/// <summary>
/// NetTriplsDESEncryption constructor
/// </summary>
public NetTripleDESEncryption(string key, int bitsize)
{
if (!s_keysizes.Contains(bitsize))
{
throw new NetException(string.Format("Not a valid key size. (Valid values are: {0})", NetUtility.MakeCommaDelimitedList(s_keysizes)));
}
byte[] entropy = Encoding.UTF32.GetBytes(key);
// I know hardcoding salts is bad, but in this case I think it is acceptable.
HMACSHA512 hmacsha512 = new HMACSHA512(Convert.FromBase64String("i88NEiez3c50bHqr3YGasDc4p8jRrxJAaiRiqixpvp4XNAStP5YNoC2fXnWkURtkha6M8yY901Gj07IRVIRyGL=="));
hmacsha512.Initialize();
for (int i = 0; i < 1000; i++)
{
entropy = hmacsha512.ComputeHash(entropy);
}
int keylen = bitsize / 8;
m_key = new byte[keylen];
Buffer.BlockCopy(entropy, 0, m_key, 0, keylen);
m_iv = new byte[s_blocksizes[0] / 8];
Buffer.BlockCopy(entropy, entropy.Length - m_iv.Length - 1, m_iv, 0, m_iv.Length);
m_bitSize = bitsize;
}
/// <summary>
/// NetTriplsDESEncryption constructor
/// </summary>
public NetTripleDESEncryption(byte[] key, byte[] iv)
{
if (!s_keysizes.Contains(key.Length * 8))
{
throw new NetException(string.Format("Not a valid key size. (Valid values are: {0})", NetUtility.MakeCommaDelimitedList(s_keysizes)));
}
if (!s_blocksizes.Contains(iv.Length * 8))
{
throw new NetException(string.Format("Not a valid iv size. (Valid values are: {0})", NetUtility.MakeCommaDelimitedList(s_blocksizes)));
}
m_key = key;
m_iv = iv;
m_bitSize = m_key.Length * 8;
}