好象修改一下通用MD5中一小部分,就可以使之成为个人专用的MD5算法? 以前听说过什么变形算法之类的,好象修改一下通用MD5中一小部分,就可以使之成为个人专用的MD5算法?请教各位大侠如何修改?万分感谢!!! 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 MD5 有三处变形,变形没有什么新意,还是老一套:(1) 四个变量的变形(2) 数据填充变形(3) 参与 HASH 运算的变量的顺序变形,HASH 本身没有变形在什么地方改呀?如何改? 用通用MD5又有什么关系,反正是不可逆的 *****************************************************************************欢迎使用CSDN论坛阅读器 : CSDN Reader(附全部源代码) http://www.cnblogs.com/feiyun0112/archive/2006/09/20/509783.html (1) 四个变量的变形,指的是下面这四个吗?是不是后面的数据可以任意改?Private Sub MD5Init() ByteCounter = 0 State(1) = UnsignedToLong(1732584193#) State(2) = UnsignedToLong(4023233417#) State(3) = UnsignedToLong(2562383102#) State(4) = UnsignedToLong(271733878#)End Sub 下面代码中的数字部分是不是也可以任意改动?Private Sub MD5Transform(Buffer() As Byte) Dim x(16) As Long, a As Long, b As Long, C As Long, D As Long a = State(1) b = State(2) C = State(3) D = State(4) Decode 64, x, Buffer FF a, b, C, D, x(0), S11, -680876936 FF D, a, b, C, x(1), S12, -389564586 FF C, D, a, b, x(2), S13, 606105819 FF b, C, D, a, x(3), S14, -1044525330 FF a, b, C, D, x(4), S11, -176418897 FF D, a, b, C, x(5), S12, 1200080426 FF C, D, a, b, x(6), S13, -1473231341 FF b, C, D, a, x(7), S14, -45705983 FF a, b, C, D, x(8), S11, 1770035416 FF D, a, b, C, x(9), S12, -1958414417 FF C, D, a, b, x(10), S13, -42063 FF b, C, D, a, x(11), S14, -1990404162 FF a, b, C, D, x(12), S11, 1804603682 FF D, a, b, C, x(13), S12, -40341101 FF C, D, a, b, x(14), S13, -1502002290 FF b, C, D, a, x(15), S14, 1236535329 GG a, b, C, D, x(1), S21, -165796510 GG D, a, b, C, x(6), S22, -1069501632 GG C, D, a, b, x(11), S23, 643717713 GG b, C, D, a, x(0), S24, -373897302 GG a, b, C, D, x(5), S21, -701558691 GG D, a, b, C, x(10), S22, 38016083 GG C, D, a, b, x(15), S23, -660478335 GG b, C, D, a, x(4), S24, -405537848 GG a, b, C, D, x(9), S21, 568446438 GG D, a, b, C, x(14), S22, -1019803690 GG C, D, a, b, x(3), S23, -187363961 GG b, C, D, a, x(8), S24, 1163531501 GG a, b, C, D, x(13), S21, -1444681467 GG D, a, b, C, x(2), S22, -51403784 GG C, D, a, b, x(7), S23, 1735328473 GG b, C, D, a, x(12), S24, -1926607734 HH a, b, C, D, x(5), S31, -378558 HH D, a, b, C, x(8), S32, -2022574463 HH C, D, a, b, x(11), S33, 1839030562 HH b, C, D, a, x(14), S34, -35309556 HH a, b, C, D, x(1), S31, -1530992060 HH D, a, b, C, x(4), S32, 1272893353 HH C, D, a, b, x(7), S33, -155497632 HH b, C, D, a, x(10), S34, -1094730640 HH a, b, C, D, x(13), S31, 681279174 HH D, a, b, C, x(0), S32, -358537222 HH C, D, a, b, x(3), S33, -722521979 HH b, C, D, a, x(6), S34, 76029189 HH a, b, C, D, x(9), S31, -640364487 HH D, a, b, C, x(12), S32, -421815835 HH C, D, a, b, x(15), S33, 530742520 HH b, C, D, a, x(2), S34, -995338651 II a, b, C, D, x(0), S41, -198630844 II D, a, b, C, x(7), S42, 1126891415 II C, D, a, b, x(14), S43, -1416354905 II b, C, D, a, x(5), S44, -57434055 II a, b, C, D, x(12), S41, 1700485571 II D, a, b, C, x(3), S42, -1894986606 II C, D, a, b, x(10), S43, -1051523 II b, C, D, a, x(1), S44, -2054922799 II a, b, C, D, x(8), S41, 1873313359 II D, a, b, C, x(15), S42, -30611744 II C, D, a, b, x(6), S43, -1560198380 II b, C, D, a, x(13), S44, 1309151649 II a, b, C, D, x(4), S41, -145523070 II D, a, b, C, x(11), S42, -1120210379 II C, D, a, b, x(2), S43, 718787259 II b, C, D, a, x(9), S44, -343485551 State(1) = LongOverflowAdd(State(1), a) State(2) = LongOverflowAdd(State(2), b) State(3) = LongOverflowAdd(State(3), C) State(4) = LongOverflowAdd(State(4), D)End Sub高手不在? 关于参数传递--参数个数不确定如何解决?! 怎么办? 满分求助listbox问题。 请大家帮忙 请问如何通过滚动条控制窗口中的内容,急,在线等 数组次数统计 对一个表的增加纪录???? VB 爱好者进来看一下! 在VB中如保判断定义的数组是一维还是多维 用哪个api能得到当前文本字符数 急问,在使用笔记本触摸板时,如何用VB程序记录下手指移动的次数 一个关于函数互斥的问题
(1) 四个变量的变形
(2) 数据填充变形
(3) 参与 HASH 运算的变量的顺序变形,HASH 本身没有变形
在什么地方改呀?如何改?
*****************************************************************************
欢迎使用CSDN论坛阅读器 : CSDN Reader(附全部源代码)
http://www.cnblogs.com/feiyun0112/archive/2006/09/20/509783.html
ByteCounter = 0
State(1) = UnsignedToLong(1732584193#)
State(2) = UnsignedToLong(4023233417#)
State(3) = UnsignedToLong(2562383102#)
State(4) = UnsignedToLong(271733878#)
End Sub
Dim x(16) As Long, a As Long, b As Long, C As Long, D As Long a = State(1)
b = State(2)
C = State(3)
D = State(4)
Decode 64, x, Buffer
FF a, b, C, D, x(0), S11, -680876936
FF D, a, b, C, x(1), S12, -389564586
FF C, D, a, b, x(2), S13, 606105819
FF b, C, D, a, x(3), S14, -1044525330
FF a, b, C, D, x(4), S11, -176418897
FF D, a, b, C, x(5), S12, 1200080426
FF C, D, a, b, x(6), S13, -1473231341
FF b, C, D, a, x(7), S14, -45705983
FF a, b, C, D, x(8), S11, 1770035416
FF D, a, b, C, x(9), S12, -1958414417
FF C, D, a, b, x(10), S13, -42063
FF b, C, D, a, x(11), S14, -1990404162
FF a, b, C, D, x(12), S11, 1804603682
FF D, a, b, C, x(13), S12, -40341101
FF C, D, a, b, x(14), S13, -1502002290
FF b, C, D, a, x(15), S14, 1236535329 GG a, b, C, D, x(1), S21, -165796510
GG D, a, b, C, x(6), S22, -1069501632
GG C, D, a, b, x(11), S23, 643717713
GG b, C, D, a, x(0), S24, -373897302
GG a, b, C, D, x(5), S21, -701558691
GG D, a, b, C, x(10), S22, 38016083
GG C, D, a, b, x(15), S23, -660478335
GG b, C, D, a, x(4), S24, -405537848
GG a, b, C, D, x(9), S21, 568446438
GG D, a, b, C, x(14), S22, -1019803690
GG C, D, a, b, x(3), S23, -187363961
GG b, C, D, a, x(8), S24, 1163531501
GG a, b, C, D, x(13), S21, -1444681467
GG D, a, b, C, x(2), S22, -51403784
GG C, D, a, b, x(7), S23, 1735328473
GG b, C, D, a, x(12), S24, -1926607734 HH a, b, C, D, x(5), S31, -378558
HH D, a, b, C, x(8), S32, -2022574463
HH C, D, a, b, x(11), S33, 1839030562
HH b, C, D, a, x(14), S34, -35309556
HH a, b, C, D, x(1), S31, -1530992060
HH D, a, b, C, x(4), S32, 1272893353
HH C, D, a, b, x(7), S33, -155497632
HH b, C, D, a, x(10), S34, -1094730640
HH a, b, C, D, x(13), S31, 681279174
HH D, a, b, C, x(0), S32, -358537222
HH C, D, a, b, x(3), S33, -722521979
HH b, C, D, a, x(6), S34, 76029189
HH a, b, C, D, x(9), S31, -640364487
HH D, a, b, C, x(12), S32, -421815835
HH C, D, a, b, x(15), S33, 530742520
HH b, C, D, a, x(2), S34, -995338651 II a, b, C, D, x(0), S41, -198630844
II D, a, b, C, x(7), S42, 1126891415
II C, D, a, b, x(14), S43, -1416354905
II b, C, D, a, x(5), S44, -57434055
II a, b, C, D, x(12), S41, 1700485571
II D, a, b, C, x(3), S42, -1894986606
II C, D, a, b, x(10), S43, -1051523
II b, C, D, a, x(1), S44, -2054922799
II a, b, C, D, x(8), S41, 1873313359
II D, a, b, C, x(15), S42, -30611744
II C, D, a, b, x(6), S43, -1560198380
II b, C, D, a, x(13), S44, 1309151649
II a, b, C, D, x(4), S41, -145523070
II D, a, b, C, x(11), S42, -1120210379
II C, D, a, b, x(2), S43, 718787259
II b, C, D, a, x(9), S44, -343485551 State(1) = LongOverflowAdd(State(1), a)
State(2) = LongOverflowAdd(State(2), b)
State(3) = LongOverflowAdd(State(3), C)
State(4) = LongOverflowAdd(State(4), D)
End Sub高手不在?