Xbase++

URL Signing for Google Maps API

See more Encryption Examples

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

LOCAL oCrypt
LOCAL cSig

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

oCrypt := CreateObject("Chilkat.Crypt2")

//  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.
oCrypt:EncodingMode := "modBase64"

//  Set the hash algorithm to sha-1
oCrypt:HashAlgorithm := "sha-1"
oCrypt:MacAlgorithm := "hmac"

//  Set the HMAC key (this is the private key provided by Google)
oCrypt:SetMacKeyEncoded("vNIXE0xscrmjlyV-12Nj_BvUPaw=", "modBase64")

//  Compute the URL signature
cSig := oCrypt:MacStringENC("/maps/api/geocode/json?address=New+York&sensor=false&client=clientID")

//  The result should be KrU1TzVQM7Ur0i8i7K3huiw3MsA=
? cSig

oCrypt:destroy()