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-rw-r--r--tests/cli/xchacha_test.go66
1 files changed, 66 insertions, 0 deletions
diff --git a/tests/cli/xchacha_test.go b/tests/cli/xchacha_test.go
new file mode 100644
index 0000000..7f24c8b
--- /dev/null
+++ b/tests/cli/xchacha_test.go
@@ -0,0 +1,66 @@
+package cli
+
+import (
+ "fmt"
+ "io/ioutil"
+ "os"
+ "syscall"
+ "testing"
+
+ "github.com/rfjakob/gocryptfs/v2/internal/configfile"
+
+ "github.com/rfjakob/gocryptfs/v2/tests/test_helpers"
+)
+
+// Create "-xchacha" fs
+func TestInitXchacha(t *testing.T) {
+ cDir := test_helpers.InitFS(nil, "-xchacha")
+ // Check config file sanity
+ _, c, err := configfile.LoadAndDecrypt(cDir+"/"+configfile.ConfDefaultName, testPw)
+ if err != nil {
+ fmt.Println(err)
+ os.Exit(1)
+ }
+ if c.IsFeatureFlagSet(configfile.FlagGCMIV128) {
+ t.Error("GCMIV128 flag should be off")
+ }
+ if !c.IsFeatureFlagSet(configfile.FlagXChaCha20Poly1305) {
+ t.Error("XChaCha20Poly1305 flag should be on")
+ }
+ if !c.IsFeatureFlagSet(configfile.FlagHKDF) {
+ t.Error("HKDF flag should be on")
+ }
+}
+
+// Create and mount "-xchacha" fs, and see if we get the expected file sizes
+// (xchacha has longer IVs).
+func TestXchacha(t *testing.T) {
+ cDir := test_helpers.InitFS(nil, "-xchacha", "-plaintextnames")
+ pDir := cDir + ".mnt"
+ test_helpers.MountOrExit(cDir, pDir, "-extpass", "echo test")
+ defer test_helpers.UnmountPanic(pDir)
+
+ if err := ioutil.WriteFile(pDir+"/1byte", []byte("x"), 0700); err != nil {
+ t.Fatal(err)
+ }
+ var st syscall.Stat_t
+ if err := syscall.Stat(cDir+"/1byte", &st); err != nil {
+ t.Fatal(err)
+ }
+ // 2 byte version header + 16 byte file id + 192 bit xchacha iv + 1 byte payload + 16 byte mac
+ if st.Size != 2+16+24+1+16 {
+ t.Errorf("wrong size %d", st.Size)
+ }
+
+ // 1 MiB = 256 4kiB blocks
+ if err := ioutil.WriteFile(pDir+"/1MiB", make([]byte, 1024*1024), 0700); err != nil {
+ t.Fatal(err)
+ }
+ if err := syscall.Stat(cDir+"/1MiB", &st); err != nil {
+ t.Fatal(err)
+ }
+ // 2 byte version header + (16 byte file id + 192 bit xchacha iv + 4096 byte payload + 16 byte mac)*256
+ if st.Size != 2+16+(24+4096+16)*256 {
+ t.Errorf("wrong size %d", st.Size)
+ }
+}