(Visual Basic 6.0) URL Signing for Google Maps API
Demonstrates how to sign a URL for the Google Maps API.
' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.
Dim crypt As New ChilkatCrypt2
' The output will be modified Base64.
' Modified Base64 for URLs replaces the '+' and '/' characters
' of standard Base64 with '-' and '_' respectively, so that these
' Base64 signatures no longer need to be URL-encoded.
crypt.EncodingMode = "modBase64"
' Set the hash algorithm to sha-1
crypt.HashAlgorithm = "sha-1"
crypt.MacAlgorithm = "hmac"
Dim sig As String
' Set the HMAC key (this is the private key provided by Google)
success = crypt.SetMacKeyEncoded("vNIXE0xscrmjlyV-12Nj_BvUPaw=","modBase64")
' Compute the URL signature
sig = crypt.MacStringENC("/maps/api/geocode/json?address=New+York&sensor=false&client=clientID")
' The result should be KrU1TzVQM7Ur0i8i7K3huiw3MsA=
Debug.Print sig
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