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(PowerBuilder) 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.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_SbPem
integer li_Success
oleobject loo_PrivKey
string ls_Jwk
oleobject loo_Json

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

// Load a PEM file into memory.
loo_SbPem = create oleobject
li_rc = loo_SbPem.ConnectToNewObject("Chilkat_9_5_0.StringBuilder")
if li_rc < 0 then
    destroy loo_SbPem
    MessageBox("Error","Connecting to COM object failed")
    return
end if
li_Success = loo_SbPem.LoadFile("qa_data/pem/ecc_privKey.pem","utf-8")
if li_Success <> 1 then
    Write-Debug "Failed to load PEM file."
    destroy loo_SbPem
    return
end if

// Load the PEM into a private key object.
loo_PrivKey = create oleobject
li_rc = loo_PrivKey.ConnectToNewObject("Chilkat_9_5_0.PrivateKey")

li_Success = loo_PrivKey.LoadPem(loo_SbPem.GetAsString())
if li_Success <> 1 then
    Write-Debug loo_PrivKey.LastErrorText
    destroy loo_SbPem
    destroy loo_PrivKey
    return
end if

// Get the private key in JWK format:
ls_Jwk = loo_PrivKey.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:

loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_Json.Load(ls_Jwk)
loo_Json.EmitCompact = 0
Write-Debug "ECC Private Key in JWK format:"
Write-Debug loo_Json.Emit()

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

// Additional information can be added like this:
loo_Json.AppendString("use","enc")
loo_Json.AppendString("kid","123ABC")

// Now examine the JSON:
Write-Debug loo_Json.Emit()

// { 
//   "kty": "EC",
//   "crv": "P-256",
//   "x": "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE",
//   "y": "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU",
//   "d": "EbVzfPnZPxfAyxqEZV05laAoJAl-_6Xt2O4mOB611sM",
//   "use": "enc",
//   "kid": "123ABC"
// }


destroy loo_SbPem
destroy loo_PrivKey
destroy loo_Json

 

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