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// Copyright 2024 OpenPubkey
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0
package cert
import (
"context"
"crypto/x509"
"encoding/json"
"encoding/pem"
"testing"
"github.com/lestrrat-go/jwx/v2/jwa"
"github.com/openpubkey/openpubkey/client"
"github.com/openpubkey/openpubkey/providers"
"github.com/openpubkey/openpubkey/util"
"github.com/stretchr/testify/require"
)
func TestCreateX509Cert(t *testing.T) {
alg := jwa.ES256
// generate pktoken
signer, err := util.GenKeyPair(alg)
require.NoError(t, err)
providerOpts := providers.DefaultMockProviderOpts()
providerOpts.GQSign = true
op, _, _, err := providers.NewMockProvider(providerOpts)
require.NoError(t, err)
opkClient, err := client.New(op, client.WithSigner(signer, alg))
require.NoError(t, err)
pkToken, err := opkClient.Auth(context.Background())
require.NoError(t, err)
// create x509 cert from pk token
cert, err := CreateX509Cert(pkToken, signer)
require.NoError(t, err)
p, _ := pem.Decode(cert)
result, err := x509.ParseCertificate(p.Bytes)
require.NoError(t, err)
// test cert SubjectKeyId field contains PK token
pkTokenJSON, err := json.Marshal(pkToken)
require.NoError(t, err)
require.Equal(t, string(pkTokenJSON), string(result.SubjectKeyId),
"certificate subject key id does not match PK token")
// test cert RawSubjectPublicKeyInfo field contains ephemeral public key
ecPub, err := x509.MarshalPKIXPublicKey(signer.Public())
require.NoError(t, err)
require.Equal(t, string(ecPub), string(result.RawSubjectPublicKeyInfo),
"certificate raw subject public key info does not match ephemeral public key")
// test cert common name == pktoken sub claim
var payload struct {
Subject string `json:"sub"`
}
err = json.Unmarshal(pkToken.Payload, &payload)
require.NoError(t, err)
require.Equal(t, payload.Subject, result.Subject.CommonName, "cert common name does not equal pk token sub claim")
}
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