How to create Android Facebook Key Hash

Question

I do not understand this process at all  I have been able to navigate to the folder containing the keytool in the Java SDK  Although I keep getting the error openssl not recognised as an internal or external command  The problem is even if I can get this to work  what would I do and with what afterwards

User · Answer

You can simply use one line javascript in browser console to convert a hex map key to base64. Open console in latest browser (F12 on Windows, ? Option+? Command+I on macOS, Ctrl+? Shift+I on Linux) and paste the code and replace the SHA-1, SHA-256 hex map that Google Play provides under Release Setup App signing:

Hex map key to Base64 key hash

> btoa('a7:77:d9:20:c8:01:dd:fa:2c:3b:db:b2:ef:c5:5a:1d:ae:f7:28:6f'.split(':').map(hc => String.fromCharCode(parseInt(hc, 16))).join(''))
< "p3fZIMgB3fosO9uy78VaHa73KG8="

You can also convert it here; run the below code snippet and paste hex map key and hit convert button:

_x000D_

document.getElementById('convert').addEventListener('click', function() {
  document.getElementById('result').textContent = btoa(
    document.getElementById('hex-map').value
      .split(':')
      .map(hc => String.fromCharCode(parseInt(hc, 16)))
      .join('')
  );
});

_x000D_

<textarea id="hex-map" placeholder="paste hex key map here" style="width: 100%"></textarea>
<button id="convert">Convert</button>
<p><code id="result"></code></p>

_x000D_

And if you want to reverse a key hash to check and validate it:

Reverse Base64 key hash to hex map key

> atob('p3fZIMgB3fosO9uy78VaHa73KG8=').split('').map(c => c.charCodeAt(0).toString(16)).join(':')
< "a7:77:d9:20:c8:1:dd:fa:2c:3b:db:b2:ef:c5:5a:1d:ae:f7:28:6f"

_x000D_

document.getElementById('convert').addEventListener('click', function() {
  document.getElementById('result').textContent = atob(document.getElementById('base64-hash').value)
    .split('')
    .map(c => c.charCodeAt(0).toString(16))
    .join(':')
});

_x000D_

<textarea id="base64-hash" placeholder="paste base64 key hash here" style="width: 100%"></textarea>
<button id="convert">Convert</button>
<p><code id="result"></code></p>

_x000D_

User · Answer

If you have already uploaded the app to Play store you can generate Hash Key as follows   Go to Release Management here  Select Release Management - gt  App Signing  You can see SHA1 key in hex format App signing certificate   Copy the SHA1 in hex format and convert it in to base64 format  you can use this link do that without the SHA1  part of the hex   Go to Facebook developer console and add the key after convert to base 64  in the settings     gt  basic     gt  key hashes

User · Answer

Just run this code in your OnCreateView Or OnStart Actvity and This Function Return you Development Key Hash   private String generateKeyHash         try           PackageInfo info   getPackageManager   getPackageInfo getPackageName    PackageManager GET SIGNATURES           for  Signature signature   info signatures                MessageDigest md    MessageDigest getInstance  SHA                 md update signature toByteArray                 return new String Base64 encode md digest    0                   catch  Exception e            Log e  exception   e toString               return  key hash not found

User · Answer

Please try this   public static void printHashKey Context pContext            try               PackageInfo info   pContext getPackageManager   getPackageInfo pContext getPackageName    PackageManager GET SIGNATURES               for  Signature signature   info signatures                    MessageDigest md   MessageDigest getInstance  SHA                    md update signature toByteArray                     String hashKey   new String Base64 encode md digest    0                    Log i TAG   printHashKey   Hash Key      hashKey                           catch  NoSuchAlgorithmException e                Log e TAG   printHashKey     e             catch  Exception e                Log e TAG   printHashKey     e

User · Answer

to generate your key hash on your local computer  run Java s keytool utility  which should be on your console s path  against the Android debug keystore  This is  by default  in your home  android directory   On OS X  run   keytool -exportcert -alias androiddebugkey -keystore    android debug keystore   openssl sha1 -binary   openssl base64   On Windows  use -  keytool -exportcert -alias androiddebugkey -keystore  HOMEPATH   android debug keystore   openssl sha1 -binary   openssl base64   hope this will help you  Ref - developer facebook site

User · Answer

https   developers facebook com docs android getting-started   4 19 0 - January 25  2017  Facebook SDK  Modified  Facebook SDK is now auto initialized when the application starts  In most cases a manual call to FacebookSDK sdkInitialize   is no longer needed  See upgrade guide for more details   For Debug  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  NoSuchAlgorithmException e        e printStackTrace      catch  Exception e        e printStackTrace

User · Answer

this will help newbees also  just adding more details to  coder For Life22 s answer  if this answer helps you don t forget to upvote  it motivates us  for this you must already know the path of the app s keystore file and password     for this example consider the key is stored at  c  keystorekey new jks  1  open this page https   code google com archive p openssl-for-windows downloads 2  download 32 or 64 bit zip file as per your windows OS  3  extract the downloaded file where ever you want and remember the path  4  for this example we consider that you have extracted the folder in download folder      so the file address will be  C  Users 0 Downloads openssl-0 9 8e X64 bin openssl exe   5  now on keyboard press windows r button  6  this will open run box  7  type cmd and press Ctrl Shift Enter  8  this will open command prompt as administrator  9  here navigate to java s bin folder        if you use jre provided by Android Studio you will find the path as follows        a  open android studio        b  file- project structure       c  in the left pane  click  SDK location        d  in the right pane  below  JDK location  is your jre path        e  add   bin  at the end of this path as the file  keytool exe   we need  is inside this folder        for this example i consider  you have installed java separately and following is the path        C  Program Files Java jre-10 0 2 bin        if you have installed 32bit java it will be in        C  Program Files  x86  Java jre-10 0 2 bin  10  now with above paths execute command as following   keytool -exportcert -alias androiddebugkey -keystore  c  keystorekey new jks     C  Users 0 Downloads openssl-0 9 8e X64 bin openssl exe  sha1 -binary   C  Users 0 Downloads openssl-0 9 8e X64 bin openssl exe  base64    You will be asked for password  give the password you have given when creating keystore key         this will give you the key   errors  if you get  ---   keytool  is not recognized as an internal or external command --- this means that java is installed somewhere else

User · Answer

Here is what you need to do -  Download openSSl from Code 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

User · Answer

Run either this in your app    FacebookSdk sdkInitialize getApplicationContext     Log d  AppLog    key     FacebookSdk getApplicationSignature this          Or this   public static void printHashKey Context context        try           final PackageInfo info   context getPackageManager   getPackageInfo context getPackageName    PackageManager GET SIGNATURES           for  android content pm Signature signature   info signatures                final MessageDigest md   MessageDigest getInstance  SHA                md update signature toByteArray                 final String hashKey   new String Base64 encode md digest    0                Log i  AppLog    key     hashKey                         catch  Exception e            Log e  AppLog    error    e             And then look at the logs   The result should end with        Solution is based on here and here

User · Answer

You can get all your fingerprints from https   console developers google com projectselector apis credentials And use this Kotlin code to convert it to keyhash   fun main args  Array lt String gt         listOf   lt your production sha1 fingerprint gt                  lt your debug1 sha1 fingerprint gt                  lt your debug2 sha1 fingerprint gt                 map   it split                     map   it map   it toInt 16  toByte     toByteArray                  map   String Base64 getEncoder   encode it                  forEach   println it

User · Answer

That s how I obtained my    private class SessionStatusCallback implements Session StatusCallback            Override         public void call Session session  SessionState state  Exception exception                 if  exception    null                    new AlertDialog Builder FriendActivity this                           setTitle R string login failed dialog title                           setMessage exception getMessage                             setPositiveButton R string ok button  null                           show                    So when you re trying to enter without the key  an exception will occur  Facebook put the RIGHT key into this exception  All you need to do is to copy it

User · Answer

Download open ssl   Then add openssl bin to the path system variables   My computer -  properties -  Advanced configurations -  Advanced -  System variables -  under system variables find path  and  add this to its endings   yourFullOpenSSLDir bin  Now open a command line on your jdk bin folder C  Program Files Java jdk1 8 0 40 bin  on windows hold shift and right click -  open command line here  and use   keytool -exportcert -alias keystorealias -keystore C  yourkeystore folder keystore jks   openssl sha1 -binary   openssl base64   And copy the 28 lenght number it generates after giving the password

User · Answer

OpenSSL  You have to install that if it doesn t come preinstalled with your operating system  e g  Windows does not have it preinstalled   How to install that depends on your OS  for Windows check the link provided by coder For Life22     The easiest way without fiddling around is copying that openssl exe binary to your keytool path if you are on Windows  If you don t want to do that  you have to add it to your PATH environment variable  Then execute the command provided in the docs   keytool -exportcert -alias androiddebugkey -keystore    android debug keystore   openssl sha1 -binary   openssl base64   Note that the argument after -keystore points to your debug keystore  This location also depends on your operating system  Should be in one of the following locations    Windows Vista or 7 -  C  Users  android debug keystore Windows XP -  C  Documents and Settings  android debug keystore OS X and Linux -    android debug keystore   If you did everything right  you should be prompted for a password  That is android for the debug certificate  If the password is correct the console prints a hash  somewhat random chars and numbers     Take that and copy it into the android key hash field inside the preferences of your app on facebook  To get there  go to developers facebook com apps  select your app  go to Edit settings and scroll down  After that  wait a few minutes until the changes take effect

User · Answer

For Windows    open command prompt and paste below command      keytool -exportcert -alias androiddebugkey -keystore    HOMEPATH  android debug keystore   openssl sha1 -binary   openssl   base64    Enter password   android --  Hit Enter Copy Generated Hash Key --  Login Facebook with your developer account Go to your Facebook App --  Settings--  Paste Hash key in  key hashes  option -- save changes  Now Test your android app with Facebook Log-in Share etc

User · Answer

There is a short solution too  Just run this in your app    FacebookSdk sdkInitialize getApplicationContext     Log d  AppLog    key     FacebookSdk getApplicationSignature this      A longer one that doesn t need FB SDK  based on a solution here     public static void printHashKey Context context        try           final PackageInfo info   context getPackageManager   getPackageInfo context getPackageName    PackageManager GET SIGNATURES           for  android content pm Signature signature   info signatures                final MessageDigest md   MessageDigest getInstance  SHA                md update signature toByteArray                 final String hashKey   new String Base64 encode md digest    0                Log i  AppLog    key     hashKey                         catch  Exception e            Log e  AppLog    error    e             The result should end with

User · Answer

EASY WAY -  Don t install openssl -  USE GIT BASH   keytool -exportcert -alias androiddebugkey -keystore    android debug keystore   openssl sha1 -binary   openssl base64  The default password is  android    Most of us have Git Bash installed so this is my favorite way

User · Answer

You can use this apk   1 first install the app from the Google play store 2 install the above apk 3 launch the apk and input the package name of your app 4 then you will get the hash code you want

User · Answer

For easy vedio tutorial link for the generate KeyHash Here  Download openssl from HERE

User · Answer

private fun generateKeyHash    String   try       val info  packageManager getPackageInfo packageName  PackageManager GET SIGNATURES      for  signature in info signatures            val md  MessageDigest   MessageDigest getInstance  quot SHA quot           md update signature toByteArray            return String Base64 encode md digest    0           catch  e  Exception        Log e  quot exception quot   e toString          return  quot key hash not found quot

User · Answer

For Linux and Mac  Open Terminal     For Debug Build  keytool -exportcert -alias androiddebugkey -keystore debug keystore   openssl sha1 -binary   openssl base64   You will find debug keystore in the   android  folder  Copy it and paste onto the desktop and run the above command   For release Build  keytool -exportcert -alias  lt aliasName gt  -keystore  lt keystoreFilePath gt    openssl sha1 -binary   openssl base64   NOTE   Make sure that in both cases it asks for a password  If it does not ask for a password  it means that something is wrong in the command  Password for debug keystore is  android  and for release you have to enter password that you set during create keystore

User · Answer

I ran into the same problem and here s how I was able to fix it keytool -list -alias androiddebugkey -keystore  lt project file android app debug keystore gt

User · Answer

Since API 26  you can generate your HASH KEYS using the following code in KOTLIN without any need of Facebook SDK   fun generateSSHKey context  Context       try           val info   context packageManager getPackageInfo context packageName  PackageManager GET SIGNATURES          for  signature in info signatures                val md   MessageDigest getInstance  SHA               md update signature toByteArray                val hashKey   String Base64 getEncoder   encode md digest                 Log i  AppLog    key  hashKey                    catch  e  Exception            Log e  AppLog    error    e

User · Answer

step 1- gt open cmd in your system step 2- gt C  Program Files Java jdk1 6 0 43 bin gt  Step 3- gt keytool -list -v -keystore C  Users leon  android debug keystore -alias androiddebugkey -storepass android -keypass android u got SHA1 value click this link u convert ur SHA1 value to HASH KEY im 100  sure this link will help u

User · Answer

Try this answer  https   stackoverflow com a 54513168 9236994  with minimal efforts helps to resolve the issue

User · Answer

Here is complete details  For Windows   1  Download OpenSSl either 3rd or 4th  with e will work better  based on your system 32bit  or 64bit    2  Extract the downloaded zip inside C directory   3  Open the extracted folder up to bin and copy the path  it should be some thing like C  openssl-0 9 8k X64 bin openssl    add  openssl at end   4   Get the path to the bin folder of Jdk  if you know how ignore this        Open android studio  file Project Structure ctrl alt shift s    select SDK location in left side panel  copy the JDK location and add  bin to it   So final JDK Location will be like C  Program Files Android Android Studio jre bin  we are following this method to get Jdk location because you might use embedded jdk like me    now you have OpenSSl location  amp  JDK location   5  now we need debug keystore location   for that open C  Users  YourUserName   android  there should be a file name debug keystore  now copy the path location  it should be some thing like   C  Users Redman  android debug keystore  6  now open command prompt and type command  cd YourJDKLocationFromStep4     in my case    cd  C  Program Files Android Android Studio jre bin    7  now construct the following command  keytool -exportcert -alias androiddebugkey -keystore YOURKEYSTORELOCATION   YOUROPENSSLLOCATION sha1 -binary   YOUROPENSSLLOCATION base64   in my case the command will look like   keytool -exportcert -alias androiddebugkey -keystore  C  Users Redman  android debug keystore     C  openssl-0 9 8k X64 bin openssl  sha1 -binary    C  openssl-0 9 8k X64 bin openssl  base64   now enter this command in command prompt   if you did ever thing right you will be asked for password  password is android   Enter keystore password   android   thats it  you will be given the Key Hash   just copy it and use it  For Signed KeyHash construct the following Command  keytool -exportcert -alias YOUR ALIAS FOR JKS -keystore YOUR JKS LOCATION   YOUROPENSSLLOCATION sha1 -binary   YOUROPENSSLLOCATION base64   enter your keystore password   If you enter wrong password it will give wrong KeyHash   NOTE   If for some reason if it gives error at some path then wrap that path in double quotes  Also Windows power shell was not working well for me  I used git bash  or use command prompt     example  keytool -exportcert -alias androiddebugkey -keystore  C  Users Redman  android debug keystore     C  openssl-0 9 8k X64 bin openssl  sha1 -binary    C  openssl-0 9 8k X64 bin openssl  base64

User · Answer

I was having the same exact problem  I wasnt being asked for a password  and it seems that I had the wrong path for the keystore file   In fact  if the keytool doesn t find the keystore you have set  it will create one and give you the wrong key since it isn t using the correct one   The general rule is that if you aren t being asked for a password then you have the wrong key being generated

User · Answer

so easy find sha1 of your android project and paste on this website fbkeyhash for get sha1 just    vscode and my cmd project-name cd android  amp  amp    gradlew signingReport     other  project-name cd android  amp  amp    gradlew signingReport

User · Answer

Easy way  By using this website you can get Hash Key by Converting SHA1 key to Hash Key for Facebook

User · Answer

keytool -exportcert -alias androiddebugkey -keystore  C  Users  Deepak   android debug keystore     C  Users Deepak ssl bin openssl  sha1 -binary    C  Users Deepak ssl bin openssl  base64  2 Changes in this above command 1 Deepak   Replace by your System USERNAME 2 C  Users Deepak ssl    replce your Open SSL path   run this command and get output like this  C  Users Deepak keytool -exportcert -alias androiddebugkey -keystore  C  Users D eepak android debug keystore     C  Users Deepak ssl bin openssl  sha1 -binary    C  Users Deepak ssl bin openssl  base64 Enter keystore password          ga0RGNY

User · Answer

if someone have problem with openssl   follow this instructions    download  openssl  for windows in zip extract zip in the path you want  get path for  bin  folder inside the zip   That s it  https   sourceforge net projects openssl files latest download

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