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localtest.go
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localtest.go
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package node
import (
"crypto"
"crypto/ed25519"
"crypto/rand"
"crypto/x509"
"crypto/x509/pkix"
"encoding/pem"
"log"
"math/big"
"net"
"strconv"
"sync"
"time"
"github.com/ChristianMct/helium/objectstore"
cryptoUtil "github.com/ChristianMct/helium/utils/certs"
"github.com/ChristianMct/helium"
"github.com/ChristianMct/helium/session"
"github.com/ChristianMct/helium/transport/centralized"
"github.com/tuneinsight/lattigo/v4/bgv"
"github.com/tuneinsight/lattigo/v4/drlwe"
"golang.org/x/net/context"
"google.golang.org/grpc/test/bufconn"
)
// LocalTestConfig is a configuration structure for LocalTest types.
type LocalTestConfig struct {
PeerNodes int // Number of peer nodes in the session
SessionParams *session.Parameters
InsecureChannels bool // use TLS for this test. TODO: fix TLS
ObjectStoreConfig *objectstore.Config // nodes's object store configuration for this test
}
// LocalTest represent a local test setting with several nodes and a single
// session with group secret key.
type LocalTest struct {
Nodes []*Node
PeerNodes []*Node
HelperNode *Node
Params bgv.Parameters
*session.TestSession
HelperConfig Config
SessNodeConfigs []Config
helium.NodesList
}
// NewLocalTest creates a new LocalTest from the configuration and returns it.
func NewLocalTest(config LocalTestConfig) (test *LocalTest, err error) {
test = new(LocalTest)
helperID := helium.NodeID("helper")
sessNodesID := make([]helium.NodeID, config.PeerNodes)
shamirPks := make(map[helium.NodeID]drlwe.ShamirPublicPoint, config.PeerNodes)
test.NodesList = make(helium.NodesList, 1+config.PeerNodes)
for i := range sessNodesID {
nid := helium.NodeID("peer-" + strconv.Itoa(i))
sessNodesID[i] = nid
shamirPks[nid] = drlwe.ShamirPublicPoint(i + 1)
test.NodesList[i] = helium.NodeInfo{NodeID: nid}
}
test.NodesList[len(sessNodesID)] = helium.NodeInfo{NodeID: helperID, NodeAddress: "local"}
config.SessionParams.Nodes = sessNodesID
config.SessionParams.ShamirPks = shamirPks
config.SessionParams.ID = "test-session"
config.SessionParams.PublicSeed = []byte{'l', 'a', 't', 't', 'i', 'g', '0'}
nodeSecrets, err := session.GenTestSecretKeys(*config.SessionParams)
if err != nil {
return nil, err
}
test.SessNodeConfigs, test.HelperConfig = genNodeConfigs(config, test.NodesList, nodeSecrets)
if config.SessionParams != nil {
test.TestSession, err = session.NewTestSessionFromParams(*config.SessionParams, test.HelperConfig.ID)
if err != nil {
return nil, err
}
}
test.Nodes = make([]*Node, 1+config.PeerNodes)
test.HelperNode, err = New(test.HelperConfig, test.NodesList)
if err != nil {
return nil, err
}
test.Nodes[0] = test.HelperNode
for i, nc := range test.SessNodeConfigs {
var err error
test.Nodes[i+1], err = New(nc, test.NodesList)
if err != nil {
return nil, err
}
}
test.PeerNodes = test.Nodes[1:]
return test, nil
}
// genNodeConfigs generates the necessary NodeConfig for each party specified in the LocalTestConfig.
func genNodeConfigs(config LocalTestConfig, nl helium.NodesList, secrets map[helium.NodeID]*session.Secrets) (sessNodesConfig []Config, helperNodeConfig Config) {
tlsConfigs, err := createTLSConfigs(config, nl)
if err != nil {
log.Println(err)
panic("failed to generate tls configs - got err")
}
objstoreconf := objectstore.Config{
BackendName: "mem",
}
if config.ObjectStoreConfig != nil {
objstoreconf = *config.ObjectStoreConfig
}
sp := config.SessionParams
hid := nl[len(nl)-1].NodeID
sessNodesConfig = make([]Config, config.PeerNodes)
for i := range sessNodesConfig {
nid := nl[i].NodeID
sessNodesConfig[i] = Config{
ID: nid,
HelperID: hid,
SessionParameters: []session.Parameters{*sp},
TLSConfig: tlsConfigs[nid],
ObjectStoreConfig: objstoreconf,
}
sessNodesConfig[i].SessionParameters[0].Secrets = secrets[nid]
}
helperNodeConfig = Config{
ID: hid,
Address: "local",
HelperID: hid,
SessionParameters: []session.Parameters{*sp},
TLSConfig: tlsConfigs[hid],
ObjectStoreConfig: objstoreconf,
}
return sessNodesConfig, helperNodeConfig
}
type nodeCrypto struct {
pubkey crypto.PublicKey
skey crypto.PrivateKey
cert x509.Certificate
}
func createTLSConfigs(testConfig LocalTestConfig, nodeList helium.NodesList) (map[helium.NodeID]centralized.TLSConfig, error) {
tlsConfigs := make(map[helium.NodeID]centralized.TLSConfig, len(nodeList))
if testConfig.InsecureChannels {
for _, n := range nodeList {
tlsConfigs[n.NodeID] = centralized.TLSConfig{InsecureChannels: true}
}
return tlsConfigs, nil
}
caPubKey, caPrivKey, err := ed25519.GenerateKey(nil)
if err != nil {
return nil, err
}
caCertTemp := &x509.Certificate{
SerialNumber: big.NewInt(1337),
Subject: pkix.Name{
Organization: []string{"Helium Cert, SA"},
Country: []string{"CH"},
Locality: []string{"Lausanne"},
CommonName: "Helium Cert",
},
NotBefore: time.Now(),
NotAfter: time.Now().AddDate(10, 0, 0),
IsCA: true,
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth},
KeyUsage: x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
BasicConstraintsValid: true,
}
// create the CA
caBytes, err := x509.CreateCertificate(rand.Reader, caCertTemp, caCertTemp, caPubKey, caPrivKey)
if err != nil {
return nil, err
}
dummy, _ := x509.ParseCertificate(caBytes)
caCert := *dummy
caCertPem, err := cryptoUtil.ToPEM(caCert)
if err != nil {
return nil, err
}
peerCrypto := make(map[helium.NodeID]nodeCrypto, len(nodeList))
// sign certs for everyone
for _, peer := range nodeList {
pubkey, skey, errGenKey := ed25519.GenerateKey(nil)
if errGenKey != nil {
return nil, errGenKey
}
csrbytes, errGenCSR := cryptoUtil.GenCSR(string(peer.NodeID), pubkey, skey)
if errGenCSR != nil {
return nil, errGenCSR
}
csrPEM, _ := pem.Decode(csrbytes)
csr, errParseCertReq := x509.ParseCertificateRequest(csrPEM.Bytes)
if errParseCertReq != nil {
return nil, errParseCertReq
}
certTemp := x509.Certificate{
SerialNumber: big.NewInt(1337),
Subject: csr.Subject,
NotBefore: time.Now(),
NotAfter: time.Now().AddDate(10, 0, 0),
ExtraExtensions: csr.Extensions,
DNSNames: csr.DNSNames,
EmailAddresses: csr.EmailAddresses,
IPAddresses: csr.IPAddresses,
URIs: csr.URIs,
Signature: csr.Signature,
SignatureAlgorithm: csr.SignatureAlgorithm,
PublicKeyAlgorithm: csr.PublicKeyAlgorithm,
PublicKey: csr.PublicKey,
}
cert, errCreateCert := x509.CreateCertificate(rand.Reader, &certTemp, &caCert, pubkey, caPrivKey)
if errCreateCert != nil {
return nil, errCreateCert
}
certObj, errParseCert := x509.ParseCertificate(cert)
if errParseCert != nil {
return nil, errParseCert
}
peerCrypto[peer.NodeID] = nodeCrypto{
pubkey: pubkey,
skey: skey,
cert: *certObj,
}
}
// create the tls configs
for nodeID, nodeCrypo := range peerCrypto {
peerPKs := make(map[helium.NodeID]string, len(nodeList)-1) // fully connected nodes
peerCerts := make(map[helium.NodeID]string, len(nodeList)-1)
var skPem, pkPem, certPem []byte
skPem, err = cryptoUtil.ToPEM(nodeCrypo.skey)
if err != nil {
return nil, err
}
pkPem, err = cryptoUtil.ToPEM(nodeCrypo.pubkey)
if err != nil {
return nil, err
}
certPem, err = cryptoUtil.ToPEM(nodeCrypo.cert)
if err != nil {
return nil, err
}
for otherNodeID, otherNodeCrypto := range peerCrypto {
if nodeID == otherNodeID {
continue
}
peerPkPem, errPk := cryptoUtil.ToPEM(otherNodeCrypto.pubkey)
if errPk != nil {
return nil, errPk
}
peerCertPem, errCrt := cryptoUtil.ToPEM(otherNodeCrypto.cert)
if errCrt != nil {
return nil, errCrt
}
peerPKs[otherNodeID] = string(peerPkPem)
peerCerts[otherNodeID] = string(peerCertPem)
}
tlsConfigs[nodeID] = centralized.TLSConfig{
OwnSk: string(skPem),
OwnPk: string(pkPem),
OwnCert: string(certPem),
PeerPKs: peerPKs,
PeerCerts: peerCerts,
CACert: string(caCertPem),
}
}
return tlsConfigs, nil
}
const buffConBufferSize = 65 * 1024 * 1024
// Start creates some in-memory connections between the nodes and returns
// when all nodes are connected.
func (lc LocalTest) Start() {
lis := bufconn.Listen(buffConBufferSize)
go lc.HelperNode.srv.Server.Serve(lis)
var wg sync.WaitGroup
for _, node := range lc.SessionNodes() {
node := node
wg.Add(1)
go func() {
err := node.cli.ConnectWithDialer(func(context.Context, string) (net.Conn, error) { return lis.Dial() })
if err != nil {
log.Printf("node %s failed to connect: %v", node.ID(), err)
return
}
wg.Done()
}()
}
wg.Wait()
}
// SessionNodes returns the set of nodes in the local test that are part of the
// session.
func (lc LocalTest) SessionNodes() []*Node {
return lc.Nodes[1:]
}
func (lc LocalTest) SessionNodesIds() []helium.NodeID {
sessionNodes := lc.SessionNodes()
ids := make([]helium.NodeID, len(sessionNodes))
for i, node := range sessionNodes {
ids[i] = node.id
}
return ids
}
// NodeIds returns the node ideas of all nodes in the local test.
func (lc LocalTest) NodeIds() []helium.NodeID {
ids := make([]helium.NodeID, len(lc.Nodes))
for i, node := range lc.Nodes {
ids[i] = node.id
}
return ids
}
// Close releases all the resources allocated by a localtest.
func (lc LocalTest) Close() error {
for _, node := range lc.Nodes {
err := node.Close()
if err != nil {
return err
}
}
return nil
}