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respond(401, "Invalid token", gc)
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return
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}
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}
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token, err := jwt.Parse(cookie, checkToken)
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if err != nil {
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app.debug.Println("getTokenRefresh: Invalid token")
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respond(400, "Invalid token", gc)
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return
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}
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claims, ok := token.Claims.(jwt.MapClaims)
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expiryUnix, err := strconv.ParseInt(claims["exp"].(string), 10, 64)
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if err != nil {
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app.debug.Printf("getTokenRefresh: Invalid token expiry: %s", err)
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respond(401, "Invalid token", gc)
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return
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}
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expiry := time.Unix(expiryUnix, 0)
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if !(ok && token.Valid && claims["type"].(string) == "refresh" && expiry.After(time.Now())) {
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app.debug.Printf("getTokenRefresh: Invalid token: %s", err)
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respond(401, "Invalid token", gc)
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return
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}
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userID := claims["id"].(string)
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jfID := claims["jfid"].(string)
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jwt, refresh, err := CreateToken(userID, jfID)
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if err != nil {
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app.err.Printf("getTokenRefresh failed: Couldn't generate token (%s)", err)
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respond(500, "Couldn't generate token", gc)
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return
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}
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gc.SetCookie("refresh", refresh, (3600 * 24), "/", gc.Request.URL.Hostname(), true, true)
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gc.JSON(200, getTokenDTO{jwt})
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}
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