(Ruby) 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 Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

#  Imagine we have this JWK:

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

sbJwk = Chilkat::CkStringBuilder.new()
success = sbJwk.LoadFile("qa_data/jwk/simple_jwk_rsa.json","utf-8")
if (success != true)
    print "Failed to load simple JWK file." + "\n";
    exit
end

#  Loading it into a Chilkat public key object is easy:
pubkey = Chilkat::CkPublicKey.new()
success = pubkey.LoadFromString(sbJwk.getAsString())
if (success != true)
    print pubkey.lastErrorText() + "\n";
    exit
end

print "Simple JWK loaded into public key object." + "\n";

#  ----------------------------------------------------------------------------------------------------------
#  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 = Chilkat::CkStringBuilder.new()
success = sbJwk2.LoadFile("qa_data/jwk/contained_jwk_rsa.json","utf-8")
if (success != true)
    print "Failed to load JWK file." + "\n";
    exit
end

#  Get the "jwk" part of the JSON..
json = Chilkat::CkJsonObject.new()
json.Load(sbJwk2.getAsString())

# jsonJwk is a CkJsonObject
jsonJwk = json.ObjectOf("jwk")
if (json.get_LastMethodSuccess() != true)
    print "No jwk member exists." + "\n";
    exit
end

pubkey2 = Chilkat::CkPublicKey.new()
success = pubkey2.LoadFromString(jsonJwk.emit())
if (success != true)
    print pubkey2.lastErrorText() + "\n";
    exit
end

print "Contained JWK loaded into public key object." + "\n";