C#

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. C#

bool success = false;

//  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"
//           },
//  ...
//  ...

Chilkat.StringBuilder sb = new Chilkat.StringBuilder();
success = sb.LoadFile("my_invoice.json","utf-8");
if (success == false) {
    Debug.WriteLine("Failed to load input file.");
    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
Debug.WriteLine(sb.GetAsString());

//  Compute the SHA256 hash and show the SHA256 in hex format
Debug.WriteLine("SHA256 hash: " + sb.GetHash("sha256","hex","utf-8"));