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?
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){
}
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.
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) {
}
}
Solved mine too in Android Studio but with slight different approach.
To get the SHA-1 value in Android Studio.
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
To get the Android key hash code, follow these steps:
cd C:\Program Files\Java\jdk1.6.0_26\bin
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
I've created a small tool for Windows and Mac OS 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. :)
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) {
}
In Android Studio just click on right sidebar panel "Gradle" 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.
download openSSL for windows in here you can find 64bit and 32bit here
extract the downloaded file
C:\Users\username\.android\debug.keystore
keytool -exportcert -alias androiddebugkey -keystore C:\Users\username.android\debug.keystore | "C:\openSSL\bin\openssl" sha1 -binary | "C:\openSSL\bin\openssl" base64
The simplest solution:
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.
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 + " -> 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 <-
Enjoy :)
try this :
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());
}
}
I have done by this way for Linux OS & Windows OS:
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.
Steps for Release Hashkey:
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.
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
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.
As answered on a similar issue i found this to be working for me:
apkname.apk
file you want to know the hash of to the 'Java\jdk1.7.0_79\bin' folderkeytool -list -printcert -jarfile apkname.apk
SHA1
value and convert it using this site[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 ;)
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>keytool -exportcert -alias my_key -keystore my.keystore -storepass PASSWORD > mycert.bin
C:\Users\Me>openssl sha1 -binary mycert.bin > sha1.bin
C:\Users\Me>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.
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.
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 - > 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 -> android ...
5) you will get 28 characters that will be your has key
The simplest solution I have found is this:
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.
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
For more info visit here
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.
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.
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>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.
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.
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.
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 & 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.
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 <aliasName> -keystore <keystoreFilePath> | 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.
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:
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());
}
}
});
}
}
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 <RELEASE_KEY_ALIAS> -keystore <RELEASE_KEY_PATH> | 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
Source: Stackoverflow.com