{"id":147300,"date":"2025-11-04T23:11:54","date_gmt":"2025-11-04T21:11:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/programmno-apparatnaya-platforma-cheriot-1-0-dlya-povysheniya-bezopasnosti-koda-na-yazyke-si"},"modified":"2025-11-04T23:11:54","modified_gmt":"2025-11-04T21:11:54","slug":"programmno-apparatnaya-platforma-cheriot-1-0-dlya-povysheniya-bezopasnosti-koda-na-yazyke-si","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/programmno-apparatnaya-platforma-cheriot-1-0-dlya-povysheniya-bezopasnosti-koda-na-yazyke-si","title":{"rendered":"Programov\u011b-hardware platforma CHERIoT 1.0 pro zv\u00fd\u0161en\u00ed bezpe\u010dnosti k\u00f3du v jazyce C","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Byla p\u0159edstavena fin\u00e1ln\u00ed verze specifikace programov\u011b-hardware platformy CHERIoT 1.0 (Capability Hardware Extension to RISC-V for Internet of Things), definuj\u00edc\u00ed roz\u0161\u00ed\u0159en\u00ed instruk\u010dn\u00edho souboru (ISA) pro tvorbu zabezpe\u010den\u00fdch za\u0159\u00edzen\u00ed. CHERIoT poskytuje hardwarov\u00e9 mo\u017enosti pro sledov\u00e1n\u00ed p\u0159\u00edstupu k pam\u011bti, kontrolu spr\u00e1vnosti pr\u00e1ce s ukazateli a zaji\u0161t\u011bn\u00ed izolace blok\u016f k\u00f3du. Z\u00e1rove\u0148 byl zve\u0159ejn\u011bn stabiln\u00ed release referen\u010dn\u00ed form\u00e1ln\u00ed modelu CHERIoT ISA, definovan\u00e9ho v jazyce Sail. V\u00fdsledky projektu jsou distribuov\u00e1ny pod licenc\u00ed BSD.      <\/p>\n<p>Projekt CHERIoT byl vytvo\u0159en spole\u010dnost\u00ed Microsoft pro \u0159e\u0161en\u00ed probl\u00e9m\u016f s bezpe\u010dnost\u00ed v existuj\u00edc\u00edm k\u00f3du v jazyc\u00edch C a C++ a pro ochranu takov\u00e9ho k\u00f3du bez nutnosti jeho p\u0159ed\u011bl\u00e1n\u00ed. Ochrana je realizov\u00e1na prost\u0159ednictv\u00edm modifikovan\u00e9ho kompil\u00e1toru, kter\u00fd pou\u017e\u00edv\u00e1 roz\u0161\u00ed\u0159enou sadu procesorov\u00fdch instrukc\u00ed (ISA) pro zaji\u0161t\u011bn\u00ed integrity ukazatel\u016f, kontroly hranic p\u0159i pr\u00e1ci s pam\u011bt\u00ed a prevence p\u0159\u00edstupu k uvoln\u011bn\u00e9 pam\u011bti. V roce 2023 byly v\u00fdsledky CHERIoT zp\u0159\u00edstupn\u011bny a p\u0159etvo\u0159eny na spole\u010dn\u00fd projekt, do kter\u00e9ho se p\u0159ipojily i dal\u0161\u00ed spole\u010dnosti.     <\/p>\n<p>Hardwarov\u00e9 komponenty CHERIoT jsou navr\u017eeny jako mikrokontrol\u00e9r zalo\u017een\u00fd na architektu\u0159e RISC-V, realizuj\u00edc\u00ed zabezpe\u010denou procesorovou architekturu CHERI (Capability Hardware Extension to RISC-V) s modelem \u0159\u00edzen\u00e9ho p\u0159\u00edstupu k pam\u011bti zalo\u017een\u00fdm na \u201ecapability\u201c (ka\u017ed\u00e1 operace \u010dten\u00ed a z\u00e1pisu do pam\u011bti je autorizov\u00e1na). Na z\u00e1klad\u011b architektury sady p\u0159\u00edkaz\u016f (ISA) poskytovan\u00e9 v CHERIoT je vybudov\u00e1n softwarov\u00fd model, kter\u00fd zaru\u010duje bezpe\u010dnost pr\u00e1ce s pam\u011bt\u00ed na \u00farovni jednotliv\u00fdch objekt\u016f, poskytuje ochranu p\u0159ed p\u0159\u00edstupem k ji\u017e uvoln\u011bn\u00e9 pam\u011bti a realizuje lehk\u00fd syst\u00e9m izolace p\u0159\u00edstupu k pam\u011bti.     <\/p>\n<p>Uveden\u00fd model softwarov\u00e9 ochrany se p\u0159\u00edmo prom\u00edt\u00e1 do jazykov\u00e9ho modelu C\/C++, co\u017e umo\u017e\u0148uje jeho aplikaci pro st\u00e1vaj\u00edc\u00ed aplikace, u nich\u017e je pro ochranu t\u0159eba pouze p\u0159ekompilace a spu\u0161t\u011bn\u00ed na hardwaru podporuj\u00edc\u00edm ISA CHERIoT. Nap\u0159\u00edklad pou\u017eit\u00ed CHERIoT umo\u017e\u0148uje bez nutnosti zm\u011bn v k\u00f3du realizovat automatickou kontrolu hranic, sledov\u00e1n\u00ed doby \u017eivota oblast\u00ed pam\u011bti a zaji\u0161t\u011bn\u00ed integrity ukazatel\u016f v komponent\u00e1ch zpracov\u00e1vaj\u00edc\u00edch ned\u016fv\u011bryhodn\u00e1 data.      <\/p>\n<p>Mezi probl\u00e9my, kter\u00e9 jsou blokov\u00e1ny pomoc\u00ed CHERIoT:  <\/p>\n<ul>\n<li class=\"l\"> P\u0159ekro\u010den\u00ed hranic objektu v pam\u011bti;\n<li class=\"l\"> Zam\u011bn\u011bn\u00ed ukazatel\u016f (p\u0159i pou\u017eit\u00ed CHERIoT mus\u00ed b\u00fdt v\u0161echny ukazatele odvozeny od ji\u017e existuj\u00edc\u00edch ukazatel\u016f);\n<li class=\"l\"> P\u0159\u00edstup do pam\u011bti po uvoln\u011bn\u00ed (jak\u00fdkoli p\u0159\u00edstup k pam\u011bti prost\u0159ednictv\u00edm nespr\u00e1vn\u00e9ho ukazatele nebo ukazatele, kter\u00fd odkazuje na uvoln\u011bn\u00fd objekt, vede p\u0159i pou\u017eit\u00ed CHERIoT k vyvol\u00e1n\u00ed v\u00fdjimky).  <\/ul>\n<p>Krom\u011b specifikace a form\u00e1ln\u00edho modelu vyv\u00edj\u00ed projekt referen\u010dn\u00ed implementaci 32bitov\u00e9ho RISC-V CPU Ibex s podporou ISA CHERIoT a modifikovan\u00fd n\u00e1stroj LLVM. Sch\u00e9mata prototypu CPU a popisy hardwarov\u00fdch blok\u016f ve Verilogu jsou \u0161\u00ed\u0159eny pod licenc\u00ed Apache 2.0. Jako z\u00e1klad pro CPU bylo pou\u017eito j\u00e1dro Ibex z projektu lowRISC. Na z\u00e1klad\u011b j\u00e1dra CHERIoT se p\u0159ipravuj\u00ed k hromadn\u00e9 v\u00fdrob\u011b \u010dipy ICENI, jejich\u017e uveden\u00ed na trh je pl\u00e1nov\u00e1no na p\u0159\u00ed\u0161t\u00ed rok. Spole\u010dnost Microsoft tak\u00e9 vyv\u00edj\u00ed mikrokontrol\u00e9r Kudu s podporou ISA CHERIoT. Ibex a Kudu ji\u017e pln\u011b podporuj\u00ed specifikaci CHERIoT 1.0. Pracuje se na standardizaci CHERI-roz\u0161\u00ed\u0159en\u00ed pro procesory RISC-V v organizaci RISC-V International.      <\/p>\n<p>D\u00e1le se vyv\u00edj\u00ed emul\u00e1tor platformy na b\u00e1zi FPGA a Docker kontejner pro v\u00fdvoj\u00e1\u0159e s p\u0159edinstalovan\u00fdm n\u00e1strojem a simul\u00e1torem CPU Ibex, realizovan\u00fdm pomoc\u00ed Verilatoru. Krom\u011b toho byl na z\u00e1klad\u011b CHERIoT p\u0159ipraven prototyp opera\u010dn\u00edho syst\u00e9mu re\u00e1ln\u00e9ho \u010dasu CHERIoT RTOS, kter\u00fd umo\u017e\u0148uje izolaci compartment\u016f i na vestav\u011bn\u00fdch syst\u00e9mech s 256 MB RAM. K\u00f3d CHERIoT RTOS je naps\u00e1n v jazyce C++ a je \u0161\u00ed\u0159en pod licenc\u00ed MIT. Z\u00e1kladn\u00ed komponenty opera\u010dn\u00edho syst\u00e9mu, jako jsou bootloader, pl\u00e1nova\u010d a syst\u00e9m distribuce pam\u011bti, jsou strukturov\u00e1ny ve form\u011b compartment\u016f.     <\/p>\n<p>Kompartiment v CHERIoT RTOS p\u0159edstavuje izolovanou kombinaci k\u00f3du a glob\u00e1ln\u00edch prom\u011bnn\u00fdch, kter\u00e1 p\u0159ipom\u00edn\u00e1 sd\u00edlenou knihovnu, ale na rozd\u00edl od n\u00ed m\u016f\u017ee m\u011bnit sv\u016fj stav (mutable) a spou\u0161t\u011bt se v odd\u011blen\u00e9m bezpe\u010dnostn\u00edm kontextu. \u017d\u00e1dn\u00fd k\u00f3d zven\u010d\u00ed nem\u016f\u017ee p\u0159edat \u0159\u00edzen\u00ed k\u00f3du v kompartimentu a z\u00edskat p\u0159\u00edstup k objekt\u016fm, krom\u011b vol\u00e1n\u00ed speci\u00e1ln\u011b definovan\u00fdch vstupn\u00edch bod\u016f a pou\u017e\u00edv\u00e1n\u00ed ukazatel\u016f na objekty, kter\u00e9 byly v\u00fdslovn\u011b p\u0159ed\u00e1ny p\u0159i vol\u00e1n\u00ed jin\u00e9ho kompartimentu. Pro k\u00f3d a glob\u00e1ln\u00ed objekty v kompartimentu je zaru\u010dena integrita a d\u016fv\u011brnost.<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=64180\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0444\u0438\u043d\u0430\u043b\u044c\u043d\u044b\u0439 \u0432\u0430\u0440\u0438\u0430\u043d\u0442 \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0439-\u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b CHERIoT 1.0 (Capability Hardware Extension to RISC-V for Internet of Things), \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u044e\u0449\u0435\u0439 \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u0435 \u043d\u0430\u0431\u043e\u0440\u0430 \u043a\u043e\u043c\u0430\u043d\u0434 (ISA) \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0437\u0430\u0449\u0438\u0449\u0451\u043d\u043d\u044b\u0445 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432. CHERIoT \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u044b\u0435 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u0434\u043b\u044f \u043e\u0442\u0441\u043b\u0435\u0436\u0438\u0432\u0430\u043d\u0438\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u043f\u0430\u043c\u044f\u0442\u0438, \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e\u0441\u0442\u0438 \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u0443\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044f\u043c\u0438 \u0438 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u0438 \u0431\u043b\u043e\u043a\u043e\u0432 \u043a\u043e\u0434\u0430. \u041e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u044b\u0439 \u0440\u0435\u043b\u0438\u0437 \u044d\u0442\u0430\u043b\u043e\u043d\u043d\u043e\u0439 \u0444\u043e\u0440\u043c\u0430\u043b\u044c\u043d\u043e\u0439 \u043c\u043e\u0434\u0435\u043b\u0438 CHERIoT ISA, \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u043e\u0439 [&hellip;]<\/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-147300","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=\"\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0444\u0438\u043d\u0430\u043b\u044c\u043d\u044b\u0439 \u0432\u0430\u0440\u0438\u0430\u043d\u0442 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