forked from hyperledger-archives/fabric
/
node_eca.go
executable file
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/
node_eca.go
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/*
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you 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 crypto
import (
"crypto/ecdsa"
"crypto/rand"
"crypto/x509"
obcca "github.com/openblockchain/obc-peer/obc-ca/protos"
protobuf "google/protobuf"
"time"
"encoding/asn1"
"errors"
"github.com/golang/protobuf/proto"
ecies "github.com/openblockchain/obc-peer/openchain/crypto/ecies/generic"
"github.com/openblockchain/obc-peer/openchain/crypto/utils"
"golang.org/x/net/context"
"google.golang.org/grpc"
"io/ioutil"
)
var (
// ECertSubjectRole is the ASN1 object identifier of the subject's role.
ECertSubjectRole = asn1.ObjectIdentifier{2, 1, 3, 4, 5, 6, 7}
)
func (node *nodeImpl) retrieveECACertsChain(userID string) error {
// Retrieve ECA certificate and verify it
ecaCertRaw, err := node.getECACertificate()
if err != nil {
node.log.Error("Failed getting ECA certificate [%s].", err.Error())
return err
}
node.log.Debug("ECA certificate [%s].", utils.EncodeBase64(ecaCertRaw))
// TODO: Test ECA cert againt root CA
// TODO: check responce.Cert against rootCA
x509ECACert, err := utils.DERToX509Certificate(ecaCertRaw)
if err != nil {
node.log.Error("Failed parsing ECA certificate [%s].", err.Error())
return err
}
// Prepare ecaCertPool
node.ecaCertPool = x509.NewCertPool()
node.ecaCertPool.AddCert(x509ECACert)
// Store ECA cert
node.log.Debug("Storing ECA certificate for [%s]...", userID)
if err := node.ks.storeCert(node.conf.getECACertsChainFilename(), ecaCertRaw); err != nil {
node.log.Error("Failed storing eca certificate [%s].", err.Error())
return err
}
return nil
}
func (node *nodeImpl) retrieveEnrollmentData(enrollID, enrollPWD string) error {
key, enrollCertRaw, enrollChainKey, err := node.getEnrollmentCertificateFromECA(enrollID, enrollPWD)
if err != nil {
node.log.Error("Failed getting enrollment certificate [id=%s]: [%s]", enrollID, err)
return err
}
node.log.Debug("Enrollment certificate [%s].", utils.EncodeBase64(enrollCertRaw))
node.log.Debug("Storing enrollment data for user [%s]...", enrollID)
// Store enrollment id
err = ioutil.WriteFile(node.conf.getEnrollmentIDPath(), []byte(enrollID), 0700)
if err != nil {
node.log.Error("Failed storing enrollment certificate [id=%s]: [%s]", enrollID, err)
return err
}
// Store enrollment key
if err := node.ks.storePrivateKey(node.conf.getEnrollmentKeyFilename(), key); err != nil {
node.log.Error("Failed storing enrollment key [id=%s]: [%s]", enrollID, err)
return err
}
// Store enrollment cert
if err := node.ks.storeCert(node.conf.getEnrollmentCertFilename(), enrollCertRaw); err != nil {
node.log.Error("Failed storing enrollment certificate [id=%s]: [%s]", enrollID, err)
return err
}
// Store enrollment chain key
if err := node.ks.storeKey(node.conf.getEnrollmentChainKeyFilename(), enrollChainKey); err != nil {
node.log.Error("Failed storing enrollment chain key [id=%s]: [%s]", enrollID, err)
return err
}
return nil
}
func (node *nodeImpl) loadEnrollmentKey() error {
node.log.Debug("Loading enrollment key...")
enrollPrivKey, err := node.ks.loadPrivateKey(node.conf.getEnrollmentKeyFilename())
if err != nil {
node.log.Error("Failed loading enrollment private key [%s].", err.Error())
return err
}
node.enrollPrivKey = enrollPrivKey.(*ecdsa.PrivateKey)
return nil
}
func (node *nodeImpl) loadEnrollmentCertificate() error {
node.log.Debug("Loading enrollment certificate...")
cert, der, err := node.ks.loadCertX509AndDer(node.conf.getEnrollmentCertFilename())
if err != nil {
node.log.Error("Failed parsing enrollment certificate [%s].", err.Error())
return err
}
node.enrollCert = cert
// TODO: move this to retrieve
pk := node.enrollCert.PublicKey.(*ecdsa.PublicKey)
err = utils.VerifySignCapability(node.enrollPrivKey, pk)
if err != nil {
node.log.Error("Failed checking enrollment certificate against enrollment key [%s].", err.Error())
return err
}
// Set node ID
node.id = utils.Hash(der)
node.log.Debug("Setting id to [%s].", utils.EncodeBase64(node.id))
// Set eCertHash
node.enrollCertHash = utils.Hash(der)
node.log.Debug("Setting enrollCertHash to [%s].", utils.EncodeBase64(node.enrollCertHash))
return nil
}
func (node *nodeImpl) loadEnrollmentID() error {
node.log.Debug("Loading enrollment id at [%s]...", node.conf.getEnrollmentIDPath())
enrollID, err := ioutil.ReadFile(node.conf.getEnrollmentIDPath())
if err != nil {
node.log.Error("Failed loading enrollment id [%s].", err.Error())
return err
}
// Set enrollment ID
node.enrollID = string(enrollID)
node.log.Debug("Setting enrollment id to [%s].", node.enrollID)
return nil
}
func (node *nodeImpl) loadEnrollmentChainKey() error {
node.log.Debug("Loading enrollment chain key...")
enrollChainKey, err := node.ks.loadKey(node.conf.getEnrollmentChainKeyFilename())
if err != nil {
node.log.Error("Failed loading enrollment chain key [%s].", err.Error())
return err
}
node.enrollChainKey = enrollChainKey
return nil
}
func (node *nodeImpl) loadECACertsChain() error {
node.log.Debug("Loading ECA certificates chain...")
pem, err := node.ks.loadCert(node.conf.getECACertsChainFilename())
if err != nil {
node.log.Error("Failed loading ECA certificates chain [%s].", err.Error())
return err
}
ok := node.ecaCertPool.AppendCertsFromPEM(pem)
if !ok {
node.log.Error("Failed appending ECA certificates chain.")
return errors.New("Failed appending ECA certificates chain.")
}
return nil
}
func (node *nodeImpl) getECAClient() (*grpc.ClientConn, obcca.ECAPClient, error) {
node.log.Debug("Getting ECA client...")
conn, err := node.getClientConn(node.conf.getECAPAddr(), node.conf.getECAServerName())
if err != nil {
node.log.Error("Failed getting client connection: [%s]", err)
}
client := obcca.NewECAPClient(conn)
node.log.Debug("Getting ECA client...done")
return conn, client, nil
}
func (node *nodeImpl) callECAReadCACertificate(ctx context.Context, opts ...grpc.CallOption) (*obcca.Cert, error) {
// Get an ECA Client
sock, ecaP, err := node.getECAClient()
defer sock.Close()
// Issue the request
cert, err := ecaP.ReadCACertificate(ctx, &obcca.Empty{}, opts...)
if err != nil {
node.log.Error("Failed requesting read certificate [%s].", err.Error())
return nil, err
}
return cert, nil
}
func (node *nodeImpl) callECAReadCertificate(ctx context.Context, in *obcca.ECertReadReq, opts ...grpc.CallOption) (*obcca.CertPair, error) {
// Get an ECA Client
sock, ecaP, err := node.getECAClient()
defer sock.Close()
// Issue the request
resp, err := ecaP.ReadCertificatePair(ctx, in, opts...)
if err != nil {
node.log.Error("Failed requesting read certificate [%s].", err.Error())
return nil, err
}
return resp, nil
}
func (node *nodeImpl) callECAReadCertificateByHash(ctx context.Context, in *obcca.Hash, opts ...grpc.CallOption) (*obcca.CertPair, error) {
// Get an ECA Client
sock, ecaP, err := node.getECAClient()
defer sock.Close()
// Issue the request
resp, err := ecaP.ReadCertificateByHash(ctx, in, opts...)
if err != nil {
node.log.Error("Failed requesting read certificate [%s].", err.Error())
return nil, err
}
return &obcca.CertPair{resp.Cert, nil}, nil
}
func (node *nodeImpl) getEnrollmentCertificateFromECA(id, pw string) (interface{}, []byte, []byte, error) {
// Get a new ECA Client
sock, ecaP, err := node.getECAClient()
defer sock.Close()
// Run the protocol
signPriv, err := utils.NewECDSAKey()
if err != nil {
node.log.Error("Failed generating ECDSA key [%s].", err.Error())
return nil, nil, nil, err
}
signPub, err := x509.MarshalPKIXPublicKey(&signPriv.PublicKey)
if err != nil {
node.log.Error("Failed mashalling ECDSA key [%s].", err.Error())
return nil, nil, nil, err
}
encPriv, err := utils.NewECDSAKey()
if err != nil {
node.log.Error("Failed generating Encryption key [%s].", err.Error())
return nil, nil, nil, err
}
encPub, err := x509.MarshalPKIXPublicKey(&encPriv.PublicKey)
if err != nil {
node.log.Error("Failed marshalling Encryption key [%s].", err.Error())
return nil, nil, nil, err
}
req := &obcca.ECertCreateReq{&protobuf.Timestamp{Seconds: time.Now().Unix(), Nanos: 0},
&obcca.Identity{id},
&obcca.Token{Tok: []byte(pw)},
&obcca.PublicKey{obcca.CryptoType_ECDSA, signPub},
&obcca.PublicKey{obcca.CryptoType_ECDSA, encPub},
nil}
resp, err := ecaP.CreateCertificatePair(context.Background(), req)
if err != nil {
node.log.Error("Failed invoking CreateCertficatePair [%s].", err.Error())
return nil, nil, nil, err
}
//out, err := rsa.DecryptPKCS1v15(rand.Reader, encPriv, resp.Tok.Tok)
spi := ecies.NewSPI()
eciesKey, err := spi.NewPrivateKey(nil, encPriv)
if err != nil {
node.log.Error("Failed parsing decrypting key [%s].", err.Error())
return nil, nil, nil, err
}
ecies, err := spi.NewAsymmetricCipherFromPublicKey(eciesKey)
if err != nil {
node.log.Error("Failed creating asymmetrinc cipher [%s].", err.Error())
return nil, nil, nil, err
}
out, err := ecies.Process(resp.Tok.Tok)
if err != nil {
node.log.Error("Failed decrypting toke [%s].", err.Error())
return nil, nil, nil, err
}
req.Tok.Tok = out
req.Sig = nil
hash := utils.NewHash()
raw, _ := proto.Marshal(req)
hash.Write(raw)
r, s, err := ecdsa.Sign(rand.Reader, signPriv, hash.Sum(nil))
if err != nil {
node.log.Error("Failed signing [%s].", err.Error())
return nil, nil, nil, err
}
R, _ := r.MarshalText()
S, _ := s.MarshalText()
req.Sig = &obcca.Signature{obcca.CryptoType_ECDSA, R, S}
resp, err = ecaP.CreateCertificatePair(context.Background(), req)
if err != nil {
node.log.Error("Failed invoking CreateCertificatePair [%s].", err.Error())
return nil, nil, nil, err
}
// Verify response
// Verify cert for signing
node.log.Debug("Enrollment certificate for signing [%s]", utils.EncodeBase64(utils.Hash(resp.Certs.Sign)))
x509SignCert, err := utils.DERToX509Certificate(resp.Certs.Sign)
if err != nil {
node.log.Error("Failed parsing signing enrollment certificate for signing: [%s]", err)
return nil, nil, nil, err
}
_, err = utils.GetCriticalExtension(x509SignCert, ECertSubjectRole)
if err != nil {
node.log.Error("Failed parsing ECertSubjectRole in enrollment certificate for signing: [%s]", err)
return nil, nil, nil, err
}
err = utils.CheckCertAgainstSKAndRoot(x509SignCert, signPriv, node.ecaCertPool)
if err != nil {
node.log.Error("Failed checking signing enrollment certificate for signing: [%s]", err)
return nil, nil, nil, err
}
// Verify cert for encrypting
node.log.Debug("Enrollment certificate for encrypting [%s]", utils.EncodeBase64(utils.Hash(resp.Certs.Enc)))
x509EncCert, err := utils.DERToX509Certificate(resp.Certs.Enc)
if err != nil {
node.log.Error("Failed parsing signing enrollment certificate for encrypting: [%s]", err)
return nil, nil, nil, err
}
_, err = utils.GetCriticalExtension(x509EncCert, ECertSubjectRole)
if err != nil {
node.log.Error("Failed parsing ECertSubjectRole in enrollment certificate for encrypting: [%s]", err)
return nil, nil, nil, err
}
err = utils.CheckCertAgainstSKAndRoot(x509EncCert, encPriv, node.ecaCertPool)
if err != nil {
node.log.Error("Failed checking signing enrollment certificate for encrypting: [%s]", err)
return nil, nil, nil, err
}
// END
return signPriv, resp.Certs.Sign, resp.Chain.Tok, nil
}
func (node *nodeImpl) getECACertificate() ([]byte, error) {
responce, err := node.callECAReadCACertificate(context.Background())
if err != nil {
node.log.Error("Failed requesting ECA certificate [%s].", err.Error())
return nil, err
}
return responce.Cert, nil
}