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// Copyright 2022 The Sigstore Authors.
//
// 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.
//
package kmsca
import (
"context"
"crypto"
"crypto/x509"
"github.com/sigstore/fulcio/pkg/ca"
"github.com/sigstore/fulcio/pkg/ca/baseca"
"github.com/sigstore/sigstore/pkg/signature"
"github.com/sigstore/sigstore/pkg/signature/kms"
// Register the provider-specific plugins
_ "github.com/sigstore/sigstore/pkg/signature/kms/aws"
_ "github.com/sigstore/sigstore/pkg/signature/kms/azure"
_ "github.com/sigstore/sigstore/pkg/signature/kms/gcp"
_ "github.com/sigstore/sigstore/pkg/signature/kms/hashivault"
)
type kmsCA struct {
baseca.BaseCA
}
func NewKMSCA(ctx context.Context, kmsKey string, certs []*x509.Certificate, opts ...signature.RPCOption) (ca.CertificateAuthority, error) {
var ica kmsCA
kmsSigner, err := kms.Get(ctx, kmsKey, crypto.SHA256, opts...)
if err != nil {
return nil, err
}
signer, _, err := kmsSigner.CryptoSigner(ctx, func(_ error) {})
if err != nil {
return nil, err
}
sc := ca.SignerCerts{}
ica.SignerWithChain = &sc
sc.Signer = signer
sc.Certs = certs
if err := ca.VerifyCertChain(sc.Certs, sc.Signer); err != nil {
return nil, err
}
return &ica, nil
}
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