(Swift) Hungary NAV Token Exchange

Demonstrates the tokenExchange request for the Hungarian NAV Online Invoicing System REST API v2.0.

Note: This example requires Chilkat v11.0.0 or greater.

For more information, see https://onlineszamla.nav.gov.hu/api/files/container/download/Online%20Szamla_Interfesz%20specifik%C3%A1ci%C3%B3_EN_v2.0.pdf

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func chilkatTest() {
    var success: Bool = false

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

    // Build the following XML:

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

    // <?xml version="1.0" encoding="UTF-8"?>
    // <TokenExchangeRequest xmlns="http://schemas.nav.gov.hu/OSA/2.0/api">
    // 	<header>
    // 		<requestId>RID896801578348</requestId>
    // 		<timestamp>2019-09-11T10:55:31.440Z</timestamp>
    // 		<requestVersion>2.0</requestVersion>
    // 		<headerVersion>1.0</headerVersion>
    // 	</header>
    // 	<user>
    // 		<login>lwilsmn0uqdxe6u</login>
    // 		<passwordHash>2F43840A882CFDB7DB0FEC07D419D030D864B47B6B541DC280EF81B937B7A176E33C052B0D26638CC18A7A2C08D8D311733078A774BF43F6CA57FE8CD74DC28E</passwordHash>
    // 		<taxNumber>11111111</taxNumber>
    // 		<requestSignature>B4B5E0F197BFFD3DF69BCC98D3BE775F65FD5445EEF95C9D6B6C59425F2B81C4F6DA1FD563B0C7E7D98AF1E1725E5C63C2803B5D3A93D1C02ED354AC92F2CC94</requestSignature>
    // 		<!--<signKey>ac-ac3a-7f661bff7d342N43CYX4U9FG</signKey>-->
    // 	</user>
    // 	<software>
    // 		<softwareId>123456789123456789</softwareId>
    // 		<softwareName>string</softwareName>
    // 		<softwareOperation>LOCAL_SOFTWARE</softwareOperation>
    // 		<softwareMainVersion>string</softwareMainVersion>
    // 		<softwareDevName>string</softwareDevName>
    // 		<softwareDevContact>string</softwareDevContact>
    // 		<softwareDevCountryCode>HU</softwareDevCountryCode>
    // 		<softwareDevTaxNumber>string</softwareDevTaxNumber>
    // 	</software>
    // </TokenExchangeRequest>

    let crypt = CkoCrypt2()!

    let dtNow = CkoDateTime()!
    dtNow.setFromCurrentSystemTime()
    print("\(dtNow.get(asTimestamp: false)!)")

    // The hash algorithm for the password is SHA512 (not SHA3-512).
    crypt.hashAlgorithm = "sha512"
    crypt.encodingMode = "hex"
    var myPassword: String? = "my-password"
    var passwordHash: String? = crypt.hashStringENC(str: myPassword)

    // Generate a random request ID like "RID215118906689"
    let prng = CkoPrng()!
    let sbRequestId = CkoStringBuilder()!
    sbRequestId.append(value: "RID")
    sbRequestId.append(value: prng.randomString(length: 12, bDigits: true, bLower: false, bUpper: false))
    print("generated requestId = \(sbRequestId.getAsString()!)")

    // Calculate the requestSignature
    crypt.hashAlgorithm = "sha3-512"
    var signatureKey: String? = "ce-8f5e-215119fa7dd621DLMRHRLH2S"

    let sbFinalHashBase = CkoStringBuilder()!

    // First append the timestamp because we are going to remove certain chars/parts.
    sbFinalHashBase.append(value: dtNow.get(asTimestamp: false))
    var numReplaced: Int = sbFinalHashBase.replace(value: "Z", replacement: "").intValue
    numReplaced = sbFinalHashBase.replace(value: "-", replacement: "").intValue
    numReplaced = sbFinalHashBase.replace(value: ":", replacement: "").intValue
    numReplaced = sbFinalHashBase.replace(value: "T", replacement: "").intValue

    // Prepend the requestId and append the signatureKey
    sbFinalHashBase.prepend(value: sbRequestId.getAsString())
    sbFinalHashBase.append(value: signatureKey)

    var requestSignature: String? = crypt.hashStringENC(str: sbFinalHashBase.getAsString())

    let xml = CkoXml()!
    xml.tag = "TokenExchangeRequest"
    xml.addAttribute(name: "xmlns", value: "http://schemas.nav.gov.hu/OSA/2.0/api")
    xml.updateChildContent(tagPath: "header|requestId", value: sbRequestId.getAsString())
    xml.updateChildContent(tagPath: "header|timestamp", value: dtNow.get(asTimestamp: false))
    xml.updateChildContent(tagPath: "header|requestVersion", value: "2.0")
    xml.updateChildContent(tagPath: "header|headerVersion", value: "1.0")
    xml.updateChildContent(tagPath: "user|login", value: "lwilsmn0uqdxe6u")
    xml.updateChildContent(tagPath: "user|passwordHash", value: passwordHash)
    xml.updateChildContent(tagPath: "user|taxNumber", value: "11111111")
    xml.updateChildContent(tagPath: "user|requestSignature", value: requestSignature)
    xml.updateChildContent(tagPath: "software|softwareId", value: "123456789123456789")
    xml.updateChildContent(tagPath: "software|softwareName", value: "string")
    xml.updateChildContent(tagPath: "software|softwareOperation", value: "LOCAL_SOFTWARE")
    xml.updateChildContent(tagPath: "software|softwareMainVersion", value: "string")
    xml.updateChildContent(tagPath: "software|softwareDevName", value: "string")
    xml.updateChildContent(tagPath: "software|softwareDevContact", value: "string")
    xml.updateChildContent(tagPath: "software|softwareDevCountryCode", value: "HU")
    xml.updateChildContent(tagPath: "software|softwareDevTaxNumber", value: "string")

    // POST the XML to https://api-test.onlineszamla.nav.gov.hu/invoiceService/v2/tokenExchange
    let http = CkoHttp()!
    http.accept = "application/xml"
    var endpoint: String? = "https://api-test.onlineszamla.nav.gov.hu/invoiceService/v2/tokenExchange"
    let resp = CkoHttpResponse()!
    success = http.httpStr(verb: "POST", url: endpoint, bodyStr: xml.getXml(), charset: "utf-8", contentType: "application/xml", response: resp)
    if success == false {
        print("\(http.lastErrorText!)")
        return
    }

    print("Response status code = \(resp.statusCode.intValue)")

    let respXml = CkoXml()!
    respXml.load(xmlData: resp.bodyStr)
    print("Response body:")
    print("\(respXml.getXml()!)")

    // Save our exchange token to a file to be used for subsequent requests.
    respXml.save(path: "qa_data/tokens/nav_exchange_token.xml")

    // The result looks like this:

    // <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
    // <TokenExchangeResponse xmlns="http://schemas.nav.gov.hu/OSA/2.0/api" xmlns:ns2="http://schemas.nav.gov.hu/OSA/2.0/data">
    //     <header>
    //         <requestId>RID789246611489</requestId>
    //         <timestamp>2020-03-25T14:14:36Z</timestamp>
    //         <requestVersion>2.0</requestVersion>
    //         <headerVersion>1.0</headerVersion>
    //     </header>
    //     <result>
    //         <funcCode>OK</funcCode>
    //     </result>
    //     <software>
    //         <softwareId>123456789123456789</softwareId>
    //         <softwareName>string</softwareName>
    //         <softwareOperation>LOCAL_SOFTWARE</softwareOperation>
    //         <softwareMainVersion>string</softwareMainVersion>
    //         <softwareDevName>string</softwareDevName>
    //         <softwareDevContact>string</softwareDevContact>
    //         <softwareDevCountryCode>HU</softwareDevCountryCode>
    //         <softwareDevTaxNumber>string</softwareDevTaxNumber>
    //     </software>
    //     <encodedExchangeToken>2lR5v57Tl ... 9n4tIWCYgjKQ==</encodedExchangeToken>
    //     <tokenValidityFrom>2020-03-25T15:14:36.987+01:00</tokenValidityFrom>
    //     <tokenValidityTo>2020-03-25T15:19:36.987+01:00</tokenValidityTo>
    // </TokenExchangeResponse>

    // Use this online tool to generate parsing code from sample XML: 
    // Generate Parsing Code from XML

    var TokenExchangeResponse_xmlns: String? = respXml.getAttrValue(name: "xmlns")
    var TokenExchangeResponse_xmlns_ns2: String? = respXml.getAttrValue(name: "xmlns:ns2")
    var requestId: String? = respXml.getChildContent(tagPath: "header|requestId")
    var timestamp: String? = respXml.getChildContent(tagPath: "header|timestamp")
    var requestVersion: String? = respXml.getChildContent(tagPath: "header|requestVersion")
    var headerVersion: String? = respXml.getChildContent(tagPath: "header|headerVersion")
    var funcCode: String? = respXml.getChildContent(tagPath: "result|funcCode")
    var softwareId: String? = respXml.getChildContent(tagPath: "software|softwareId")
    var softwareName: String? = respXml.getChildContent(tagPath: "software|softwareName")
    var softwareOperation: String? = respXml.getChildContent(tagPath: "software|softwareOperation")
    var softwareMainVersion: String? = respXml.getChildContent(tagPath: "software|softwareMainVersion")
    var softwareDevName: String? = respXml.getChildContent(tagPath: "software|softwareDevName")
    var softwareDevContact: String? = respXml.getChildContent(tagPath: "software|softwareDevContact")
    var softwareDevCountryCode: String? = respXml.getChildContent(tagPath: "software|softwareDevCountryCode")
    var softwareDevTaxNumber: String? = respXml.getChildContent(tagPath: "software|softwareDevTaxNumber")
    var encodedExchangeToken: String? = respXml.getChildContent(tagPath: "encodedExchangeToken")
    var tokenValidityFrom: String? = respXml.getChildContent(tagPath: "tokenValidityFrom")
    var tokenValidityTo: String? = respXml.getChildContent(tagPath: "tokenValidityTo")

}