PBKDF2 double hash

[Jack19001]

Hi,

I have the following code:

var outcome1Hex = PBKDF2(passphrase, salt, SHA256);
var outcome2Hex = PBKDF2(outcome1Hex, salt, SHA256);

The first line can be easily be done with mode 10900 (by using base64 instead of hex), but I need te second one. Is there anyway those two can be combined / piped or is it only possible by writing a kernel? Any sugestions are welcome

sample:
passphrase = hashcat
salt = test
iterations = 1024
outcome1Hex  = 9976c830a3341e6e8adad9f44100ad80a018039937af6df5eeae76a2c725b626
outcome2Hex = a1752736932e8806104a7d93b52540c09696d89f9955518aa64ccb4e66d0504c   (<-- this is the one iam interested in)

Thanks!