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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-AU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>The hierarchy of RNGs will overcome some of the performance concerns. Only the root needs to call getrandom().<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>I do agree that having a DRBG at the root level is a good idea though.<o:p></o:p></span></p><p class=MsoNormal><span 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 style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Pauli<o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Sans Serif";color:#1F497D'>-- <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Sans Serif";color:#1F497D'>Oracle<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Sans Serif";color:#1F497D'>Dr Paul Dale | Cryptographer | Network Security & Encryption <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Sans Serif";color:#1F497D'>Phone +61 7 3031 7217<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Sans Serif";color:#1F497D'>Oracle Australia<o:p></o:p></span></p></div><p class=MsoNormal><span 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 lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext'>From:</span></b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext'> Salz, Rich via openssl-dev [mailto:openssl-dev@openssl.org] <br><b>Sent:</b> Wednesday, 28 June 2017 4:56 AM<br><b>To:</b> Kaduk, Ben <bkaduk@akamai.com>; openssl-dev@openssl.org; Matt Caswell <matt@openssl.org><br><b>Subject:</b> Re: [openssl-dev] Work on a new RNG for OpenSSL<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext'>For windows RAND_bytes should just call CryptGenRandom (or its equiv). For modern Linux, probably call getrandom(2). For OpenBSD call arc4random().<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext'>Getrandom() is a syscall, and I have concerns about the syscall performance. I would rather feed getrandom (or /dev/random if that’s not available) into a FIPS DRBG generator.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext'><o:p> </o:p></span></p></div></body></html>