Java

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. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.StringBuilder;

public class ChilkatExample {

    public static void main(String[] args) {
        // 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"
        //          },
        // ...
        // ...

        StringBuilder sb = new StringBuilder();
        try {
            sb.loadFile("my_invoice.json", "utf-8");
        } catch (ChilkatException e) {
            System.out.println("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
        System.out.println(sb.getAsString());

        // Compute the SHA256 hash and show the SHA256 in hex format
        System.out.println("SHA256 hash: " + sb.getHash("sha256", "hex", "utf-8"));
    }
}