[core] first try at multiple signing keys support

The idea was to replace every use of an xmlSecKey* by a loop over a
GList* of xmlSecKey*.

 - In the structure LassoProviderPrivate changed
    xmlSecKey*public_key            ->   GList* signing_public_keys
    xmlNode*signing_key_descriptor  ->   GList* signing_key_descriptors.
 - Renamed lasso_provider_try_loading_public_key to
   lasso_provider_try_loading_public_keys and chaned its signature
   accordingly
 - Renamed lasso_provider_get_public_key to
   lasso_provider_get_public_keys and changed the signature accordingly.
 - Changed lasso_provider_get_encryption_public_key to return the first
   signing key from the list as a temporary work around. Multiple
   encryption keys will be supported later.
 - Changed lasso_provider_load_public_key to load keys from the passed
   file on the LassoProvider constructor, from every key descriptors
   found for signing and eventually from the key descriptor marked for
   encryption.
 - Every failure to load from a file or an XML KeyInfo descriptor are
   noew reported as warning.
 - Query signature checking was completely moved to
   lasso_provider_verify_query_signature and
   lasso_provider_verify_signature now calls it.
 - lasso_provider_verify_signature is now using lasso_verify_signature
   from the xml/tools.o module.
 - lasso_provider_verify_single_signature was modified to support
   multiple signing keys.

0 files changed, 0 insertions, 0 deletions