Use 'should' clause instead of 'filter' when querying native privileges (elastic#47019)

When we added support for wildcard application names, we started to build
the prefix query along with the term query but we used 'filter' clause
instead of 'should', so this would not fetch the correct application
privilege descriptor thereby failing the _has_privilege checks.
This commit changes the clause to use should and with minimum_should_match
as 1.

Author: bizybot

x-pack/plugin/security/src/main/java/org/elasticsearch/xpack/security/authz/store/NativePrivilegeStore.java

@@ -179,12 +179,13 @@ private QueryBuilder getApplicationNameQuery(Collection<String> applications) {
         }
         final BoolQueryBuilder boolQuery = QueryBuilders.boolQuery();
         if (termsQuery != null) {
-            boolQuery.filter(termsQuery);
+            boolQuery.should(termsQuery);
         }
         for (String wildcard : wildcardNames) {
             final String prefix = wildcard.substring(0, wildcard.length() - 1);
-            boolQuery.filter(QueryBuilders.prefixQuery(APPLICATION.getPreferredName(), prefix));
+            boolQuery.should(QueryBuilders.prefixQuery(APPLICATION.getPreferredName(), prefix));
         }
+        boolQuery.minimumShouldMatch(1);
         return boolQuery;
     }
 

x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/authz/store/NativePrivilegeStoreTests.java

@@ -191,7 +191,7 @@ public void testGetPrivilegesByWildcardApplicationName() throws Exception {
         assertThat(request.indices(), arrayContaining(RestrictedIndicesNames.SECURITY_MAIN_ALIAS));
 
         final String query = Strings.toString(request.source().query());
-        assertThat(query, containsString("{\"bool\":{\"filter\":[{\"terms\":{\"application\":[\"yourapp\"]"));
+        assertThat(query, containsString("{\"bool\":{\"should\":[{\"terms\":{\"application\":[\"yourapp\"]"));
         assertThat(query, containsString("{\"prefix\":{\"application\":{\"value\":\"myapp-\""));
         assertThat(query, containsString("{\"term\":{\"type\":{\"value\":\"application-privilege\""));
 

x-pack/plugin/src/test/resources/rest-api-spec/test/privileges/20_has_application_privs.yml

@@ -109,6 +109,27 @@ setup:
               ]
             }
 
+  - do:
+      security.put_role:
+        name: "role_containing_wildcard_app_name_and_plain_app_name"
+        body:  >
+          {
+            "cluster": [],
+            "indices": [],
+            "applications": [
+              {
+                "application": "myapp",
+                "privileges": ["user"],
+                "resources": ["*"]
+              },
+              {
+                "application": "yourapp-*",
+                "privileges": ["read"],
+                "resources": ["*"]
+              }
+            ]
+          }
+
   # And a user for each role
   - do:
       security.put_user:
@@ -134,6 +155,14 @@ setup:
                 "password": "p@ssw0rd",
                 "roles" : [ "yourapp_read_config" ]
               }
+  - do:
+      security.put_user:
+        username: "myapp_yourapp_wildard_role_user"
+        body:  >
+          {
+            "password": "p@ssw0rd",
+            "roles" : [ "role_containing_wildcard_app_name_and_plain_app_name" ]
+          }
 
 ---
 teardown:
@@ -168,6 +197,11 @@ teardown:
         username: "your_read"
         ignore: 404
 
+  - do:
+      security.delete_user:
+        username: "myapp_yourapp_wildard_role_user"
+        ignore: 404
+
   - do:
       security.delete_role:
         name: "myapp_engineering_read"
@@ -182,6 +216,12 @@ teardown:
       security.delete_role:
         name: "yourapp_read_config"
         ignore: 404
+
+  - do:
+      security.delete_role:
+        name: "role_containing_wildcard_app_name_and_plain_app_name"
+        ignore: 404
+
 ---
 "Test has_privileges with application-privileges":
   - do:
@@ -291,3 +331,48 @@ teardown:
         }
       }
     } }
+
+  - do:
+      headers: { Authorization: "Basic bXlhcHBfeW91cmFwcF93aWxkYXJkX3JvbGVfdXNlcjpwQHNzdzByZA==" } # myapp_yourapp_wildard_role_user
+      security.has_privileges:
+        user: null
+        body: >
+          {
+            "application": [
+              {
+                "application" : "myapp",
+                "resources" : [ "*" ],
+                "privileges" : [ "action:login" ]
+              },
+              {
+                "application" : "yourapp-v1",
+                "resources" : [ "*" ],
+                "privileges" : [ "read" ]
+              },
+              {
+                "application" : "yourapp-v2",
+                "resources" : [ "*" ],
+                "privileges" : [ "read" ]
+              }
+            ]
+          }
+
+  - match: { "username" : "myapp_yourapp_wildard_role_user" }
+  - match: { "has_all_requested" : true }
+  - match: { "application" : {
+    "myapp" : {
+      "*" : {
+        "action:login" : true
+      }
+    },
+    "yourapp-v1": {
+      "*": {
+        "read": true
+      }
+    },
+    "yourapp-v2": {
+      "*": {
+        "read": true
+      }
+    }
+  } }