/
certs.go
139 lines (109 loc) · 3.75 KB
/
certs.go
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package etcd
import (
stdlibx509 "crypto/x509"
"fmt"
"net"
"net/netip"
"time"
"github.com/siderolabs/crypto/x509"
"github.com/siderolabs/gen/xslices"
"github.com/siderolabs/talos/pkg/machinery/resources/network"
)
// CertificateGenerator contains etcd certificate options.
type CertificateGenerator struct {
CA *x509.PEMEncodedCertificateAndKey
NodeAddresses *network.NodeAddress
HostnameStatus *network.HostnameStatus
}
// buildOptions set common certificate options.
func (gen *CertificateGenerator) buildOptions(autoSANs, includeLocalhost bool) []x509.Option {
addresses := gen.NodeAddresses.TypedSpec().IPs()
if includeLocalhost {
addresses = append(addresses, netip.MustParseAddr("127.0.0.1"))
for _, addr := range addresses {
if addr.Is6() {
addresses = append(addresses, netip.MustParseAddr("::1"))
break
}
}
}
hostname := gen.HostnameStatus.TypedSpec().Hostname
dnsNames := gen.HostnameStatus.TypedSpec().DNSNames()
if includeLocalhost {
dnsNames = append(dnsNames, "localhost")
}
result := []x509.Option{
x509.NotAfter(time.Now().Add(87600 * time.Hour)),
x509.KeyUsage(stdlibx509.KeyUsageDigitalSignature | stdlibx509.KeyUsageKeyEncipherment),
}
if autoSANs {
result = append(result,
x509.CommonName(hostname),
x509.DNSNames(dnsNames),
x509.IPAddresses(xslices.Map(addresses, func(addr netip.Addr) net.IP {
return addr.AsSlice()
})),
)
}
return result
}
// GeneratePeerCert generates etcd peer certificate and key from etcd CA.
func (gen *CertificateGenerator) GeneratePeerCert() (*x509.PEMEncodedCertificateAndKey, error) {
opts := gen.buildOptions(true, false)
opts = append(opts,
x509.ExtKeyUsage([]stdlibx509.ExtKeyUsage{
stdlibx509.ExtKeyUsageServerAuth,
stdlibx509.ExtKeyUsageClientAuth,
}),
)
ca, err := x509.NewCertificateAuthorityFromCertificateAndKey(gen.CA)
if err != nil {
return nil, fmt.Errorf("failed loading CA from config: %w", err)
}
keyPair, err := x509.NewKeyPair(ca, opts...)
if err != nil {
return nil, fmt.Errorf("failed generating peer key pair: %w", err)
}
return x509.NewCertificateAndKeyFromKeyPair(keyPair), nil
}
// GenerateServerCert generates server etcd certificate and key from etcd CA.
func (gen *CertificateGenerator) GenerateServerCert() (*x509.PEMEncodedCertificateAndKey, error) {
opts := gen.buildOptions(true, true)
opts = append(opts,
x509.ExtKeyUsage([]stdlibx509.ExtKeyUsage{
stdlibx509.ExtKeyUsageServerAuth,
stdlibx509.ExtKeyUsageClientAuth,
}),
)
ca, err := x509.NewCertificateAuthorityFromCertificateAndKey(gen.CA)
if err != nil {
return nil, fmt.Errorf("failed loading CA from config: %w", err)
}
keyPair, err := x509.NewKeyPair(ca, opts...)
if err != nil {
return nil, fmt.Errorf("failed generating client key pair: %w", err)
}
return x509.NewCertificateAndKeyFromKeyPair(keyPair), nil
}
// GenerateClientCert generates client certificate and key from etcd CA.
func (gen *CertificateGenerator) GenerateClientCert(commonName string) (*x509.PEMEncodedCertificateAndKey, error) {
opts := gen.buildOptions(false, false)
opts = append(opts, x509.CommonName(commonName))
opts = append(opts,
x509.ExtKeyUsage([]stdlibx509.ExtKeyUsage{
stdlibx509.ExtKeyUsageClientAuth,
}),
)
ca, err := x509.NewCertificateAuthorityFromCertificateAndKey(gen.CA)
if err != nil {
return nil, fmt.Errorf("failed loading CA from config: %w", err)
}
keyPair, err := x509.NewKeyPair(ca, opts...)
if err != nil {
return nil, fmt.Errorf("failed generating client key pair: %w", err)
}
return x509.NewCertificateAndKeyFromKeyPair(keyPair), nil
}