001 /* TrustAnchor.java -- an ultimately-trusted certificate.
002 Copyright (C) 2003, 2004 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038
039 package java.security.cert;
040
041 import gnu.java.security.x509.X500DistinguishedName;
042
043 import java.security.PublicKey;
044
045 /**
046 * An ultimately-trusted certificate to serve as the root of a
047 * certificate chain.
048 *
049 * @author Casey Marshall (rsdio@metastatic.org)
050 */
051 public class TrustAnchor
052 {
053
054 // Fields.
055 // ------------------------------------------------------------------------
056
057 /** The certificate authority's distinguished name. */
058 private final X500DistinguishedName caName;
059
060 /** The certficate authority's public key. */
061 private final PublicKey caKey;
062
063 /** The certficate authority's certificate. */
064 private final X509Certificate trustedCert;
065
066 /** The encoded name constraints bytes. */
067 private final byte[] nameConstraints;
068
069 // Constnuctors.
070 // ------------------------------------------------------------------------
071
072 /**
073 * Create a new trust anchor from a certificate and (optional) name
074 * constraints.
075 *
076 * <p>If the <i>nameConstraints</i> argument in non-null, it will be
077 * copied to prevent modification.
078 *
079 * @param trustedCert The trusted certificate.
080 * @param nameConstraints The encoded nameConstraints.
081 */
082 public TrustAnchor(X509Certificate trustedCert, byte[] nameConstraints)
083 {
084 if (trustedCert == null)
085 throw new NullPointerException();
086 this.trustedCert = trustedCert;
087 caName = null;
088 caKey = null;
089 if (nameConstraints != null)
090 this.nameConstraints = (byte[]) nameConstraints.clone();
091 else
092 this.nameConstraints = null;
093 }
094
095 /**
096 * Create a new trust anchor from a certificate authority's
097 * distinguished name, public key, and (optional) name constraints.
098 *
099 * <p>If the <i>nameConstraints</i> argument in non-null, it will be
100 * copied to prevent modification.
101 *
102 * @params caName The CA's distinguished name.
103 * @params caKey The CA's public key.
104 * @params nameConstraints The encoded nameConstraints.
105 */
106 public TrustAnchor(String caName, PublicKey caKey, byte[] nameConstraints)
107 {
108 if (caName == null || caKey == null)
109 throw new NullPointerException();
110 if (caName.length() == 0)
111 throw new IllegalArgumentException();
112 trustedCert = null;
113 this.caName = new X500DistinguishedName(caName);
114 this.caKey = caKey;
115 if (nameConstraints != null)
116 this.nameConstraints = (byte[]) nameConstraints.clone();
117 else
118 this.nameConstraints = null;
119 }
120
121 // Instance methods.
122 // ------------------------------------------------------------------------
123
124 /**
125 * Return the trusted certificate, or null if none was specified.
126 *
127 * @return The trusted certificate.
128 */
129 public final X509Certificate getTrustedCert()
130 {
131 return trustedCert;
132 }
133
134 /**
135 * Return the certificate authority's distinguished name, or null if
136 * none was specified.
137 *
138 * @return The CA's distinguished name.
139 */
140 public final String getCAName()
141 {
142 if (caName != null)
143 return caName.toString();
144 return null;
145 }
146
147 /**
148 * Return the certificate authority's public key, or null if none was
149 * specified.
150 *
151 * @return The CA's public key.
152 */
153 public final PublicKey getCAPublicKey()
154 {
155 return caKey;
156 }
157
158 /**
159 * Return the encoded name constraints, or null if none was specified.
160 *
161 * <p>The name constraints byte array is copied when this method is
162 * called to prevent modification.
163 *
164 * @return The encoded name constraints.
165 */
166 public final byte[] getNameConstraints()
167 {
168 if (nameConstraints == null)
169 return null;
170 return (byte[]) nameConstraints.clone();
171 }
172
173 /**
174 * Return a printable representation of this trust anchor.
175 *
176 * @return The printable representation.
177 */
178 public String toString()
179 {
180 if (trustedCert == null)
181 return "[ Trusted CA Public Key=" + caKey + ", Trusted CA Issuer Name="
182 + caName.toString() + " ]";
183 return "[ Trusted CA Certificate=" + trustedCert + " ]";
184 }
185 }