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Update key handling logic to process keyring with 3 keys 

Signed-off-by: Santhosh Manohar <santhosh@docker.com>
This commit is contained in:
Santhosh Manohar 2016-06-11 04:50:25 -07:00
parent 21c6bab508
commit 8ded762a0b
5 changed files with 170 additions and 75 deletions
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171
libnetwork/agent.go
View File

@ -3,12 +3,10 @@ package libnetwork
//go:generate protoc -I.:Godeps/_workspace/src/github.com/gogo/protobuf --gogo_out=import_path=github.com/docker/libnetwork,Mgogoproto/gogo.proto=github.com/gogo/protobuf/gogoproto:. agent.proto
import (
"encoding/hex"
"fmt"
"net"
"os"
"sort"
"strconv"
"github.com/Sirupsen/logrus"
"github.com/docker/go-events"
@ -20,6 +18,12 @@ import (
"github.com/gogo/protobuf/proto"
)
const (
subsysGossip = "networking:gossip"
subsysIPSec = "networking:ipsec"
keyringSize = 3
)
// ByTime implements sort.Interface for []*types.EncryptionKey based on
// the LamportTime field.
type ByTime []*types.EncryptionKey
@ -80,6 +84,82 @@ func resolveAddr(addrOrInterface string) (string, error) {
func (c *controller) handleKeyChange(keys []*types.EncryptionKey) error {
drvEnc := discoverapi.DriverEncryptionUpdate{}
a := c.agent
// Find the deleted key. If the deleted key was the primary key,
// a new primary key should be set before removing if from keyring.
deleted := []byte{}
j := len(c.keys)
for i := 0; i < j; {
same := false
for _, key := range keys {
if same = key.LamportTime == c.keys[i].LamportTime; same {
break
}
}
if !same {
cKey := c.keys[i]
if cKey.Subsystem == subsysGossip {
deleted = cKey.Key
}
if cKey.Subsystem == subsysGossip /* subsysIPSec */ {
drvEnc.Prune = cKey.Key
drvEnc.PruneTag = cKey.LamportTime
}
c.keys[i], c.keys[j-1] = c.keys[j-1], c.keys[i]
c.keys[j-1] = nil
j--
}
i++
}
c.keys = c.keys[:j]
// Find the new key and add it to the key ring
for _, key := range keys {
same := false
for _, cKey := range c.keys {
if same = cKey.LamportTime == key.LamportTime; same {
break
}
}
if !same {
c.keys = append(c.keys, key)
if key.Subsystem == subsysGossip {
a.networkDB.SetKey(key.Key)
}
if key.Subsystem == subsysGossip /*subsysIPSec*/ {
drvEnc.Key = key.Key
drvEnc.Tag = key.LamportTime
}
}
}
key, tag := c.getPrimaryKeyTag(subsysGossip)
a.networkDB.SetPrimaryKey(key)
//key, tag = c.getPrimaryKeyTag(subsysIPSec)
drvEnc.Primary = key
drvEnc.PrimaryTag = tag
if len(deleted) > 0 {
a.networkDB.RemoveKey(deleted)
}
c.drvRegistry.WalkDrivers(func(name string, driver driverapi.Driver, capability driverapi.Capability) bool {
err := driver.DiscoverNew(discoverapi.EncryptionKeysUpdate, drvEnc)
if err != nil {
logrus.Warnf("Failed to update datapath keys in driver %s: %v", name, err)
}
return false
})
return nil
}
func (c *controller) handleKeyChangeV1(keys []*types.EncryptionKey) error {
drvEnc := discoverapi.DriverEncryptionUpdate{}
// Find the new key and add it to the key ring
a := c.agent
for _, key := range keys {
@ -91,12 +171,12 @@ func (c *controller) handleKeyChange(keys []*types.EncryptionKey) error {
}
if !same {
c.keys = append(c.keys, key)
if key.Subsystem == "networking:gossip" {
if key.Subsystem == subsysGossip {
a.networkDB.SetKey(key.Key)
}
if key.Subsystem == "networking:gossip" /*"networking:ipsec"*/ {
drvEnc.Key = hex.EncodeToString(key.Key)
drvEnc.Tag = strconv.FormatUint(key.LamportTime, 10)
if key.Subsystem == subsysGossip /*subsysIPSec*/ {
drvEnc.Key = key.Key
drvEnc.Tag = key.LamportTime
}
break
}
@ -112,12 +192,12 @@ func (c *controller) handleKeyChange(keys []*types.EncryptionKey) error {
}
}
if !same {
if cKey.Subsystem == "networking:gossip" {
if cKey.Subsystem == subsysGossip {
deleted = cKey.Key
}
if cKey.Subsystem == "networking:gossip" /*"networking:ipsec"*/ {
drvEnc.Prune = hex.EncodeToString(cKey.Key)
drvEnc.PruneTag = strconv.FormatUint(cKey.LamportTime, 10)
if cKey.Subsystem == subsysGossip /*subsysIPSec*/ {
drvEnc.Prune = cKey.Key
drvEnc.PruneTag = cKey.LamportTime
}
c.keys = append(c.keys[:i], c.keys[i+1:]...)
break
@ -126,15 +206,15 @@ func (c *controller) handleKeyChange(keys []*types.EncryptionKey) error {
sort.Sort(ByTime(c.keys))
for _, key := range c.keys {
if key.Subsystem == "networking:gossip" {
if key.Subsystem == subsysGossip {
a.networkDB.SetPrimaryKey(key.Key)
break
}
}
for _, key := range c.keys {
if key.Subsystem == "networking:gossip" /*"networking:ipsec"*/ {
drvEnc.Primary = hex.EncodeToString(key.Key)
drvEnc.PrimaryTag = strconv.FormatUint(key.LamportTime, 10)
if key.Subsystem == subsysGossip /*subsysIPSec*/ {
drvEnc.Primary = key.Key
drvEnc.PrimaryTag = key.LamportTime
break
}
}
@ -197,6 +277,41 @@ func (c *controller) agentSetup() error {
return nil
}
// For a given subsystem getKeys sorts the keys by lamport time and returns
// slice of keys and lamport time which can used as a unique tag for the keys
func (c *controller) getKeys(subsys string) ([][]byte, []uint64) {
sort.Sort(ByTime(c.keys))
keys := [][]byte{}
tags := []uint64{}
for _, key := range c.keys {
if key.Subsystem == subsys {
keys = append(keys, key.Key)
tags = append(tags, key.LamportTime)
}
}
if len(keys) < keyringSize {
return keys, tags
}
keys[0], keys[1] = keys[1], keys[0]
tags[0], tags[1] = tags[1], tags[0]
return keys, tags
}
// getPrimaryKeyTag returns the primary key for a given subsytem from the
// list of sorted key and the associated tag
func (c *controller) getPrimaryKeyTag(subsys string) ([]byte, uint64) {
sort.Sort(ByTime(c.keys))
keys := []*types.EncryptionKey{}
for _, key := range c.keys {
if key.Subsystem == subsys {
keys = append(keys, key)
}
}
return keys[1].Key, keys[1].LamportTime
}
func (c *controller) agentInit(bindAddrOrInterface string) error {
if !c.isAgent() {
return nil
@ -204,19 +319,9 @@ func (c *controller) agentInit(bindAddrOrInterface string) error {
drvEnc := discoverapi.DriverEncryptionConfig{}
// sort the keys by lamport time
sort.Sort(ByTime(c.keys))
gossipkey := [][]byte{}
for _, key := range c.keys {
if key.Subsystem == "networking:gossip" {
gossipkey = append(gossipkey, key.Key)
}
if key.Subsystem == "networking:gossip" /*"networking:ipsec"*/ {
drvEnc.Keys = append(drvEnc.Keys, hex.EncodeToString(key.Key))
drvEnc.Tags = append(drvEnc.Tags, strconv.FormatUint(key.LamportTime, 10))
}
}
keys, tags := c.getKeys(subsysGossip) // getKeys(subsysIPSec)
drvEnc.Keys = keys
drvEnc.Tags = tags
bindAddr, err := resolveAddr(bindAddrOrInterface)
if err != nil {
@ -227,7 +332,7 @@ func (c *controller) agentInit(bindAddrOrInterface string) error {
nDB, err := networkdb.New(&networkdb.Config{
BindAddr: bindAddr,
NodeName: hostname,
Keys: gossipkey,
Keys: keys,
})
if err != nil {
@ -275,12 +380,10 @@ func (c *controller) agentDriverNotify(d driverapi.Driver) {
})
drvEnc := discoverapi.DriverEncryptionConfig{}
for _, key := range c.keys {
if key.Subsystem == "networking:gossip" /*"networking:ipsec"*/ {
drvEnc.Keys = append(drvEnc.Keys, hex.EncodeToString(key.Key))
drvEnc.Tags = append(drvEnc.Tags, strconv.FormatUint(key.LamportTime, 10))
}
}
keys, tags := c.getKeys(subsysGossip) // getKeys(subsysIPSec)
drvEnc.Keys = keys
drvEnc.Tags = tags
c.drvRegistry.WalkDrivers(func(name string, driver driverapi.Driver, capability driverapi.Capability) bool {
err := driver.DiscoverNew(discoverapi.EncryptionKeysConfig, drvEnc)
if err != nil {

3
libnetwork/controller.go
View File

@ -264,6 +264,9 @@ func (c *controller) SetKeys(keys []*types.EncryptionKey) error {
c.Unlock()
return nil
}
if len(keys) < keyringSize {
return c.handleKeyChangeV1(keys)
}
return c.handleKeyChange(keys)
}

16
libnetwork/discoverapi/discoverapi.go
View File

@ -42,18 +42,18 @@ type DatastoreConfigData struct {
// Key in first position is the primary key, the one to be used in tx.
// Original key and tag types are []byte and uint64
type DriverEncryptionConfig struct {
Keys []string
Tags []string
Keys [][]byte
Tags []uint64
}
// DriverEncryptionUpdate carries an update to the encryption key(s) as:
// a new key and/or set a primary key and/or a removal of an existing key.
// Original key and tag types are []byte and uint64
type DriverEncryptionUpdate struct {
Key string
Tag string
Primary string
PrimaryTag string
Prune string
PruneTag string
Key []byte
Tag uint64
Primary []byte
PrimaryTag uint64
Prune []byte
PruneTag uint64
}

25
libnetwork/drivers/overlay/encryption.go
View File

@ -33,7 +33,10 @@ type key struct {
}
func (k *key) String() string {
return fmt.Sprintf("(key: %s, tag: 0x%x)", hex.EncodeToString(k.value)[0:5], k.tag)
if k != nil {
return fmt.Sprintf("(key: %s, tag: 0x%x)", hex.EncodeToString(k.value)[0:5], k.tag)
}
return ""
}
type spi struct {
@ -557,23 +560,3 @@ func updateNodeKey(lIP, rIP net.IP, idxs []*spi, curKeys []*key, newIdx, priIdx,
return spis
}
func parseEncryptionKey(value, tag string) (*key, error) {
var (
k *key
err error
)
if value == "" {
return nil, nil
}
k = &key{}
if k.value, err = hex.DecodeString(value); err != nil {
return nil, types.BadRequestErrorf("failed to decode key (%s): %v", value, err)
}
t, err := strconv.ParseUint(tag, 10, 64)
if err != nil {
return nil, types.BadRequestErrorf("failed to decode tag (%s): %v", tag, err)
}
k.tag = uint32(t)
return k, nil
}

30
libnetwork/drivers/overlay/overlay.go
View File

@ -306,9 +306,9 @@ func (d *driver) DiscoverNew(dType discoverapi.DiscoveryType, data interface{})
}
keys := make([]*key, 0, len(encrData.Keys))
for i := 0; i < len(encrData.Keys); i++ {
k, err := parseEncryptionKey(encrData.Keys[i], encrData.Tags[i])
if err != nil {
return err
k := &key{
value: encrData.Keys[i],
tag: uint32(encrData.Tags[i]),
}
keys = append(keys, k)
}
@ -319,17 +319,23 @@ func (d *driver) DiscoverNew(dType discoverapi.DiscoveryType, data interface{})
if !ok {
return fmt.Errorf("invalid encryption key notification data")
}
newKey, err = parseEncryptionKey(encrData.Key, encrData.Tag)
if err != nil {
return err
if encrData.Key != nil {
newKey = &key{
value: encrData.Key,
tag: uint32(encrData.Tag),
}
}
priKey, err = parseEncryptionKey(encrData.Primary, encrData.PrimaryTag)
if err != nil {
return err
if encrData.Primary != nil {
priKey = &key{
value: encrData.Primary,
tag: uint32(encrData.PrimaryTag),
}
}
delKey, err = parseEncryptionKey(encrData.Prune, encrData.PruneTag)
if err != nil {
return err
if encrData.Prune != nil {
delKey = &key{
value: encrData.Prune,
tag: uint32(encrData.PruneTag),
}
}
d.updateKeys(newKey, priKey, delKey)
default: