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libgocryptfs
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Add BlockNoPlainOff() and BlockNoCipherOff() + test 

Also, fix key, it is now []byte, not [16]byte
This commit is contained in:
Jakob Unterwurzacher 2015-10-04 11:03:40 +02:00
parent fa88741770
commit 5229b8f5f5
3 changed files with 38 additions and 4 deletions
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26
cryptfs/content_test.go
View File

@ -19,7 +19,7 @@ func TestSplitRange(t *testing.T) {
testRange{65444, 54},
testRange{6654, 8945})
var key [16]byte
key := make([]byte, 16)
f := NewCryptFS(key, true)
for _, r := range(ranges) {
@ -42,7 +42,7 @@ func TestCiphertextRange(t *testing.T) {
testRange{65444, 54},
testRange{6654, 8945})
var key [16]byte
key := make([]byte, 16)
f := NewCryptFS(key, true)
for _, r := range(ranges) {
@ -58,3 +58,25 @@ func TestCiphertextRange(t *testing.T) {
}
}
}
func TestBlockNo(t *testing.T) {
key := make([]byte, 16)
f := NewCryptFS(key, true)
b := f.BlockNoCipherOff(788)
if b != 0 {
t.Errorf("actual: %d", b)
}
b = f.BlockNoCipherOff(f.CipherBS())
if b != 1 {
t.Errorf("actual: %d", b)
}
b = f.BlockNoPlainOff(788)
if b != 0 {
t.Errorf("actual: %d", b)
}
b = f.BlockNoPlainOff(f.PlainBS())
if b != 1 {
t.Errorf("actual: %d", b)
}
}

10
cryptfs/cryptfs_content.go
View File

@ -219,3 +219,13 @@ func (be *CryptFS) MergeBlocks(oldData []byte, newData []byte, offset int) []byt
}
return out[0:outLen]
}
// Get the block number at plain-text offset
func (be *CryptFS) BlockNoPlainOff(plainOffset uint64) uint64 {
return plainOffset / be.plainBS
}
// Get the block number at ciphter-text offset
func (be *CryptFS) BlockNoCipherOff(cipherOffset uint64) uint64 {
return cipherOffset / be.cipherBS
}

6
cryptfs/names_test.go
View File

@ -11,7 +11,7 @@ func TestTranslatePath(t *testing.T) {
s = append(s, "foo12312312312312312313123123123")
s = append(s, "123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890")
var key [16]byte
key := make([]byte, 16)
fs := NewCryptFS(key, true)
for _, n := range(s) {
@ -32,8 +32,10 @@ func TestPad16(t *testing.T) {
s = append(s, []byte("foo"))
s = append(s, []byte("12345678901234567"))
s = append(s, []byte("12345678901234567abcdefg"))
var key [16]byte
key := make([]byte, 16)
fs := NewCryptFS(key, true)
for i := range(s) {
orig := s[i]
padded := fs.pad16(orig)