File	Doc	Category	Size	Date	Package
PBEKeySpec.java	API Doc	Android 1.5 API	6662	Wed May 06 22:41:02 BST 2009	javax.crypto.spec

PBEKeySpec

• java.lang.Object

Fields Summary
private char[]	password
private final byte[]	salt
private final int	iterationCount
private final int	keyLength

Constructors Summary
public PBEKeySpec(char[] password) Creates a new PBEKeySpec with the specified password. param password the password. if (password == null) { this.password = new char[0]; } else { this.password = new char[password.length]; System.arraycopy(password, 0, this.password, 0, password.length); } salt = null; iterationCount = 0; keyLength = 0;
public PBEKeySpec(char[] password, byte[] salt, int iterationCount, int keyLength) Creates a new PBEKeySpec with the specified password, salt, iteration count and the desired length of the derived key. param password the password. param salt the salt. param iterationCount the iteration count. param keyLength the desired key length of the derived key, throws NullPointerException if the salt is null. throws IllegalArgumentException if the salt is empty, iteration count is zero or negative or the key length is zero or negative. if (salt == null) { throw new NullPointerException(Messages.getString("crypto.3B")); //$NON-NLS-1$ } if (salt.length == 0) { throw new IllegalArgumentException(Messages.getString("crypto.3C")); //$NON-NLS-1$ } if (iterationCount <= 0) { throw new IllegalArgumentException( Messages.getString("crypto.3D")); //$NON-NLS-1$ } if (keyLength <= 0) { throw new IllegalArgumentException(Messages.getString("crypto.3E")); //$NON-NLS-1$ } if (password == null) { this.password = new char[0]; } else { this.password = new char[password.length]; System.arraycopy(password, 0, this.password, 0, password.length); } this.salt = new byte[salt.length]; System.arraycopy(salt, 0, this.salt, 0, salt.length); this.iterationCount = iterationCount; this.keyLength = keyLength;
public PBEKeySpec(char[] password, byte[] salt, int iterationCount) Creates a new PBEKeySpec with the specified password, salt and iteration count. param password the password. param salt the salt. param iterationCount the iteration count. throws NullPointerException if salt is null. throws IllegalArgumentException if the salt is empty or iteration count is zero or negative. if (salt == null) { throw new NullPointerException(Messages.getString("crypto.3B")); //$NON-NLS-1$ } if (salt.length == 0) { throw new IllegalArgumentException(Messages.getString("crypto.3C")); //$NON-NLS-1$ } if (iterationCount <= 0) { throw new IllegalArgumentException( Messages.getString("crypto.3D")); //$NON-NLS-1$ } if (password == null) { this.password = new char[0]; } else { this.password = new char[password.length]; System.arraycopy(password, 0, this.password, 0, password.length); } this.salt = new byte[salt.length]; System.arraycopy(salt, 0, this.salt, 0, salt.length); this.iterationCount = iterationCount; this.keyLength = 0;

Methods Summary
public final void	clearPassword() Clears the password by overwriting it. Arrays.fill(password, '?"); password = null;
public final int	getIterationCount() Returns the iteration count of this key specification. return the iteration count of this key specification. return iterationCount;
public final int	getKeyLength() Returns the desired key length of the derived key. return the desired key length of the derived key. return keyLength;
public final char[]	getPassword() Returns a copy of the password of this key specification. return a copy of the password of this key specification. throws IllegalStateException if the password has been cleared before. if (password == null) { throw new IllegalStateException(Messages.getString("crypto.3F")); //$NON-NLS-1$ } char[] result = new char[password.length]; System.arraycopy(password, 0, result, 0, password.length); return result;
public final byte[]	getSalt() Returns a copy of the salt of this key specification. return a copy of the salt of this key specification or null if none is specified. if (salt == null) { return null; } byte[] result = new byte[salt.length]; System.arraycopy(salt, 0, result, 0, salt.length); return result;