(Swift 3,4,5...) Create JWT using a Certificate's Private Key

See more JSON Web Token (JWT) Examples

Demonstrates how to create a JWT using a certificate's private key.

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func chilkatTest() {
    // 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 certificate's private key.

    let cert = CkoCert()!

    // Load an ECC private key from a PEM file.
    var success: Bool = cert.loadPfxFile("c:/temp/myPfx.pfx", password: "pfxPassword")
    if success != true {
        print("\(cert.lastErrorText!)")
        return
    }

    let jwt = CkoJwt()!

    // Build the JOSE header
    let jose = CkoJsonObject()!
    // Note: The IsEcdsa function was added in Chilkat v10.1.0
    if cert.isEcdsa() == true {
        // Use ES256.  Pass the string "ES384" or "ES512" to use ECC with SHA-384 or SHA-512.
        jose.append("alg", value: "ES256")
    }
    else {
        // Probably RSA...
        // Use RS256.  Pass the string "RS384" or "RS512" to use RSA with SHA-384 or SHA-512.
        jose.append("alg", value: "RS256")
    }

    jose.append("typ", value: "JWT")

    // Now build the JWT claims (also known as the payload)
    let claims = CkoJsonObject()!
    claims.append("iss", value: "http://example.org")
    claims.append("sub", value: "John")
    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
    claims.addInt(at: -1, name: "iat", value: curDateTime)

    // Set the "not process before" timestamp to now.
    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)
    claims.addInt(at: -1, name: "exp", value: curDateTime + 3600)

    // Produce the smallest possible JWT:
    jwt.autoCompact = true

    // Create the JWT token.
    var token: String? = jwt.createCert(jose.emit(), payload: claims.emit(), cert: cert)

    print("\(token!)")

    // Example output:
    // eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJodHRwOi8vZXhhbXBsZS5vcmciLCJzdWIiOiJKb2huIiwiYXVkIjoiaHR0cDovL2V4YW1wbGUuY29tIiwiaWF0IjoxNDg1NzA4NzkyLCJuYmYiOjE0ODU3MDg3OTIsImV4cCI6MTQ4NTcxMjM5Mn0.wqsuyJpxJ073ox-lOiLFqG1lQocXe4hGf2XGZJRrO3qn0UusxI_bu3Gzky8gBsH4sA4u9TWZn5M-1wYMMIJk6Q

}