Date: Fri, 8 Jun 2012 10:04:12 -0500 From: Mark Felder <feld@feld.me> To: freebsd-security@freebsd.org Cc: Dag-Erling =?ISO-8859-1?q?Sm=F8rgrav?= <des@des.no> Subject: Re: Default password hash Message-ID: <op.wflataye34t2sn@skeletor.feld.me> In-Reply-To: <86r4tqotjo.fsf@ds4.des.no> References: <86r4tqotjo.fsf@ds4.des.no>
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On Fri, 08 Jun 2012 07:51:55 -0500, Dag-Erling Smørgrav <des@des.no> wrote: > We still have MD5 as our default password hash, even though known-hash > attacks against MD5 are relatively easy these days. We've supported > SHA256 and SHA512 for many years now, so how about making SHA512 the > default instead of MD5, like on most Linux distributions? > > Index: etc/login.conf > =================================================================== > --- etc/login.conf (revision 236616) > +++ etc/login.conf (working copy) > @@ -23,7 +23,7 @@ > # AND SEMANTICS'' section of getcap(3) for more escape sequences). > > default:\ > - :passwd_format=md5:\ > + :passwd_format=sha512:\ > :copyright=/etc/COPYRIGHT:\ > :welcome=/etc/motd:\ > :setenv=MAIL=/var/mail/$,BLOCKSIZE=K,FTP_PASSIVE_MODE=YES:\ > > DES I strongly support this -- using either SHA-2 or Blowfish would be a great step forward. You'll also want to change the defuault for auth.conf so adduser picks it up. # # $FreeBSD: releng/9.0/etc/auth.conf 118103 2003-07-28 02:28:51Z rwatson $ # # Configure some authentication-related defaults. This file is being # gradually subsumed by user class and PAM configuration. # # crypt_default = md5 des
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