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(DataFlex) ITIDA Debug Signed JSON and HTTP POSTSee more Egypt ITIDA ExamplesExplains how to debug when problems are encountered with ITIDA canonicalization, signing, and posting to api.preprod.invoicing.eta.gov.eg. The most common error response from the api.preprod.invoicing.eta.gov.eg server is: ITIDA Signature Invalid Signature * 4043 4043:message-digest attribute value does not match the calculated value[message-digest attribute value does not match the calculated value]
Use ChilkatAx-win32.pkg Procedure Test Handle hoCrypt Variant vCert Handle hoCert Boolean iSuccess Handle hoCmsOptions Handle hoJsonSigningAttrs Handle hoJson String sJsonToSign String sSigBase64 Handle hoSbToSend Handle hoHttp Variant vResp Handle hoResp String sTemp1 Integer iTemp1 Boolean bTemp1 // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. Get Create (RefClass(cComChilkatCrypt2)) To hoCrypt If (Not(IsComObjectCreated(hoCrypt))) Begin Send CreateComObject of hoCrypt End Set ComVerboseLogging Of hoCrypt To True Get Create (RefClass(cComChilkatCert)) To hoCert If (Not(IsComObjectCreated(hoCert))) Begin Send CreateComObject of hoCert End Set ComVerboseLogging Of hoCert To True // Set the smart card PIN, which will be needed for signing. Set ComSmartCardPin Of hoCert To "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.. Get ComLoadFromSmartcard Of hoCert "" To iSuccess If (iSuccess <> True) Begin Get ComLastErrorText Of hoCert To sTemp1 Showln sTemp1 Procedure_Return End // Tell the crypt class to use this cert. Get pvComObject of hoCert to vCert Get ComSetSigningCert Of hoCrypt vCert To iSuccess If (iSuccess <> True) Begin Get ComLastErrorText Of hoCrypt To sTemp1 Showln sTemp1 Procedure_Return End Get Create (RefClass(cComChilkatJsonObject)) To hoCmsOptions If (Not(IsComObjectCreated(hoCmsOptions))) Begin Send CreateComObject of hoCmsOptions End // Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used. Get ComUpdateBool Of hoCmsOptions "DigestData" True To iSuccess Get ComUpdateBool Of hoCmsOptions "OmitAlgorithmIdNull" True To iSuccess // Indicate that we are passing normal JSON and we want Chilkat do automatically // do the ITIDA JSON canonicalization: Get ComUpdateBool Of hoCmsOptions "CanonicalizeITIDA" True To iSuccess Get ComEmit Of hoCmsOptions To sTemp1 Set ComCmsOptions Of hoCrypt To sTemp1 // The CadesEnabled property applies to all methods that create CMS/PKCS7 signatures. // To create a CAdES-BES signature, set this property equal to true. Set ComCadesEnabled Of hoCrypt To True Set ComHashAlgorithm Of hoCrypt To "sha256" Get Create (RefClass(cComChilkatJsonObject)) To hoJsonSigningAttrs If (Not(IsComObjectCreated(hoJsonSigningAttrs))) Begin Send CreateComObject of hoJsonSigningAttrs End Get ComUpdateInt Of hoJsonSigningAttrs "contentType" 1 To iSuccess Get ComUpdateInt Of hoJsonSigningAttrs "signingTime" 1 To iSuccess Get ComUpdateInt Of hoJsonSigningAttrs "messageDigest" 1 To iSuccess Get ComUpdateInt Of hoJsonSigningAttrs "signingCertificateV2" 1 To iSuccess Get ComEmit Of hoJsonSigningAttrs To sTemp1 Set ComSigningAttributes Of hoCrypt To sTemp1 // 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: Set ComIncludeCertChain Of hoCrypt To False // First, load the JSON file that is to be canonicalized and signed. // The JSON file should look like this: // NOTE: The JSON should not begin with "{ "documents" : [ ..." // We want to send a single signed document like this: // { // "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, // } // // Please include this JSON file as an attachment in your support email to Chilkat. Get Create (RefClass(cComChilkatJsonObject)) To hoJson If (Not(IsComObjectCreated(hoJson))) Begin Send CreateComObject of hoJson End Get ComLoadFile Of hoJson "c:/someDir/jsonToSignAndSend.json" To iSuccess If (iSuccess = False) Begin Showln "Failed to load input JSON file." Procedure_Return End Set ComEmitCompact Of hoJson To True Get ComEmit Of hoJson To sJsonToSign // Create the CAdES-BES signature. Set ComEncodingMode Of hoCrypt To "base64" // Make sure we sign the utf-8 byte representation of the JSON string Set ComCharset Of hoCrypt To "utf-8" // Turn on verbose logging. Set ComVerboseLogging Of hoCrypt To True Get ComSignStringENC Of hoCrypt sJsonToSign To sSigBase64 Get ComLastMethodSuccess Of hoCrypt To bTemp1 If (bTemp1 = False) Begin Get ComLastErrorText Of hoCrypt To sTemp1 Showln sTemp1 Procedure_Return End // The LastErrorText property still contains information when the method succeeds. // Send the contents of this LastErrorText as an attachment in your support email to Chilkat. Get ComLastErrorText Of hoCrypt To sTemp1 Showln sTemp1 // Insert the base64 signature into the JSON to be sent Get ComUpdateString Of hoJson "signatures[0].signatureType" "I" To iSuccess Get ComUpdateString Of hoJson "signatures[0].value" sSigBase64 To iSuccess // Wrap the JSON in {"documents":[ ... ]} Get Create (RefClass(cComChilkatStringBuilder)) To hoSbToSend If (Not(IsComObjectCreated(hoSbToSend))) Begin Send CreateComObject of hoSbToSend End Get ComAppend Of hoSbToSend '{"documents":[' To iSuccess Get ComEmit Of hoJson To sTemp1 Get ComAppend Of hoSbToSend sTemp1 To iSuccess Get ComAppend Of hoSbToSend "]}" To iSuccess // ------------------------------------------------------------------------ // Submit the signed JSON to Chilkat's URL for simply echoing back the contents of the HTTP POST it receives: // // We just want to see what actually gets sent. To do this, we can send to https://www.chilkatsoft.com/echoPostBody.asp // which will echo in the response that data and headers it received. Get Create (RefClass(cComChilkatHttp)) To hoHttp If (Not(IsComObjectCreated(hoHttp))) Begin Send CreateComObject of hoHttp End // Also, set the SessionLogFilename property so we can see the exact bytes of the HTTP request sent from your end. // Please include this session log file as an attachment in your support email to Chilkat. Set ComSessionLogFilename Of hoHttp To "c:/someDir/sessionLog.txt" Get ComGetAsString Of hoSbToSend To sTemp1 Get ComPostJson2 Of hoHttp "https://www.chilkatsoft.com/echoPostBody.asp" "application/json; charset=utf-8" sTemp1 To vResp If (IsComObject(vResp)) Begin Get Create (RefClass(cComChilkatHttpResponse)) To hoResp Set pvComObject Of hoResp To vResp End Get ComLastMethodSuccess Of hoHttp To bTemp1 If (bTemp1 = False) Begin Get ComLastErrorText Of hoHttp To sTemp1 Showln sTemp1 Procedure_Return End // Save the exact contents of Chilkat's response to a file. // The server at https://www.chilkatsoft.com/echoPostBody.asp is simply echoing back the headers and POST body it received. // Please include the responseBody.txt as an attachment in your support email to Chilkat. Get ComSaveBodyBinary Of hoResp "c:/someDir/responseBody.txt" To iSuccess Get ComStatusCode Of hoResp To iTemp1 Showln "Response status code: " iTemp1 Send Destroy of hoResp // ------------------------------------------------- // In summary, please include the following in your support email to Chilkat // 1. The original JSON file before signing and before canonicalization (i.e. c:/someDir/jsonToSignAndSend.json) // 2. The contents of the LastErrorText for the successful call to SignStringENC. // 3. The HTTP session log file (i.e. c:/someDir/sessionLog.txt) // 4. The responseBody.txt file. End_Procedure |
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