Key hash for Android-Facebook app

Question

I m working on an Android app  in which I want to integrate a Facebook posting feature  I downloaded the Facebook-Android SDK  and I got the readme md  text file  in there  in which it is mentioned to generate the key hash for Android  How do I generate it

User · Answer

You can get key hash from SHA-1 key  Its very simple you need to get your SHA-1 Signed APK  key from Play Store check below image   Now Copy that SHA-1 key and past it in this website http   tomeko net also check below image to get your Key Hash

User · Answer

To get the Android key hash code  follow these steps    Download OpenSSL for Windows here Now unzip to the C drive Open a CMD prompt Type cd C  Program Files Java jdk1 6 0 26 bin Then type only keytool -export -alias myAlias -keystore C  Users your user name  android myKeyStore   C  openssl-0 9 8k WIN32 bin openssl sha1 -binary   C  openssl-0 9 8k WIN32 bin openssl enc -a -e  Done

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Simply Open you Main Activity File and create below mention function        try       PackageInfo info   getPackageManager   getPackageInfo               your application package name               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  PackageManager NameNotFoundException e       catch  NoSuchAlgorithmException e          1 1 Run you Application  this will generate a Hash key for your application    Now  Open log cat and search with  KeyHash  and copy the hash key  One you generate the Hash key you can remove this function

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Kotlin code to get Hash key   private fun logHashKey         try           val info   getPackageManager   getPackageInfo  your package name   PackageManager GET SIGNING CERTIFICATES           for  signature in info signingInfo signingCertificateHistory                 val md   MessageDigest getInstance  SHA                md update signature toByteArray                 val something   Base64 getEncoder   encodeToString md digest                 Log e  hash key   something                   catch  e1  PackageManager NameNotFoundException            Log e  name not found   e1 toString           catch  e  NoSuchAlgorithmException            Log e  no such an algorithm   e toString           catch  e  Exception            Log e  exception   e toString               Please don t forgot to generate keys in Debug and Release environment as they change as per build setting

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1  Create a key to sign your application  and remember the alias  2  Install OpenSSL  3  Put the bin folder of OpenSSL in your path  4  Follow the steps mentioned under  Setup Single Sign-On  on the FB-Android-SDK page  and generate your Hash Key  Make sure you put the correct alias and keystore file name  5  Create an application on Facebok  and under Mobile Devices tab  enter this Hash Key

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Add this code to onCreate of your activity  it will print the hash under the KeyHash tag in your logCat  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       catch  NoSuchAlgorithmException e         You can add multiple hashkeys for your account  so if you been running in debug don t forget to run this again in release mode

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The instructions currently in Facebook s Android Tutorial  do not work well under Windows  Their example shows how to pipe the keytool output to openssl but if you try this under Windows the output is not valid for some reason  I found that I had to use intermediary files to get it to work properly  Here are the steps that worked for me   Start by downloading openssl for Windows from Google   C  Users Me gt keytool -exportcert -alias my key -keystore my keystore -storepass PASSWORD  gt  mycert bin  C  Users Me gt openssl sha1 -binary mycert bin  gt  sha1 bin  C  Users Me gt openssl base64 -in sha1 bin -out base64 txt   After running these commands the valid hash is stored in the file base64 txt  Copy and paste this to your app settings on Facebook

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Official Documentation on facebook developer site     Override public void onCreate Bundle savedInstanceState        super onCreate savedInstanceState           Add code to print out the key hash     try           PackageInfo info   getPackageManager   getPackageInfo                   com facebook samples hellofacebook                    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           catch  NoSuchAlgorithmException e

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Use this for print key hash in kotlin  try           val info   context getPackageManager   getPackageInfo context packageName                  PackageManager GET SIGNATURES           for  signature in info signatures                val md   MessageDigest getInstance  SHA               md update signature toByteArray                Log d  Key hash    android util Base64 encodeToString md digest    android util Base64 DEFAULT                  catch  e Exception

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download openSSL for windows in here you can find 64bit and 32bit here extract the downloaded file create folder name openSSL in C drive copy all the extracted items in to openSSL folder  bin include lib openssl cnf  get android debug keystore  default location will be       C  Users username  android debug keystore    now get your command prompt and paste this code       keytool -exportcert -alias androiddebugkey -keystore C  Users username android debug keystore    C  openSSL bin openssl  sha1 -binary    C  openSSL bin openssl  base64    hit enter and you will get the 28 digit keycode

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In Android Studio just click on right sidebar panel  quot Gradle quot  to show gardel panel then  -YOURAPPNAME --Task ---Android ---- double click  signingReport  to start Gradle Daemon  then you will see result  Config  debug Store  C  Users username  android debug keystore Alias  AndroidDebugKey MD5  C8 46 01 EA 36 02 D1 21 1B 23 19 91 D4 32 CB AC SHA1  38 AB 4C 01 01 D7 62 E0 61 D1 9F 52 04 0C E5 07 4E E4 9B 39 SHA-256  1B 8C DC 35 48 10 01 2C 1F BD 01 64 F1 01 06 01 60 01 A6 8B 10 15 2E BF 7B C4 FD 38 4C C1 74 01 Valid until  Saturday  February 12  2050  copy SHA1  38 AB 4C 01 01 D7 62 E0 68 D1 9F 52 04 0C E5 07 4E E4 9B 39  go to this PAGE Paste SHA1 and generate your Facebook key hash code

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Download openSSL -  Install it -  it would usually install in C  OpenSSL  then open cmd and type  cd      Program Files  Enter   java  Enter   dir  Enter   cd jdk1 6 0 17  varies with jdk versions   Enter    to check jdk version go to C  program files java jdk version  cd bin  enter   keytool -exportcert -alias androiddebugkey -keystore C Users Shalini  android debug keystore    C  OpenSSL bin openssl sha1 -binary    C  OpenSSL bin openssl base64  Enter    It will ask you for password which is android

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I just made a tool for that exact purpose i e   https   keyhash vaibhavpandey com   It is simpler than anything else as it requires you browse the keystore on your computer and enter the passphrase to generate both SHA-1 Hex and Base64 versions for Google  amp  Facebook respectively  Don t worry about the keystore or passphrase as the job is done completely in-browser  you can inspect the network tab and the tool is open-source too at https   github com vaibhavpandeyvpz keyhash

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As answered on a similar issue i found this to be working for me    Copy the apkname apk file you want to know the hash of to the  Java jdk1 7 0 79 bin  folder Run this command keytool -list -printcert -jarfile apkname apk Copy the SHA1 value and convert it using this site Use the converted Keyhash value  ex  zaHqo1xcaPv6CmvlWnJk3SaNRIQ

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Here are the steps-   Download openssl from Google code  If you have a 64 bit machine you must download openssl-0 9 8e X64 not the latest version  Extract it  create a folder- OpenSSL in C   and copy the extracted code here  detect debug keystore file path  If u didn t find  then do a search in C   and use the Path in the command in next step  detect your keytool exe path and go to that dir  in command prompt and run this command in 1 line-       keytool -exportcert -alias androiddebugkey -keystore  C  Documents and Settings Administrator android debug keystore     C  OpenSSL bin openssl  sha1 -binary      C  OpenSSL bin openssl  base64    it will ask for password  put android that s all  u will get a key-hash    For more info visit here

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I ve created a small tool for Windows and Mac nbsp OS nbsp X  Just throw in the key-store file  and get the hash key   If you want the default debug keystore file  use the default alias and password  Else  use your own keystore file and values   Check it out  download the Windows version or download the Mac OS X version  Dev-Host might be down sometimes    so if the link is broken  PM me and I ll fix it    I hope that help you guys     Dec 31  2014 - EDIT  Changed host to AFH  Please let me know if the links are broken  Nov 21  2013 - EDIT   As users requested  I added a default keystore location and a DONATE button  Feel free to use it if I ve helped you

User · Answer

There are two methods available complex one and the easy one  Methods One   little Complex   first of all you have to download ssl 64bit or 32bit accordingly  remember to download the file with name containing e after version code openssl-0 9 8e X64 zip OR openssl-0 9 8e WIN32 zip not with the k after the version code   and place in AndroidStudio jre bin directory  if you dont know where to place  you can find this directory by right clicking on the android studio shortcut as     now you have managed two required things in one place  but still you have to find the path for your debug keystore  that is always can be found in the  C  Users yourusernamehere  android debug keystore        NOTE  If your app is published already  or about to publish then use your publishing signing keystore  if and only if your are testing   in development mode than you can use debug keysotre   As everything is setup  let arrange the command you wanted to execute for the hash key generation in base64 format  and you command will look like this  keytool exe -exportcert -alias androiddebugkey -keystore  C  Users ayyaz talat  android debug keystore     D  Program Files Android Android Studio jre bin openssl bin openssl exe  sha1 -binary   D  Program Files Android Android Studio jre bin openssl bin openssl exe  base64   it will promt you to enter a password for the debug keystore  which is android by default  if you are using your own key than the password will be also yours  the output will look like this if everything goes well as expected  hope it may help    Second Method  Respectively easy one   if you dont want to go throught all the above procedure  then just use the following method to log the haskey    private void printKeyHash             try               PackageInfo info   getPackageManager   getPackageInfo getPackageName    PackageManager GET SIGNATURES               for  Signature signature   info signatures                    MessageDigest md   MessageDigest getInstance  SHA1                    md update signature toByteArray                     Log d  KeyHash    Base64 encodeToString md digest    Base64 DEFAULT                            catch  PackageManager NameNotFoundException e                Log e  KeyHash    e toString               catch  NoSuchAlgorithmException e                Log e  KeyHash    e toString                       output

User · Answer

You need to create a keystore by the keytool for signed apps for android like the procedure described in Android Site and then you have to install cygwin and then you need to install openssl from google code then just execute the following command and you will get the hash key for android and then put that hash key into the facebook application you created  And then you can access the facebook application through the Android Application for posting wall   publish stream   could be an example     keytool -exportcert -alias alias name -keystore sample keystore keystore   openssl sha1 -binary   openssl base64  You need to execute the above command from cygwin

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For an Android application  This code is used to get the hash key in your Android application for Facebook integration  I have tested all devices and it s working  Only change the package name of this code   private void facebookHashKey          try           PackageInfo info   getPackageManager   getPackageInfo  com app helpcove   PackageManager GET SIGNATURES           for  Signature signature   info signatures                MessageDigest md   MessageDigest getInstance  SHA                md update signature toByteArray                 String hashCode    Base64 encodeToString md digest    Base64 DEFAULT               System out println  Print the hashKey for Facebook    hashCode               Log d  KeyHash    Base64 encodeToString md digest    Base64 DEFAULT                    catch  NameNotFoundException e           catch  NoSuchAlgorithmException e

User · Answer

try this     two way to get Hash Key Value   1  get hash key from using command line  Official Doc   https   developers facebook com docs android getting-started   keytool -exportcert -alias androiddebugkey -keystore  HOMEPATH   android debug keystore   openssl sha1 -binary   openssl base64   OR           2  get hash key using code       Override    protected void onCreate Bundle savedInstanceState               super onCreate savedInstanceState              setContentView R layout activity main                  Hask Kay generation               GetKeyHase               private void GetKeyHase                 try                   PackageInfo info   getPackageManager   getPackageInfo  ADD YOUR PACKAGE NAME   PackageManager GET SIGNATURES                   for  Signature signature   info signatures                        MessageDigest md    MessageDigest getInstance  SHA                         md update signature toByteArray                         String hashkey value   new String Base64 encode md digest    0                        Log e  hash key   hashkey value                         check you logcat hash key value                                catch  Exception e                    Log e  exception   e toString

User · Answer

This is what is given at the official page of Facebook      keytool -exportcert -alias androiddebugkey -keystore    android debug keystore   openssl sha1 -binary   openssl base64   Let me break this command into fragments    Look for  keytool exe   You can search that on the C  drive  You can find it in  java jdk  or  java jre   If you have installed multiple versions  choose any  Open a CMD prompt and go to the above directory where you found  keytool exe    Clip the  exe   and paste the above command provided on the Facebook page  You will get an error on entering this that OpenSSL is not recognized as in input output command  Solution   Download  Openssl  from OpenSSL  if you have a 64-bit machine you must download openssl-0 9 8e X64   Extract and save it anywhere    I saved it on the C  drive in the OpenSSl folder Replace the openssl in the above command in which you was getting an error of OpenSSL with  C  OpenSSL bin openssl  at both the places after the pipe       If prompted for a password  enter android    And you will get your hash key  For further steps  refer again to the Facebook page

User · Answer

Solved mine too in Android Studio but with slight different approach   To get the SHA-1 value in Android Studio    Click Gradle Click Signing Report Copy SHA-1      SHA-1 value look like this CD A1 EA A3 5C 5C 68 FB FA 0A 6B E5 5A 72 64 DD 26 8D 44 84  and open http   tomeko net online tools hex to base64 php to convert your SHA1 value to base64  This is what Facebook requires get the generated hash                           and copy the key hash to the facebook app console    Part of this answer taken from here Github Link

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The simplest solution    Don t add the hash key  implement everything else When facebook login is pressed  you will get an error saying  Invalid key hash  The key hash  xxx  does not match any stored key       Open the facebook app dashboard and add the hash  xxx     xxx  hash from the error       sign

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To generate a hash of your release key  run the following command on Mac or Windows substituting your release key alias and the path to your keystore    On Windows  use   keytool -exportcert -alias  lt RELEASE KEY ALIAS gt  -keystore  lt RELEASE KEY PATH gt    openssl sha1 -binary   openssl base64   This command should generate a 28 characher string  Remember that COPY and PASTE this Release Key Hash into your Facebook App ID s Android settings   image  fbcdn-dragon-a akamaihd net hphotos-ak-xpa1 t39 2178-6 851568 627654437290708 1803108402 n png  Refer from   https   developers facebook com docs android getting-started release-key-hash and http   note taable com

User · Answer

The simplest solution I have found is this    Open up Log Cat  Try and access Facebook with the Android SDK  Look for the line in the log that looks like this   04-24 01 14 08 605  I System out 31395   invalid key Android key mismatch   Your key  abcdefgHIJKLMN OPqrstuvwzyz  does not match the allowed keys specified in your application settings  Check your application settings at  http   www facebook com developers  Copy  abcdefgHIJKLMN OPqrstuvwzyz  and paste it into the Facebook Android Key Hash area

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I did a small mistake that should be kept in mind  If you are using your keystore then give your alias name  not androiddebugkey     I solved my problem  Now if Facebook is there installed in my device  then still my app is getting data on the Facebook login integration  Just only care about your hash key   Please see below   C  Program Files Java jdk1 6 0 45 bin gt keytool -exportcert -alias here your alias name  -keystore  G  yourkeystorename keystore    G  ssl bin openssl  sha1 -binary    G  ssl bin openssl  base64   Then press Enter - it will ask you for the password and then enter your keystore password  not Android   Cool

User · Answer

For Linux  Open Terminal     For Debug Build  keytool -exportcert -alias androiddebugkey -keystore debug keystore   openssl sha1 -binary   openssl base64   you wil find debug keystore from   android  folder copy it from and paste on desktop and run above command  For release Build  keytool -exportcert -alias  lt aliasName gt  -keystore  lt keystoreFilePath gt    openssl sha1 -binary   openssl base64   NOTE   Make sure In Both case it must ask for password  If it does not asks for password that means something is wrong in command

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The best approach is to use the following code   private void getHashKey String pkgName        try               PackageInfo info   getPackageManager   getPackageInfo pkgName  PackageManager GET SIGNATURES           for  Signature signature   info signatures                        MessageDigest md   MessageDigest getInstance  SHA                md update signature toByteArray                 String hashKey   Base64 encodeBytes md digest                  hashKey et setText hashKey               Log i  KeyTool   pkgName     - gt  hashKey       hashKey                       catch  NameNotFoundException e                e printStackTrace              catch  NoSuchAlgorithmException e                e printStackTrace              But I was so frustrating with the fact that there is no simple tool to generate the HashKey for the Facebook app  Each time I had to play with Openssl and Keytool or to use a code to get the hash from signature      So I wrote a simple KeyGenTool that will do that work for you  -  KeyGenTool on Google Play  lt -  Enjoy

User · Answer

I have done by this way for Linux OS  amp  Windows OS   Linux    Download Openssl Open terminal keytool -exportcert -alias   myaliasname   -keystore    home comp-1 Desktop mykeystore jks     openssl sha1 -binary   openssl base64   Kindly change Alias Name and Keystore with it s path as your requirement   Terminal would ask for Password of Keystore  You have to provide password for the same Keystore   So finally you would get the Release Hashkey   Windows   Steps for Release Hashkey    Download Openssl  Download from here   I have downloaded for 64 bit OS  you can find more here Extract downloaded zip file to C   drive only Open command prompt keytool -exportcert -alias   myaliasname   -keystore    C  Users hiren patel Desktop mykeystore jks       C  openssl-0 9 8e X64 bin openssl exe  sha1 -binary    C  openssl-0 9 8e X64 bin openssl exe  base64   Kindly change Alias Name and Keystore with it s path as your requirement    Note  Please put your details where I have marked between         Terminal would ask for Password of Keystore  You have to provide password for the same Keystore   So finally you would get the Release Hashkey   Done

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EDIT 2020 -  Now I totally recommend the answer here  way easier using android studio  faster and no need to wright any code - the one below was back in the eclipse days    -   You can use this code in any activity  It will log the hashkey in the logcat  which is the debug key  This is easy  and it s a relief than using SSL   PackageInfo info  try       info   getPackageManager   getPackageInfo  com you name   PackageManager GET SIGNATURES       for  Signature signature   info signatures            MessageDigest md          md   MessageDigest getInstance  SHA            md update signature toByteArray             String something   new String Base64 encode md digest    0              String something   new String Base64 encodeBytes md digest              Log e  hash key   something           catch  NameNotFoundException e1        Log e  name not found   e1 toString       catch  NoSuchAlgorithmException e        Log e  no such an algorithm   e toString       catch  Exception e        Log e  exception   e toString         You can delete the code after knowing the key

User · Answer

keytool -exportcert -alias androiddebugkey -keystore       C  Users pravin  android debug keystore    H  OpenSSL bin openssl  sha1 -binary    H  OpenSSL bin openssl  base64   This worked for me      Steps   1  Open command line go to -  gt  java Keytool      for me C  Program Files Java JDK1 7 bin 2  Download OpenSSL from google 3  paste this with changing your paths -    keytool -exportcert -alias androiddebugkey -keystore C  Users pravin  android debug keystore    H  OpenSSL bin openssl  sha1 -binary    H  OpenSSL bin openssl  base64                              give proper debug keystore path and openSSL path      4  Finley it may be ask u password    so give password - gt  android       5  you will get 28 characters that will be your has key

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import java security MessageDigest  import java security NoSuchAlgorithmException   import android os Bundle  import android app Activity  import android content pm PackageInfo  import android content pm PackageManager  import android content pm PackageManager NameNotFoundException  import android content pm Signature  import android text Editable  import android util Base64  import android util Log  import android view Menu  import android view View  import android view View OnClickListener  import android widget Button  import android widget EditText   public class MainActivity extends Activity        Button btn      EditText et      PackageInfo info       Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity main           btn  Button findViewById R id button1           et  EditText findViewById R id editText1           btn setOnClickListener new OnClickListener                   Override             public void onClick View v                       TODO Auto-generated method stub                  try                       info   getPackageManager   getPackageInfo  com example id   PackageManager GET SIGNATURES                       for  Signature signature   info signatures                            MessageDigest md                          md   MessageDigest getInstance  SHA                            md update signature toByteArray                             String something   new String Base64 encode md digest    0                              String something   new String Base64 encodeBytes md digest                              et setText      something                           Log e  hash key   something                                           catch  NameNotFoundException e1                        Log e  name not found   e1 toString                       catch  NoSuchAlgorithmException e                        Log e  no such an algorithm   e toString                       catch  Exception e                        Log e  exception   e toString

[android] Key hash for Android-Facebook app

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