Key hash for Facebook Android SDK

Question

I can't figure out how to get the Key Hash required to use the Facebook Android SDK. I figured out that I can use keytool with these commands:

  keytool -exportcert -alias [alias]
 -keystore [keystore] | openssl sha1 -binary | openssl enc -a -e

The only problem is that I have no idea where to insert this, I tried through command windows (win7) and I tried opening the file keytool.exe.

Solution 1

1. Download and install OpenSSL from http://slproweb.com/products/Win32OpenSSL.html based on windows 32 or 64 bit.(Note: Download and install first visual C++ 208 redisributable from that site also )
2. Put the bin directory of installed OpenSSL in windows path.
3. Open the command prompt and go to C:\Users{User_Name}.android
4. now put this command on cmd "keytool -exportcert -alias androiddebugkey -keystore debug.keystore | openssl sha1 -binary | openssl base64".(refer https://developers.facebook.com/docs/android/getting-started#samples)
5. Now enter password "facebook" without double quote.
6. Now a hash key will be generated
7. Finally go to the Facebook Developer site. Make sure you are logged into Facebook and, using the dropdown menu in the top-right, go to your 'Developer Settings':
8. Once you're in your developer settings, select 'Sample App' from the navigation on the left, and add and save your key hash into your profile:

Solution 2

You can install Open SSL from here , that should make your command work

Solution 3

I created a batch script facebookkeydebug.bat, which return desired Facebook key hash. Just edit the script, set correct paths, keystore name and run it.

:: Getting Android key hash for Facebook app on Windows
:: Requirement: OpenSSL for Windows (http://code.google.com/p/openssl-for-windows/downloads/list)
:: Usage: set paths and run facebookkeydebug.bat

@echo Exporting keystore cert
keytool -exportcert -alias androiddebugkey -keystore C:\Users\myusername\.android\debug.keystore -storepass android -keypass android > debug.keystore.bin

@echo Converting to sha1
C:\PROGRAMS\openssl-0.9.8k_X64\bin\openssl sha1 -binary debug.keystore.bin > debug.keystore.sha1

@echo Converting to base64
C:\PROGRAMS\openssl-0.9.8k_X64\bin\openssl base64 -in debug.keystore.sha1 -out debug.keystore.base64

@echo Done, Android hash key for Facebook app is:
C:\PROGRAMS\openssl-0.9.8k_X64\bin\openssl base64 -in debug.keystore.sha1
@pause

EDIT: I published a repo with some batch scripts for signing and getting cert keys on Windows: https://github.com/petrnohejl/Android-Scripts

Solution 4

you can use code below to get the Hash key :

try {

   PackageInfo info = getPackageManager().getPackageInfo(getPackageName(), PackageManager.GET_SIGNATURES);

   for (Signature signature : info.signatures) 
   {
    MessageDigest md = MessageDigest.getInstance("SHA");
    md.update(signature.toByteArray());
    Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
   }

  } catch (NameNotFoundException e) {
   Log.e("name not found", e.toString());
  } catch (NoSuchAlgorithmException e) {
   Log.e("no such an algorithm", e.toString());
  }

Reference :

http://limbaniandroid.blogspot.com/2013/04/how-to-get-hash-key-for-integarte.html

Solution 5

To make things easier -

keytool.exe -list -alias androiddebugkey -keystore debug.keystore -v

this should provide you with the fingerprints needed, without the hassle of installing openssl.

e.g.

Certificate fingerprints:
         MD5:  1A:5E:AA:CB:1A:CF:68:F0:8B:DA:D8:BC:EE:4F:BF:EE
         SHA1: D2:89:D1:5A:BC:F8:E3:E5:62:4D:DD:20:DD:96:CD:AB:51:A1:C1:7F
         Signature algorithm name: SHA1withRSA
         Version: 3

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Comments

[Anders]

Allright! I did a stupid mistake, I navigated one folder from where the keytool was. So, I got a lot of jibberish in return and didn't get the opportunity to enter the openssl. Is this also a program I have installed?

[Falmarri]

Keytool I think is installed with the java jdk. I'm not sure if it's in your path though, I don't work on windows. Also, I'm not sure if openssl is installed by default either. Again, that MIGHT be the linux instructions. Are you sure that's the only thing the document says? It doesn't say what you need to have installed, etc

[Anders]

I navigated myself to the keytool file, and the first command worked. But, when using the openssl i got an error stating that the program couldn't be found. The instructions are here: github.com/facebook/facebook-android-sdk/blob/master/README.‌​md under "single sign-on"

[Anders]

For others: It is way more simpler if you keep the keytool and OpenSSL files in the same folder.

[Blundell]

Yeah openssl ISNT installed by default on Windows, facebook sdk tutorial doesn't mention this

[maephisto]

yes, just copy the content of the openssl archive in your jdk1.x.0 folder

[Paresh Mayani]

+1 Its working. I am now able to run the command with Openssl.

[sandyiscool]

Thanks a lot !! Saved a lot of my time :)

[Umer]

but here we needed is Key hash not fingerprints.

[Mehmed]

This one differs from the key generated by keytool code with password "android". Why?

[Apurva]

I have generated the key hash but don't know where to put that key, would you guide me?

[Apurva]

I have generated the key hash but don't know where to put that key, would you guide me?

[Apurva]

I have generated the key hash but don't know where to put that key, would you guide me?

[Apurva]

I have generated the key hash but don't know where to put that key, would you guide me?

[Apurva]

I have generated the key hash but don't know where to put that key, would you guide me? I'm running android studio on Ubuntu.

[Apurva]

I have generated the key hash but don't know where to put that key, would you guide me? I'm running android studio on Ubuntu.

[Apurva]

I have generated the key hash but don't know where to put that key, would you guide me? I'm running android studio on Ubuntu.

[Apurva]

I have generated the key hash but don't know where to put that key, would you guide me? I'm running android studio on Ubuntu.

[Apurva]

I have generated the key hash but don't know where to put that key, would you guide me? I'm running android studio on Ubuntu.

[Jorgesys]

Hi @Apurva here is the document developers.facebook.com/docs/android/… , i have updated my answer.

[Pradyumna Swain]

Go to facebook Developer site and follow what i wrote

[Pankaj kumar]

first let me know for what purpose you have generated key hash?

[Apurva]

I want to provide Login using Facebook support in my app and now I have figured out that I need to put that key to facebook developers site. :)

[Pankaj kumar]

okk, go to developers.facebook.com and register app first then generate keyhash using above code and then paste keyhash

[Ramiz Ansari]

use password "android" (without quotes) for debug hash.