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// Copyright The Notary Project 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 cert
import (
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
"fmt"
"time"
"github.com/notaryproject/notation-core-go/testhelper"
"github.com/notaryproject/notation-go/config"
"github.com/notaryproject/notation-go/dir"
"github.com/notaryproject/notation/cmd/notation/internal/truststore"
"github.com/notaryproject/notation/internal/osutil"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
)
var (
keyDefaultFlag = &pflag.Flag{
Name: "default",
Usage: "mark as default signing key",
}
setKeyDefaultFlag = func(fs *pflag.FlagSet, p *bool) {
fs.BoolVarP(p, keyDefaultFlag.Name, keyDefaultFlag.Shorthand, false, keyDefaultFlag.Usage)
}
)
type certGenerateTestOpts struct {
name string
bits int
isDefault bool
}
func certGenerateTestCommand(opts *certGenerateTestOpts) *cobra.Command {
if opts == nil {
opts = &certGenerateTestOpts{}
}
command := &cobra.Command{
Use: "generate-test [flags] <common_name>",
Short: "Generate a test RSA key and a corresponding self-signed certificate.",
Args: func(cmd *cobra.Command, args []string) error {
if len(args) == 0 {
return errors.New("missing certificate common_name")
}
opts.name = args[0]
return nil
},
Long: `Generate a test RSA key and a corresponding self-signed certificate
Example - Generate a test RSA key and a corresponding self-signed certificate named "wabbit-networks.io":
notation cert generate-test "wabbit-networks.io"
Example - Generate a test RSA key and a corresponding self-signed certificate, set RSA key as a default signing key:
notation cert generate-test --default "wabbit-networks.io"
`,
RunE: func(cmd *cobra.Command, args []string) error {
return generateTestCert(opts)
},
}
command.Flags().IntVarP(&opts.bits, "bits", "b", 2048, "RSA key bits")
setKeyDefaultFlag(command.Flags(), &opts.isDefault)
return command
}
func generateTestCert(opts *certGenerateTestOpts) error {
// initialize
name := opts.name
if !truststore.IsValidFileName(name) {
return errors.New("name needs to follow [a-zA-Z0-9_.-]+ format")
}
// generate RSA private key
bits := opts.bits
fmt.Println("generating RSA Key with", bits, "bits")
key, keyBytes, err := generateTestKey(bits)
if err != nil {
return err
}
rsaCertTuple, certBytes, err := generateSelfSignedCert(key, name)
if err != nil {
return err
}
fmt.Println("generated certificate expiring on", rsaCertTuple.Cert.NotAfter.Format(time.RFC3339))
// write private key
relativeKeyPath, relativeCertPath := dir.LocalKeyPath(name)
configFS := dir.ConfigFS()
keyPath, err := configFS.SysPath(relativeKeyPath)
if err != nil {
return err
}
certPath, err := configFS.SysPath(relativeCertPath)
if err != nil {
return err
}
if err := osutil.WriteFileWithPermission(keyPath, keyBytes, 0600, false); err != nil {
return fmt.Errorf("failed to write key file: %v", err)
}
fmt.Println("wrote key:", keyPath)
// write the self-signed certificate
if err := osutil.WriteFileWithPermission(certPath, certBytes, 0644, false); err != nil {
return fmt.Errorf("failed to write certificate file: %v", err)
}
fmt.Println("wrote certificate:", certPath)
// update signingkeys.json config
exec := func(s *config.SigningKeys) error {
return s.Add(opts.name, keyPath, certPath, opts.isDefault)
}
if err := config.LoadExecSaveSigningKeys(exec); err != nil {
return err
}
// Add to the trust store
if err := truststore.AddCert(certPath, "ca", name, true); err != nil {
return err
}
// write out
fmt.Printf("%s: added to the key list\n", name)
if opts.isDefault {
fmt.Printf("%s: mark as default signing key\n", name)
}
return nil
}
func generateTestKey(bits int) (*rsa.PrivateKey, []byte, error) {
key, err := rsa.GenerateKey(rand.Reader, bits)
if err != nil {
return nil, nil, err
}
keyBytes, err := x509.MarshalPKCS8PrivateKey(key)
if err != nil {
return nil, nil, err
}
keyPEM := pem.EncodeToMemory(&pem.Block{Type: "PRIVATE KEY", Bytes: keyBytes})
return key, keyPEM, nil
}
func generateCertPEM(rsaCertTuple *testhelper.RSACertTuple) []byte {
return pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: rsaCertTuple.Cert.Raw})
}
// generateTestCert generates a self-signed non-CA certificate
func generateSelfSignedCert(privateKey *rsa.PrivateKey, name string) (testhelper.RSACertTuple, []byte, error) {
rsaCertTuple := testhelper.GetRSASelfSignedCertTupleWithPK(privateKey, name)
return rsaCertTuple, generateCertPEM(&rsaCertTuple), nil
}
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