(Xojo Plugin) 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.
Dim sbPem As New Chilkat.StringBuilder
Dim success As Boolean
success = sbPem.LoadFile("qa_data/pem/ecc_public.pem","utf-8")
If (success <> True) Then
    System.DebugLog("Failed to load PEM file.")
    Return
End If

// Load the PEM into a public key object.
Dim pubKey As New Chilkat.PublicKey
success = pubKey.LoadFromString(sbPem.GetAsString())
If (success <> True) Then
    System.DebugLog(pubKey.LastErrorText)
    Return
End If

// Get the public key in JWK format:
Dim jwk As 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:

Dim json As New Chilkat.JsonObject
success = json.Load(jwk)
json.EmitCompact = False
System.DebugLog("ECC Public Key in JWK format:")
System.DebugLog(json.Emit())

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

// Now examine the JSON:
System.DebugLog(json.Emit())

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