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class:DESedeKeySpec [NONE]
All Implemented Interfaces:
KeySpec
public class DESedeKeySpecextends Object implements KeySpec
This class specifies a DES-EDE ("triple-DES") key.
Since:
1.4

field:DES_EDE_KEY_LEN [NONE]

  • 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:

constructor:DESedeKeySpec(byte[]) [NONE]

  • 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.

    • constructor:DESedeKeySpec(byte[],int) [NONE]

    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:getKey() [NONE]

  • getKey

    public byte[] getKey()
    Returns the DES-EDE key.
    Returns:
    the DES-EDE key. Returns a new array each time this method is called.

    • method:isParityAdjusted(byte[],int) [NONE]

    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

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