79 lines
2.1 KiB
Plaintext
79 lines
2.1 KiB
Plaintext
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<%
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Response.Buffer = True
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Response.Clear
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Dim Myname, MyPass
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GetUser Myname, MyPass
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Response.Write MyName & "->" & MyPass
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If Len(Myname) = 0 Then
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Response.Status = "401 Unauthorized"
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Response.AddHeader "WWW-Authenticate","BASIC Realm=enter your realm here"
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Response.End
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End If
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Sub GetUser(LOGON_USER, LOGON_PASSWORD)
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Dim UP, Pos, Auth
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Auth = Request.ServerVariables("HTTP_AUTHORIZATION")
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LOGON_USER = ""
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LOGON_PASSWORD = ""
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If LCase(Left(Auth, 5)) = "basic" Then
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UP = Base64Decode(Mid(Auth, 7))
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Pos = InStr(UP, ":")
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If Pos > 1 Then
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LOGON_USER = Left(UP, Pos - 1)
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LOGON_PASSWORD = Mid(UP, Pos + 1)
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End If
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End If
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End Sub
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' Decodes a base-64 encoded string.
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Function Base64Decode(base64String)
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Const Base64CodeBase = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
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Dim dataLength, Out, groupBegin
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dataLength = Len(base64String)
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Out = ""
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If dataLength Mod 4 <> 0 Then
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Err.Raise 1, "Base64Decode", "Bad Base64 string."
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Exit Function
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End If
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' Now decode each group:
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For groupBegin = 1 To dataLength Step 4
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Dim numDataBytes, CharCounter, thisChar, thisData, groupData
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' Each data group encodes up To 3 actual
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' bytes.
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numDataBytes = 3
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groupData = 0
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For CharCounter = 0 To 3
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' <B>Convert</B> each charac
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' ter into 6 bits of data, And add it To
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' an integer For temporary storage. If a
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' character is a '=', there
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' is one fewer data byte. (There can onl
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' y be a maximum of 2 '=' In
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' the whole string.)
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thisChar = Mid(base64String, groupBegin + CharCounter, 1)
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If thisChar = "=" Then
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numDataBytes = numDataBytes - 1
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thisData = 0
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Else
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thisData = InStr(Base64CodeBase, thisChar) - 1
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End If
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If thisData=-1 Then
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Err.Raise 2, "Base64Decode", "Bad character In Base64 string."
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Exit Function
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End If
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groupData = 64 * groupData + thisData
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Next
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' Convert 3-byte integer into up To 3 ch
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' aracters
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Dim OneChar
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For CharCounter = 1 To numDataBytes
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Select Case CharCounter
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Case 1: OneChar = groupData 65536
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Case 2: OneChar = (groupData And 65535) 256
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Case 3: OneChar = (groupData And 255)
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End Select
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Out = Out & Chr(OneChar)
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Next
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Next
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Base64Decode = Out
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End Function
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%>
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