Base64 to Hex or Hex to Base64 encode and decode

B64HEX.vbs

' Base64 to Hex or Hex to Base64 encode and decode
' Website: http://wangye.org
' Base64转16进制
Function B64ToHex(ByVal strContent)
  Dim i,strReturned, b64pad, _
       b64map, chTemp, intLocate, k , slop
  strReturned = "" : k = 0
  b64map="ABCDEFGHIJKLMNOPQRSTUVWXYZ" &_
              "abcdefghijklmnopqrstuvwxyz0123456789+/"
  b64pad="="
  For i=0 To Len(strContent)-1
     chTemp = Mid(strContent, i+1, 1)
     If chTemp = b64pad Then Exit For
     intLocate = InStr(1, b64map, chTemp, 0)-1
     If intLocate > -1 Then
         Select Case K
           Case 0
           strReturned = strReturned &_
                             Int2Char(Int(intLocate / 4))
           slop = intLocate And 3 :  k = 1
           Case 1
           strReturned = strReturned &_
                              Int2Char( (slop * 4) Or (Int(intLocate / 16)) )
          slop = intLocate And &h0f :  k = 2
          Case 2
          strReturned = strReturned &_
                             Int2Char(slop) & Int2Char(Int(intLocate / 4))
          slop = intLocate And 3  : k=3
          Case Else
          strReturned = strReturned &_
                             Int2Char( (slop * 4) Or (Int(intLocate / 16)) ) &_
                             Int2Char(intLocate And &h0f)
          k = 0
        End Select
     End If
  Next
  If k=1 Then strReturned = strReturned & Int2Char(slop * 4)
  B64ToHex = strReturned
End Function
 
' 16进制转Base64
Function HexToB64(ByVal strContent)
  Dim i, c, strReturned, b64map, b64pad, intLen
  b64map="ABCDEFGHIJKLMNOPQRSTUVWXYZ" &_
             "abcdefghijklmnopqrstuvwxyz0123456789+/"
  b64pad="="
  intLen = Len(strContent)
  For i=0 To intLen-3 Step 3
      c=Clng("&h" & Mid(strContent,i+1,3))
      strReturned = strReturned &_
                         Mid(b64map, Int(c / 64 +1), 1) &_
                         Mid(b64map, (c And 63)+1, 1)
  Next
 
  If i+1=intLen Then
     c =Clng("&h" & Mid(strContent,i+1,1))
     strReturned = strReturned & Mid(b64map, c * 4 + 1, 1)
  ElseIf i+2=intLen Then
     c =Clng("&h" & Mid(strContent,i+1,2))
     strReturned = strReturned & Mid(b64map, Int(c / 4) + 1, 1) &_
                        Mid(b64map, (c And 3)*16+1, 1)		
  End If
 
  While (Len(strReturned) And 3) >0
      strReturned = strReturned & b64pad
  Wend
  HexToB64 = strReturned
End Function