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Bug #12509

open

Deffered authentication does not work with auth-gen-token external-auth or pusk "auth-token"

Added by Arkadiusz Rzadkowolski 3 months ago. Updated 3 months ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
OpenVPN
Target version:
-
Start date:
Due date:
% Done:

0%

Estimated time:
Plus Target Version:
Release Notes:
Default
Affected Version:
Affected Architecture:

Description

I am able to use properly deferred authentication on normal login.

Problem rises when I try to use auth-gen-token 0 external-auth (so that I can do additional validation in auth-user-pass-verify script) or by pushing custom auth-token.

Even though script gets triggered in those cases, no matter how I return result (either through control file or exit code=0).

Sample code used below (always authenticates user just a sample).

```
reneg-sec 30
auth-gen-token 0 external-auth
plugin /usr/local/lib/openvpn/plugins/openvpn-plugin-auth-script.so /auth/wrapper.sh
```

wrapper.sh
```
#!/bin/sh

php /auth/auth.php
```

auth.php
```
$controlFile = getenv('auth_control_file');

if(isset($_SERVER['session_state']) && $_SERVER['session_state'] === 'Authenticated') {
if ($controlFile) {
file_put_contents($controlFile, "1");
exit(0);
}
exit(0);
} elseif($_SERVER['session_state'] === 'Initial') {
if ($controlFile) {
file_put_contents($controlFile, "1");
exit(0);
}
exit(0);
}
if ($controlFile) {
file_put_contents($controlFile, "0");
exit(0);
}
exit(1);
```
Actions #1

Updated by Arkadiusz Rzadkowolski 3 months ago

Some more info - with deferred plugin we get:

Nov 8 10:02:46 openvpn 53695 arek/192.168.100.3:58560 TLS Error: local/remote TLS keys are out of sync: [AF_INET]192.168.100.3:58560 [1]
Nov 8 10:02:41 openvpn 53695 arek/192.168.100.3:58560 TLS Error: local/remote TLS keys are out of sync: [AF_INET]192.168.100.3:58560 [1]

which cause connection to be unstable.

That doesn't happen if we use it in blocking mode (calling script from auth-user-pass-verify directly)

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