Byl zve\u0159ejn\u011bn vyd\u00e1n\u00ed OpenSSH 9.7, otev\u0159en\u00e9 implementace klienta a serveru pro pr\u00e1ci s protokoly SSH 2.0 a SFTP. V navrhovan\u00e9 verzi za\u010dalo zav\u00e1d\u011bn\u00ed zm\u011bn, kter\u00e9 p\u0159edch\u00e1zej\u00ed budouc\u00edmu ukon\u010den\u00ed podpory kl\u00ed\u010d\u016f na b\u00e1zi DSA algoritmu. V OpenSSH 9.7 je k dispozici mo\u017enost vypnout DSA v pr\u016fb\u011bhu kompilace, ale v\u00fdchoz\u00ed sestaven\u00ed prozat\u00edm podporu DSA zachov\u00e1v\u00e1. V n\u00e1sleduj\u00edc\u00edm vyd\u00e1n\u00ed, kter\u00e9 je pl\u00e1nov\u00e1no na \u010derven, se re\u017eim sestaven\u00ed zm\u011bn\u00ed tak, aby byla podpora DSA ve v\u00fdchoz\u00edm nastaven\u00ed vypnuta, a na za\u010d\u00e1tku roku 2025 bude implementace DSA odstran\u011bna z k\u00f3dov\u00e9 z\u00e1kladny. <\/p>\n
Ve v\u00fdchoz\u00edm nastaven\u00ed bylo pou\u017e\u00edv\u00e1n\u00ed DSA kl\u00ed\u010d\u016f ukon\u010deno ji\u017e v roce 2015, ale k\u00f3d pro podporu DSA byl sestavov\u00e1n jako v\u00fdchoz\u00ed a umo\u017e\u0148oval vr\u00e1tit DSA prost\u0159ednictv\u00edm nastaven\u00ed. Je pozoruhodn\u00e9, \u017ee algoritmus DSA je jedin\u00fdm povinn\u011b implementovan\u00fdm v protokolu SSHv2. Tento po\u017eadavek byl p\u0159id\u00e1n, proto\u017ee p\u0159i vytv\u00e1\u0159en\u00ed a schvalov\u00e1n\u00ed protokolu SSHv2 spadaly v\u0161echny alternativn\u00ed algoritmy pod platnost patent\u016f. Od t\u00e9 doby se situace zm\u011bnila, patenty vztahuj\u00edc\u00ed se k RSA vypr\u0161ely, byl p\u0159id\u00e1n algoritmus ECDSA, kter\u00fd v\u00fdkonnostn\u011b a bezpe\u010dnostn\u011b v\u00fdrazn\u011b p\u0159ed\u010d\u00ed DSA, a tak\u00e9 EdDSA, kter\u00fd je bezpe\u010dn\u011bj\u0161\u00ed a rychlej\u0161\u00ed ne\u017e ECDSA. <\/p>\n
Jedn\u00edm z d\u016fvod\u016f pokra\u010dov\u00e1n\u00ed podpory DSA byla snaha o zachov\u00e1n\u00ed kompatibility se zastaral\u00fdmi za\u0159\u00edzen\u00edmi. V sou\u010dasn\u00e9 dob\u011b n\u00e1klady na pokra\u010dov\u00e1n\u00ed podpory nebezpe\u010dn\u00e9ho algoritmu DSA neospravedl\u0148uj\u00ed jeho existenci a jeho odstran\u011bn\u00ed podpo\u0159\u00ed ukon\u010den\u00ed podpory DSA v jin\u00fdch implementac\u00edch SSH a kryptografick\u00fdch knihovn\u00e1ch. <\/p>\n
Krom\u011b zm\u011bn souvisej\u00edc\u00edch s DSA nov\u00e1 verze nab\u00edz\u00ed nov\u00fd typ timeoutu pro ssh a sshd, kter\u00fd se aktivuje pomoc\u00ed hodnoty «global» v direkci ChannelTimeout. V nov\u00e9m re\u017eimu OpenSSH sleduje v\u0161echny otev\u0159en\u00e9 kan\u00e1ly a uzav\u00edr\u00e1 je najednou, pokud ve v\u0161ech z nich b\u011bhem stanoven\u00e9ho \u010dasov\u00e9ho obdob\u00ed nedoch\u00e1zelo k \u017e\u00e1dn\u00e9mu provozu. Nap\u0159\u00edklad, kdy\u017e jsou na hostiteli sou\u010dasn\u011b otev\u0159eny kan\u00e1ly pro SSH relaci a p\u0159esm\u011brov\u00e1n\u00ed x11, nov\u00fd re\u017eim umo\u017e\u0148uje uzav\u0159\u00edt oba kan\u00e1ly, pokud jsou neaktivn\u00ed, m\u00edsto aby se sledovaly timeouty pro ka\u017ed\u00fd kan\u00e1l zvl\u00e1\u0161\u0165. Mezi zm\u011bnami je tak\u00e9 v\u00fdrazn\u00e9 zlep\u0161en\u00ed testov\u00e1n\u00ed kompatibility s projektem PuTTY. \u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 OpenSSH 9.7, \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u0438 \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u043f\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430\u043c SSH 2.0 \u0438 SFTP. \u0412 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u043d\u0430\u0447\u0430\u043b\u043e\u0441\u044c \u0432\u043d\u0435\u0441\u0435\u043d\u0438\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439, \u043f\u0440\u0435\u0434\u0448\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u0431\u0443\u0434\u0443\u0449\u0435\u043c\u0443 \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0435\u043d\u0438\u044e \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u043a\u043b\u044e\u0447\u0435\u0439 \u043d\u0430 \u0431\u0430\u0437\u0435 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0430 DSA. \u0412 OpenSSH 9.7 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0430 \u043e\u043f\u0446\u0438\u044f \u0434\u043b\u044f \u043e\u0442\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f DSA \u043d\u0430 \u0441\u0442\u0430\u0434\u0438\u0438 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u0438, \u043d\u043e \u0441\u0431\u043e\u0440\u043a\u0430 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0441 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u043e\u0439 DSA \u043f\u043e\u043a\u0430 \u0441\u043e\u0445\u0440\u0430\u043d\u0435\u043d\u0430. \u0412 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u043c \u0432\u044b\u043f\u0443\u0441\u043a\u0435, […]<\/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-114258","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\udd47Verze OpenSSH 9.7 | ProHoster","description":"Byl zve\u0159ejn\u011bn vyd\u00e1n\u00ed OpenSSH 9.7, otev\u0159en\u00e9 implementace klienta a serveru pro pr\u00e1ci s protokoly SSH 2.0 a SFTP.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/reliz-openssh-9-7","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","og:site_name":"ProHoster | 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Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"