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# frozen_string_literal: true
RSpec.describe JWT::X5cKeyFinder do
let(:root_key) { test_pkey('rsa-2048-private.pem') }
let(:root_dn) { OpenSSL::X509::Name.parse('/DC=org/DC=fake-ca/CN=Fake CA') }
let(:root_certificate) { generate_root_cert(root_dn, root_key) }
let(:leaf_key) { generate_key }
let(:leaf_dn) { OpenSSL::X509::Name.parse('/DC=org/DC=fake/CN=Fake') }
let(:leaf_serial) { 2 }
let(:leaf_not_after) { Time.now + 3600 }
let(:leaf_signing_key) { root_key }
let(:leaf_certificate) do
cert = generate_cert(
leaf_dn,
leaf_key.public_key,
leaf_serial,
issuer: root_certificate,
not_after: leaf_not_after
)
ef = OpenSSL::X509::ExtensionFactory.new
ef.config = OpenSSL::Config.parse(leaf_cdp)
ef.subject_certificate = cert
cert.add_extension(ef.create_extension('crlDistributionPoints', '@crlDistPts'))
cert.sign(leaf_signing_key, 'sha256')
cert
end
let(:leaf_cdp) { <<-_CNF_ }
[crlDistPts]
URI.1 = http://www.example.com/crl
_CNF_
let(:crl) { issue_crl([], issuer: root_certificate, issuer_key: root_key) }
let(:x5c_header) { [Base64.strict_encode64(leaf_certificate.to_der)] }
subject(:keyfinder) { described_class.new([root_certificate], [crl]).from(x5c_header) }
it 'returns the public key from a certificate that is signed by trusted roots and not revoked' do
expect(keyfinder).to be_a(OpenSSL::PKey::RSA)
expect(keyfinder.public_key.to_der).to eq(leaf_certificate.public_key.to_der)
end
context 'already parsed certificates' do
let(:x5c_header) { [leaf_certificate] }
it 'returns the public key from a certificate that is signed by trusted roots and not revoked' do
expect(keyfinder).to be_a(OpenSSL::PKey::RSA)
expect(keyfinder.public_key.to_der).to eq(leaf_certificate.public_key.to_der)
end
end
context '::JWT.decode' do
let(:token_payload) { { 'data' => 'something' } }
let(:encoded_token) { JWT.encode(token_payload, leaf_key, 'RS256', { 'x5c' => x5c_header }) }
let(:decoded_payload) do
JWT.decode(encoded_token, nil, true, algorithms: ['RS256'], x5c: { root_certificates: [root_certificate], crls: [crl] }).first
end
it 'returns the encoded payload after successful certificate path verification' do
expect(decoded_payload).to eq(token_payload)
end
end
context 'certificate' do
context 'expired' do
let(:leaf_not_after) { Time.now - 3600 }
it 'raises an error' do
error = 'Certificate verification failed: certificate has expired. Certificate subject: /DC=org/DC=fake/CN=Fake.'
expect { keyfinder }.to raise_error(JWT::VerificationError, error)
end
end
context 'signature could not be verified with the given trusted roots' do
let(:leaf_signing_key) { generate_key }
it 'raises an error' do
error = 'Certificate verification failed: certificate signature failure. Certificate subject: /DC=org/DC=fake/CN=Fake.'
expect { keyfinder }.to raise_error(JWT::VerificationError, error)
end
end
context 'could not be chained to a trusted root certificate' do
context 'given an array' do
subject(:keyfinder) { described_class.new([], [crl]).from(x5c_header) }
it 'raises a verification error' do
error = 'Certificate verification failed: unable to get local issuer certificate. Certificate subject: /DC=org/DC=fake/CN=Fake.'
expect { keyfinder }.to raise_error(JWT::VerificationError, error)
end
end
context 'given nil' do
subject(:keyfinder) { described_class.new(nil, [crl]).from(x5c_header) }
it 'raises a decode error' do
error = 'Root certificates must be specified'
expect { keyfinder }.to raise_error(ArgumentError, error)
end
end
end
context 'revoked' do
let(:revocation) { [leaf_serial, Time.now - 60, 1] }
let(:crl) { issue_crl([revocation], issuer: root_certificate, issuer_key: root_key) }
it 'raises an error' do
error = 'Certificate verification failed: certificate revoked. Certificate subject: /DC=org/DC=fake/CN=Fake.'
expect { keyfinder }.to raise_error(JWT::VerificationError, error)
end
end
end
context 'CRL' do
context 'expired' do
let(:next_up) { Time.now - 60 }
let(:crl) { issue_crl([], next_up: next_up, issuer: root_certificate, issuer_key: root_key) }
it 'raises an error' do
error = 'Certificate verification failed: CRL has expired. Certificate subject: /DC=org/DC=fake/CN=Fake.'
expect { keyfinder }.to raise_error(JWT::VerificationError, error)
end
end
context 'signature could not be verified with the given trusted roots' do
let(:crl) { issue_crl([], issuer: root_certificate, issuer_key: generate_key) }
it 'raises an error' do
error = 'Certificate verification failed: CRL signature failure. Certificate subject: /DC=org/DC=fake/CN=Fake.'
expect { keyfinder }.to raise_error(JWT::VerificationError, error)
end
end
context 'not given' do
subject(:keyfinder) { described_class.new([root_certificate], nil).from(x5c_header) }
it 'raises an error' do
error = 'Certificate verification failed: unable to get certificate CRL. Certificate subject: /DC=org/DC=fake/CN=Fake.'
expect { keyfinder }.to raise_error(JWT::VerificationError, error)
end
end
end
private
def generate_key
OpenSSL::PKey::RSA.new(2048)
end
def generate_root_cert(root_dn, root_key)
cert = generate_cert(root_dn, root_key, 1)
ef = OpenSSL::X509::ExtensionFactory.new
cert.add_extension(ef.create_extension('basicConstraints', 'CA:TRUE', true))
cert.sign(root_key, 'sha256')
cert
end
def generate_cert(subject, key, serial, issuer: nil, not_after: nil)
cert = OpenSSL::X509::Certificate.new
issuer ||= cert
cert.version = 2
cert.serial = serial
cert.subject = subject
cert.issuer = issuer.subject
cert.public_key = key
now = Time.now
cert.not_before = now - 3600
cert.not_after = not_after || (now + 3600)
cert
end
def issue_crl(revocations, issuer:, issuer_key:, next_up: nil)
crl = OpenSSL::X509::CRL.new
crl.issuer = issuer.subject
crl.version = 1
now = Time.now
crl.last_update = now - 3600
crl.next_update = next_up || (now + 3600)
revocations.each do |rserial, time, reason_code|
revoked = build_revoked(rserial, time, reason_code)
crl.add_revoked(revoked)
end
crlnum = OpenSSL::ASN1::Integer(1)
crl.add_extension(OpenSSL::X509::Extension.new('crlNumber', crlnum))
crl.sign(issuer_key, 'sha256')
crl
end
def build_revoked(rserial, time, reason_code)
revoked = OpenSSL::X509::Revoked.new
revoked.serial = rserial
revoked.time = time
enum = OpenSSL::ASN1::Enumerated(reason_code)
ext = OpenSSL::X509::Extension.new('CRLReason', enum)
revoked.add_extension(ext)
revoked
end
end
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