AES decryption returning empty string

The problem appears to be that the encrypted value doesn't survive the base 64 encoding/decoding process. If I do this:

 

 

when RULE_INIT {

 

set ::key [AES::key 256]

 

set stringtoencrypt "Testing encryption"

 

set encrypted [AES::encrypt $::key $stringtoencrypt]

 

log local0. "Encrypted $encrypted"

 

set decrypted [AES::decrypt $::key $encrypted]

 

log local0. "Decrypted $decrypted"

 

}

 

 

then it works but if I am going to put an encrypted value in a cookie I would think it would need it to be encoded.