(PowerBuilder) URL Signing for Google Maps API

Demonstrates how to sign a URL for the Google Maps API.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Crypt
string ls_Sig

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

loo_Crypt = create oleobject
// Use "Chilkat_9_5_0.Crypt2" for versions of Chilkat < 10.0.0
li_rc = loo_Crypt.ConnectToNewObject("Chilkat.Crypt2")
if li_rc < 0 then
    destroy loo_Crypt
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// 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.
loo_Crypt.EncodingMode = "modBase64"

// Set the hash algorithm to sha-1
loo_Crypt.HashAlgorithm = "sha-1"

// Set the HMAC key (this is the private key provided by Google)
loo_Crypt.SetHmacKeyEncoded("vNIXE0xscrmjlyV-12Nj_BvUPaw=","modBase64")

// Compute the URL signature
ls_Sig = loo_Crypt.HmacStringENC("/maps/api/geocode/json?address=New+York&sensor=false&client=clientID")

// The result should be KrU1TzVQM7Ur0i8i7K3huiw3MsA=
Write-Debug ls_Sig


destroy loo_Crypt