A simple md5 encryption

The project is a maven project, first add the following dependencies to pom.xml.

<dependency>
    <groupId>commons-codec</groupId>
    <artifactId>commons-codec</artifactId>
</dependency>

<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
    <version>3.6</version>
</dependency>

Write the tool class MD5Utils.java

The algorithm tool class DigestUtils is mainly used , which is located in the package directory org.apache.commons.codec.digest.

public class MD5Utils {

    private static final String salt = "1h2s3w";

    private static String MD5 (String src) {
        return DigestUtils.md5Hex(src);
    }

    /*
     * Enter password to form password
     * @author hsw
     * @date 2018/4/24 21:22
     * @param [inputPass]
     * @return java.lang.String
     */
    public static String inputPassToFormPass(String inputPass) {
        return MD5(salt.charAt(0) + salt.charAt(4) + salt.charAt(3) +
                inputPass + salt.charAt(2) + salt.charAt(1) + salt.charAt(5));
    }

    /*
     * Convert form password to stored password
     * @author hsw
     * @date 2018/4/24 21:22
     * @param [formPass, salt]
     * @return java.lang.String
     */
    public static String formPassToDBPass(String formPass, String salt) {
        return MD5(salt.charAt(0) + salt.charAt(4) + salt.charAt(3) +
                formPass + salt.charAt(2) + salt.charAt(1) + salt.charAt(5));
    }

    public static String inputPassToDbPass (String inputPass, String salt) {
        String formPass = inputPassToFormPass(inputPass);
        String DBPass = formPassToDBPass(formPass,salt);
        return DBPass;
    }

    public static void main(String[] args) {
        String inputPass = "hsw666666";
        String salt = "2311231";
        String res = inputPassToDbPass(inputPass,salt);
        System.out.println(res);
    }


}

In the tool class, md5 encryption is performed on the entered password twice. The first time the input password is converted to a form password with a fixed salt, the second time the form password is converted to a stored password with a custom salt, and the input password is encrypted twice.

The main method test result is: 7e6b9947fdda3d5a777972bdd49865f3