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// Copyright 2020 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package task
import (
"context"
"encoding/pem"
"fmt"
"net"
"path/filepath"
"github.com/pingcap/errors"
"github.com/pingcap/tiup/pkg/cluster/ctxt"
"github.com/pingcap/tiup/pkg/cluster/spec"
"github.com/pingcap/tiup/pkg/crypto"
"github.com/pingcap/tiup/pkg/meta"
"github.com/pingcap/tiup/pkg/utils"
)
// TLSCert generates a certificate for instance
type TLSCert struct {
comp string
role string
host string
port int
ca *crypto.CertificateAuthority
paths meta.DirPaths
}
// Execute implements the Task interface
func (c *TLSCert) Execute(ctx context.Context) error {
privKey, err := crypto.NewKeyPair(crypto.KeyTypeRSA, crypto.KeySchemeRSASSAPSSSHA256)
if err != nil {
return err
}
// Add localhost and 127.0.0.1 to the trust list,
// then it is easy for some scripts to request a local interface directly
hosts := []string{"localhost"}
ips := []string{"127.0.0.1"}
if host := c.host; net.ParseIP(host) != nil && host != "127.0.0.1" {
ips = append(ips, host)
} else if host != "localhost" {
hosts = append(hosts, host)
}
csr, err := privKey.CSR(c.role, c.comp, hosts, ips)
if err != nil {
return err
}
cert, err := c.ca.Sign(csr)
if err != nil {
return err
}
// make sure the cache dir exist
if err := utils.MkdirAll(c.paths.Cache, 0755); err != nil {
return err
}
// save cert to cache dir
keyFileName := fmt.Sprintf("%s-%s-%d.pem", c.role, c.host, c.port)
certFileName := fmt.Sprintf("%s-%s-%d.crt", c.role, c.host, c.port)
keyFile := filepath.Join(
c.paths.Cache,
keyFileName,
)
certFile := filepath.Join(
c.paths.Cache,
certFileName,
)
caFile := filepath.Join(c.paths.Cache, spec.TLSCACert)
if err := utils.SaveFileWithBackup(keyFile, privKey.Pem(), ""); err != nil {
return err
}
if err := utils.SaveFileWithBackup(certFile, pem.EncodeToMemory(&pem.Block{
Type: "CERTIFICATE",
Bytes: cert,
}), ""); err != nil {
return err
}
if err := utils.SaveFileWithBackup(caFile, pem.EncodeToMemory(&pem.Block{
Type: "CERTIFICATE",
Bytes: c.ca.Cert.Raw,
}), ""); err != nil {
return err
}
// transfer file to remote
e, ok := ctxt.GetInner(ctx).GetExecutor(c.host)
if !ok {
return ErrNoExecutor
}
if err := e.Transfer(ctx, caFile,
filepath.Join(c.paths.Deploy, spec.TLSCertKeyDir, spec.TLSCACert),
false, /* download */
0, /* limit */
false /* compress */); err != nil {
return errors.Annotate(err, "failed to transfer CA cert to server")
}
if err := e.Transfer(ctx, keyFile,
filepath.Join(c.paths.Deploy, spec.TLSCertKeyDir, fmt.Sprintf("%s.pem", c.role)),
false, /* download */
0, /* limit */
false /* compress */); err != nil {
return errors.Annotate(err, "failed to transfer TLS private key to server")
}
if err := e.Transfer(ctx, certFile,
filepath.Join(c.paths.Deploy, spec.TLSCertKeyDir, fmt.Sprintf("%s.crt", c.role)),
false, /* download */
0, /* limit */
false /* compress */); err != nil {
return errors.Annotate(err, "failed to transfer TLS cert to server")
}
return nil
}
// Rollback implements the Task interface
func (c *TLSCert) Rollback(ctx context.Context) error {
return ErrUnsupportedRollback
}
// String implements the fmt.Stringer interface
func (c *TLSCert) String() string {
return fmt.Sprintf("TLSCert: host=%s role=%s cn=%s", c.host, c.role, c.comp)
}
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