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authorJakob Unterwurzacher2017-05-28 20:43:48 +0200
committerJakob Unterwurzacher2017-05-30 17:04:46 +0200
commit9a217ce786581ee7ec18b27e46f0096763c85f9e (patch)
tree973b358e56e0df5a7749f8d714748b0c0710aaca /internal/fusefrontend_reverse/rfile.go
parente43eb36da3e72cd0f59ac978cf76a94fa87ca7cd (diff)
pathiv: move block IV algorithm into this package
This was implemented in fusefrontend_reverse, but we need it in fusefrontend as well. Move the algorithm into pathiv.BlockIV().
Diffstat (limited to 'internal/fusefrontend_reverse/rfile.go')
-rw-r--r--internal/fusefrontend_reverse/rfile.go10
1 files changed, 2 insertions, 8 deletions
diff --git a/internal/fusefrontend_reverse/rfile.go b/internal/fusefrontend_reverse/rfile.go
index 530547a..742d697 100644
--- a/internal/fusefrontend_reverse/rfile.go
+++ b/internal/fusefrontend_reverse/rfile.go
@@ -2,7 +2,6 @@ package fusefrontend_reverse
import (
"bytes"
- "encoding/binary"
"io"
"os"
"syscall"
@@ -95,18 +94,13 @@ func (rf *reverseFile) GetAttr(*fuse.Attr) fuse.Status {
// encryptBlocks - encrypt "plaintext" into a number of ciphertext blocks.
// "plaintext" must already be block-aligned.
func (rf *reverseFile) encryptBlocks(plaintext []byte, firstBlockNo uint64, fileID []byte, block0IV []byte) []byte {
- nonce := make([]byte, len(block0IV))
- copy(nonce, block0IV)
- block0IVlow := binary.BigEndian.Uint64(block0IV[8:])
- nonceLow := nonce[8:]
-
inBuf := bytes.NewBuffer(plaintext)
var outBuf bytes.Buffer
bs := int(rf.contentEnc.PlainBS())
for blockNo := firstBlockNo; inBuf.Len() > 0; blockNo++ {
- binary.BigEndian.PutUint64(nonceLow, block0IVlow+blockNo)
inBlock := inBuf.Next(bs)
- outBlock := rf.contentEnc.EncryptBlockNonce(inBlock, blockNo, fileID, nonce)
+ iv := pathiv.BlockIV(block0IV, blockNo)
+ outBlock := rf.contentEnc.EncryptBlockNonce(inBlock, blockNo, fileID, iv)
outBuf.Write(outBlock)
}
return outBuf.Bytes()