327 lines
6.8 KiB
Go
327 lines
6.8 KiB
Go
package integration_tests
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// File reading, writing, modification, truncate
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import (
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"bytes"
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"crypto/md5"
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"encoding/hex"
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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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"runtime"
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"sync"
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"syscall"
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"testing"
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)
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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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var defaultonly bool
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flag.BoolVar(&defaultonly, "defaultonly", false, "Only test default configuration (openssl=true, plaintextnames=false)")
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flag.Parse()
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if testing.Verbose() {
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fmt.Printf("***** Testing with OpenSSL\n")
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}
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resetTmpDir()
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mount(defaultCipherDir, defaultPlainDir, "--zerokey")
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r := m.Run()
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unmount(defaultPlainDir)
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if defaultonly {
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os.Exit(r)
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}
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if testing.Verbose() {
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fmt.Printf("***** Testing with native Go crypto\n")
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}
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resetTmpDir()
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mount(defaultCipherDir, defaultPlainDir, "--zerokey", "--openssl=false")
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r = m.Run()
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unmount(defaultPlainDir)
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if testing.Verbose() {
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fmt.Printf("***** Testing \"--plaintextnames\"\n")
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}
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resetTmpDir()
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mount(defaultCipherDir, defaultPlainDir, "--zerokey", "--plaintextnames")
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plaintextNames = true
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r = m.Run()
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unmount(defaultPlainDir)
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os.Exit(r)
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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(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\n", 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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verifySize(t, defaultPlainDir+fn, n)
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bin := md5.Sum(d)
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hashWant := hex.EncodeToString(bin[:])
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hashActual := md5fn(defaultPlainDir + fn)
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if hashActual != hashWant {
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t.Errorf("Wrong content, hashWant=%s hashActual=%s\n", 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 TestWrite1Mx100(t *testing.T) {
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hashWant := testWriteN(t, "1Mx100", 1024*1024)
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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 := md5fn(defaultPlainDir + "1M")
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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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func TestTruncate(t *testing.T) {
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fn := 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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verifySize(t, fn, 7000)
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if md5fn(fn) != "95d4ec7038e3e4fdbd5f15c34c3f0b34" {
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t.Errorf("wrong content")
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}
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// Shrink - needs RMW
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file.Truncate(6999)
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verifySize(t, fn, 6999)
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if md5fn(fn) != "35fd15873ec6c35380064a41b9b9683b" {
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t.Errorf("wrong content")
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}
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// Shrink to one partial block
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file.Truncate(465)
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verifySize(t, fn, 465)
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if md5fn(fn) != "a1534d6e98a6b21386456a8f66c55260" {
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t.Errorf("wrong content")
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}
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// Grow to exactly one block
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file.Truncate(4096)
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verifySize(t, fn, 4096)
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if md5fn(fn) != "620f0b67a91f7f74151bc5be745b7110" {
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t.Errorf("wrong content")
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}
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}
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func TestAppend(t *testing.T) {
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fn := 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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bin := md5.Sum(buf.Bytes())
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hashWant = hex.EncodeToString(bin[:])
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hashActual := 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 := 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 := 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 := 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 := 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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if testing.Verbose() {
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fmt.Println(goodMd5)
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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 := defaultPlainDir + "gocryptfs.conf"
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file, err := os.Create(filteredFile)
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if plaintextNames == true && err == nil {
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t.Errorf("should have failed but didn't")
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} else if plaintextNames == false && 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 == true && err == nil {
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t.Errorf("should have failed but didn't")
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} else if plaintextNames == false && 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(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(defaultCipherDir + "TestFilenameEncryption.txt")
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if plaintextNames == true && err != nil {
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t.Errorf("plaintextnames not working: %v", err)
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} else if plaintextNames == false && 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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dir := defaultPlainDir + "dir1"
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err := os.Mkdir(dir, 0777)
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if err != nil {
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t.Fatal(err)
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}
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err = syscall.Rmdir(dir)
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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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