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CnVCL 组件包
» CnCRC32的BUG
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Subject: CnCRC32的BUG
moremay
新警察
UID 42200
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Registered 2009-4-16
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#1
Post at 2009-4-16 10:36
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P.M.
CnCRC32的BUG
此BUG好像一直存在,没人报告吗?
20090404版
CRC32Calc 函数
130 SHR EAX, 8
131 AND EAX, $00FFFFFF // shr 是用0填补高位,多余?
132 XOR EAX, [EBX + ESI]
TCRC32Table不是字节数组,EBX应该×4:
XOR EAX, [EBX*4 + ESI]
标号@Upd及@Exit前应该对CRC值异或
XOR EAX,-1
函数FileCRC32
187 CRC:=not CRC;
应该删除
moremay
新警察
UID 42200
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Registered 2009-4-16
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#2
Post at 2009-4-16 10:39
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P.M.
2008-7-28的帖子
http://bbs.cnpack.org/viewthread.php?tid=2178&extra=page%3D1
提到的与用Magic SFV & MD5校验出来的crc值不一样应该就是此BUG造成的
Passion
(LiuXiao)
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#3
Post at 2009-4-16 10:44
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P.M.
谢谢报告,我们检查一下。
Passion
(LiuXiao)
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UID 359
Digest Posts
19
Credits 6838
Posts 3591
点点分 6838
Reading Access 102
Registered 2004-3-28
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#4
Post at 2009-4-16 16:00
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P.M.
的确如楼主所说,此段代码存在bug。
感谢报告,目前此问题已修正。楼主也进入我们的有贡献人员名单。
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