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</o:shapelayout></xml><![endif]--></head><body lang=RU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Hi, Matt<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Thank you very much for merging.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>There’s additional minor patch <a href="https://github.com/mkj/dropbear/pull/94">https://github.com/mkj/dropbear/pull/94</a> that adds Ed25519 mentions in dropbearkey.1 man.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;font-family:"Arial Narrow",sans-serif;color:#1F497D'>Best Regards, Vladislav Grishenko</span><span lang=EN-US style='font-size:9.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p></o:p></span></p></div><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Matt Johnston <matt@ucc.asn.au> <br><b>Sent:</b> Wednesday, March 11, 2020 9:16 PM<br><b>To:</b> Vladislav Grishenko <themiron.ru@gmail.com><br><b>Cc:</b> dropbear@ucc.asn.au<br><b>Subject:</b> Re: [PATCH] Add Ed25519 keys support<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank you Vladislav, I've merged this now via github, <a href="https://secure.ucc.asn.au/hg/dropbear/rev/d32bcb5c557d">https://secure.ucc.asn.au/hg/dropbear/rev/d32bcb5c557d</a><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>It's a nice clean and thorough implementation.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Cheers,<o:p></o:p></p></div><div><p class=MsoNormal>Matt <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><div><p class=MsoNormal><br><br><o:p></o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>On Fri 6/3/2020, at 10:45 pm, Vladislav Grishenko <<a href="mailto:themiron.ru@gmail.com">themiron.ru@gmail.com</a>> wrote:<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Hello,</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> </span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Initially inspired by Péter Szabó work from 2017, but made with general approach:</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> </span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div style='margin-left:36.0pt'><p class=MsoNormal style='text-indent:-18.0pt'><span lang=EN-US style='font-size:11.0pt;font-family:Symbol'>·</span><span lang=EN-US style='font-size:7.0pt'> <span class=apple-converted-space> </span></span><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Curve25519/Ed25519 implementation based on TweetNaCl version 20140427, old Google's curve25519_donna dropped as unnecessary, saves a lot of size.</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div style='margin-left:36.0pt'><p class=MsoNormal style='text-indent:-18.0pt'><span lang=EN-US style='font-size:11.0pt;font-family:Symbol'>·</span><span lang=EN-US style='font-size:7.0pt'> <span class=apple-converted-space> </span></span><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>SHA512 reused from LibTomCrypt, no need to keep own copy</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div style='margin-left:36.0pt'><p class=MsoNormal style='text-indent:-18.0pt'><span lang=EN-US style='font-size:11.0pt;font-family:Symbol'>·</span><span lang=EN-US style='font-size:7.0pt'> <span class=apple-converted-space> </span></span><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Sign/Verify require no additional memory allocation</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div style='margin-left:36.0pt'><p class=MsoNormal style='text-indent:-18.0pt'><span lang=EN-US style='font-size:11.0pt;font-family:Symbol'>·</span><span lang=EN-US style='font-size:7.0pt'> <span class=apple-converted-space> </span></span><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Dropbear's API made ~similar to LibTomCrypt devel to ease possible switch, if necessary. Anyway, LibTomCrypt is based on TweetNaCl as well.</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div style='margin-left:36.0pt'><p class=MsoNormal style='text-indent:-18.0pt'><span lang=EN-US style='font-size:11.0pt;font-family:Symbol'>·</span><span lang=EN-US style='font-size:7.0pt'> <span class=apple-converted-space> </span></span><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Default private key path is key/etc/dropbear/dropbear_ed25519_host_key</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div style='margin-left:36.0pt'><p class=MsoNormal style='text-indent:-18.0pt'><span lang=EN-US style='font-size:11.0pt;font-family:Symbol'>·</span><span lang=EN-US style='font-size:7.0pt'> <span class=apple-converted-space> </span></span><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Implemented general import from / export to OpenSSH private keys, can be reused for other key types on necessary</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div style='margin-left:36.0pt'><p class=MsoNormal style='text-indent:-18.0pt'><span lang=EN-US style='font-size:11.0pt;font-family:Symbol'>·</span><span lang=EN-US style='font-size:7.0pt'> <span class=apple-converted-space> </span></span><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Implemented *25519 fuzzers, but still need corresponding data from dropbear-fuzzcorpus<span class=apple-converted-space> </span></span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div style='margin-left:36.0pt'><p class=MsoNormal style='text-indent:-18.0pt'><span lang=EN-US style='font-size:11.0pt;font-family:Symbol'>·</span><span lang=EN-US style='font-size:7.0pt'> <span class=apple-converted-space> </span></span><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Man, license, commens updated to fit Ed25519</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> </span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>So far, DROPBEAR_CURVE25519 increases dropbear binary by ~2,5Kb on X86-64 vs ~8Kb of current curve25519_donna implementation.</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>DROPBEAR_ED25519 adds ~7,5Kb to dropbear and ~1kB to dropbearconvert for OpenSSH import/export.</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> </span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Related PR against current sources is here<span class=apple-converted-space> </span></span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><a href="https://github.com/mkj/dropbear/pull/91"><span lang=EN-US style='color:#954F72'>https://github.com/mkj/dropbear/pull/91</span></a></span><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>, patches are attached.</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Review and/or any suggestios will be highly appreciated.</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> </span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;font-family:"Arial Narrow",sans-serif'>Thank you and</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;font-family:"Arial Narrow",sans-serif'>Best Regards, Vladislav Grishenko</span><span lang=EN-US style='font-size:9.0pt;font-family:"Calibri",sans-serif'><br><br><br></span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p></div><p class=MsoNormal><0001-Add-support-for-Ed25519-as-a-public-key-type.patch><0002-Add-curve25519-and-ed25519-fuzzers.patch><0003-Add-import-and-export-of-Ed25519-keys.patch><o:p></o:p></p></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>