(Go) ITIDA Canonicalize JSON and Compute SHA256 Hash
Demonstrates creating the canonical (ITIDA) version of a JSON document, and then computes the SHA256 hash of the canonicalized JSON. For more information, see https://sdk.invoicing.eta.gov.eg/signature-creation/
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// Load the JSON containing the document to be signed.
// The JSON file should look like this:
// NOTE: The JSON should NOT begin with "{ "documents" : [ ..."
// {
// "issuer":{
// "address":{
// "branchID":"0",
// "country":"EG",
// "regionCity":"Cairo",
// "postalCode":"",
// "buildingNumber":"0",
// "street":"123rd Street",
// "governate":"GOVERNATE"
// },
// "type":"B",
// "id":"209999899",
// "name":"Xyz SAE"
// },
// ...
// ...
sb := chilkat.NewStringBuilder()
success := sb.LoadFile("my_invoice.json","utf-8")
if success == false {
fmt.Println("Failed to load input file.")
sb.DisposeStringBuilder()
return
}
// Convert the contents of sb to the ITIDA canonical form.
// Always pass utf-8 for the 2nd arg.
sb.Encode("itida","utf-8")
// Examine the canonicalized JSON
fmt.Println(*sb.GetAsString())
// Compute the SHA256 hash and show the SHA256 in hex format
fmt.Println("SHA256 hash: ", *sb.GetHash("sha256","hex","utf-8"))
sb.DisposeStringBuilder()
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