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SSH Server and Hash algorithms
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alexm  
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 More options Jun 5 2012, 12:07 pm
Newsgroups: comp.security.ssh
From: alexm <al...@ndtel.com>
Date: Tue, 5 Jun 2012 11:07:40 -0500
Local: Tues, Jun 5 2012 12:07 pm
Subject: SSH Server and Hash algorithms
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I have a Centos 6.2 server freshly updated. It is authenticating
against an Ldap server, and I am having an issue with the hashing
algorithms being used by various utilities and servers.

First of all:

authconfig --test | grep hashing
password hashing algorithm is sha512

However, when I change a password using the passwd command, I see the
following:

smbldap-usershow al...@domain.com
dn: uid=al...@domain.com,ou=domain,o=ndtc
uid: al...@domain.com
cn: Alex M
mail: al...@domain.com
...
userPassword: {crypt}$1$kxH/MHL7$.51e8u0CooCalDaXsHSKD/

Crypt? OK, well, it's a crypt (MD5) password even though authconfig
says it'll be using sha512... But, I can log in using sshd.

Now, if I change the password using the smbpasswd utility, and rerun
the smbldap-usershow command:

dn: uid=al...@domain.com,ou=domain,o=ndtc
uid: al...@domain.com
cn: Alex
mail: al...@domain.com
...
userPassword: {SSHA}UGRSbhcFL0qLRdj6yWvqRidZPfIiBPYb

OK, now it's an SSHA (sha512) hash! BUT, I can no longer ssh to the server!

WTF??? Anyone have any insights into what I am missing here, and more
importantly, how I can fix it? I'd obviously rather use SSHA than
Crypt...

TIA!

Alex


 
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spazza  
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 More options Jun 5 2012, 1:35 pm
Newsgroups: comp.security.ssh
From: spazza <spa...@alum.com>
Date: Tue, 05 Jun 2012 19:35:39 +0200
Local: Tues, Jun 5 2012 1:35 pm
Subject: Re: SSH Server and Hash algorithms
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Il 05/06/2012 18.07, alexm ha scritto:

> ...
> userPassword: {SSHA}UGRSbhcFL0qLRdj6yWvqRidZPfIiBPYb

> OK, now it's an SSHA (sha512) hash! BUT, I can no longer ssh to the server!

It is a Salted SHA-1, not a SHA512.
I dont know if it  matter for your problem.

 
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alexm  
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 More options Jun 5 2012, 2:42 pm
Newsgroups: comp.security.ssh
From: alexm <al...@ndtel.com>
Date: Tue, 5 Jun 2012 13:42:07 -0500
Local: Tues, Jun 5 2012 2:42 pm
Subject: Re: SSH Server and Hash algorithms
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On 2012-06-05 17:35:39 +0000, spazza said:

> It is a Salted SHA-1, not a SHA512.
> I dont know if it  matter for your problem.

Curiouser and curiouser...

 
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