Encrypts the input based on AES or DES in OFB mode

Text and key must be in hex format, key must be 64 bits long for DES or 128, 192, or 256 bits long for AES, text can be any length

Nonce must be in hex format and must be 64 bits long for DES or 128 bits long for AES

Nonce is optional for encryption but is necessary for decryption