665 lines
17 KiB
Go
665 lines
17 KiB
Go
package matrix
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// File reading, writing, modification, truncate
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//
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// Runs everything four times, for all combinations of
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// "-plaintextnames" and "-openssl".
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//
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// Test Matrix:
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// openssl=true openssl=false
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// plaintextnames=false X X
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// plaintextnames=true X X
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import (
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"bytes"
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"flag"
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"runtime"
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"sync"
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"syscall"
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"testing"
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"github.com/rfjakob/gocryptfs/internal/syscallcompat"
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"github.com/rfjakob/gocryptfs/tests/test_helpers"
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)
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// Several tests need to be aware if plaintextnames is active or not, so make this
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// a global variable
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var plaintextnames bool
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// This is the entry point for the tests
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func TestMain(m *testing.M) {
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// Make "testing.Verbose()" return the correct value
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flag.Parse()
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for _, openssl := range []bool{true, false} {
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for _, plaintextnames = range []bool{true, false} {
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if testing.Verbose() {
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fmt.Printf("matrix: testing openssl=%v plaintextnames=%v\n", openssl, plaintextnames)
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}
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test_helpers.ResetTmpDir(plaintextnames)
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opts := []string{"--zerokey"}
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opts = append(opts, fmt.Sprintf("-openssl=%v", openssl))
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opts = append(opts, fmt.Sprintf("-plaintextnames=%v", plaintextnames))
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test_helpers.MountOrExit(test_helpers.DefaultCipherDir, test_helpers.DefaultPlainDir, opts...)
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r := m.Run()
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test_helpers.UnmountPanic(test_helpers.DefaultPlainDir)
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if r != 0 {
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os.Exit(r)
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}
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}
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}
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os.Exit(0)
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}
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// Write "n" zero bytes to filename "fn", read again, compare hash
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func testWriteN(t *testing.T, fn string, n int) string {
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file, err := os.Create(test_helpers.DefaultPlainDir + "/" + fn)
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if err != nil {
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t.Fatal(err)
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}
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d := make([]byte, n)
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written, err := file.Write(d)
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if err != nil || written != len(d) {
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t.Errorf("err=\"%s\", written=%d", err, written)
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}
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err = file.Close()
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if err != nil {
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t.Error(err)
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}
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test_helpers.VerifySize(t, test_helpers.DefaultPlainDir+"/"+fn, n)
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hashWant := test_helpers.Md5hex(d)
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hashActual := test_helpers.Md5fn(test_helpers.DefaultPlainDir + "/" + fn)
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if hashActual != hashWant {
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t.Errorf("Wrong content, hashWant=%s hashActual=%s", hashWant, hashActual)
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}
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return hashActual
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}
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func TestWrite10(t *testing.T) {
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testWriteN(t, "10", 10)
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}
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func TestWrite100(t *testing.T) {
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testWriteN(t, "100", 100)
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}
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func TestWrite1M(t *testing.T) {
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testWriteN(t, "1M", 1024*1024)
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}
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func TestWrite100x100(t *testing.T) {
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hashWant := testWriteN(t, "100x100", 100)
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// Read and check 100 times to catch race conditions
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var i int
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for i = 0; i < 100; i++ {
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hashActual := test_helpers.Md5fn(test_helpers.DefaultPlainDir + "/100")
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if hashActual != hashWant {
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fmt.Printf("Read corruption in loop #%d\n", i)
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t.FailNow()
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} else {
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//fmt.Print(".")
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}
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}
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}
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// Hint for calculating reference md5sums:
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// dd if=/dev/zero count=1 bs=XYZ | md5sum
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func TestTruncate(t *testing.T) {
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fn := test_helpers.DefaultPlainDir + "/truncate"
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file, err := os.Create(fn)
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if err != nil {
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t.FailNow()
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}
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// Grow to two blocks
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file.Truncate(7000)
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test_helpers.VerifySize(t, fn, 7000)
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if md5 := test_helpers.Md5fn(fn); md5 != "95d4ec7038e3e4fdbd5f15c34c3f0b34" {
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t.Errorf("Wrong md5 %s", md5)
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}
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// Shrink - needs RMW
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file.Truncate(6999)
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test_helpers.VerifySize(t, fn, 6999)
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if md5 := test_helpers.Md5fn(fn); md5 != "35fd15873ec6c35380064a41b9b9683b" {
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t.Errorf("Wrong md5 %s", md5)
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}
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// Shrink to one partial block
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file.Truncate(465)
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test_helpers.VerifySize(t, fn, 465)
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if md5 := test_helpers.Md5fn(fn); md5 != "a1534d6e98a6b21386456a8f66c55260" {
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t.Errorf("Wrong md5 %s", md5)
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}
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// Grow to exactly one block
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file.Truncate(4096)
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test_helpers.VerifySize(t, fn, 4096)
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if md5 := test_helpers.Md5fn(fn); md5 != "620f0b67a91f7f74151bc5be745b7110" {
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t.Errorf("Wrong md5 %s", md5)
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}
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// Truncate to zero
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file.Truncate(0)
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test_helpers.VerifySize(t, fn, 0)
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// Grow to 10MB (creates file holes)
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var sz int
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sz = 10 * 1024 * 1024
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file.Truncate(int64(sz))
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test_helpers.VerifySize(t, fn, sz)
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if md5 := test_helpers.Md5fn(fn); md5 != "f1c9645dbc14efddc7d8a322685f26eb" {
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t.Errorf("Wrong md5 %s", md5)
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}
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// Grow to 10MB + 100B (partial block on the end)
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sz = 10*1024*1024 + 100
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file.Truncate(int64(sz))
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test_helpers.VerifySize(t, fn, sz)
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if md5 := test_helpers.Md5fn(fn); md5 != "c23ea79b857b91a7ff07c6ecf185f1ca" {
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t.Errorf("Wrong md5 %s", md5)
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}
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// Grow to 20MB (creates file holes, partial block on the front)
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sz = 20 * 1024 * 1024
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file.Truncate(int64(sz))
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test_helpers.VerifySize(t, fn, sz)
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if md5 := test_helpers.Md5fn(fn); md5 != "8f4e33f3dc3e414ff94e5fb6905cba8c" {
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t.Errorf("Wrong md5 %s", md5)
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}
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}
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const FALLOC_DEFAULT = 0x00
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const FALLOC_FL_KEEP_SIZE = 0x01
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func TestFallocate(t *testing.T) {
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if runtime.GOOS == "darwin" {
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t.Skipf("OSX does not support fallocate")
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}
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fn := test_helpers.DefaultPlainDir + "/fallocate"
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file, err := os.Create(fn)
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if err != nil {
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t.FailNow()
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}
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var nBlocks int64
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fd := int(file.Fd())
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_, nBlocks = test_helpers.Du(t, fd)
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if nBlocks != 0 {
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t.Fatalf("Empty file has %d blocks", nBlocks)
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}
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// Allocate 30 bytes, keep size
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// gocryptfs || (0 blocks)
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// ext4 | d | (1 block)
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err = syscallcompat.Fallocate(fd, FALLOC_FL_KEEP_SIZE, 0, 30)
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if err != nil {
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t.Error(err)
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}
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_, nBlocks = test_helpers.Du(t, fd)
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if want := 1; nBlocks/8 != int64(want) {
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t.Errorf("Expected %d 4k block(s), got %d", want, nBlocks/8)
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}
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test_helpers.VerifySize(t, fn, 0)
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// Three ciphertext blocks. The middle one should be a file hole.
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// gocryptfs | h | h | d| (1 block)
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// ext4 | d | h | d | (2 blocks)
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// (Note that gocryptfs blocks are slightly bigger than the ext4 blocks,
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// but the last one is partial)
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err = file.Truncate(9000)
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if err != nil {
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t.Fatal(err)
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}
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_, nBlocks = test_helpers.Du(t, fd)
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if want := 2; nBlocks/8 != int64(want) {
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t.Errorf("Expected %d 4k block(s), got %d", want, nBlocks/8)
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}
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if md5 := test_helpers.Md5fn(fn); md5 != "5420afa22f6423a9f59e669540656bb4" {
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t.Errorf("Wrong md5 %s", md5)
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}
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// Allocate the whole file space
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// gocryptfs | h | h | d| (1 block)
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// ext4 | d | d | d | (3 blocks
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err = syscallcompat.Fallocate(fd, FALLOC_DEFAULT, 0, 9000)
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if err != nil {
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t.Fatal(err)
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}
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_, nBlocks = test_helpers.Du(t, fd)
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if want := 3; nBlocks/8 != int64(want) {
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t.Errorf("Expected %d 4k block(s), got %d", want, nBlocks/8)
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}
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// Neither apparent size nor content should have changed
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test_helpers.VerifySize(t, fn, 9000)
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if md5 := test_helpers.Md5fn(fn); md5 != "5420afa22f6423a9f59e669540656bb4" {
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t.Errorf("Wrong md5 %s", md5)
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}
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// Partial block on the end. The first ext4 block is dirtied by the header.
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// gocryptfs | h | h | d| (1 block)
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// ext4 | d | h | d | (2 blocks)
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file.Truncate(0)
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file.Truncate(9000)
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_, nBlocks = test_helpers.Du(t, fd)
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if want := 2; nBlocks/8 != int64(want) {
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t.Errorf("Expected %d 4k block(s), got %d", want, nBlocks/8)
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}
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// Allocate 10 bytes in the second block
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// gocryptfs | h | h | d| (1 block)
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// ext4 | d | d | d | (2 blocks)
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syscallcompat.Fallocate(fd, FALLOC_DEFAULT, 5000, 10)
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_, nBlocks = test_helpers.Du(t, fd)
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if want := 3; nBlocks/8 != int64(want) {
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t.Errorf("Expected %d 4k block(s), got %d", want, nBlocks/8)
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}
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// Neither apparent size nor content should have changed
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test_helpers.VerifySize(t, fn, 9000)
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if md5 := test_helpers.Md5fn(fn); md5 != "5420afa22f6423a9f59e669540656bb4" {
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t.Errorf("Wrong md5 %s", md5)
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}
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// Grow the file to 4 blocks
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// gocryptfs | h | h | d |d| (2 blocks)
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// ext4 | d | d | d | d | (3 blocks)
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syscallcompat.Fallocate(fd, FALLOC_DEFAULT, 15000, 10)
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_, nBlocks = test_helpers.Du(t, fd)
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if want := 4; nBlocks/8 != int64(want) {
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t.Errorf("Expected %d 4k block(s), got %d", want, nBlocks/8)
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}
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test_helpers.VerifySize(t, fn, 15010)
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if md5 := test_helpers.Md5fn(fn); md5 != "c4c44c7a41ab7798a79d093eb44f99fc" {
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t.Errorf("Wrong md5 %s", md5)
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}
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// Shrinking a file using fallocate should have no effect
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for _, off := range []int64{0, 10, 2000, 5000} {
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for _, sz := range []int64{0, 1, 42, 6000} {
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syscallcompat.Fallocate(fd, FALLOC_DEFAULT, off, sz)
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test_helpers.VerifySize(t, fn, 15010)
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if md5 := test_helpers.Md5fn(fn); md5 != "c4c44c7a41ab7798a79d093eb44f99fc" {
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t.Errorf("Wrong md5 %s", md5)
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}
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}
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}
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// Cleanup
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syscall.Unlink(fn)
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}
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func TestAppend(t *testing.T) {
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fn := test_helpers.DefaultPlainDir + "/append"
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file, err := os.Create(fn)
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if err != nil {
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t.FailNow()
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}
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data := []byte("testdata123456789") // length 17
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var buf bytes.Buffer
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var hashWant string
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for i := 0; i <= 500; i++ {
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file.Write(data)
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buf.Write(data)
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hashWant = test_helpers.Md5hex(buf.Bytes())
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hashActual := test_helpers.Md5fn(fn)
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if hashWant != hashActual {
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t.FailNow()
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}
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}
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// Overwrite with the same data
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// Hash must stay the same
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file.Seek(0, 0)
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for i := 0; i <= 500; i++ {
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file.Write(data)
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hashActual := test_helpers.Md5fn(fn)
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if hashWant != hashActual {
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t.FailNow()
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}
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}
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}
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// Create a file with holes by writing to offset 0 (block #0) and
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// offset 4096 (block #1).
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func TestFileHoles(t *testing.T) {
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fn := test_helpers.DefaultPlainDir + "/fileholes"
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file, err := os.Create(fn)
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if err != nil {
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t.Errorf("file create failed")
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}
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foo := []byte("foo")
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file.Write(foo)
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file.WriteAt(foo, 4096)
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_, err = ioutil.ReadFile(fn)
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if err != nil {
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t.Error(err)
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}
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}
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// sContains - does the slice of strings "haystack" contain "needle"?
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func sContains(haystack []string, needle string) bool {
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for _, element := range haystack {
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if element == needle {
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return true
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}
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}
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return false
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}
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func TestRmwRace(t *testing.T) {
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runtime.GOMAXPROCS(10)
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fn := test_helpers.DefaultPlainDir + "/rmwrace"
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f1, err := os.Create(fn)
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if err != nil {
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t.Fatalf("file create failed")
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}
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f2, err := os.Create(fn)
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if err != nil {
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t.Fatalf("file create failed")
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}
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oldBlock := bytes.Repeat([]byte("o"), 4096)
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newBlock := bytes.Repeat([]byte("n"), 4096)
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shortBlock := bytes.Repeat([]byte("s"), 16)
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mergedBlock := make([]byte, 4096)
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copy(mergedBlock, newBlock)
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copy(mergedBlock[4080:], shortBlock)
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goodMd5 := make(map[string]int)
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for i := 0; i < 1000; i++ {
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// Reset to [ooooooooo]
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_, err = f1.WriteAt(oldBlock, 0)
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if err != nil {
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t.Fatalf("Write failed")
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}
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var wg sync.WaitGroup
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wg.Add(2)
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// Write to the end of the file, [....ssss]
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go func() {
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f1.WriteAt(shortBlock, 4080)
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wg.Done()
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}()
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// Overwrite to [nnnnnnn]
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go func() {
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f2.WriteAt(newBlock, 0)
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wg.Done()
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}()
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wg.Wait()
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// The file should be either:
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// [nnnnnnnnnn] (md5: 6c1660fdabccd448d1359f27b3db3c99) or
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// [nnnnnnssss] (md5: da885006a6a284530a427c73ce1e5c32)
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// but it must not be
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// [oooooossss]
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buf, _ := ioutil.ReadFile(fn)
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m := test_helpers.Md5hex(buf)
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goodMd5[m] = goodMd5[m] + 1
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/*
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if m == "6c1660fdabccd448d1359f27b3db3c99" {
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fmt.Println(hex.Dump(buf))
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t.FailNow()
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}
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*/
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}
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}
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// With "--plaintextnames", the name "/gocryptfs.conf" is reserved.
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// Otherwise there should be no restrictions.
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func TestFiltered(t *testing.T) {
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filteredFile := test_helpers.DefaultPlainDir + "/gocryptfs.conf"
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file, err := os.Create(filteredFile)
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if plaintextnames && err == nil {
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t.Errorf("should have failed but didn't")
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} else if !plaintextnames && err != nil {
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t.Error(err)
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}
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file.Close()
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err = os.Remove(filteredFile)
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if plaintextnames && err == nil {
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t.Errorf("should have failed but didn't")
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} else if !plaintextnames && err != nil {
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t.Error(err)
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}
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}
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func TestFilenameEncryption(t *testing.T) {
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file, err := os.Create(test_helpers.DefaultPlainDir + "/TestFilenameEncryption.txt")
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file.Close()
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if err != nil {
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t.Fatal(err)
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}
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_, err = os.Stat(test_helpers.DefaultCipherDir + "/TestFilenameEncryption.txt")
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if plaintextnames && err != nil {
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t.Errorf("plaintextnames not working: %v", err)
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} else if !plaintextnames && err == nil {
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t.Errorf("file name encryption not working")
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}
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}
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// Test Mkdir and Rmdir
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func testMkdirRmdir(t *testing.T) {
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test_helpers.TestMkdirRmdir(t, test_helpers.DefaultPlainDir)
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}
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// Test Rename
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func testRename(t *testing.T) {
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test_helpers.TestRename(t, test_helpers.DefaultPlainDir)
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}
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// Overwrite an empty directory with another directory
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func TestDirOverwrite(t *testing.T) {
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dir1 := test_helpers.DefaultPlainDir + "/DirOverwrite1"
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dir2 := test_helpers.DefaultPlainDir + "/DirOverwrite2"
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err := os.Mkdir(dir1, 0777)
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if err != nil {
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t.Fatal(err)
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}
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err = os.Mkdir(dir2, 0777)
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if err != nil {
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t.Fatal(err)
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}
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err = os.Rename(dir1, dir2)
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if err != nil {
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t.Fatal(err)
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}
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}
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func TestLongNames(t *testing.T) {
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fi, err := ioutil.ReadDir(test_helpers.DefaultCipherDir)
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if err != nil {
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t.Fatal(err)
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|
}
|
|
cnt1 := len(fi)
|
|
wd := test_helpers.DefaultPlainDir + "/"
|
|
// Create file with long name
|
|
n255x := string(bytes.Repeat([]byte("x"), 255))
|
|
f, err := os.Create(wd + n255x)
|
|
if err != nil {
|
|
t.Fatalf("Could not create n255x: %v", err)
|
|
}
|
|
f.Close()
|
|
if !test_helpers.VerifyExistence(wd + n255x) {
|
|
t.Errorf("n255x is not in directory listing")
|
|
}
|
|
// Rename long to long
|
|
n255y := string(bytes.Repeat([]byte("y"), 255))
|
|
err = os.Rename(wd+n255x, wd+n255y)
|
|
if err != nil {
|
|
t.Fatalf("Could not rename n255x to n255y: %v", err)
|
|
}
|
|
if !test_helpers.VerifyExistence(wd + n255y) {
|
|
t.Errorf("n255y is not in directory listing")
|
|
}
|
|
// Rename long to short
|
|
err = os.Rename(wd+n255y, wd+"short")
|
|
if err != nil {
|
|
t.Fatalf("Could not rename n255y to short: %v", err)
|
|
}
|
|
if !test_helpers.VerifyExistence(wd + "short") {
|
|
t.Errorf("short is not in directory listing")
|
|
}
|
|
// Rename short to long
|
|
err = os.Rename(wd+"short", wd+n255x)
|
|
if err != nil {
|
|
t.Fatalf("Could not rename short to n255x: %v", err)
|
|
}
|
|
if !test_helpers.VerifyExistence(wd + n255x) {
|
|
t.Errorf("255x is not in directory listing II")
|
|
}
|
|
// Unlink
|
|
err = syscall.Unlink(wd + n255x)
|
|
if err != nil {
|
|
t.Fatalf("Could not unlink n255x: %v", err)
|
|
}
|
|
if test_helpers.VerifyExistence(wd + n255x) {
|
|
t.Errorf("n255x still there after unlink")
|
|
}
|
|
// Long symlink
|
|
n255s := string(bytes.Repeat([]byte("s"), 255))
|
|
err = os.Symlink("/etc/motd", wd+n255s)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if !test_helpers.VerifyExistence(wd + n255s) {
|
|
t.Errorf("n255s is not in directory listing")
|
|
}
|
|
err = syscall.Unlink(wd + n255s)
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
// Long dir
|
|
n255d := string(bytes.Repeat([]byte("d"), 255))
|
|
err = os.Mkdir(wd+n255d, 0777)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
err = syscall.Rmdir(wd + n255d)
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
// Check for orphaned files
|
|
fi, err = ioutil.ReadDir(test_helpers.DefaultCipherDir)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
cnt2 := len(fi)
|
|
if cnt1 != cnt2 {
|
|
t.Errorf("Leftover files, cnt1=%d cnt2=%d", cnt1, cnt2)
|
|
}
|
|
}
|
|
|
|
func TestLchown(t *testing.T) {
|
|
name := test_helpers.DefaultPlainDir + "/symlink"
|
|
err := os.Symlink("/target/does/not/exist", name)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
err = os.Chown(name, os.Getuid(), os.Getgid())
|
|
if err == nil {
|
|
t.Error("Chown on dangling symlink should fail")
|
|
}
|
|
err = os.Lchown(name, os.Getuid(), os.Getgid())
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
}
|
|
|
|
// Set nanoseconds by path, normal file
|
|
func TestUtimesNano(t *testing.T) {
|
|
path := test_helpers.DefaultPlainDir + "/utimesnano"
|
|
err := ioutil.WriteFile(path, []byte("foobar"), 0600)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
ts := make([]syscall.Timespec, 2)
|
|
// atime
|
|
ts[0].Sec = 1
|
|
ts[0].Nsec = 2
|
|
// mtime
|
|
ts[1].Sec = 3
|
|
ts[1].Nsec = 4
|
|
err = syscall.UtimesNano(path, ts)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
var st syscall.Stat_t
|
|
err = syscall.Stat(path, &st)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if st.Atim != ts[0] {
|
|
if st.Atim.Nsec == 0 {
|
|
// TODO remove this once the pull request is merged
|
|
t.Skip("Known limitation, https://github.com/hanwen/go-fuse/pull/131")
|
|
}
|
|
t.Errorf("Wrong atime: %v, want: %v", st.Atim, ts[0])
|
|
}
|
|
if st.Mtim != ts[1] {
|
|
t.Errorf("Wrong mtime: %v, want: %v", st.Mtim, ts[1])
|
|
}
|
|
}
|
|
|
|
// Set nanoseconds by path, symlink
|
|
func TestUtimesNanoSymlink(t *testing.T) {
|
|
path := test_helpers.DefaultPlainDir + "/utimesnano_symlink"
|
|
err := os.Symlink("/some/nonexisting/file", path)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
// syscall.UtimesNano does not provide a way to pass AT_SYMLINK_NOFOLLOW,
|
|
// so we call the external utility "touch", which does.
|
|
cmd := exec.Command("touch", "--no-dereference", path)
|
|
cmd.Stderr = os.Stderr
|
|
cmd.Stdout = os.Stdout
|
|
err = cmd.Run()
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
}
|
|
|
|
// Set nanoseconds by fd
|
|
func TestUtimesNanoFd(t *testing.T) {
|
|
path := test_helpers.DefaultPlainDir + "/utimesnanofd"
|
|
f, err := os.Create(path)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
ts := make([]syscall.Timespec, 2)
|
|
// atime
|
|
ts[0].Sec = 5
|
|
ts[0].Nsec = 6
|
|
// mtime
|
|
ts[1].Sec = 7
|
|
ts[1].Nsec = 8
|
|
|
|
procPath := fmt.Sprintf("/proc/self/fd/%d", f.Fd())
|
|
err = syscall.UtimesNano(procPath, ts)
|
|
if err != nil {
|
|
t.Fatalf("%s: %v", procPath, err)
|
|
}
|
|
|
|
var st syscall.Stat_t
|
|
err = syscall.Stat(path, &st)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if st.Atim != ts[0] {
|
|
if st.Atim.Nsec == 0 {
|
|
// TODO remove this once the pull request is merged
|
|
t.Skip("Known limitation, https://github.com/hanwen/go-fuse/pull/131")
|
|
}
|
|
t.Errorf("Wrong atime: %v, want: %v", st.Atim, ts[0])
|
|
}
|
|
if st.Mtim != ts[1] {
|
|
t.Errorf("Wrong mtime: %v, want: %v", st.Mtim, ts[1])
|
|
}
|
|
}
|