{"id":102843,"date":"2022-01-02T21:37:00","date_gmt":"2022-01-02T19:37:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/%d0%b4%d0%bb%d1%8f-%d1%8f%d0%b4%d1%80%d0%b0-linux-%d0%bf%d1%80%d0%b5%d0%b4%d0%bb%d0%be%d0%b6%d0%b5%d0%bd%d0%b0-%d1%80%d0%b5%d0%b0%d0%bb%d0%b8%d0%b7%d0%b0%d1%86%d0%b8%d1%8f-dev-random-%d0%b8%d0%b7"},"modified":"2022-01-02T21:37:00","modified_gmt":"2022-01-02T19:37:00","slug":"%d0%b4%d0%bb%d1%8f-%d1%8f%d0%b4%d1%80%d0%b0-linux-%d0%bf%d1%80%d0%b5%d0%b4%d0%bb%d0%be%d0%b6%d0%b5%d0%bd%d0%b0-%d1%80%d0%b5%d0%b0%d0%bb%d0%b8%d0%b7%d0%b0%d1%86%d0%b8%d1%8f-dev-random-%d0%b8%d0%b7","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/%d0%b4%d0%bb%d1%8f-%d1%8f%d0%b4%d1%80%d0%b0-linux-%d0%bf%d1%80%d0%b5%d0%b4%d0%bb%d0%be%d0%b6%d0%b5%d0%bd%d0%b0-%d1%80%d0%b5%d0%b0%d0%bb%d0%b8%d0%b7%d0%b0%d1%86%d0%b8%d1%8f-dev-random-%d0%b8%d0%b7","title":{"rendered":"An implementation of \/dev\/random, decoupled from SHA-1, has been proposed for the Linux kernel.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Jason A. Donenfeld, a szerz\u0151je a VPN WireGuard-nak, bemutatta a RDRAND \u00e1l-\u00fajrasz\u00e1mol\u00e1s\u00e1nak friss\u00edtett megval\u00f3s\u00edt\u00e1s\u00e1t, amely a Linux kernelben kezeli a \/dev\/random \u00e9s \/dev\/urandom eszk\u00f6z\u00f6ket. November v\u00e9g\u00e9n Jason beker\u00fclt a random driver karbantart\u00f3i k\u00f6z\u00e9, \u00e9s most k\u00f6zz\u00e9tette munk\u00e1j\u00e1nak els\u0151 eredm\u00e9nyeit a rekonstrukci\u00f3val kapcsolatban. <\/p>\n

Az \u00faj megval\u00f3s\u00edt\u00e1s figyelemre m\u00e9lt\u00f3 a BLAKE2s hash-funkci\u00f3ra val\u00f3 \u00e1tt\u00e9r\u00e9s miatt, amelyet az SHA1 helyett haszn\u00e1lnak az entropia kever\u00e9si m\u0171veletekn\u00e9l. Ez a v\u00e1ltoztat\u00e1s lehet\u0151v\u00e9 tette, hogy a hamis\u00edtatlan v\u00e9letlensz\u00e1m-gener\u00e1tor biztons\u00e1g\u00e1t n\u00f6velj\u00fck, mivel megszabadultunk a probl\u00e9m\u00e1s SHA1 algoritmust\u00f3l, \u00e9s kiz\u00e1rtuk a v\u00e9letlensz\u00e1m-gener\u00e1tor inicializ\u00e1l\u00f3 vektor\u00e1nak \u00fajra\u00edr\u00e1s\u00e1t. Mivel a BLAKE2s algoritmus teljes\u00edtm\u00e9nyben is meghaladja az SHA1-et, \u00edgy haszn\u00e1lata a v\u00e9letlensz\u00e1m-gener\u00e1tor teljes\u00edtm\u00e9ny\u00e9re is pozit\u00edvan hatott (az Intel i7-11850H processzorral v\u00e9gzett tesztel\u00e9s sor\u00e1n 131%-os sebess\u00e9gn\u00f6veked\u00e9st mutattak ki). A BLAKE2-re val\u00f3 \u00e1tt\u00e9r\u00e9s m\u00e1sik el\u0151nye az entropia kever\u00e9s\u00e9ben a haszn\u00e1lt algoritmusok egys\u00e9ges\u00edt\u00e9se volt \u2014 a BLAKE2-t a ChaCha titkos\u00edt\u00f3ban is haszn\u00e1lj\u00e1k, amely m\u00e1r a v\u00e9letlenszer\u0171 szekvenci\u00e1k el\u0151\u00e1ll\u00edt\u00e1s\u00e1ra is alkalmaz\u00e1sra ker\u00fclt. <\/p>\n

Ezen k\u00edv\u00fcl jav\u00edt\u00e1sok t\u00f6rt\u00e9ntek a getrandom h\u00edv\u00e1sban haszn\u00e1lt kripto-megb\u00edzhat\u00f3 v\u00e9letlensz\u00e1m-gener\u00e1toron, a CRNG-n. A fejleszt\u00e9sek a lass\u00fa RDRAND gener\u00e1l\u00f3 h\u00edv\u00e1s\u00e1nak korl\u00e1toz\u00e1s\u00e1ra ir\u00e1nyulnak, amikor a v\u00e9letlensz\u00e1m-berendez\u00e9sb\u0151l nyerj\u00fck az entropi\u00e1t, \u00edgy a teljes\u00edtm\u00e9ny 3,7-szeres n\u00f6veked\u00e9se \u00e9rhet\u0151 el. Jason megmutatta, hogy az RDRAND h\u00edv\u00e1snak csak akkor van \u00e9rtelme, ha a CRNG m\u00e9g teljesen nincs inicializ\u00e1lva, de ha a CRNG inicializ\u00e1l\u00e1sa befejez\u0151d\u00f6tt, akkor a h\u00edv\u00e1s nem befoly\u00e1solja a gener\u00e1lt sorozat min\u0151s\u00e9g\u00e9t, \u00e9s ebben az esetben el lehet ker\u00fclni az RDRAND h\u00edv\u00e1s\u00e1t. <\/p>\n

A v\u00e1ltoztat\u00e1sokat a 5.17-es kernelbe val\u00f3 beilleszt\u00e9sre tervezik, \u00e9s m\u00e1r \u00e1tn\u00e9zt\u00e9k Ted Ts\u2019o (a random driver m\u00e1sodik karbantart\u00f3ja), Greg Kroah-Hartman (a Linux kernel stabil \u00e1ga\u00e9rt felel\u0151s) \u00e9s Jean-Philippe Aumasson (a BLAKE2\/3 algoritmusok szerz\u0151je) fejleszt\u0151i.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0414\u0436\u0435\u0439\u0441\u043e\u043d \u0414\u043e\u043d\u0435\u043d\u0444\u0438\u043b\u0434 (Jason A. Donenfeld), \u0430\u0432\u0442\u043e\u0440 VPN WireGuard, \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b \u043e\u0431\u043d\u043e\u0432\u043b\u0451\u043d\u043d\u0443\u044e \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u0433\u0435\u043d\u0435\u0440\u0430\u0442\u043e\u0440\u0430 \u043f\u0441\u0435\u0432\u0434\u043e\u0441\u043b\u0443\u0447\u0430\u0439\u043d\u044b\u0445 \u0447\u0438\u0441\u0435\u043b RDRAND, \u043e\u0442\u0432\u0435\u0447\u0430\u044e\u0449\u0435\u0433\u043e \u0437\u0430 \u0440\u0430\u0431\u043e\u0442\u0443 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 \/dev\/random \u0438 \/dev\/urandom \u0432 \u044f\u0434\u0440\u0435 Linux. \u0412 \u043a\u043e\u043d\u0446\u0435 \u043d\u043e\u044f\u0431\u0440\u044f \u0414\u0436\u0435\u0439\u0441\u043e\u043d \u0431\u044b\u043b \u0432\u043a\u043b\u044e\u0447\u0451\u043d \u0432 \u0447\u0438\u0441\u043b\u043e \u043c\u044d\u0439\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u043e\u0432 \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 random \u0438 \u0442\u0435\u043f\u0435\u0440\u044c \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u043f\u0435\u0440\u0432\u044b\u0435 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0441\u0432\u043e\u0435\u0439 \u0440\u0430\u0431\u043e\u0442\u044b \u043f\u043e \u0435\u0433\u043e \u043f\u0435\u0440\u0435\u0440\u0430\u0431\u043e\u0442\u043a\u0435. \u041d\u043e\u0432\u0430\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u043f\u0440\u0438\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u044c\u043d\u0430 \u043f\u0435\u0440\u0435\u0445\u043e\u0434\u043e\u043c \u043d\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0445\u0435\u0448-\u0444\u0443\u043d\u043a\u0446\u0438\u0438 BLAKE2s \u0432\u043c\u0435\u0441\u0442\u043e […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-102843","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47A Linux kernel sz\u00e1m\u00e1ra javasolt megval\u00f3s\u00edt\u00e1s a \/dev\/random-ra, amely megszabadult a SHA-1-hez val\u00f3 k\u00f6t\u0151d\u00e9st\u0151l | ProHoster","description":"Jason A. Donenfeld, a szerz\u0151je a VPN WireGuard-nak, bemutatta a RDRAND \u00e1l-\u00fajrasz\u00e1mol\u00e1s\u00e1nak friss\u00edtett megval\u00f3s\u00edt\u00e1s\u00e1t, amely a Linux kernelben kezeli a \/dev\/random \u00e9s \/dev\/urandom eszk\u00f6z\u00f6ket.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/%d0%b4%d0%bb%d1%8f-%d1%8f%d0%b4%d1%80%d0%b0-linux-%d0%bf%d1%80%d0%b5%d0%b4%d0%bb%d0%be%d0%b6%d0%b5%d0%bd%d0%b0-%d1%80%d0%b5%d0%b0%d0%bb%d0%b8%d0%b7%d0%b0%d1%86%d0%b8%d1%8f-dev-random-%d0%b8%d0%b7","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hu_HU","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0414\u043b\u044f \u044f\u0434\u0440\u0430 Linux \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u0430 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \/dev\/random, \u0438\u0437\u0431\u0430\u0432\u043b\u0435\u043d\u043d\u0430\u044f \u043e\u0442 \u043f\u0440\u0438\u0432\u044f\u0437\u043a\u0438 \u043a SHA-1 | ProHoster","og:description":"\u0414\u0436\u0435\u0439\u0441\u043e\u043d \u0414\u043e\u043d\u0435\u043d\u0444\u0438\u043b\u0434 (Jason A. Donenfeld), \u0430\u0432\u0442\u043e\u0440 VPN WireGuard, \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b \u043e\u0431\u043d\u043e\u0432\u043b\u0451\u043d\u043d\u0443\u044e \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u0433\u0435\u043d\u0435\u0440\u0430\u0442\u043e\u0440\u0430 \u043f\u0441\u0435\u0432\u0434\u043e\u0441\u043b\u0443\u0447\u0430\u0439\u043d\u044b\u0445 \u0447\u0438\u0441\u0435\u043b RDRAND, \u043e\u0442\u0432\u0435\u0447\u0430\u044e\u0449\u0435\u0433\u043e \u0437\u0430 \u0440\u0430\u0431\u043e\u0442\u0443 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 \/dev\/random \u0438 \/dev\/urandom \u0432 \u044f\u0434\u0440\u0435 Linux.","og:url":"https:\/\/prohoster.info\/hu\/blog\/news\/%d0%b4%d0%bb%d1%8f-%d1%8f%d0%b4%d1%80%d0%b0-linux-%d0%bf%d1%80%d0%b5%d0%b4%d0%bb%d0%be%d0%b6%d0%b5%d0%bd%d0%b0-%d1%80%d0%b5%d0%b0%d0%bb%d0%b8%d0%b7%d0%b0%d1%86%d0%b8%d1%8f-dev-random-%d0%b8%d0%b7","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2022-01-02T19:37:00+00:00","article:modified_time":"2022-01-02T19:37:00+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"102843","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2022-01-02 19:38:23","updated":"2022-09-28 13:59:56","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/102843","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/comments?post=102843"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/102843\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/media?parent=102843"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/categories?post=102843"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/tags?post=102843"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}