{"id":112854,"date":"2024-01-12T15:10:27","date_gmt":"2024-01-12T13:10:27","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/proekt-openssh-opublikoval-plan-prekrashheniya-podderzhki-dsa"},"modified":"2024-01-12T15:10:27","modified_gmt":"2024-01-12T13:10:27","slug":"proekt-openssh-opublikoval-plan-prekrashheniya-podderzhki-dsa","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/proekt-openssh-opublikoval-plan-prekrashheniya-podderzhki-dsa","title":{"rendered":"Az OpenSSH projekt k\u00f6zz\u00e9tette DSA t\u00e1mogat\u00e1s\u00e1nak megsz\u00fcntet\u00e9si terv\u00e9t.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Az OpenSSH projekt fejleszt\u0151i bemutatt\u00e1k a DSA algoritmuson alapul\u00f3 kulcsok t\u00e1mogat\u00e1s\u00e1nak megsz\u00fcntet\u00e9s\u00e9re vonatkoz\u00f3 tervet. A mai m\u00e9rc\u00e9vel a DSA kulcsok nem ny\u00fajtanak megfelel\u0151 szint\u0171 v\u00e9delmet, mivel a titkos kulcs m\u00e9rete mind\u00f6ssze 160 bit, \u00e9s a SHA1 hash megfelel\u0151 biztons\u00e1gi szintje k\u00f6r\u00fclbel\u00fcl egy 80 bites szimmetrikus kulcsnak felel meg. <\/p>\n

Alap\u00e9rtelmez\u00e9s szerint a DSA kulcsok haszn\u00e1lata 2015-ben megsz\u0171nt, de a DSA t\u00e1mogat\u00e1sa opci\u00f3k\u00e9nt megmaradt, mivel ez az algoritmus az egyetlen k\u00f6telez\u0151en megval\u00f3s\u00edtand\u00f3 a SSHv2 protokollban. E k\u00f6vetelm\u00e9ny beker\u00fclt, mert a SSHv2 protokoll l\u00e9trehoz\u00e1sakor \u00e9s elfogad\u00e1sakor minden alternat\u00edv algoritmust szabadalmak v\u00e9dtek. Az\u00f3ta a helyzet megv\u00e1ltozott, a RSA szabadalmak megsz\u0171ntek, beker\u00fclt az ECDSA algoritmus, amely jelent\u0151sen fel\u00fclm\u00falja a DSA-t teljes\u00edtm\u00e9nyben \u00e9s biztons\u00e1gban, valamint az EdDSA, amely biztons\u00e1gosabb \u00e9s gyorsabb az ECDSA-n\u00e1l. A DSA t\u00e1mogat\u00e1s\u00e1nak folytat\u00e1s\u00e1nak egyetlen t\u00e9nyez\u0151je a r\u00e9gi eszk\u00f6z\u00f6kkel val\u00f3 kompatibilit\u00e1s fenntart\u00e1sa volt. <\/p>\n

A jelenlegi helyzet \u00e9rt\u00e9kel\u00e9se ut\u00e1n az OpenSSH fejleszt\u0151i arra a k\u00f6vetkeztet\u00e9sre jutottak, hogy a DSA nem biztons\u00e1gos algoritmus t\u00e1mogat\u00e1s\u00e1nak fenntart\u00e1s\u00e1nak k\u00f6lts\u00e9gei nem indokoltak, \u00e9s annak elt\u00e1vol\u00edt\u00e1sa \u00f6szt\u00f6n\u00f6zni fogja a DSA t\u00e1mogat\u00e1s\u00e1nak megsz\u00fcntet\u00e9s\u00e9t m\u00e1s SSH megval\u00f3s\u00edt\u00e1sokban \u00e9s kriptogr\u00e1fiai k\u00f6nyvt\u00e1rakban. Az \u00e1prilisi OpenSSH kiad\u00e1sban tervezik a DSA-val ell\u00e1tott build fenntart\u00e1s\u00e1t, de lehet\u0151s\u00e9get biztos\u00edtanak a DSA letilt\u00e1s\u00e1ra a ford\u00edt\u00e1s sor\u00e1n. A j\u00faniusi OpenSSH kiad\u00e1sban alap\u00e9rtelmezetten le lesz tiltva a DSA a build sor\u00e1n, \u00e9s 2025 elej\u00e9n a DSA megval\u00f3s\u00edt\u00e1st elt\u00e1vol\u00edtj\u00e1k a k\u00f3dalapb\u00f3l. <\/p>\n

A felhaszn\u00e1l\u00f3k, akiknek sz\u00fcks\u00e9g\u00fck van a DSA kliensoldali t\u00e1mogat\u00e1s\u00e1ra, alternat\u00edv OpenSSH kor\u00e1bbi \u00e1gainak \u00f6ssze\u00e1ll\u00edt\u00e1sait haszn\u00e1lhatj\u00e1k, p\u00e9ld\u00e1ul a Debian csomagban tal\u00e1lhat\u00f3 \u201eopenssh-client-ssh1\u201d-et, amely az OpenSSH 7.5 alapjaira \u00e9p\u00fclt, \u00e9s SSHv1 protokollal rendelkez\u0151 SSH-szerverekhez val\u00f3 csatlakoz\u00e1sra k\u00e9sz\u00fclt; a t\u00e1mogat\u00e1s\u00e1t az OpenSSH 7.6 m\u00e1r hat \u00e9ve megsz\u00fcntett\u00e9k.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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