332 lines
9.5 KiB
Go
332 lines
9.5 KiB
Go
// Copyright (C) 2018 Storj Labs, Inc.
|
|
// See LICENSE for copying information.
|
|
|
|
package identity
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"crypto"
|
|
"crypto/tls"
|
|
"crypto/x509"
|
|
"io/ioutil"
|
|
|
|
"github.com/zeebo/errs"
|
|
"golang.org/x/crypto/sha3"
|
|
"google.golang.org/grpc"
|
|
"google.golang.org/grpc/credentials"
|
|
"google.golang.org/grpc/peer"
|
|
|
|
"storj.io/storj/pkg/peertls"
|
|
"storj.io/storj/pkg/storj"
|
|
"storj.io/storj/pkg/utils"
|
|
)
|
|
|
|
// PeerIdentity represents another peer on the network.
|
|
type PeerIdentity struct {
|
|
RestChain []*x509.Certificate
|
|
// CA represents the peer's self-signed CA
|
|
CA *x509.Certificate
|
|
// Leaf represents the leaf they're currently using. The leaf should be
|
|
// signed by the CA. The leaf is what is used for communication.
|
|
Leaf *x509.Certificate
|
|
// The ID taken from the CA public key
|
|
ID storj.NodeID
|
|
}
|
|
|
|
// FullIdentity represents you on the network. In addition to a PeerIdentity,
|
|
// a FullIdentity also has a Key, which a PeerIdentity doesn't have.
|
|
type FullIdentity struct {
|
|
RestChain []*x509.Certificate
|
|
// CA represents the peer's self-signed CA. The ID is taken from this cert.
|
|
CA *x509.Certificate
|
|
// Leaf represents the leaf they're currently using. The leaf should be
|
|
// signed by the CA. The leaf is what is used for communication.
|
|
Leaf *x509.Certificate
|
|
// The ID taken from the CA public key
|
|
ID storj.NodeID
|
|
// Key is the key this identity uses with the leaf for communication.
|
|
Key crypto.PrivateKey
|
|
}
|
|
|
|
// SetupConfig allows you to run a set of Responsibilities with the given
|
|
// identity. You can also just load an Identity from disk.
|
|
type SetupConfig struct {
|
|
CertPath string `help:"path to the certificate chain for this identity" default:"$CONFDIR/identity.cert"`
|
|
KeyPath string `help:"path to the private key for this identity" default:"$CONFDIR/identity.key"`
|
|
Overwrite bool `help:"if true, existing identity certs AND keys will overwritten for" default:"false"`
|
|
Version string `help:"semantic version of identity storage format" default:"0"`
|
|
}
|
|
|
|
// Config allows you to run a set of Responsibilities with the given
|
|
// identity. You can also just load an Identity from disk.
|
|
type Config struct {
|
|
CertPath string `help:"path to the certificate chain for this identity" default:"$CONFDIR/identity.cert"`
|
|
KeyPath string `help:"path to the private key for this identity" default:"$CONFDIR/identity.key"`
|
|
}
|
|
|
|
// FullIdentityFromPEM loads a FullIdentity from a certificate chain and
|
|
// private key PEM-encoded bytes
|
|
func FullIdentityFromPEM(chainPEM, keyPEM []byte) (*FullIdentity, error) {
|
|
chain, err := DecodeAndParseChainPEM(chainPEM)
|
|
if err != nil {
|
|
return nil, errs.Wrap(err)
|
|
}
|
|
keysBytes, err := decodePEM(keyPEM)
|
|
if err != nil {
|
|
return nil, errs.Wrap(err)
|
|
}
|
|
// NB: there shouldn't be multiple keys in the key file but if there
|
|
// are, this uses the first one
|
|
key, err := x509.ParseECPrivateKey(keysBytes[0])
|
|
if err != nil {
|
|
return nil, errs.New("unable to parse EC private key: %v", err)
|
|
}
|
|
nodeID, err := NodeIDFromKey(chain[peertls.CAIndex].PublicKey)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &FullIdentity{
|
|
RestChain: chain[peertls.CAIndex+1:],
|
|
CA: chain[peertls.CAIndex],
|
|
Leaf: chain[peertls.LeafIndex],
|
|
Key: key,
|
|
ID: nodeID,
|
|
}, nil
|
|
}
|
|
|
|
// ParseCertChain converts a chain of certificate bytes into x509 certs
|
|
func ParseCertChain(chain [][]byte) ([]*x509.Certificate, error) {
|
|
c := make([]*x509.Certificate, len(chain))
|
|
for i, ct := range chain {
|
|
cp, err := x509.ParseCertificate(ct)
|
|
if err != nil {
|
|
return nil, errs.Wrap(err)
|
|
}
|
|
c[i] = cp
|
|
}
|
|
return c, nil
|
|
}
|
|
|
|
// PeerIdentityFromCerts loads a PeerIdentity from a pair of leaf and ca x509 certificates
|
|
func PeerIdentityFromCerts(leaf, ca *x509.Certificate, rest []*x509.Certificate) (*PeerIdentity, error) {
|
|
i, err := NodeIDFromKey(ca.PublicKey.(crypto.PublicKey))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &PeerIdentity{
|
|
RestChain: rest,
|
|
CA: ca,
|
|
ID: i,
|
|
Leaf: leaf,
|
|
}, nil
|
|
}
|
|
|
|
// PeerIdentityFromPeer loads a PeerIdentity from a peer connection
|
|
func PeerIdentityFromPeer(peer *peer.Peer) (*PeerIdentity, error) {
|
|
tlsInfo := peer.AuthInfo.(credentials.TLSInfo)
|
|
c := tlsInfo.State.PeerCertificates
|
|
if len(c) < 2 {
|
|
return nil, Error.New("invalid certificate chain")
|
|
}
|
|
pi, err := PeerIdentityFromCerts(c[peertls.LeafIndex], c[peertls.CAIndex], c[2:])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return pi, nil
|
|
}
|
|
|
|
// PeerIdentityFromContext loads a PeerIdentity from a ctx TLS credentials
|
|
func PeerIdentityFromContext(ctx context.Context) (*PeerIdentity, error) {
|
|
p, ok := peer.FromContext(ctx)
|
|
if !ok {
|
|
return nil, Error.New("unable to get grpc peer from contex")
|
|
}
|
|
|
|
return PeerIdentityFromPeer(p)
|
|
}
|
|
|
|
// NodeIDFromKey hashes a publc key and creates a node ID from it
|
|
func NodeIDFromKey(k crypto.PublicKey) (storj.NodeID, error) {
|
|
kb, err := x509.MarshalPKIXPublicKey(k)
|
|
if err != nil {
|
|
return storj.NodeID{}, storj.ErrNodeID.Wrap(err)
|
|
}
|
|
hash := make([]byte, len(storj.NodeID{}))
|
|
sha3.ShakeSum256(hash, kb)
|
|
return storj.NodeIDFromBytes(hash)
|
|
}
|
|
|
|
// NewFullIdentity creates a new ID for nodes with difficulty and concurrency params
|
|
func NewFullIdentity(ctx context.Context, difficulty uint16, concurrency uint) (*FullIdentity, error) {
|
|
ca, err := NewCA(ctx, NewCAOptions{
|
|
Difficulty: difficulty,
|
|
Concurrency: concurrency,
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
identity, err := ca.NewIdentity()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return identity, err
|
|
}
|
|
|
|
// Status returns the status of the identity cert/key files for the config
|
|
func (is SetupConfig) Status() TLSFilesStatus {
|
|
return statTLSFiles(is.CertPath, is.KeyPath)
|
|
}
|
|
|
|
// Create generates and saves a CA using the config
|
|
func (is SetupConfig) Create(ca *FullCertificateAuthority) (*FullIdentity, error) {
|
|
fi, err := ca.NewIdentity()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
fi.CA = ca.Cert
|
|
ic := Config{
|
|
CertPath: is.CertPath,
|
|
KeyPath: is.KeyPath,
|
|
}
|
|
return fi, ic.Save(fi)
|
|
}
|
|
|
|
// FullConfig converts a `SetupConfig` to `Config`
|
|
func (is SetupConfig) FullConfig() Config {
|
|
return Config{
|
|
CertPath: is.CertPath,
|
|
KeyPath: is.KeyPath,
|
|
}
|
|
}
|
|
|
|
// Load loads a FullIdentity from the config
|
|
func (ic Config) Load() (*FullIdentity, error) {
|
|
c, err := ioutil.ReadFile(ic.CertPath)
|
|
if err != nil {
|
|
return nil, peertls.ErrNotExist.Wrap(err)
|
|
}
|
|
k, err := ioutil.ReadFile(ic.KeyPath)
|
|
if err != nil {
|
|
return nil, peertls.ErrNotExist.Wrap(err)
|
|
}
|
|
fi, err := FullIdentityFromPEM(c, k)
|
|
if err != nil {
|
|
return nil, errs.New("failed to load identity %#v, %#v: %v",
|
|
ic.CertPath, ic.KeyPath, err)
|
|
}
|
|
return fi, nil
|
|
}
|
|
|
|
// Save saves a FullIdentity according to the config
|
|
func (ic Config) Save(fi *FullIdentity) error {
|
|
var (
|
|
certData, keyData bytes.Buffer
|
|
writeChainErr, writeChainDataErr, writeKeyErr, writeKeyDataErr error
|
|
)
|
|
|
|
chain := []*x509.Certificate{fi.Leaf, fi.CA}
|
|
chain = append(chain, fi.RestChain...)
|
|
|
|
if ic.CertPath != "" {
|
|
writeChainErr = peertls.WriteChain(&certData, chain...)
|
|
writeChainDataErr = writeChainData(ic.CertPath, certData.Bytes())
|
|
}
|
|
|
|
if ic.KeyPath != "" {
|
|
writeKeyErr = peertls.WriteKey(&keyData, fi.Key)
|
|
writeKeyDataErr = writeKeyData(ic.KeyPath, keyData.Bytes())
|
|
}
|
|
|
|
writeErr := utils.CombineErrors(writeChainErr, writeKeyErr)
|
|
if writeErr != nil {
|
|
return writeErr
|
|
}
|
|
|
|
return utils.CombineErrors(
|
|
writeChainDataErr,
|
|
writeKeyDataErr,
|
|
)
|
|
}
|
|
|
|
// RestChainRaw returns the rest (excluding leaf and CA) of the certificate chain as a 2d byte slice
|
|
func (fi *FullIdentity) RestChainRaw() [][]byte {
|
|
var chain [][]byte
|
|
for _, cert := range fi.RestChain {
|
|
chain = append(chain, cert.Raw)
|
|
}
|
|
return chain
|
|
}
|
|
|
|
// ServerOption returns a grpc `ServerOption` for incoming connections
|
|
// to the node with this full identity
|
|
func (fi *FullIdentity) ServerOption(pcvFuncs ...peertls.PeerCertVerificationFunc) (grpc.ServerOption, error) {
|
|
ch := [][]byte{fi.Leaf.Raw, fi.CA.Raw}
|
|
ch = append(ch, fi.RestChainRaw()...)
|
|
c, err := peertls.TLSCert(ch, fi.Leaf, fi.Key)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
pcvFuncs = append(
|
|
[]peertls.PeerCertVerificationFunc{peertls.VerifyPeerCertChains},
|
|
pcvFuncs...,
|
|
)
|
|
tlsConfig := &tls.Config{
|
|
Certificates: []tls.Certificate{*c},
|
|
InsecureSkipVerify: true,
|
|
ClientAuth: tls.RequireAnyClientCert,
|
|
VerifyPeerCertificate: peertls.VerifyPeerFunc(
|
|
pcvFuncs...,
|
|
),
|
|
}
|
|
|
|
return grpc.Creds(credentials.NewTLS(tlsConfig)), nil
|
|
}
|
|
|
|
// DialOption returns a grpc `DialOption` for making outgoing connections
|
|
// to the node with this peer identity
|
|
// id is an optional id of the node we are dialing
|
|
func (fi *FullIdentity) DialOption(id storj.NodeID) (grpc.DialOption, error) {
|
|
ch := [][]byte{fi.Leaf.Raw, fi.CA.Raw}
|
|
ch = append(ch, fi.RestChainRaw()...)
|
|
c, err := peertls.TLSCert(ch, fi.Leaf, fi.Key)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
tlsConfig := &tls.Config{
|
|
Certificates: []tls.Certificate{*c},
|
|
InsecureSkipVerify: true,
|
|
VerifyPeerCertificate: peertls.VerifyPeerFunc(
|
|
peertls.VerifyPeerCertChains,
|
|
verifyIdentity(id),
|
|
),
|
|
}
|
|
|
|
return grpc.WithTransportCredentials(credentials.NewTLS(tlsConfig)), nil
|
|
}
|
|
|
|
func verifyIdentity(id storj.NodeID) peertls.PeerCertVerificationFunc {
|
|
return func(_ [][]byte, parsedChains [][]*x509.Certificate) (err error) {
|
|
defer mon.TaskNamed("verifyIdentity")(nil)(&err)
|
|
if id == (storj.NodeID{}) {
|
|
return nil
|
|
}
|
|
|
|
peer, err := PeerIdentityFromCerts(parsedChains[0][0], parsedChains[0][1], parsedChains[0][2:])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if peer.ID.String() != id.String() {
|
|
return Error.New("peer ID did not match requested ID")
|
|
}
|
|
|
|
return nil
|
|
}
|
|
}
|