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Load ECC Private Key from JWK Format (JSON Web Key)

Demonstrates how to load an ECC private key from JWK (JSON Web Key) format.

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

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Local $bSuccess = False

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

; First build a JWK sample to load..
$oJson = ObjCreate("Chilkat.JsonObject")
$oJson.UpdateString("kty","EC")
$oJson.UpdateString("crv","P-256")
$oJson.UpdateString("x","oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE")
$oJson.UpdateString("y","vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU")
$oJson.UpdateString("d","EbVzfPnZPxfAyxqEZV05laAoJAl-_6Xt2O4mOB611sM")

; The JSON contains the following:
; { 
;   "kty": "EC",
;   "crv": "P-256",
;   "x": "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE",
;   "y": "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU",
;   "d": "EbVzfPnZPxfAyxqEZV05laAoJAl-_6Xt2O4mOB611sM"
; }

; Note: The JSON can contain other members, such as "use", "kid", or anything else.  These will be ignored.
$oJson.EmitCompact = False

; Show the JWK string to be loaded:
Local $sJwkStr = $oJson.Emit()

$oPrivKey = ObjCreate("Chilkat.PrivateKey")
$bSuccess = $oPrivKey.LoadJwk($sJwkStr)
If ($bSuccess <> True) Then
    ConsoleWrite($oPrivKey.LastErrorText & @CRLF)
    Exit
EndIf

; OK.. the JWK is loaded.  It can be used in whatever way desired...

; The key can be retrieved in any other format, such as XML or PEM..
ConsoleWrite($oPrivKey.GetXml() & @CRLF)

; XML output:
; <ECCKeyValue curve="secp256r1">MHcCAQEEIBG1c3z52T8XwMsahGVdOZWgKCQJfv+l7djuJjgetdbDoAoGCCqGSM49AwEHoEQDQgAEoBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxG+9DLFmRSMlBQ9T/RsLLc+PmpB1+7yPAR+oR5gZn3kJQ==</ECCKeyValue>

ConsoleWrite($oPrivKey.GetPkcs8EncryptedPem("secret") & @CRLF)

; PEM output
; 
; -----BEGIN ENCRYPTED PRIVATE KEY-----
; MIHFMEAGCSqGSIb3DQEFDTAzMBsGCSqGSIb3DQEFDDAOBAiku9rUjavLQQICCAAw
; FAYIKoZIhvcNAwcECGsl/5nLai+JBIGAVIqKAdfcRQNLl1t3x+n8OZ92d1H+qgjS
; Hs83wn2joJK4nlqy+rzosZxQ3e8NTJQyUEWZWcjqMj/N0phS3QWtcD/qbda5oEcv
; QgtU60cZ4ql3truefAmlZz2PdpOfqtYhxlvjJQxnyojn4ntj69OwLOt9SZbaBQQi
; KUL8KXT4Pq8=
; -----END ENCRYPTED PRIVATE KEY-----