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1   /*
2    * Copyright [2005] [University Corporation for Advanced Internet Development, Inc.]
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    * http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  /**
18   * 
19   */
20  
21  package org.opensaml.saml2.metadata.validator;
22  
23  import org.opensaml.saml2.metadata.KeyDescriptor;
24  import org.opensaml.xml.security.credential.UsageType;
25  import org.opensaml.xml.validation.ValidationException;
26  import org.opensaml.xml.validation.Validator;
27  
28  /**
29   * Checks {@link org.opensaml.saml2.metadata.KeyDescriptor} for Schema compliance.
30   */
31  public class KeyDescriptorSchemaValidator implements Validator<KeyDescriptor> {
32  
33      /** Constructor. */
34      public KeyDescriptorSchemaValidator() {
35  
36      }
37  
38      /** {@inheritDoc} */
39      public void validate(KeyDescriptor keyDescriptor) throws ValidationException {
40          validateKeyInfo(keyDescriptor);
41          validateUse(keyDescriptor);
42      }
43  
44      /**
45       * Checks that KeyInfo is present.
46       * 
47       * @param keyDescriptor the key descriptor to validate
48       * @throws ValidationException thrown if KeyInfo is not present
49       */
50      protected void validateKeyInfo(KeyDescriptor keyDescriptor) throws ValidationException {
51          if (keyDescriptor.getKeyInfo()==null) {
52              throw new ValidationException("KeyInfo required");
53          }
54      }
55      
56      /**
57       * Checks that use attribute has only one of allowed values.
58       * 
59       * @param keyDescriptor the key descriptor to validate
60       * @throws ValidationException throw in use attribute does not have a legal value
61       */
62      protected void validateUse(KeyDescriptor keyDescriptor) throws ValidationException {
63          UsageType use = keyDescriptor.getUse();
64          if (use == null) {
65              return;
66          }
67          if (       ! use.equals(UsageType.SIGNING) 
68                  && ! use.equals(UsageType.ENCRYPTION) 
69                  && ! use.equals(UsageType.UNSPECIFIED) ) {
70              throw new ValidationException("Invalid value for use attribute: " + use.toString());
71          }
72      }
73  }