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

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.

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

    // Load a PEM file into memory.
    sbPem := chilkat.NewStringBuilder()
    success := sbPem.LoadFile("qa_data/pem/ecc_public.pem","utf-8")
    if success != true {
        fmt.Println("Failed to load PEM file.")
        sbPem.DisposeStringBuilder()
        return
    }

    // Load the PEM into a public key object.
    pubKey := chilkat.NewPublicKey()
    success = pubKey.LoadFromString(*sbPem.GetAsString())
    if success != true {
        fmt.Println(pubKey.LastErrorText())
        sbPem.DisposeStringBuilder()
        pubKey.DisposePublicKey()
        return
    }

    // Get the public key in JWK format:
    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:

    json := chilkat.NewJsonObject()
    json.Load(*jwk)
    json.SetEmitCompact(false)
    fmt.Println("ECC Public Key in JWK format:")
    fmt.Println(*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:
    fmt.Println(*json.Emit())

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

    sbPem.DisposeStringBuilder()
    pubKey.DisposePublicKey()
    json.DisposeJsonObject()