invalid size of IV in cipher block modes

[azadkuh]

in cipher block modes: iv

The size of the IV should be the same as the cipher block size, e.g. 128-bits for AES, Serpent and Camellia.

not every block mode requires that the sizeof(iv) = sizeof(cipher block), for instance:

• gcm and ccm accept variable IV size and some libraries suggest different recommended IV size (12bytes for [aes|aria|camellia]+[gcm|ccm] where block size is 16bytes)

• aes+ecb may be used without any IV (size=0, IV is not being used internally), but other ciphers like [camellia|des|3des|blowfish|aria]+ecb requires that sizeof(iv) = sizeof(cipher block)