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(Lianja) Get ECC Private Key in JWK Format (JSON Web Key)

Demonstrates how to get an ECC private key in JWK (JSON Web Key) format.

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

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Chilkat Lianja Extension

//  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_privKey.pem","utf-8")
if (llSuccess <> .T.) then
    ? "Failed to load PEM file."
    release loSbPem
    return
endif

//  Load the PEM into a private key object.
loPrivKey = createobject("CkPrivateKey")
llSuccess = loPrivKey.LoadPem(loSbPem.GetAsString())
if (llSuccess <> .T.) then
    ? loPrivKey.LastErrorText
    release loSbPem
    release loPrivKey
    return
endif

//  Get the private key in JWK format:
lcJwk = loPrivKey.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 Private Key in JWK format:"
? loJson.Emit()

//  Sample output:
//  {
//    "kty": "EC",
//    "crv": "P-256",
//    "x": "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE",
//    "y": "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU",
//    "d": "EbVzfPnZPxfAyxqEZV05laAoJAl-_6Xt2O4mOB611sM"
//  }
// 

//  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",
//    "d": "EbVzfPnZPxfAyxqEZV05laAoJAl-_6Xt2O4mOB611sM",
//    "use": "enc",
//    "kid": "123ABC"
//  }


release loSbPem
release loPrivKey
release loJson

 

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