Encryption/Decryption - external data...

Greetings gang...

Does anyone know how to use CryptStandard and DecryptStandard to encrypt and decrypt data that comes from external locations (decrtyping keys and the like)???

I would very dearly like to know what the equivalent of the below would be in WX..

crypto.createHmac ('sha1', 'XXXX')
.update('xxx')
.digest('hex');

(I realise that that is a NodeJS wrapper for OpenSSL, but it is still something I need to know how to emulate)

Any assistance would be greatly appreciated.

C!!!