Unicode C
Unicode C
Ibanity HTTP Signature for XS2A, Isabel Connect, Ponto Connect
See more Ibanity Examples
Demonstrates how to add a Signature header for Ibanity HTTP requests.Chilkat Unicode C Downloads
#include <C_CkJsonObjectW.h>
#include <C_CkDateTimeW.h>
#include <C_CkCrypt2W.h>
#include <C_CkStringBuilderW.h>
#include <C_CkPrivateKeyW.h>
#include <C_CkRsaW.h>
void ChilkatSample(void)
{
BOOL success;
HCkJsonObjectW json;
const wchar_t *payload;
HCkDateTimeW dtNow;
const wchar_t *created;
HCkCrypt2W crypt;
HCkStringBuilderW sbDigestHdrValue;
const wchar_t *request_target;
HCkStringBuilderW sbSigningString;
const wchar_t *idempotencyKey;
const wchar_t *signed_headers_list;
HCkPrivateKeyW privKey;
HCkRsaW rsa;
const wchar_t *sigBase64;
HCkStringBuilderW sbSigHeaderValue;
success = FALSE;
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// In order to sign your HTTP requests, you have to add 2 headers to the HTTP request: Digest: the digest of the request payload and Signature: the actual signature of the request.
// POST /xs2a/customer-access-tokens HTTP/1.1
// Host: api.ibanity.com
// Content-Type: application/json
// Digest: SHA-512=z4PhNX7vuL3xVChQ1m2AB9Yg5AULVxXcg/SpIdNs6c5H0NE8XYXysP+DGNKHfuwvY7kxvUdBeoGlODJ6+SfaPg==
// Ibanity-Idempotency-Key: 61f02718-eeee-46e1-b5eb-e8fd6e799c2d
// Signature: keyId="62f02718-eeee-46e1-b5eb-e8fd6e799c2e",created=1599659223,algorithm="hs2019",headers="(request-target) host digest (created) ibanity-idempotency-key",signature="SjWJWbWN7i0...zsbM="
//
// {"data":{"type":"customerAccessToken", "attributes":{"applicationCustomerReference":"15874569"}}}
// The payload (body) of the above HTTP request is the JSON.
// Build the JSON above.
// Use this online tool to generate code from sample JSON:
// Generate Code to Create JSON
json = CkJsonObjectW_Create();
CkJsonObjectW_UpdateString(json,L"data.type",L"customerAccessToken");
CkJsonObjectW_UpdateString(json,L"data.attributes.applicationCustomerReference",L"15874569");
payload = CkJsonObjectW_emit(json);
wprintf(L"payload = %s\n",payload);
// Step 1: Build the (created) virtual header
dtNow = CkDateTimeW_Create();
CkDateTimeW_SetFromCurrentSystemTime(dtNow);
created = CkDateTimeW_getAsUnixTimeStr(dtNow,FALSE);
wprintf(L"created = %s\n",created);
// Step 2: Build the Digest header
crypt = CkCrypt2W_Create();
CkCrypt2W_putHashAlgorithm(crypt,L"sha512");
CkCrypt2W_putEncodingMode(crypt,L"base64");
CkCrypt2W_putCharset(crypt,L"utf-8");
sbDigestHdrValue = CkStringBuilderW_Create();
CkStringBuilderW_Append(sbDigestHdrValue,L"SHA-512=");
CkStringBuilderW_Append(sbDigestHdrValue,CkCrypt2W_hashStringENC(crypt,CkJsonObjectW_emit(json)));
wprintf(L"%s\n",CkStringBuilderW_getAsString(sbDigestHdrValue));
// Step 3: Build the (request target) virtual header
// In order to build the signature you will need a virtual header named (request-target) (the parentheses are important).
// The (request-target) is the string concatenation of the HTTP method (in lowercase) with the path and query parameters.
request_target = L"post /xs2a/customer-access-tokens";
// Step 4: Build the signing string
// The signing string is the concatenation of the signed header names (in lowercase) and values separated by a LF.
// You must always sign the following headers: (request-target), host, (created), digest.
// If used, you must also sign the authorization header and any ibanity-* headers, such as ibanity-idempotency-key.
sbSigningString = CkStringBuilderW_Create();
CkStringBuilderW_Append(sbSigningString,L"(request-target): ");
CkStringBuilderW_AppendLine(sbSigningString,request_target,FALSE);
CkStringBuilderW_Append(sbSigningString,L"host: ");
CkStringBuilderW_AppendLine(sbSigningString,L"api.ibanity.com",FALSE);
CkStringBuilderW_Append(sbSigningString,L"digest: ");
CkStringBuilderW_AppendLine(sbSigningString,CkStringBuilderW_getAsString(sbDigestHdrValue),FALSE);
CkStringBuilderW_Append(sbSigningString,L"(created): ");
CkStringBuilderW_AppendLine(sbSigningString,created,FALSE);
CkStringBuilderW_Append(sbSigningString,L"ibanity-idempotency-key: ");
idempotencyKey = CkCrypt2W_generateUuid(crypt);
CkStringBuilderW_Append(sbSigningString,idempotencyKey);
// Step 5: Build the signed headers list
// To allow Ibanity to check the signed headers, you must provide a list of the header names. They should be lowercase and in the same order used to create the signing string.
signed_headers_list = L"(request-target) host digest (created) ibanity-idempotency-key";
// Step 6: Build the Signature header
// This is where the real signing happens. The signature header is a combination of several sub-headers -
//
// keyId: the identifier for the application's signature certificate, obtained from the Developer Portal
// algorithm: the digital signature algorithm used to generate the signature (must be hs2019)
// headers: The list of HTTP headers created in step 5
// signature: the Base64-encoded digital signature of the signing string created in step 4.
privKey = CkPrivateKeyW_Create();
success = CkPrivateKeyW_LoadEncryptedPemFile(privKey,L"my_ibanity_signature_private_key.pem",L"pem_password");
if (success == FALSE) {
wprintf(L"%s\n",CkPrivateKeyW_lastErrorText(privKey));
CkJsonObjectW_Dispose(json);
CkDateTimeW_Dispose(dtNow);
CkCrypt2W_Dispose(crypt);
CkStringBuilderW_Dispose(sbDigestHdrValue);
CkStringBuilderW_Dispose(sbSigningString);
CkPrivateKeyW_Dispose(privKey);
return;
}
rsa = CkRsaW_Create();
CkRsaW_putPssSaltLen(rsa,32);
CkRsaW_putEncodingMode(rsa,L"base64");
// Use the RSASSA-PSS signature algorithm
CkRsaW_putPkcsPadding(rsa,FALSE);
success = CkRsaW_UsePrivateKey(rsa,privKey);
if (success == FALSE) {
wprintf(L"%s\n",CkRsaW_lastErrorText(rsa));
CkJsonObjectW_Dispose(json);
CkDateTimeW_Dispose(dtNow);
CkCrypt2W_Dispose(crypt);
CkStringBuilderW_Dispose(sbDigestHdrValue);
CkStringBuilderW_Dispose(sbSigningString);
CkPrivateKeyW_Dispose(privKey);
CkRsaW_Dispose(rsa);
return;
}
// Sign the signing string.
sigBase64 = CkRsaW_signStringENC(rsa,CkStringBuilderW_getAsString(sbSigningString),L"sha-256");
if (CkRsaW_getLastMethodSuccess(rsa) == FALSE) {
wprintf(L"%s\n",CkRsaW_lastErrorText(rsa));
CkJsonObjectW_Dispose(json);
CkDateTimeW_Dispose(dtNow);
CkCrypt2W_Dispose(crypt);
CkStringBuilderW_Dispose(sbDigestHdrValue);
CkStringBuilderW_Dispose(sbSigningString);
CkPrivateKeyW_Dispose(privKey);
CkRsaW_Dispose(rsa);
return;
}
// Build the signature header value.
sbSigHeaderValue = CkStringBuilderW_Create();
CkStringBuilderW_Append(sbSigHeaderValue,L"keyId=\"");
// Use your identifier for the application's signature certificate, obtained from the Developer Portal
CkStringBuilderW_Append(sbSigHeaderValue,L"62f02718-eeee-46e1-b5eb-e8fd6e799c2e");
CkStringBuilderW_Append(sbSigHeaderValue,L"\",created=");
CkStringBuilderW_Append(sbSigHeaderValue,created);
CkStringBuilderW_Append(sbSigHeaderValue,L",algorithm=\"hs2019\",headers=\"");
CkStringBuilderW_Append(sbSigHeaderValue,signed_headers_list);
CkStringBuilderW_Append(sbSigHeaderValue,L"\",signature=\"");
CkStringBuilderW_Append(sbSigHeaderValue,sigBase64);
CkStringBuilderW_Append(sbSigHeaderValue,L"\"");
wprintf(L"%s\n",CkStringBuilderW_getAsString(sbSigHeaderValue));
CkJsonObjectW_Dispose(json);
CkDateTimeW_Dispose(dtNow);
CkCrypt2W_Dispose(crypt);
CkStringBuilderW_Dispose(sbDigestHdrValue);
CkStringBuilderW_Dispose(sbSigningString);
CkPrivateKeyW_Dispose(privKey);
CkRsaW_Dispose(rsa);
CkStringBuilderW_Dispose(sbSigHeaderValue);
}