{"id":172755,"date":"2026-05-19T18:24:53","date_gmt":"2026-05-19T16:24:53","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/ad-nihilum-0-4-3"},"modified":"2026-05-19T18:24:53","modified_gmt":"2026-05-19T16:24:53","slug":"ad-nihilum-0-4-3","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/ad-nihilum-0-4-3","title":{"rendered":"Ad Nihilum 0.4.3","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ad Nihilum 0.4.3 er blevet udgivet - en minimalistisk service til udveksling af krypterede beskeder baseret p\u00e5 princippet om \"l\u00e6st - br\u00e6ndt\", der prim\u00e6rt er rettet mod self-hosting.<\/p>\n<p>Serveren fungerer kun som en blind opbevaringsenhed. Kryptering og dekryptering sker udelukkende p\u00e5 klientsiden, i browseren (via AES-GCM).<\/p>\n<h3>Funktioner<\/h3>\n<ul>\n<li>lokal kryptering og dekryptering, <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/server\/\"   title=\"server\" data-wpil-keyword-link=\"linked\">server<\/a> ser aldrig n\u00f8glen;<\/li>\n<li>underst\u00f8ttelse af et ekstra lag kryptering med en adgangskode, som (1) serveren ikke kan f\u00e5 kendskab til, (2) ikke kan udledes af den overf\u00f8rte link;<\/li>\n<li>projektet indeholder omkring 2200 linjer serverkode i C og 600 linjer klientkode i JS, hvilket forenkler revision;<\/li>\n<li>Ad Nihilum afh\u00e6nger kun af libmicrohttpd. En modificeret version af QRCode.js leveres til generation af QR-koder;<\/li>\n<li>der medf\u00f8lger en instruktion til hurtig ops\u00e6tning af lokal tjeneste uden ekstern IP;<\/li>\n<li>Ad Nihilum fungerer ogs\u00e5 p\u00e5 Android, og der er vedh\u00e6ftet et passende skript til bygning i Termux;<\/li>\n<li>enkelttr\u00e5det og synkron server.<\/li>\n<\/ul>\n<h3>\u00c6ndringer<\/h3>\n<h4>Omfattende redesign<\/h4>\n<ul>\n<li>Siderne til sendelse og modtagelse af beskeder er adskilt, med den tilsvarende klientkode.<\/li>\n<li>Generelt er designet blevet st\u00e6rkt \u00e6ndret og justeret i henhold til \u00f8nsker fra lorerne.<\/li>\n<li>\"Enkel\" og lokale klienter:\n<ul> <noindex><\/p>\n<li>en klient med et forenklet design er blevet tilf\u00f8jet. <a rel=\"nofollow\" href=\"https:\/\/adnihilum.net\/simple\">https:\/\/adnihilum.net\/simple<\/a>;<\/li>\n<p><\/noindex> <\/p>\n<li>klientsiderne kan gemmes lokalt og bruges fra file:\/\/.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Browserpolitikker<\/h4>\n<ul>\n<li>CSP er blevet implementeret for at bek\u00e6mpe XSS;<\/li>\n<li>serveren sender HSTS.<\/li>\n<\/ul>\n<h4>Andre \u00e6ndringer<\/h4>\n<ul>\n<li>projektet er blevet omd\u00f8bt fra Epha-ots;<\/li>\n<li>dom\u00e6net adnihilum.net er blevet k\u00f8bt;<\/li>\n<li>TLS sikres ved hj\u00e6lp af Let\u2019s Encrypt, det er godt at have i tankerne (ingen penge);<\/li>\n<li>arbejdet med filer er forenklet;<\/li>\n<li>overgang til fat-pegere;<\/li>\n<li>sm\u00e5 fejl er blevet rettet;<\/li>\n<li>auto-jsminify og bygning af klientfiler ved bygning via CMake.<\/li>\n<\/ul>\n<h3>Oversigt over protokollen<\/h3>\n<p>Generer tre tilf\u00e6ldige v\u00e6rdier: n\u00f8gle <strong>K<\/strong>, initialiseringsvektor <strong>N<\/strong> og salt <strong>Angreb op til 1,2<\/strong>. <strong>K<\/strong> \u2014 256 bit, <strong>N<\/strong> \u2014 96 bit, <strong>Angreb op til 1,2<\/strong> \u2014 128 bit.<\/p>\n<p>Udskriv <strong>ID<\/strong> af <strong>K<\/strong> og <strong>Angreb op til 1,2<\/strong> ved hj\u00e6lp af HKDF baseret p\u00e5 SHA-256.<\/p>\n<p>Dann en streng af yderligere autentificerede data <strong>aad<\/strong> \u2014 det er blot en streng af typen: id=ID<\/p>\n<p>Hvis brugeren har angivet en adgangskode:<\/p>\n<ul>\n<li>udskriv <strong>Pk<\/strong> fra adgangskoden og <strong>Angreb op til 1,2<\/strong> ved hj\u00e6lp af PBKDF2, SHA-256, 800000 iterationer;<\/li>\n<li>den samme salt bruges til alt;<\/li>\n<li>krypter data ved hj\u00e6lp af AES-GCM, bruge n\u00f8gle <strong>Pk<\/strong>, IV\/nonce <strong>N<\/strong> og overf\u00f8r <strong>aad<\/strong>.<\/li>\n<\/ul>\n<p>Tilf\u00f8j en to-byt tag til allerede krypterede data, hvis der var en adgangskode, eller til de originale data, hvis der ikke var nogen adgangskode.<\/p>\n<p>Den f\u00f8rste byte har v\u00e6rdien: den viser, om dataene blev krypteret med en adgangskode:<\/p>\n<ul>\n<li>0x73 \u2014 data er krypteret med en adgangskode;<\/li>\n<li>0x13 \u2014 data er ikke krypteret med en adgangskode.<\/li>\n<\/ul>\n<p>Andet byte \u2014 konstant v\u00e6rdi 0x37.<\/p>\n<p>Krypter resultatet igen med AES-GCM, og brug den samme iv = N og den samme <strong>aad<\/strong>. Dette giver den endelige krypterede tekst <strong>ct<\/strong>.<\/p>\n<p>Sammenk\u00e6d bytes i en streng: blob = N .. S .. ct<\/p>\n<p>Send <strong>blob<\/strong> til serveren sammen med <strong>ID<\/strong>. Serveren returnerer <strong>blob<\/strong> p\u00e5 dette <strong>ID<\/strong> og kan ikke \u00e6ndre det: klienten vil f\u00f8rst verificere <strong>ID<\/strong> ved hj\u00e6lp af <strong>N<\/strong> og <strong>K<\/strong> allerede f\u00f8r dekrypteringen og derefter \u2014 gennem <strong>aad<\/strong>.<\/p>\n<p>Klienten opbevarer <strong>K<\/strong>. <strong>K<\/strong> sendes aldrig til serveren. <strong>Pk<\/strong> sendes heller ikke; alt relateret til adgangskoden slettes fra hukommelsen.<\/p>\n<p>Klienten danner et link: origin\/#ID\/K<\/p>\n<p>Her <strong>ID<\/strong> og <strong>K<\/strong> \u2014 strenge i base64url format.<\/p>\n<p>N\u00e5r modtageren \u00e5bner linket:<\/p>\n<ul>\n<li>browseren ignorerer alt, der starter med #; dette kaldes location.hash;<\/li>\n<li>klientapplikationen indl\u00e6ses fra serveren;<\/li>\n<li>efter min mening er dette det st\u00f8rste sikkerhedsproblem: vi st\u00e5r faktisk igen overfor, at \"TLS er s\u00e5rbart\";<\/li>\n<li>men intet forhindrer opbevaring af klient offline;<\/li>\n<li>ideelt set b\u00f8r der v\u00e6re en separat standalone-klient.<\/li>\n<\/ul>\n<p>Klientens JavaScript tjekker location.hash, og hvis der er <strong>ID<\/strong> og <strong>K<\/strong>, indl\u00e6ser det data fra serveren.<\/p>\n<p>Derefter tjekker det dem, dekrypterer og, hvis n\u00f8dvendigt, anmoder om adgangskoden og dekrypterer igen.<\/p>\n<h3>Licens<\/h3>\n<p>Projektet distribueres under GPLv3.<\/p>\n<p>Kilde: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.linux.org.ru\/news\/opensource\/18293734\">linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0440\u0435\u043b\u0438\u0437 Ad Nihilum 0.4.3 \u2014 \u043c\u0438\u043d\u0438\u043c\u0430\u043b\u0438\u0441\u0442\u0438\u0447\u043d\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0438\u0441\u0430 \u0434\u043b\u044f \u043e\u0431\u043c\u0435\u043d\u0430 \u0437\u0430\u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u043c\u0438 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f\u043c\u0438 \u043f\u043e \u043f\u0440\u0438\u043d\u0446\u0438\u043f\u0443 &laquo;\u043f\u0440\u043e\u0447\u0438\u0442\u0430\u043b \u2014 \u0441\u0436\u0435\u0433&raquo;, \u043e\u0440\u0438\u0435\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u0432 \u043f\u0435\u0440\u0432\u0443\u044e \u043e\u0447\u0435\u0440\u0435\u0434\u044c \u043d\u0430 self-hosting. C\u0435\u0440\u0432\u0435\u0440 \u0432\u044b\u0441\u0442\u0443\u043f\u0430\u0435\u0442 \u043b\u0438\u0448\u044c \u0432 \u0440\u043e\u043b\u0438 \u0433\u043b\u0443\u0445\u043e\u0433\u043e \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430. \u0428\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0438 \u0440\u0430\u0441\u0448\u0438\u0444\u0440\u043e\u0432\u043a\u0430 \u043f\u0440\u043e\u0438\u0441\u0445\u043e\u0434\u044f\u0442 \u0438\u0441\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u043d\u0430 \u0441\u0442\u043e\u0440\u043e\u043d\u0435 \u043a\u043b\u0438\u0435\u043d\u0442\u0430, \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435 (\u0447\u0435\u0440\u0435\u0437 AES-GCM). \u041e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u0438 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u0435 \u0437\u0430\u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0438 \u0440\u0430\u0441\u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u0435, \u0441\u0435\u0440\u0432\u0435\u0440 \u043d\u0438\u043a\u043e\u0433\u0434\u0430 \u043d\u0435 \u0432\u0438\u0434\u0438\u0442 \u043a\u043b\u044e\u0447\u0430; \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u0441\u043b\u043e\u044f [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-172755","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0440\u0435\u043b\u0438\u0437 Ad Nihilum 0.4.3 \u2014 \u043c\u0438\u043d\u0438\u043c\u0430\u043b\u0438\u0441\u0442\u0438\u0447\u043d\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0438\u0441\u0430 \u0434\u043b\u044f \u043e\u0431\u043c\u0435\u043d\u0430 \u0437\u0430\u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u043c\u0438 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f\u043c\u0438 \u043f\u043e \u043f\u0440\u0438\u043d\u0446\u0438\u043f\u0443 \u00ab\u043f\u0440\u043e\u0447\u0438\u0442\u0430\u043b \u2014 \u0441\u0436\u0435\u0433\u00bb, \u043e\u0440\u0438\u0435\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u0432 \u043f\u0435\u0440\u0432\u0443\u044e \u043e\u0447\u0435\u0440\u0435\u0434\u044c \u043d\u0430 self-hosting. 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