Honza's perspective » sha512 http://blog.stastnarodina.com/honza-en Tue, 20 Sep 2011 08:23:09 +0000 cs hourly 1 http://wordpress.org/?v=3.2.1 Ubuntu: change default encryption algorithm http://blog.stastnarodina.com/honza-en/spot/ubuntu-change-default-encryption-algorithm/ http://blog.stastnarodina.com/honza-en/spot/ubuntu-change-default-encryption-algorithm/#comments Sat, 11 Jul 2009 23:58:08 +0000 honza http://blog.stastnarodina.com/honza-en/?p=63 While fighting with DB2 denying logins I had to change the default hash algorithm used to store passwords in /etc/shadow. As far as I know (and as grep -i -r „sha512“ /etc/* tells me ), there are two files that carry this information. Namely /etc/pam.d/common-password and /etc/login.defs. To change the algorithm from sha512 (which shifts as the […]

]]> While fighting with DB2 denying logins I had to change the default hash algorithm used to store passwords in /etc/shadow.

As far as I know (and as grep -i -r "sha512" /etc/* tells me :-) ), there are two files that carry this information. Namely /etc/pam.d/common-password and /etc/login.defs.

To change the algorithm from sha512 (which shifts as the default in the new Ubuntu releases) change this:

/etc/pam.d/common-password

password [success=1 default=ignore] pam_unix.so obscure sha512

to

password [success=1 default=ignore] pam_unix.so obscure md5

/etc/login.defs

ENCRYPT_METHOD SHA512

to

ENCRYPT_METHOD MD5

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