(PureBasic) Load JWK into PublicKey Object

Demonstrates how to load a Java Web Key (JWK) into a Chilkat public key object.

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

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkStringBuilder.pb"
IncludeFile "CkJsonObject.pb"
IncludeFile "CkPublicKey.pb"

Procedure ChilkatExample()

    ;  Imagine we have this JWK:

    ;  {
    ;  "kty":"RSA",
    ;  "kid":"bilbo.baggins@hobbiton.example",
    ;  "use":"sig",
    ;  "n":"26381066103266289976070039679240841999340706859156341823971393693544846472963839705790075117105560154606562987481050889935247188300178764426769543782451174831475924241862817098997865881169498995546309260357488285676768114714548754913374731868063116787903918383610614912211576698081222844057810710088656983077876282582286966085572172471849443305250452393766960762340311496052418952315081937000716222751229644449475751932222180738210988190709824209639002026650048655399108647971010890335494074025258268035713167380057822555485524738518699437692145859633592396626258745090144803752145540471688039673495588314804430463791",
    ;  "e":"65537"
    ;  }
    ; 

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

    success.i = CkStringBuilder::ckLoadFile(sbJwk,"qa_data/jwk/simple_jwk_rsa.json","utf-8")
    If success <> 1
        Debug "Failed to load simple JWK file."
        CkStringBuilder::ckDispose(sbJwk)
        ProcedureReturn
    EndIf

    ;  Loading it into a Chilkat public key object is easy:
    pubkey.i = CkPublicKey::ckCreate()
    If pubkey.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkPublicKey::ckLoadFromString(pubkey,CkStringBuilder::ckGetAsString(sbJwk))
    If success <> 1
        Debug CkPublicKey::ckLastErrorText(pubkey)
        CkStringBuilder::ckDispose(sbJwk)
        CkPublicKey::ckDispose(pubkey)
        ProcedureReturn
    EndIf

    Debug "Simple JWK loaded into public key object."

    ;  ----------------------------------------------------------------------------------------------------------
    ;  Demonstrate how to load a JWK that is contained within JSON into a public key object.

    ;  {
    ;    "alg":"RS256",
    ;    "jwk":  {
    ;            "kty":"RSA",
    ;            "kid":"bilbo.baggins@hobbiton.example",
    ;            "use":"sig",
    ;            "n":"26381066103266289976070039679240841999340706859156341823971393693544846472963839705790075117105560154606562987481050889935247188300178764426769543782451174831475924241862817098997865881169498995546309260357488285676768114714548754913374731868063116787903918383610614912211576698081222844057810710088656983077876282582286966085572172471849443305250452393766960762340311496052418952315081937000716222751229644449475751932222180738210988190709824209639002026650048655399108647971010890335494074025258268035713167380057822555485524738518699437692145859633592396626258745090144803752145540471688039673495588314804430463791",
    ;            "e":"65537"
    ;            }
    ;  }

    sbJwk2.i = CkStringBuilder::ckCreate()
    If sbJwk2.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkStringBuilder::ckLoadFile(sbJwk2,"qa_data/jwk/contained_jwk_rsa.json","utf-8")
    If success <> 1
        Debug "Failed to load JWK file."
        CkStringBuilder::ckDispose(sbJwk)
        CkPublicKey::ckDispose(pubkey)
        CkStringBuilder::ckDispose(sbJwk2)
        ProcedureReturn
    EndIf

    ;  Get the "jwk" part of the JSON..
    json.i = CkJsonObject::ckCreate()
    If json.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckLoad(json,CkStringBuilder::ckGetAsString(sbJwk2))

    jsonJwk.i = CkJsonObject::ckObjectOf(json,"jwk")
    If CkJsonObject::ckLastMethodSuccess(json) <> 1
        Debug "No jwk member exists."
        CkStringBuilder::ckDispose(sbJwk)
        CkPublicKey::ckDispose(pubkey)
        CkStringBuilder::ckDispose(sbJwk2)
        CkJsonObject::ckDispose(json)
        ProcedureReturn
    EndIf

    pubkey2.i = CkPublicKey::ckCreate()
    If pubkey2.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkPublicKey::ckLoadFromString(pubkey2,CkJsonObject::ckEmit(jsonJwk))
    If success <> 1
        Debug CkPublicKey::ckLastErrorText(pubkey2)
        CkStringBuilder::ckDispose(sbJwk)
        CkPublicKey::ckDispose(pubkey)
        CkStringBuilder::ckDispose(sbJwk2)
        CkJsonObject::ckDispose(json)
        CkPublicKey::ckDispose(pubkey2)
        ProcedureReturn
    EndIf

    Debug "Contained JWK loaded into public key object."

    CkJsonObject::ckDispose(jsonJwk)



    CkStringBuilder::ckDispose(sbJwk)
    CkPublicKey::ckDispose(pubkey)
    CkStringBuilder::ckDispose(sbJwk2)
    CkJsonObject::ckDispose(json)
    CkPublicKey::ckDispose(pubkey2)


    ProcedureReturn
EndProcedure