fix(contact): keep the contact email editable and protect it from scrapers
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An earlier change rejected obfuscated entries such as
"info [á] wabenhain.com" in Admin -> Inhalte and replaced them with the
default address. The obfuscation was intentional, so:
- The admin accepts the entry as written (plain or obfuscated with
[at], (at), {ät}, [á], <@>, [dot], [punkt]) and stores it unchanged;
only entries that yield no valid address are rejected.
- lib/contact-email.ts turns the entry into the real address for
mailto links and DHL labels.
- Public pages never contain the address in clear text: footer,
contact page and every email in legal texts (Impressum, Datenschutz,
Widerruf) render "info [at] wabenhain.com" plus an XOR-encoded payload
with a fresh random key; the browser builds the clickable mailto link
after load (components/protected-email.tsx).
Verified with a production build: the raw HTML of /, /kontakt,
/impressum, /datenschutz and /widerrufsbelehrung contains no plain
address, and after load each page shows mailto:[email protected].
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
This commit is contained in:
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@@ -7,7 +7,7 @@ import { CONTENT_REGISTRY } from "@/lib/content-registry";
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import { isValidUploadPath, isValidVideoUploadPath } from "@/lib/uploads";
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import { requireAdmin } from "./_shared";
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import { fail, succeed } from "@/lib/flash";
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import { z } from "zod";
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import { normalizeContactEmail } from "@/lib/contact-email";
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const COMPANY_EMAIL_KEY = "company.email";
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@@ -51,13 +51,17 @@ export async function updateSiteContentAction(formData: FormData): Promise<void>
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if (def.type === "video" && valueDe !== "" && !isValidVideoUploadPath(valueDe)) {
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continue;
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}
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// Die Firmen-E-Mail steht im Impressum (§ 5 Abs. 1 Nr. 2 DDG verlangt
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// eine direkt nutzbare Adresse), in der Widerrufsbelehrung und in
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// mailto-Links. Eine verschleierte Schreibweise ("info [at] …") waere
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// dort rechtlich angreifbar und technisch unbrauchbar — daher wird der
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// ganze Speichervorgang abgelehnt statt still uebernommen.
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if (def.key === COMPANY_EMAIL_KEY && !z.string().trim().email().safeParse(valueDe).success) {
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return fail("/admin/inhalte", "Bitte gib als Firmen-E-Mail eine vollständige, gültige Adresse an (z. B. [email protected]). Sie steht im Impressum und muss direkt nutzbar sein.");
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// Die Firmen-E-Mail darf so eingetragen werden, wie sie gemeint ist —
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// auch verschleiert ("info [at] …", "info [á] …"). Gespeichert wird der
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// Eintrag unveraendert; die Website rechnet ihn in die echte Adresse um
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// und zeigt sie geschuetzt an (lib/contact-email.ts). Abgelehnt wird nur,
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// was sich in keine gueltige Adresse umrechnen laesst — sonst stuende im
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// Impressum ein Kontaktweg, der ins Leere fuehrt.
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if (def.key === COMPANY_EMAIL_KEY && normalizeContactEmail(valueDe) === null) {
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return fail(
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"/admin/inhalte",
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"Die Firmen-E-Mail ergibt keine gültige Adresse. Möglich sind z. B. [email protected], info [at] wabenhain.com oder info [á] wabenhain.com."
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);
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}
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updates.push({ key: def.key, valueDe: def.key === COMPANY_EMAIL_KEY ? valueDe.trim() : valueDe, valueEn: null });
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}
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+20
-16
@@ -3,6 +3,7 @@ import { Container, SectionHeading } from "@/components/ui";
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import { HoneycombPattern, HexMark } from "@/components/honeycomb";
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import { ScrollReveal } from "@/components/scroll-reveal";
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import { getCompanyInfo } from "@/lib/company-info";
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import { ContactEmail } from "@/components/contact-email";
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import { getLocale } from "@/i18n/locale";
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import { getDictionary } from "@/i18n/get-dictionary";
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@@ -32,22 +33,25 @@ export default async function KontaktPage() {
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<div className="relative h-full overflow-hidden bg-forest px-8 py-10 text-cream md:px-10">
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<HoneycombPattern className="text-honey-light/[0.1]" size={24} fade="right" />
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<div className="relative">
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<a
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href={`mailto:${company.email}`}
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className="group inline-flex items-center gap-3 font-serif text-2xl sm:text-3xl md:text-4xl text-cream"
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>
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<span className="link-draw pb-1">{company.email}</span>
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<svg
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aria-hidden="true"
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viewBox="0 0 24 24"
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className="h-5 w-5 text-honey-light transition-transform duration-300 ease-[var(--ease-arrive)] group-hover:translate-x-1"
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fill="none"
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stroke="currentColor"
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strokeWidth="1.6"
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>
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<path d="M4 12h15M13 6l6 6-6 6" strokeLinecap="round" strokeLinejoin="round" />
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</svg>
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</a>
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{/* Vor Adress-Sammlern geschuetzt: im HTML steht nur
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"info [at] …", den mailto-Link baut erst der Browser. */}
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<ContactEmail
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email={company.email}
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linkClassName="group inline-flex max-w-full items-center gap-3 break-all font-serif text-2xl sm:text-3xl md:text-4xl text-cream"
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textClassName="link-draw pb-1"
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trailing={
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<svg
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aria-hidden="true"
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viewBox="0 0 24 24"
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className="h-5 w-5 shrink-0 text-honey-light transition-transform duration-300 ease-[var(--ease-arrive)] group-hover:translate-x-1"
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fill="none"
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stroke="currentColor"
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strokeWidth="1.6"
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>
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<path d="M4 12h15M13 6l6 6-6 6" strokeLinecap="round" strokeLinejoin="round" />
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</svg>
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}
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/>
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{/* Ohne gepflegte Nummer entfaellt die Zeile ganz. Eine
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Platzhalternummer waere schlimmer als keine: sie sieht nach
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einem Kontaktweg aus, an dessen Ende niemand abnimmt. */}
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@@ -0,0 +1,24 @@
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import type { ReactNode } from "react";
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import { protectEmail } from "@/lib/contact-email";
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import { ProtectedEmail } from "@/components/protected-email";
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/**
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* Serverseitiger Einstieg fuer jede oeffentlich angezeigte Kontakt-E-Mail:
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* verschluesselt die Adresse und uebergibt nur Ersatzform + Schluesseltext an
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* den Browser — die Klartext-Adresse landet weder im HTML noch in den an den
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* Client uebertragenen Daten. Siehe lib/contact-email.ts.
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*/
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export function ContactEmail({
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email,
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linkClassName,
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textClassName,
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trailing,
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}: {
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email: string;
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linkClassName?: string;
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textClassName?: string;
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trailing?: ReactNode;
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}) {
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const { payload, fallback } = protectEmail(email);
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return <ProtectedEmail payload={payload} fallback={fallback} linkClassName={linkClassName} textClassName={textClassName} trailing={trailing} />;
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}
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@@ -3,6 +3,7 @@ import { Container } from "@/components/ui";
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import { HexMark, HoneycombPattern } from "@/components/honeycomb";
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import { LegalToc } from "@/components/legal-toc";
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import { ReadingProgress } from "@/components/reading-progress";
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import { ContactEmail } from "@/components/contact-email";
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import { extractRevision, parseLegalParagraph, sectionAnchors, tokenizeInline, type LegalBlock } from "@/lib/legal-blocks";
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import { getLocale } from "@/i18n/locale";
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import { getDictionary } from "@/i18n/get-dictionary";
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@@ -192,14 +193,20 @@ function Entry({ entry }: { entry: Extract<LegalBlock, { kind: "entry" }> }) {
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);
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}
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const LINK_CLASS = "text-heading underline decoration-honey/60 decoration-1 underline-offset-[0.22em] transition-colors hover:decoration-honey";
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function Inline({ text }: { text: string }) {
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return tokenizeInline(text).map((token, i) =>
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token.kind === "link" ? (
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// E-Mail-Adressen (Impressum, Datenschutz, Widerruf) nie im Klartext ins
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// HTML — Schutz vor Adress-Sammlern, siehe lib/contact-email.ts.
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token.kind === "link" && token.href.startsWith("mailto:") ? (
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<ContactEmail key={i} email={token.value} linkClassName={LINK_CLASS} />
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) : token.kind === "link" ? (
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<a
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key={i}
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href={token.href}
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{...(token.href.startsWith("http") ? { target: "_blank", rel: "noopener noreferrer" } : {})}
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className="text-heading underline decoration-honey/60 decoration-1 underline-offset-[0.22em] transition-colors hover:decoration-honey"
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className={LINK_CLASS}
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>
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{token.value}
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</a>
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@@ -0,0 +1,47 @@
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"use client";
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import { useEffect, useState, type ReactNode } from "react";
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import { decodeEmailPayload } from "@/lib/contact-email";
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export interface ProtectedEmailProps {
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/** Verschluesselte Adresse aus protectEmail() (lib/contact-email.ts). */
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payload: string;
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/** Lesbare Ersatzform ("info [at] wabenhain.com") fuer HTML und Besucher ohne JavaScript. */
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fallback: string;
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linkClassName?: string;
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textClassName?: string;
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/** Zusatz hinter dem Text im Link, z. B. ein Pfeil-Icon. */
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trailing?: ReactNode;
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}
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/**
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* Zeigt eine E-Mail-Adresse, die im ausgelieferten HTML nicht im Klartext
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* steht: Server-HTML und erster Render zeigen nur die Ersatzform, erst nach
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* dem Laden im Browser entsteht der echte mailto-Link.
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*/
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export function ProtectedEmail({ payload, fallback, linkClassName, textClassName, trailing }: ProtectedEmailProps) {
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const [email, setEmail] = useState<string | null>(null);
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useEffect(() => {
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// Bewusst erst nach dem Mount: im Server-HTML (das Crawler lesen) soll die
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// Adresse gerade NICHT stehen, und ein abweichender erster Render wuerde
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// einen Hydration-Fehler ausloesen.
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// eslint-disable-next-line react-hooks/set-state-in-effect -- Entschluesseln ist ein reiner Browser-Schritt nach dem Mount
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setEmail(decodeEmailPayload(payload));
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}, [payload]);
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if (!email) {
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return (
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<span className={linkClassName}>
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<span className={textClassName}>{fallback}</span>
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{trailing}
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</span>
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);
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}
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return (
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<a href={`mailto:${email}`} className={linkClassName}>
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<span className={textClassName}>{email}</span>
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{trailing}
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</a>
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);
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}
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@@ -3,6 +3,7 @@ import { HoneycombPattern } from "@/components/honeycomb";
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import type { ReactNode } from "react";
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import { Container, LinkButton } from "@/components/ui";
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import { Logomark } from "@/components/logomark";
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import { ContactEmail } from "@/components/contact-email";
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import { footerNav } from "@/lib/site-config";
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import type { SocialLinks } from "@/lib/social-links";
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import { getDictionary } from "@/i18n/get-dictionary";
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@@ -137,7 +138,7 @@ export async function Footer({
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<br />
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{companyInfo.address.zip} {companyInfo.address.city}
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<br />
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{companyInfo.email}
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<ContactEmail email={companyInfo.email} linkClassName="transition-colors hover:text-cream" />
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</p>
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{/* Elektronische Widerrufsfunktion (§ 356a BGB): auf jeder Seite
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erreichbar und hervorgehoben — deshalb ein eigener Knopf statt
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@@ -1,9 +1,7 @@
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import { cache } from "react";
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import { siteConfig } from "@/lib/site-config";
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import { getContentValues } from "@/lib/content";
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/** Bewusst schlicht: nur "[email protected]" ohne Leerzeichen — faengt Verschleierungen wie "info [at] x.de" ab. */
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const EMAIL_PATTERN = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
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import { normalizeContactEmail } from "@/lib/contact-email";
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const COMPANY_KEYS = [
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"company.name",
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@@ -49,11 +47,12 @@ export const getCompanyInfo = cache(async () => {
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claimAlt: v["company.claimAlt"],
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description: v["company.description"],
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location: v["company.location"],
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// Altbestand kann eine verschleierte Adresse enthalten ("info [at] …"),
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// die das Admin inzwischen ablehnt. Im Impressum und in der
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// Widerrufsbelehrung muss sie direkt nutzbar sein — dann lieber die
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// konfigurierte Standardadresse als eine unbrauchbare.
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email: EMAIL_PATTERN.test(v["company.email"].trim()) ? v["company.email"].trim() : siteConfig.email,
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// Im Admin darf die Adresse verschleiert gepflegt werden ("info [at] …").
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// Hier wird sie in die echte Adresse umgerechnet — fuer mailto-Links,
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// DHL-Etiketten und die geschuetzte Anzeige (components/contact-email.tsx).
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// Die Standardadresse greift nur, wenn der Eintrag gar keine Adresse
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// ergibt; das Admin laesst solche Eintraege nicht mehr speichern.
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email: normalizeContactEmail(v["company.email"]) ?? siteConfig.email,
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phone: v["company.phone"],
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address: {
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...siteConfig.address,
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@@ -0,0 +1,56 @@
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import { describe, expect, it } from "vitest";
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import { decodeEmailPayload, displayEmail, encodeEmailPayload, normalizeContactEmail, protectEmail } from "./contact-email";
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describe("normalizeContactEmail", () => {
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it.each([
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["[email protected]", "[email protected]"],
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[" [email protected] ", "[email protected]"],
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["info [á] wabenhain.com", "[email protected]"],
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["info [at] wabenhain.com", "[email protected]"],
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["info(at)wabenhain(dot)com", "[email protected]"],
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["info {ät} wabenhain [punkt] com", "[email protected]"],
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["info [AT] wabenhain [DOT] com", "[email protected]"],
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["hallo<@>wabenhain.com", "[email protected]"],
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])("turns %j into a usable address", (input, expected) => {
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expect(normalizeContactEmail(input)).toBe(expected);
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});
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it.each(["", "hallo", "info [á] ", "info @ wabenhain", "a@[email protected]", "info [á] wabenhain.com <script>"])("rejects %j", (input) => {
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expect(normalizeContactEmail(input)).toBeNull();
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});
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});
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describe("displayEmail", () => {
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it("shows a readable, not directly harvestable form", () => {
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expect(displayEmail("[email protected]")).toBe("info [at] wabenhain.com");
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});
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});
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describe("email payload", () => {
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it("round-trips and never contains the address in clear text", () => {
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const payload = encodeEmailPayload("[email protected]", new Uint8Array([7, 42, 199, 3]));
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expect(payload).not.toContain("@");
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expect(payload).not.toContain("wabenhain");
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expect(payload).not.toContain("info");
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expect(decodeEmailPayload(payload)).toBe("[email protected]");
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});
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it("supports non-ASCII addresses", () => {
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const payload = encodeEmailPayload("jü[email protected]", new Uint8Array([1, 2, 3]));
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expect(decodeEmailPayload(payload)).toBe("jü[email protected]");
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});
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it("returns null for damaged payloads", () => {
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expect(decodeEmailPayload("kaputt")).toBeNull();
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expect(decodeEmailPayload("0102.zz")).toBeNull();
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expect(decodeEmailPayload("")).toBeNull();
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});
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it("uses a fresh key per call", () => {
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const a = protectEmail("[email protected]");
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const b = protectEmail("[email protected]");
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expect(a.payload).not.toBe(b.payload);
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expect(decodeEmailPayload(a.payload)).toBe("[email protected]");
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expect(a.fallback).toBe("info [at] wabenhain.com");
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});
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});
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@@ -0,0 +1,74 @@
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/**
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* Kontakt-E-Mail: im Admin frei pflegbar (auch in verschleierter Form wie
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* "info [at] wabenhain.com") und auf der Website vor Adress-Sammlern
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* geschuetzt.
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*
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* Schutzprinzip: Im ausgelieferten HTML steht die Adresse nie im Klartext —
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* nur die lesbare Ersatzform ("info [at] wabenhain.com") und eine
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* XOR-verschluesselte Zeichenkette mit zufaelligem Schluessel je Aufruf. Erst
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* der Browser setzt daraus den mailto-Link zusammen
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* (components/protected-email.tsx). Einfache Crawler, die nur HTML lesen,
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* finden damit keine Adresse; wer JavaScript ausfuehrt, kann sie — wie jeder
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* Besucher — trotzdem lesen. Vollstaendigen Schutz gibt es fuer eine
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* oeffentlich angezeigte Adresse nicht.
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*
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* Bewusst ohne node:crypto — das Modul wird auch im Browser (Entschluesseln)
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* geladen.
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*/
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const AT_TOKEN = /\s*[[({<]\s*(?:at|á|ä|ät|@)\s*[\])}>]\s*/gi;
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const DOT_TOKEN = /\s*[[({<]\s*(?:dot|punkt|\.)\s*[\])}>]\s*/gi;
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const EMAIL = /^[^\s@<>"'()[\]{}]+@[^\s@<>"'()[\]{}]+\.[^\s@<>"'()[\]{}]+$/;
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const KEY_BYTES = 8;
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/**
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* Macht aus dem Admin-Eintrag eine verwendbare Adresse. Versteht die
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* ueblichen Verschleierungen ([at], (at), {ät}, [á], <@>, [dot], [punkt]).
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* null, wenn danach keine gueltige Adresse uebrig bleibt.
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*/
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export function normalizeContactEmail(raw: string): string | null {
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const email = raw.trim().replace(AT_TOKEN, "@").replace(DOT_TOKEN, ".");
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return EMAIL.test(email) ? email : null;
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}
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/** Lesbare Ersatzform fuer die Anzeige ohne JavaScript: "info [at] wabenhain.com". */
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export function displayEmail(email: string): string {
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return email.replace("@", " [at] ");
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}
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function toHex(bytes: Uint8Array): string {
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return Array.from(bytes, (b) => b.toString(16).padStart(2, "0")).join("");
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}
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function fromHex(hex: string): Uint8Array | null {
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if (hex.length === 0 || hex.length % 2 !== 0 || !/^[0-9a-f]+$/.test(hex)) return null;
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const bytes = new Uint8Array(hex.length / 2);
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for (let i = 0; i < bytes.length; i++) bytes[i] = parseInt(hex.slice(i * 2, i * 2 + 2), 16);
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return bytes;
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}
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function xor(data: Uint8Array, key: Uint8Array): Uint8Array {
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return data.map((byte, i) => byte ^ key[i % key.length]);
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}
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export function encodeEmailPayload(email: string, key: Uint8Array): string {
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return `${toHex(key)}.${toHex(xor(new TextEncoder().encode(email), key))}`;
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||||
}
|
||||
|
||||
export function decodeEmailPayload(payload: string): string | null {
|
||||
const [keyHex, dataHex] = payload.split(".");
|
||||
const key = fromHex(keyHex ?? "");
|
||||
const data = fromHex(dataHex ?? "");
|
||||
if (!key || !data) return null;
|
||||
try {
|
||||
return new TextDecoder("utf-8", { fatal: true }).decode(xor(data, key));
|
||||
} catch {
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
/** Serverseitig: Ersatzanzeige + verschluesselte Adresse fuer components/protected-email.tsx. */
|
||||
export function protectEmail(email: string): { payload: string; fallback: string } {
|
||||
const key = globalThis.crypto.getRandomValues(new Uint8Array(KEY_BYTES));
|
||||
return { payload: encodeEmailPayload(email, key), fallback: displayEmail(email) };
|
||||
}
|
||||
Reference in new issue
Block a user