Android Facebook integration with invalid key hash

Question

In one of my apps I need to get data from Facebook    I am doing this   I have created app ID  It logs in successfully  but after logging out  I log in  and then it gives me     What is wrong I am doing  I am using the Facebook SDK    I have installed Facebook on my phone    It is running well within an emulator  but that does not have the inbuilt Facebook application installed   This is my code   if  FB APP ID    null        Builder alertBuilder   new Builder this       alertBuilder setTitle  Warning        alertBuilder setMessage  A Facebook Applicaton ID must be                                  specified before running this example  see App java        alertBuilder create   show          Initialize the dispatcher Dispatcher dispatcher   new Dispatcher this   dispatcher addHandler  login   LoginHandler class   dispatcher addHandler  stream   StreamHandler class   dispatcher addHandler  logout   LogoutHandler class       If a session already exists  render the stream page    immediately  Otherwise  render the login page  Session session   Session restore this   if  session    null        dispatcher runHandler  stream      else       dispatcher runHandler  login

User · Answer

Paste the following code into your OnCreate method:

try {
    PackageInfo info = getPackageManager().getPackageInfo(
                           "com.example.packagename",
                           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) {
    e.printStackTrace();
}
catch (NoSuchAlgorithmException e) {
    e.printStackTrace();
}

Just modify the package name. Then go to your LogCat file and select Debug search here. Then you will find the hash key. Now copy this hash key and then go to the developer.facebook.app_id site, edit your hash key, and press Save. Now run your Android project again. I think issue will be resolved.

User · Answer

I experienced the same problem  I made a short research on the possible reasons for this strange behavior and I found the following    During the first execution of a new Facebook app  it will allow connection login even if you don t specify any key hashes  For me  the tutorial which Facebook provided didn t generate the correct key hash  because it was giving the wrong configuration  When executing   keytool -exportcert -alias androiddebugkey -keystore  HOMEPATH   android debug keystore   openssl sha1 -binary   openssl base64    make sure you check all properties - the HOMEPATH  the existence of the keystore  etc  Maybe you also have to provide password    What generated the proper configuration was the solution suggested by  Mahendran  Also  if you see the error originally posted  http   i stack imgur com 58q3v png   most probably the key hash you see on the screen is your real one  If nothing else works  try inputting it in Facebook    I got all those results with  Windows 7 64-bit edition  Android Studio 1 2 2  JDK 7

User · Answer

The generated hash key is wrong  You may get the hash key using two steps   One is through a command prompt  Another one is through coding  The hash key through a command prompt is working on the first time only  I don t know the reason  I have also got the same problem  So I tried it through programmatically   Follow these steps   Paste the following code in oncreate     try       PackageInfo info   getPackageManager   getPackageInfo                              com example packagename                              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        Modify  com example packagename  with your package name in the above coding without fail  you may find your package name in the Android manifest file    Run your application  Go to the activity where you pasted the above code  In the LogCat file  search for  KeyHash   You may find a key hash  Copy the key hash and go to Facebook application dashboard page  Go to settings and enter the details like in the below image     Once you finished the above step  relaunch the app again  You may now log into Facebook  For more details about key hash  check the link   If you add wrong information in the settings page  it means it will give some error  So use the correct information there  And also if the public  other than you  need to use your application means you need to enable the permission  change  yes  in the  Status  amp  Review  next to the setting

User · Answer

The following code will give you your hash for Facebook  but you have to follow these steps in order to get the release candidate hash    Copy and paste this code in your main activity  try       PackageInfo info   getPackageManager   getPackageInfo                              com example packagename                              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       Generate a signed APK file  Connect your phone to a laptop and make sure it stays connected  Install and run the APK file in your phone by manually moving the release APK to your phone  Now look at Android LogCat  use filter KeyHash     You should see your release hash key for Facebook  Simply copy and paste it in your https   developers facebook com apps  It s under settings  Now you can test the app it should work perfectly well

User · Answer

After a long research  we found a solution   We had set permissions as   loginButton setReadPermissions public profile email     This worked for the first time  but when we re-logged in to Facebook  it gave the Invalid Hash Error   The simple solution was to change the above line to   loginButton setReadPermissions Arrays asList  public profile    email       And it worked like a bliss   Facebook should return the correct exception instead of the misleading invalid hash key error

User · Answer

I tried all of the previous answers and nothing helped my case with my clients   Then my client remembered he had the Facebook App installed on his device  After he removed it  the login worked perfectly   The hashkey had been changed  and I ve replaced the old hash keys at Facebook Developers Console with the key from the error  as suggested above   and it works   The Facebook App itself might be the issue  so you better figure this out on a device with the Facebook app installed and on a device with the Facebook app not installed and handle both cases

User · Answer

I had the same problem when I was debugging my app  I ve rewrote the hash that you have crossed out in the attached image  the one that Facebook says is invalid  and added it in the Facebook s developers console to key hashes  Just be careful of typos    This solution is more like an easy workaround than a proper solution

User · Answer

After so many trials I stumbled on a solution to this  I generated and added both debug and release keys to the Facebook developer console and still got the error   The only solution that worked for me was is to uninstall the OpenSSL program from Google and download from Win32 Win64 OpenSSL Installer for Windows  It really works like magic

User · Answer

I fixed this by adding the following into MainApplication onCreate   try       PackageInfo info   getPackageManager   getPackageInfo                              com genolingo genolingo                              PackageManager GET SIGNATURES        for  Signature signature   info signatures            MessageDigest md   MessageDigest getInstance  SHA            md update signature toByteArray             String hash   Base64 encodeToString md digest    Base64 DEFAULT           KeyHash addKeyHash hash           catch  PackageManager NameNotFoundException e        Log e  PackageInfoError     NameNotFoundException      catch  NoSuchAlgorithmException e        Log e  PackageInfoError     NoSuchAlgorithmException        I then uploaded this to the Google developer console and then downloaded the derived APK which  for whatever reason  has a totally different key hash   I then used LogCat to determine the new key hash and added it Facebook as other users have outlined

User · Answer

If you are facing this problem then put this key into your developer facebook com     Then make sure your app is live on developer facebook com   This green circle is indicating the app is live     If it is not then follow these two steps for make your app live   Step 1 Go to your application rarr setting rarr  add Contact Email and apply Save Changes   Step 2 Go to the App Review option and make sure this toggle is Yes  I added a screenshot     Note  If you want to copy the hashkey  check the BlueServiceQueue in LogCat

User · Answer

This may help someone with the same problem    Generate the key hash using the below code  keytool -exportcert -alias  lt your keystore gt  alias -keystore  lt your keystore file gt    openssl sha1 -binary   openssl base64   How to use keytool Paste it in required field in Facebook developer In Android Studio  menu File  rarr  Project Structure    Add signing parameters  Select flavors    Select the signing configuration we created  Select build type   Select build variant and build it

User · Answer

You must create two key hashes  one for Debug and one for Release   For the Debug key hash   On OS X  run   keytool -exportcert -alias androiddebugkey -keystore    android debug keystore   openssl sha1 -binary   openssl base64   On Windows  run   keytool -exportcert -alias androiddebugkey -keystore  HOMEPATH   android debug keystore   openssl sha1 -binary   openssl base64   Debug key hashes source  For the Release key hash   On OS X  run  replace what is between  lt  gt  with your values    keytool -exportcert -alias  lt RELEASE KEY ALIAS gt  -keystore  lt RELEASE KEY PATH gt    openssl sha1 -binary   openssl base64   On Windows  use  replace what is between  lt  gt  with your values     keytool -exportcert -alias  lt RELEASE KEY ALIAS gt  -keystore  lt RELEASE KEY PATH gt    openssl sha1 -binary   openssl base64   Release key hashes source

User · Answer

Even though this question has been answered in alot of helpful ways I just wanted to add that when I followed Rafal Maleks answer  using the hash keys on Google Play Console  I was NOT able to use the App Signing SHA1 key  still got the generic error from Facebook  Instead I needed to use the SHA-1 certificate fingerprint from the Upload Certificate part  just below the App Signing part on Google Play Console   Same process otherwise     Copy the SHA-1 certificate fingerprint from Upload Certificate section in Google Play Console Convert the SHA-1 using  http   tomeko net online tools hex to base64 php and copy the output  base64  Paste it into the Key Hashes input on developer facebook com and save changes    Hopefully this answer isn t to redundant and will help someone that can t get it to work with the App Signing certificate    Now Facebook login works in my app both in debug and release mode

User · Answer

What Facebook used is not the default password and alias for debug  You need to change it following and it will work    usr lib jvm jdk1 8 0 66 bin keytool -exportcert -alias androiddebugkey -keystore    android debug keystore   openssl sha1 -binary   openssl base64   If you have not changed anything with the default password it should be  android    You can also configure it in the build gradle file  But the same alias password should be used for generating the hash   android       signingConfigs           release               storeFile file     android debug keystore               storePassword  android              keyAlias  androiddebugkey              keyPassword  android

User · Answer

Here are a lot of right answers  Just one thing   Paste the received hash into Application  rarr  Settings  rarr  Main  not via the fast start tutorial

User · Answer

I got the same problem  I was sure that it was due to very small fault and yes it was   I found the solution   When generating the debug hash key in my computer  I entered the password of my system  But the password should be the following -  Enter keystore password   android   This was the only problem in my case   ----- For generating Debug key hash  use this command -  keytool -exportcert -alias androiddebugkey -keystore    android debug keystore   openssl sha1 -binary   openssl base64   Enter keystore password   android   ----- To Generate Release key hash  use this command -  keytool -exportcert -alias  alias of keystore  -keystore  Your path to the keystore when signing app    openssl sha1 -binary   openssl base64   Provide your keystore password after executing this command

User · Answer

I was having the same problem  First log in  just fine  but then  an invalid key hash   The Facebook SDK for Unity gets the wrong key hash  It gets the key from  C  Users  your user  android debug keystore  and  in a perfect world  it should get it from the keystore you created in your project  That s why it is telling you that the key hash is not registered   As suggested by Madi  you can follow the steps on this link to find the right key  Just make sure to point them to the keystore inside your project  Otherwise you won t get the right key

User · Answer

try       PackageInfo info   getPackageManager   getPackageInfo                              www icognix infomedia                              PackageManager GET SIGNATURES       for  Signature signature   info signatures            MessageDigest md   MessageDigest getInstance  SHA            md update signature toByteArray             Log d  YourKeyHash     Base64 encodeToString md digest    Base64 DEFAULT            Log d  YourKeyHash     Base64 encodeToString md digest    Base64 DEFAULT            catch  PackageManager NameNotFoundException e      catch  NoSuchAlgorithmException e

User · Answer

Use the below code in the onCreate   method of your activity   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  NameNotFoundException e      catch  NoSuchAlgorithmException e        Run this code  This will generate the hash key  Copy this KeyHash in the Facebook application setting  and save changes  Then log into your application  This will work perfectly in the future too

User · Answer

According Facebook Login for Android  you must provide the key hash value  In order to obtain it  you will need the key used to sign your application   keytool       -exportcert       -alias YourKeyAlias       -storepass YourStoreKeyPassword       -keystore PathToYourKeyStoreFile   openssl sha1 -binary   openssl base64

User · Answer

If you are typing the keyhash manually  for example from mobile to the Facebook Dashboard   make sure to differentiate between small L and capital I

User · Answer

If you are using Google Play App signing  Open the App signing section in Google Play Console  and get the SHA-1 hash under App signing certificate  Then convert it to Base64  for example with this tool  Hexadecimal - gt  base64 string decoder

User · Answer

I had the same problem   Make sure that you build the APK file with the same device that generated the hashkey which is stored on in the Facebook developers section

User · Answer

If you re generating release key hashes  make sure you enter the actual password of your keystore and not  android    This was my issue  Debug release was working  but the release APK was not

User · Answer

This is how I solved this problem  First you have to get the SHA-1 value  For that there are two ways  To get the SHA-1 value in Android Studio   Click Gradle Click Signing Report Copy the SHA-1 value  OR To get the SHA-1 value from the keystore file  keytool -list -v -keystore keystore file name jks -alias key0  Copy the SHA-1 value to your clipboard like this  CD A1 EA A3 5C 5C 68 FB FA 0A 6B E5 5A 72 64 DD 26 8D 44 84  And open Hexadecimal - gt  Base64 string decoder to convert your SHA-1 value to Base64  This is what Facebook requires  Get the generated hash  quot                         quot  and copy the key hash to the Facebook app

[android] Android Facebook integration with invalid key hash

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