author | erikj |
Tue, 12 Sep 2017 19:03:39 +0200 | |
changeset 47216 | 71c04702a3d5 |
parent 45118 | jdk/src/java.base/share/classes/java/security/cert/CertPath.java@e4258d800b54 |
child 57950 | 4612a3cfb927 |
child 58678 | 9cf78a70fa4f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.security.cert; |
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import java.io.ByteArrayInputStream; |
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import java.io.NotSerializableException; |
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import java.io.ObjectStreamException; |
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import java.io.Serializable; |
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import java.util.Iterator; |
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import java.util.List; |
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/** |
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* An immutable sequence of certificates (a certification path). |
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* <p> |
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* This is an abstract class that defines the methods common to all |
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* {@code CertPath}s. Subclasses can handle different kinds of |
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* certificates (X.509, PGP, etc.). |
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* <p> |
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* All {@code CertPath} objects have a type, a list of |
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* {@code Certificate}s, and one or more supported encodings. Because the |
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* {@code CertPath} class is immutable, a {@code CertPath} cannot |
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* change in any externally visible way after being constructed. This |
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* stipulation applies to all public fields and methods of this class and any |
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* added or overridden by subclasses. |
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* <p> |
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* The type is a {@code String} that identifies the type of |
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* {@code Certificate}s in the certification path. For each |
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* certificate {@code cert} in a certification path {@code certPath}, |
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* {@code cert.getType().equals(certPath.getType())} must be |
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* {@code true}. |
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* <p> |
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* The list of {@code Certificate}s is an ordered {@code List} of |
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* zero or more {@code Certificate}s. This {@code List} and all |
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* of the {@code Certificate}s contained in it must be immutable. |
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* <p> |
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* Each {@code CertPath} object must support one or more encodings |
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* so that the object can be translated into a byte array for storage or |
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* transmission to other parties. Preferably, these encodings should be |
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* well-documented standards (such as PKCS#7). One of the encodings supported |
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* by a {@code CertPath} is considered the default encoding. This |
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* encoding is used if no encoding is explicitly requested (for the |
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* {@link #getEncoded() getEncoded()} method, for instance). |
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* <p> |
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* All {@code CertPath} objects are also {@code Serializable}. |
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* {@code CertPath} objects are resolved into an alternate |
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* {@link CertPathRep CertPathRep} object during serialization. This allows |
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* a {@code CertPath} object to be serialized into an equivalent |
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* representation regardless of its underlying implementation. |
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* <p> |
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* {@code CertPath} objects can be created with a |
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* {@code CertificateFactory} or they can be returned by other classes, |
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* such as a {@code CertPathBuilder}. |
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* <p> |
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* By convention, X.509 {@code CertPath}s (consisting of |
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* {@code X509Certificate}s), are ordered starting with the target |
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* certificate and ending with a certificate issued by the trust anchor. That |
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* is, the issuer of one certificate is the subject of the following one. The |
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* certificate representing the {@link TrustAnchor TrustAnchor} should not be |
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* included in the certification path. Unvalidated X.509 {@code CertPath}s |
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* may not follow these conventions. PKIX {@code CertPathValidator}s will |
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* detect any departure from these conventions that cause the certification |
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* path to be invalid and throw a {@code CertPathValidatorException}. |
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* |
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* <p> Every implementation of the Java platform is required to support the |
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* following standard {@code CertPath} encodings: |
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* <ul> |
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* <li>{@code PKCS7}</li> |
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* <li>{@code PkiPath}</li> |
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* </ul> |
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* These encodings are described in the <a href= |
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* "{@docRoot}/../specs/security/standard-names.html#certpath-encodings"> |
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* CertPath Encodings section</a> of the |
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* Java Security Standard Algorithm Names Specification. |
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* Consult the release documentation for your implementation to see if any |
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* other encodings are supported. |
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* <p> |
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* <b>Concurrent Access</b> |
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* <p> |
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* All {@code CertPath} objects must be thread-safe. That is, multiple |
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* threads may concurrently invoke the methods defined in this class on a |
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* single {@code CertPath} object (or more than one) with no |
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* ill effects. This is also true for the {@code List} returned by |
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* {@code CertPath.getCertificates}. |
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* <p> |
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* Requiring {@code CertPath} objects to be immutable and thread-safe |
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* allows them to be passed around to various pieces of code without worrying |
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* about coordinating access. Providing this thread-safety is |
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* generally not difficult, since the {@code CertPath} and |
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* {@code List} objects in question are immutable. |
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* |
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* @see CertificateFactory |
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* @see CertPathBuilder |
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* |
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* @author Yassir Elley |
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* @since 1.4 |
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*/ |
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public abstract class CertPath implements Serializable { |
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private static final long serialVersionUID = 6068470306649138683L; |
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private String type; // the type of certificates in this chain |
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/** |
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* Creates a {@code CertPath} of the specified type. |
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* <p> |
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* This constructor is protected because most users should use a |
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* {@code CertificateFactory} to create {@code CertPath}s. |
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* |
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* @param type the standard name of the type of |
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* {@code Certificate}s in this path |
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*/ |
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protected CertPath(String type) { |
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this.type = type; |
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} |
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/** |
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* Returns the type of {@code Certificate}s in this certification |
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* path. This is the same string that would be returned by |
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* {@link java.security.cert.Certificate#getType() cert.getType()} |
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* for all {@code Certificate}s in the certification path. |
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* |
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* @return the type of {@code Certificate}s in this certification |
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* path (never null) |
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*/ |
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public String getType() { |
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return type; |
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} |
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/** |
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* Returns an iteration of the encodings supported by this certification |
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* path, with the default encoding first. Attempts to modify the returned |
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* {@code Iterator} via its {@code remove} method result in an |
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* {@code UnsupportedOperationException}. |
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* |
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* @return an {@code Iterator} over the names of the supported |
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* encodings (as Strings) |
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*/ |
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public abstract Iterator<String> getEncodings(); |
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/** |
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* Compares this certification path for equality with the specified |
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* object. Two {@code CertPath}s are equal if and only if their |
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* types are equal and their certificate {@code List}s (and by |
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* implication the {@code Certificate}s in those {@code List}s) |
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* are equal. A {@code CertPath} is never equal to an object that is |
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* not a {@code CertPath}. |
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* <p> |
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* This algorithm is implemented by this method. If it is overridden, |
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* the behavior specified here must be maintained. |
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* |
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* @param other the object to test for equality with this certification path |
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* @return true if the specified object is equal to this certification path, |
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* false otherwise |
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*/ |
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public boolean equals(Object other) { |
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if (this == other) |
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return true; |
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if (! (other instanceof CertPath)) |
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return false; |
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CertPath otherCP = (CertPath) other; |
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if (! otherCP.getType().equals(type)) |
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return false; |
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List<? extends Certificate> thisCertList = this.getCertificates(); |
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List<? extends Certificate> otherCertList = otherCP.getCertificates(); |
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return(thisCertList.equals(otherCertList)); |
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} |
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/** |
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* Returns the hashcode for this certification path. The hash code of |
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* a certification path is defined to be the result of the following |
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* calculation: |
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* <pre>{@code |
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* hashCode = path.getType().hashCode(); |
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* hashCode = 31*hashCode + path.getCertificates().hashCode(); |
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* }</pre> |
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* This ensures that {@code path1.equals(path2)} implies that |
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* {@code path1.hashCode()==path2.hashCode()} for any two certification |
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* paths, {@code path1} and {@code path2}, as required by the |
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* general contract of {@code Object.hashCode}. |
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* |
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* @return the hashcode value for this certification path |
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*/ |
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public int hashCode() { |
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int hashCode = type.hashCode(); |
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hashCode = 31*hashCode + getCertificates().hashCode(); |
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return hashCode; |
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} |
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/** |
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* Returns a string representation of this certification path. |
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* This calls the {@code toString} method on each of the |
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* {@code Certificate}s in the path. |
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* |
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* @return a string representation of this certification path |
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*/ |
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public String toString() { |
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StringBuilder sb = new StringBuilder(); |
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Iterator<? extends Certificate> stringIterator = |
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getCertificates().iterator(); |
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sb.append("\n" + type + " Cert Path: length = " |
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+ getCertificates().size() + ".\n"); |
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sb.append("[\n"); |
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int i = 1; |
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while (stringIterator.hasNext()) { |
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sb.append("==========================================" |
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+ "===============Certificate " + i + " start.\n"); |
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Certificate stringCert = stringIterator.next(); |
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sb.append(stringCert.toString()); |
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sb.append("\n========================================" |
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+ "=================Certificate " + i + " end.\n\n\n"); |
|
238 |
i++; |
|
239 |
} |
|
240 |
||
241 |
sb.append("\n]"); |
|
242 |
return sb.toString(); |
|
243 |
} |
|
244 |
||
245 |
/** |
|
246 |
* Returns the encoded form of this certification path, using the default |
|
247 |
* encoding. |
|
248 |
* |
|
249 |
* @return the encoded bytes |
|
250 |
* @exception CertificateEncodingException if an encoding error occurs |
|
251 |
*/ |
|
252 |
public abstract byte[] getEncoded() |
|
253 |
throws CertificateEncodingException; |
|
254 |
||
255 |
/** |
|
256 |
* Returns the encoded form of this certification path, using the |
|
257 |
* specified encoding. |
|
258 |
* |
|
259 |
* @param encoding the name of the encoding to use |
|
260 |
* @return the encoded bytes |
|
261 |
* @exception CertificateEncodingException if an encoding error occurs or |
|
262 |
* the encoding requested is not supported |
|
263 |
*/ |
|
264 |
public abstract byte[] getEncoded(String encoding) |
|
265 |
throws CertificateEncodingException; |
|
266 |
||
267 |
/** |
|
268 |
* Returns the list of certificates in this certification path. |
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* The {@code List} returned must be immutable and thread-safe. |
2 | 270 |
* |
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* @return an immutable {@code List} of {@code Certificate}s |
2 | 272 |
* (may be empty, but not null) |
273 |
*/ |
|
274 |
public abstract List<? extends Certificate> getCertificates(); |
|
275 |
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276 |
/** |
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* Replaces the {@code CertPath} to be serialized with a |
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* {@code CertPathRep} object. |
2 | 279 |
* |
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* @return the {@code CertPathRep} to be serialized |
2 | 281 |
* |
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* @throws ObjectStreamException if a {@code CertPathRep} object |
2 | 283 |
* representing this certification path could not be created |
284 |
*/ |
|
285 |
protected Object writeReplace() throws ObjectStreamException { |
|
286 |
try { |
|
287 |
return new CertPathRep(type, getEncoded()); |
|
288 |
} catch (CertificateException ce) { |
|
289 |
NotSerializableException nse = |
|
290 |
new NotSerializableException |
|
291 |
("java.security.cert.CertPath: " + type); |
|
292 |
nse.initCause(ce); |
|
293 |
throw nse; |
|
294 |
} |
|
295 |
} |
|
296 |
||
297 |
/** |
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* Alternate {@code CertPath} class for serialization. |
2 | 299 |
* @since 1.4 |
300 |
*/ |
|
301 |
protected static class CertPathRep implements Serializable { |
|
302 |
||
303 |
private static final long serialVersionUID = 3015633072427920915L; |
|
304 |
||
305 |
/** The Certificate type */ |
|
306 |
private String type; |
|
307 |
/** The encoded form of the cert path */ |
|
308 |
private byte[] data; |
|
309 |
||
310 |
/** |
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* Creates a {@code CertPathRep} with the specified |
2 | 312 |
* type and encoded form of a certification path. |
313 |
* |
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* @param type the standard name of a {@code CertPath} type |
2 | 315 |
* @param data the encoded form of the certification path |
316 |
*/ |
|
317 |
protected CertPathRep(String type, byte[] data) { |
|
318 |
this.type = type; |
|
319 |
this.data = data; |
|
320 |
} |
|
321 |
||
322 |
/** |
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* Returns a {@code CertPath} constructed from the type and data. |
2 | 324 |
* |
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* @return the resolved {@code CertPath} object |
2 | 326 |
* |
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* @throws ObjectStreamException if a {@code CertPath} could not |
2 | 328 |
* be constructed |
329 |
*/ |
|
330 |
protected Object readResolve() throws ObjectStreamException { |
|
331 |
try { |
|
332 |
CertificateFactory cf = CertificateFactory.getInstance(type); |
|
333 |
return cf.generateCertPath(new ByteArrayInputStream(data)); |
|
334 |
} catch (CertificateException ce) { |
|
335 |
NotSerializableException nse = |
|
336 |
new NotSerializableException |
|
337 |
("java.security.cert.CertPath: " + type); |
|
338 |
nse.initCause(ce); |
|
339 |
throw nse; |
|
340 |
} |
|
341 |
} |
|
342 |
} |
|
343 |
} |