/// <exception cref="System.Exception"></exception>
public override void Init(int mode, byte[] key, byte[] iv)
{
string pad = "NoPadding";
//if(padding) pad="PKCS5Padding";
byte[] tmp;
if (iv.Length > ivsize)
{
tmp = new byte[ivsize];
System.Array.Copy(iv, 0, tmp, 0, tmp.Length);
iv = tmp;
}
if (key.Length > bsize)
{
tmp = new byte[bsize];
System.Array.Copy(key, 0, tmp, 0, tmp.Length);
key = tmp;
}
try
{
cipher = Sharpen.Cipher.GetInstance("DESede/CTR/" + pad);
DESedeKeySpec keyspec = new DESedeKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory.GetInstance("DESede");
SecretKey _key = keyfactory.GenerateSecret(keyspec);
cipher.Init((mode == ENCRYPT_MODE ? Sharpen.Cipher.ENCRYPT_MODE : Sharpen.Cipher.
DECRYPT_MODE), _key, new IvParameterSpec(iv));
}
catch (Exception e)
{
cipher = null;
throw;
}
}
public override SecretKey GenerateSecret(KeySpec key)
{
DESedeKeySpec ks = (DESedeKeySpec)key;
return(new SecretKey(ks.Key));
}