androidfacebookcodesign

Is there any way to get key hash from signed APK?

Is there any way to get key hash from signed APK? We have a signed Android apk file, and we want to find out key hash of this APK, for Facebook SDK. Can we do that by something like jarsigner?
Any suggestions?

Solution

  • For windows users getting the key from openssl, may be tricky some times.. I always use this to find the right signature.. Just paste this code in your onCreate() and run. 

     // Add code to print out the key hash
  try {
  PackageInfo info = getPackageManager().getPackageInfo(getPackageName(), PackageManager.GET_SIGNATURES);
  for (Signature signature : info.signatures) {
  MessageDigest md = MessageDigest.getInstance("SHA");
  md.update(signature.toByteArray());
  Log.e("MY KEY HASH:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
      }
  } catch (NameNotFoundException e) {

  } catch (NoSuchAlgorithmException e) {

  }

    Update:

    Using Android studio(2.1.2):

    1. Open your project on studio and click on the gradle icon.
    2. Choose your app -> Tasks -> android -> SigningReport

    This will run a gradle task that will print the debug and release certificate with md5 and sha1 keys