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ssh.go
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ssh.go
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package store
import (
"crypto/x509"
"encoding/pem"
"errors"
"fmt"
"io"
"path/filepath"
"strings"
breverrors "github.com/brevdev/brev-cli/pkg/errors"
"github.com/brevdev/brev-cli/pkg/files"
"github.com/spf13/afero"
)
// !! need something to resolve file path of user ssh
func (f FileStore) GetUserSSHConfig() (string, error) {
home, err := f.UserHomeDir()
if err != nil {
return "", breverrors.WrapAndTrace(err)
}
path, err := files.GetUserSSHConfigPath(home)
if err != nil {
return "", breverrors.WrapAndTrace(err)
}
if path == "" {
return "", errors.New("nil path when getting ssh config")
}
file, err := f.GetOrCreateFile(path)
if err != nil {
return "", breverrors.WrapAndTrace(err)
}
buf := new(strings.Builder)
_, err = io.Copy(buf, file)
if err != nil {
return "", breverrors.WrapAndTrace(err)
}
return buf.String(), nil
}
func (f FileStore) GetUserSSHConfigPath() (string, error) {
home, err := f.UserHomeDir()
if err != nil {
return "", breverrors.WrapAndTrace(err)
}
path, err := files.GetUserSSHConfigPath(home)
if err != nil {
return "", breverrors.WrapAndTrace(err)
}
return path, nil
}
func (f FileStore) GetBrevSSHConfigPath() (string, error) {
home, err := f.UserHomeDir()
if err != nil {
return "", breverrors.WrapAndTrace(err)
}
path := files.GetBrevSSHConfigPath(home)
return path, nil
}
func (f FileStore) WriteUserSSHConfig(config string) error {
home, err := f.UserHomeDir()
if err != nil {
return breverrors.WrapAndTrace(err)
}
csp, err := files.GetUserSSHConfigPath(home)
if err != nil {
return breverrors.WrapAndTrace(err)
}
err = afero.WriteFile(f.fs, csp, []byte(config), 0o644)
if err != nil {
return breverrors.WrapAndTrace(err)
}
return nil
}
func (f FileStore) WriteBrevSSHConfig(config string) error {
home, err := f.UserHomeDir()
if err != nil {
return breverrors.WrapAndTrace(err)
}
bsp := files.GetBrevSSHConfigPath(home)
err = f.fs.MkdirAll(filepath.Dir(bsp), 0o755)
if err != nil {
return breverrors.WrapAndTrace(err)
}
err = afero.WriteFile(f.fs, bsp, []byte(config), 0o644)
if err != nil {
return breverrors.WrapAndTrace(err)
}
return nil
}
func (f FileStore) CreateNewSSHConfigBackup() error {
home, err := f.UserHomeDir()
if err != nil {
return breverrors.WrapAndTrace(err)
}
backupFilePath := files.GetNewBackupSSHConfigFilePath(home)
if err != nil {
return breverrors.WrapAndTrace(err)
}
csp, err := files.GetUserSSHConfigPath(home)
if err != nil {
return breverrors.WrapAndTrace(err)
}
file, err := f.fs.Open(csp)
if err != nil {
return breverrors.WrapAndTrace(err)
}
buf := new(strings.Builder)
_, err = io.Copy(buf, file)
if err != nil {
return breverrors.WrapAndTrace(err)
}
err = afero.WriteFile(f.fs, backupFilePath, []byte(buf.String()), 0o644)
if err != nil {
return breverrors.WrapAndTrace(err)
}
fmt.Printf("Editing ssh config, backed up at path %s\n", backupFilePath)
return nil
}
func (f FileStore) WritePrivateKey(pem string) error {
home, err2 := f.UserHomeDir()
if err2 != nil {
return breverrors.WrapAndTrace(err2)
}
err2 = files.WriteSSHPrivateKey(f.fs, pem, home)
if err2 != nil {
return breverrors.WrapAndTrace(err2)
}
return nil
}
func (f FileStore) GetPrivateKeyPath() (string, error) {
home, err := f.UserHomeDir()
if err != nil {
return "", breverrors.WrapAndTrace(err)
}
path := files.GetSSHPrivateKeyPath(home)
return path, nil
}
func VerifyPrivateKey(key []byte) error {
block, rest := pem.Decode(key)
if block == nil || block.Type != "RSA PRIVATE KEY" {
return errors.New("failed to decode PEM block")
}
if len(rest) > 0 {
return errors.New("extra data in key")
}
_, err := x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
return breverrors.WrapAndTrace(err)
}
return nil
}