{"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\/pl\/blog\/news\/ad-nihilum-0-4-3","title":{"rendered":"Ad Nihilum 0.4.3","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Wydano Ad Nihilum 0.4.3 \u2014 minimalistyczn\u0105 us\u0142ug\u0119 do wymiany zaszyfrowanych wiadomo\u015bci na zasadzie \u201eprzeczytaj \u2014 spal\u201d, skierowan\u0105 przede wszystkim na self-hosting.<\/p>\n<p>Serwer pe\u0142ni jedynie rol\u0119 nieczu\u0142ego magazynu. Szyfrowanie i deszyfrowanie odbywaj\u0105 si\u0119 wy\u0142\u0105cznie po stronie klienta, w przegl\u0105darce (przez AES-GCM).<\/p>\n<h3>Cechy<\/h3>\n<ul>\n<li>lokalne szyfrowanie i deszyfrowanie, <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pl\/server\/\"   title=\"serwer\" data-wpil-keyword-link=\"linked\">serwer<\/a> nigdy nie widzi klucza;<\/li>\n<li>wsparcie dla dodatkowej warstwy szyfrowania has\u0142em, o kt\u00f3rym (1) serwer nie mo\u017ce wiedzie\u0107, (2) nie mo\u017cna pozna\u0107 po przekazywanym linku;<\/li>\n<li>projekt zawiera oko\u0142o 2200 linii kodu serwera w C i 600 linii kodu klienta w JS, co u\u0142atwia audyt;<\/li>\n<li>Ad Nihilum zale\u017cy tylko od libmicrohttpd. Do generowania kod\u00f3w QR dostarczana jest zmodyfikowana wersja QRCode.js;<\/li>\n<li>do\u0142\u0105czona instrukcja szybkiego uruchomienia lokalnej us\u0142ugi bez zewn\u0119trznego IP;<\/li>\n<li>Ad Nihilum dzia\u0142a r\u00f3wnie\u017c na Androidzie, do\u0142\u0105czony odpowiedni skrypt do budowy w Termux;<\/li>\n<li>jedno-w\u0105tkowy i synchroniczny serwer.<\/li>\n<\/ul>\n<h3>Zmiany<\/h3>\n<h4>Ogromny redesign<\/h4>\n<ul>\n<li>Strony wysy\u0142ania i odbierania wiadomo\u015bci zosta\u0142y oddzielone, odpowiedni kod klienta.<\/li>\n<li>Og\u00f3lnie projekt zosta\u0142 mocno zmieniony i dostosowany do sugestii lorce.<\/li>\n<li>\u201eProste\u201d i lokalne klienty:\n<ul> <noindex><\/p>\n<li>dodany klient z uproszczonym interfejsem <a rel=\"nofollow\" href=\"https:\/\/adnihilum.net\/simple\">https:\/\/adnihilum.net\/simple<\/a>;<\/li>\n<p><\/noindex> <\/p>\n<li>Strony klienckie mo\u017cna zapisa\u0107 lokalnie i u\u017cywa\u0107 z file:\/\/.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Polityki przegl\u0105darki<\/h4>\n<ul>\n<li>wdro\u017cono CSP w celu walki z XSS;<\/li>\n<li>serwer wysy\u0142a HSTS.<\/li>\n<\/ul>\n<h4>Inne zmiany<\/h4>\n<ul>\n<li>projekt zosta\u0142 przemianowany z Epha-ots;<\/li>\n<li>zakupiono domen\u0119 adnihilum.net;<\/li>\n<li>TLS zapewniane jest przez Let\u2019s Encrypt, warto to mie\u0107 na uwadze (brak funduszy);<\/li>\n<li>usprawniono prac\u0119 z plikami;<\/li>\n<li>przej\u015bcie na wska\u017aniki fat-pointer;<\/li>\n<li>naprawiono drobne b\u0142\u0119dy;<\/li>\n<li>auto-jsminify i budowa plik\u00f3w klienckich przy kompilacji przez CMake.<\/li>\n<\/ul>\n<h3>Przegl\u0105d protoko\u0142u<\/h3>\n<p>Wygenerowa\u0107 trzy losowe warto\u015bci: klucz, <strong>K<\/strong>, wektor inicjalizacji <strong>N<\/strong> i s\u00f3l <strong>S<\/strong>. <strong>K<\/strong> \u2014 256 bit\u00f3w, <strong>N<\/strong> \u2014 96 bit\u00f3w, <strong>S<\/strong> \u2014 128 bit\u00f3w.<\/p>\n<p>Wyp\u0142aci\u0107 <strong>ID<\/strong> z <strong>K<\/strong> i <strong>S<\/strong> z wykorzystaniem HKDF opartego na SHA-256.<\/p>\n<p>Uformowa\u0107 ci\u0105g dodatkowych uwierzytelnionych danych <strong>aad<\/strong> \u2014 to zwyk\u0142y ci\u0105g w formie: id=ID<\/p>\n<p>Je\u015bli u\u017cytkownik ustawi\u0142 has\u0142o:<\/p>\n<ul>\n<li>wyprowadzi\u0107 <strong>Pk<\/strong> z has\u0142a i <strong>S<\/strong> z wykorzystaniem PBKDF2, SHA-256, 800000 iteracji;<\/li>\n<li>te sama s\u00f3l u\u017cywana jest wsz\u0119dzie;<\/li>\n<li>zaszyfrowa\u0107 dane za pomoc\u0105 AES-GCM, u\u017cywaj\u0105c klucza <strong>Pk<\/strong>, IV\/nonce <strong>N<\/strong> i przekaza\u0107 <strong>aad<\/strong>.<\/li>\n<\/ul>\n<p>Doda\u0107 dwubajtowy znacznik do ju\u017c zaszyfrowanych danych, je\u015bli has\u0142o by\u0142o, lub do danych \u017ar\u00f3d\u0142owych, je\u015bli has\u0142a nie by\u0142o.<\/p>\n<p>Pierwszy bajt ma warto\u015b\u0107: wskazuje, czy dane by\u0142y szyfrowane has\u0142em:<\/p>\n<ul>\n<li>0x73 \u2014 dane s\u0105 szyfrowane has\u0142em;<\/li>\n<li>0x13 \u2014 dane nie s\u0105 szyfrowane has\u0142em.<\/li>\n<\/ul>\n<p>Drugi bajt \u2014 sta\u0142a warto\u015b\u0107 0x37.<\/p>\n<p>Ponownie zaszyfruj wynik za pomoc\u0105 AES-GCM, u\u017cywaj\u0105c tego samego iv = N oraz ten sam <strong>aad<\/strong>. To daje finalny szyfrogram <strong>ct<\/strong>.<\/p>\n<p>Po\u0142\u0105cz bajty w ci\u0105g: blob = N .. S .. ct<\/p>\n<p>Wy\u015blij <strong>blob<\/strong> na serwer razem z <strong>ID<\/strong>. Serwer zwraca <strong>blob<\/strong> na tej podstawie <strong>ID<\/strong> i nie mo\u017ce go podmieni\u0107: klient najpierw sprawdzi <strong>ID<\/strong> z u\u017cyciem <strong>N<\/strong> i <strong>K<\/strong> jeszcze przed odszyfrowaniem, a nast\u0119pnie \u2014 przez <strong>aad<\/strong>.<\/p>\n<p>Klient przechowuje <strong>K<\/strong>. <strong>K<\/strong> nigdy nie jest wysy\u0142ane na serwer. <strong>Pk<\/strong> te\u017c nie jest wysy\u0142ane; wszystko, co zwi\u0105zane z has\u0142em, jest usuwane z pami\u0119ci.<\/p>\n<p>Klient formuje link: origin\/#ID\/K<\/p>\n<p>Tutaj <strong>ID<\/strong> i <strong>K<\/strong> \u2014 ci\u0105gi w formacie base64url.<\/p>\n<p>Gdy odbiorca otwiera link:<\/p>\n<ul>\n<li>przegl\u0105darka odrzuca wszystko, co zaczyna si\u0119 od #; to si\u0119 nazywa location.hash;<\/li>\n<li>aplikacja kliencka \u0142adowana jest z serwera;<\/li>\n<li>moim zdaniem, to jest g\u0142\u00f3wn\u0105 luk\u0105: w rzeczywisto\u015bci znowu wracamy do tego, \u017ce 'TLS jest dziurawy';<\/li>\n<li>nie ma jednak nic, co by przeszkadza\u0142o w przechowywaniu klienta offline;<\/li>\n<li>w idealnym przypadku powinien by\u0107 osobny klient samodzielny.<\/li>\n<\/ul>\n<p>Klientski JavaScript sprawdza location.hash, a je\u015bli jest tam <strong>ID<\/strong> i <strong>K<\/strong>, pobiera dane z serwera.<\/p>\n<p>Nast\u0119pnie sprawdza je, odszyfrowuje i, w razie potrzeby, prosi o has\u0142o i odszyfrowuje ponownie.<\/p>\n<h3>Licencja<\/h3>\n<p>Projekt jest rozpowszechniany na licencji GPLv3.<\/p>\n<p>\u0179r\u00f3d\u0142o: <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 5.0.1.1 - 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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