[c1736fe] | 1 | package net.deterlab.abac; |
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| 2 | |
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| 3 | import java.io.*; |
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| 4 | import java.math.*; |
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| 5 | import java.text.*; |
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| 6 | |
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| 7 | import java.util.*; |
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| 8 | |
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| 9 | import java.security.*; |
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| 10 | import java.security.cert.*; |
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| 11 | |
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| 12 | import javax.xml.parsers.*; |
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| 13 | import javax.xml.transform.*; |
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| 14 | import javax.xml.transform.dom.*; |
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| 15 | import javax.xml.transform.stream.*; |
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| 16 | |
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| 17 | import javax.xml.crypto.*; |
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| 18 | import javax.xml.crypto.dsig.*; |
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| 19 | import javax.xml.crypto.dsig.dom.*; |
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| 20 | import javax.xml.crypto.dsig.keyinfo.*; |
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| 21 | import javax.xml.crypto.dsig.spec.*; |
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| 22 | |
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| 23 | import org.xml.sax.*; |
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| 24 | import org.w3c.dom.*; |
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| 25 | |
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| 26 | /** |
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| 27 | * An ABAC credential formatted as an abac-type GENI credential, version 1.1. |
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| 28 | * @author <a href="http://abac.deterlab.net">ISI ABAC team</a> |
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| 29 | * @version 1.4 |
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| 30 | */ |
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| 31 | public class GENICredentialv1_1 extends GENICredential implements Comparable { |
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| 32 | /** |
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| 33 | * Create an empty Credential. |
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| 34 | */ |
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| 35 | public GENICredentialv1_1() { |
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| 36 | super(); |
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| 37 | } |
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| 38 | /** |
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| 39 | * Create a credential from a head and tail role. This credential has no |
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| 40 | * underlying certificate, and cannot be exported or used in real proofs. |
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| 41 | * make_cert can create a certificate for a credential initialized this |
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| 42 | * way. |
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| 43 | * @param head the Role at the head of the credential |
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| 44 | * @param tail the Role at the tail of the credential |
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| 45 | */ |
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| 46 | public GENICredentialv1_1(Role head, Role tail) { |
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| 47 | super(head, tail); |
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| 48 | } |
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| 49 | /** |
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| 50 | * Create a credential from an attribute cert in a file. Throws an |
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| 51 | * exception if the cert file can't be opened or if there's a format |
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| 52 | * problem with the cert. Note that catching |
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| 53 | * java.security.GeneralSecurityException catches most of the exceptions |
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| 54 | * this throws. |
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| 55 | * @param filename a String containing the filename to read |
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| 56 | * @param ids a Collection of Identities to use in validating the cert |
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| 57 | * @throws CertInvalidException if the stream is unparsable |
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| 58 | * @throws MissingIssuerException if none of the Identities can validate the |
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| 59 | * certificate |
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| 60 | * @throws BadSignatureException if the signature check fails |
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| 61 | */ |
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| 62 | GENICredentialv1_1(String filename, Collection<Identity> ids) |
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| 63 | throws ABACException { |
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| 64 | super(filename, ids); |
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| 65 | } |
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| 66 | |
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| 67 | /** |
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| 68 | * Create a credential from an attribute cert in a file. Throws an |
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| 69 | * exception if the cert file can't be opened or if there's a format |
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| 70 | * problem with the cert. Note that catching |
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| 71 | * java.security.GeneralSecurityException catches most of the exceptions |
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| 72 | * this throws. |
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| 73 | * @param file the File to read |
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| 74 | * @param ids a Collection of Identities to use in validating the cert |
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| 75 | * @throws CertInvalidException if the stream is unparsable |
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| 76 | * @throws MissingIssuerException if none of the Identities can validate the |
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| 77 | * certificate |
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| 78 | * @throws BadSignatureException if the signature check fails |
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| 79 | */ |
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| 80 | GENICredentialv1_1(File file, Collection<Identity> ids) |
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| 81 | throws ABACException { |
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| 82 | super(file, ids); |
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| 83 | } |
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| 84 | |
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| 85 | /** |
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| 86 | * Create a credential from an InputStream. Throws an exception if the |
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| 87 | * stream can't be parsed or if there's a format problem with the cert. |
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| 88 | * Note that catching java.security.GeneralSecurityException catches most |
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| 89 | * of the exceptions this throws. |
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| 90 | * @param s the InputStream to read |
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| 91 | * @param ids a Collection of Identities to use in validating the cert |
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| 92 | * @throws CertInvalidException if the stream is unparsable |
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| 93 | * @throws MissingIssuerException if none of the Identities can validate the |
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| 94 | * certificate |
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| 95 | * @throws BadSignatureException if the signature check fails |
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| 96 | */ |
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| 97 | GENICredentialv1_1(InputStream s, Collection<Identity> ids) |
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| 98 | throws ABACException { |
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| 99 | super(s, ids); |
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| 100 | } |
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| 101 | |
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| 102 | protected void add_structured_role(Role r, Node top) { |
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| 103 | if ( r.is_principal()) { |
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| 104 | Element p = doc.createElement("ABACprincipal"); |
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| 105 | Element k = doc.createElement("keyid"); |
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| 106 | k.appendChild(doc.createTextNode(r.principal())); |
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| 107 | p.appendChild(k); |
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| 108 | top.appendChild(p); |
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| 109 | } else if ( r.is_role() ) { |
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| 110 | Element p = doc.createElement("ABACprincipal"); |
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| 111 | Element k = doc.createElement("keyid"); |
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| 112 | Element rr = doc.createElement("role"); |
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| 113 | k.appendChild(doc.createTextNode(r.principal())); |
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| 114 | rr.appendChild(doc.createTextNode(r.role_name())); |
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| 115 | p.appendChild(k); |
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| 116 | top.appendChild(p); |
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| 117 | top.appendChild(rr); |
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| 118 | } else { |
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| 119 | Element p = doc.createElement("ABACprincipal"); |
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| 120 | Element k = doc.createElement("keyid"); |
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| 121 | Element rr = doc.createElement("role"); |
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| 122 | Element lr = doc.createElement("linking_role"); |
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| 123 | k.appendChild(doc.createTextNode(r.principal())); |
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| 124 | rr.appendChild(doc.createTextNode(r.role_name())); |
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| 125 | lr.appendChild(doc.createTextNode(r.linking_role())); |
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| 126 | p.appendChild(k); |
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| 127 | top.appendChild(p); |
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| 128 | top.appendChild(rr); |
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| 129 | top.appendChild(lr); |
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| 130 | } |
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| 131 | } |
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| 132 | |
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| 133 | protected Node make_structured_rt0() { |
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| 134 | Element a = doc.createElement("rt0"); |
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| 135 | Element v = doc.createElement("version"); |
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| 136 | Element n = doc.createElement("head"); |
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| 137 | Role[] tailRoles = null; |
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| 138 | |
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| 139 | v.appendChild(doc.createTextNode("1.1")); |
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| 140 | a.appendChild(v); |
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| 141 | add_structured_role(head(), n); |
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| 142 | a.appendChild(n); |
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| 143 | |
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| 144 | if (tail().is_intersection()) { |
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| 145 | try { |
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| 146 | tailRoles = tail().prereqs(); |
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| 147 | } catch (ABACException ignored ) { } |
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| 148 | } else { |
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| 149 | tailRoles = new Role[] { tail() }; |
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| 150 | } |
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| 151 | |
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| 152 | for ( Role tr: tailRoles ) { |
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| 153 | n = doc.createElement("tail"); |
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| 154 | add_structured_role(tr, n); |
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| 155 | a.appendChild(n); |
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| 156 | } |
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| 157 | return a; |
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| 158 | } |
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| 159 | |
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| 160 | /** |
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| 161 | * Encode the abac credential's XML and set the validity. This is straight |
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| 162 | * line code that directly builds the credential. |
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| 163 | * @param validity a long holding the number of seconds that the credential |
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| 164 | * is valid for. |
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| 165 | * @return a Node, the place to attach signatures |
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| 166 | * @throws ABACException if any of the XML construction fails |
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| 167 | */ |
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| 168 | protected Node make_rt0_content(long validity) throws ABACException { |
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| 169 | DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); |
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| 170 | DocumentBuilder db = null; |
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| 171 | SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'"); |
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| 172 | StringBuffer expBuf = new StringBuffer(); |
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| 173 | |
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| 174 | /* This is a weirdness to cope with the GENI format. They have a naked |
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| 175 | * xml:id specifier without any namespace declarations in the |
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| 176 | * credential. Notice that this is the opposite of the setting used in |
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| 177 | * init to read a credential. */ |
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| 178 | dbf.setNamespaceAware(false); |
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| 179 | |
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| 180 | if ( dbf == null ) |
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| 181 | throw new ABACException("Cannot get DocumentBuilderFactory!?"); |
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| 182 | |
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| 183 | try { |
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| 184 | db = dbf.newDocumentBuilder(); |
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| 185 | } |
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| 186 | catch (ParserConfigurationException pe) { |
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| 187 | throw new ABACException("Cannot get DocumentBuilder!?" + |
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| 188 | pe.getMessage(), pe); |
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| 189 | } |
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| 190 | |
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| 191 | doc = db.newDocument(); |
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| 192 | if ( doc == null ) |
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| 193 | throw new ABACException("No Document"); |
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| 194 | |
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| 195 | Element root = doc.createElement("signed-credential"); |
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| 196 | Element cred = doc.createElement("credential"); |
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| 197 | Element serial = doc.createElement("serial"); |
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| 198 | Element owner_gid = doc.createElement("owner_gid"); |
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| 199 | Element target_gid = doc.createElement("target_gid"); |
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| 200 | Element uuid = doc.createElement("uuid"); |
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| 201 | Element sig = doc.createElement("signatures"); |
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| 202 | Element e = doc.createElement("type"); |
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| 203 | Node text = doc.createTextNode("abac"); |
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| 204 | |
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| 205 | doc.appendChild(root); |
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| 206 | |
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| 207 | cred.setAttribute("xml:id", "ref0"); |
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| 208 | /* So that the signing code can find the section to sign */ |
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| 209 | cred.setIdAttribute("xml:id", true); |
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| 210 | |
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| 211 | root.appendChild(cred); |
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| 212 | e.appendChild(text); |
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| 213 | for (Element ele : new Element[] |
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| 214 | {serial, owner_gid, target_gid, uuid, sig, e }) |
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| 215 | cred.appendChild(ele); |
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| 216 | |
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| 217 | m_expiration = new Date(System.currentTimeMillis() + |
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| 218 | (1000L * validity )); |
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| 219 | df.setTimeZone(new SimpleTimeZone(0, "Z")); |
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| 220 | df.format(m_expiration, expBuf, new FieldPosition(0)); |
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| 221 | e = doc.createElement("expires"); |
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| 222 | text = doc.createTextNode(expBuf.toString()); |
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| 223 | e.appendChild(text); |
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| 224 | cred.appendChild(e); |
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| 225 | |
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| 226 | e = doc.createElement("abac"); |
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| 227 | e.appendChild(make_structured_rt0()); |
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| 228 | cred.appendChild(e); |
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| 229 | |
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| 230 | root.appendChild(sig); |
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| 231 | return sig; |
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| 232 | } |
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| 233 | |
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| 234 | protected Role parse_structured_rt0(Node srt) throws CertInvalidException { |
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| 235 | Node p = getChildByName(srt, "ABACprincipal"); |
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| 236 | Node r = getChildByName(srt, "role"); |
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| 237 | Node lr = getChildByName(srt, "linking_role"); |
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| 238 | String k = null; |
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| 239 | String rs = ( r != null ) ? r.getTextContent() : null; |
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| 240 | String lrs = ( lr!= null ) ? lr.getTextContent() : null; |
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| 241 | |
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| 242 | if (p == null ) |
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| 243 | throw new CertInvalidException("No principal!?"); |
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| 244 | |
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| 245 | if ( (p = getChildByName(p, "keyid")) == null ) |
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| 246 | throw new CertInvalidException("Principal w/o keyid"); |
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| 247 | |
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| 248 | if ( (k = p.getTextContent()) == null ) |
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| 249 | throw new CertInvalidException("Empty keyid"); |
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| 250 | |
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| 251 | if ( lrs != null ) { |
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| 252 | if ( rs == null ) { |
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| 253 | throw new CertInvalidException("Linking role without role"); |
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| 254 | } |
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| 255 | return new Role(k + "." + lrs + "." + rs); |
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| 256 | } else if ( rs == null ) { |
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| 257 | return new Role(k); |
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| 258 | } else { |
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| 259 | return new Role(k + "." + rs); |
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| 260 | } |
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| 261 | } |
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| 262 | |
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| 263 | /** |
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| 264 | * Load the roles off the attribute cert. |
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| 265 | * @throws CertInvalidException if the certificate is badly formatted |
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| 266 | */ |
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| 267 | protected void load_roles() throws CertInvalidException { |
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| 268 | if ( doc == null ) |
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| 269 | throw new CertInvalidException("No credential"); |
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| 270 | |
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| 271 | NodeList nodes = doc.getElementsByTagName("credential"); |
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| 272 | Node node = null; |
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| 273 | Node type = null; |
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| 274 | Node rt0 = null; |
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| 275 | Node v = null; |
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| 276 | String vs = null; |
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| 277 | |
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| 278 | if (nodes == null || nodes.getLength() != 1) |
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| 279 | throw new CertInvalidException("More than one credential?"); |
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| 280 | |
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| 281 | node = nodes.item(0); |
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| 282 | if ( node == null ) |
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| 283 | throw new CertInvalidException("bad credential element?"); |
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| 284 | |
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| 285 | if ( (type = getChildByName(node, "type")) == null ) { |
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| 286 | throw new CertInvalidException("No Type field"); |
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| 287 | } |
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| 288 | |
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| 289 | if ( !"abac".equals(type.getTextContent()) ) |
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| 290 | throw new CertInvalidException("Not an abac type credential"); |
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| 291 | |
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| 292 | // Walk down to the abac and rt0 field using the rt0 variable. |
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| 293 | if ( (rt0 = getChildByName(node, "abac")) == null ) { |
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| 294 | throw new CertInvalidException("No abac field"); |
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| 295 | } |
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| 296 | if ( (rt0 = getChildByName(rt0, "rt0")) == null ) { |
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| 297 | throw new CertInvalidException("No rt0 field"); |
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| 298 | } |
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| 299 | |
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| 300 | if ( (v = getChildByName(rt0, "version")) == null ) { |
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| 301 | throw new CertInvalidException("No version field"); |
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| 302 | } |
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| 303 | if ( (vs = v.getTextContent()) == null) { |
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| 304 | throw new CertInvalidException("empty version field"); |
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| 305 | } |
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| 306 | if ( ! vs.trim().equals("1.1")) { |
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| 307 | throw new CertInvalidException("bad version: expected 1.1 got "+vs); |
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| 308 | } |
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| 309 | |
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| 310 | m_head = null; |
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| 311 | m_tail = null; |
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| 312 | |
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| 313 | for (Node n = rt0.getFirstChild(); n != null; n = n.getNextSibling()) { |
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| 314 | String nname = null; |
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| 315 | |
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| 316 | if ( n.getNodeType() != Node.ELEMENT_NODE) continue; |
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| 317 | nname = n.getNodeName(); |
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| 318 | if (nname == null ) continue; |
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| 319 | |
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| 320 | if (nname.equals("head")) { |
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| 321 | if ( m_head != null ) |
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| 322 | throw new CertInvalidException("2 head elements"); |
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| 323 | try { |
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| 324 | m_head = parse_structured_rt0(n); |
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| 325 | } catch (CertInvalidException ce) { |
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| 326 | throw new CertInvalidException("Error parsing head: " + |
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| 327 | ce.getMessage()); |
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| 328 | } |
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| 329 | } else if (nname.equals("tail")) { |
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| 330 | Role t = null; |
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| 331 | |
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| 332 | try { |
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| 333 | t = parse_structured_rt0(n); |
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| 334 | } catch (CertInvalidException ce) { |
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| 335 | throw new CertInvalidException("Error parsing tail: " + |
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| 336 | ce.getMessage()); |
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| 337 | } |
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| 338 | // This is a little wasteful in processing terms, but simply |
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| 339 | // appends the new tail entry to a new intersection role. |
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| 340 | if ( m_tail != null ) |
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| 341 | m_tail = new Role(m_tail.toString() + " & " + |
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| 342 | t.toString()); |
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| 343 | else m_tail = t; |
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| 344 | } |
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| 345 | } |
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| 346 | } |
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| 347 | /** |
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| 348 | * Return a CredentialCredentialFactorySpecialization for |
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| 349 | * GENICredentialsv1_1. Used by the CredentialFactory to parse and generate |
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| 350 | * these kind of credentials. It basically wraps constuctor calls. |
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| 351 | * @return a CredentialFactorySpecialization for this kind of credential. |
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| 352 | */ |
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| 353 | static public CredentialFactorySpecialization |
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| 354 | getCredentialFactorySpecialization() { |
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| 355 | return new CredentialFactorySpecialization() { |
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| 356 | public Credential[] parseCredential(InputStream is, |
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| 357 | Collection<Identity> ids) throws ABACException { |
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| 358 | return new Credential[] { new GENICredentialv1_1(is, ids) }; |
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| 359 | } |
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| 360 | public Credential generateCredential(Role head, Role tail) { |
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| 361 | return new GENICredentialv1_1(head, tail); |
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| 362 | } |
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| 363 | }; |
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| 364 | } |
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| 365 | } |
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