AES KeyPairGenerator Not Recognised

Question

I have an issue with my java code. I\'m trying to encrypt a file. However, when I run my java code I get \"java.security.InvalidKeyException: Invalid AES key length: 162 byt

Answer 1

As far as I know, AES is symmetric encryption algorithm i.e. it needs only one key for encryption/decryption.

From the JavaDoc of java.security.KeyPairGenerator:

The KeyPairGenerator class is used to generate pairs of public and private keys.

Meaning that it should be used for asymmetric encryption algorithms. For symmetric encryption algorithms one should use javax.crypto.KeyGenerator.

However, I advise simply mimicking some tutorial on how to encrypt / decrypt byte array in Java using AES like this one.

It uses sun.misc.Base64Encoder / Base64Decoder classes to encode / decode byte array to / from String, however you may skip this step.

Hope this helps