cerc-io/lotus
16
0
Fork 0
Code Issues Pull Requests Packages Projects Releases 27 Wiki Activity

Merge pull request #7710 from filecoin-project/feat/pc2-validation

Browse Source 
ffiwrapper: Validate PC2 by calling C1 with random seeds
This commit is contained in:
Łukasz Magiera 2021-11-30 02:05:32 +01:00 committed by GitHub
commit 19e808fffb
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 58 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
extern/sector-storage/ffiwrapper/sealer_cgo.go vendored
View File

@ -7,6 +7,9 @@ import (
"bufio"
"bytes"
"context"
"crypto/rand"
"encoding/base64"
"encoding/json"
"io"
"math/bits"
"os"
@ -530,9 +533,19 @@ func (sb *Sealer) SealPreCommit1(ctx context.Context, sector storage.SectorRef,
if err != nil {
return nil, xerrors.Errorf("presealing sector %d (%s): %w", sector.ID.Number, paths.Unsealed, err)
}
return p1o, nil
p1odec := map[string]interface{}{}
if err := json.Unmarshal(p1o, &p1odec); err != nil {
return nil, xerrors.Errorf("unmarshaling pc1 output: %w", err)
}
p1odec["_lotus_SealRandomness"] = ticket
return json.Marshal(&p1odec)
}
var PC2CheckRounds = 3
func (sb *Sealer) SealPreCommit2(ctx context.Context, sector storage.SectorRef, phase1Out storage.PreCommit1Out) (storage.SectorCids, error) {
paths, done, err := sb.sectors.AcquireSector(ctx, sector, storiface.FTSealed|storiface.FTCache, 0, storiface.PathSealing)
if err != nil {
@ -545,6 +558,50 @@ func (sb *Sealer) SealPreCommit2(ctx context.Context, sector storage.SectorRef,
return storage.SectorCids{}, xerrors.Errorf("presealing sector %d (%s): %w", sector.ID.Number, paths.Unsealed, err)
}
ssize, err := sector.ProofType.SectorSize()
if err != nil {
return storage.SectorCids{}, xerrors.Errorf("get ssize: %w", err)
}
p1odec := map[string]interface{}{}
if err := json.Unmarshal(phase1Out, &p1odec); err != nil {
return storage.SectorCids{}, xerrors.Errorf("unmarshaling pc1 output: %w", err)
}
var ticket abi.SealRandomness
ti, found := p1odec["_lotus_SealRandomness"]
if found {
ticket, err = base64.StdEncoding.DecodeString(ti.(string))
if err != nil {
return storage.SectorCids{}, xerrors.Errorf("decoding ticket: %w", err)
}
for i := 0; i < PC2CheckRounds; i++ {
var sd [32]byte
_, _ = rand.Read(sd[:])
_, err := ffi.SealCommitPhase1(
sector.ProofType,
sealedCID,
unsealedCID,
paths.Cache,
paths.Sealed,
sector.ID.Number,
sector.ID.Miner,
ticket,
sd[:],
[]abi.PieceInfo{{Size: abi.PaddedPieceSize(ssize), PieceCID: unsealedCID}},
)
if err != nil {
log.Warn("checking PreCommit failed: ", err)
log.Warnf("num:%d tkt:%v seed:%v sealedCID:%v, unsealedCID:%v", sector.ID.Number, ticket, sd[:], sealedCID, unsealedCID)
return storage.SectorCids{}, xerrors.Errorf("checking PreCommit failed: %w", err)
}
}
}
return storage.SectorCids{
Unsealed: unsealedCID,
Sealed: sealedCID,