更新 Crypt.java

Author: shulng

src/main/java/cc/baka9/catseedlogin/util/Crypt.java

@@ -1,30 +1,33 @@
 package cc.baka9.catseedlogin.util;
 
-import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 
 public class Crypt {
 
-    private static final char[] CRYPTCHARS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
+    private static final String PREFIX = "ÜÄaeut//&/=I ";
+    private static final String SUFFIX = "7421€547__+IÄIH§%NK ";
+    private static final char[] HEX_CHARS = "0123456789abcdef".toCharArray();
 
     public static String encrypt(String name, String password) {
+        String text = PREFIX + password + SUFFIX + name + password;
         try {
             MessageDigest md = MessageDigest.getInstance("SHA-512");
-            md.update(("ÜÄaeut//&/=I " + password + "7421€547" + name + "__+IÄIH§%NK " + password).getBytes(StandardCharsets.UTF_8));
-            return toHexString(md.digest());
+            byte[] hashedBytes = md.digest(text.getBytes());
+            return toHexString(hashedBytes);
         } catch (NoSuchAlgorithmException e) {
             return null;
         }
     }
 
     private static String toHexString(byte[] bytes) {
-        char[] chars = new char[bytes.length * 2];
+        char[] hexChars = new char[bytes.length * 2];
         for (int i = 0, j = 0; i < bytes.length; i++) {
-            chars[j++] = CRYPTCHARS[(bytes[i] >> 4) & 0xF];
-            chars[j++] = CRYPTCHARS[bytes[i] & 0xF];
+            int b = bytes[i] & 0xFF;
+            hexChars[j++] = HEX_CHARS[b >> 4];
+            hexChars[j++] = HEX_CHARS[b & 0x0F];
         }
-        return new String(chars);
+        return new String(hexChars);
     }
 
     public static boolean match(String name, String password, String encrypted) {