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.xml.signature;
18
19 import java.util.LinkedList;
20 import java.util.List;
21
22 import org.apache.xml.security.signature.XMLSignature;
23 import org.apache.xml.security.transforms.Transforms;
24 import org.slf4j.Logger;
25 import org.slf4j.LoggerFactory;
26
27 /**
28 * A generic content reference that uses a URI to reference the content to be signed.
29 */
30 public class URIContentReference implements ContentReference {
31
32 /** Logger. */
33 private final Logger log = LoggerFactory.getLogger(URIContentReference.class);
34
35 /** Element reference ID. */
36 private String referenceID;
37
38 /** Algorithm used to digest the content . */
39 private String digestAlgorithm;
40
41 /** Transforms applied to the content. */
42 private List<String> transforms;
43
44 /**
45 * Constructor. The anchor designator (#) must not be included in the ID.
46 *
47 * @param referenceID the reference ID of the element to be signed
48 */
49 public URIContentReference(String referenceID) {
50 this.referenceID = referenceID;
51 transforms = new LinkedList<String>();
52 }
53
54 /**
55 * Gets the transforms applied to the content prior to digest generation.
56 *
57 * @return the transforms applied to the content prior to digest generation
58 */
59 public List<String> getTransforms() {
60 return transforms;
61 }
62
63 /**
64 * Gets the algorithm used to digest the content.
65 *
66 * @return the algorithm used to digest the content
67 */
68 public String getDigestAlgorithm() {
69 return digestAlgorithm;
70 }
71
72 /**
73 * Sets the algorithm used to digest the content.
74 *
75 * @param newAlgorithm the algorithm used to digest the content
76 */
77 public void setDigestAlgorithm(String newAlgorithm) {
78 digestAlgorithm = newAlgorithm;
79 }
80
81 /** {@inheritDoc} */
82 public void createReference(XMLSignature signature) {
83 try {
84 Transforms dsigTransforms = new Transforms(signature.getDocument());
85 for (String transform : transforms) {
86 dsigTransforms.addTransform(transform);
87 }
88
89 signature.addDocument(referenceID, dsigTransforms, digestAlgorithm);
90 } catch (Exception e) {
91 log.error("Error while adding content reference", e);
92 }
93 }
94 }