Java 哈希密码

Question

我正在尝试创建一个循环，从数组列表中获取密码，对它们进行哈希处理，然后将经过哈希处理的密码传递回 Person 对象。

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;
}
}

<小时/>

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;
}

}

目前我只是让循环打印出纯文本密码，然后结束循环。 任何帮助都会很棒。非常感谢。

Answer 1

您可以使用 SHA1 摘要。请参阅下面从纯字符串创建摘要的示例。 (您需要将明文密码的 byte[] 传递给 SHAsum()。我假设您熟悉 String.getBytes() 方法)

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();
}

使用上述方法对密码进行哈希处理，并将哈希值 (SHA1) 存储在 Person 类中