How to store password encrypted in database?

Question

I am trying to store the password into the database in the encrypted form with the help of JSP and Servlets. How I can do that?

Solution

Self-written algorithms are a security risk, and painful to maintain.
MD5 is not secure.

Use the bcrypt algorithm, provided by jBcrypt (open source):

// Hash a password
String hashed = BCrypt.hashpw(password, BCrypt.gensalt());

// Check that an unencrypted password matches or not
if (BCrypt.checkpw(candidate, hashed))
    System.out.println("It matches");
else
    System.out.println("It does not match");

If you use Maven, you can get the library by inserting the following dependency in your pom.xml (if a newer version is available please let me know):

<dependency>
    <groupId>de.svenkubiak</groupId>
    <artifactId>jBCrypt</artifactId>
    <version>0.4.1</version>
</dependency>