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// Copyright 2025 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 cosigner_test
import (
"context"
"encoding/json"
"testing"
"time"
"github.com/lestrrat-go/jwx/v2/jwa"
"github.com/lestrrat-go/jwx/v2/jwk"
"github.com/openpubkey/openpubkey/cosigner"
"github.com/openpubkey/openpubkey/discover"
"github.com/openpubkey/openpubkey/pktoken"
"github.com/openpubkey/openpubkey/pktoken/mocks"
"github.com/openpubkey/openpubkey/util"
"github.com/stretchr/testify/require"
)
func TestCosignerVerifier(t *testing.T) {
// Generate the key pair for our cosigner
alg := jwa.ES256
signer, err := util.GenKeyPair(alg)
require.NoError(t, err, "failed to generate key pair")
cos := &cosigner.Cosigner{
Alg: alg,
Signer: signer,
}
pkt, err := mocks.GenerateMockPKToken(t, signer, alg)
require.NoError(t, err)
fakeIssuer := "https://example.com"
kid := "1234"
cosignerClaims := pktoken.CosignerClaims{
Issuer: fakeIssuer,
KeyID: kid,
Algorithm: cos.Alg.String(),
AuthID: "none",
AuthTime: time.Now().Unix(),
IssuedAt: time.Now().Unix(),
Expiration: time.Now().Add(time.Hour).Unix(),
RedirectURI: "none",
Nonce: "test-nonce",
Typ: "COS",
}
cosToken, err := cos.Cosign(pkt, cosignerClaims)
require.NoError(t, err, "failed cosign PK Token")
require.NotNil(t, cosToken, "cosign signature is nil")
err = pkt.AddSignature(cosToken, pktoken.COS)
require.NoError(t, err, "failed to add cosign signature to pk token")
mockPublicKeyFinder := func(ctx context.Context, issuer string) ([]byte, error) {
keySet := jwk.NewSet()
jwkKey, err := jwk.PublicKeyOf(signer)
if err != nil {
return nil, err
}
if err := jwkKey.Set(jwk.AlgorithmKey, alg); err != nil {
return nil, err
}
if err := jwkKey.Set(jwk.KeyIDKey, kid); err != nil {
return nil, err
}
if err := keySet.AddKey(jwkKey); err != nil {
return nil, err
}
return json.MarshalIndent(keySet, "", " ")
}
cosVerifier := cosigner.NewCosignerVerifier(fakeIssuer, cosigner.CosignerVerifierOpts{
DiscoverPublicKey: &discover.PublicKeyFinder{
JwksFunc: mockPublicKeyFinder,
},
})
err = cosVerifier.VerifyCosigner(context.Background(), pkt)
require.NoError(t, err, "failed to verify cosigned pk token")
}
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