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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 cosigner
import (
"crypto"
"encoding/json"
"github.com/lestrrat-go/jwx/v2/jwa"
"github.com/openpubkey/openpubkey/pktoken"
)
type Cosigner struct {
Alg jwa.KeyAlgorithm
Signer crypto.Signer
}
func (c *Cosigner) Cosign(pkt *pktoken.PKToken, cosClaims pktoken.CosignerClaims) ([]byte, error) {
jsonBytes, err := json.Marshal(cosClaims)
if err != nil {
return nil, err
}
var headers map[string]any
if err := json.Unmarshal(jsonBytes, &headers); err != nil {
return nil, err
}
return pkt.SignToken(c.Signer, c.Alg, headers)
}
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