input buffer too short about encrypt

[leocavalcante]

This is the same as #8

This is a "limitation" of the Block cipher specification, as the name says, it operate on blocks, fixed-length blocks, which means fixed-length sizes for both input and key. You should pad your input.
https://en.wikipedia.org/wiki/Block_cipher

If padding is a issue, you can try a Stream cipher, like Salsa20.

[alexlovar]

oh, thanks

[somdipdey]

Anyone knows how to modify the aforementioned code to encrypt and decrypt string messages using my own password using Salsa20?

How to modify this code for Salsa20->

final key = 'my32lengthsupersecretnooneknows1';
final encrypter = new Encrypter(new AES(key));
final plainText = content.toString();
print('plainText: '+plainText);
final encryptedText = encrypter.encrypt(plainText);
print('encrypt: '+encryptedText);