Java的散列密码 [英] Java hashing passwords

问题描述

我试图做一个循环，它从一个数组列表获取密码，散列它们，然后通过散列密码回Person对象。

I am trying to make a loop that gets passwords from an array list, hashes them, and then passes the hashed passwords back into a Person object.

import java.util.ArrayList;

public class CompanyDatabase    {

public ArrayList<Person> getPeople() {
    ArrayList<Person> people = new ArrayList<Person>();
    String[] u = {"Joe","Stan","Leo","John","Sara","Lauren"};
    String[] p = {"pass4321", "asdfjkl", "genericpw", "13579", "helloworld", "companypass"};
    for(int j = 0; j < u.length; j++){
        Person temp = new Person(u[j],p[j]);
        people.add(temp);
    }
    return people;
}
}

---

import java.util.ArrayList;  
import java.util.Scanner;  
public class CompanyDatabaseDriver {  
    private static Scanner scan = new Scanner( System.in ) );  
    public static void main(String args[]) {  

            CompanyDatabase bcData = new CompanyDatabase();  
            ArrayList<Person> people = bcData.getPeople();    

            Hash_SHA hasher = new Hash_SHA(); 



            for(int i=0;i<people.size();i++){

                 System.out.println(people.get(i).getPassword());   
            }
             // i know i have to use a variation of 
             // String hashString = hasher.getHash(passString); 
             // but do not really know what to do with it



   }  

}

public class Person {

private String username;
private String password;

public Person(String un, String pw){
    username = un;
    password = pw;
}

public void setUsername(String un){
    username = un;
}

public void setPassword(String pw){
    password = pw;
}

public String getUsername(){
    return username;
}

public String getPassword(){
    return password;
}

}

目前我只是有循环打印出明文密码，然后结束循环。
任何帮助将是惊人的。非常感谢你。

Currently I just have the loop printing out the plain text passwords and then ending the loop. Any help would be amazing. Thank you very much.

推荐答案

您可以使用SHA1 diggest。请参阅创建从下面普通字符串diggest的例子。
（您威尔需要通过字节[] 您的普通密码的 SHAsum（）。我假设你熟悉 String.getBytes（ ）法）

You can use SHA1 diggest. See the example of creating a diggest from plain string below. (You weill need to pass the byte[] of your plain password to the SHAsum(). I assume that you are familiar with String.getBytes() method)

import java.security.MessageDigest;

public static String SHAsum(byte[] convertme) throws NoSuchAlgorithmException{
    MessageDigest md = MessageDigest.getInstance("SHA-1"); 
    return byteArray2Hex(md.digest(convertme));
}

private static String byteArray2Hex(final byte[] hash) {
    Formatter formatter = new Formatter();
    for (byte b : hash) {
        formatter.format("%02x", b);
    }
    return formatter.toString();
}

使用上述方法计算散列密码，并在人类存储散列值（SHA1）

Use the methods above to hash the passwords and store in the Person class the hashed value (SHA1)

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