Hi Kbergh-8431,
The visual studio 2017 doesn't support IOS installer, and there is no related updated package which is like visual studio 2015. So I'm afraid that there are no any hash values for visual studio 2017 on the Microsoft website.
Modified:
We suggest you could use '-verify' argument to check if offline installation files are either missing or invalid. It will read some important metadata in the offline cache supplied. The commnad: "vs_professional.exe --layout <layoutDir> --verify".
You could refer to more details here: Verify a layout
Best Regards,
Dylan