如何在Java中使用SHA-512散列密码？ [英] How to hash a password with SHA-512 in Java?

问题描述

我一直在研究Java String加密技术，遗憾的是我还没有找到任何关于如何在Java中使用SHA-512散列String的好教程。我读了一些关于MD5和Base64的博客，但它们并不像我想的那样安全（实际上，Base64不是加密技术），所以我更喜欢SHA-512。

I've been investigating a bit about Java String encryption techniques and unfortunately I haven't find any good tutorial how to hash String with SHA-512 in Java; I read a few blogs about MD5 and Base64, but they are not as secure as I'd like to (actually, Base64 is not an encryption technique), so I prefer SHA-512.

推荐答案

你可以将它用于SHA-512

you can use this for SHA-512

import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public String get_SHA_512_SecurePassword(String passwordToHash, String   salt){
String generatedPassword = null;
    try {
         MessageDigest md = MessageDigest.getInstance("SHA-512");
         md.update(salt.getBytes(StandardCharsets.UTF_8));
         byte[] bytes = md.digest(passwordToHash.getBytes(StandardCharsets.UTF_8));
         StringBuilder sb = new StringBuilder();
         for(int i=0; i< bytes.length ;i++){
            sb.append(Integer.toString((bytes[i] & 0xff) + 0x100, 16).substring(1));
         }
         generatedPassword = sb.toString();
        } 
       catch (NoSuchAlgorithmException e){
        e.printStackTrace();
       }
    return generatedPassword;
}

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