(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 <C_CkPrivateKey.h>
#include <C_CkJwt.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    HCkPrivateKey privKey;
    BOOL success;
    HCkJwt jwt;
    HCkJsonObject jose;
    HCkJsonObject claims;
    int curDateTime;
    const char *token;

    // 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 = CkPrivateKey_Create();

    // Load an Ed25519 (EdDSA) private key from a PEM file.
    success = CkPrivateKey_LoadPemFile(privKey,"qa_data/eddsa/ed25519.pem");
    if (success != TRUE) {
        printf("%s\n",CkPrivateKey_lastErrorText(privKey));
        CkPrivateKey_Dispose(privKey);
        return;
    }

    jwt = CkJwt_Create();

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

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

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

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

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

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

    // Produce the smallest possible JWT:
    CkJwt_putAutoCompact(jwt,TRUE);

    // Create the JWT token.
    token = CkJwt_createJwtPk(jwt,CkJsonObject_emit(jose),CkJsonObject_emit(claims),privKey);

    printf("%s\n",token);

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


    CkPrivateKey_Dispose(privKey);
    CkJwt_Dispose(jwt);
    CkJsonObject_Dispose(jose);
    CkJsonObject_Dispose(claims);

    }