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</o:shapelayout></xml><![endif]--></head><body lang=RU link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hello,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Initially inspired by Péter Szabó work from 2017, but made with general approach:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span lang=EN-US style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Curve25519/Ed25519 implementation based on TweetNaCl version 20140427, old Google's curve25519_donna dropped as unnecessary, saves a lot of size.<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span lang=EN-US style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>SHA512 reused from LibTomCrypt, no need to keep own copy<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span lang=EN-US style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Sign/Verify require no additional memory allocation<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span lang=EN-US style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Dropbear's API made ~similar to LibTomCrypt devel to ease possible switch, if necessary. Anyway, LibTomCrypt is based on TweetNaCl as well.<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span lang=EN-US style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Default private key path is key/etc/dropbear/dropbear_ed25519_host_key<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span lang=EN-US style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Implemented general import from / export to OpenSSH private keys, can be reused for other key types on necessary<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span lang=EN-US style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Implemented *25519 fuzzers, but still need corresponding data from dropbear-fuzzcorpus <o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span lang=EN-US style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Man, license, commens updated to fit Ed25519<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>So far, DROPBEAR_CURVE25519 increases dropbear binary by ~2,5Kb on X86-64 vs ~8Kb of current curve25519_donna implementation.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>DROPBEAR_ED25519 adds ~7,5Kb to dropbear and ~1kB to dropbearconvert for OpenSSH import/export.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Related PR against current sources is here </span><a href="https://github.com/mkj/dropbear/pull/91"><span lang=EN-US>https://github.com/mkj/dropbear/pull/91</span></a><span lang=EN-US>, patches are attached.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Review and/or any suggestios will be highly appreciated.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;font-family:"Arial Narrow",sans-serif;mso-fareast-language:RU'>Thank you and<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;font-family:"Arial Narrow",sans-serif;mso-fareast-language:RU'>Best Regards, Vladislav Grishenko</span><span lang=EN-US style='font-size:9.0pt;mso-fareast-language:RU'><br><br><o:p></o:p></span></p></div></body></html>