// vivify verifies that all the chunks for the file described by fileblob are on the blobserver.
// It makes a planned permanode, signs it, and uploads it. It finally makes a camliContent claim
// on that permanode for fileblob, signs it, and uploads it to the blobserver.
func vivify(blobReceiver blobserver.BlobReceiveConfiger, fileblob blob.SizedRef) error {
sf, ok := blobReceiver.(blob.StreamingFetcher)
if !ok {
return fmt.Errorf("BlobReceiver is not a StreamingFetcher")
}
fetcher := blob.SeekerFromStreamingFetcher(sf)
fr, err := schema.NewFileReader(fetcher, fileblob.Ref)
if err != nil {
return fmt.Errorf("Filereader error for blobref %v: %v", fileblob.Ref.String(), err)
}
defer fr.Close()
h := sha1.New()
n, err := io.Copy(h, fr)
if err != nil {
return fmt.Errorf("Could not read all file of blobref %v: %v", fileblob.Ref.String(), err)
}
if n != fr.Size() {
return fmt.Errorf("Could not read all file of blobref %v. Wanted %v, got %v", fileblob.Ref.String(), fr.Size(), n)
}
config := blobReceiver.Config()
if config == nil {
return errors.New("blobReceiver has no config")
}
hf := config.HandlerFinder
if hf == nil {
return errors.New("blobReceiver config has no HandlerFinder")
}
JSONSignRoot, sh, err := hf.FindHandlerByType("jsonsign")
if err != nil || sh == nil {
return errors.New("jsonsign handler not found")
}
sigHelper, ok := sh.(*signhandler.Handler)
if !ok {
return errors.New("handler is not a JSON signhandler")
}
discoMap := sigHelper.DiscoveryMap(JSONSignRoot)
publicKeyBlobRef, ok := discoMap["publicKeyBlobRef"].(string)
if !ok {
return fmt.Errorf("Discovery: json decoding error: %v", err)
}
// The file schema must have a modtime to vivify, as the modtime is used for all three of:
// 1) the permanode's signature
// 2) the camliContent attribute claim's "claimDate"
// 3) the signature time of 2)
claimDate, err := time.Parse(time.RFC3339, fr.FileSchema().UnixMtime)
if err != nil {
return fmt.Errorf("While parsing modtime for file %v: %v", fr.FileSchema().FileName, err)
}
permanodeBB := schema.NewHashPlannedPermanode(h)
permanodeBB.SetSigner(blob.MustParse(publicKeyBlobRef))
permanodeBB.SetClaimDate(claimDate)
permanodeSigned, err := sigHelper.Sign(permanodeBB)
if err != nil {
return fmt.Errorf("Signing permanode %v: %v", permanodeSigned, err)
}
permanodeRef := blob.SHA1FromString(permanodeSigned)
_, err = blobserver.ReceiveNoHash(blobReceiver, permanodeRef, strings.NewReader(permanodeSigned))
if err != nil {
return fmt.Errorf("While uploading signed permanode %v, %v: %v", permanodeRef, permanodeSigned, err)
}
contentClaimBB := schema.NewSetAttributeClaim(permanodeRef, "camliContent", fileblob.Ref.String())
contentClaimBB.SetSigner(blob.MustParse(publicKeyBlobRef))
contentClaimBB.SetClaimDate(claimDate)
contentClaimSigned, err := sigHelper.Sign(contentClaimBB)
if err != nil {
return fmt.Errorf("Signing camliContent claim: %v", err)
}
contentClaimRef := blob.SHA1FromString(contentClaimSigned)
_, err = blobserver.ReceiveNoHash(blobReceiver, contentClaimRef, strings.NewReader(contentClaimSigned))
if err != nil {
return fmt.Errorf("While uploading signed camliContent claim %v, %v: %v", contentClaimRef, contentClaimSigned, err)
}
return nil
}
// vivify verifies that all the chunks for the file described by fileblob are on the blobserver.
// It makes a planned permanode, signs it, and uploads it. It finally makes a camliContent claim
// on that permanode for fileblob, signs it, and uploads it to the blobserver.
func vivify(blobReceiver blobserver.BlobReceiveConfiger, fileblob blobref.SizedBlobRef) error {
sf, ok := blobReceiver.(blobref.StreamingFetcher)
if !ok {
return fmt.Errorf("BlobReceiver is not a StreamingFetcher")
}
fetcher := blobref.SeekerFromStreamingFetcher(sf)
fr, err := schema.NewFileReader(fetcher, fileblob.BlobRef)
if err != nil {
return fmt.Errorf("Filereader error for blobref %v: %v", fileblob.BlobRef.String(), err)
}
defer fr.Close()
h := sha1.New()
n, err := io.Copy(h, fr)
if err != nil {
return fmt.Errorf("Could not read all file of blobref %v: %v", fileblob.BlobRef.String(), err)
}
if n != fr.Size() {
return fmt.Errorf("Could not read all file of blobref %v. Wanted %v, got %v", fileblob.BlobRef.String(), fr.Size(), n)
}
config := blobReceiver.Config()
if config == nil {
return errors.New("blobReceiver has no config")
}
hf := config.HandlerFinder
if hf == nil {
return errors.New("blobReceiver config has no HandlerFinder")
}
JSONSignRoot, sh, err := hf.FindHandlerByType("jsonsign")
// TODO(mpl): second check should not be necessary, and yet it happens. Figure it out.
if err != nil || sh == nil {
return errors.New("jsonsign handler not found")
}
sigHelper, ok := sh.(*signhandler.Handler)
if !ok {
return errors.New("handler is not a JSON signhandler")
}
discoMap := sigHelper.DiscoveryMap(JSONSignRoot)
publicKeyBlobRef, ok := discoMap["publicKeyBlobRef"].(string)
if !ok {
return fmt.Errorf("Discovery: json decoding error: %v", err)
}
unsigned := schema.NewHashPlannedPermanode(h)
unsigned["camliSigner"] = publicKeyBlobRef
signed, err := sigHelper.SignMap(unsigned)
if err != nil {
return fmt.Errorf("Signing permanode %v: %v", signed, err)
}
signedPerm := blobref.SHA1FromString(signed)
_, err = blobReceiver.ReceiveBlob(signedPerm, strings.NewReader(signed))
if err != nil {
return fmt.Errorf("While uploading signed permanode %v: %v", signed, err)
}
contentAttr := schema.NewSetAttributeClaim(signedPerm, "camliContent", fileblob.BlobRef.String())
claimDate, err := time.Parse(time.RFC3339, fr.FileSchema().UnixMtime)
contentAttr.SetClaimDate(claimDate)
contentAttr["camliSigner"] = publicKeyBlobRef
signed, err = sigHelper.SignMap(contentAttr)
if err != nil {
return fmt.Errorf("Signing camliContent claim: %v", err)
}
signedClaim := blobref.SHA1FromString(signed)
_, err = blobReceiver.ReceiveBlob(signedClaim, strings.NewReader(signed))
if err != nil {
return fmt.Errorf("While uploading signed camliContent claim %v: %v", signed, err)
}
return nil
}