{"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\/hu\/blog\/news\/ad-nihilum-0-4-3","title":{"rendered":"Ad Nihilum 0.4.3","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Megjelent az Ad Nihilum 0.4.3 \u2014 egy minimalista szolg\u00e1ltat\u00e1s titkos\u00edtott \u00fczenetek cser\u00e9j\u00e9re, a &laquo;elolvastam \u2014 el\u00e9gettem&raquo; elv alapj\u00e1n, els\u0151dlegesen a self-hostingra \u00f6sszpontos\u00edtva.<\/p>\n<p>A szerver csup\u00e1n egy z\u00e1rt t\u00e1rol\u00f3k\u00e9nt m\u0171k\u00f6dik. A titkos\u00edt\u00e1s \u00e9s a visszafejt\u00e9s kiz\u00e1r\u00f3lag az \u00fcgyf\u00e9l oldal\u00e1n, a b\u00f6ng\u00e9sz\u0151ben t\u00f6rt\u00e9nik (AES-GCM haszn\u00e1lat\u00e1val).<\/p>\n<h3>Jellemz\u0151k<\/h3>\n<ul>\n<li>helyi titkos\u00edt\u00e1s \u00e9s visszafejt\u00e9s, <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/server\/\"   title=\"szerver\" data-wpil-keyword-link=\"linked\">szerver<\/a> soha nem l\u00e1tja a kulcsot;<\/li>\n<li>tov\u00e1bbi titkos\u00edt\u00e1si r\u00e9teg jelsz\u00f3val, amelyr\u0151l (1) a szerver nem tudhat, (2) nem lehet kider\u00edteni a tov\u00e1bb\u00edtott hivatkoz\u00e1s alapj\u00e1n;<\/li>\n<li>a projekt k\u00f6r\u00fclbel\u00fcl 2200 sor szerveroldali k\u00f3dot tartalmaz C nyelven \u00e9s 600 sor kliensoldali k\u00f3dot JS nyelven, ami megk\u00f6nny\u00edti az audit\u00e1l\u00e1st;<\/li>\n<li>Az Ad Nihilum csup\u00e1n a libmicrohttpd-t\u0151l f\u00fcgg. A QR k\u00f3dok gener\u00e1l\u00e1s\u00e1hoz egy m\u00f3dos\u00edtott verzi\u00f3t biztos\u00edtanak a QRCode.js-b\u00f3l;<\/li>\n<li>csatolt egy gyors telep\u00edt\u00e9si \u00fatmutat\u00f3t helyi szolg\u00e1ltat\u00e1s ind\u00edt\u00e1s\u00e1hoz k\u00fcls\u0151 IP n\u00e9lk\u00fcl;<\/li>\n<li>Az Ad Nihilum Androidon is m\u0171k\u00f6dik, csatolva van a sz\u00fcks\u00e9ges script a Termux-hoz val\u00f3 \u00f6ssze\u00e1ll\u00edt\u00e1shoz;<\/li>\n<li>egysz\u00e1l\u00fa \u00e9s szinkron szerver.<\/li>\n<\/ul>\n<h3>V\u00e1ltoz\u00e1sok<\/h3>\n<h4>\u00c1tfog\u00f3 \u00fajratervez\u00e9s<\/h4>\n<ul>\n<li>Az \u00fczenetek k\u00fcld\u00e9si \u00e9s fogad\u00e1si oldala el lett v\u00e1lasztva, a megfelel\u0151 kliensoldali k\u00f3d.<\/li>\n<li>A diz\u00e1jn l\u00e9nyegesen megv\u00e1ltozott \u00e9s korrig\u00e1lva lett a l\u00f3rchanya k\u00edv\u00e1ns\u00e1gainak figyelembev\u00e9tel\u00e9vel.<\/li>\n<li>&laquo;Egyszer\u0171&raquo; \u00e9s helyi kliensek:\n<ul> <noindex><\/p>\n<li>hozz\u00e1adva egy egyszer\u0171s\u00edtett diz\u00e1jnnal rendelkez\u0151 kliens <a rel=\"nofollow\" href=\"https:\/\/adnihilum.net\/simple\">https:\/\/adnihilum.net\/simple<\/a>;<\/li>\n<p><\/noindex> <\/p>\n<li>a kliensoldali oldalak helyben menthet\u0151k el \u00e9s a file:\/\/\/ -b\u0151l haszn\u00e1lhat\u00f3k.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>B\u00f6ng\u00e9sz\u0151i politik\u00e1k<\/h4>\n<ul>\n<li>CSP-t vezettek be az XSS ellen;<\/li>\n<li>a szerver HSTS-t k\u00fcld.<\/li>\n<\/ul>\n<h4>nem tekinthet\u0151k<\/h4>\n<ul>\n<li>a projekt \u00e1tnevez\u00e9sre ker\u00fclt Epha-ots-b\u00f3l;<\/li>\n<li>megv\u00e1s\u00e1rolva az adnihilum.net dom\u00e9n;<\/li>\n<li>A TLS a Let&rsquo;s Encrypt seg\u00edts\u00e9g\u00e9vel biztos\u00edtott, ezt \u00e9rdemes figyelembe venni (nincs p\u00e9nz);<\/li>\n<li>a f\u00e1jlok kezel\u00e9se egyszer\u0171s\u00f6d\u00f6tt;<\/li>\n<li>\u00e1t\u00e1ll\u00e1s fat-pointerekre;<\/li>\n<li>kisebb hib\u00e1k jav\u00edtva;<\/li>\n<li>auto-jsminify \u00e9s kliensoldali f\u00e1jlok \u00f6ssze\u00e1ll\u00edt\u00e1sa CMake-en kereszt\u00fcl.<\/li>\n<\/ul>\n<h3>A protokoll \u00e1ttekint\u00e9se<\/h3>\n<p>Gener\u00e1ljon h\u00e1rom v\u00e9letlenszer\u0171 \u00e9rt\u00e9ket: kulcs <strong>K<\/strong>, inicializ\u00e1l\u00f3 vektor <strong>N<\/strong> \u00e9s s\u00f3 <strong>S<\/strong>. <strong>K<\/strong> \u2014 256 bit, <strong>N<\/strong> \u2014 96 bit, <strong>S<\/strong> \u2014 128 bit.<\/p>\n<p>[user@testhost ~]$ tail -1 temp\nLalalala... <strong>) \u00e9s<\/strong> a <strong>K<\/strong> \u00e9s <strong>S<\/strong> HKDF SHA-256 alap\u00fa alkalmaz\u00e1s\u00e1val.<\/p>\n<p>Hozzon l\u00e9tre egy kiterjesztett azonos\u00edtott adatokb\u00f3l \u00e1ll\u00f3 sort <strong>aad<\/strong> \u2014 ez egyszer\u0171en a k\u00f6vetkez\u0151 form\u00e1tum\u00fa sz\u00f6veg: id=ID<\/p>\n<p>Ha a felhaszn\u00e1l\u00f3 megadta a jelsz\u00f3t:<\/p>\n<ul>\n<li>azt jelen\u00edtse meg <strong>Pk<\/strong> a jelsz\u00f3b\u00f3l \u00e9s <strong>S<\/strong> PBKDF2, SHA-256, 800000 iter\u00e1ci\u00f3n kereszt\u00fcl;<\/li>\n<li>ugyanaz a s\u00f3 ker\u00fcl felhaszn\u00e1l\u00e1sra mindv\u00e9gig;<\/li>\n<li>az adatokat AES-GCM haszn\u00e1lat\u00e1val titkos\u00edtja, a kulcs haszn\u00e1lat\u00e1val <strong>Pk<\/strong>, IV\/nonce <strong>N<\/strong> \u00e9s tov\u00e1bb\u00edtva <strong>aad<\/strong>.<\/li>\n<\/ul>\n<p>Adjon hozz\u00e1 egy k\u00e9thetes c\u00edmk\u00e9t a m\u00e1r titkos\u00edtott adatokhoz, ha jelsz\u00f3 volt, vagy az alapadatokhoz, ha nem volt jelsz\u00f3.<\/p>\n<p>Az els\u0151 byte \u00e9rt\u00e9ke: megmutatja, hogy az adatokat jelsz\u00f3val titkos\u00edtott\u00e1k-e:<\/p>\n<ul>\n<li>0x73 \u2014 az adatok jelsz\u00f3val vannak titkos\u00edtva;<\/li>\n<li>0x13 \u2014 az adatok nincsenek jelsz\u00f3val titkos\u00edtva.<\/li>\n<\/ul>\n<p>A m\u00e1sodik b\u00e1jt \u00e1lland\u00f3 \u00e9rt\u00e9ke 0x37.<\/p>\n<p>Ism\u00e9t titkos\u00edtani az AES-GCM seg\u00edts\u00e9g\u00e9vel, ugyanazzal az iv = N \u00e9s ugyanazzal <strong>aad<\/strong>. Ez adja a v\u00e9gs\u0151 titkos sz\u00f6veget <strong>ct<\/strong>.<\/p>\n<p>B\u00e1jtok \u00f6sszef\u0171z\u00e9se egy sorba: blob = N .. S .. ct<\/p>\n<p>K\u00fcld\u00e9s <strong>blob<\/strong> a szerverre a k\u00f6vetkez\u0151vel: <strong>) \u00e9s<\/strong>. A szerver visszaadja <strong>blob<\/strong> azon kereszt\u00fcl <strong>) \u00e9s<\/strong> \u00e9s nem tudja azt megv\u00e1ltoztatni: az \u00fcgyf\u00e9l el\u0151sz\u00f6r ellen\u0151rizni fogja <strong>) \u00e9s<\/strong> a <strong>N<\/strong> \u00e9s <strong>K<\/strong> m\u00e9g a dek\u00f3dol\u00e1s el\u0151tt, majd \u2014 kereszt\u00fcl <strong>aad<\/strong>.<\/p>\n<p>Az \u00fcgyf\u00e9l t\u00e1rolja <strong>K<\/strong>. <strong>K<\/strong> soha nem k\u00fcldik a szerverre. <strong>Pk<\/strong> ez sem k\u00fcld\u0151dik el; minden, ami a jelsz\u00f3val kapcsolatos, t\u00f6rl\u00e9sre ker\u00fcl a mem\u00f3ri\u00e1b\u00f3l.<\/p>\n<p>Az \u00fcgyf\u00e9l l\u00e9trehoz egy linket: origin\/#ID\/K<\/p>\n<p>Itt <strong>) \u00e9s<\/strong> \u00e9s <strong>K<\/strong> \u2014 base64url form\u00e1tumban.<\/p>\n<p>Amikor a c\u00edmzett megnyitja a linket:<\/p>\n<ul>\n<li>a b\u00f6ng\u00e9sz\u0151 elvet mindent, ami # karakterrel kezd\u0151dik; ezt location.hash-nak h\u00edvj\u00e1k;<\/li>\n<li>az \u00fcgyf\u00e9lalkalmaz\u00e1s bet\u00f6lt\u0151dik a szerverr\u0151l;<\/li>\n<li>v\u00e9lem\u00e9nyem szerint ez a f\u0151 lyuk: val\u00f3j\u00e1ban \u00fajra a \"TLS lyukas\" probl\u00e9m\u00e1val tal\u00e1lkozunk;<\/li>\n<li>azonban semmi sem akad\u00e1lyozza meg az \u00fcgyf\u00e9l offline t\u00e1rol\u00e1s\u00e1t;<\/li>\n<li>ide\u00e1lis esetben legyen egy k\u00fcl\u00f6n\u00e1ll\u00f3, \u00f6n\u00e1ll\u00f3 \u00fcgyf\u00e9l.<\/li>\n<\/ul>\n<p>Az \u00fcgyf\u00e9l JavaScript ellen\u0151rzi a location.hash-t, \u00e9s ha abban van <strong>) \u00e9s<\/strong> \u00e9s <strong>K<\/strong>, adatok t\u00f6lt\u0151dnek le a szerverr\u0151l.<\/p>\n<p>Ezut\u00e1n ellen\u0151rzi \u0151ket, dek\u00f3dolja, \u00e9s ha sz\u00fcks\u00e9ges, k\u00e9ri a jelsz\u00f3t, \u00e9s ism\u00e9t dek\u00f3dolja.<\/p>\n<h3>Licenc<\/h3>\n<p>A projekt GPLv3 alatt terjed.<\/p>\n<p>Forr\u00e1s: <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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