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(Swift) Create JWT Using HS256, HS384, or HS512Demonstrates how to create a JWT using HS256, HS384, or HS512. (HS256 is JWT's acronym for HMAC-SHA256.) When HMAC is used, the secret is a shared secret (i.e. password) that both client and server know beforehand. This example also demonstrates how to include time constraints:
func chilkatTest() { // Demonstrates how to create an HMAC JWT using a shared secret (password). // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. let jwt = CkoJwt()! // Build the JOSE header let jose = CkoJsonObject()! // Use HS256. Pass the string "HS384" or "HS512" to use a different algorithm. var success: Bool = jose.append("alg", value: "HS256") success = jose.append("typ", value: "JWT") // Now build the JWT claims (also known as the payload) let claims = CkoJsonObject()! success = claims.append("iss", value: "http://example.org") success = claims.append("sub", value: "John") success = claims.append("aud", value: "http://example.com") // Set the timestamp of when the JWT was created to now. var curDateTime: Int = jwt.genNumericDate(0).intValue success = claims.addInt(at: -1, name: "iat", value: curDateTime) // Set the "not process before" timestamp to now. success = claims.addInt(at: -1, name: "nbf", value: curDateTime) // Set the timestamp defining an expiration time (end time) for the token // to be now + 1 hour (3600 seconds) success = claims.addInt(at: -1, name: "exp", value: curDateTime + 3600) // Produce the smallest possible JWT: jwt.autoCompact = true var strJwt: String? = jwt.createJwt(jose.emit(), payload: claims.emit(), password: "secret") print("\(strJwt!)") } |
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