(JavaScript) Create JWT Using ECC (ES256, ES384, or ES512)
Demonstrates how to create a JWT using an ECC private key. This is for JOSE headers with an "alg" of ES256, ES384, or ES512. When ECC is used, the private key signs (creates) the JWT, and the public key is for verification.
This example also demonstrates how to include time constraints:
- nbf: Not Before Time
- exp: Expiration Time
- iat: Issue At Time
var success = false;
// Demonstrates how to create a JWT using an ECC private key.
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
var privKey = new CkPrivateKey();
// Load an ECC private key from a PEM file.
success = privKey.LoadPemFile("qa_data/pem/ecc_privKey.pem");
if (success !== true) {
console.log(privKey.LastErrorText);
return;
}
var jwt = new CkJwt();
// Build the JOSE header
var jose = new CkJsonObject();
// Use ES256. Pass the string "ES384" or "ES512" to use ECC with SHA-384 or SHA-512.
success = jose.AppendString("alg","ES256");
success = jose.AppendString("typ","JWT");
// Now build the JWT claims (also known as the payload)
var claims = new CkJsonObject();
success = claims.AppendString("iss","http://example.org");
success = claims.AppendString("sub","John");
success = claims.AppendString("aud","http://example.com");
// Set the timestamp of when the JWT was created to now.
var curDateTime = jwt.GenNumericDate(0);
success = claims.AddIntAt(-1,"iat",curDateTime);
// Set the "not process before" timestamp to now.
success = claims.AddIntAt(-1,"nbf",curDateTime);
// 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.AutoCompact = true;
// Create the JWT token. This is where the ECC signature is created.
var token = jwt.CreateJwtPk(jose.Emit(),claims.Emit(),privKey);
console.log(token);
// Example output:
// eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJodHRwOi8vZXhhbXBsZS5vcmciLCJzdWIiOiJKb2huIiwiYXVkIjoiaHR0cDovL2V4YW1wbGUuY29tIiwiaWF0IjoxNDg1NzA4NzkyLCJuYmYiOjE0ODU3MDg3OTIsImV4cCI6MTQ4NTcxMjM5Mn0.wqsuyJpxJ073ox-lOiLFqG1lQocXe4hGf2XGZJRrO3qn0UusxI_bu3Gzky8gBsH4sA4u9TWZn5M-1wYMMIJk6Q
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