SecurityUtils.java

package org.michenux.drodrolib.security;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.Signature;
import android.util.Base64;
import android.util.Log;

import org.michenux.drodrolib.MCXApplication;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class SecurityUtils {
    public static String logHashKey(Context context) {
        try {
            PackageInfo info = context.getPackageManager().getPackageInfo(
                    context.getPackageName(),
                    PackageManager.GET_SIGNATURES);
            for (Signature signature : info.signatures) {
                MessageDigest md = MessageDigest.getInstance("SHA");
                md.update(signature.toByteArray());
                return Base64.encodeToString(md.digest(), Base64.DEFAULT);
            }
        } catch (PackageManager.NameNotFoundException e) {
            Log.e(MCXApplication.LOG_TAG, "logHashKey error", e);
        } catch (NoSuchAlgorithmException e) {
            Log.e(MCXApplication.LOG_TAG, "logHashKey error", e);
        }
        return null;
    }
}