AuthDomainGenericAuthCallback

The prototype for a #SoupAuthDomain generic authentication callback.

The callback should look up the user's password, call method@AuthDomain.check_password, and use the return value from that method as its own return value.

In general, for security reasons, it is preferable to use the auth-domain-specific auth callbacks (eg, callback@AuthDomainBasicAuthCallback and callback@AuthDomainDigestAuthCallback), because they don't require keeping a cleartext password database. Most users will use the same password for many different sites, meaning if any site with a cleartext password database is compromised, accounts on other servers might be compromised as well. For many of the cases where class@Server is used, this is not really relevant, but it may still be worth considering.

• param domain a #SoupAuthDomain

• param msg the #SoupServerMessage being authenticated

• param username the username from @msg

• return true if @msg is authenticated, false if not.