mirror of
https://github.com/ceph/ceph-csi.git
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bd204d7d45
Every Ceph CLI that is invoked at present passes the key via the --key option, and hence is exposed to key being displayed on the host using a ps command or such means. This commit addresses this issue by stashing the key in a tmp file, which is again created on a tmpfs (or empty dir backed by memory). Further using such tmp files as arguments to the --keyfile option for every CLI that is invoked. This prevents the key from being visible as part of the argument list of the invoked program on the system. Fixes: #318 Signed-off-by: ShyamsundarR <srangana@redhat.com>
121 lines
2.8 KiB
Go
121 lines
2.8 KiB
Go
/*
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Copyright 2018 The Ceph-CSI Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package util
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import (
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"fmt"
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"io/ioutil"
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"os"
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)
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const (
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credUserID = "userID"
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credUserKey = "userKey"
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credAdminID = "adminID"
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credAdminKey = "adminKey"
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credMonitors = "monitors"
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tmpKeyFileLocation = "/tmp/csi/keys"
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tmpKeyFileNamePrefix = "keyfile-"
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)
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type Credentials struct {
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ID string
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KeyFile string
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}
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func storeKey(key string) (string, error) {
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tmpfile, err := ioutil.TempFile(tmpKeyFileLocation, tmpKeyFileNamePrefix)
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if err != nil {
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return "", fmt.Errorf("error creating a temporary keyfile (%s)", err)
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}
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defer func() {
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if err != nil {
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os.Remove(tmpfile.Name())
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}
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}()
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if _, err = tmpfile.Write([]byte(key)); err != nil {
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return "", fmt.Errorf("error writing key to temporary keyfile (%s)", err)
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}
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keyFile := tmpfile.Name()
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if keyFile == "" {
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err = fmt.Errorf("error reading temporary filename for key (%s)", err)
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return "", err
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}
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if err = tmpfile.Close(); err != nil {
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return "", fmt.Errorf("error closing temporary filename (%s)", err)
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}
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return keyFile, nil
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}
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func newCredentialsFromSecret(idField, keyField string, secrets map[string]string) (*Credentials, error) {
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var (
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c = &Credentials{}
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ok bool
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)
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if c.ID, ok = secrets[idField]; !ok {
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return nil, fmt.Errorf("missing ID field '%s' in secrets", idField)
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}
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key := secrets[keyField]
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if key == "" {
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return nil, fmt.Errorf("missing key field '%s' in secrets", keyField)
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}
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keyFile, err := storeKey(key)
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if err == nil {
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c.KeyFile = keyFile
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}
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return c, err
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}
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func (cr *Credentials) DeleteCredentials() {
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os.Remove(cr.KeyFile)
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}
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func NewUserCredentials(secrets map[string]string) (*Credentials, error) {
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return newCredentialsFromSecret(credUserID, credUserKey, secrets)
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}
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func NewAdminCredentials(secrets map[string]string) (*Credentials, error) {
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return newCredentialsFromSecret(credAdminID, credAdminKey, secrets)
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}
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func NewCredentials(id, key string) (*Credentials, error) {
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var c = &Credentials{}
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c.ID = id
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keyFile, err := storeKey(key)
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if err == nil {
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c.KeyFile = keyFile
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}
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return c, err
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}
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func GetMonValFromSecret(secrets map[string]string) (string, error) {
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if mons, ok := secrets[credMonitors]; ok {
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return mons, nil
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}
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return "", fmt.Errorf("missing %q", credMonitors)
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}
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