Java Web desde cero en Netbeans ☁️[18.- JSP Encriptar contraseñas]
En este tutorial vamos a encriptar nuestras contraseñas a la hora de gurdarlas en la bd y tambien cuando se hace el login del usuario.
Codigo: https://github.com/programadornovato/javaWeb/commit/1c206b028e26cf165e41a98b3b06c07e945be628
<%@page import="java.math.BigInteger"%>
<%@page import="java.security.MessageDigest"%>
<%@page import="java.sql.*"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-wvfXpqpZZVQGK6TAh5PVlGOfQNHSoD2xbE+QkPxCAFlNEevoEH3Sl0sibVcOQVnN" crossorigin="anonymous">
<title>Usuario</title>
</head>
<body>
<%
HttpSession sesion = request.getSession();
if (sesion.getAttribute("logueado") == null || sesion.getAttribute("logueado").equals("0")) {
response.sendRedirect("login.jsp");
}
Connection con = null;
Statement st = null;
%>
<div class="container mt-5">
<div class="row">
<div class="col-sm">
<form action="datosUsuario.jsp" method="post">
<div class="form-group">
<label >User</label>
<input type="text" class="form-control" name="user" placeholder="user" value="<%= sesion.getAttribute("user")%>" >
</div>
<div class="form-group">
<label >Password</label>
<input type="text" class="form-control" name="password1" placeholder="password">
</div>
<div class="form-group">
<label >Respita su password</label>
<input type="text" class="form-control" name="password2" placeholder="Repita su password">
</div>
<button type="submit" name="guardar" class="btn btn-primary">Guardar</button>
<a href="index.jsp" class="btn btn-danger">Cancelar</a>
</form>
</div>
</div>
</div>
</body>
<%
if (request.getParameter("guardar") != null) {
String user = request.getParameter("user");
String password1 = request.getParameter("password1");
String password2 = request.getParameter("password2");
if (password1.equals(password2)) {
try {
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost/jsp?user=eugenio&password=123456");
st = con.createStatement();
st.executeUpdate("update user set user='" + user + "',password='" + getMD5(password1) + "' where id='" + sesion.getAttribute("id") + "';");
sesion.setAttribute("user", user);
response.sendRedirect("index.jsp");
} catch (Exception e) {
out.print(e);
}
}
else{
out.print("Password no coincide");
}
}
%>
</html>
<%!
public String getMD5(String input) {
try {
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] encBytes = md.digest(input.getBytes());
BigInteger numero = new BigInteger(1, encBytes);
String encString = numero.toString(16);
while (encString.length() < 32) {
encString = "0" + encString;
}
return encString;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
%>
Generador md5: http://www.md5.cz/
![☕ Java Web desde cero en Netbeans ☁️[18.- JSP Encriptar contraseñas]](https://i.ytimg.com/vi/T9QcOeohZIg/hqdefault.jpg "Java Web desde cero en Netbeans ☁️[18.- JSP Encriptar contraseñas] 2")
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