Re: [Dovecot] Storing passwords encrypted... bcrypt?

2012-01-05 Thread Pascal Volk
On 01/05/2012 12:31 PM Charles Marcus wrote: > … > You said above that 'yes, I can use it with dovecot' - but what about > postfix and mysql... where/how do they fit into this mix? My thought was > that there are two issues here: > > 1. Storing them in bcrypted form, and For MySQL the bcrypted

Re: [Dovecot] Storing passwords encrypted... bcrypt?

2012-01-05 Thread Willie Gillespie
On 01/05/2012 11:36 AM, Charles Marcus wrote: On 2012-01-05 11:21 AM, Willie Gillespie wrote: If the phone knows the password and I have the phone, then I have the password. Similarly, if I compromise the workstation that knows the password, then I also have the password. Interesting... I tho

Re: [Dovecot] Storing passwords encrypted... bcrypt?

2012-01-05 Thread David Ford
On 01/05/2012 01:37 PM, Charles Marcus wrote: > On 2012-01-05 11:31 AM, Michael Orlitzky wrote: >> Ugh, sorry. I went to the link that someone else quoted: >> >>https://www.grc.com/haystack.htm > >> Gibson*is* a renowned crackpot. > > Don't know about that, but I do know from long experience

Re: [Dovecot] Storing passwords encrypted... bcrypt?

2012-01-05 Thread Charles Marcus
On 2012-01-05 11:31 AM, Michael Orlitzky wrote: Ugh, sorry. I went to the link that someone else quoted: https://www.grc.com/haystack.htm Gibson*is* a renowned crackpot. Don't know about that, but I do know from long experience Spinrite rocks! Maybe -- Best regards, Charles

Re: [Dovecot] Storing passwords encrypted... bcrypt?

2012-01-05 Thread Charles Marcus
On 2012-01-05 11:21 AM, Willie Gillespie wrote: If the phone knows the password and I have the phone, then I have the password. Similarly, if I compromise the workstation that knows the password, then I also have the password. Interesting... I thought they were stored encrypted. I definitely u

[Dovecot] Strange error: DIGEST-MD5 mechanism can't be supported with given passdbs

2012-01-05 Thread Yubao Liu
Hi all, I have no idea about that message, here is my configuration, what's wrong? Debian testing, Dovecot 2.0.15 $ doveconf -n # 2.0.15: /etc/dovecot/dovecot.conf # OS: Linux 3.1.0-1-686-pae i686 Debian wheezy/sid auth_default_realm = corp.example.com auth_krb5_keytab = /etc/dovecot.keytab aut

Re: [Dovecot] Storing passwords encrypted... bcrypt?

2012-01-05 Thread Michael Orlitzky
On 01/05/12 11:14, Charles Marcus wrote: > > Ummm... yes, he does... from tfa: > > "Salts Will Not Help You > > It’s important to note that salts are useless for preventing dictionary > attacks or brute force attacks. You can use huge salts or many salts or > hand-harvested, shade-grown, organic

Re: [Dovecot] Storing passwords encrypted... bcrypt?

2012-01-05 Thread Willie Gillespie
On 1/5/2012 9:14 AM, Charles Marcus wrote: On 2012-01-05 10:28 AM, Michael Orlitzky wrote: On 01/05/12 06:26, Charles Marcus wrote: You realize they're just walking around with a $400 post-it note with the password written on it, right? Nope, you are wrong - as I have patiently explained be

Re: [Dovecot] Storing passwords encrypted... bcrypt?

2012-01-05 Thread Charles Marcus
On 2012-01-05 10:28 AM, Michael Orlitzky wrote: On 01/05/12 06:26, Charles Marcus wrote: To prevent rainbow table attacks, salt your passwords. You can make them a little bit more difficult in plenty of ways, but salt is the /solution/. Go read that link (you obviously didn't yet, because he

Re: [Dovecot] Storing passwords encrypted... bcrypt?

2012-01-05 Thread Michael Orlitzky
On 01/05/12 10:28, Michael Orlitzky wrote: >> >> Nope, you are wrong - as I have patiently explained before. They do not >> *need* to write their password down. >> > > They have them written down on their phones. If someone gets a hold of > the phone, he can just read the password off of it. I sh

Re: [Dovecot] Storing passwords encrypted... bcrypt?

2012-01-05 Thread Michael Orlitzky
On 01/04/12 21:06, Patrick Domack wrote: > > But still, the results are all the same, if they get the hash, it can be > broken, given time. Using more cpu expensive methods make it take longer > (like adding salt, more complex hash). But the end result is they will > have it if they want it. > U

Re: [Dovecot] Storing passwords encrypted... bcrypt?

2012-01-05 Thread Michael Orlitzky
On 01/05/12 06:26, Charles Marcus wrote: > >> To prevent rainbow table attacks, salt your passwords. You can make them >> a little bit more difficult in plenty of ways, but salt is the >> /solution/. > > Go read that link (you obviously didn't yet, because he claims that > salting passwords is ne

Re: [Dovecot] Storing passwords encrypted... bcrypt?

2012-01-05 Thread Patrick Domack
Quoting Noel Butler : On Thu, 2012-01-05 at 04:05 +0100, Pascal Volk wrote: On 01/05/2012 03:36 AM Noel Butler wrote: > > Because with multiple servers, we store them all in (replicated) > mysql :) (the same with postfix/dovecot). > and as I'm sure you are aware, Apache does not understand s

Re: [Dovecot] Storing passwords encrypted... bcrypt?

2012-01-05 Thread Charles Marcus
On 2012-01-04 8:19 PM, Pascal Volk wrote: On 01/03/2012 09:40 PM Charles Marcus wrote: Hi everyone, Was just perusing this article about how trivial it is to decrypt passwords that are stored using most (standard) encryption methods (like MD5), and was wondering - is it possible to use bcrypt

Re: [Dovecot] Storing passwords encrypted... bcrypt?

2012-01-05 Thread Charles Marcus
On 2012-01-03 8:58 PM, Michael Orlitzky wrote: On 01/03/2012 08:25 PM, Charles Marcus wrote: What I'm worried about is the worst case scenario of someone getting ahold of the entire user database of *stored* passwords, where they can then take their time and brute force them at their leisure, o

Re: [Dovecot] Storing passwords encrypted... bcrypt?

2012-01-05 Thread Charles Marcus
On 2012-01-03 8:37 PM, David Ford wrote: part of my point along that of brute force resistance, is that when security becomes onerous to the typical user such as requiring non-repeat passwords of "10 characters including punctuation and mixed case", even stalwart policy followers start tending t

Re: [Dovecot] dovecot-lda error

2012-01-05 Thread e-frog
On 05.01.2012 08:45, wrote Wesley M.: Hi, Hi, I use Dovecot 2.0.13 on OpenBSD 5.0 When i try to send emails i have the following error in /var/log/maillog Jan 5 11:23:49 mail50 postfix/pipe[29423]: D951842244C: to=, relay=dovecot, delay=0.02, delays=0.01/0/0/0.01, dsn=5.3.0, status=bounce