Unity generates Android debug key hash, but it is 24 characters long, required 28

Hi, I want to integrate my Unity Game with Facebook, and made applied all the operations until facebook settings. Once I had an OpenSSL not installed problem, but I overcame it by installing OpenSSL and changing system path. Everything seems ok, but unity generates a key has as follows (which is 24 characters long)

Then I copy the debug key hash to my application settings in facebook developers and have the following error:

The input must be 28 characters long. I am confused...

Thanks in advance.