How to calculate SHA for unsigned int instead of string with ippcp

I am trying to calculate SHA256 and SHA384 for message of type unsigned integer, but from the Intel® Integrated Performance
Primitives Cryptography Developer Reference I see that all the relevant functions receive only pointer to octet string (Ipp8u*) as message.

How can I use it with pointer to unsigned int message (Ipp32u and Ipp64u)?

Thanks