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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)
}
}
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