91 lines
1.9 KiB
Go
91 lines
1.9 KiB
Go
package middleware
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import (
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"net/http"
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"strconv"
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"strings"
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"git.artlef.fr/bibliomane/internal/jwtauth"
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"github.com/gin-gonic/gin"
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"github.com/golang-jwt/jwt/v5"
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)
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func Auth() gin.HandlerFunc {
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return func(c *gin.Context) {
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//do not check current user if we are creating an account or logging in
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if strings.HasPrefix(c.FullPath(), "/ws/auth/") {
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return
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}
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//do not check appinfo
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if strings.HasPrefix(c.FullPath(), "/ws/appinfo") {
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return
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}
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//do not check static files
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if strings.HasPrefix(c.FullPath(), "/static/bookcover/") {
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return
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}
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jwtokenStr := jwtFromBearerToken(c.GetHeader("Authorization"))
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jwtoken, err := jwt.Parse(jwtokenStr,
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func(token *jwt.Token) (any, error) {
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return jwtauth.GetJwtKey()
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}, jwt.WithValidMethods([]string{jwt.SigningMethodHS256.Alg()}))
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if err != nil {
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abortError(c)
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return
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}
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//check admin rights
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if strings.HasPrefix(c.FullPath(), "/ws/admin/") && !hasAdminRights(jwtoken) {
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c.AbortWithStatusJSON(http.StatusForbidden,
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gin.H{"error": "You do not have the right to access this resource."})
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return
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}
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username, err := jwtoken.Claims.GetSubject()
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if err != nil {
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abortError(c)
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} else {
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c.Set("user", username)
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}
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}
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}
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func jwtFromBearerToken(bearerToken string) string {
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splitToken := strings.Split(bearerToken, " ")
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if len(splitToken) == 2 {
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return splitToken[1]
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} else {
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return ""
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}
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}
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func hasAdminRights(token *jwt.Token) bool {
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claims, ok := token.Claims.(jwt.MapClaims)
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if !ok {
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return false
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}
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raw, ok := claims["admin"]
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if !ok {
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return false
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}
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adminStr, ok := raw.(string)
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if !ok {
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return false
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}
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isAdmin, err := strconv.ParseBool(adminStr)
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if err != nil {
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return false
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}
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return isAdmin
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}
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func abortError(c *gin.Context) {
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c.AbortWithStatusJSON(http.StatusUnauthorized,
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gin.H{"error": "You must be logged in to access this resource."})
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}
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