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CodeSigner.java
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173 lines (157 loc) · 4.17 KB
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/*
* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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*/
package java.security;
import java.io.*;
import java.security.cert.CertPath;
/**
* This class encapsulates information about a code signer.
* It is immutable.
*
* @since 1.5
* @author Vincent Ryan
*/
public final class CodeSigner implements Serializable {
private static final long serialVersionUID = 6819288105193937581L;
/**
* The signer's certificate path.
*
* @serial
*/
private CertPath signerCertPath;
/*
* The signature timestamp.
*
* @serial
*/
private Timestamp timestamp;
/*
* Hash code for this code signer.
*/
private transient int myhash = -1;
/**
* Constructs a CodeSigner object.
*
* @param signerCertPath The signer's certificate path.
* It must not be {@code null}.
* @param timestamp A signature timestamp.
* If {@code null} then no timestamp was generated
* for the signature.
* @throws NullPointerException if {@code signerCertPath} is
* {@code null}.
*/
public CodeSigner(CertPath signerCertPath, Timestamp timestamp) {
if (signerCertPath == null) {
throw new NullPointerException();
}
this.signerCertPath = signerCertPath;
this.timestamp = timestamp;
}
/**
* Returns the signer's certificate path.
*
* @return A certificate path.
*/
public CertPath getSignerCertPath() {
return signerCertPath;
}
/**
* Returns the signature timestamp.
*
* @return The timestamp or {@code null} if none is present.
*/
public Timestamp getTimestamp() {
return timestamp;
}
/**
* Returns the hash code value for this code signer.
* The hash code is generated using the signer's certificate path and the
* timestamp, if present.
*
* @return a hash code value for this code signer.
*/
public int hashCode() {
if (myhash == -1) {
if (timestamp == null) {
myhash = signerCertPath.hashCode();
} else {
myhash = signerCertPath.hashCode() + timestamp.hashCode();
}
}
return myhash;
}
/**
* Tests for equality between the specified object and this
* code signer. Two code signers are considered equal if their
* signer certificate paths are equal and if their timestamps are equal,
* if present in both.
*
* @param obj the object to test for equality with this object.
*
* @return true if the objects are considered equal, false otherwise.
*/
public boolean equals(Object obj) {
if (obj == null || (!(obj instanceof CodeSigner))) {
return false;
}
CodeSigner that = (CodeSigner)obj;
if (this == that) {
return true;
}
Timestamp thatTimestamp = that.getTimestamp();
if (timestamp == null) {
if (thatTimestamp != null) {
return false;
}
} else {
if (thatTimestamp == null ||
(! timestamp.equals(thatTimestamp))) {
return false;
}
}
return signerCertPath.equals(that.getSignerCertPath());
}
/**
* Returns a string describing this code signer.
*
* @return A string comprising the signer's certificate and a timestamp,
* if present.
*/
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append("(");
sb.append("Signer: " + signerCertPath.getCertificates().get(0));
if (timestamp != null) {
sb.append("timestamp: " + timestamp);
}
sb.append(")");
return sb.toString();
}
// Explicitly reset hash code value to -1
private void readObject(ObjectInputStream ois)
throws IOException, ClassNotFoundException {
ois.defaultReadObject();
myhash = -1;
}
}