public DESedeKeySpec(byte[] key) throws InvalidKeyException 
{
                                                                                    
        this(key, 0);
}

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.

exception: NullPointerException - if key is null.

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

 public DESedeKeySpec(byte[] key,
    int offset) throws InvalidKeyException 
{
        if (key.length - offset <  24) {
            throw new InvalidKeyException("Wrong key size");
        }
        this.key = new byte[24];
        System.arraycopy(key, offset, this.key, 0, 24);
}

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

exception: NullPointerException - if key is null.

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

 public byte[] getKey() 
{
        return (byte[])this.key.clone();
}

Returns the DES-EDE key.

 public static boolean isParityAdjusted(byte[] key,
    int offset) throws InvalidKeyException 
{
            if (key.length - offset <  24) {
                throw new InvalidKeyException("Wrong key size");
            }
            if (DESKeySpec.isParityAdjusted(key, offset) == false
                || DESKeySpec.isParityAdjusted(key, offset + 8) == false
                || DESKeySpec.isParityAdjusted(key, offset + 16) == false) {
                return false;
            }
            return true;
}

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