[krbdev.mit.edu #6601] gsssspi_set_cred_option cannot handle mech specific option

[Arlene Berry via RT]

The current options are specific to the kerberos mechanism.  Options are
likely to be implemented by only one mechanism but the mechglue layer
assumes that all mechanisms have implemented each option and will
succeed when asked to set them.  This fixes that:


Index: src/lib/gssapi/mechglue/g_set_cred_option.c
===================================================================
--- src/lib/gssapi/mechglue/g_set_cred_option.c	(revision 23482)
+++ src/lib/gssapi/mechglue/g_set_cred_option.c	(working copy)
@@ -45,6 +45,8 @@
     gss_mechanism	mech;
     int			i;
     OM_uint32		status;
+    OM_uint32		mech_status;
+    OM_uint32		mech_minor_status;
 
     if (minor_status == NULL)
 	return GSS_S_CALL_INACCESSIBLE_WRITE;
@@ -66,14 +68,20 @@
 	}
 
 	if (mech->gssspi_set_cred_option == NULL) {
-	    status = GSS_S_UNAVAILABLE;
 	    continue;
 	}
 
-	status = (mech->gssspi_set_cred_option)(minor_status,
+	mech_status = (mech->gssspi_set_cred_option)(&mech_minor_status,
 
union_cred->cred_array[i],
 						desired_object,
 						value);
+        if (mech_status == GSS_S_UNAVAILABLE) {
+            continue;
+        }
+        else {
+            status = mech_status;
+            *minor_status = mech_minor_status;
+        }
 	if (status != GSS_S_COMPLETE) {
 	    map_error(minor_status, mech);
	    break;