VB中实现MD5加密

nbsp; 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, _