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(C) Create ITIDA Signed JSON and Send to ETA (Egypt Tax Authority) Portal

See more Egypt ITIDA Examples

Demonstrates how to create a .p7s signature that fits Egypt's ITIDA requirements where Chilkat automatically does the ITIDA JSON canonicalization. Also shows the code to send to the ETA Portal.

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#include <C_CkGlobal.h>
#include <C_CkCrypt2.h>
#include <C_CkCert.h>
#include <C_CkJsonObject.h>
#include <C_CkStringBuilder.h>
#include <C_CkHttp.h>
#include <C_CkHttpRequest.h>
#include <C_CkHttpResponse.h>

void ChilkatSample(void)
    {
    HCkGlobal glob;
    HCkCrypt2 crypt;
    HCkCert cert;
    BOOL success;
    HCkJsonObject cmsOptions;
    HCkJsonObject jsonSigningAttrs;
    HCkJsonObject json;
    const char *jsonToSign;
    const char *sigBase64;
    HCkStringBuilder sbToSend;
    const char *clientId;
    const char *clientSecretKey;
    HCkHttp http;
    HCkHttpRequest req;
    HCkHttpResponse resp;
    HCkJsonObject jsonToken;
    const char *accessToken;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // Indicate that utf-8 is desired for strings passed in and out of Chilkat.
    glob = CkGlobal_Create();
    CkGlobal_putDefaultUtf8(glob,TRUE);

    crypt = CkCrypt2_Create();
    CkCrypt2_putVerboseLogging(crypt,TRUE);

    cert = CkCert_Create();
    CkCert_putVerboseLogging(cert,TRUE);

    // Set the smart card PIN, which will be needed for signing.
    CkCert_putSmartCardPin(cert,"12345678");

    // There are many ways to load the certificate.  
    // This example was created for a customer using an ePass2003 USB token.
    // Assuming the USB token is the only source of a hardware-based private key..
    success = CkCert_LoadFromSmartcard(cert,"");
    if (success != TRUE) {
        printf("%s\n",CkCert_lastErrorText(cert));
        CkGlobal_Dispose(glob);
        CkCrypt2_Dispose(crypt);
        CkCert_Dispose(cert);
        return;
    }

    // Tell the crypt class to use this cert.
    success = CkCrypt2_SetSigningCert(crypt,cert);
    if (success != TRUE) {
        printf("%s\n",CkCrypt2_lastErrorText(crypt));
        CkGlobal_Dispose(glob);
        CkCrypt2_Dispose(crypt);
        CkCert_Dispose(cert);
        return;
    }

    cmsOptions = CkJsonObject_Create();
    // Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used.
    CkJsonObject_UpdateBool(cmsOptions,"DigestData",TRUE);
    CkJsonObject_UpdateBool(cmsOptions,"OmitAlgorithmIdNull",TRUE);

    // Indicate that we are passing normal JSON and we want Chilkat do automatically
    // do the ITIDA JSON canonicalization:
    CkJsonObject_UpdateBool(cmsOptions,"CanonicalizeITIDA",TRUE);

    CkCrypt2_putCmsOptions(crypt,CkJsonObject_emit(cmsOptions));

    // The CadesEnabled property applies to all methods that create CMS/PKCS7 signatures. 
    // To create a CAdES-BES signature, set this property equal to true. 
    CkCrypt2_putCadesEnabled(crypt,TRUE);

    CkCrypt2_putHashAlgorithm(crypt,"sha256");

    jsonSigningAttrs = CkJsonObject_Create();
    CkJsonObject_UpdateInt(jsonSigningAttrs,"contentType",1);
    CkJsonObject_UpdateInt(jsonSigningAttrs,"signingTime",1);
    CkJsonObject_UpdateInt(jsonSigningAttrs,"messageDigest",1);
    CkJsonObject_UpdateInt(jsonSigningAttrs,"signingCertificateV2",1);
    CkCrypt2_putSigningAttributes(crypt,CkJsonObject_emit(jsonSigningAttrs));

    // By default, all the certs in the chain of authentication are included in the signature.
    // If desired, we can choose to only include the signing certificate:
    CkCrypt2_putIncludeCertChain(crypt,FALSE);

    // Pass a JSON document such as the following.  Chilkat will do the ITIDA canonicalization.
    // (It is the canonicalized JSON that gets signed.)

    //       {
    //          "issuer":{
    //             "address":{
    //                "branchID":"0",
    //                "country":"EG",
    //                "regionCity":"Cairo",
    //                "postalCode":"",
    //                "buildingNumber":"0",
    //                "street":"123rd Street",
    //                "governate":"GOVERNATE"
    //             },
    //             "type":"B",
    //             "id":"209999899",
    //             "name":"Xyz SAE"
    //          },
    //          "receiver":{
    //             "address":{
    //                "country":"EG",
    //                "regionCity":"CAIRO",
    //                "postalCode":"11435",
    //                "buildingNumber":"0",
    //                "street":"Autostrad Road Abc",
    //                "governate":"GOVERNATE"
    //             },
    //             "type":"B",
    //             "id":"999999999",
    //             "name":"XYZ EGYPT FOR TRADE"
    //          },
    //          "documentType":"I",
    //          "documentTypeVersion":"1.0",
    //          "dateTimeIssued":"2020-11-15T11:04:53Z",
    //          "taxpayerActivityCode":"1073",
    //          "internalID":"ZZZZ999",
    //          "purchaseOrderReference":"2009199918",
    //          "salesOrderReference":"",
    //          "payment":{
    //             "bankName":"",
    //             "bankAddress":"",
    //             "bankAccountNo":"",
    //             "bankAccountIBAN":"",
    //             "swiftCode":"",
    //             "terms":""
    //          },
    //          "delivery":{
    //             "approach":"",
    //             "packaging":"",
    //             "dateValidity":"",
    //             "exportPort":"",
    //             "countryOfOrigin":"EG",
    //             "grossWeight":0,
    //             "netWeight":0,
    //             "terms":""
    //          },
    //          "invoiceLines":[
    //             {
    //                "description":"CDM Widget 48GX99X12BA",
    //                "itemType":"GS1",
    //                "itemCode":"7622213335056",
    //                "unitType":"CS",
    //                "quantity":1.00,
    //                "unitValue":{
    //                   "currencySold":"EGP",
    //                   "amountEGP":588.67,
    //                   "amountSold":0,
    //                   "currencyExchangeRate":0
    //                },
    //                "salesTotal":588.67,
    //                "total":603.97,
    //                "valueDifference":0,
    //                "totalTaxableFees":0,
    //                "netTotal":529.8,
    //                "itemsDiscount":0,
    //                "discount":{
    //                   "rate":10.00,
    //                   "amount":58.87
    //                },
    //                "taxableItems":[
    //                   {
    //                      "taxType":"T1",
    //                      "amount":74.17,
    //                      "subType":"No sub",
    //                      "rate":14.00
    //                   }
    //                ],
    //                "internalCode":"9099994"
    //             }
    //          ],
    //          "totalSales":588.67,
    //          "totalSalesAmount":588.67,
    //          "totalDiscountAmount":58.87,
    //          "netAmount":529.80,
    //          "taxTotals":[
    //             {
    //                "taxType":"T1",
    //                "amount":74.17
    //             }
    //          ],
    //          "extraDiscountAmount":0,
    //          "totalItemsDiscountAmount":0,
    //          "totalAmount":603.97,
    //       }

    // Build the above JSON..

    // Use this online tool to generate code from sample JSON: 
    // Generate Code to Create JSON

    json = CkJsonObject_Create();
    CkJsonObject_UpdateString(json,"issuer.address.branchID","0");
    CkJsonObject_UpdateString(json,"issuer.address.country","EG");
    CkJsonObject_UpdateString(json,"issuer.address.regionCity","Cairo");
    CkJsonObject_UpdateString(json,"issuer.address.postalCode","");
    CkJsonObject_UpdateString(json,"issuer.address.buildingNumber","0");
    CkJsonObject_UpdateString(json,"issuer.address.street","123rd Street");
    CkJsonObject_UpdateString(json,"issuer.address.governate","GOVERNATE");
    CkJsonObject_UpdateString(json,"issuer.type","B");
    CkJsonObject_UpdateString(json,"issuer.id","209999899");
    CkJsonObject_UpdateString(json,"issuer.name","Xyz SAE");
    CkJsonObject_UpdateString(json,"receiver.address.country","EG");
    CkJsonObject_UpdateString(json,"receiver.address.regionCity","CAIRO");
    CkJsonObject_UpdateString(json,"receiver.address.postalCode","11435");
    CkJsonObject_UpdateString(json,"receiver.address.buildingNumber","0");
    CkJsonObject_UpdateString(json,"receiver.address.street","Autostrad Road Abc");
    CkJsonObject_UpdateString(json,"receiver.address.governate","GOVERNATE");
    CkJsonObject_UpdateString(json,"receiver.type","B");
    CkJsonObject_UpdateString(json,"receiver.id","999999999");
    CkJsonObject_UpdateString(json,"receiver.name","XYZ EGYPT FOR TRADE");
    CkJsonObject_UpdateString(json,"documentType","I");
    CkJsonObject_UpdateString(json,"documentTypeVersion","1.0");
    CkJsonObject_UpdateString(json,"dateTimeIssued","2020-11-15T11:04:53Z");
    CkJsonObject_UpdateString(json,"taxpayerActivityCode","1073");
    CkJsonObject_UpdateString(json,"internalID","ZZZZ999");
    CkJsonObject_UpdateString(json,"purchaseOrderReference","2009199918");
    CkJsonObject_UpdateString(json,"salesOrderReference","");
    CkJsonObject_UpdateString(json,"payment.bankName","");
    CkJsonObject_UpdateString(json,"payment.bankAddress","");
    CkJsonObject_UpdateString(json,"payment.bankAccountNo","");
    CkJsonObject_UpdateString(json,"payment.bankAccountIBAN","");
    CkJsonObject_UpdateString(json,"payment.swiftCode","");
    CkJsonObject_UpdateString(json,"payment.terms","");
    CkJsonObject_UpdateString(json,"delivery.approach","");
    CkJsonObject_UpdateString(json,"delivery.packaging","");
    CkJsonObject_UpdateString(json,"delivery.dateValidity","");
    CkJsonObject_UpdateString(json,"delivery.exportPort","");
    CkJsonObject_UpdateString(json,"delivery.countryOfOrigin","EG");
    CkJsonObject_UpdateInt(json,"delivery.grossWeight",0);
    CkJsonObject_UpdateInt(json,"delivery.netWeight",0);
    CkJsonObject_UpdateString(json,"delivery.terms","");
    CkJsonObject_UpdateString(json,"invoiceLines[0].description","CDM Widget 48GX99X12BA");
    CkJsonObject_UpdateString(json,"invoiceLines[0].itemType","GS1");
    CkJsonObject_UpdateString(json,"invoiceLines[0].itemCode","7622213335056");
    CkJsonObject_UpdateString(json,"invoiceLines[0].unitType","CS");
    CkJsonObject_UpdateNumber(json,"invoiceLines[0].quantity","1.00");
    CkJsonObject_UpdateString(json,"invoiceLines[0].unitValue.currencySold","EGP");
    CkJsonObject_UpdateNumber(json,"invoiceLines[0].unitValue.amountEGP","588.67");
    CkJsonObject_UpdateInt(json,"invoiceLines[0].unitValue.amountSold",0);
    CkJsonObject_UpdateInt(json,"invoiceLines[0].unitValue.currencyExchangeRate",0);
    CkJsonObject_UpdateNumber(json,"invoiceLines[0].salesTotal","588.67");
    CkJsonObject_UpdateNumber(json,"invoiceLines[0].total","603.97");
    CkJsonObject_UpdateInt(json,"invoiceLines[0].valueDifference",0);
    CkJsonObject_UpdateInt(json,"invoiceLines[0].totalTaxableFees",0);
    CkJsonObject_UpdateNumber(json,"invoiceLines[0].netTotal","529.8");
    CkJsonObject_UpdateInt(json,"invoiceLines[0].itemsDiscount",0);
    CkJsonObject_UpdateNumber(json,"invoiceLines[0].discount.rate","10.00");
    CkJsonObject_UpdateNumber(json,"invoiceLines[0].discount.amount","58.87");
    CkJsonObject_UpdateString(json,"invoiceLines[0].taxableItems[0].taxType","T1");
    CkJsonObject_UpdateNumber(json,"invoiceLines[0].taxableItems[0].amount","74.17");
    CkJsonObject_UpdateString(json,"invoiceLines[0].taxableItems[0].subType","No sub");
    CkJsonObject_UpdateNumber(json,"invoiceLines[0].taxableItems[0].rate","14.00");
    CkJsonObject_UpdateString(json,"invoiceLines[0].internalCode","9099994");
    CkJsonObject_UpdateNumber(json,"totalSales","588.67");
    CkJsonObject_UpdateNumber(json,"totalSalesAmount","588.67");
    CkJsonObject_UpdateNumber(json,"totalDiscountAmount","58.87");
    CkJsonObject_UpdateNumber(json,"netAmount","529.80");
    CkJsonObject_UpdateString(json,"taxTotals[0].taxType","T1");
    CkJsonObject_UpdateNumber(json,"taxTotals[0].amount","74.17");
    CkJsonObject_UpdateInt(json,"extraDiscountAmount",0);
    CkJsonObject_UpdateInt(json,"totalItemsDiscountAmount",0);
    CkJsonObject_UpdateNumber(json,"totalAmount","603.97");

    CkJsonObject_putEmitCompact(json,TRUE);
    jsonToSign = CkJsonObject_emit(json);

    // Create the CAdES-BES signature.
    CkCrypt2_putEncodingMode(crypt,"base64");

    // Make sure we sign the utf-8 byte representation of the JSON string
    CkCrypt2_putCharset(crypt,"utf-8");

    sigBase64 = CkCrypt2_signStringENC(crypt,jsonToSign);
    if (CkCrypt2_getLastMethodSuccess(crypt) == FALSE) {
        printf("%s\n",CkCrypt2_lastErrorText(crypt));
        CkGlobal_Dispose(glob);
        CkCrypt2_Dispose(crypt);
        CkCert_Dispose(cert);
        CkJsonObject_Dispose(cmsOptions);
        CkJsonObject_Dispose(jsonSigningAttrs);
        CkJsonObject_Dispose(json);
        return;
    }

    printf("Base64 signature:\n");
    printf("%s\n",sigBase64);

    // Insert the base64 signature into the JSON to be sent
    CkJsonObject_UpdateString(json,"signatures[0].signatureType","I");
    CkJsonObject_UpdateString(json,"signatures[0].value",sigBase64);

    // Wrap the JSON in  {"documents":[ ... ]}
    sbToSend = CkStringBuilder_Create();
    CkStringBuilder_Append(sbToSend,"{\"documents\":[");
    CkStringBuilder_Append(sbToSend,CkJsonObject_emit(json));
    CkStringBuilder_Append(sbToSend,"]}");

    // ------------------------------------------------------------------------
    // Get an access token using our client ID and client secret key
    clientId = "abc999ff-1234";
    clientSecretKey = "123fff22-1234-abcd";

    http = CkHttp_Create();

    // Causes the Authorization: Basic header to be added..
    CkHttp_putLogin(http,clientId);
    CkHttp_putPassword(http,clientSecretKey);
    CkHttp_putBasicAuth(http,TRUE);

    req = CkHttpRequest_Create();
    CkHttpRequest_putHttpVerb(req,"POST");
    CkHttpRequest_putPath(req,"/connect/token");
    CkHttpRequest_putContentType(req,"application/x-www-form-urlencoded");
    CkHttpRequest_AddParam(req,"grant_type","client_credentials");
    CkHttpRequest_AddHeader(req,"Connection","close");

    CkHttp_putAccept(http,"application/json");

    resp = CkHttp_PostUrlEncoded(http,"https://id.preprod.eta.gov.eg/connect/token",req);
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkGlobal_Dispose(glob);
        CkCrypt2_Dispose(crypt);
        CkCert_Dispose(cert);
        CkJsonObject_Dispose(cmsOptions);
        CkJsonObject_Dispose(jsonSigningAttrs);
        CkJsonObject_Dispose(json);
        CkStringBuilder_Dispose(sbToSend);
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        return;
    }

    CkHttp_CloseAllConnections(http);

    printf("Response status code: %d\n",CkHttpResponse_getStatusCode(resp));
    printf("Response body:\n");
    printf("%s\n",CkHttpResponse_bodyStr(resp));

    if (CkHttpResponse_getStatusCode(resp) != 200) {
        printf("Failed.\n");
        CkHttpResponse_Dispose(resp);
        CkGlobal_Dispose(glob);
        CkCrypt2_Dispose(crypt);
        CkCert_Dispose(cert);
        CkJsonObject_Dispose(cmsOptions);
        CkJsonObject_Dispose(jsonSigningAttrs);
        CkJsonObject_Dispose(json);
        CkStringBuilder_Dispose(sbToSend);
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        return;
    }

    jsonToken = CkJsonObject_Create();
    success = CkJsonObject_Load(jsonToken,CkHttpResponse_bodyStr(resp));

    accessToken = CkJsonObject_stringOf(jsonToken,"access_token");
    printf("access_token = %s\n",accessToken);

    CkHttpResponse_Dispose(resp);

    // ------------------------------------------------------------------------
    // Submit the signed JSON to the ETA (Egypt Tax Authority) Portal

    // No longer sending basic authentication...
    CkHttp_putLogin(http,"");
    CkHttp_putPassword(http,"");
    CkHttp_putBasicAuth(http,FALSE);

    // Setting the AuthToken property causes the "Authorization: Bearer <token>" header to be added to each request.
    CkHttp_putAuthToken(http,accessToken);

    resp = CkHttp_PostJson2(http,"https://api.preprod.invoicing.eta.gov.eg/api/v1/documentsubmissions","application/json; charset=utf-8",CkStringBuilder_getAsString(sbToSend));
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkGlobal_Dispose(glob);
        CkCrypt2_Dispose(crypt);
        CkCert_Dispose(cert);
        CkJsonObject_Dispose(cmsOptions);
        CkJsonObject_Dispose(jsonSigningAttrs);
        CkJsonObject_Dispose(json);
        CkStringBuilder_Dispose(sbToSend);
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkJsonObject_Dispose(jsonToken);
        return;
    }

    printf("Response status code: %d\n",CkHttpResponse_getStatusCode(resp));
    printf("Response body:\n");
    printf("%s\n",CkHttpResponse_bodyStr(resp));


    CkGlobal_Dispose(glob);
    CkCrypt2_Dispose(crypt);
    CkCert_Dispose(cert);
    CkJsonObject_Dispose(cmsOptions);
    CkJsonObject_Dispose(jsonSigningAttrs);
    CkJsonObject_Dispose(json);
    CkStringBuilder_Dispose(sbToSend);
    CkHttp_Dispose(http);
    CkHttpRequest_Dispose(req);
    CkJsonObject_Dispose(jsonToken);

    }

 

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