Golang crypto.Client類代碼示例

// EXP_GetApplicationTCert retrieves an application TCert for the supplied user
func (d *Devops) EXP_GetApplicationTCert(ctx context.Context, secret *pb.Secret) (*pb.Response, error) {
	var sec crypto.Client
	var err error

	if d.isSecurityEnabled {
		if devopsLogger.IsEnabledFor(logging.DEBUG) {
			devopsLogger.Debug("Initializing secure devops using context %s", secret.EnrollId)
		}
		sec, err = crypto.InitClient(secret.EnrollId, nil)
		defer crypto.CloseClient(sec)

		if nil != err {
			return &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(err.Error())}, nil
		}

		devopsLogger.Debug("Getting TCert for id: %s", secret.EnrollId)
		tcertHandler, err := sec.GetTCertificateHandlerNext()
		if nil != err {
			return &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(err.Error())}, nil
		}
		certDER := tcertHandler.GetCertificate()
		return &pb.Response{Status: pb.Response_SUCCESS, Msg: certDER}, nil
	}
	devopsLogger.Warning("Security NOT enabled")
	return &pb.Response{Status: pb.Response_FAILURE, Msg: []byte("Security NOT enabled")}, nil
	// TODO: Handle timeout and expiration
}

// EXP_PrepareForTx prepares a binding/TXHandler pair to be used in subsequent TX
func (d *Devops) EXP_PrepareForTx(ctx context.Context, secret *pb.Secret) (*pb.Response, error) {
	var sec crypto.Client
	var err error
	var txHandler crypto.TransactionHandler
	var binding []byte

	if d.isSecurityEnabled {
		if devopsLogger.IsEnabledFor(logging.DEBUG) {
			devopsLogger.Debug("Initializing secure devops using context %s", secret.EnrollId)
		}
		sec, err = crypto.InitClient(secret.EnrollId, nil)
		defer crypto.CloseClient(sec)

		if nil != err {
			return &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(err.Error())}, nil
		}

		devopsLogger.Debug("Getting TXHandler for id: %s", secret.EnrollId)
		tcertHandler, err := sec.GetTCertificateHandlerNext()
		if nil != err {
			return &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(err.Error())}, nil
		}
		txHandler, err = tcertHandler.GetTransactionHandler()
		binding, err = txHandler.GetBinding()
		if nil != err {
			return &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(err.Error())}, nil
		}
		// Now add to binding map
		d.bindingMap.addBinding(binding, txHandler)
		return &pb.Response{Status: pb.Response_SUCCESS, Msg: binding}, nil
	}
	devopsLogger.Warning("Security NOT enabled")
	return &pb.Response{Status: pb.Response_FAILURE, Msg: []byte("Security NOT enabled")}, nil
	// TODO: Handle timeout and expiration
}

func createTransaction(invokeTx bool, spec *pb.ChaincodeInvocationSpec, uuid string) (*pb.Transaction, error) {
	var tx *pb.Transaction
	var err error
	var sec crypto.Client
	if nil != sec {
		sec, err = crypto.InitClient(spec.ChaincodeSpec.SecureContext, nil)
		defer crypto.CloseClient(sec)
		if nil != err {
			return nil, err
		}
		if invokeTx {
			tx, err = sec.NewChaincodeExecute(spec, uuid)
		} else {
			tx, err = sec.NewChaincodeQuery(spec, uuid)
		}
		if nil != err {
			return nil, err
		}
	} else {
		var t pb.Transaction_Type
		if invokeTx {
			t = pb.Transaction_CHAINCODE_INVOKE
		} else {
			t = pb.Transaction_CHAINCODE_QUERY
		}
		tx, err = pb.NewChaincodeExecute(spec, uuid, t)
		if nil != err {
			return nil, err
		}
	}
	return tx, nil
}

func (d *Devops) createExecTx(spec *pb.ChaincodeInvocationSpec, attributes []string, uuid string, invokeTx bool, sec crypto.Client) (*pb.Transaction, error) {
	var tx *pb.Transaction
	var err error

	//TODO What should we do with the attributes
	if nil != sec {
		if devopsLogger.IsEnabledFor(logging.DEBUG) {
			devopsLogger.Debugf("Creating secure invocation transaction %s", uuid)
		}
		if invokeTx {
			tx, err = sec.NewChaincodeExecute(spec, uuid, attributes...)
		} else {
			tx, err = sec.NewChaincodeQuery(spec, uuid, attributes...)
		}
		if nil != err {
			return nil, err
		}
	} else {
		if devopsLogger.IsEnabledFor(logging.DEBUG) {
			devopsLogger.Debugf("Creating invocation transaction (%s)", uuid)
		}
		var t pb.Transaction_Type
		if invokeTx {
			t = pb.Transaction_CHAINCODE_INVOKE
		} else {
			t = pb.Transaction_CHAINCODE_QUERY
		}
		tx, err = pb.NewChaincodeExecute(spec, uuid, t)
		if nil != err {
			return nil, err
		}
	}
	return tx, nil
}

func deployInternal(deployer crypto.Client, adminCert crypto.CertificateHandler) (resp *pb.Response, err error) {
	// Prepare the spec. The metadata includes the identity of the administrator
	spec := &pb.ChaincodeSpec{
		Type:        1,
		ChaincodeID: &pb.ChaincodeID{Path: "github.com/hyperledger/fabric/examples/chaincode/go/asset_management"},
		//ChaincodeID:          &pb.ChaincodeID{Name: chaincodeName},
		CtorMsg:              &pb.ChaincodeInput{Args: util.ToChaincodeArgs("init")},
		Metadata:             adminCert.GetCertificate(),
		ConfidentialityLevel: confidentialityLevel,
	}

	// First build the deployment spec
	cds, err := getChaincodeBytes(spec)
	if err != nil {
		return nil, fmt.Errorf("Error getting deployment spec: %s ", err)
	}

	// Now create the Transactions message and send to Peer.
	transaction, err := deployer.NewChaincodeDeployTransaction(cds, cds.ChaincodeSpec.ChaincodeID.Name)
	if err != nil {
		return nil, fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	resp, err = processTransaction(transaction)

	appLogger.Debugf("resp [%s]", resp.String())

	chaincodeName = cds.ChaincodeSpec.ChaincodeID.Name
	appLogger.Debugf("ChaincodeName [%s]", chaincodeName)

	return
}

func transferOwnership(owner crypto.Client, ownerCert crypto.CertificateHandler, asset string, newOwnerCert crypto.CertificateHandler) error {
	// Get a transaction handler to be used to submit the execute transaction
	// and bind the chaincode access control logic using the binding

	submittingCertHandler, err := owner.GetTCertificateHandlerNext()
	if err != nil {
		return err
	}
	txHandler, err := submittingCertHandler.GetTransactionHandler()
	if err != nil {
		return err
	}
	binding, err := txHandler.GetBinding()
	if err != nil {
		return err
	}

	chaincodeInput := &pb.ChaincodeInput{Function: "transfer", Args: []string{asset, string(newOwnerCert.GetCertificate())}}
	chaincodeInputRaw, err := proto.Marshal(chaincodeInput)
	if err != nil {
		return err
	}

	// Access control. Owner signs chaincodeInputRaw || binding to confirm his identity
	sigma, err := ownerCert.Sign(append(chaincodeInputRaw, binding...))
	if err != nil {
		return err
	}

	// Prepare spec and submit
	spec := &pb.ChaincodeSpec{
		Type:                 1,
		ChaincodeID:          &pb.ChaincodeID{Name: "mycc"},
		CtorMsg:              chaincodeInput,
		Metadata:             sigma, // Proof of identity
		ConfidentialityLevel: pb.ConfidentialityLevel_PUBLIC,
	}

	var ctx = context.Background()
	chaincodeInvocationSpec := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}

	tid := chaincodeInvocationSpec.ChaincodeSpec.ChaincodeID.Name

	// Now create the Transactions message and send to Peer.
	transaction, err := txHandler.NewChaincodeExecute(chaincodeInvocationSpec, tid)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	ledger, err := ledger.GetLedger()
	ledger.BeginTxBatch("1")
	_, err = chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s", err)
	}
	ledger.CommitTxBatch("1", []*pb.Transaction{transaction}, nil, nil)

	return err

}

// Deploy deploys the supplied chaincode image to the validators through a transaction
func (d *Devops) Deploy(ctx context.Context, spec *pb.ChaincodeSpec) (*pb.ChaincodeDeploymentSpec, error) {
	// get the deployment spec
	chaincodeDeploymentSpec, err := d.getChaincodeBytes(ctx, spec)

	if err != nil {
		devopsLogger.Error(fmt.Sprintf("Error deploying chaincode spec: %v\n\n error: %s", spec, err))
		return nil, err
	}

	// Now create the Transactions message and send to Peer.

	transID := chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeID.Name

	var tx *pb.Transaction
	var sec crypto.Client

	if peer.SecurityEnabled() {
		if devopsLogger.IsEnabledFor(logging.DEBUG) {
			devopsLogger.Debugf("Initializing secure devops using context %s", spec.SecureContext)
		}
		sec, err = crypto.InitClient(spec.SecureContext, nil)
		defer crypto.CloseClient(sec)

		// remove the security context since we are no longer need it down stream
		spec.SecureContext = ""

		if nil != err {
			return nil, err
		}

		if devopsLogger.IsEnabledFor(logging.DEBUG) {
			devopsLogger.Debugf("Creating secure transaction %s", transID)
		}
		tx, err = sec.NewChaincodeDeployTransaction(chaincodeDeploymentSpec, transID, spec.Attributes...)
		if nil != err {
			return nil, err
		}
	} else {
		if devopsLogger.IsEnabledFor(logging.DEBUG) {
			devopsLogger.Debugf("Creating deployment transaction (%s)", transID)
		}
		tx, err = pb.NewChaincodeDeployTransaction(chaincodeDeploymentSpec, transID)
		if err != nil {
			return nil, fmt.Errorf("Error deploying chaincode: %s ", err)
		}
	}

	if devopsLogger.IsEnabledFor(logging.DEBUG) {
		devopsLogger.Debugf("Sending deploy transaction (%s) to validator", tx.Uuid)
	}
	resp := d.coord.ExecuteTransaction(tx)
	if resp.Status == pb.Response_FAILURE {
		err = fmt.Errorf(string(resp.Msg))
	}

	return chaincodeDeploymentSpec, err
}

func (d *Devops) invokeOrQuery(ctx context.Context, chaincodeInvocationSpec *pb.ChaincodeInvocationSpec, attributes []string, invoke bool) (*pb.Response, error) {

	if chaincodeInvocationSpec.ChaincodeSpec.ChaincodeID.Name == "" {
		return nil, fmt.Errorf("name not given for invoke/query")
	}

	// Now create the Transactions message and send to Peer.
	var customIDgenAlg = strings.ToLower(chaincodeInvocationSpec.IdGenerationAlg)
	var id string
	var generr error
	if customIDgenAlg != "" {
		id, generr = util.GenerateIDWithAlg(customIDgenAlg, chaincodeInvocationSpec.ChaincodeSpec.CtorMsg.Args[0])
		if generr != nil {
			return nil, generr
		}
	} else {
		id = util.GenerateUUID()
	}
	devopsLogger.Infof("Transaction ID: %v", id)
	var transaction *pb.Transaction
	var err error
	var sec crypto.Client
	if peer.SecurityEnabled() {
		if devopsLogger.IsEnabledFor(logging.DEBUG) {
			devopsLogger.Debugf("Initializing secure devops using context %s", chaincodeInvocationSpec.ChaincodeSpec.SecureContext)
		}
		sec, err = crypto.InitClient(chaincodeInvocationSpec.ChaincodeSpec.SecureContext, nil)
		defer crypto.CloseClient(sec)
		// remove the security context since we are no longer need it down stream
		chaincodeInvocationSpec.ChaincodeSpec.SecureContext = ""
		if nil != err {
			return nil, err
		}
	}

	transaction, err = d.createExecTx(chaincodeInvocationSpec, attributes, id, invoke, sec)
	if err != nil {
		return nil, err
	}
	if devopsLogger.IsEnabledFor(logging.DEBUG) {
		devopsLogger.Debugf("Sending invocation transaction (%s) to validator", transaction.Uuid)
	}
	resp := d.coord.ExecuteTransaction(transaction)
	if resp.Status == pb.Response_FAILURE {
		err = fmt.Errorf(string(resp.Msg))
	} else {
		if !invoke && nil != sec && viper.GetBool("security.privacy") {
			if resp.Msg, err = sec.DecryptQueryResult(transaction, resp.Msg); nil != err {
				devopsLogger.Errorf("Failed decrypting query transaction result %s", string(resp.Msg[:]))
				//resp = &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(err.Error())}
			}
		}
	}
	return resp, err
}

func transferOwnership(owner crypto.Client, ownerCert crypto.CertificateHandler, fromAttributes string,
	newOwnerCert crypto.CertificateHandler, toAttributes string, amount string) error {
	// Get a transaction handler to be used to submit the execute transaction
	// and bind the chaincode access control logic using the binding

	submittingCertHandler, err := owner.GetTCertificateHandlerNext("role")
	if err != nil {
		return err
	}
	txHandler, err := submittingCertHandler.GetTransactionHandler()
	if err != nil {
		return err
	}

	chaincodeInput := &pb.ChaincodeInput{Args: util.ToChaincodeArgs(
		"transferOwnership",
		base64.StdEncoding.EncodeToString(ownerCert.GetCertificate()),
		fromAttributes,
		base64.StdEncoding.EncodeToString(newOwnerCert.GetCertificate()),
		toAttributes,
		amount)}

	// Prepare spec and submit
	spec := &pb.ChaincodeSpec{
		Type:                 1,
		ChaincodeID:          &pb.ChaincodeID{Name: "mycc"},
		CtorMsg:              chaincodeInput,
		ConfidentialityLevel: pb.ConfidentialityLevel_PUBLIC,
	}

	var ctx = context.Background()
	chaincodeInvocationSpec := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}

	tid := chaincodeInvocationSpec.ChaincodeSpec.ChaincodeID.Name

	// Now create the Transactions message and send to Peer.
	transaction, err := txHandler.NewChaincodeExecute(chaincodeInvocationSpec, tid)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	ledger, err := ledger.GetLedger()
	ledger.BeginTxBatch("1")
	_, _, err = chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s", err)
	}
	ledger.CommitTxBatch("1", []*pb.Transaction{transaction}, nil, nil)

	return err

}

func transferOwnershipInternal(owner crypto.Client, ownerCert crypto.CertificateHandler, asset string, newOwnerCert crypto.CertificateHandler) (resp *pb.Response, err error) {
	// Get a transaction handler to be used to submit the execute transaction
	// and bind the chaincode access control logic using the binding

	submittingCertHandler, err := owner.GetTCertificateHandlerNext()
	if err != nil {
		return nil, err
	}
	txHandler, err := submittingCertHandler.GetTransactionHandler()
	if err != nil {
		return nil, err
	}
	binding, err := txHandler.GetBinding()
	if err != nil {
		return nil, err
	}

	chaincodeInput := &pb.ChaincodeInput{
		Function: "transfer",
		Args:     []string{asset, base64.StdEncoding.EncodeToString(newOwnerCert.GetCertificate())},
	}
	chaincodeInputRaw, err := proto.Marshal(chaincodeInput)
	if err != nil {
		return nil, err
	}

	// Access control. Owner signs chaincodeInputRaw || binding to confirm his identity
	sigma, err := ownerCert.Sign(append(chaincodeInputRaw, binding...))
	if err != nil {
		return nil, err
	}

	// Prepare spec and submit
	spec := &pb.ChaincodeSpec{
		Type:                 1,
		ChaincodeID:          &pb.ChaincodeID{Name: chaincodeName},
		CtorMsg:              chaincodeInput,
		Metadata:             sigma, // Proof of identity
		ConfidentialityLevel: confidentialityLevel,
	}

	chaincodeInvocationSpec := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}

	// Now create the Transactions message and send to Peer.
	transaction, err := txHandler.NewChaincodeExecute(chaincodeInvocationSpec, util.GenerateUUID())
	if err != nil {
		return nil, fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	return processTransaction(transaction)

}

// EXP_ProduceSigma produces a sigma as []byte and returns in response
func (d *Devops) EXP_ProduceSigma(ctx context.Context, sigmaInput *pb.SigmaInput) (*pb.Response, error) {
	var sec crypto.Client
	var err error
	var sigma []byte
	secret := sigmaInput.Secret

	type RBACMetatdata struct {
		Cert  []byte
		Sigma []byte
	}

	if d.isSecurityEnabled {
		if devopsLogger.IsEnabledFor(logging.DEBUG) {
			devopsLogger.Debug("Initializing secure devops using context %s", secret.EnrollId)
		}
		sec, err = crypto.InitClient(secret.EnrollId, nil)
		defer crypto.CloseClient(sec)

		if nil != err {
			return &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(err.Error())}, nil
		}

		devopsLogger.Debug("Getting TCertHandler for id: %s, from DER = %s", secret.EnrollId, sigmaInput.AppTCert)
		tcertHandler, err := sec.GetTCertificateHandlerFromDER(sigmaInput.AppTCert)
		//tcertHandler, err := sec.GetTCertificateHandlerNext()
		if nil != err {
			return &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(fmt.Errorf("Error getting TCertHandler from DER:  %s", err).Error())}, nil
		}
		tcert := sigmaInput.AppTCert //tcertHandler.GetCertificate()
		sigma, err = tcertHandler.Sign(append(tcert, sigmaInput.Data...))
		if nil != err {
			return &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(fmt.Errorf("Error signing with TCertHandler from DER:  %s", err).Error())}, nil
		}
		// Produce the SigmaOutput
		asn1Encoding, err := asn1.Marshal(RBACMetatdata{Cert: tcert, Sigma: sigma})
		if nil != err {
			return &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(err.Error())}, nil
		}
		sigmaOutput := &pb.SigmaOutput{Tcert: tcert, Sigma: sigma, Asn1Encoding: asn1Encoding}
		sigmaOutputBytes, err := proto.Marshal(sigmaOutput)
		if nil != err {
			return &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(err.Error())}, nil
		}
		return &pb.Response{Status: pb.Response_SUCCESS, Msg: sigmaOutputBytes}, nil
	}
	devopsLogger.Warning("Security NOT enabled")
	return &pb.Response{Status: pb.Response_FAILURE, Msg: []byte("Security NOT enabled")}, nil

}

func whoIsTheOwner(invoker crypto.Client, asset string) (transaction *pb.Transaction, resp *pb.Response, err error) {
	chaincodeInput := &pb.ChaincodeInput{Args: util.ToChaincodeArgs("query", asset)}

	// Prepare spec and submit
	spec := &pb.ChaincodeSpec{
		Type:                 1,
		ChaincodeID:          &pb.ChaincodeID{Name: chaincodeName},
		CtorMsg:              chaincodeInput,
		ConfidentialityLevel: confidentialityLevel,
	}

	chaincodeInvocationSpec := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}

	// Now create the Transactions message and send to Peer.
	transaction, err = invoker.NewChaincodeQuery(chaincodeInvocationSpec, util.GenerateUUID())
	if err != nil {
		return nil, nil, fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	resp, err = processTransaction(transaction)
	return
}

func createDeployTransaction(dspec *pb.ChaincodeDeploymentSpec, uuid string) (*pb.Transaction, error) {
	var tx *pb.Transaction
	var err error
	var sec crypto.Client
	if dspec.ChaincodeSpec.SecureContext != "" {
		sec, err = crypto.InitClient(dspec.ChaincodeSpec.SecureContext, nil)
		defer crypto.CloseClient(sec)

		if nil != err {
			return nil, err
		}

		tx, err = sec.NewChaincodeDeployTransaction(dspec, uuid)
		if nil != err {
			return nil, err
		}
	} else {
		tx, err = pb.NewChaincodeDeployTransaction(dspec, uuid)
		if err != nil {
			return nil, fmt.Errorf("Error deploying chaincode: %s ", err)
		}
	}
	return tx, nil
}

func read(invoker crypto.Client, invokerCert crypto.CertificateHandler) ([]byte, error) {
	// Get a transaction handler to be used to submit the query transaction
	// and bind the chaincode access control logic using the binding

	submittingCertHandler, err := invoker.GetTCertificateHandlerNext()
	if err != nil {
		return nil, err
	}
	txHandler, err := submittingCertHandler.GetTransactionHandler()
	if err != nil {
		return nil, err
	}
	binding, err := txHandler.GetBinding()
	if err != nil {
		return nil, err
	}

	chaincodeInput := &pb.ChaincodeInput{Args: util.ToChaincodeArgs("read")}
	chaincodeInputRaw, err := proto.Marshal(chaincodeInput)
	if err != nil {
		return nil, err
	}

	// Access control:
	// invokerCert signs invokerCert.GetCertificate() || chaincodeInputRaw || binding to confirm his identity
	sigma, err := invokerCert.Sign(append(invokerCert.GetCertificate(), append(chaincodeInputRaw, binding...)...))
	if err != nil {
		return nil, err
	}

	rbacMetadata := RBACMetadata{invokerCert.GetCertificate(), sigma}
	rbacMetadataRaw, err := asn1.Marshal(rbacMetadata)
	if err != nil {
		return nil, err
	}

	// Prepare spec and submit
	spec := &pb.ChaincodeSpec{
		Type:                 1,
		ChaincodeID:          &pb.ChaincodeID{Name: "mycc"},
		CtorMsg:              chaincodeInput,
		Metadata:             rbacMetadataRaw,
		ConfidentialityLevel: pb.ConfidentialityLevel_PUBLIC,
	}

	var ctx = context.Background()
	chaincodeInvocationSpec := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}

	tid := chaincodeInvocationSpec.ChaincodeSpec.ChaincodeID.Name

	// Now create the Transactions message and send to Peer.
	transaction, err := txHandler.NewChaincodeQuery(chaincodeInvocationSpec, tid)
	if err != nil {
		return nil, fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	ledger, err := ledger.GetLedger()
	ledger.BeginTxBatch("1")
	result, _, err := chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
	if err != nil {
		return nil, fmt.Errorf("Error deploying chaincode: %s", err)
	}
	ledger.CommitTxBatch("1", []*pb.Transaction{transaction}, nil, nil)

	return result, err
}