Hello everybody,

I need to crypt a seed with a 3DES key, but the problem is that this
symmetric key was generated by a smart card and have ony 16 bytes, and
when I try to generate with the following code

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// sample of session key
byte[] keyBytes = {(byte)0x00, (byte)0xE5, (byte)0x14, (byte)0x5F,
(byte)0xA7, (byte)0x45, (byte)0x36, (byte)0x76, (byte)0x31, (byte)0x7D,
(byte)0x4C, (byte)0x38, (byte)0x1C, (byte)0x64, (byte)0xE2,
(byte)0xD2};

KeySpec keyspec = new DESedeKeySpec(keyBytes);

SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("DESede");

SecretKey key = keyfactory.generateSecret(keyspec);
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I get the exception: java.security.InvalidKeyException: Wrong key size
but if the key have 24 bytes it works. So, is possible to make
something like a padding on the key?

Thanks in advance,
Igor Medeiros