Java 256-bit AES Password-Based Encryption

Question

I need to implement 256 bit AES encryption, but all the examples I have found online use a \"KeyGenerator\" to generate a 256 bit key, but I would like to use my own passkey

Answer 1

Consider using Encryptor4j of which I am the author.

First make sure you have Unlimited Strength Jurisdiction Policy files installed before your proceed so that you can use 256-bit AES keys.

Then do the following:

String password = "mysupersecretpassword"; 
Key key = KeyFactory.AES.keyFromPassword(password.toCharArray());
Encryptor encryptor = new Encryptor(key, "AES/CBC/PKCS7Padding", 16);

You can now use the encryptor to encrypt your message. You can also perform streaming encryption if you'd like. It automatically generates and prepends a secure IV for your convenience.

If it's a file that you wish to compress take a look at this answer Encrypting a large file with AES using JAVA for an even simpler approach.