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[Ô­´´] SMP¸ñʽÒôƵÎļþµÄ½âÃÜ(ÀàÐÍ: Òì»ò¼ÓÃÜ)

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whc2001 ·¢±íÓÚ 2019-1-27 07:09
// ÐÂÈË·¢Ìû, ûÓÐʲô¼¼Êõ, ÈçÓдíÎóÇë¶à°üº­, лл

Ç×Æݵĺ¢×Ó¸ÕÉϳõÖÐ, ¹ºÂòÁËһ̨¸´¶Á»ú, ½á¹û·¢ÏÖÕą̂»úÆ÷ʹÓõĸñʽÊÇSMP¸ñʽ, ÎÞ·¨ÓÃÆÕͨ²¥·ÅÆ÷²¥·Å, À´ÕÒÎÒ¿´Äܲ»Äܽâ¾ö.

Îļþ³¤ÕâÑù:
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ת»»ÈÕÖ¾, ûÓÐʲô·¢ÏÖ:
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½«Ò»¸öSMPÎļþÍÏÈëWinHex¿´¿´, ÓеãÒâ˼, ΪʲôÕâô¶à0xA7? (ÄÇЩÆæ¹ÖµÄ±³¾°É«±êʶÊÇ֮ǰÄæÏòÒ»¸öÓÎÏ·×ÊÔ´µÄʱºò×öµÄ±ê¼ÇÍüÁËɾµô)
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Ïëµ½ÁËÒì»ò¼ÓÃÜ, ʹÓñ༭->ÐÞ¸ÄÊý¾Ý, ¶ÔËùÓÐÊý¾Ý½øÐÐÒì»ò0xA7:
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°¡¹þ! ID3¶¼³öÀ´ÁË, Á¢¿Ì±£´æΪMP3¸ñʽ²âÊÔ:
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Õý³£²¥·Å! ÔÙÀ´¿´¿´ÅÔ±ßͬÃûµÄHRC¸ñʽÎļþ:
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àÅ, ûɶͷÐ÷, ²»»áÒ²ÊÇÒì»ò0xA7°É, ÊÔÊÔÔÙ˵:
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»¹ÕæÊÇ! ±£´æΪLRC¸ñʽÎļþ, ·ÅÔÚMP3ͬһĿ¼Ï²âÊÔ:
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´ó³É¹¦!

ÐË·ÜÖ®Óà, ÎÒÉÏÂÛ̳ËÑÁËÒ»ÏÂ, ·¢ÏÖ֮ǰËƺõÓв»ÉÙÈ˶¼Ìáµ½ÁËÕâÖÖ¸ñʽ(ÌØÖ¸²å¿¨ÒôÏä/½âÂë°åÖÐʹÓõÄSMP¸ñʽ, ¶ø²»ÊÇÓÎÏ·×ÊÔ´·â°ü), µ«ËƺõûÓÐÌ«¶àµÄ½â¾ö·½°¸.
ÀýÈç: https://www.52pojie.cn/thread-851703-1-1.html
¸öÈ˵Ä˼·ÊÇ: ²å¿¨ÒôÏäͨ³£Ê¹ÓÃÌض¨µÄ½âÂëоƬ, ÕâÀàоƬÓмòµ¥µÄ¿É±à³Ì¹¦ÄÜ, µ«ÎÞ·¨×öµ½¸´ÔÓºÄʱµÄ²Ù×÷(³ý·ÇÏñÉÏÃæÕâ¸öÌû×Ó¶þ¥˵µÄ, ÓеĽâÂëоƬ·½°¸¿ÉÄÜ´øÓÐÓ²¼þ×ÊÔ´, ½øÐÐÕâÖÖ·½°¸ÌØÓеļÓÃÜ, ¾Í±È½ÏÄÑ°ì), ¶ø´ó¶àÊý±£»¤Ó¦µ±ÊǽÏΪ¼òµ¥¿ÉÒÔ¿ìËÙÍê³ÉµÄ.
ÓÚÊÇÓÃͬһÖÖ·½·¨À´¿´¿´ÉÏÃæÕâ¸öÌû×ÓµÄÎļþ:
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Ŷ, Õâ´ÎûÓÐ0xA7ÁË, µ«ÊÇΪɶ¶àÁËÕâô¶à0x05603515?
»á²»»áÊÇËĸö×Ö½ÚÒ»×é, µÚÒ»×Ö½ÚÒì»ò0x05, µÚ¶þ×Ö½ÚÒì»ò0x60, µÚÈý×Ö½ÚÒì»ò0x35, µÚËÄ×Ö½ÚÒì»ò0x15, µÚÎå×Ö½ÚÒì»ò0x05 ......?
ÊÔÊÔ°É, WinHexËƺõÖ»ÄܶÔÕû¸öÎļþ½øÐе¥¸ö×Ö½ÚµÄÒì»ò, ÄǾÍÒ»¸öÒ»¸öÀ´:
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×¢Ò⻭ȦµÄ²¿·Ö, °´Ë³ÐòÒì»òÖ®ºó³É¹¦×é³ÉÁËMP3-ID3µÄÖ¡Í·(ID3./0x49443303), ˼·ÊǶԵÄ!
ÄÇôдһ¸ö¼òµ¥µÄÊÖ¶¯½âÃܹ¤¾ß°É, È˹¤ÕÒµ½ÃÜÔ¿Ö®ºóÊäÈë½øÈ¥½âÃÜ:
[C#] ´¿Îı¾²é¿´ ¸´ÖÆ´úÂë
using System;
using System.Collections.Generic;
using System.IO;

namespace SmpXorDecrypt
{
    class Program
    {
        private static byte[] HexStringToByteArray(string hex)
        {
            if (hex.Length % 2 != 0)
                hex = "0" + hex;
            List<byte> bytes = new List<byte>();
            for (int i = 0; i < hex.Length; i += 2)
                bytes.Add(byte.Parse(hex.Substring(i, 2), System.Globalization.NumberStyles.AllowHexSpecifier));
            return bytes.ToArray();
        }

        static void Main(string[] args)
        {
            try
            {
                int idx = 0;
                byte[] key = HexStringToByteArray(args[0]);
                byte[] file = File.ReadAllBytes(args[1]);
                string outputExtention = args[2];
                for(long i = 0; i < file.Length; ++i)
                    file[i] ^= key[idx++ % key.Length];
                File.WriteAllBytes($"{args[1].Substring(0, args[1].LastIndexOf('.'))}.{outputExtention}", file);
            }
            catch (Exception ex)
            {
                Console.WriteLine($"´íÎó: {ex}");
            }
        }
    }
}


ʹÓÃ:
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ÏÂÔØ: Á´½Ó: https://pan.baidu.com/s/1d7DiuJclZl1qvCkMYzU_GA ÌáÈ¡Âë: ifkc

Íê±Ï, ¸Ðл¹Û¿´.

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SNmw + 1 + 1 ³ÌÐòÔËÐгö´íÔõôÆÆ£¿ ´íÎó: System.IndexOutOfRangeException: Ë÷Òý³¬³öÁË.
Hmily + 1 + 7 + 1 ¸Ðл·¢²¼Ô­´´×÷Æ·£¬Îá°®ÆƽâÂÛ̳ÒòÄã¸ü¾«²Ê£¡
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¶ÔÕû¸öÎļþ½øÐÐÑ­»·Òì»ò, ÊǵÚÒ»×Ö½ÚÒì»ò0x05, µÚ¶þ×Ö½ÚÒì»ò0x60, µÚÈý×Ö½ÚÒì»ò0x35, µÚËÄ×Ö½ÚÒì»ò0x15, µÚÎå×Ö½ÚÒì»ò0x05, µÚÁù×Ö½ÚÒì»ò0x60......¹¤×÷Á¿ºÜ´ó, ½¨ÒéʹÓÃÎÒÌû×Ó×îºó¸ø³öµÄ¹¤¾ß¸ã¶¨. ÒÔ¼°²»Í¬µÄ»úÆ÷ÃÜÔ¿¿ÉÄܲ»Ò»Ñù, ÕÒÃÜÔ¿µÄ·½·¨ÊÇÓÃÊ®Áù½øÖƱ༭Æ÷´ò¿ªSMPÎļþ, ÔÚÎļþÍ·²¿ºÍβ²¿ÕÒ³öÏÖ´ÎÊý×î¶àµÄÄǼ¸¸ö×Ö½Ú(ÒòΪÎļþͷβ»ù±¾ÉÏÓкܶà0), ±ãÊÇÃÜÔ¿. ÎļþÀàÐÍÒ»°ãÊÇMP3, Èç¹û·Å²»ÁË¿ÉÒ԰ѽâÃÜÖ®ºóµÄÎļþÔÙÓÃÊ®Áù½øÖƱ༭Æ÷´ò¿ªÕÒÆäËûÏßË÷.
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ÎÒ¿´ÁËһϺÃÏñ´ó²¿·ÖÕâÖÖ¸ñʽ¶¼ÊÇÕâÖÖ¼òµ¥µÄÒì»ò¼ÓÃÜ, ÃÜÔ¿Ó¦¸ÃÊÇÔ¤ÏÈд½øÆ·Åƶ©¹ºµÄ½âÂëоƬÀïµÄ.
²»¹ýÂÛ̳ÀïËÑÁËһȦÕÒµ½ÁËÕâ¸öÌû×Ó: https://www.52pojie.cn/thread-799890-1-1.html Õâ¸öSMPËƺõ±È½ÏÌØÊâ, µ¥´ÎÒì»ò½âÃÜÖ®ºóÈÔÈ»²»ÊÇÃ÷ÎÄ, ÉÔ΢¿´ÁË¿´¿¨¿ÇÁË, ÓÐʱ¼äÑо¿Ò»ÏÂ
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ÊÔÊÔ°É, WinHexËƺõÖ»ÄܶÔÕû¸öÎļþ½øÐе¥¸ö×Ö½ÚµÄÒì»ò, ÄǾÍÒ»¸öÒ»¸öÀ´:
  

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