Exemple #1
0
// runSSHKeyImport uses ssh-import-id to find the ssh keys for the specified key ids.
func runSSHKeyImport(keyIds []string) map[string][]importedSSHKey {
	importResults := make(map[string][]importedSSHKey, len(keyIds))
	for _, keyId := range keyIds {
		keyInfo := []importedSSHKey{}
		output, err := RunSSHImportId(keyId)
		if err != nil {
			keyInfo = append(keyInfo, importedSSHKey{err: err})
			continue
		}
		lines := strings.Split(output, "\n")
		hasKey := false
		for _, line := range lines {
			if !strings.HasPrefix(line, "ssh-") {
				continue
			}
			hasKey = true
			// ignore key comment (e.g., [email protected])
			fingerprint, _, err := ssh.KeyFingerprint(line)
			keyInfo = append(keyInfo, importedSSHKey{
				key:         line,
				fingerprint: fingerprint,
				err:         errors.Annotatef(err, "invalid ssh key for %s", keyId),
			})
		}
		if !hasKey {
			keyInfo = append(keyInfo, importedSSHKey{
				err: errors.Errorf("invalid ssh key id: %s", keyId),
			})
		}
		importResults[keyId] = keyInfo
	}
	return importResults
}
Exemple #2
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// currentKeyDataForDelete gathers data used when deleting ssh keys.
func (api *KeyManagerAPI) currentKeyDataForDelete() (
	keys map[string]string, invalidKeys []string, comments map[string]string, err error) {

	cfg, err := api.state.EnvironConfig()
	if err != nil {
		return nil, nil, nil, fmt.Errorf("reading current key data: %v", err)
	}
	// For now, authorised keys are global, common to all users.
	existingSSHKeys := ssh.SplitAuthorisedKeys(cfg.AuthorizedKeys())

	// Build up a map of keys indexed by fingerprint, and fingerprints indexed by comment
	// so we can easily get the key represented by each keyId, which may be either a fingerprint
	// or comment.
	keys = make(map[string]string)
	comments = make(map[string]string)
	for _, key := range existingSSHKeys {
		fingerprint, comment, err := ssh.KeyFingerprint(key)
		if err != nil {
			logger.Debugf("keeping unrecognised existing ssh key %q: %v", key, err)
			invalidKeys = append(invalidKeys, key)
			continue
		}
		keys[fingerprint] = key
		if comment != "" {
			comments[comment] = fingerprint
		}
	}
	return keys, invalidKeys, comments, nil
}
Exemple #3
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// currentKeyDataForDelete gathers data used when deleting ssh keys.
func (api *KeyManagerAPI) currentKeyDataForDelete() (
	currentKeys []string, byFingerprint map[string]string, byComment map[string]string, err error) {

	cfg, err := api.state.ModelConfig()
	if err != nil {
		return nil, nil, nil, fmt.Errorf("reading current key data: %v", err)
	}
	// For now, authorised keys are global, common to all users.
	currentKeys = ssh.SplitAuthorisedKeys(cfg.AuthorizedKeys())

	// Make two maps that index keys by fingerprint and by comment for fast
	// lookup of keys to delete which may be given as either.
	byFingerprint = make(map[string]string)
	byComment = make(map[string]string)
	for _, key := range currentKeys {
		fingerprint, comment, err := ssh.KeyFingerprint(key)
		if err != nil {
			logger.Debugf("keeping unrecognised existing ssh key %q: %v", key, err)
			continue
		}
		byFingerprint[fingerprint] = key
		if comment != "" {
			byComment[comment] = key
		}
	}
	return currentKeys, byFingerprint, byComment, nil
}
func (s *FingerprintSuite) TestKeyFingerprint(c *gc.C) {
	keys := []sshtesting.SSHKey{
		sshtesting.ValidKeyOne,
		sshtesting.ValidKeyTwo,
		sshtesting.ValidKeyThree,
	}
	for _, k := range keys {
		fingerprint, _, err := ssh.KeyFingerprint(k.Key)
		c.Assert(err, jc.ErrorIsNil)
		c.Assert(fingerprint, gc.Equals, k.Fingerprint)
	}
}
Exemple #5
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// currentKeyDataForAdd gathers data used when adding ssh keys.
func (api *KeyManagerAPI) currentKeyDataForAdd() (keys []string, fingerprints set.Strings, err error) {
	fingerprints = make(set.Strings)
	cfg, err := api.state.EnvironConfig()
	if err != nil {
		return nil, nil, fmt.Errorf("reading current key data: %v", err)
	}
	keys = ssh.SplitAuthorisedKeys(cfg.AuthorizedKeys())
	for _, key := range keys {
		fingerprint, _, err := ssh.KeyFingerprint(key)
		if err != nil {
			logger.Warningf("ignoring invalid ssh key %q: %v", key, err)
		}
		fingerprints.Add(fingerprint)
	}
	return keys, fingerprints, nil
}
Exemple #6
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func parseKeys(keys []string, mode ssh.ListMode) (keyInfo []string) {
	for _, key := range keys {
		fingerprint, comment, err := ssh.KeyFingerprint(key)
		if err != nil {
			keyInfo = append(keyInfo, fmt.Sprintf("Invalid key: %v", key))
		} else {
			if mode == ssh.FullKeys {
				keyInfo = append(keyInfo, key)
			} else {
				shortKey := fingerprint
				if comment != "" {
					shortKey += fmt.Sprintf(" (%s)", comment)
				}
				keyInfo = append(keyInfo, shortKey)
			}
		}
	}
	return keyInfo
}
Exemple #7
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// SetUp is defined on the worker.NotifyWatchHandler interface.
func (kw *keyupdaterWorker) SetUp() (watcher.NotifyWatcher, error) {
	// Record the keys Juju knows about.
	jujuKeys, err := kw.st.AuthorisedKeys(kw.tag)
	if err != nil {
		err = errors.Annotatef(err, "reading Juju ssh keys for %q", kw.tag)
		logger.Infof(err.Error())
		return nil, err
	}
	kw.jujuKeys = set.NewStrings(jujuKeys...)

	// Read the keys currently in ~/.ssh/authorised_keys.
	sshKeys, err := ssh.ListKeys(SSHUser, ssh.FullKeys)
	if err != nil {
		err = errors.Annotatef(err, "reading ssh authorized keys for %q", kw.tag)
		logger.Infof(err.Error())
		return nil, err
	}
	// Record any keys not added by Juju.
	for _, key := range sshKeys {
		_, comment, err := ssh.KeyFingerprint(key)
		// Also record keys which we cannot parse.
		if err != nil || !strings.HasPrefix(comment, ssh.JujuCommentPrefix) {
			kw.nonJujuKeys = append(kw.nonJujuKeys, key)
		}
	}
	// Write out the ssh authorised keys file to match the current state of the world.
	if err := kw.writeSSHKeys(jujuKeys); err != nil {
		err = errors.Annotate(err, "adding current Juju keys to ssh authorised keys")
		logger.Infof(err.Error())
		return nil, err
	}

	w, err := kw.st.WatchAuthorisedKeys(kw.tag)
	if err != nil {
		err = errors.Annotate(err, "starting key updater worker")
		logger.Infof(err.Error())
		return nil, err
	}
	logger.Infof("%q key updater worker started", kw.tag)
	return w, nil
}
Exemple #8
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// AddKeys adds new authorised ssh keys for the specified user.
func (api *KeyManagerAPI) AddKeys(arg params.ModifyUserSSHKeys) (params.ErrorResults, error) {
	if err := api.check.ChangeAllowed(); err != nil {
		return params.ErrorResults{}, errors.Trace(err)
	}
	result := params.ErrorResults{
		Results: make([]params.ErrorResult, len(arg.Keys)),
	}
	if len(arg.Keys) == 0 {
		return result, nil
	}

	if !api.canWrite(arg.User) {
		return params.ErrorResults{}, common.ServerError(common.ErrPerm)
	}

	// For now, authorised keys are global, common to all users.
	sshKeys, currentFingerprints, err := api.currentKeyDataForAdd()
	if err != nil {
		return params.ErrorResults{}, common.ServerError(fmt.Errorf("reading current key data: %v", err))
	}

	// Ensure we are not going to add invalid or duplicate keys.
	result.Results = make([]params.ErrorResult, len(arg.Keys))
	for i, key := range arg.Keys {
		fingerprint, _, err := ssh.KeyFingerprint(key)
		if err != nil {
			result.Results[i].Error = common.ServerError(fmt.Errorf("invalid ssh key: %s", key))
			continue
		}
		if currentFingerprints.Contains(fingerprint) {
			result.Results[i].Error = common.ServerError(fmt.Errorf("duplicate ssh key: %s", key))
			continue
		}
		sshKeys = append(sshKeys, key)
	}
	err = api.writeSSHKeys(sshKeys)
	if err != nil {
		return params.ErrorResults{}, common.ServerError(err)
	}
	return result, nil
}
Exemple #9
0
func parseKeys(keys []string, mode ssh.ListMode) (keyInfo []string) {
	for _, key := range keys {
		fingerprint, comment, err := ssh.KeyFingerprint(key)
		if err != nil {
			keyInfo = append(keyInfo, fmt.Sprintf("Invalid key: %v", key))
			continue
		}
		// Only including user added keys not internal ones.
		if internalComments.Contains(comment) {
			continue
		}
		if mode == ssh.FullKeys {
			keyInfo = append(keyInfo, key)
		} else {
			shortKey := fingerprint
			if comment != "" {
				shortKey += fmt.Sprintf(" (%s)", comment)
			}
			keyInfo = append(keyInfo, shortKey)
		}
	}
	return keyInfo
}
func (s *FingerprintSuite) TestKeyFingerprintError(c *gc.C) {
	_, _, err := ssh.KeyFingerprint("invalid key")
	c.Assert(err, gc.ErrorMatches, `generating key fingerprint: invalid authorized_key "invalid key"`)
}