-callback block_decrypt(Cipher, Key, CipherText) -> PlainText | error
                           when
                               Cipher :: {atom(), pos_integer()},
                               Key :: bitstring(),
                               CipherText :: binary(),
                               PlainText :: binary().

-callback block_decrypt(Cipher, Key, IV, CipherText) -> PlainText | error
                           when
                               Cipher :: {atom(), pos_integer()},
                               Key :: bitstring(),
                               IV :: bitstring(),
                               CipherText :: binary() | {binary(), binary(), binary()},
                               PlainText :: binary().

-callback block_encrypt(Cipher, Key, PlainText) -> CipherText
                           when
                               Cipher :: {atom(), pos_integer()},
                               Key :: bitstring(),
                               PlainText :: binary(),
                               CipherText :: binary().

-callback block_encrypt(Cipher, Key, IV, PlainText) -> CipherText
                           when
                               Cipher :: {atom(), pos_integer()},
                               Key :: bitstring(),
                               IV :: bitstring(),
                               PlainText :: binary() | {binary(), binary()},
                               CipherText :: binary() | {binary(), binary()}.