Natural and Blowfish(or other) encryption

Good Day All,

I have a requirement for B2B integration from our Natural (AIX) application. I want to use the REQUEST DOCUMENT to consume a webservice, but the webservice will expect the data to be encrypted using BLOWFISH and agreed to keys.
I know I can use an entireX service (or my own webservice) to act as an intermediary, to convert the data, but can I bind something to the natural nucleus which would allow me to call target webservice directly?

Natural Version
AIX 6.1
EntireX 8.2.2