Java加密之SHA加鹽
阿新 • • 發佈:2018-12-09
import java.math.BigInteger; import java.security.MessageDigest; import java.security.SecureRandom; import java.util.HashMap; import java.util.Map; public class SHA { public static final String KEY_SHA = "SHA"; public static final String ra="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; /** * 字串sha加密 * @param s 要加密的字串 * @return 加密後的字串 */ public static String sha(String s) { BigInteger sha =null; byte[] bys = s.getBytes(); try { MessageDigest messageDigest = MessageDigest.getInstance(KEY_SHA); messageDigest.update(bys); sha = new BigInteger(messageDigest.digest()); } catch (Exception e) { e.printStackTrace(); } return sha.toString(32); } /** * 字串+隨機鹽 sha加密 * @param s 要加密的字串 * @return 鹽和加密後的字串 */ public static Map<String,String> getResult(String s){ Map<String,String> map=new HashMap<String,String>(); String salt=getSalt(); map.put("salt", salt);//鹽 map.put("password", sha(s+salt));//加密後的密碼 return map; } /** * 生成隨機鹽 * @return 隨機生成的鹽 */ private static String getSalt() { SecureRandom random=new SecureRandom(); int length=random.nextInt(5)+8;//鹽的長度,這裡是8-12可自行調整 char[] text = new char[length]; for (int i = 0; i < length; i++) { text[i] = ra.charAt(random.nextInt(ra.length())); } return new String(text); } /** * 測試方法 * @param args */ public static void main(String[] args) { System.out.println(getResult("12345678")); }