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// Copyright 2021 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 ephemeralca
import (
"crypto/rand"
"crypto/x509"
"crypto/x509/pkix"
"time"
"github.com/sigstore/fulcio/pkg/ca"
"github.com/sigstore/fulcio/pkg/ca/baseca"
"github.com/sigstore/sigstore/pkg/cryptoutils"
"github.com/sigstore/sigstore/pkg/signature"
)
type EphemeralCA struct {
baseca.BaseCA
}
func NewEphemeralCA() (*EphemeralCA, error) {
e := &EphemeralCA{}
var err error
signer, _, err := signature.NewDefaultECDSASignerVerifier()
if err != nil {
return nil, err
}
serialNumber, err := cryptoutils.GenerateSerialNumber()
if err != nil {
return nil, err
}
rootCA := &x509.Certificate{
SerialNumber: serialNumber,
Subject: pkix.Name{
Organization: []string{"sigstore"},
Country: []string{"USA"},
Province: []string{"WA"},
Locality: []string{"Kirkland"},
StreetAddress: []string{"767 6th St S"},
PostalCode: []string{"98033"},
},
NotBefore: time.Now(),
NotAfter: time.Now().AddDate(10, 0, 0),
IsCA: true,
KeyUsage: x509.KeyUsageCertSign | x509.KeyUsageCRLSign,
BasicConstraintsValid: true, MaxPathLen: 1,
}
caBytes, err := x509.CreateCertificate(rand.Reader, rootCA, rootCA, signer.Public(), signer)
if err != nil {
return nil, err
}
rootCert, err := x509.ParseCertificate(caBytes)
if err != nil {
return nil, err
}
sc := ca.SignerCerts{Signer: signer, Certs: []*x509.Certificate{rootCert}}
e.SignerWithChain = &sc
return e, nil
}
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