Take a look at the below document, it will give you a good insight on the support for SHA-2
https://communities.cisco.com/docs/DOC-64548
For TLS v1.0 that is definitely supported starting from v10.0(1) ICM. Refer to UCCE Security Best Practices Guide (by version) from below link:
http://www.cisco.com/c/en/us/support/customer-collaboration/unified-contact-center-enterprise/products-installation-and-configuration-guides-list.html
For v1.2 TLS, I assume that should be supported but it will be good to check with TAC on this for the confirmation.
Regards
Deepak