Visual Basic 6.0

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. Visual Basic 6.0

Dim success As Long
success = 0

' Imagine we have this JWK:

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

Dim sbJwk As New ChilkatStringBuilder
success = sbJwk.LoadFile("qa_data/jwk/simple_jwk_rsa.json","utf-8")
If (success <> 1) Then
    Debug.Print "Failed to load simple JWK file."
    Exit Sub
End If

' Loading it into a Chilkat public key object is easy:
Dim pubkey As New PublicKey
success = pubkey.LoadFromString(sbJwk.GetAsString())
If (success = 0) Then
    Debug.Print pubkey.LastErrorText
    Exit Sub
End If

Debug.Print "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 New ChilkatStringBuilder
success = sbJwk2.LoadFile("qa_data/jwk/contained_jwk_rsa.json","utf-8")
If (success = 0) Then
    Debug.Print sbJwk2.LastErrorText
    Exit Sub
End If

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

Dim jsonJwk As New ChilkatJsonObject
success = json.ObjectOf2("jwk",jsonJwk)
If (success = 0) Then
    Debug.Print json.LastErrorText
    Exit Sub
End If

Dim pubkey2 As New PublicKey
success = pubkey2.LoadFromString(jsonJwk.Emit())
If (success = 0) Then
    Debug.Print pubkey2.LastErrorText
    Exit Sub
End If

Debug.Print "Contained JWK loaded into public key object."