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Verify chunk id for snapshot chunks

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This commit is contained in:
Gilbert Chen
2017-07-07 12:08:38 -04:00
parent 2908b807b9
commit 09f695b3e1
3 changed files with 20 additions and 1 deletions
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12
src/duplicacy_chunk.go
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@@ -154,6 +154,18 @@ func (chunk *Chunk) GetID() string {
return chunk.id
}
func (chunk *Chunk) VerifyID() {
hasher := chunk.config.NewKeyedHasher(chunk.config.HashKey)
hasher.Write(chunk.buffer.Bytes())
hash := hasher.Sum(nil)
hasher = chunk.config.NewKeyedHasher(chunk.config.IDKey)
hasher.Write([]byte(hash))
chunkID := hex.EncodeToString(hasher.Sum(nil))
if chunkID != chunk.GetID() {
LOG_ERROR("CHUNK_ID", "The chunk id should be %s instead of %s, length: %d", chunkID, chunk.GetID(), len(chunk.buffer.Bytes()))
}
}
// Encrypt encrypts the plain data stored in the chunk buffer. If derivationKey is not nil, the actual
// encryption key will be HMAC-SHA256(encryptionKey, derivationKey).
func (chunk *Chunk) Encrypt(encryptionKey []byte, derivationKey string) (err error) {

5
src/duplicacy_chunkuploader.go
View File

@@ -92,6 +92,11 @@ func (uploader *ChunkUploader) Upload(threadIndex int, task ChunkUploadTask) boo
chunkSize := chunk.GetLength()
chunkID := chunk.GetID()
// For a snapshot chunk, verify that its chunk id is correct
if uploader.snapshotCache != nil {
chunk.VerifyID()
}
if uploader.snapshotCache != nil && uploader.storage.IsCacheNeeded() {
// Save a copy to the local snapshot.
chunkPath, exist, _, err := uploader.snapshotCache.FindChunk(threadIndex, chunkID, false)