Function MD5F(ByVal tempstr As String,ByVal w As String,ByVal X As String,ByVal y As String,ByVal z As String,ByVal Xin As String,ByVal qdata As String,ByVal rots As Integer)
MD5F = BigMod32Add(RotLeft(BigMod32Add(BigMod32Add(w,tempstr),BigMod32Add(Xin,qdata)),rots),X)
End Function
Sub MD5F1(ByRef w As String,ByVal rots As Integer)
Dim tempstr As String
tempstr = BigOR(BigAND(X,y),BigAND(BigNOT(X),z))
w = MD5F(tempstr,w,X,y,z,Xin,qdata,rots)
End Sub
Sub MD5F2(ByRef w As String,ByVal rots As Integer)
Dim tempstr As String
tempstr = BigOR(BigAND(X,z),BigAND(y,BigNOT(z)))
'tempstr = BigXOR(y,BigAND(z,BigXOR(X,y)))
w = MD5F(tempstr,rots)
End Sub
Sub MD5F3(ByRef w As String,ByVal rots As Integer)
Dim tempstr As String
tempstr = BigXOR(BigXOR(X,z)
'tempstr = BigXOR(X,BigXOR(y,rots)
End Sub
Sub MD5F4(ByRef w As String,ByVal rots As Integer)
Dim tempstr As String
tempstr = BigXOR(y,BigOR(X,BigNOT(z)))
w = MD5F(tempstr,rots)
End Sub
Function MD5_Calc(ByVal hashthis As String) As String
Dim buf(4) As String
Dim Xin(16) As String
Dim tempnum As Integer,tempnum2 As Integer,loopit As Integer,loopouter As Integer,loopinner As Integer
Dim a As String,b As String,c As String,d As String,tempstr99 As String
tempnum = 8 * Len(hashthis)
hashthis = hashthis + Chr(128) 'Add binary 10000000
tempnum2 = 56 - Len(hashthis) Mod 64
If tempnum2 < 0 Then
tempnum2 = 64 + tempnum2
End If
'hashthis = hashthis + String(tempnum2,Chr(0))
For loopit = 1 To tempnum2
hashthis = hashthis + Chr(0)
Next loopit
For loopit = 1 To 8
hashthis = hashthis + Chr(tempnum Mod 256)
tempnum = tempnum - tempnum Mod 256
tempnum = tempnum / 256
Next loopit
buf(0) = "67452301"
buf(1) = "efcdab89"
buf(2) = "98badcfe"
buf(3) = "10325476"
For loopouter = 0 To (Len(hashthis) / 64 - 1)
a = buf(0)
b = buf(1)
c = buf(2)
d = buf(3)
' Get the 512 bits
For loopit = 0 To 15
Xin(loopit) = ""
For loopinner = 1 To 4
'tempstr99 = Hex$(Asc(Mid$(hashthis,64 * loopouter + 4 * loopit + loopinner,1)))
'If Len(tempstr99) < 2 Then tempstr99 = "0" + tempstr99
'Xin(loopit) = Xin(loopit) + tempstr99
Xin(loopit) = Hex$(Asc(Mid$(hashthis,1))) + Xin(loopit)
If Len(Xin(loopit)) Mod 2 Then Xin(loopit) = "0" + Xin(loopit)
Next loopinner
Next loopit
' 第一轮循环
MD5F1(a,b,c,d,Xin(0),"d76aa478",7)
MD5F1(d,a,Xin(1),"e8c7b756",12)
MD5F1(c,Xin(2),"242070db",17)
MD5F1(b,Xin(3),"c1bdceee",22)
MD5F1(a,Xin(4),"f57c0faf",Xin(5),"4787c62a",Xin(6),"a8304613",Xin(7),"fd469501",Xin(8),"698098d8",Xin(9),"8b44f7af",Xin(10),"ffff5bb1",Xin(11),"895cd7be",Xin(12),"6b901122",Xin(13),"fd987193",Xin(14),"a679438e",Xin(15),"49b40821",22)
' 第二轮循环
MD5F2(a,"f61e2562",5)
MD5F2(d,"c040b340",9)
MD5F2(c,"265e5a51",14)
MD5F2(b,"e9b6c7aa",20)
MD5F2(a,"d62f105d","02441453","d8a1e681","e7d3fbc8","21e1cde6","c33707d6","f4d50d87","455a14ed","a9e3e905","fcefa3f8","676f02d9","8d2a4c8a",20)
' 第三轮循环
MD5F3(a,"fffa3942",4)
MD5F3(d,"8771f681",11)
MD5F3(c,"6d9d6122",16)
MD5F3(b,"fde5380c",23)
MD5F3(a,"a4beea44","4bdecfa9","f6bb4b60","bebfbc70","289b7ec6","eaa127fa","d4ef3085","04881d05","d9d4d039","e6db99e5","1fa27cf8","c4ac5665",23)
' 第四轮循环
MD5F4(a,"f4292244",6)
MD5F4(d,"432aff97",10)
MD5F4(c,"ab9423a7",15)
MD5F4(b,"fc93a039",21)
MD5F4(a,"655b59c3","8f0ccc92","ffeff47d","85845dd1","6fa87e4f","fe2ce6e0","a3014314","4e0811a1","f7537e82","bd3af235","2ad7d2bb","eb86d391",21)
buf(0) = BigAdd(buf(0),a)
buf(1) = BigAdd(buf(1),b)
buf(2) = BigAdd(buf(2),c)
buf(3) = BigAdd(buf(3),d)
Next loopouter
hashthis = ""
For loopit = 0 To 3
For loopinner = 3 To 0 Step -1
hashthis = hashthis + Mid(buf(loopit),1 + 2 * loopinner,2)
Next loopinner
Next loopit
MD5_Calc = hashthis
End Function
Function BigMod32Add(ByVal value1 As String,ByVal value2 As String) As String
BigMod32Add = Right$(BigAdd(value1,value2),8)
End Function
Public Function BigAdd(ByVal value1 As String,ByVal value2 As String) As String
Dim valueans As String
Dim loopit As Integer,tempnum As Integer
tempnum = Len(value1) - Len(value2)
If tempnum < 0 Then
value1 = Space$(Math.Abs(tempnum)) + value1
ElseIf tempnum > 0 Then
value2 = Space$(Math.Abs(tempnum)) + value2
End If
tempnum = 0
For loopit = Len(value1) To 1 Step -1
tempnum = tempnum + Val("&H" + Mid$(value1,loopit,1)) + Val("&H" + Mid$(value2,1))
valueans = Hex$(tempnum Mod 16) + valueans
tempnum = Int(tempnum / 16)
Next loopit
If tempnum <> 0 Then
valueans = Hex$(tempnum) + valueans
End If
BigAdd = Right(valueans,8)
End Function
Public Function RotLeft(ByVal value1 As String,ByVal rots As Integer) As String
Dim tempstr As String
Dim loopit As Integer,loopinner As Integer
Dim tempnum As Integer
rots = rots Mod 32
If rots = 0 Then
RotLeft = value1
Exit Function
End If
value1 = Right$(value1,8)
'tempstr = String$(8 - Len(value1),"0") + value1
For loopit = 1 To 8 - Len(value1)
tempstr = tempstr + "0"
Next loopit
tempstr = tempstr + value1
value1 = ""
' 转换成二进制形式
For loopit = 1 To 8
tempnum = Val("&H" + Mid$(tempstr,1))
For loopinner = 3 To 0 Step -1
If tempnum And 2 ^ loopinner Then
value1 = value1 + "1"
Else
value1 = value1 + "0"
End If
Next loopinner
Next loopit
tempstr = Mid$(value1,rots + 1) + Left$(value1,rots)
' 转换为十六进制
value1 = ""
For loopit = 0 To 7
tempnum = 0
For loopinner = 0 To 3
If Val(Mid$(tempstr,4 * loopit + loopinner + 1,1)) Then
tempnum = tempnum + 2 ^ (3 - loopinner)
End If
Next loopinner
value1 = value1 + Hex$(tempnum)
Next loopit
RotLeft = Right(value1,8)
End Function
Function BigAND(ByVal value1 As String,tempnum As Integer
tempnum = Len(value1) - Len(value2)
If tempnum < 0 Then
value2 = Mid$(value2,Math.Abs(tempnum) + 1)
ElseIf tempnum > 0 Then
value1 = Mid$(value1,tempnum + 1)
End If
For loopit = 1 To Len(value1)
valueans = valueans + Hex$(Val("&H" + Mid$(value1,1)) And Val("&H" + Mid$(value2,1)))
Next loopit
BigAND = valueans
End Function
Function BigNOT(ByVal value1 As String) As String
Dim valueans As String
Dim loopit As Integer
Dim tempstr As String
value1 = Right$(value1,8)
'value1 = String$(8 - Len(value1),"0") + value1
For loopit = 1 To 8 - Len(value1)
tempstr = tempstr + "0"
Next loopit
tempstr = tempstr + value1
value1 = tempstr
For loopit = 1 To 8
valueans = valueans + Hex$(15 Xor Val("&H" + Mid$(value1,1)))
Next loopit
BigNOT = valueans
End Function
Function BigOR(ByVal value1 As String,tempnum As Integer
tempnum = Len(value1) - Len(value2)
If tempnum < 0 Then
valueans = Left$(value2,Math.Abs(tempnum))
value2 = Mid$(value2,Math.Abs(tempnum) + 1)
ElseIf tempnum > 0 Then
valueans = Left$(value1,Math.Abs(tempnum))
value1 = Mid$(value1,1)) Or Val("&H" + Mid$(value2,1)))
Next loopit
BigOR = valueans
End Function
Function BigXOR(ByVal value1 As String,1)) Xor Val("&H" + Mid$(value2,1)))
Next loopit
BigXOR = Right(valueans,8)
End Function
使用MD5_CALC(STRING)函数来取得该STRING的MD5码