[strongSwan] Prompting for Credentials with strongswan 5

[Martin Willi]

> I would like to popup a Dialog when xauth credentials or a smartcard
> pin is needed and not provided by the config files.

> As far as I see there is no such plugin yet, right?

No.

> Are there any additional docs or any plugin that I can use as starting
> point?

There is no way around reading the sources. These interfaces are well
commented and it shouldn't be too hard to understand them.

At the credential manager [1], you can register your own credential set
[2]. Once registered, the set will be asked for credentials when needed.
XAuth credentials and PINs are both handled as shared key [3] (XAuth as
SHARED_EAP). An example of a simple credential set is the NM backend
[4].

For an example how to write a plugin in general, take a look at the LED
plugin [5].

Regards
Martin

[1]http://git.strongswan.org/?p=strongswan.git;a=blob;f=src/libstrongswan/credentials/credential_manager.h;hb=HEAD#l35
[2]http://git.strongswan.org/?p=strongswan.git;a=blob;f=src/libstrongswan/credentials/credential_set.h;hb=HEAD#l30
[3]http://git.strongswan.org/?p=strongswan.git;a=blob;f=src/libstrongswan/credentials/keys/shared_key.h;hb=HEAD#l30
[4]http://git.strongswan.org/?p=strongswan.git;a=blob;f=src/charon-nm/nm/nm_creds.c;hb=HEAD
[5]http://git.strongswan.org/?p=strongswan.git;a=tree;f=src/libcharon/plugins/led;hb=HEAD