I use Window 7 with android studio to build my application. I used in facebook SSO for the login system. I follow the steps as the below tutorial.
How to create Android Facebook Key Hash?
I inputted the command as below into my powershell
$ keytool -exportcert -alias androiddebugkey -keystore "C:\Documents and Settings\Administrator.android\debug.keystore" | "C:\OpenSSL\bin\openssl" sha1 -binary |"C:\OpenSSL\bin\openssl" base64
Then the powershell return a hash shorter than 28 chars, which is not accepted by facebook.
How can I generate a key accepted by facebook?