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(Unicode C) Adyen HMAC Signature Calculation for Hosted Payment PagesDemonstrates how to do the HMAC Signature Calculation for a hosted payment page (HPP) in Adyen. For a C# ASP.NET Razor Pages example showing the HTML Form with HMAC signature code, see Adyen HMAC Signature Calculation in C# For more information, see https://docs.adyen.com/classic-integration/hosted-payment-pages/hmac-signature-calculation/
#include <C_CkGzipW.h> #include <C_CkXmlW.h> #include <C_CkStringBuilderW.h> #include <C_CkCrypt2W.h> void ChilkatSample(void) { BOOL success; const wchar_t *strHtml; HCkGzipW gzip; const wchar_t *gzOrderData; HCkXmlW xml; const wchar_t *sessionValidity; const wchar_t *countryCode; const wchar_t *shopperLocale; const wchar_t *merchantReference; const wchar_t *merchantAccount; const wchar_t *paymentAmount; const wchar_t *currencyCode; const wchar_t *skinCode; const wchar_t *shopperReference; const wchar_t *shopperEmail; const wchar_t *shipBeforeDate; HCkStringBuilderW sbTags; HCkStringBuilderW sbValues; HCkStringBuilderW sbContent; int n; int i; int numReplaced; HCkStringBuilderW sbSigningStr; HCkCrypt2W crypt; const wchar_t *hmacKey; const wchar_t *merchantSig; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. strHtml = L"<table class=\"od\"><tr><th>Description</th><th>Quantity</th><th>Amount</th></tr><tr><td>1 Digital Camera</td><td class=\"r\">1</td><td class=\"r\">100 GBP</td></tr><tr><td class=\"b\">Total</td><td class=\"r\"></td><td class=\"b r\">100.00 GBP</td></tr></table>"; gzip = CkGzipW_Create(); gzOrderData = CkGzipW_compressStringENC(gzip,strHtml,L"utf-8",L"base64"); xml = CkXmlW_Create(); CkXmlW_putTag(xml,L"keyValuePairs"); CkXmlW_NewChild2(xml,L"orderData",gzOrderData); // required, The payment deadline; the payment needs to occur within the specified time value. sessionValidity = L"2019-08-11T10:30:00Z"; CkXmlW_NewChild2(xml,L"sessionValidity",sessionValidity); // optional. Normally we'll let Adyen automatically know the country based on the IP address. // By default, the payment methods offered to a shopper are filtered based on the country the shopper's IP address is mapped to. // In this way, shoppers are not offered payment methods that are not available in the country they are carrying out the transaction from. // This IP-to-country mapping is not 100% accurate, so if you have already established the country of the shopper, you can set it explicitly // in the countryCode parameter. countryCode = L"GB"; CkXmlW_NewChild2(xml,L"countryCode",countryCode); // optional shopperLocale = L"en_GB"; // If not specified, the locale preference is set to en_GB by default. // When it is not necessary to include the country-specific part, use only the language code. // For example: it instead of it_IT to set the locale preferences to Italian. CkXmlW_NewChild2(xml,L"shopperLocale",shopperLocale); // required, A reference to uniquely identify the payment. This reference is used in all communication with you about the payment status. // We recommend using a unique value per payment; however, it is not a requirement. If you need to provide multiple references for a transaction, // you can enter them in this field. Separate each reference value with a hyphen character ("-"). This field has a length restriction: // you can enter max. 80 characters. merchantReference = L"paymentTest1234"; CkXmlW_NewChild2(xml,L"merchantReference",merchantReference); // required, The merchant account identifier you want to process the (transaction) request with. merchantAccount = L"ChilkatSoftwareIncCOM"; CkXmlW_NewChild2(xml,L"merchantAccount",merchantAccount); // required. 10000 for $100.00 paymentAmount = L"10000"; CkXmlW_NewChild2(xml,L"paymentAmount",paymentAmount); // required, The three-character ISO currency code currencyCode = L"GBP"; CkXmlW_NewChild2(xml,L"currencyCode",currencyCode); // required. skinCode = L"S7uWsvfB"; CkXmlW_NewChild2(xml,L"skinCode",skinCode); // optional, A unique identifier for the shopper, for example, a customer ID. // We recommend providing this information, as it is used in velocity fraud checks. It is also the key in recurring payments. // This field is mandatory in recurring payments. shopperReference = L"somebody@example.com"; CkXmlW_NewChild2(xml,L"shopperReference",shopperReference); // optional shopperEmail = L"somebody@example.com"; CkXmlW_NewChild2(xml,L"shopperEmail",shopperEmail); // optional, An integer value that adds up to the normal fraud score. // The value can be either a positive or negative integer. CkXmlW_NewChild2(xml,L"offset",L"0"); // Apparently this is a required field. shipBeforeDate = L"2019-06-04"; CkXmlW_NewChild2(xml,L"shipBeforeDate",shipBeforeDate); CkXmlW_SortByTag(xml,TRUE); // Encode... // "\" (backslash) as "\\" // ":" (colon) as "\:" sbTags = CkStringBuilderW_Create(); sbValues = CkStringBuilderW_Create(); sbContent = CkStringBuilderW_Create(); n = CkXmlW_getNumChildren(xml); i = 0; while (i < n) { if (i > 0) { CkStringBuilderW_Append(sbTags,L":"); CkStringBuilderW_Append(sbValues,L":"); } CkXmlW_GetChild2(xml,i); CkStringBuilderW_Append(sbTags,CkXmlW_tag(xml)); CkStringBuilderW_SetString(sbContent,CkXmlW_content(xml)); numReplaced = CkStringBuilderW_Replace(sbContent,L"\\",L"\\\\"); numReplaced = CkStringBuilderW_Replace(sbContent,L":",L"\\:"); CkStringBuilderW_AppendSb(sbValues,sbContent); CkXmlW_GetParent2(xml); i = i + 1; } sbSigningStr = CkStringBuilderW_Create(); CkStringBuilderW_AppendSb(sbSigningStr,sbTags); CkStringBuilderW_Append(sbSigningStr,L":"); CkStringBuilderW_AppendSb(sbSigningStr,sbValues); crypt = CkCrypt2W_Create(); CkCrypt2W_putHashAlgorithm(crypt,L"sha256"); CkCrypt2W_putMacAlgorithm(crypt,L"hmac"); hmacKey = L"934D1E806DDD99595EB430076FD7F8E4D12D0A3F51243A4C0C3897703118E739"; CkCrypt2W_SetMacKeyEncoded(crypt,hmacKey,L"hex"); CkCrypt2W_putEncodingMode(crypt,L"base64"); merchantSig = CkCrypt2W_hmacStringENC(crypt,CkStringBuilderW_getAsString(sbSigningStr)); wprintf(L"%s\n",merchantSig); CkGzipW_Dispose(gzip); CkXmlW_Dispose(xml); CkStringBuilderW_Dispose(sbTags); CkStringBuilderW_Dispose(sbValues); CkStringBuilderW_Dispose(sbContent); CkStringBuilderW_Dispose(sbSigningStr); CkCrypt2W_Dispose(crypt); } |
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