.NET Core C#

Load EC Public Key from X,Y Values

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Demonstrates how to load an EC public key from X and Y values. .NET Core C#

bool success = false;

// We have the following x and y values in base64 (for an EC point on the P-256 curve).
string x = "Dn7uB1O7kgk74G6qfQwFJESeDnxO6lLjGZFWZJE16tw";
string y = "iOWA5DInzK6nuUGvHJbMVq1Dpj248FqSV2teN3HzmhU";

// Build a JWK that looks like this:

// {
//   "kty": "EC",
//   "crv": "P-256",
//   "x": "Dn7uB1O7kgk74G6qfQwFJESeDnxO6lLjGZFWZJE16tw",
//   "y": "iOWA5DInzK6nuUGvHJbMVq1Dpj248FqSV2teN3HzmhU"
// }

Chilkat.JsonObject json = new Chilkat.JsonObject();
json.UpdateString("kty","EC");
json.UpdateString("crv","P-256");
json.UpdateString("x",x);
json.UpdateString("y",y);

// Load from the JWK.
Chilkat.PublicKey pubkey = new Chilkat.PublicKey();
success = pubkey.LoadFromString(json.Emit());
if (success == false) {
    Debug.WriteLine(pubkey.LastErrorText);
    return;
}

Debug.WriteLine("Success.");