flex4開發實踐在操作過程中會有一個對於開發內容多重加密的環節。大家在查看這個環節的內容的時候只要是能夠注意好按照正確的操作方式以及運用合理的技術來完成flex開發實踐的操作，其實就能夠達到非常輕鬆的操作實踐效果了。現在我們來看看具體的flex開發實踐實現多重加密的操作過程。
RShift = (lValue And &H7FFFFFFE) \ MD5_m_l2Power(iShiftBits)
If (lValue And &H80000000) Then
RShift = (RShift or (&H40000000 \ MD5_m_l2Power(iShiftBits - 1)))
End If
End Function
'字符串偏移轉換，通過左右移位函數實現
Private Function RotateLeft(byVal lValue, byVal iShiftBits)
RotateLeft = LShift(lValue, iShiftBits) or RShift(lValue, (32 - iShiftBits))
End Function
'追加無符號16進制編碼
Private Function AddUnsigned(byVal lX, byVal lY)
Dim lX4
Dim lY4
Dim lX8
Dim lY8
Dim lResult
lX8 = lX And &H80000000
lY8 = lY And &H80000000
lX4 = lX And &H40000000
lY4 = lY And &H40000000
lResult = (lX And &H3FFFFFFF) + (lY And &H3FFFFFFF)
If lX4 And lY4 Then
lResult = lResult Xor &H80000000 Xor lX8 Xor lY8
ElseIf lX4 or lY4 Then
If lResult And &H40000000 Then
lResult = lResult Xor &HC0000000 Xor lX8 Xor lY8
Else
lResult = lResult Xor &H40000000 Xor lX8 Xor lY8
End If
Else
lResult = lResult Xor lX8 Xor lY8
End If
AddUnsigned = lResult
End Function
'MD5_FF,MD5_GG,MD5_HH,MD5_II MD5主編碼函數
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
'MD5_F,MD5_G,MD5_H,MD5_I MD5輔編碼函數
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
'16進制編碼轉換
Private Function WordToHex(byVal lValue)
Dim lByte
Dim lCount
For lCount = 0 To 3
lByte = RShift(lValue, lCount * BITS_TO_A_BYTE) And MD5_m_lOnBits(BITS_TO_A_BYTE - 1)
WordToHex = WordToHex & Right("0" & Hex(lByte), 2)
Next
End Function
flex開發實踐如何實現多重加密操作只要是按照上述的介紹來完成就能夠輕輕鬆鬆的達到自己的預期操作效果了。但是，在操作的時候還是要注意細節的操作問題，字符串以及相關的代碼有遺漏最終就難以實現flex開發實踐如何實現多重加密效果。