Lianja

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.

Lianja

llSuccess = .F.

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

// Load a PEM file into memory.
loSbPem = createobject("CkStringBuilder")
llSuccess = loSbPem.LoadFile("qa_data/pem/ecc_public.pem","utf-8")
if (llSuccess <> .T.) then
    ? "Failed to load PEM file."
    release loSbPem
    return
endif

// Load the PEM into a public key object.
loPubKey = createobject("CkPublicKey")
llSuccess = loPubKey.LoadFromString(loSbPem.GetAsString())
if (llSuccess <> .T.) then
    ? loPubKey.LastErrorText
    release loSbPem
    release loPubKey
    return
endif

// Get the public key in JWK format:
lcJwk = loPubKey.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:

loJson = createobject("CkJsonObject")
loJson.Load(lcJwk)
loJson.EmitCompact = .F.
? "ECC Public Key in JWK format:"
? loJson.Emit()

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

// Now examine the JSON:
? loJson.Emit()

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


release loSbPem
release loPubKey
release loJson