109 lines
2.3 KiB
Go
109 lines
2.3 KiB
Go
package middleware
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import (
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"context"
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"crypto/ed25519"
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"fmt"
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"git.lumeweb.com/LumeWeb/portal/account"
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"github.com/golang-jwt/jwt/v5"
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"net/http"
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"strings"
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)
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const (
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S5AuthUserIDKey = "userID"
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S5AuthCookieName = "s5-auth-token"
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S5AuthQueryParam = "auth_token"
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)
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func FindAuthToken(r *http.Request) string {
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authHeader := ParseAuthTokenHeader(r.Header)
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if authHeader != "" {
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return authHeader
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}
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for _, cookie := range r.Cookies() {
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if cookie.Name == S5AuthCookieName {
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return cookie.Value
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}
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}
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return r.FormValue(S5AuthQueryParam)
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}
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func ParseAuthTokenHeader(headers http.Header) string {
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authHeader := headers.Get("Authorization")
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if authHeader == "" {
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return ""
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}
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authHeader = strings.TrimPrefix(authHeader, "Bearer ")
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return authHeader
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}
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func AuthMiddleware(identity ed25519.PrivateKey, accounts *account.AccountServiceImpl) func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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authToken := FindAuthToken(r)
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if authToken == "" {
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http.Error(w, "Invalid JWT", http.StatusUnauthorized)
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return
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}
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token, err := jwt.Parse(authToken, func(token *jwt.Token) (interface{}, error) {
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if _, ok := token.Method.(*jwt.SigningMethodEd25519); !ok {
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return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
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}
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publicKey := identity.Public()
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return publicKey, nil
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})
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if err != nil {
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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if claim, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
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subject, ok := claim["sub"]
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if !ok {
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http.Error(w, "Invalid User ID", http.StatusBadRequest)
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return
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}
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var userID uint64
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switch v := subject.(type) {
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case uint64:
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userID = v
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case float64:
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userID = uint64(v)
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default:
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// Handle the case where userID is of an unexpected type
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http.Error(w, "Invalid User ID", http.StatusBadRequest)
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return
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}
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exists, _ := accounts.AccountExists(userID)
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if !exists {
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http.Error(w, "Invalid User ID", http.StatusBadRequest)
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return
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}
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ctx := context.WithValue(r.Context(), S5AuthUserIDKey, userID)
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r = r.WithContext(ctx)
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next.ServeHTTP(w, r)
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} else {
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http.Error(w, "Invalid JWT", http.StatusUnauthorized)
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}
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})
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}
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}
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