(C++) Create JWT Using Ed25519 Private Key (EdDSA)

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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.

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#include <CkPrivateKey.h>
#include <CkJwt.h>
#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    // 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.

    CkPrivateKey privKey;

    // Load an Ed25519 (EdDSA) private key from a PEM file.
    bool success = privKey.LoadPemFile("qa_data/eddsa/ed25519.pem");
    if (success != true) {
        std::cout << privKey.lastErrorText() << "\r\n";
        return;
    }

    CkJwt jwt;

    // Build the JOSE header
    CkJsonObject jose;

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

    // Now build the JWT claims (also known as the payload)
    CkJsonObject claims;
    success = claims.AppendString("iss","http://example.org");
    success = claims.AppendString("sub","John");
    success = claims.AppendString("aud","http://example.com");

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

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

    // (optional)  Set the timestamp defining an expiration time (end time) for the token
    // to be now + 1 hour (3600 seconds)
    success = claims.AddIntAt(-1,"exp",curDateTime + 3600);

    // Produce the smallest possible JWT:
    jwt.put_AutoCompact(true);

    // Create the JWT token.
    const char *token = jwt.createJwtPk(jose.emit(),claims.emit(),privKey);

    std::cout << token << "\r\n";

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