Unicode C

Create JWT Using Ed25519 Private Key (EdDSA)

See more JSON Web Token (JWT) Examples

Demonstrates how to create a JWT using an Ed25519 private key. If the private key is Ed25519, which is an EdDSA algorithm, the JOSE header's "alg" member should be set to "EdDSA".

Note: This example requires Chilkat v9.5.0.95 or greater.

Unicode C

#include <C_CkPrivateKeyW.h>
#include <C_CkJwtW.h>
#include <C_CkJsonObjectW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkPrivateKeyW privKey;
    HCkJwtW jwt;
    HCkJsonObjectW jose;
    HCkJsonObjectW claims;
    int curDateTime;
    const wchar_t *token;

    success = FALSE;

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

    // Demonstrates how to create a JWT using an Ed25519 private key.

    privKey = CkPrivateKeyW_Create();

    // Load an Ed25519 (EdDSA) private key from a PEM file.
    success = CkPrivateKeyW_LoadPemFile(privKey,L"qa_data/eddsa/ed25519.pem");
    if (success != TRUE) {
        wprintf(L"%s\n",CkPrivateKeyW_lastErrorText(privKey));
        CkPrivateKeyW_Dispose(privKey);
        return;
    }

    jwt = CkJwtW_Create();

    // Build the JOSE header
    jose = CkJsonObjectW_Create();

    // -----------------------------------------------------------------
    // Note: This example requires Chilkat v9.5.0.95 or greater.
    // -----------------------------------------------------------------
    success = CkJsonObjectW_AppendString(jose,L"alg",L"EdDSA");
    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");

    // (optional) Set the timestamp of when the JWT was created to now.
    curDateTime = CkJwtW_GenNumericDate(jwt,0);
    success = CkJsonObjectW_AddIntAt(claims,-1,L"iat",curDateTime);

    // (optional)  Set the "not process before" timestamp to now.
    success = CkJsonObjectW_AddIntAt(claims,-1,L"nbf",curDateTime);

    // (optional)  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.
    token = CkJwtW_createJwtPk(jwt,CkJsonObjectW_emit(jose),CkJsonObjectW_emit(claims),privKey);

    wprintf(L"%s\n",token);

    // Example output:
    // eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJodHRwOi8vZXhhbXBsZS5vcmciLCJzdWIiOiJKb2huIiwiYXVkIjoiaHR0cDovL2V4YW1wbGUuY29tIiwiaWF0IjoxNjg3OTcwNjgyLCJuYmYiOjE2ODc5NzA2ODIsImV4cCI6MTY4Nzk3NDI4Mn0.eyfrDJfuWJSJVJPfAUYb_p_c-LF_YULHGRaZx82MLLjMLCCFEEGckp8icuayf5bLW9ah20LzYYt0JgOBIB0RDg


    CkPrivateKeyW_Dispose(privKey);
    CkJwtW_Dispose(jwt);
    CkJsonObjectW_Dispose(jose);
    CkJsonObjectW_Dispose(claims);

    }