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package com.sun.crypto.provider;

import java.lang.ref.Reference;
import java.security.MessageDigest;
import java.security.KeyRep;
import java.security.spec.InvalidKeySpecException;
import java.util.Locale;
import javax.crypto.SecretKey;
import javax.crypto.spec.PBEKeySpec;

import jdk.internal.ref.CleanerFactory;

This class represents a PBE key.
Author:Jan Luehe
/** * This class represents a PBE key. * * @author Jan Luehe * */
final class PBEKey implements SecretKey { static final long serialVersionUID = -2234768909660948176L; private byte[] key; private String type;
Creates a PBE key from a given PBE key specification.
Params:
  • keytype – the given PBE key specification
/** * Creates a PBE key from a given PBE key specification. * * @param keytype the given PBE key specification */
PBEKey(PBEKeySpec keySpec, String keytype) throws InvalidKeySpecException { char[] passwd = keySpec.getPassword(); if (passwd == null) { // Should allow an empty password. passwd = new char[0]; } // Accept "\0" to signify "zero-length password with no terminator". if (!(passwd.length == 1 && passwd[0] == 0)) { for (int i=0; i<passwd.length; i++) { if ((passwd[i] < '\u0020') || (passwd[i] > '\u007E')) { throw new InvalidKeySpecException("Password is not ASCII"); } } } this.key = new byte[passwd.length]; for (int i=0; i<passwd.length; i++) this.key[i] = (byte) (passwd[i] & 0x7f); java.util.Arrays.fill(passwd, ' '); type = keytype; // Use the cleaner to zero the key when no longer referenced final byte[] k = this.key; CleanerFactory.cleaner().register(this, () -> java.util.Arrays.fill(k, (byte)0x00)); } public byte[] getEncoded() { // The key is zeroized by finalize() // The reachability fence ensures finalize() isn't called early byte[] result = key.clone(); Reference.reachabilityFence(this); return result; } public String getAlgorithm() { return type; } public String getFormat() { return "RAW"; }
Calculates a hash code value for the object. Objects that are equal will also have the same hashcode.
/** * Calculates a hash code value for the object. * Objects that are equal will also have the same hashcode. */
public int hashCode() { int retval = 0; for (int i = 1; i < this.key.length; i++) { retval += this.key[i] * i; } return(retval ^= getAlgorithm().toLowerCase(Locale.ENGLISH).hashCode()); } public boolean equals(Object obj) { if (obj == this) return true; if (!(obj instanceof SecretKey)) return false; SecretKey that = (SecretKey)obj; if (!(that.getAlgorithm().equalsIgnoreCase(type))) return false; byte[] thatEncoded = that.getEncoded(); boolean ret = MessageDigest.isEqual(this.key, thatEncoded); java.util.Arrays.fill(thatEncoded, (byte)0x00); return ret; }
readObject is called to restore the state of this key from a stream.
/** * readObject is called to restore the state of this key from * a stream. */
private void readObject(java.io.ObjectInputStream s) throws java.io.IOException, ClassNotFoundException { s.defaultReadObject(); key = key.clone(); }
Replace the PBE key to be serialized.
Throws:
Returns:the standard KeyRep object to be serialized
/** * Replace the PBE key to be serialized. * * @return the standard KeyRep object to be serialized * * @throws java.io.ObjectStreamException if a new object representing * this PBE key could not be created */
private Object writeReplace() throws java.io.ObjectStreamException { return new KeyRep(KeyRep.Type.SECRET, getAlgorithm(), getFormat(), getEncoded()); } }