Mercurial > dive4elements > river
annotate gwt-client/src/main/java/org/dive4elements/river/client/server/auth/was/Signature.java @ 5861:172338b1407f
GWT client: Added copyright header.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Sun, 28 Apr 2013 14:30:15 +0200 |
parents | 5aa05a7a34b7 |
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rev | line source |
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by Intevation GmbH |
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3 * |
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4 * This file is Free Software under the GNU AGPL (>=v3) |
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the |
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6 * documentation coming with Dive4Elements River for details. |
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7 */ |
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8 |
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Fixed internal java dependencies
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9 package org.dive4elements.river.client.server.auth.was; |
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10 |
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11 import java.io.ByteArrayInputStream; |
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12 import java.security.cert.Certificate; |
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13 import java.security.cert.CertificateException; |
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14 import java.security.cert.CertificateFactory; |
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15 |
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16 import org.apache.commons.codec.binary.Base64; |
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17 import org.apache.log4j.Logger; |
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18 import org.jdom.Element; |
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19 |
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20 public class Signature { |
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21 |
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22 private static Logger logger = Logger.getLogger(Signature.class); |
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23 |
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24 private static final String XML_SIG_DIGEST_SHA1 = |
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25 "http://www.w3.org/2000/09/xmldsig#sha1"; |
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26 private static final String XML_SIG_SIGNATURE_RSA_SHA1 = |
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27 "http://www.w3.org/2000/09/xmldsig#rsa-sha1"; |
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28 |
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29 private final Element signature; |
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30 private Certificate cert; |
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31 private byte[] value; |
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32 private byte[] digestvalue; |
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33 private String reference; |
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34 |
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35 public Signature(Element signature) { |
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36 this.signature = signature; |
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37 this.parseSignatureInfo(); |
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38 this.parseSignatureValue(); |
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39 this.parseCertificate(); |
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40 } |
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41 |
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42 private void parseSignatureInfo() { |
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43 Element signatureinfo = this.signature.getChild("SignedInfo", |
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44 Namespaces.XML_SIG_NS); |
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45 if (signatureinfo != null) { |
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46 Element signaturemethod = signatureinfo.getChild("SignatureMethod", |
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47 Namespaces.XML_SIG_NS); |
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48 String algorithm = signaturemethod.getAttributeValue("Algorithm"); |
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49 if (!algorithm.equals(XML_SIG_SIGNATURE_RSA_SHA1)) { |
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50 logger.warn("Unkown signature alorithm " + algorithm); |
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51 } |
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52 |
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53 // There could be several references in XML-Sig spec but for me it |
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54 // doesn't make sense to have more then one in a SAML Assertion |
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55 Element reference = signatureinfo.getChild("Reference", |
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56 Namespaces.XML_SIG_NS); |
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57 // reference must be present but its better to check |
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58 if (reference != null) { |
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59 String digestvalue = reference.getChildText("DigestValue", |
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60 Namespaces.XML_SIG_NS); |
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61 String digestmethod = reference.getChildText("DigestMethod", |
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62 Namespaces.XML_SIG_NS); |
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63 if (!digestmethod.equals(XML_SIG_DIGEST_SHA1)) { |
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64 logger.warn("Unknown digest method " + digestmethod); |
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65 } |
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66 this.digestvalue = Base64.decodeBase64(digestvalue); |
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67 |
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68 String referenceuri = reference.getAttributeValue("URI"); |
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69 if (referenceuri.startsWith("#")) { |
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70 this.reference = referenceuri.substring(1); |
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71 } |
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72 else { |
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73 logger.warn("Unkown reference type " + referenceuri); |
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74 this.reference = referenceuri; |
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75 } |
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76 } |
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77 } |
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78 } |
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79 |
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80 private void parseSignatureValue() { |
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81 String signaturevalue = this.signature.getChildText("SignatureValue", |
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82 Namespaces.XML_SIG_NS); |
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83 this.value = Base64.decodeBase64(signaturevalue); |
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84 } |
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85 |
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86 private void parseCertificate() { |
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87 Element keyinfo = this.signature.getChild("KeyInfo", |
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88 Namespaces.XML_SIG_NS); |
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89 if (keyinfo != null) { |
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90 Element data = keyinfo.getChild("X509Data", Namespaces.XML_SIG_NS); |
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91 if (data != null) { |
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92 String base64cert = data.getChildText("X509Certificate", |
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93 Namespaces.XML_SIG_NS); |
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94 if (base64cert != null) { |
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95 byte[] bytes = Base64.decodeBase64(base64cert); |
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96 try { |
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97 CertificateFactory cf = CertificateFactory.getInstance( |
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98 "X.509"); |
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99 this.cert = cf.generateCertificate( |
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100 new ByteArrayInputStream(bytes)); |
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101 } |
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102 catch(CertificateException e) { |
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103 // should never occur |
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104 logger.error(e); |
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105 } |
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106 } |
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107 } |
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108 } |
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109 } |
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110 |
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111 public Certificate getCertificate() { |
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112 return this.cert; |
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113 } |
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114 |
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115 public byte[] getValue() { |
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116 return this.value; |
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117 } |
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118 |
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119 public String getReference() { |
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120 // In theory there could be several references with digestvalues, ... |
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121 return this.reference; |
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122 } |
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123 |
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124 public byte[] getDigestValue() { |
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125 return this.digestvalue; |
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126 } |
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127 } |
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