(VB.NET UWP/WinRT) Load EC Public Key from X,Y Values

Demonstrates how to load an EC public key from X and Y values.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

Dim success As Boolean

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

' Build a JWK that looks like this:

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

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

' Load from the JWK.
Dim pubkey As New Chilkat.PublicKey
success = pubkey.LoadFromString(json.Emit())
If (success = False) Then
    Debug.WriteLine(pubkey.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Success.")