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(Unicode C) Create JWT using a Brainpool EC KeySee more JSON Web Token (JWT) ExamplesDemonstrates how to create a JWT using an EC private key. This is for JOSE headers having an "alg" member with any of the following values:
This example also demonstrates how to include time constraints:
#include <C_CkPrivateKeyW.h> #include <C_CkJwtW.h> #include <C_CkJsonObjectW.h> void ChilkatSample(void) { HCkPrivateKeyW privKey; BOOL success; HCkJwtW jwt; HCkJsonObjectW jose; HCkJsonObjectW claims; int curDateTime; const wchar_t *token; // Demonstrates how to create a JWT using a brainpool EC private key. // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. privKey = CkPrivateKeyW_Create(); // Load a brainpool EC key. success = CkPrivateKeyW_LoadPemFile(privKey,L"c:/qa_data/pem/ec_brainpool_privKey.pem"); if (success != TRUE) { wprintf(L"%s\n",CkPrivateKeyW_lastErrorText(privKey)); CkPrivateKeyW_Dispose(privKey); return; } // You can examine the curve name of the key you just loaded by getting the private in XML format: // <ECCKeyValue curve="CURVE_NAME">...</ECCKeyValue> wprintf(L"%s\n",CkPrivateKeyW_getXml(privKey)); jwt = CkJwtW_Create(); // Build the JOSE header jose = CkJsonObjectW_Create(); // Use the brainpool curve name matching the private key you just loaded. // Use "BP256R1", or "BP384R1", etc. success = CkJsonObjectW_AppendString(jose,L"alg",L"BP256R1"); success = CkJsonObjectW_AppendString(jose,L"typ",L"JWT"); // Now build the JWT claims (also known as the payload) claims = CkJsonObjectW_Create(); success = CkJsonObjectW_AppendString(claims,L"iss",L"http://example.org"); success = CkJsonObjectW_AppendString(claims,L"sub",L"John"); success = CkJsonObjectW_AppendString(claims,L"aud",L"http://example.com"); // Set the timestamp of when the JWT was created to now. curDateTime = CkJwtW_GenNumericDate(jwt,0); success = CkJsonObjectW_AddIntAt(claims,-1,L"iat",curDateTime); // Set the "not process before" timestamp to now. success = CkJsonObjectW_AddIntAt(claims,-1,L"nbf",curDateTime); // Set the timestamp defining an expiration time (end time) for the token // to be now + 1 hour (3600 seconds) success = CkJsonObjectW_AddIntAt(claims,-1,L"exp",curDateTime + 3600); // Produce the smallest possible JWT: CkJwtW_putAutoCompact(jwt,TRUE); // Create the JWT token. This is where the ECC signature is created. token = CkJwtW_createJwtPk(jwt,CkJsonObjectW_emit(jose),CkJsonObjectW_emit(claims),privKey); wprintf(L"%s\n",token); CkPrivateKeyW_Dispose(privKey); CkJwtW_Dispose(jwt); CkJsonObjectW_Dispose(jose); CkJsonObjectW_Dispose(claims); } |
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