B4X Requires Chilkat v11.0.0+

Load JWK into PublicKey Object

See more JSON Web Signatures (JWS) Examples

Demonstrates how to load a Java Web Key (JWK) into a Chilkat public key object. B4X

Dim success As Boolean = False

'  Imagine we have this JWK:

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

Dim sbJwk As ChilkatStringBuilder
sbJwk.Initialize
success = sbJwk.LoadFile("qa_data/jwk/simple_jwk_rsa.json", "utf-8")
If success <> True Then
    Log("Failed to load simple JWK file.")
    Return
End If


'  Loading it into a Chilkat public key object is easy:
Dim pubkey As ChilkatPublicKey
pubkey.Initialize
success = pubkey.LoadFromString(sbJwk.GetAsString)
If success = False Then
    Log(pubkey.LastErrorText)
    Return
End If


Log("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"
'            }
'  }

Dim sbJwk2 As ChilkatStringBuilder
sbJwk2.Initialize
success = sbJwk2.LoadFile("qa_data/jwk/contained_jwk_rsa.json", "utf-8")
If success = False Then
    Log(sbJwk2.LastErrorText)
    Return
End If


'  Get the "jwk" part of the JSON..
Dim json As ChilkatJsonObject
json.Initialize
json.Load(sbJwk2.GetAsString)

Dim jsonJwk As ChilkatJsonObject
jsonJwk.Initialize
success = json.ObjectOf2("jwk", jsonJwk)
If success = False Then
    Log(json.LastErrorText)
    Return
End If


Dim pubkey2 As ChilkatPublicKey
pubkey2.Initialize
success = pubkey2.LoadFromString(jsonJwk.Emit)
If success = False Then
    Log(pubkey2.LastErrorText)
    Return
End If


Log("Contained JWK loaded into public key object.")