// Validate "rgbKey" and "rgbIV" values for a call on
// "CreateDecryptor" or "CreateEncryptor".
internal void ValidateCreate(byte[] rgbKey, byte[] rgbIV)
{
if (rgbKey == null)
{
throw new ArgumentNullException("rgbKey");
}
KeySizes.Validate(LegalKeySizesValue, rgbKey.Length * 8,
"Crypto_InvalidKeySize");
if (rgbIV != null)
{
// Verify the size of the IV against the block size.
if ((rgbIV.Length * 8) != BlockSizeValue)
{
throw new CryptographicException
(_("Crypto_InvalidIVSize"),
rgbIV.Length.ToString());
}
}
else if (ModeValue != CipherMode.ECB)
{
// We must have an IV in every mode except ECB.
throw new ArgumentNullException("rgbIV");
}
}
// Determine if a key size is valid.
public bool ValidKeySize(int bitLength)
{
return(KeySizes.Validate(LegalKeySizesValue, bitLength));
}
