Huge file hash

[Gnu]

I basically know how to get the MD5 value of a small-to-medium string, but
how should I calculate it on a huge file, one that I can't bring in memory
(say 10, 20 Gb)?
Does anyone know how I should "partition" this operation?

Thanks a lot for your time,
GNU

 

[Gianni Mariani]

I basically know how to get the MD5 value of a small-to-medium string, but
how should I calculate it on a huge file, one that I can't bring in memory
(say 10, 20 Gb)?
Does anyone know how I should "partition" this operation?

This is not a C++ question. You'd be better off trying a crypto or
general programming group.

Do you really need an md5 ? md5 is pretty expensive computationally.