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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/security/cert/CertPath.java | |
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Diffstat (limited to 'libjava/classpath/java/security/cert/CertPath.java')
-rw-r--r-- | libjava/classpath/java/security/cert/CertPath.java | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/libjava/classpath/java/security/cert/CertPath.java b/libjava/classpath/java/security/cert/CertPath.java new file mode 100644 index 000000000..7211647a4 --- /dev/null +++ b/libjava/classpath/java/security/cert/CertPath.java @@ -0,0 +1,254 @@ +/* CertPath.java -- a sequence of certificates + Copyright (C) 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.security.cert; + +import gnu.java.lang.CPStringBuilder; + +import java.io.ByteArrayInputStream; +import java.io.NotSerializableException; +import java.io.ObjectStreamException; +import java.io.Serializable; +import java.util.Iterator; +import java.util.List; + +/** + * This class represents an immutable sequence, or path, of security + * certificates. The path type must match the type of each certificate in the + * path, or in other words, for all instances of cert in a certpath object, + * <code>cert.getType().equals(certpath.getType())</code> will return true. + * + * <p>Since this class is immutable, it is thread-safe. During serialization, + * the path is consolidated into a {@link CertPathRep}, which preserves the + * data regardless of the underlying implementation of the path. + * + * @author Eric Blake (ebb9@email.byu.edu) + * @since 1.4 + * @status updated to 1.4 + */ +public abstract class CertPath implements Serializable +{ + /** + * The serialized representation of a path. + * + * @author Eric Blake (ebb9@email.byu.edu) + */ + protected static class CertPathRep implements Serializable + { + /** + * Compatible with JDK 1.4+. + */ + private static final long serialVersionUID = 3015633072427920915L; + + /** + * The certificate type. + * + * @serial the type of the certificate path + */ + private final String type; + + /** + * The encoded form of the path. + * + * @serial the encoded form + */ + private final byte[] data; + + /** + * Create the new serial representation. + * + * @param type the path type + * @param data the encoded path data + */ + protected CertPathRep(String type, byte[] data) + { + this.type = type; + this.data = data; + } + + /** + * Decode the data into an actual {@link CertPath} upon deserialization. + * + * @return the replacement object + * @throws ObjectStreamException if replacement fails + */ + protected Object readResolve() throws ObjectStreamException + { + try + { + return CertificateFactory.getInstance(type) + .generateCertPath(new ByteArrayInputStream(data)); + } + catch (CertificateException e) + { + throw (ObjectStreamException) + new NotSerializableException("java.security.cert.CertPath: " + + type).initCause(e); + } + } + } // class CertPathRep + + /** + * Compatible with JDK 1.4+. + */ + private static final long serialVersionUID = 6068470306649138683L; + + /** + * The path type. + * + * @serial the type of all certificates in this path + */ + private final String type; + + /** + * Create a certificate path with the given type. Most code should use + * {@link CertificateFactory} to create CertPaths. + * + * @param type the type of the path + */ + protected CertPath(String type) + { + this.type = type; + } + + /** + * Get the (non-null) type of all certificates in the path. + * + * @return the path certificate type + */ + public String getType() + { + return type; + } + + /** + * Get an immutable iterator over the path encodings (all String names), + * starting with the default encoding. The iterator will throw an + * <code>UnsupportedOperationException</code> if an attempt is made to + * remove items from the list. + * + * @return the iterator of supported encodings in the path + */ + public abstract Iterator<String> getEncodings(); + + /** + * Compares this path to another for semantic equality. To be equal, both + * must be instances of CertPath, with the same type, and identical + * certificate lists. Overriding classes must not change this behavior. + * + * @param o the object to compare to + * @return true if the two are equal + */ + public boolean equals(Object o) + { + if (! (o instanceof CertPath)) + return false; + CertPath cp = (CertPath) o; + return type.equals(cp.type) + && getCertificates().equals(cp.getCertificates()); + } + + /** + * Returns the hashcode of this certificate path. This is defined as:<br> + * <code>31 * getType().hashCode() + getCertificates().hashCode()</code>. + * + * @return the hashcode + */ + public int hashCode() + { + return 31 * type.hashCode() + getCertificates().hashCode(); + } + + public String toString() + { + List l = getCertificates(); + int size = l.size(); + int i = 0; + CPStringBuilder result = new CPStringBuilder(type); + result.append(" Cert Path: length = ").append(size).append(".\n[\n"); + while (--size >= 0) + result.append(l.get(i++)).append('\n'); + return result.append("\n]").toString(); + } + + /** + * Returns the encoded form of this path, via the default encoding. + * + * @return the encoded form + * @throws CertificateEncodingException if encoding fails + */ + public abstract byte[] getEncoded() throws CertificateEncodingException; + + /** + * Returns the encoded form of this path, via the specified encoding. + * + * @param encoding the encoding to use + * @return the encoded form + * @throws CertificateEncodingException if encoding fails or does not exist + */ + public abstract byte[] getEncoded(String encoding) + throws CertificateEncodingException; + + /** + * Returns the immutable, thread-safe list of certificates in this path. + * + * @return the list of certificates, non-null but possibly empty + */ + public abstract List<? extends Certificate> getCertificates(); + + /** + * Serializes the path in its encoded form, to ensure reserialization with + * the appropriate factory object without worrying about list implementation. + * The result will always be an instance of {@link CertPathRep}. + * + * @return the replacement object + * @throws ObjectStreamException if the replacement creation fails + */ + protected Object writeReplace() throws ObjectStreamException + { + try + { + return new CertPathRep(type, getEncoded()); + } + catch (CertificateEncodingException e) + { + throw (ObjectStreamException) + new NotSerializableException("java.security.cert.CertPath: " + + type).initCause(e); + } + } +} // class CertPath |