74 lines
2 KiB
Go
74 lines
2 KiB
Go
package middleware
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import (
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"context"
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"net/http"
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"git.elisiei.xyz/elisiei/dbots/internal/db"
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"git.elisiei.xyz/elisiei/dbots/internal/errorutil"
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"git.elisiei.xyz/elisiei/dbots/internal/token"
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"github.com/go-chi/render"
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)
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type contextKey string
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var UserContextKey contextKey = "user"
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// AuthMiddleware reads the PASETO session cookie, verifies it, checks it
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// hasn't been revoked in the db, then sets the *db.User on the context.
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// does not block unauthenticated requests
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func AuthMiddleware(q *db.Queries, pasetoKeyHex string) func(http.Handler) http.Handler {
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key, err := token.KeyFromHex(pasetoKeyHex)
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if err != nil {
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panic("middleware: invalid PASETO key: " + err.Error())
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}
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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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c, err := r.Cookie("session")
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if err != nil {
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next.ServeHTTP(w, r)
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return
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}
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claims, err := token.VerifyToken(key, c.Value)
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if err != nil {
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http.SetCookie(w, &http.Cookie{Name: "session", MaxAge: -1, Path: "/"})
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next.ServeHTTP(w, r)
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return
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}
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if _, err := q.GetSession(r.Context(), claims.JTI); err != nil {
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http.SetCookie(w, &http.Cookie{Name: "session", MaxAge: -1, Path: "/"})
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next.ServeHTTP(w, r)
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return
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}
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user, err := q.GetUser(r.Context(), claims.UserID)
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if err != nil {
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next.ServeHTTP(w, r)
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return
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}
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ctx := context.WithValue(r.Context(), UserContextKey, user)
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next.ServeHTTP(w, r.WithContext(ctx))
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})
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}
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}
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// AuthGuardMiddleware blocks requests where no authenticated user was set.
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func AuthGuardMiddleware(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if _, ok := r.Context().Value(UserContextKey).(*db.User); !ok {
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render.Render(w, r, errorutil.ErrUnauthorized)
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return
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}
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next.ServeHTTP(w, r)
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})
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}
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// GetUser returns the authenticated user from context.
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// Only safe to call inside a route guarded by AuthGuardMiddleware.
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func GetUser(ctx context.Context) *db.User {
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return ctx.Value(UserContextKey).(*db.User)
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}
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