UPDATED: New version works with Plasma5. MD5, SHA1 and SHA256 checksums supported.
Simple desktop file that adds checking md5sum, sha1 and sha256 to Dolphin via right clicking on any iso file.
To enable this function for all users, copy file to /usr/share/kservices5/ServiceMenus/.
For single user only access ~/.local/share/kservices5/ServiceMenus/ (your distro may use a slightly different location).
In either case make sure it's executable.
If you prefer to have the function available for all filetypes rather than just iso's - simply change the line
If you prefer Clipboard rather than Notifier, install xsel and change the Exec line to:
Exec=md5sum %F | xsel -b
REQUIRES: libnotify-bin, xsel