C#

Get ECC Public Key in JWK Format (JSON Web Key)

See more ECC Examples

Demonstrates how to get an ECC public key in JWK (JSON Web Key) format.

Note: This example requires Chilkat v9.5.0.66 or later.

C#

bool success = false;

//  Note: This example requires Chilkat v9.5.0.66 or later.

//  Load a PEM file into memory.
Chilkat.StringBuilder sbPem = new Chilkat.StringBuilder();
success = sbPem.LoadFile("qa_data/pem/ecc_public.pem","utf-8");
if (success != true) {
    Debug.WriteLine("Failed to load PEM file.");
    return;
}

//  Load the PEM into a public key object.
Chilkat.PublicKey pubKey = new Chilkat.PublicKey();
success = pubKey.LoadFromString(sbPem.GetAsString());
if (success != true) {
    Debug.WriteLine(pubKey.LastErrorText);
    return;
}

//  Get the public key in JWK format:
string jwk = pubKey.GetJwk();

//  The GetJwk method will return the JWK in the most compact JSON format possible,
//  as a single line with no extra whitespace.  To get a more human-readable JWK (for this example),
//  load into a Chilkat JSON object and emit non-compact:

Chilkat.JsonObject json = new Chilkat.JsonObject();
json.Load(jwk);
json.EmitCompact = false;
Debug.WriteLine("ECC Public Key in JWK format:");
Debug.WriteLine(json.Emit());

//  Sample output:
//  { 
//    "kty": "EC",
//    "crv": "P-256",
//    "x": "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE",
//    "y": "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU"
//  }
//  
//  Additional information can be added like this:
json.AppendString("use","enc");
json.AppendString("kid","123ABC");

//  Now examine the JSON:
Debug.WriteLine(json.Emit());

//  { 
//    "kty": "EC",
//    "crv": "P-256",
//    "x": "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE",
//    "y": "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU",
//    "use": "enc",
//    "kid": "123ABC"
//  }