[gnome-online-accounts/wip/backports: 3/6] kerberos: make sure first KEYRING credential is automatically selected

[Debarshi Ray <debarshir src gnome org>]

commit afda7d73d1a28bccebb8cd04ad9b21baf8e036b0
Author: Ray Strode <rstrode redhat com>
Date:   Mon Oct 14 11:47:17 2013 -0400

    kerberos: make sure first KEYRING credential is automatically selected
    
    Right now, we ensure the first DIR type signed in kerberos identity
    gets selected automatically.  We should do the same for KEYRING types
    as well.
    
    To better future proof the code, assume future keyring types will
    support multiple identities going forward.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=710116

 src/goaidentity/goakerberosidentitymanager.c |   31 +++++++++++++++++++++-----
 1 files changed, 25 insertions(+), 6 deletions(-)
---
diff --git a/src/goaidentity/goakerberosidentitymanager.c b/src/goaidentity/goakerberosidentitymanager.c
index 6d0d7f4..f3664fe 100644
--- a/src/goaidentity/goakerberosidentitymanager.c
+++ b/src/goaidentity/goakerberosidentitymanager.c
@@ -763,17 +763,36 @@ get_new_credentials_cache (GoaKerberosIdentityManager *self,
                            krb5_ccache                *credentials_cache)
 {
   krb5_error_code error_code;
+  gboolean supports_multiple_identities;
+
+  if (g_strcmp0 (self->priv->credentials_cache_type, "FILE") == 0)
+    {
+      goa_debug ("GoaKerberosIdentityManager: credential cache type %s doesn't supports cache collections", 
self->priv->credentials_cache_type);
+      supports_multiple_identities = FALSE;
+    }
+  else if (g_strcmp0 (self->priv->credentials_cache_type, "DIR") == 0 ||
+           g_strcmp0 (self->priv->credentials_cache_type, "KEYRING") == 0)
+    {
+      goa_debug ("GoaKerberosIdentityManager: credential cache type %s supports cache collections", 
self->priv->credentials_cache_type);
+      supports_multiple_identities = TRUE;
+    }
+  else
+    {
+      goa_debug ("GoaKerberosIdentityManager: don't know if credential cache type %s supports cache 
collections, assuming yes", self->priv->credentials_cache_type);
+      supports_multiple_identities = TRUE;
+    }
 
   /* If we're configured for FILE based credentials, then we only
    * have one ccache, and we need to use it always.
    *
-   * If we're configured for DIR based credentials, then we need
-   * to use the default name "tkt" the first time around, and
-   * then need to use unique names for subsequent tickets.
+   * If we're configured for DIR or KEYRING based credentials, then we
+   * can have multiple ccache's so we should use the default one first
+   * (so it gets selected automatically) and then fallback to unique
+   * ccache names for subsequent tickets.
+   *
    */
-  if (g_strcmp0 (self->priv->credentials_cache_type, "FILE") == 0 ||
-      (g_strcmp0 (self->priv->credentials_cache_type, "DIR") == 0 &&
-       g_hash_table_size (self->priv->identities) == 0))
+  if (!supports_multiple_identities ||
+      g_hash_table_size (self->priv->identities) == 0)
     {
       krb5_ccache default_cache;