mirror of
https://github.com/TecharoHQ/anubis.git
synced 2026-04-13 03:58:45 +00:00
def6f2dc90
Previously Anubis constructed challenge strings from request metadata. This was a good idea in spirit, but has turned out to be a very bad idea in practice. This new flow reuses the Store facility to dynamically create challenge values with completely random data. This is a fairly big rewrite of how Anubis processes challenges. Right now it defaults to using the in-memory storage backend, but on-disk (boltdb) and valkey-based adaptors will come soon. Signed-off-by: Xe Iaso <me@xeiaso.net>
56 lines
1.6 KiB
Go
56 lines
1.6 KiB
Go
package metarefresh
|
|
|
|
import (
|
|
"crypto/subtle"
|
|
"fmt"
|
|
"log/slog"
|
|
"net/http"
|
|
|
|
"github.com/TecharoHQ/anubis"
|
|
"github.com/TecharoHQ/anubis/lib/challenge"
|
|
"github.com/TecharoHQ/anubis/lib/localization"
|
|
"github.com/TecharoHQ/anubis/web"
|
|
"github.com/a-h/templ"
|
|
)
|
|
|
|
//go:generate go tool github.com/a-h/templ/cmd/templ generate
|
|
|
|
func init() {
|
|
challenge.Register("metarefresh", &Impl{})
|
|
}
|
|
|
|
type Impl struct{}
|
|
|
|
func (i *Impl) Setup(mux *http.ServeMux) {}
|
|
|
|
func (i *Impl) Issue(r *http.Request, lg *slog.Logger, in *challenge.IssueInput) (templ.Component, error) {
|
|
u, err := r.URL.Parse(anubis.BasePrefix + "/.within.website/x/cmd/anubis/api/pass-challenge")
|
|
if err != nil {
|
|
return nil, fmt.Errorf("can't render page: %w", err)
|
|
}
|
|
|
|
q := u.Query()
|
|
q.Set("redir", r.URL.String())
|
|
q.Set("challenge", in.Challenge.RandomData)
|
|
u.RawQuery = q.Encode()
|
|
|
|
loc := localization.GetLocalizer(r)
|
|
component, err := web.BaseWithChallengeAndOGTags(loc.T("making_sure_not_bot"), page(u.String(), in.Rule.Challenge.Difficulty, loc), in.Impressum, in.Challenge.RandomData, in.Rule.Challenge, in.OGTags, loc)
|
|
|
|
if err != nil {
|
|
return nil, fmt.Errorf("can't render page: %w", err)
|
|
}
|
|
|
|
return component, nil
|
|
}
|
|
|
|
func (i *Impl) Validate(r *http.Request, lg *slog.Logger, in *challenge.ValidateInput) error {
|
|
gotChallenge := r.FormValue("challenge")
|
|
|
|
if subtle.ConstantTimeCompare([]byte(in.Challenge.RandomData), []byte(gotChallenge)) != 1 {
|
|
return challenge.NewError("validate", "invalid response", fmt.Errorf("%w: wanted response %s but got %s", challenge.ErrFailed, in.Challenge.RandomData, gotChallenge))
|
|
}
|
|
|
|
return nil
|
|
}
|