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update.go
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update.go
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package types
import (
"bytes"
"time"
"github.com/cosmos/cosmos-sdk/codec"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
clienttypes "github.com/cosmos/ibc-go/v4/modules/core/02-client/types"
"github.com/cosmos/ibc-go/v4/modules/core/exported"
"github.com/datachainlab/lcp/go/sgx/ias"
mapset "github.com/deckarep/golang-set/v2"
"github.com/ethereum/go-ethereum/common"
)
// Update and Misbehaviour functions
func (cs ClientState) CheckHeaderAndUpdateState(ctx sdk.Context, cdc codec.BinaryCodec, store sdk.KVStore, header exported.Header) (exported.ClientState, exported.ConsensusState, error) {
switch header := header.(type) {
case *UpdateClientHeader:
return cs.CheckHeaderAndUpdateForUpdateClient(ctx, cdc, store, header)
case *RegisterEnclaveKeyHeader:
return cs.CheckHeaderAndUpdateForRegisterEnclaveKey(ctx, cdc, store, header)
default:
return nil, nil, sdkerrors.Wrapf(clienttypes.ErrInvalidHeader, "unknown header %T", header)
}
}
func (cs ClientState) CheckHeaderAndUpdateForUpdateClient(ctx sdk.Context, cdc codec.BinaryCodec, store sdk.KVStore, header *UpdateClientHeader) (exported.ClientState, exported.ConsensusState, error) {
commitment, err := header.GetCommitment()
if err != nil {
return nil, nil, err
}
if cs.LatestHeight.IsZero() {
if len(commitment.NewState) == 0 {
return nil, nil, sdkerrors.Wrapf(clienttypes.ErrInvalidHeader, "invalid header %v: the commitment's `NewState` must be non-nil", header)
}
} else {
if commitment.PrevHeight == nil || commitment.PrevStateID == nil {
return nil, nil, sdkerrors.Wrapf(clienttypes.ErrInvalidHeader, "invalid header %v: the commitment's `PrevHeight` and `PrevStateID` must be non-nil", header)
}
prevConsensusState, err := GetConsensusState(store, cdc, commitment.PrevHeight)
if err != nil {
return nil, nil, err
}
if !bytes.Equal(prevConsensusState.StateId, commitment.PrevStateID[:]) {
return nil, nil, sdkerrors.Wrapf(clienttypes.ErrInvalidHeader, "unexpected StateID: expected=%v actual=%v", prevConsensusState.StateId, commitment.PrevStateID[:])
}
}
signer := common.BytesToAddress(header.Signer)
if !cs.IsActiveKey(ctx.BlockTime(), signer) {
return nil, nil, sdkerrors.Wrapf(clienttypes.ErrInvalidHeader, "signer '%v' not found", signer)
}
if err := VerifySignatureWithSignBytes(header.Commitment, header.Signature, signer); err != nil {
return nil, nil, sdkerrors.Wrapf(clienttypes.ErrInvalidHeader, err.Error())
}
if h := header.GetHeight().(clienttypes.Height); cs.LatestHeight.LT(h) {
cs.LatestHeight = h
}
return &cs, &ConsensusState{StateId: commitment.NewStateID[:], Timestamp: commitment.Timestamp.Uint64()}, nil
}
func (cs ClientState) CheckHeaderAndUpdateForRegisterEnclaveKey(ctx sdk.Context, cdc codec.BinaryCodec, store sdk.KVStore, header *RegisterEnclaveKeyHeader) (exported.ClientState, exported.ConsensusState, error) {
// TODO define error types
if err := ias.VerifyReport(header.Report, header.Signature, header.SigningCert, ctx.BlockTime()); err != nil {
return nil, nil, sdkerrors.Wrapf(clienttypes.ErrInvalidHeader, "invalid header: header=%v, err=%v", header, err)
}
avr, err := ias.ParseAndValidateAVR(header.Report)
if err != nil {
return nil, nil, sdkerrors.Wrapf(clienttypes.ErrInvalidHeader, "invalid AVR: report=%v err=%v", header.Report, err)
}
quoteStatus := avr.ISVEnclaveQuoteStatus.String()
if quoteStatus == QuoteOK {
if len(avr.AdvisoryIDs) != 0 {
return nil, nil, sdkerrors.Wrapf(clienttypes.ErrInvalidHeader, "advisory IDs should be empty when status is OK: actual=%v", avr.AdvisoryIDs)
}
} else {
if !cs.isAllowedStatus(quoteStatus) {
return nil, nil, sdkerrors.Wrapf(clienttypes.ErrInvalidHeader, "disallowed quote status exists: allowed=%v actual=%v", cs.AllowedQuoteStatuses, quoteStatus)
}
if !cs.isAllowedAdvisoryIDs(avr.AdvisoryIDs) {
return nil, nil, sdkerrors.Wrapf(clienttypes.ErrInvalidHeader, "disallowed advisory ID(s) exists: allowed=%v actual=%v", cs.AllowedAdvisoryIds, avr.AdvisoryIDs)
}
}
quote, err := avr.Quote()
if err != nil {
return nil, nil, err
}
if !bytes.Equal(cs.Mrenclave, quote.Report.MRENCLAVE[:]) {
return nil, nil, sdkerrors.Wrapf(clienttypes.ErrInvalidHeader, "invalid AVR: mrenclave mismatch: expected=%v actual=%v", cs.Mrenclave, quote.Report.MRENCLAVE[:])
}
addr, err := ias.GetEnclaveKeyAddress(quote)
if err != nil {
return nil, nil, err
}
if cs.Contains(addr[:]) {
return nil, nil, sdkerrors.Wrapf(clienttypes.ErrInvalidHeader, "signer '%v' already exists", addr.String())
}
newClientState := cs.WithNewKey(addr, avr.GetTimestamp())
return &newClientState, &ConsensusState{}, nil
}
func (cs ClientState) Contains(signer []byte) bool {
for _, key := range cs.Keys {
if bytes.Equal(signer, key) {
return true
}
}
return false
}
func (cs ClientState) IsActiveKey(currentTime time.Time, signer common.Address) bool {
expiredTime := uint64(currentTime.Add(-cs.getKeyExpiration()).Unix())
for i, key := range cs.Keys {
if bytes.Equal(signer[:], key) {
// TODO remove key if it's expired
return cs.AttestationTimes[i] > expiredTime
}
}
return false
}
func (cs ClientState) WithNewKey(signer common.Address, attestationTime time.Time) ClientState {
cs.Keys = append(cs.Keys, signer[:])
cs.AttestationTimes = append(cs.AttestationTimes, uint64(attestationTime.Unix()))
return cs
}
func (cs ClientState) getKeyExpiration() time.Duration {
return time.Duration(cs.KeyExpiration) * time.Second
}
func (cs ClientState) isAllowedStatus(status string) bool {
if status == QuoteOK {
return true
}
for _, s := range cs.AllowedQuoteStatuses {
if status == s {
return true
}
}
return false
}
func (cs ClientState) isAllowedAdvisoryIDs(advIDs []string) bool {
if len(advIDs) == 0 {
return true
}
set := mapset.NewThreadUnsafeSet(cs.AllowedAdvisoryIds...)
return set.Contains(advIDs...)
}