/usr/share/gocode/src/github.com/ctdk/goiardi/secret/vault.go is in golang-github-ctdk-goiardi-dev 0.11.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
* Copyright (c) 2013-2016, Jeremy Bingham (<jeremy@goiardi.gl>)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package secret
// Functions for using hashicorp vault (https://www.vaultproject.io/) to store
// secrets in goiardi.
import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"fmt"
"github.com/ctdk/goiardi/config"
"github.com/tideland/golib/logger"
"sync"
"time"
)
// make this a pool later?
type vaultSecretStore struct {
m sync.RWMutex
secrets map[string]*secretVal
*vault.Client
}
const MaxStaleAgeSeconds = 3600 // configurable later, but make it an hour for
// now
const StaleTryAgainSeconds = 60 // try stale values again in a minute
type secretVal struct {
path string
secretType string
created time.Time
renewable bool
ttl time.Duration
expires time.Time
stale bool
staleTryAgain time.Time
staleTime time.Time
value interface{}
}
type secretConvert func(interface{}) (interface{}, error)
func configureVault() (*vaultSecretStore, error) {
conf := vault.DefaultConfig()
if err := conf.ReadEnvironment(); err != nil {
return nil, err
}
if config.Config.VaultAddr != "" {
conf.Address = config.Config.VaultAddr
}
c, err := vault.NewClient(conf)
if err != nil {
return nil, err
}
var m sync.RWMutex
secrets := make(map[string]*secretVal)
v := &vaultSecretStore{m, secrets, c}
return v, nil
}
func (v *vaultSecretStore) getSecret(path string, secretType string) (interface{}, error) {
if v.secrets[path] == nil {
logger.Debugf("secret (%s) for %s is nil, fetching from vault", secretType, path)
s, err := v.getSecretPath(path, secretType)
if err != nil {
return "", err
}
v.secrets[path] = s
} else {
logger.Debugf("using cached secret for %s", path)
}
return v.secretValue(v.secrets[path])
}
func (v *vaultSecretStore) getSecretPath(path string, secretType string) (*secretVal, error) {
t := time.Now()
s, err := v.Logical().Read(path)
if err != nil {
err := fmt.Errorf("Failed to read %s (%s) from vault: %s", path, secretType, err.Error())
return nil, err
}
if s == nil {
err := fmt.Errorf("No secret returned from vault for %s (%s)", path, secretType)
return nil, err
}
p := s.Data[secretType]
if p == nil {
err := fmt.Errorf("no data for %s (%s) from vault", path, secretType)
return nil, err
}
p, err = convertors(secretType)(p)
if err != nil {
return nil, err
}
sVal := newSecretVal(path, secretType, p, t, s)
return sVal, nil
}
func (v *vaultSecretStore) setSecret(path string, secretType string, value interface{}) error {
logger.Debugf("setting public key for %s (%s)", path, secretType)
t := time.Now()
_, err := v.Logical().Write(path, map[string]interface{}{
secretType: value,
})
if err != nil {
return err
}
s, err := v.Logical().Read(path)
if err != nil {
return fmt.Errorf("Error re-reading secret from vault after setting: %s", err.Error())
}
sVal := newSecretVal(path, secretType, value, t, s)
v.secrets[path] = sVal
return nil
}
func (v *vaultSecretStore) deleteSecret(path string) error {
delete(v.secrets, path)
_, err := v.Logical().Delete(path)
if err != nil {
return err
}
return nil
}
func (v *vaultSecretStore) getPublicKey(c ActorKeyer) (string, error) {
v.m.RLock()
defer v.m.RUnlock()
path := makePubKeyPath(c)
s, err := v.getSecret(path, "pubKey")
switch s := s.(type) {
case string:
return s, err
case []byte:
return string(s), err
case nil:
return "", err
default:
var errStr string
if err != nil {
errStr = err.Error()
}
err := fmt.Errorf("The type was wrong fetching the public key from vault: %T -- error, if any: %s", s, errStr)
return "", err
}
}
func (v *vaultSecretStore) setPublicKey(c ActorKeyer, pubKey string) error {
v.m.Lock()
defer v.m.Unlock()
path := makePubKeyPath(c)
return v.setSecret(path, "pubKey", pubKey)
}
func (v *vaultSecretStore) deletePublicKey(c ActorKeyer) error {
v.m.Lock()
defer v.m.Unlock()
path := makePubKeyPath(c)
return v.deleteSecret(path)
}
func makePubKeyPath(c ActorKeyer) string {
return fmt.Sprintf("keys/%s/%s", c.URLType(), c.GetName())
}
func makeHashPath(c ActorKeyer) string {
// strictly speaking only users actually have passwords, but in case
// something else ever comes up, make the path a little longer.
return fmt.Sprintf("keys/passwd/%s/%s", c.URLType(), c.GetName())
}
func newSecretVal(path string, secretType string, value interface{}, t time.Time, s *vault.Secret) *secretVal {
sVal := new(secretVal)
sVal.path = path
sVal.secretType = secretType
sVal.created = t
sVal.renewable = s.Renewable
sVal.ttl = time.Duration(s.LeaseDuration) * time.Second
sVal.expires = t.Add(sVal.ttl)
sVal.value = value
return sVal
}
func (s *secretVal) isExpired() bool {
if s.ttl == 0 {
return false
}
return time.Now().After(s.expires)
}
func (v *vaultSecretStore) secretValue(s *secretVal) (interface{}, error) {
if s.isExpired() {
logger.Debugf("trying to renew secret for %s", s.path)
s2, err := v.getSecretPath(s.path, s.secretType)
if !s.stale {
if err != nil {
logger.Debugf("error trying to renew the secret for %s: %s -- marking as stale", s.path, err.Error())
s.stale = true
s.staleTime = time.Now().Add(MaxStaleAgeSeconds * time.Second)
s.staleTryAgain = time.Now().Add(StaleTryAgainSeconds * time.Second)
} else {
logger.Debugf("successfully renewed secret for %s", s.path)
s = s2
}
} else if time.Now().After(s.staleTime) {
if err != nil {
err := fmt.Errorf("Couldn't renew the secret for %s before %d seconds ran out, giving up", s.path, MaxStaleAgeSeconds)
return nil, err
}
logger.Debugf("successfully renewed secret for %s beforegiving up due to staleness", s.path)
s = s2
} else if time.Now().After(s.staleTryAgain) {
if err != nil {
logger.Debugf("error trying to renew the secret for %s: %s -- will renew again in %d seconds", s.path, err.Error(), StaleTryAgainSeconds)
s.staleTryAgain = time.Now().Add(StaleTryAgainSeconds)
} else {
logger.Debugf("successfully renewed secret after being stale")
s = s2
}
}
}
return s.value, nil
}
func (v *vaultSecretStore) valueStr(s *secretVal) (string, error) {
val, err := v.secretValue(s)
if err != nil {
return "", err
}
valStr, ok := val.(string)
if !ok {
err := fmt.Errorf("value for %s was not a string, but a %T!", s.path, val)
return "", err
}
return valStr, nil
}
// shovey signing key
func (v *vaultSecretStore) getSigningKey(path string) (*rsa.PrivateKey, error) {
v.m.RLock()
defer v.m.RUnlock()
s, err := v.getSecret(path, "RSAKey")
switch s := s.(type) {
case *rsa.PrivateKey:
return s, err
default:
var errStr string
if err != nil {
errStr = err.Error()
}
kerr := fmt.Errorf("RSA private key for shovey was not returned. An object of type %T was. Error, if any: %s", s, errStr)
return nil, kerr
}
}
// user passwd hash methods
func (v *vaultSecretStore) setPasswdHash(c ActorKeyer, pwhash string) error {
v.m.Lock()
defer v.m.Unlock()
path := makeHashPath(c)
return v.setSecret(path, "passwd", pwhash)
}
func (v *vaultSecretStore) getPasswdHash(c ActorKeyer) (string, error) {
v.m.RLock()
defer v.m.RUnlock()
path := makeHashPath(c)
s, err := v.getSecret(path, "passwd")
switch s := s.(type) {
case string:
return s, err
case []byte:
return string(s), err
case nil:
return "", err
default:
var errStr string
if err != nil {
errStr = err.Error()
}
err := fmt.Errorf("The type was wrong fetching the passwd hash from vault: %T -- error, if any: %s", s, errStr)
return "", err
}
}
func (v *vaultSecretStore) deletePasswdHash(c ActorKeyer) error {
v.m.Lock()
defer v.m.Unlock()
path := makeHashPath(c)
return v.deleteSecret(path)
}
// funcs to process secrets after fetching them from vault
func secretPassThrough(i interface{}) (interface{}, error) {
return i, nil
}
func secretRSAKey(i interface{}) (interface{}, error) {
p, ok := i.(string)
if !ok {
return nil, fmt.Errorf("not an RSA private key in string form")
}
pBlock, _ := pem.Decode([]byte(p))
if pBlock == nil {
return nil, fmt.Errorf("invalid block size for private key for shovey from vault")
}
pk, err := x509.ParsePKCS1PrivateKey(pBlock.Bytes)
if err != nil {
return nil, err
}
return pk, nil
}
func convertors(secretType string) secretConvert {
switch secretType {
case "RSAKey":
return secretRSAKey
default:
return secretPassThrough
}
}
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