(Swift 2) Generate an Ed25519 Key Pair

Demonstrates how to generate a new Ed25519 public/private key pair.

Note: This example requires Chilkat v9.5.0.83 or greater.

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func chilkatTest() {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let eddsa = CkoEdDSA()
    let prng = CkoPrng()
    let privKey = CkoPrivateKey()

    // Generates a new eddsa key and stores it in privKey.
    var success: Bool = eddsa.GenEd25519Key(prng, privKey: privKey)
    if success == false {
        print("\(eddsa.LastErrorText)")
        return
    }

    // Examine the ed25519 key in JWK format;
    var jwk: String? = privKey.GetJwk()

    let json = CkoJsonObject()
    json.Load(jwk)
    json.EmitCompact = false
    print("\(json.Emit())")

    // Sample output:
    // {
    //   "kty": "OKP",
    //   "crv": "Ed25519",
    //   "x": "SE2Kne5xt51z1eciMH2T2ftDQp96Gl6FhY6zSQujiP0",
    //   "d": "O-eRXewadF0sNyB0U9omcnt8Qg2ZmeK3WSXPYgqe570",
    //   "use": "sig"
    // }

    // In the above JWK, x is the public key, y is the private key.
    // Both are 32 bytes and are base64-url encoded.

}