All Implemented Interfaces:

KeySpec

public class DESedeKeySpec
extends Object
implements KeySpec 

Since:

1.4

• Field Summary

  Fields

  Modifier and Type	Field	Description
  static int	DES_EDE_KEY_LEN	The constant which defines the length of a DESede key in bytes.

• Constructor Summary

  Constructors

  Constructor	Description
  DESedeKeySpec (byte[] key)	Creates a DESedeKeySpec object using the first 24 bytes in key as the key material for the DES-EDE key.
  DESedeKeySpec (byte[] key, int offset)	Creates a DESedeKeySpec object using the first 24 bytes in key, beginning at offset inclusive, as the key material for the DES-EDE key.

• Method Summary

  All Methods

  Modifier and Type	Method	Description
  byte[]	getKey ()	Returns the DES-EDE key.
  static boolean	isParityAdjusted (byte[] key, int offset)	Checks if the given DES-EDE key, starting at offset inclusive, is parity-adjusted.

  • Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

• Field Detail

  • DES_EDE_KEY_LEN

    public static final int DES_EDE_KEY_LEN

    The constant which defines the length of a DESede key in bytes.

    See Also:

    Constant Field Values

• Constructor Detail

  • DESedeKeySpec

    public DESedeKeySpec(byte[] key)
     throws InvalidKeyException 

    Creates a DESedeKeySpec object using the first 24 bytes in key as the key material for the DES-EDE key.

    The bytes that constitute the DES-EDE key are those between key[0] and key[23] inclusive

    Parameters:

    key - the buffer with the DES-EDE key material. The first 24 bytes of the buffer are copied to protect against subsequent modification.

    Throws:

    NullPointerException - if key is null.

    InvalidKeyException - if the given key material is shorter than 24 bytes.

  • DESedeKeySpec

    public DESedeKeySpec(byte[] key,
     int offset)
     throws InvalidKeyException 

    Creates a DESedeKeySpec object using the first 24 bytes in key, beginning at offset inclusive, as the key material for the DES-EDE key.

    The bytes that constitute the DES-EDE key are those between key[offset] and key[offset+23] inclusive.

    Parameters:

    key - the buffer with the DES-EDE key material. The first 24 bytes of the buffer beginning at offset inclusive are copied to protect against subsequent modification.

    offset - the offset in key, where the DES-EDE key material starts.

    Throws:

    NullPointerException - if key is null.

    InvalidKeyException - if the given key material, starting at offset inclusive, is shorter than 24 bytes

• Method Detail

  • getKey

    public byte[] getKey()

    Returns the DES-EDE key.

    Returns:

    the DES-EDE key. Returns a new array each time this method is called.

  • isParityAdjusted

    public static boolean isParityAdjusted(byte[] key,
     int offset)
     throws InvalidKeyException 

    Checks if the given DES-EDE key, starting at offset inclusive, is parity-adjusted.

    Parameters:

    key - a byte array which holds the key value

    offset - the offset into the byte array

    Returns:

    true if the given DES-EDE key is parity-adjusted, false otherwise

    Throws:

    NullPointerException - if key is null.

    InvalidKeyException - if the given key material, starting at offset inclusive, is shorter than 24 bytes