Generate Hash Key For Facebook 

In order to generate key hash you need to follow some easy steps.

1) Download Openssl from: http://code.google.com/p/openssl-for-windows/downloads/list

2) Make a openssl folder in C drive

3) Extract Zip files into openssl folder

4) Copy the File debug.keystore from .android folder in my case (C:\Users\SYSTEM.android) and paste into JDK bin Folder in my case (C:\Program Files\Java\jdk1.6.0_05\bin)

5) Open command prompt and give the path of JDK Bin folder in my case (C:\Program Files\Java\jdk1.6.0_05\bin).

6) Copy the code and hit enter keytool -exportcert -alias androiddebugkey -keystore debug.keystore > c:\openssl\bin\debug.txt

7) Now you need to enter password, Password = android.

8) See in openssl Bin folder you will get a file with the name of debug.txt

9) Now either you can restart command prompt or work with existing command prompt

10) comes to C drive and give the path of openssl Bin folder

11) copy the following code and paste openssl sha1 -binary debug.txt > debug_sha.txt

12) you will get debug_sha.txt in openssl bin folder

13) Again copy following code and paste openssl base64 -in debug_sha.txt > debug_base64.txt

14) you will get debug_base64.txt in openssl bin folder

15) open debug_base64.txt file Here is your Key hash.

Hope This Help....................