Re: TOTP authentication with the TOTP module

Hi Alan

Thanks. Sorry im absolutely new to freeradius.

Now i changed in the config to
  Auth-Type PAP {
        totp
    }

and reconfigured the vncserver to use PAP and now I got this error:

Ready to process requests
(0) Received Access-Request Id 83 from 192.168.65.161:58717 to
192.168.65.160:1812 length 71
(0)   NAS-Identifier = "vncserver"
(0)   User-Name = "bw"
(0)   User-Password = "302427"
(0)   Message-Authenticator = 0xa8aeb49defe09e2a13087975576d4754
(0) # Executing section authorize from file
/etc/freeradius/3.0/sites-enabled/default
(0)   authorize {
(0)     policy filter_username {
(0)       if (&User-Name) {
(0)       if (&User-Name)  -> TRUE
(0)       if (&User-Name)  {
(0)         if (&User-Name =~ / /) {
(0)         if (&User-Name =~ / /)  -> FALSE
(0)         if (&User-Name =~ /@[^@]*@/ ) {
(0)         if (&User-Name =~ /@[^@]*@/ )  -> FALSE
(0)         if (&User-Name =~ /\.\./ ) {
(0)         if (&User-Name =~ /\.\./ )  -> FALSE
(0)         if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/))  {
(0)         if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/))   ->
FALSE
(0)         if (&User-Name =~ /\.$/)  {
(0)         if (&User-Name =~ /\.$/)   -> FALSE
(0)         if (&User-Name =~ /@\./)  {
(0)         if (&User-Name =~ /@\./)   -> FALSE
(0)       } # if (&User-Name)  = notfound
(0)     } # policy filter_username = notfound
(0)     [preprocess] = ok
(0)     [chap] = noop
(0)     [mschap] = noop
(0)     [digest] = noop
(0) suffix: Checking for suffix after "@"
(0) suffix: No '@' in User-Name = "bw", looking up realm NULL
(0) suffix: No such realm "NULL"
(0)     [suffix] = noop
(0) eap: No EAP-Message, not doing EAP
(0)     [eap] = noop
(0) files: users: Matched entry bw at line 1
(0)     [files] = ok
(0)     [expiration] = noop
(0)     [logintime] = noop
(0) pap: WARNING: No "known good" password found for the user.  Not setting
Auth-Type
(0) pap: WARNING: Authentication will fail unless a "known good" password
is available
(0)     [pap] = noop
(0)   } # authorize = ok
(0) ERROR: No Auth-Type found: rejecting the user via Post-Auth-Type =
Reject
(0) Failed to authenticate the user
(0) Using Post-Auth-Type Reject
(0) # Executing group from file /etc/freeradius/3.0/sites-enabled/default
(0)   Post-Auth-Type REJECT {
(0) attr_filter.access_reject: EXPAND %{User-Name}
(0) attr_filter.access_reject:    --> bw
(0) attr_filter.access_reject: Matched entry DEFAULT at line 11
(0)     [attr_filter.access_reject] = updated
(0)     [eap] = noop
(0)     policy remove_reply_message_if_eap {
(0)       if (&reply:EAP-Message && &reply:Reply-Message) {
(0)       if (&reply:EAP-Message && &reply:Reply-Message)  -> FALSE
(0)       else {
(0)         [noop] = noop
(0)       } # else = noop
(0)     } # policy remove_reply_message_if_eap = noop
(0)   } # Post-Auth-Type REJECT = updated
(0) Delaying response for 1.000000 seconds
Waking up in 0.3 seconds.
Waking up in 0.6 seconds.
(0) Sending delayed response
(0) Sent Access-Reject Id 83 from 192.168.65.160:1812 to
192.168.65.161:58717 length 20
Waking up in 3.9 seconds.
(0) Sending duplicate reply to client pc1 port 58717 - ID: 83
Waking up in 8.9 seconds.
(0) Cleaning up request packet ID 83 with timestamp +61 due to
cleanup_delay was reached


Am Fr., 7. März 2025 um 13:55 Uhr schrieb Alan DeKok <
[email protected]>:

> On Mar 7, 2025, at 7:40 AM, IT DEB <[email protected]> wrote:
> > I am trying a simple TOTP authentication with the TOTP module. The idea
> is
> > that the user only has to enter the OTP via Radius and is authenticated.
> >
> > Freeradius starts but the authentication does not work. See below config
> > and output.
> >
>
> > #clients.conf File
>
>   Please don't post configuration files.  The documentation makes it VERY
> clear that this isn't needed.
>
> > Ready to process requests
> > (0) Received Access-Request Id 23 from 192.168.65.161:60716 to
> > 192.168.65.160:1812 length 72
> > (0)   NAS-Identifier = "vncserver"
> > (0)   User-Name = "bw"
> > (0)   CHAP-Password = 0x00549ccaa7d52c08fd1655bce475bdd1d9
>
>   You can't use CHAP with TOTP.  It has to be used with PAP
> authentication.  i.e. User-Password.
>
> > (0)   Auth-Type CHAP {
> > (0)     [totp] = noop
>
>   Yup.
>
>   I'll add an error message describing why it doesn't work.
>
>   There isn't a lot of point in doing TOTP with CHAP.  The TOTP is a
> one-time password, so "hiding" it inside of CHAP doesn't add any security.
>
>   Alan DeKok.
>
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