103 lines
3.4 KiB
Java
103 lines
3.4 KiB
Java
package com.zadanie1.mw;
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import android.content.Intent;
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import android.os.Bundle;
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import android.app.Activity;
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import android.view.View;
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import android.widget.Button;
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import android.widget.EditText;
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import android.widget.TextView;
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import android.widget.Toast;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.math.BigInteger;
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import java.nio.charset.Charset;
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import java.nio.charset.StandardCharsets;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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public class FirstPassword extends Activity {
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private static final String FILE_NAME = "passwd.txt";
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public static String SHA512(String s)
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{
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MessageDigest digest;
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String generatedPassword = null;
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String salt = "cnsakn";
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try
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{
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MessageDigest md = MessageDigest.getInstance("SHA-512");
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md.update(salt.getBytes(StandardCharsets.UTF_8));
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byte[] bytes = md.digest(s.getBytes(StandardCharsets.UTF_8));
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < bytes.length; i++) {
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sb.append(Integer.toString((bytes[i] & 0xff) + 0x100, 16).substring(1));
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}
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generatedPassword = sb.toString();
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}
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catch (NoSuchAlgorithmException e)
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{
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e.printStackTrace();
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}
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return generatedPassword;
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}
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_first_password);
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final EditText newpassword;
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final EditText renewpassword;
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Button confirm;
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newpassword = (EditText) findViewById(R.id.newpassword);
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renewpassword = (EditText) findViewById(R.id.renewpassword);
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confirm = (Button) findViewById(R.id.button);
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confirm.setOnClickListener(new View.OnClickListener() {
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public void onClick(View arg0) {
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if (newpassword.getText().toString().equals(renewpassword.getText().toString())) {
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String text = SHA512(newpassword.getText().toString());
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FileOutputStream fos = null;
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try {
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fos = openFileOutput(FILE_NAME, MODE_PRIVATE);
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fos.write(text.getBytes());
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Toast toast = Toast.makeText(getApplicationContext(),
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"Password has been changed",
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Toast.LENGTH_SHORT);
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toast.show();
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} catch (FileNotFoundException e) {
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e.printStackTrace();
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} catch (IOException e) {
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e.printStackTrace();
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} finally {
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if (fos != null) {
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try {
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fos.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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onBackPressed();
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}
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else
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{
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Toast toast = Toast.makeText(getApplicationContext(),
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"Password has NOT been changed",
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Toast.LENGTH_SHORT);
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toast.show();
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}
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}
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});
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}
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} |