Added the getSalt and enryptPassWithSalt private mothods to the UsersDBHelper class

Author: werfish

app/src/main/java/com/example/werfish/praticeapp/UsersDBHelper.java

@@ -9,6 +9,8 @@
 
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+import java.security.SecureRandom;
 import java.util.ArrayList;
 import java.util.HashMap;
 
@@ -128,19 +130,51 @@ public Boolean emailExists(String email) {
     private String encryptPass(String pass){
         StringBuffer sb = new StringBuffer();
         try{
-        MessageDigest md = MessageDigest.getInstance("SHA-256");
-        md.update(pass.getBytes());
-        byte byteData[] = md.digest();
+            MessageDigest md = MessageDigest.getInstance("SHA-256");
+            md.update(pass.getBytes());
+            byte byteData[] = md.digest();
 
 
-        for(int i = 0; i < byteData.length; i++)
-            sb.append(Integer.toString((byteData[i] & 0xFF) + 0x100, 16).substring(1));
+            for(int i = 0; i < byteData.length; i++)
+                sb.append(Integer.toString((byteData[i] & 0xFF) + 0x100, 16).substring(1));
 
         } catch (NoSuchAlgorithmException e1) {
             // TODO Auto-generated catch block
             e1.printStackTrace();
         }
         return sb.toString();
     }
+
+    private String encryptPassWithSalt(String pass, byte[] salt){
+        StringBuffer sb = new StringBuffer();
+        try{
+            MessageDigest md = MessageDigest.getInstance("SHA-256");
+            md.update(salt);
+            md.update(pass.getBytes());
+            byte byteData[] = md.digest();
+            
+            for(int i = 0; i < byteData.length; i++)
+                sb.append(Integer.toString((byteData[i] & 0xFF) + 0x100, 16).substring(1));
+
+        } catch (NoSuchAlgorithmException e1) {
+            // TODO Auto-generated catch block
+            e1.printStackTrace();
+        }
+        return sb.toString();
+    }
+
+    //Add salt
+    private byte[] getSalt() throws NoSuchAlgorithmException, NoSuchProviderException
+    {
+        //Always use a SecureRandom generator
+        SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
+        //Create array for salt
+        byte[] salt = new byte[32];
+        //Get a random salt
+        sr.nextBytes(salt);
+        //return salt
+        return salt;
+    }
+}
 }