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1   /*
2    * Copyright [2006] [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  package org.opensaml.saml2.metadata.impl;
18  
19  import org.opensaml.common.impl.AbstractSAMLObjectUnmarshaller;
20  import org.opensaml.saml2.metadata.EncryptionMethod;
21  import org.opensaml.saml2.metadata.KeyDescriptor;
22  import org.opensaml.xml.XMLObject;
23  import org.opensaml.xml.io.UnmarshallingException;
24  import org.opensaml.xml.security.credential.UsageType;
25  import org.opensaml.xml.signature.KeyInfo;
26  import org.w3c.dom.Attr;
27  
28  /**
29   * A thread-safe unmarshaller for {@link org.opensaml.saml2.metadata.KeyDescriptor}s.
30   */
31  public class KeyDescriptorUnmarshaller extends AbstractSAMLObjectUnmarshaller {
32  
33      /** {@inheritDoc} */
34      protected void processChildElement(XMLObject parentSAMLObject, XMLObject childSAMLObject)
35              throws UnmarshallingException {
36          KeyDescriptor keyDescriptor = (KeyDescriptor) parentSAMLObject;
37  
38          if (childSAMLObject instanceof KeyInfo) {
39              keyDescriptor.setKeyInfo((KeyInfo) childSAMLObject);
40          } else if (childSAMLObject instanceof EncryptionMethod) {
41              keyDescriptor.getEncryptionMethods().add((EncryptionMethod) childSAMLObject);
42          } else {
43              super.processChildElement(parentSAMLObject, childSAMLObject);
44          }
45      }
46  
47      /** {@inheritDoc} */
48      protected void processAttribute(XMLObject samlObject, Attr attribute) throws UnmarshallingException {
49          KeyDescriptor keyDescriptor = (KeyDescriptor) samlObject;
50  
51          if (attribute.getName().equals(KeyDescriptor.USE_ATTRIB_NAME)) {
52              try {
53                  UsageType usageType = UsageType.valueOf(UsageType.class, attribute.getValue().toUpperCase());
54                  // Only allow the enum values specified in the schema.
55                  if (usageType != UsageType.SIGNING && usageType != UsageType.ENCRYPTION) {
56                      throw new UnmarshallingException("Invalid key usage type: " + attribute.getValue());
57                  }
58                  keyDescriptor.setUse(usageType);
59              } catch (IllegalArgumentException e) {
60                  throw new UnmarshallingException("Invalid key usage type: " + attribute.getValue());
61              }
62          }
63  
64          super.processAttribute(samlObject, attribute);
65      }
66  }