libgocryptfs/internal/contentenc/content_test.go
Jakob Unterwurzacher abd61d968d contentenc: rename constant "IVBitLen" to "DefaultIVBits" and clarify comment
128-bit IVs are NOT used everywhere.
2016-09-25 18:40:29 +02:00

97 lines
2.2 KiB
Go

package contentenc
import (
"testing"
"github.com/rfjakob/gocryptfs/internal/cryptocore"
)
type testRange struct {
offset uint64
length uint64
}
func TestSplitRange(t *testing.T) {
var ranges []testRange
ranges = append(ranges, testRange{0, 70000},
testRange{0, 10},
testRange{234, 6511},
testRange{65444, 54},
testRange{0, 1024 * 1024},
testRange{0, 65536},
testRange{6654, 8945})
key := make([]byte, cryptocore.KeyLen)
cc := cryptocore.New(key, cryptocore.BackendOpenSSL, DefaultIVBits)
f := New(cc, DefaultBS)
for _, r := range ranges {
parts := f.ExplodePlainRange(r.offset, r.length)
var lastBlockNo uint64 = 1 << 63
for _, p := range parts {
if p.BlockNo == lastBlockNo {
t.Errorf("Duplicate block number %d", p.BlockNo)
}
lastBlockNo = p.BlockNo
if p.Length > DefaultBS || p.Skip >= DefaultBS {
t.Errorf("Test fail: n=%d, length=%d, offset=%d\n", p.BlockNo, p.Length, p.Skip)
}
}
}
}
func TestCiphertextRange(t *testing.T) {
var ranges []testRange
ranges = append(ranges, testRange{0, 70000},
testRange{0, 10},
testRange{234, 6511},
testRange{65444, 54},
testRange{6654, 8945})
key := make([]byte, cryptocore.KeyLen)
cc := cryptocore.New(key, cryptocore.BackendOpenSSL, DefaultIVBits)
f := New(cc, DefaultBS)
for _, r := range ranges {
blocks := f.ExplodePlainRange(r.offset, r.length)
alignedOffset, alignedLength := blocks[0].JointCiphertextRange(blocks)
skipBytes := blocks[0].Skip
if alignedLength < r.length {
t.Errorf("alignedLength=%d is smaller than length=%d", alignedLength, r.length)
}
if (alignedOffset-HEADER_LEN)%f.cipherBS != 0 {
t.Errorf("alignedOffset=%d is not aligned", alignedOffset)
}
if r.offset%f.plainBS != 0 && skipBytes == 0 {
t.Errorf("skipBytes=0")
}
}
}
func TestBlockNo(t *testing.T) {
key := make([]byte, cryptocore.KeyLen)
cc := cryptocore.New(key, cryptocore.BackendOpenSSL, DefaultIVBits)
f := New(cc, DefaultBS)
b := f.CipherOffToBlockNo(788)
if b != 0 {
t.Errorf("actual: %d", b)
}
b = f.CipherOffToBlockNo(HEADER_LEN + f.cipherBS)
if b != 1 {
t.Errorf("actual: %d", b)
}
b = f.PlainOffToBlockNo(788)
if b != 0 {
t.Errorf("actual: %d", b)
}
b = f.PlainOffToBlockNo(f.plainBS)
if b != 1 {
t.Errorf("actual: %d", b)
}
}