[Spce-user] Hide customer password in Kamailio DB

[Marc Storck]

Unfortunately that's not completely correct.

You can not only check but also generate a correct authentication with the unencrypted HASH values.

So the storing HA1 and HA1_2 in the DB is no better than storing the password in DB. The only difference is that HA1 and HA1_2 don't reveal the underlying password.

If someone has access to your DB that someone can use the HA1 and HA1_2 values to authenticate correctly against you system and make fraudulent calls.

Which is why I also call the HASH values "unencrypted".

Regards,

Marc
________________________________
From: Spce-user [spce-user-bounces at lists.sipwise.com] on behalf of Raúl Alexis Betancor Santana [rabs at dimension-virtual.com]
Sent: Thursday, April 30, 2015 18:11
To: <spce-user at lists.sipwise.com>
Subject: Re: [Spce-user] Hide customer password in Kamailio DB

Marc,

HA1 and HA1_2 are not 'unencrypted' text ... they are HASH values, generated from the user URI, the REALM and the PASSWORD ... your could not use the HA1 and HA1_2 values for anything than 'check' if the sended (by the SIP UA) credentials are Ok, you could not use them to 'know' the unencrypted password.

Best regards

________________________________
De: "Marc Storck" <mstorck at voipgate.com>
Para: "<spce-user at lists.sipwise.com>" <spce-user at lists.sipwise.com>
Enviados: Jueves, 30 de Abril 2015 12:57:35
Asunto: Re: [Spce-user] Hide customer password in Kamailio DB
What is the difference from reading the plain text (unencrypted) password or reading the plain text (unencrypted) HA1 and HA1_2 values from DB?

AFAIK, an attacker, who was able to read either of them from your DB, can use those values to correctly authenticate to the SPCE in any case.

On 30 Apr 2015, at 13:45, Mathys Frédéric <frederic.mathys at nagra.com<mailto:frederic.mathys at nagra.com>> wrote:
Hello,

When creating a new user, by default the password is saved in plaintext in the DB, column “password”. For obvious security reasons, I’d like to remove the password in this column and use only ha1 and ha1b values. To do that, I modified the “auth_db” module configuration :

/etc/kamailio/proxy/kamailio.cfg
modparam("auth_db", "use_domain", 1)
modparam("auth_db", "calculate_ha1", 0)
modparam("auth_db", "password_column", "ha1")
modparam("auth_db", "password_column_2", "ha1_2")

Then, I removed the password for all users in the DB, and everyone seems able to connect with this configuration. My problem is now when I create a new user, the password is automatically saved in plaintext and I don’t want that. So I tried to modify “kamctlrc” by adding the following line :

/etc/kamailio/proxy/kamctlrc and /etc/kamailio/lb/kamctlrc
STORE_PLAINTEXT_PW=0

This has no effect, what should I do to disable that?

Thank you

Frederic Mathys
System Integration & Validation Engineer
P Please consider the environment - do you really need to print this email ?

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