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serve sftp: add support for multiple host keys by repeating --key flag
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@ -206,34 +206,36 @@ func (s *server) serve() (err error) {
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}
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// Load the private key, from the cache if not explicitly configured
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keyPath := s.opt.Key
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keyPaths := s.opt.HostKeys
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cachePath := filepath.Join(config.CacheDir, "serve-sftp")
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if keyPath == "" {
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keyPath = filepath.Join(cachePath, "id_rsa")
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if len(keyPaths) == 0 {
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keyPaths = []string{filepath.Join(cachePath, "id_rsa")}
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}
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private, err := loadPrivateKey(keyPath)
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if err != nil && s.opt.Key == "" {
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fs.Debugf(nil, "Failed to load %q: %v", keyPath, err)
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// If loading a cached key failed, make the keys and retry
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err = os.MkdirAll(cachePath, 0700)
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if err != nil {
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return errors.Wrap(err, "failed to create cache path")
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for _, keyPath := range keyPaths {
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private, err := loadPrivateKey(keyPath)
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if err != nil && len(s.opt.HostKeys) == 0 {
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fs.Debugf(nil, "Failed to load %q: %v", keyPath, err)
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// If loading a cached key failed, make the keys and retry
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err = os.MkdirAll(cachePath, 0700)
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if err != nil {
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return errors.Wrap(err, "failed to create cache path")
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}
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const bits = 2048
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fs.Logf(nil, "Generating %d bit key pair at %q", bits, keyPath)
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err = makeSSHKeyPair(bits, keyPath+".pub", keyPath)
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if err != nil {
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return errors.Wrap(err, "failed to create SSH key pair")
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}
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// reload the new keys
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private, err = loadPrivateKey(keyPath)
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}
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const bits = 2048
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fs.Logf(nil, "Generating %d bit key pair at %q", bits, keyPath)
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err = makeSSHKeyPair(bits, keyPath+".pub", keyPath)
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if err != nil {
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return errors.Wrap(err, "failed to create SSH key pair")
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return err
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}
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// reload the new keys
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private, err = loadPrivateKey(keyPath)
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}
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if err != nil {
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return err
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}
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fs.Debugf(nil, "Loaded private key from %q", keyPath)
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fs.Debugf(nil, "Loaded private key from %q", keyPath)
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s.config.AddHostKey(private)
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s.config.AddHostKey(private)
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}
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// Once a ServerConfig has been configured, connections can be
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// accepted.
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@ -19,12 +19,12 @@ import (
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// Options contains options for the http Server
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type Options struct {
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ListenAddr string // Port to listen on
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Key string // Path to private host key
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AuthorizedKeys string // Path to authorized keys file
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User string // single username
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Pass string // password for user
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NoAuth bool // allow no authentication on connections
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ListenAddr string // Port to listen on
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HostKeys []string // Paths to private host keys
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AuthorizedKeys string // Path to authorized keys file
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User string // single username
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Pass string // password for user
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NoAuth bool // allow no authentication on connections
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}
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// DefaultOpt is the default values used for Options
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@ -40,7 +40,7 @@ var Opt = DefaultOpt
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func AddFlags(flagSet *pflag.FlagSet, Opt *Options) {
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rc.AddOption("sftp", &Opt)
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flags.StringVarP(flagSet, &Opt.ListenAddr, "addr", "", Opt.ListenAddr, "IPaddress:Port or :Port to bind server to.")
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flags.StringVarP(flagSet, &Opt.Key, "key", "", Opt.Key, "SSH private host key file (leave blank to auto generate)")
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flags.StringArrayVarP(flagSet, &Opt.HostKeys, "key", "", Opt.HostKeys, "SSH private host key file (Can be multi-valued, leave blank to auto generate)")
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flags.StringVarP(flagSet, &Opt.AuthorizedKeys, "authorized-keys", "", Opt.AuthorizedKeys, "Authorized keys file")
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flags.StringVarP(flagSet, &Opt.User, "user", "", Opt.User, "User name for authentication.")
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flags.StringVarP(flagSet, &Opt.Pass, "pass", "", Opt.Pass, "Password for authentication.")
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