tout est dans le code ...
Source / Exemple :
Private Const base64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
Public Function base64_encode(DecryptedText As String) As String
Dim c1, c2, c3 As Integer
Dim w1 As Integer
Dim w2 As Integer
Dim w3 As Integer
Dim w4 As Integer
Dim n As Integer
Dim retry As String
For n = 1 To Len(DecryptedText) Step 3
c1 = Asc(Mid$(DecryptedText, n, 1))
c2 = Asc(Mid$(DecryptedText, n + 1, 1) + Chr$(0))
c3 = Asc(Mid$(DecryptedText, n + 2, 1) + Chr$(0))
w1 = Int(c1 / 4)
w2 = (c1 And 3) * 16 + Int(c2 / 16)
If Len(DecryptedText) >= n + 1 Then w3 = (c2 And 15) * 4 + Int(c3 / 64) Else w3 = -1
If Len(DecryptedText) >= n + 2 Then w4 = c3 And 63 Else w4 = -1
retry = retry + mimeencode(w1) + mimeencode(w2) + mimeencode(w3) + mimeencode(w4)
Next
base64_encode = retry
End Function
Public Function base64_decode(a As String) As String
Dim w1 As Integer
Dim w2 As Integer
Dim w3 As Integer
Dim w4 As Integer
Dim n As Integer
Dim retry As String
For n = 1 To Len(a) Step 4
w1 = mimedecode(Mid$(a, n, 1))
w2 = mimedecode(Mid$(a, n + 1, 1))
w3 = mimedecode(Mid$(a, n + 2, 1))
w4 = mimedecode(Mid$(a, n + 3, 1))
If w2 >= 0 Then retry = retry + Chr$(((w1 * 4 + Int(w2 / 16)) And 255))
If w3 >= 0 Then retry = retry + Chr$(((w2 * 16 + Int(w3 / 4)) And 255))
If w4 >= 0 Then retry = retry + Chr$(((w3 * 64 + w4) And 255))
Next
base64_decode = retry
End Function
Private Function mimeencode(w As Integer) As String
If w >= 0 Then mimeencode = Mid$(base64, w + 1, 1) Else mimeencode = ""
End Function
Private Function mimedecode(a As String) As Integer
If Len(a) = 0 Then mimedecode = -1: Exit Function
mimedecode = InStr(base64, a) - 1
End Function
Conclusion :
yoo !
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divers@omnikod.fr.fm
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