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validation_logic.go
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validation_logic.go
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/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package v12
import (
"bytes"
"fmt"
"regexp"
"github.com/golang/protobuf/proto"
"github.com/hyperledger/fabric/common/channelconfig"
commonerrors "github.com/hyperledger/fabric/common/errors"
"github.com/hyperledger/fabric/common/flogging"
"github.com/hyperledger/fabric/core/chaincode/platforms"
"github.com/hyperledger/fabric/core/chaincode/platforms/car"
"github.com/hyperledger/fabric/core/chaincode/platforms/ccmetadata"
"github.com/hyperledger/fabric/core/chaincode/platforms/golang"
"github.com/hyperledger/fabric/core/chaincode/platforms/java"
"github.com/hyperledger/fabric/core/chaincode/platforms/node"
"github.com/hyperledger/fabric/core/common/ccprovider"
"github.com/hyperledger/fabric/core/common/privdata"
. "github.com/hyperledger/fabric/core/handlers/validation/api/capabilities"
. "github.com/hyperledger/fabric/core/handlers/validation/api/identities"
. "github.com/hyperledger/fabric/core/handlers/validation/api/policies"
. "github.com/hyperledger/fabric/core/handlers/validation/api/state"
"github.com/hyperledger/fabric/core/ledger/kvledger/txmgmt/rwsetutil"
"github.com/hyperledger/fabric/core/scc/lscc"
"github.com/hyperledger/fabric/protos/common"
"github.com/hyperledger/fabric/protos/ledger/rwset/kvrwset"
"github.com/hyperledger/fabric/protos/msp"
pb "github.com/hyperledger/fabric/protos/peer"
"github.com/hyperledger/fabric/protos/utils"
"github.com/pkg/errors"
)
var logger = flogging.MustGetLogger("vscc")
const (
DUPLICATED_IDENTITY_ERROR = "Endorsement policy evaluation failure might be caused by duplicated identities"
)
var validCollectionNameRegex = regexp.MustCompile(ccmetadata.AllowedCharsCollectionName)
//go:generate mockery -dir ../../api/capabilities/ -name Capabilities -case underscore -output mocks/
//go:generate mockery -dir ../../api/state/ -name StateFetcher -case underscore -output mocks/
//go:generate mockery -dir ../../api/identities/ -name IdentityDeserializer -case underscore -output mocks/
//go:generate mockery -dir ../../api/policies/ -name PolicyEvaluator -case underscore -output mocks/
// New creates a new instance of the default VSCC
// Typically this will only be invoked once per peer
func New(c Capabilities, s StateFetcher, d IdentityDeserializer, pe PolicyEvaluator) *Validator {
return &Validator{
capabilities: c,
stateFetcher: s,
deserializer: d,
policyEvaluator: pe,
}
}
// Validator implements the default transaction validation policy,
// which is to check the correctness of the read-write set and the endorsement
// signatures against an endorsement policy that is supplied as argument to
// every invoke
type Validator struct {
deserializer IdentityDeserializer
capabilities Capabilities
stateFetcher StateFetcher
policyEvaluator PolicyEvaluator
}
// Validate validates the given envelope corresponding to a transaction with an endorsement
// policy as given in its serialized form
func (vscc *Validator) Validate(
block *common.Block,
namespace string,
txPosition int,
actionPosition int,
policyBytes []byte,
) commonerrors.TxValidationError {
// get the envelope...
env, err := utils.GetEnvelopeFromBlock(block.Data.Data[txPosition])
if err != nil {
logger.Errorf("VSCC error: GetEnvelope failed, err %s", err)
return policyErr(err)
}
// ...and the payload...
payl, err := utils.GetPayload(env)
if err != nil {
logger.Errorf("VSCC error: GetPayload failed, err %s", err)
return policyErr(err)
}
chdr, err := utils.UnmarshalChannelHeader(payl.Header.ChannelHeader)
if err != nil {
return policyErr(err)
}
// validate the payload type
if common.HeaderType(chdr.Type) != common.HeaderType_ENDORSER_TRANSACTION {
logger.Errorf("Only Endorser Transactions are supported, provided type %d", chdr.Type)
return policyErr(fmt.Errorf("Only Endorser Transactions are supported, provided type %d", chdr.Type))
}
// ...and the transaction...
tx, err := utils.GetTransaction(payl.Data)
if err != nil {
logger.Errorf("VSCC error: GetTransaction failed, err %s", err)
return policyErr(err)
}
cap, err := utils.GetChaincodeActionPayload(tx.Actions[actionPosition].Payload)
if err != nil {
logger.Errorf("VSCC error: GetChaincodeActionPayload failed, err %s", err)
return policyErr(err)
}
signatureSet, err := vscc.deduplicateIdentity(cap)
if err != nil {
return policyErr(err)
}
// evaluate the signature set against the policy
err = vscc.policyEvaluator.Evaluate(policyBytes, signatureSet)
if err != nil {
logger.Warningf("Endorsement policy failure for transaction txid=%s, err: %s", chdr.GetTxId(), err.Error())
if len(signatureSet) < len(cap.Action.Endorsements) {
// Warning: duplicated identities exist, endorsement failure might be cause by this reason
return policyErr(errors.New(DUPLICATED_IDENTITY_ERROR))
}
return policyErr(fmt.Errorf("VSCC error: endorsement policy failure, err: %s", err))
}
// do some extra validation that is specific to lscc
if namespace == "lscc" {
logger.Debugf("VSCC info: doing special validation for LSCC")
err := vscc.ValidateLSCCInvocation(chdr.ChannelId, env, cap, payl, vscc.capabilities)
if err != nil {
logger.Errorf("VSCC error: ValidateLSCCInvocation failed, err %s", err)
return err
}
}
return nil
}
// checkInstantiationPolicy evaluates an instantiation policy against a signed proposal
func (vscc *Validator) checkInstantiationPolicy(chainName string, env *common.Envelope, instantiationPolicy []byte, payl *common.Payload) commonerrors.TxValidationError {
// get the signature header
shdr, err := utils.GetSignatureHeader(payl.Header.SignatureHeader)
if err != nil {
return policyErr(err)
}
// construct signed data we can evaluate the instantiation policy against
sd := []*common.SignedData{{
Data: env.Payload,
Identity: shdr.Creator,
Signature: env.Signature,
}}
err = vscc.policyEvaluator.Evaluate(instantiationPolicy, sd)
if err != nil {
return policyErr(fmt.Errorf("chaincode instantiation policy violated, error %s", err))
}
return nil
}
func validateNewCollectionConfigs(newCollectionConfigs []*common.CollectionConfig) error {
newCollectionsMap := make(map[string]bool, len(newCollectionConfigs))
// Process each collection config from a set of collection configs
for _, newCollectionConfig := range newCollectionConfigs {
newCollection := newCollectionConfig.GetStaticCollectionConfig()
if newCollection == nil {
return errors.New("unknown collection configuration type")
}
// Ensure that there are no duplicate collection names
collectionName := newCollection.GetName()
if err := validateCollectionName(collectionName); err != nil {
return err
}
if _, ok := newCollectionsMap[collectionName]; !ok {
newCollectionsMap[collectionName] = true
} else {
return fmt.Errorf("collection-name: %s -- found duplicate collection configuration", collectionName)
}
// Validate gossip related parameters present in the collection config
maximumPeerCount := newCollection.GetMaximumPeerCount()
requiredPeerCount := newCollection.GetRequiredPeerCount()
if maximumPeerCount < requiredPeerCount {
return fmt.Errorf("collection-name: %s -- maximum peer count (%d) cannot be greater than the required peer count (%d)",
collectionName, maximumPeerCount, requiredPeerCount)
}
if requiredPeerCount < 0 {
return fmt.Errorf("collection-name: %s -- requiredPeerCount (%d) cannot be less than zero (%d)",
collectionName, maximumPeerCount, requiredPeerCount)
}
// make sure that the signature policy is meaningful (only consists of ORs)
err := validateSpOrConcat(newCollection.MemberOrgsPolicy.GetSignaturePolicy().Rule)
if err != nil {
return errors.WithMessage(err, fmt.Sprintf("collection-name: %s -- error in member org policy", collectionName))
}
}
return nil
}
// validateSpOrConcat checks if the supplied signature policy is just an OR-concatenation of identities
func validateSpOrConcat(sp *common.SignaturePolicy) error {
if sp.GetNOutOf() == nil {
return nil
}
// check if N == 1 (OR concatenation)
if sp.GetNOutOf().N != 1 {
return errors.New(fmt.Sprintf("signature policy is not an OR concatenation, NOutOf %d", sp.GetNOutOf().N))
}
// recurse into all sub-rules
for _, rule := range sp.GetNOutOf().Rules {
err := validateSpOrConcat(rule)
if err != nil {
return err
}
}
return nil
}
func checkForMissingCollections(newCollectionsMap map[string]*common.StaticCollectionConfig, oldCollectionConfigs []*common.CollectionConfig,
) error {
var missingCollections []string
// In the new collection config package, ensure that there is one entry per old collection. Any
// number of new collections are allowed.
for _, oldCollectionConfig := range oldCollectionConfigs {
oldCollection := oldCollectionConfig.GetStaticCollectionConfig()
// It cannot be nil
if oldCollection == nil {
return policyErr(fmt.Errorf("unknown collection configuration type"))
}
// All old collection must exist in the new collection config package
oldCollectionName := oldCollection.GetName()
_, ok := newCollectionsMap[oldCollectionName]
if !ok {
missingCollections = append(missingCollections, oldCollectionName)
}
}
if len(missingCollections) > 0 {
return policyErr(fmt.Errorf("the following existing collections are missing in the new collection configuration package: %v",
missingCollections))
}
return nil
}
func checkForModifiedCollectionsBTL(newCollectionsMap map[string]*common.StaticCollectionConfig, oldCollectionConfigs []*common.CollectionConfig,
) error {
var modifiedCollectionsBTL []string
// In the new collection config package, ensure that the block to live value is not
// modified for the existing collections.
for _, oldCollectionConfig := range oldCollectionConfigs {
oldCollection := oldCollectionConfig.GetStaticCollectionConfig()
// It cannot be nil
if oldCollection == nil {
return policyErr(fmt.Errorf("unknown collection configuration type"))
}
oldCollectionName := oldCollection.GetName()
newCollection, _ := newCollectionsMap[oldCollectionName]
// BlockToLive cannot be changed
if newCollection.GetBlockToLive() != oldCollection.GetBlockToLive() {
modifiedCollectionsBTL = append(modifiedCollectionsBTL, oldCollectionName)
}
}
if len(modifiedCollectionsBTL) > 0 {
return policyErr(fmt.Errorf("the BlockToLive in the following existing collections must not be modified: %v",
modifiedCollectionsBTL))
}
return nil
}
func validateNewCollectionConfigsAgainstOld(newCollectionConfigs []*common.CollectionConfig, oldCollectionConfigs []*common.CollectionConfig,
) error {
newCollectionsMap := make(map[string]*common.StaticCollectionConfig, len(newCollectionConfigs))
for _, newCollectionConfig := range newCollectionConfigs {
newCollection := newCollectionConfig.GetStaticCollectionConfig()
// Collection object itself is stored as value so that we can
// check whether the block to live is changed -- FAB-7810
newCollectionsMap[newCollection.GetName()] = newCollection
}
if err := checkForMissingCollections(newCollectionsMap, oldCollectionConfigs); err != nil {
return err
}
if err := checkForModifiedCollectionsBTL(newCollectionsMap, oldCollectionConfigs); err != nil {
return err
}
return nil
}
func validateCollectionName(collectionName string) error {
if collectionName == "" {
return fmt.Errorf("empty collection-name is not allowed")
}
match := validCollectionNameRegex.FindString(collectionName)
if len(match) != len(collectionName) {
return fmt.Errorf("collection-name: %s not allowed. A valid collection name follows the pattern: %s",
collectionName, ccmetadata.AllowedCharsCollectionName)
}
return nil
}
// validateRWSetAndCollection performs validation of the rwset
// of an LSCC deploy operation and then it validates any collection
// configuration
func (vscc *Validator) validateRWSetAndCollection(
lsccrwset *kvrwset.KVRWSet,
cdRWSet *ccprovider.ChaincodeData,
lsccArgs [][]byte,
lsccFunc string,
ac channelconfig.ApplicationCapabilities,
channelName string,
) commonerrors.TxValidationError {
/********************************************/
/* security check 0.a - validation of rwset */
/********************************************/
// there can only be one or two writes
if len(lsccrwset.Writes) > 2 {
return policyErr(fmt.Errorf("LSCC can only issue one or two putState upon deploy"))
}
/**********************************************************/
/* security check 0.b - validation of the collection data */
/**********************************************************/
var collectionsConfigArg []byte
if len(lsccArgs) > 5 {
collectionsConfigArg = lsccArgs[5]
}
var collectionsConfigLedger []byte
if len(lsccrwset.Writes) == 2 {
key := privdata.BuildCollectionKVSKey(cdRWSet.Name)
if lsccrwset.Writes[1].Key != key {
return policyErr(fmt.Errorf("invalid key for the collection of chaincode %s:%s; expected '%s', received '%s'",
cdRWSet.Name, cdRWSet.Version, key, lsccrwset.Writes[1].Key))
}
collectionsConfigLedger = lsccrwset.Writes[1].Value
}
if !bytes.Equal(collectionsConfigArg, collectionsConfigLedger) {
return policyErr(fmt.Errorf("collection configuration arguments supplied for chaincode %s:%s do not match the configuration in the lscc writeset",
cdRWSet.Name, cdRWSet.Version))
}
channelState, err := vscc.stateFetcher.FetchState()
if err != nil {
return &commonerrors.VSCCExecutionFailureError{Err: fmt.Errorf("failed obtaining query executor: %v", err)}
}
defer channelState.Done()
state := &state{channelState}
// The following condition check added in v1.1 may not be needed as it is not possible to have the chaincodeName~collection key in
// the lscc namespace before a chaincode deploy. To avoid forks in v1.2, the following condition is retained.
if lsccFunc == lscc.DEPLOY {
colCriteria := common.CollectionCriteria{Channel: channelName, Namespace: cdRWSet.Name}
ccp, err := privdata.RetrieveCollectionConfigPackageFromState(colCriteria, state)
if err != nil {
// fail if we get any error other than NoSuchCollectionError
// because it means something went wrong while looking up the
// older collection
if _, ok := err.(privdata.NoSuchCollectionError); !ok {
return &commonerrors.VSCCExecutionFailureError{Err: fmt.Errorf("unable to check whether collection existed earlier for chaincode %s:%s",
cdRWSet.Name, cdRWSet.Version),
}
}
}
if ccp != nil {
return policyErr(fmt.Errorf("collection data should not exist for chaincode %s:%s", cdRWSet.Name, cdRWSet.Version))
}
}
// TODO: Once the new chaincode lifecycle is available (FAB-8724), the following validation
// and other validation performed in ValidateLSCCInvocation can be moved to LSCC itself.
newCollectionConfigPackage := &common.CollectionConfigPackage{}
if collectionsConfigArg != nil {
err := proto.Unmarshal(collectionsConfigArg, newCollectionConfigPackage)
if err != nil {
return policyErr(fmt.Errorf("invalid collection configuration supplied for chaincode %s:%s",
cdRWSet.Name, cdRWSet.Version))
}
} else {
return nil
}
if ac.V1_2Validation() {
newCollectionConfigs := newCollectionConfigPackage.GetConfig()
if err := validateNewCollectionConfigs(newCollectionConfigs); err != nil {
return policyErr(err)
}
if lsccFunc == lscc.UPGRADE {
collectionCriteria := common.CollectionCriteria{Channel: channelName, Namespace: cdRWSet.Name}
// oldCollectionConfigPackage denotes the existing collection config package in the ledger
oldCollectionConfigPackage, err := privdata.RetrieveCollectionConfigPackageFromState(collectionCriteria, state)
if err != nil {
// fail if we get any error other than NoSuchCollectionError
// because it means something went wrong while looking up the
// older collection
if _, ok := err.(privdata.NoSuchCollectionError); !ok {
return &commonerrors.VSCCExecutionFailureError{Err: fmt.Errorf("unable to check whether collection existed earlier for chaincode %s:%s: %v",
cdRWSet.Name, cdRWSet.Version, err),
}
}
}
// oldCollectionConfigPackage denotes the existing collection config package in the ledger
if oldCollectionConfigPackage != nil {
oldCollectionConfigs := oldCollectionConfigPackage.GetConfig()
if err := validateNewCollectionConfigsAgainstOld(newCollectionConfigs, oldCollectionConfigs); err != nil {
return policyErr(err)
}
}
}
}
return nil
}
func (vscc *Validator) ValidateLSCCInvocation(
chid string,
env *common.Envelope,
cap *pb.ChaincodeActionPayload,
payl *common.Payload,
ac channelconfig.ApplicationCapabilities,
) commonerrors.TxValidationError {
cpp, err := utils.GetChaincodeProposalPayload(cap.ChaincodeProposalPayload)
if err != nil {
logger.Errorf("VSCC error: GetChaincodeProposalPayload failed, err %s", err)
return policyErr(err)
}
cis := &pb.ChaincodeInvocationSpec{}
err = proto.Unmarshal(cpp.Input, cis)
if err != nil {
logger.Errorf("VSCC error: Unmarshal ChaincodeInvocationSpec failed, err %s", err)
return policyErr(err)
}
if cis.ChaincodeSpec == nil ||
cis.ChaincodeSpec.Input == nil ||
cis.ChaincodeSpec.Input.Args == nil {
logger.Errorf("VSCC error: committing invalid vscc invocation")
return policyErr(fmt.Errorf("malformed chaincode invocation spec"))
}
lsccFunc := string(cis.ChaincodeSpec.Input.Args[0])
lsccArgs := cis.ChaincodeSpec.Input.Args[1:]
logger.Debugf("VSCC info: ValidateLSCCInvocation acting on %s %#v", lsccFunc, lsccArgs)
switch lsccFunc {
case lscc.UPGRADE, lscc.DEPLOY:
logger.Debugf("VSCC info: validating invocation of lscc function %s on arguments %#v", lsccFunc, lsccArgs)
if len(lsccArgs) < 2 {
return policyErr(fmt.Errorf("Wrong number of arguments for invocation lscc(%s): expected at least 2, received %d", lsccFunc, len(lsccArgs)))
}
if (!ac.PrivateChannelData() && len(lsccArgs) > 5) ||
(ac.PrivateChannelData() && len(lsccArgs) > 6) {
return policyErr(fmt.Errorf("Wrong number of arguments for invocation lscc(%s): received %d", lsccFunc, len(lsccArgs)))
}
cdsArgs, err := utils.GetChaincodeDeploymentSpec(lsccArgs[1], platforms.NewRegistry(
// XXX We should definitely _not_ have this external dependency in VSCC
// as adding a platform could cause non-determinism. This is yet another
// reason why all of this custom LSCC validation at commit time has no
// long term hope of staying deterministic and needs to be removed.
&golang.Platform{},
&node.Platform{},
&java.Platform{},
&car.Platform{},
))
if err != nil {
return policyErr(fmt.Errorf("GetChaincodeDeploymentSpec error %s", err))
}
if cdsArgs == nil || cdsArgs.ChaincodeSpec == nil || cdsArgs.ChaincodeSpec.ChaincodeId == nil ||
cap.Action == nil || cap.Action.ProposalResponsePayload == nil {
return policyErr(fmt.Errorf("VSCC error: invocation of lscc(%s) does not have appropriate arguments", lsccFunc))
}
// get the rwset
pRespPayload, err := utils.GetProposalResponsePayload(cap.Action.ProposalResponsePayload)
if err != nil {
return policyErr(fmt.Errorf("GetProposalResponsePayload error %s", err))
}
if pRespPayload.Extension == nil {
return policyErr(fmt.Errorf("nil pRespPayload.Extension"))
}
respPayload, err := utils.GetChaincodeAction(pRespPayload.Extension)
if err != nil {
return policyErr(fmt.Errorf("GetChaincodeAction error %s", err))
}
txRWSet := &rwsetutil.TxRwSet{}
if err = txRWSet.FromProtoBytes(respPayload.Results); err != nil {
return policyErr(fmt.Errorf("txRWSet.FromProtoBytes error %s", err))
}
// extract the rwset for lscc
var lsccrwset *kvrwset.KVRWSet
for _, ns := range txRWSet.NsRwSets {
logger.Debugf("Namespace %s", ns.NameSpace)
if ns.NameSpace == "lscc" {
lsccrwset = ns.KvRwSet
break
}
}
// retrieve from the ledger the entry for the chaincode at hand
cdLedger, ccExistsOnLedger, err := vscc.getInstantiatedCC(chid, cdsArgs.ChaincodeSpec.ChaincodeId.Name)
if err != nil {
return &commonerrors.VSCCExecutionFailureError{Err: err}
}
/******************************************/
/* security check 0 - validation of rwset */
/******************************************/
// there has to be a write-set
if lsccrwset == nil {
return policyErr(fmt.Errorf("No read write set for lscc was found"))
}
// there must be at least one write
if len(lsccrwset.Writes) < 1 {
return policyErr(fmt.Errorf("LSCC must issue at least one single putState upon deploy/upgrade"))
}
// the first key name must be the chaincode id provided in the deployment spec
if lsccrwset.Writes[0].Key != cdsArgs.ChaincodeSpec.ChaincodeId.Name {
return policyErr(fmt.Errorf("expected key %s, found %s", cdsArgs.ChaincodeSpec.ChaincodeId.Name, lsccrwset.Writes[0].Key))
}
// the value must be a ChaincodeData struct
cdRWSet := &ccprovider.ChaincodeData{}
err = proto.Unmarshal(lsccrwset.Writes[0].Value, cdRWSet)
if err != nil {
return policyErr(fmt.Errorf("unmarhsalling of ChaincodeData failed, error %s", err))
}
// the chaincode name in the lsccwriteset must match the chaincode name in the deployment spec
if cdRWSet.Name != cdsArgs.ChaincodeSpec.ChaincodeId.Name {
return policyErr(fmt.Errorf("expected cc name %s, found %s", cdsArgs.ChaincodeSpec.ChaincodeId.Name, cdRWSet.Name))
}
// the chaincode version in the lsccwriteset must match the chaincode version in the deployment spec
if cdRWSet.Version != cdsArgs.ChaincodeSpec.ChaincodeId.Version {
return policyErr(fmt.Errorf("expected cc version %s, found %s", cdsArgs.ChaincodeSpec.ChaincodeId.Version, cdRWSet.Version))
}
// it must only write to 2 namespaces: LSCC's and the cc that we are deploying/upgrading
for _, ns := range txRWSet.NsRwSets {
if ns.NameSpace != "lscc" && ns.NameSpace != cdRWSet.Name && len(ns.KvRwSet.Writes) > 0 {
return policyErr(fmt.Errorf("LSCC invocation is attempting to write to namespace %s", ns.NameSpace))
}
}
logger.Debugf("Validating %s for cc %s version %s", lsccFunc, cdRWSet.Name, cdRWSet.Version)
switch lsccFunc {
case lscc.DEPLOY:
/******************************************************************/
/* security check 1 - cc not in the LCCC table of instantiated cc */
/******************************************************************/
if ccExistsOnLedger {
return policyErr(fmt.Errorf("Chaincode %s is already instantiated", cdsArgs.ChaincodeSpec.ChaincodeId.Name))
}
/****************************************************************************/
/* security check 2 - validation of rwset (and of collections if enabled) */
/****************************************************************************/
if ac.PrivateChannelData() {
// do extra validation for collections
err := vscc.validateRWSetAndCollection(lsccrwset, cdRWSet, lsccArgs, lsccFunc, ac, chid)
if err != nil {
return err
}
} else {
// there can only be a single ledger write
if len(lsccrwset.Writes) != 1 {
return policyErr(fmt.Errorf("LSCC can only issue a single putState upon deploy"))
}
}
/*****************************************************/
/* security check 3 - check the instantiation policy */
/*****************************************************/
pol := cdRWSet.InstantiationPolicy
if pol == nil {
return policyErr(fmt.Errorf("no instantiation policy was specified"))
}
// FIXME: could we actually pull the cds package from the
// file system to verify whether the policy that is specified
// here is the same as the one on disk?
// PROS: we prevent attacks where the policy is replaced
// CONS: this would be a point of non-determinism
err := vscc.checkInstantiationPolicy(chid, env, pol, payl)
if err != nil {
return err
}
case lscc.UPGRADE:
/**************************************************************/
/* security check 1 - cc in the LCCC table of instantiated cc */
/**************************************************************/
if !ccExistsOnLedger {
return policyErr(fmt.Errorf("Upgrading non-existent chaincode %s", cdsArgs.ChaincodeSpec.ChaincodeId.Name))
}
/**********************************************************/
/* security check 2 - existing cc's version was different */
/**********************************************************/
if cdLedger.Version == cdsArgs.ChaincodeSpec.ChaincodeId.Version {
return policyErr(fmt.Errorf("Existing version of the cc on the ledger (%s) should be different from the upgraded one", cdsArgs.ChaincodeSpec.ChaincodeId.Version))
}
/****************************************************************************/
/* security check 3 validation of rwset (and of collections if enabled) */
/****************************************************************************/
// Only in v1.2, a collection can be updated during a chaincode upgrade
if ac.V1_2Validation() {
// do extra validation for collections
err := vscc.validateRWSetAndCollection(lsccrwset, cdRWSet, lsccArgs, lsccFunc, ac, chid)
if err != nil {
return err
}
} else {
// there can only be a single ledger write
if len(lsccrwset.Writes) != 1 {
return policyErr(fmt.Errorf("LSCC can only issue a single putState upon upgrade"))
}
}
/*****************************************************/
/* security check 4 - check the instantiation policy */
/*****************************************************/
pol := cdLedger.InstantiationPolicy
if pol == nil {
return policyErr(fmt.Errorf("No instantiation policy was specified"))
}
// FIXME: could we actually pull the cds package from the
// file system to verify whether the policy that is specified
// here is the same as the one on disk?
// PROS: we prevent attacks where the policy is replaced
// CONS: this would be a point of non-determinism
err := vscc.checkInstantiationPolicy(chid, env, pol, payl)
if err != nil {
return err
}
/******************************************************************/
/* security check 5 - check the instantiation policy in the rwset */
/******************************************************************/
if ac.V1_1Validation() {
polNew := cdRWSet.InstantiationPolicy
if polNew == nil {
return policyErr(fmt.Errorf("No instantiation policy was specified"))
}
// no point in checking it again if they are the same policy
if !bytes.Equal(polNew, pol) {
err = vscc.checkInstantiationPolicy(chid, env, polNew, payl)
if err != nil {
return err
}
}
}
}
// all is good!
return nil
default:
return policyErr(fmt.Errorf("VSCC error: committing an invocation of function %s of lscc is invalid", lsccFunc))
}
}
func (vscc *Validator) getInstantiatedCC(chid, ccid string) (cd *ccprovider.ChaincodeData, exists bool, err error) {
qe, err := vscc.stateFetcher.FetchState()
if err != nil {
err = fmt.Errorf("could not retrieve QueryExecutor for channel %s, error %s", chid, err)
return
}
defer qe.Done()
channelState := &state{qe}
bytes, err := channelState.GetState("lscc", ccid)
if err != nil {
err = fmt.Errorf("could not retrieve state for chaincode %s on channel %s, error %s", ccid, chid, err)
return
}
if bytes == nil {
return
}
cd = &ccprovider.ChaincodeData{}
err = proto.Unmarshal(bytes, cd)
if err != nil {
err = fmt.Errorf("unmarshalling ChaincodeQueryResponse failed, error %s", err)
return
}
exists = true
return
}
func (vscc *Validator) deduplicateIdentity(cap *pb.ChaincodeActionPayload) ([]*common.SignedData, error) {
// this is the first part of the signed message
prespBytes := cap.Action.ProposalResponsePayload
// build the signature set for the evaluation
signatureSet := []*common.SignedData{}
signatureMap := make(map[string]struct{})
// loop through each of the endorsements and build the signature set
for _, endorsement := range cap.Action.Endorsements {
//unmarshal endorser bytes
serializedIdentity := &msp.SerializedIdentity{}
if err := proto.Unmarshal(endorsement.Endorser, serializedIdentity); err != nil {
logger.Errorf("Unmarshal endorser error: %s", err)
return nil, policyErr(fmt.Errorf("Unmarshal endorser error: %s", err))
}
identity := serializedIdentity.Mspid + string(serializedIdentity.IdBytes)
if _, ok := signatureMap[identity]; ok {
// Endorsement with the same identity has already been added
logger.Warningf("Ignoring duplicated identity, Mspid: %s, pem:\n%s", serializedIdentity.Mspid, serializedIdentity.IdBytes)
continue
}
data := make([]byte, len(prespBytes)+len(endorsement.Endorser))
copy(data, prespBytes)
copy(data[len(prespBytes):], endorsement.Endorser)
signatureSet = append(signatureSet, &common.SignedData{
// set the data that is signed; concatenation of proposal response bytes and endorser ID
Data: data,
// set the identity that signs the message: it's the endorser
Identity: endorsement.Endorser,
// set the signature
Signature: endorsement.Signature})
signatureMap[identity] = struct{}{}
}
logger.Debugf("Signature set is of size %d out of %d endorsement(s)", len(signatureSet), len(cap.Action.Endorsements))
return signatureSet, nil
}
type state struct {
State
}
// GetState retrieves the value for the given key in the given namespace
func (s *state) GetState(namespace string, key string) ([]byte, error) {
values, err := s.GetStateMultipleKeys(namespace, []string{key})
if err != nil {
return nil, err
}
if len(values) == 0 {
return nil, nil
}
return values[0], nil
}
func policyErr(err error) *commonerrors.VSCCEndorsementPolicyError {
return &commonerrors.VSCCEndorsementPolicyError{
Err: err,
}
}