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Diffstat (limited to 'internal/contentenc/content_test.go')
-rw-r--r--internal/contentenc/content_test.go91
1 files changed, 91 insertions, 0 deletions
diff --git a/internal/contentenc/content_test.go b/internal/contentenc/content_test.go
new file mode 100644
index 0000000..70ad58d
--- /dev/null
+++ b/internal/contentenc/content_test.go
@@ -0,0 +1,91 @@
+package contentenc
+
+import (
+ "testing"
+)
+
+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, KEY_LEN)
+ f := NewCryptFS(key, true, false, true)
+
+ 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 > DEFAULT_PLAINBS || p.Skip >= DEFAULT_PLAINBS {
+ 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, KEY_LEN)
+ f := NewCryptFS(key, true, false, true)
+
+ 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, KEY_LEN)
+ f := NewCryptFS(key, true, false, true)
+
+ 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)
+ }
+}