(PowerShell) 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/
Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"
# 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 = New-Object Chilkat.StringBuilder
$success = $sb.LoadFile("my_invoice.json","utf-8")
if ($success -eq $false) {
$("Failed to load input file.")
exit
}
# 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
$($sb.GetAsString())
# Compute the SHA256 hash and show the SHA256 in hex format
$("SHA256 hash: " + $sb.GetHash("sha256","hex","utf-8"))
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