求教这种是不是MD5编码,怎么编码和解码?2E3FAB4467222D89B8D0ACD979B66F9B

哎呀大侠来了.多谢! 是我表述有点凌乱了. 不是的, 我本意不是要解码, 而是想求解它的正向编码过程, 就是比如这个数字11529536 是怎么编码成这个的:
2E3FAB4467222D89B8D0ACD979B66F9B这个是人家编码的, 我想知道它的编码机制. 我举的例子三组字符串就是一一对应的它的编码前后样子. 数字是编码前, 32位的字符串是编码后, 我也不知道是不是MD5还是什么. 完全没接触过MD5. 非常感谢解答!

MD5算法是确定的，
你只要计算出该文本对应的MD5码跟它是否一致，
不就知道是不是MD5编码了吗！

文本编码格式不同，计算出来的MD5也不同。
不过常用格式不外乎ANSI、UTF-8、UTF16
你的是纯数字，文本编码ANSI和UTF-8相同，
因此文本格式你只要试ANSI和UTF-16(这个就是VB6本身的String格式)这两种，
或者，外加这个值对应的Long值、Single、Double值的MD5如果没有相符的，那也有可能是明文经某种“加密”变换后，再计算MD5。
如果别人是这样处理的，
相猜测别人的算法，就非常之难了。

多谢! vb怎么转MD5我都不会, 我去搜一下. 多谢!

不是简单的MD5加密, 我试过了,结果对比如下, 不知道借大神慧眼能不能看出有什么规律?
11529536
md5:
C3BC54914FC279F8DDCA3B536185068D
人家的加密结果:
2E3FAB4467222D89B8D0ACD979B66F9B

12527208
md5:
6AD43160E4F007ADB42DFD77BA4DDC4D
人家的加密结果:
E41D4E6D4522D8E627E9152F9E7FE72F

11342746
md5:
51BB6141816149BEB2C1A43CB3400711
人家的加密结果:
72FD230F887C38B0A2372139F71BE9C2

不仅如此，在摘要算法协议中，还有一类是“有密钥的摘要算法”，即使用一个密钥对消息异或，然后再求 Hash 值。密钥的长度小于消息时，一般是采用反复连接的方式。因为 MD5 是单向的，反推密钥还是有一定困难。如果你确认是 MD5 算法，可以通过穷举法找出密钥，毕竟你的消息较短。

今天在公司里，我编写了一段代码来试。
感觉它应该不是直接MD5出来的。
比如楼主的第一个: 11529536
文本格式按ANSI、UTF16编码，
四字节整数按40 ED AF 00、00 AF ED 40，
以及它的16进制编码文本以大写、小写、
加0x开头、加&H开头等等非常多的组合方式，
计算出来的MD5没有与楼主说的一致的。

另外，楼主计算MD5是怎样编码的？
我算出来的也没有与你算的相同的啊。我这儿把你那3个数以文本来计算MD5：
11529536
UTF-8 :00AB2D8B51B4E8CEE31EE4222200B4A9
UTF16 :F10F04EA2A8073DDD5B45D75E51CB03512527208
UTF-8 :DA5F497A4F2A5588FEB9CDD6E02FE486
UTF16 :DA54ACB4F9F46CEE5C41C272D043AE2011342746
UTF-8 :AA38B1C5D94E16CCD63B01B0DF4B26DC
UTF16 :A1E786EEEF3D4D47193B105B88FE22F5

非常感谢!!
我是后来网上搜来的一个vb6的代码算出的结果:[code=vb]
'调用
Text1 = md5(Text2)
'下为模块
Option Explicit
Private Const OFFSET_4 = 4294967296#
Private Const MAXINT_4 = 2147483647
Private Const S11 = 7
Private Const S12 = 12
Private Const S13 = 17
Private Const S14 = 22
Private Const S21 = 5
Private Const S22 = 9
Private Const S23 = 14
Private Const S24 = 20
Private Const S31 = 4
Private Const S32 = 11
Private Const S33 = 16
Private Const S34 = 23
Private Const S41 = 6
Private Const S42 = 10
Private Const S43 = 15
Private Const S44 = 21'=
'= Class Variables
'=
Private State(4) As Long
Private ByteCounter As Long
Private ByteBuffer(63) As Byte'=
'= Class Properties
'=
Property Get RegisterA() As String
    RegisterA = State(1)
End Property
Property Get RegisterB() As String
    RegisterB = State(2)
End Property
Property Get RegisterC() As String
    RegisterC = State(3)
End Property
Property Get RegisterD() As String
    RegisterD = State(4)
End Property'=
'= Class Functions
'=
'
' Function to quickly digest a file into a hex string
'
Public Function DigestFileToHexStr(FileName As String) As String
    Open FileName For Binary Access Read As #1
    MD5Init
    Do While Not EOF(1)
        Get #1, , ByteBuffer
        If Loc(1) < LOF(1) Then
            ByteCounter = ByteCounter + 64
            MD5Transform ByteBuffer
        End If
    Loop
    ByteCounter = ByteCounter + (LOF(1) Mod 64)
    Close #1
    MD5Final
    DigestFileToHexStr = GetValues
End Function
'
' Function to digest a text string and output the result as a string
' of hexadecimal characters.
'
Public Function md5(SourceString As String) As String
    MD5Init
    MD5Update Len(SourceString), StringToArray(SourceString)
    MD5Final
    md5 = GetValues
End Function
'
' A utility function which converts a string into an array of
' bytes.
'
Private Function StringToArray(InString As String) As Byte()
    Dim I As Integer
    Dim bytBuffer() As Byte
    ReDim bytBuffer(Len(InString))
    For I = 0 To Len(InString) - 1
        bytBuffer(I) = Asc(Mid(InString, I + 1, 1))
    Next I
    StringToArray = bytBuffer
End Function
'
' Concatenate the four state vaules into one string
'
Public Function GetValues() As String
    GetValues = LongToString(State(1)) & LongToString(State(2)) & LongToString(State(3)) & LongToString(State(4))
End Function
'
' Convert a Long to a Hex string
'
Private Function LongToString(Num As Long) As String
        Dim a As Byte
        Dim b As Byte
        Dim c As Byte
        Dim d As Byte

        a = Num And &HFF&
        If a < 16 Then
            LongToString = "0" & Hex(a)
        Else
            LongToString = Hex(a)
        End If

        b = (Num And &HFF00&) \ 256
        If b < 16 Then
            LongToString = LongToString & "0" & Hex(b)
        Else
            LongToString = LongToString & Hex(b)
        End If

        c = (Num And &HFF0000) \ 65536
        If c < 16 Then
            LongToString = LongToString & "0" & Hex(c)
        Else
            LongToString = LongToString & Hex(c)
        End If

        If Num < 0 Then
            d = ((Num And &H7F000000) \ 16777216) Or &H80&
        Else
            d = (Num And &HFF000000) \ 16777216
        End If

        If d < 16 Then
            LongToString = LongToString & "0" & Hex(d)
        Else
            LongToString = LongToString & Hex(d)
        End If

End Function
'
' Initialize the class
'   This must be called before a digest calculation is started
'
Public Sub MD5Init()
    ByteCounter = 0
    State(1) = UnsignedToLong(1732584193#)
    State(2) = UnsignedToLong(4023233417#)
    State(3) = UnsignedToLong(2562383102#)
    State(4) = UnsignedToLong(271733878#)
End Sub
'
' MD5 Final
'
Public Sub MD5Final()
    Dim dblBits As Double

    Dim padding(72) As Byte
    Dim lngBytesBuffered As Long

    padding(0) = &H80

    dblBits = ByteCounter * 8

    ' Pad out
    lngBytesBuffered = ByteCounter Mod 64
    If lngBytesBuffered <= 56 Then
        MD5Update 56 - lngBytesBuffered, padding
    Else
        MD5Update 120 - ByteCounter, padding
    End If


    padding(0) = UnsignedToLong(dblBits) And &HFF&
    padding(1) = UnsignedToLong(dblBits) \ 256 And &HFF&
    padding(2) = UnsignedToLong(dblBits) \ 65536 And &HFF&
    padding(3) = UnsignedToLong(dblBits) \ 16777216 And &HFF&
    padding(4) = 0
    padding(5) = 0
    padding(6) = 0
    padding(7) = 0

    MD5Update 8, padding
End Sub
'
' Break up input stream into 64 byte chunks
'
Public Sub MD5Update(InputLen As Long, InputBuffer() As Byte)
    Dim II As Integer
    Dim I As Integer
    Dim J As Integer
    Dim K As Integer
    Dim lngBufferedBytes As Long
    Dim lngBufferRemaining As Long
    Dim lngRem As Long

    lngBufferedBytes = ByteCounter Mod 64
    lngBufferRemaining = 64 - lngBufferedBytes
    ByteCounter = ByteCounter + InputLen
    ' Use up old buffer results first
    If InputLen >= lngBufferRemaining Then
        For II = 0 To lngBufferRemaining - 1
            ByteBuffer(lngBufferedBytes + II) = InputBuffer(II)
        Next II
        MD5Transform ByteBuffer

        lngRem = (InputLen) Mod 64
        ' The transfer is a multiple of 64 lets do some transformations
        For I = lngBufferRemaining To InputLen - II - lngRem Step 64
            For J = 0 To 63
                ByteBuffer(J) = InputBuffer(I + J)
            Next J
            MD5Transform ByteBuffer
        Next I
        lngBufferedBytes = 0
    Else
      I = 0
    End If

    ' Buffer any remaining input
    For K = 0 To InputLen - I - 1
        ByteBuffer(lngBufferedBytes + K) = InputBuffer(I + K)
    Next K

End Sub
'
' MD5 Transform
'
Private Sub MD5Transform(Buffer() As Byte)
    Dim x(16) As Long
    Dim a As Long
    Dim b As Long
    Dim c As Long
    Dim d As Long

    a = State(1)
    b = State(2)
    c = State(3)
    d = State(4)

    Decode 64, x, Buffer
    ' Round 1
    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

    ' Round 2
    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

    ' Round 3
    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

    ' Round 4
    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)
' /* Zeroize sensitive information.
'*/
' MD5_memset ((POINTER)x, 0, sizeof (x));

End Sub
Private Sub Decode(Length As Integer, OutputBuffer() As Long, InputBuffer() As Byte)
    Dim intDblIndex As Integer
    Dim intByteIndex As Integer
    Dim dblSum As Double

    intDblIndex = 0
    For intByteIndex = 0 To Length - 1 Step 4
        dblSum = InputBuffer(intByteIndex) + _
                                    InputBuffer(intByteIndex + 1) * 256# + _
                                    InputBuffer(intByteIndex + 2) * 65536# + _
                                    InputBuffer(intByteIndex + 3) * 16777216#
        OutputBuffer(intDblIndex) = UnsignedToLong(dblSum)
        intDblIndex = intDblIndex + 1
    Next intByteIndex
End Sub

'
' FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
' Rotation is separate from addition to prevent recomputation.
'
Private Function FF(a As Long, _
                    b As Long, _
                    c As Long, _
                    d As Long, _
                    x As Long, _
                    s As Long, _
                    ac As Long) As Long
    a = LongOverflowAdd4(a, (b And c) Or (Not (b) And d), x, ac)
    a = LongLeftRotate(a, s)
    a = LongOverflowAdd(a, b)
End Function
Private Function GG(a As Long, _
                    b As Long, _
                    c As Long, _
                    d As Long, _
                    x As Long, _
                    s As Long, _
                    ac As Long) As Long
    a = LongOverflowAdd4(a, (b And d) Or (c And Not (d)), x, ac)
    a = LongLeftRotate(a, s)
    a = LongOverflowAdd(a, b)
End Function
Private Function HH(a As Long, _
                    b As Long, _
                    c As Long, _
                    d As Long, _
                    x As Long, _
                    s As Long, _
                    ac As Long) As Long
    a = LongOverflowAdd4(a, b Xor c Xor d, x, ac)
    a = LongLeftRotate(a, s)
    a = LongOverflowAdd(a, b)
End Function
Private Function II(a As Long, _
                    b As Long, _
                    c As Long, _
                    d As Long, _
                    x As Long, _
                    s As Long, _
                    ac As Long) As Long
    a = LongOverflowAdd4(a, c Xor (b Or Not (d)), x, ac)
    a = LongLeftRotate(a, s)
    a = LongOverflowAdd(a, b)
End Function
'
' Rotate a long to the right
'
Function LongLeftRotate(value As Long, bits As Long) As Long
    Dim lngSign As Long
    Dim lngI As Long
    bits = bits Mod 32
    If bits = 0 Then LongLeftRotate = value: Exit Function
    For lngI = 1 To bits
        lngSign = value And &HC0000000
        value = (value And &H3FFFFFFF) * 2
        value = value Or ((lngSign < 0) And 1) Or (CBool(lngSign And _
                &H40000000) And &H80000000)
    Next
    LongLeftRotate = value
End Function
'
' Function to add two unsigned numbers together as in C.
' Overflows are ignored!
'
Private Function LongOverflowAdd(Val1 As Long, Val2 As Long) As Long
    Dim lngHighWord As Long
    Dim lngLowWord As Long
    Dim lngOverflow As Long
    lngLowWord = (Val1 And &HFFFF&) + (Val2 And &HFFFF&)
    lngOverflow = lngLowWord \ 65536
    lngHighWord = (((Val1 And &HFFFF0000) \ 65536) + ((Val2 And &HFFFF0000) \ 65536) + lngOverflow) And &HFFFF&
    LongOverflowAdd = UnsignedToLong((lngHighWord * 65536#) + (lngLowWord And &HFFFF&))
End Function
'
' Function to add two unsigned numbers together as in C.
' Overflows are ignored!
'
Private Function LongOverflowAdd4(Val1 As Long, Val2 As Long, val3 As Long, val4 As Long) As Long
    Dim lngHighWord As Long
    Dim lngLowWord As Long
    Dim lngOverflow As Long
    lngLowWord = (Val1 And &HFFFF&) + (Val2 And &HFFFF&) + (val3 And &HFFFF&) + (val4 And &HFFFF&)
    lngOverflow = lngLowWord \ 65536
    lngHighWord = (((Val1 And &HFFFF0000) \ 65536) + _
                   ((Val2 And &HFFFF0000) \ 65536) + _
                   ((val3 And &HFFFF0000) \ 65536) + _
                   ((val4 And &HFFFF0000) \ 65536) + _
                   lngOverflow) And &HFFFF&
    LongOverflowAdd4 = UnsignedToLong((lngHighWord * 65536#) + (lngLowWord And &HFFFF&))
End Function
'
' Convert an unsigned double into a long
'
Private Function UnsignedToLong(value As Double) As Long
        If value < 0 Or value >= OFFSET_4 Then Error 6 ' Overflow
        If value <= MAXINT_4 Then
          UnsignedToLong = value
        Else
          UnsignedToLong = value - OFFSET_4
        End If
      End Function
'
' Convert a long to an unsigned Double
'
Private Function LongToUnsigned(value As Long) As Double
        If value < 0 Then
          LongToUnsigned = value + OFFSET_4
        Else
          LongToUnsigned = value
        End If
End Function[/code]

MD5确实为“不可逆算法”，
基本上可以认定“别人的”算法不是直接计算MD5了。
楼主想“仿制算法”几乎不可能了。这儿我顺便说一下的是，
楼主的MD5算法代码是在哪Copy的啊，
代码有问题吧？
你百度一下，有在线MD5工具，
你的算出来的结果跟它们一致吗？
最直接的，百度百科中介绍MD5算法，
后面有一些“标准结果”，
你的代码计算出来的是否正确？
我曾发布过一个MD5算法的贴子，
建议楼主看看。
我的那个，可以说是“经得起考验”的。
现在知道的问题是，计算文件MD5那个函数，只能用于2G以内的文件。

调试易

求教这种是不是MD5编码,怎么编码和解码?2E3FAB4467222D89B8D0ACD979B66F9B

解决方案 »