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确定后同步将在后台操作,完成时将刷新页面,请耐心等待。
// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016-2017 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package devicestate
import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"strconv"
"gitee.com/mysnapcore/mysnapd/osutil"
)
func generateRSAKey(keyLength int) (*rsa.PrivateKey, error) {
// The temporary directory is created with mode
// 0700 by ioutil.TempDir, see:
// https://github.com/golang/go/blob/master/src/io/ioutil/tempfile.go#L84
tempDir, err := ioutil.TempDir(os.TempDir(), "snapd")
if err != nil {
return nil, err
}
defer os.RemoveAll(tempDir)
rsaKeyFile := filepath.Join(tempDir, "rsa.key")
cmd := exec.Command("ssh-keygen", "-t", "rsa", "-b", strconv.Itoa(keyLength), "-N", "", "-f", rsaKeyFile, "-m", "PEM")
out, err := cmd.CombinedOutput()
if err != nil {
return nil, osutil.OutputErr(out, err)
}
d, err := ioutil.ReadFile(rsaKeyFile)
if err != nil {
return nil, err
}
blk, _ := pem.Decode(d)
if blk == nil {
return nil, errors.New("cannot decode PEM block")
}
key, err := x509.ParsePKCS1PrivateKey(blk.Bytes)
if err != nil {
return nil, err
}
err = key.Validate()
if err != nil {
return nil, err
}
err = os.RemoveAll(tempDir)
if err != nil {
return nil, err
}
return key, err
}
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