(Chilkat2-Python) ITIDA Canonicalize JSON and Compute SHA256 Hash

See more Egypt ITIDA Examples

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/

Chilkat2 Python Downloads install with pip pip3 install chilkat2 or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

# 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 = chilkat2.StringBuilder()
success = sb.LoadFile("my_invoice.json","utf-8")
if (success == False):
    print("Failed to load input file.")
    sys.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
print(sb.GetAsString())

# Compute the SHA256 hash and show the SHA256 in hex format
print("SHA256 hash: " + sb.GetHash("sha256","hex","utf-8"))