QQ登陆源码......

这个模块除了MD5加密部分是网上找来的，其余部分都是本人独立完成
'其实也很简单，就是MD5+BASE64，要问16还是32的MD5，其实是32的，只不过加密后的
'32位长的字符串要把他看成另一个字符串的HEX，然后将那个字符串用BASE64编码下
'关键是VB里那个字符串会显示为"???"，就是乱码
'--------------这是模块1的-------MD5加密-------------------------------------------------------------------------
Private m_lOnBits(30)
Private m_l2Power(30)
Private Const BITS_TO_A_BYTE = 8
Private Const BYTES_TO_A_WORD = 4
Private Const BITS_TO_A_WORD = 32
Function Hex2Bin(HexStr1 As String)

Select Case UCase(HexStr1)
'16进制转换二进制
Case "0"
q1 = "0000"
Case "1"
q1 = "0001"
Case "2"
q1 = "0010"
Case "3"
q1 = "0011"
Case "4"
q1 = "0100"
Case "5"
q1 = "0101"
Case "6"
q1 = "0110"
Case "7"
q1 = "0111"
Case "8"
q1 = "1000"
Case "9"
q1 = "1001"
Case "A"
q1 = "1010"
Case "B"
q1 = "1011"
Case "C"
q1 = "1100"
Case "D"
q1 = "1101"
Case "E"
q1 = "1110"
Case "F"
q1 = "1111"
End Select
Hex2Bin = q1
End Function
Function Hex2Bin1(HexStr2 As String)
'分断
q1 = Hex2Bin(Mid(HexStr2, 1, 1))
q2 = Hex2Bin(Mid(HexStr2, 2, 1))
q3 = Hex2Bin(Mid(HexStr2, 3, 1))
q4 = Hex2Bin(Mid(HexStr2, 4, 1))
q5 = Hex2Bin(Mid(HexStr2, 5, 1))
q6 = Hex2Bin(Mid(HexStr2, 6, 1))
q7 = Hex2Bin(Mid(HexStr2, 7, 1))
q8 = Hex2Bin(Mid(HexStr2, 8, 1))
q9 = Hex2Bin(Mid(HexStr2, 9, 1))
q10 = Hex2Bin(Mid(HexStr2, 10, 1))
q11 = Hex2Bin(Mid(HexStr2, 11, 1))
q12 = Hex2Bin(Mid(HexStr2, 12, 1))
Hex2Bin1 = q1 & q2 & q3 & q4 & q5 & q6 & q7 & q8 & q9 & q10 & q11 & q12
End Function
Function Bin324(BinCode1 As String)
'填充
q1 = Mid(BinCode1, 1, 6)
q2 = Mid(BinCode1, 7, 6)
q3 = Mid(BinCode1, 13, 6)
q4 = Mid(BinCode1, 19, 6)
q5 = Mid(BinCode1, 25, 6)
q6 = Mid(BinCode1, 31, 6)
q7 = Mid(BinCode1, 37, 6)
q8 = Mid(BinCode1, 43, 6)

Bin324 = "00" & q1 & "00" & q2 & "00" & q3 & "00" & q4 & "00" & q5 & "00" & q6 & "00" & q7 & "00" & q8
End Function

Function Bin2Hex(BinCode2 As String)

'二进制转换为16进制（BASE64一部分）
Select Case UCase(BinCode2)

Case "0000"
q1 = "0"
Case "0001"
q1 = "1"
Case "0010"
q1 = "2"
Case "0011"
q1 = "3"
Case "0100"
q1 = "4"
Case "0101"
q1 = "5"
Case "0110"
q1 = "6"
Case "0111"
q1 = "7"
Case "1000"
q1 = "8"
Case "1001"
q1 = "9"
Case "1010"
q1 = "A"
Case "1011"
q1 = "B"
Case "1100"
q1 = "C"
Case "1101"
q1 = "D"
Case "1110"
q1 = "E"
Case "1111"
q1 = "F"
End Select

Bin2Hex = q1

End Function

Function Bin2Hex2(BinCode As String)

q1 = Bin2Hex(Mid(BinCode, 1, 4))
q2 = Bin2Hex(Mid(BinCode, 5, 4))
q3 = Bin2Hex(Mid(BinCode, 9, 4))
q4 = Bin2Hex(Mid(BinCode, 13, 4))

Bin2Hex2 = q1 & q2 & q3 & q4
End Function

Function Bin2Hex3(BinCode3 As String)

q1 = Bin2Hex2(Mid(BinCode3, 1, 16))
q2 = Bin2Hex2(Mid(BinCode3, 17, 16))
q3 = Bin2Hex2(Mid(BinCode3, 33, 16))
q4 = Bin2Hex2(Mid(BinCode3, 49, 16))

Bin2Hex3 = q1 & q2 & q3 & q4
End Function
Function HexBase64(HexString As String)

HexBase64 = HexBase64_2(Bin2Hex3(Bin324(Hex2Bin1(HexString))))
End Function
Function HexBase64_1(HexString As String)

Select Case HexString

Case "00"
q1 = "A"
Case "01"
q1 = "B"
Case "02"
q1 = "C"
Case "03"
q1 = "D"
Case "04"
q1 = "E"
Case "05"
q1 = "F"
Case "06"
q1 = "G"
Case "07"
q1 = "H"
Case "08"
q1 = "I"
Case "09"
q1 = "J"
Case "0A"
q1 = "K"
Case "0B"
q1 = "L"
Case "0C"
q1 = "M"
Case "0D"
q1 = "N"
Case "0E"
q1 = "O"
Case "0F"
q1 = "P"
Case "10"
q1 = "Q"
Case "11"
q1 = "R"
Case "12"
q1 = "S"
Case "13"
q1 = "T"
Case "14"
q1 = "U"
Case "15"
q1 = "V"
Case "16"
q1 = "W"
Case "17"
q1 = "X"
Case "18"
q1 = "Y"
Case "19"
q1 = "Z"
Case "1A"
q1 = "a"
Case "1B"
q1 = "b"
Case "1C"
q1 = "c"
Case "1D"
q1 = "d"
Case "1E"
q1 = "e"
Case "1F"
q1 = "f"
Case "20"
q1 = "g"
Case "21"
q1 = "h"
Case "22"
q1 = "i"
Case "23"
q1 = "j"
Case "24"
q1 = "k"
Case "25"
q1 = "l"
Case "26"
q1 = "m"
Case "27"
q1 = "n"
Case "28"
q1 = "o"
Case "29"
q1 = "p"
Case "2A"
q1 = "q"
Case "2B"
q1 = "r"
Case "2C"
q1 = "s"
Case "2D"
q1 = "t"
Case "2E"
q1 = "u"
Case "2F"
q1 = "v"

Case "30"
q1 = "w"
Case "31"
q1 = "x"
Case "32"
q1 = "y"
Case "33"
q1 = "z"
Case "34"
q1 = "0"
Case "35"
q1 = "1"
Case "36"
q1 = "2"
Case "37"
q1 = "3"
Case "38"
q1 = "4"
Case "39"
q1 = "5"
Case "3A"
q1 = "6"
Case "3B"
q1 = "7"
Case "3C"
q1 = "8"
Case "3D"
q1 = "9"
Case "3E"
q1 = "+"
Case "3F"
q1 = "/"

End Select
HexBase64_1 = q1
End Function
Function HexBase64_2(HexString As String)
q1 = HexBase64_1(Mid(HexString, 1, 2))
q2 = HexBase64_1(Mid(HexString, 3, 2))
q3 = HexBase64_1(Mid(HexString, 5, 2))
q4 = HexBase64_1(Mid(HexString, 7, 2))
q5 = HexBase64_1(Mid(HexString, 9, 2))
q6 = HexBase64_1(Mid(HexString, 11, 2))
q7 = HexBase64_1(Mid(HexString, 13, 2))
q8 = HexBase64_1(Mid(HexString, 15, 2))
HexBase64_2 = q1 & q2 & q3 & q4 & q5 & q6 & q7 & q8
End Function

Function Hex2Base64(HexCode As String)

For i = 0 To Len(HexCode) Step 12
q1 = q1 & HexBase64(Mid(HexCode, i + 1, 12))

Next
Hex2Base64 = q1
End Function


Private Function md5_F(X, Y, z)
md5_F = (X And Y) Or ((Not X) And z)
End Function

Private Function md5_G(X, Y, z)
md5_G = (X And z) Or (Y And (Not z))
End Function

Private Function md5_H(X, Y, z)
md5_H = (X Xor Y Xor z)
End Function

Private Function md5_I(X, Y, z)
md5_I = (Y Xor (X Or (Not z)))
End Function

Private Sub md5_FF(a, b, c, d, X, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_F(b, c, d), X), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub

Private Sub md5_GG(a, b, c, d, X, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_G(b, c, d), X), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub

Private Sub md5_HH(a, b, c, d, X, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_H(b, c, d), X), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub

Private Sub md5_II(a, b, c, d, X, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_I(b, c, d), X), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub

Private Function ConvertToWordArray(sMessage)
Dim lMessageLength
Dim lNumberOfWords
Dim lWordArray()
Dim lBytePosition
Dim lByteCount
Dim lWordCount

Const MODULUS_BITS = 512
Const CONGRUENT_BITS = 448

lMessageLength = Len(sMessage)

lNumberOfWords = (((lMessageLength + ((MODULUS_BITS - CONGRUENT_BITS) \ BITS_TO_A_BYTE)) \ (MODULUS_BITS \ BITS_TO_A_BYTE)) + 1) * (MODULUS_BITS \ BITS_TO_A_WORD)
ReDim lWordArray(lNumberOfWords - 1)

lBytePosition = 0
lByteCount = 0
Do Until lByteCount >= lMessageLength
lWordCount = lByteCount \ BYTES_TO_A_WORD
lBytePosition = (lByteCount Mod BYTES_TO_A_WORD) * BITS_TO_A_BYTE
lWordArray(lWordCount) = lWordArray(lWordCount) Or LShift(Asc(Mid(sMessage, lByteCount + 1, 1)), lBytePosition)
lByteCount = lByteCount + 1
Loop

lWordCount = lByteCount \ BYTES_TO_A_WORD
lBytePosition = (lByteCount Mod BYTES_TO_A_WORD) * BITS_TO_A_BYTE

lWordArray(lWordCount) = lWordArray(lWordCount) Or LShift(&H80, lBytePosition)

lWordArray(lNumberOfWords - 2) = LShift(lMessageLength, 3)
lWordArray(lNumberOfWords - 1) = RShift(lMessageLength, 29)

ConvertToWordArray = lWordArray
End Function