(PureBasic) Get RSA Private Key in JWK Format (JSON Web Key)

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

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

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkStringBuilder.pb"
IncludeFile "CkPrivateKey.pb"
IncludeFile "CkJsonObject.pb"

Procedure ChilkatExample()

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

    ; Load a PEM file into memory.
    sbPem.i = CkStringBuilder::ckCreate()
    If sbPem.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i = CkStringBuilder::ckLoadFile(sbPem,"qa_data/pem/rsa_passwd.pem","utf-8")
    If success <> 1
        Debug "Failed to load PEM file."
        CkStringBuilder::ckDispose(sbPem)
        ProcedureReturn
    EndIf

    ; Load the PEM into a private key object.
    privKey.i = CkPrivateKey::ckCreate()
    If privKey.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkPrivateKey::ckLoadEncryptedPem(privKey,CkStringBuilder::ckGetAsString(sbPem),"passwd")
    If success <> 1
        Debug CkPrivateKey::ckLastErrorText(privKey)
        CkStringBuilder::ckDispose(sbPem)
        CkPrivateKey::ckDispose(privKey)
        ProcedureReturn
    EndIf

    ; Get the private key in JWK format:
    jwk.s = CkPrivateKey::ckGetJwk(privKey)

    ; 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:

    json.i = CkJsonObject::ckCreate()
    If json.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckLoad(json,jwk)
    CkJsonObject::setCkEmitCompact(json, 0)
    Debug "RSA Private Key in JWK format:"
    Debug CkJsonObject::ckEmit(json)

    ; Sample output:
    ; { 
    ;   "kty": "RSA",
    ;   "n": "33TqqLR3eeUmDtHS89qF3p4MP7Wfqt2Zjj3lZjLjjCGDvwr9cJNlNDiuKboODgUiT4ZdPWbOiMAfDcDzlOxA04DDnEFGAf-kDQiNSe2ZtqC7bnIc8-KSG_qOGQIVaay4Ucr6ovDkykO5Hxn7OU7sJp9TP9H0JH8zMQA6YzijYH9LsupTerrY3U6zyihVEDXXOv08vBHk50BMFJbE9iwFwnxCsU5-UZUZYw87Uu0n4LPFS9BT8tUIvAfnRXIEWCha3KbFWmdZQZlyrFw0buUEf0YN3_Q0auBkdbDR_ES2PbgKTJdkjc_rEeM0TxvOUf7HuUNOhrtAVEN1D5uuxE1WSw",
    ;   "e": "AQAB",
    ;   "d": "DjU54mYvHpICXHjc5-JiFqiH8NkUgOG8LL4kwt3DeBp9bP0-5hSJH8vmzwJkeGG9L79EWG4b_bfxgYdeNX7cFFagmWPRFrlxbd64VRYFawZHRJt-2cbzMVI6DL8EK4bu5Ux5qTiV44Jw19hoD9nDzCTfPzSTSGrKD3iLPdnREYaIGDVxcjBv3Tx6rrv3Z2lhHHKhEHb0RRjATcjAVKV9NZhMajJ4l9pqJ3A4IQrCBl95ux6Xm1oXP0i6aR78cjchsCpcMXdP3WMsvHgTlsZT0RZLFHrvkiNHlPiil4G2_eHkwvT__CrcbO6SmI_zCtMmypuHJqcr-Xb7GPJoa64WoQ",
    ;   "p": "8K33pX90XX6PZGiv26wZm7tfvqlqWFT03nUMvOAytqdxhO2HysiPn4W58OaJd1tY4372Qpiv6enmUeI4MidCie-s-d0_B6A0xfhU5EeeaDN0xDOOl8yN-kaaVj9b4HDR3c91OAwKpDJQIeJVZtxoijxl-SRx3u7Vs_7meeSpOfE",
    ;   "q": "7a5KnUs1pTo72A-JquJvIz4Eu794Yh3ftTk_Et-83aE_FVc6Nk-EhfnwYSNpVmM6UKdrAoy5gsCvZPxrq-eR9pEwU8M5UOlki03vWY_nqDBpJSIqwPvGHUB16zvggsPQUyQBfnN3N8XlDi12n88ltvWwEhn1LQOwMUALEfka9_s",
    ;   "dp": "DB9nGuHplY_7Xv5a5UCs5YgxkWPtJFfbIZ1Zr-XHCCY09JIWReOGQG226OhjwixKtOK_OqmAKtMKM9OmKviJRHNbDhbTxumN3u7cL8dftjXpSryiEQlPmWyW94MneI2WNIrvh4wruQuDt8EztgOiDFxwcnUgey8iend7WmZnE7E",
    ;   "dq": "O-bSTUQ4N_UuQezgkF3TDrnBraO67leDGwRbfiE_U0ghQvqh5DA0QSPVzlWDZc9KUitvj8vxsR9o1PW9GS0an17GJEYuetLnkShKK3NWOhBBX6d1yP9rVdH6JhgIJEy_g0Suz7TAFiFc8i7JF8u4QJ05C8bZAMhOLotqftQeVOM",
    ;   "qi": "InfGmkb2jNkPGuNiZ-mU0-ZrOgLza_fLL9ErZ35jUPhGFzdGxJNobklvsNoTd-E2GAU41YkJh24bncMLvJVYxHHA5iF7FBWx1SvpEyKVhhnIcuXGD7N5PbNZzEdmr9C6I7cPVkWO-sUV7zfFukexIcANmsd_oBBGKRoYzP5Tti4"
    ; } 


    CkStringBuilder::ckDispose(sbPem)
    CkPrivateKey::ckDispose(privKey)
    CkJsonObject::ckDispose(json)


    ProcedureReturn
EndProcedure