{"id":116956,"date":"2024-07-05T09:05:08","date_gmt":"2024-07-05T07:05:08","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/razrabotchik-wireguard-serezno-uskoril-vyzov-getrandom-v-linux"},"modified":"2024-07-05T09:05:08","modified_gmt":"2024-07-05T07:05:08","slug":"razrabotchik-wireguard-serezno-uskoril-vyzov-getrandom-v-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/razrabotchik-wireguard-serezno-uskoril-vyzov-getrandom-v-linux","title":{"rendered":"Le d\u00e9veloppeur de Wireguard a consid\u00e9rablement acc\u00e9l\u00e9r\u00e9 l'appel de getrandom() dans Linux","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Jason A. Donenfeld, l'auteur de VPN WireGuard, a pr\u00e9sent\u00e9 des correctifs qui acc\u00e9l\u00e8rent consid\u00e9rablement l'obtention de nombres al\u00e9atoires du syst\u00e8me via la fonction getrandom(), implement\u00e9e \u00e0 travers l'appel syst\u00e8me correspondant de Linux. L'avantage de cette solution par rapport \u00e0 l'utilisation de \/dev\/random ou \/dev\/urandom est qu'elle n'est pas sujette aux attaques d'\u00e9puisement des descripteurs de fichiers, ce qui peut conduire \u00e0 des cl\u00e9s cryptographiques non initialis\u00e9es et non al\u00e9atoires. <\/p>\n

L'optimisation propos\u00e9e repose sur l'utilisation du m\u00e9canisme vDSO (objet partag\u00e9 dynamique virtuel), qui permet de d\u00e9placer le gestionnaire d'appel syst\u00e8me du noyau vers l'espace utilisateur et d'\u00e9viter les commutations de contexte. Dans le cas de getrandom(), l'impl\u00e9mentation de l'appel syst\u00e8me associ\u00e9 \u00e0 cette fonction est form\u00e9e en tant que vDSO, dont le code est pr\u00e9alablement charg\u00e9 dans l'espace d'adressage du processus directement par le noyau. Cette approche a permis d'acc\u00e9l\u00e9rer l'obtention de nombres al\u00e9atoires dans certaines situations jusqu'\u00e0 15 fois ou plus.
\n
Source : 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\u0441\u0442\u0430\u0432\u0438\u043b \u043f\u0430\u0442\u0447\u0438, \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0443\u0441\u043a\u043e\u0440\u044f\u044e\u0449\u0438\u0435 \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u0435 \u0441\u043b\u0443\u0447\u0430\u0439\u043d\u044b\u0445 \u0447\u0438\u0441\u0435\u043b \u043e\u0442 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0447\u0435\u0440\u0435\u0437 \u0444\u0443\u043d\u043a\u0446\u0438\u044e getrandom(), \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u0443\u044e \u0447\u0435\u0440\u0435\u0437 \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u0439 \u0432\u044b\u0437\u043e\u0432 Linux. \u041f\u0440\u0435\u0438\u043c\u0443\u0449\u0435\u0441\u0442\u0432\u043e\u043c \u0442\u0430\u043a\u043e\u0433\u043e \u0440\u0435\u0448\u0435\u043d\u0438\u044f \u043f\u043e \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u044e \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \/dev\/random \u0438\u043b\u0438 \/dev\/urandom \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0435\u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u043d\u043e\u0441\u0442\u044c \u0430\u0442\u0430\u043a\u0430\u043c \u043d\u0430 \u0438\u0441\u0447\u0435\u0440\u043f\u0430\u043d\u0438\u0435 \u0444\u0430\u0439\u043b\u043e\u0432\u044b\u0445 \u0434\u0435\u0441\u043a\u0440\u0438\u043f\u0442\u043e\u0440\u043e\u0432, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043c\u043e\u0433\u0443\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043d\u0435\u0438\u043d\u0438\u0446\u0438\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u043c \u0438 \u043d\u0435\u0441\u043b\u0443\u0447\u0430\u0439\u043d\u044b\u043c \u043a\u0440\u0438\u043f\u0442\u043e\u0433\u0440\u0430\u0444\u0438\u0447\u0435\u0441\u043a\u0438\u043c \u043a\u043b\u044e\u0447\u0430\u043c. \u041f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u0430\u044f \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u044f \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u0430 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-116956","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\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\udd47Le d\u00e9veloppeur de Wireguard a consid\u00e9rablement acc\u00e9l\u00e9r\u00e9 l'appel \u00e0 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