Xojo Plugin

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. Xojo Plugin

Dim success As Boolean
success = False

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

// Build a JWK that looks like this:

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

Dim json As New Chilkat.JsonObject
success = json.UpdateString("kty","EC")
success = json.UpdateString("crv","P-256")
success = json.UpdateString("x",x)
success = json.UpdateString("y",y)

// Load from the JWK.
Dim pubkey As New Chilkat.PublicKey
success = pubkey.LoadFromString(json.Emit())
If (success = False) Then
    System.DebugLog(pubkey.LastErrorText)
    Return
End If

System.DebugLog("Success.")