restic/key_test.go

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package restic_test
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import (
"flag"
"io"
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"io/ioutil"
"os"
"testing"
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"github.com/restic/restic"
"github.com/restic/restic/backend"
"github.com/restic/restic/chunker"
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)
var testPassword = "foobar"
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var testCleanup = flag.Bool("test.cleanup", true, "clean up after running tests (remove local backend directory with all content)")
var testLargeCrypto = flag.Bool("test.largecrypto", false, "also test crypto functions with large payloads")
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func setupBackend(t testing.TB) restic.Server {
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tempdir, err := ioutil.TempDir("", "restic-test-")
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ok(t, err)
b, err := backend.CreateLocal(tempdir)
ok(t, err)
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return restic.NewServer(b)
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}
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func teardownBackend(t testing.TB, s restic.Server) {
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if !*testCleanup {
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l := s.Backend().(*backend.Local)
t.Logf("leaving local backend at %s\n", l.Location())
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return
}
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ok(t, s.Delete())
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}
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func setupKey(t testing.TB, s restic.Server, password string) *restic.Key {
k, err := restic.CreateKey(s, password)
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ok(t, err)
return k
}
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func TestRepo(t *testing.T) {
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s := setupBackend(t)
defer teardownBackend(t, s)
_ = setupKey(t, s, testPassword)
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}
func TestEncryptDecrypt(t *testing.T) {
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s := setupBackend(t)
defer teardownBackend(t, s)
k := setupKey(t, s, testPassword)
tests := []int{5, 23, 2<<18 + 23, 1 << 20}
if *testLargeCrypto {
tests = append(tests, 7<<20+123)
}
for _, size := range tests {
data := make([]byte, size)
f, err := os.Open("/dev/urandom")
ok(t, err)
_, err = io.ReadFull(f, data)
ok(t, err)
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ciphertext := restic.GetChunkBuf("TestEncryptDecrypt")
n, err := k.Encrypt(ciphertext, data)
ok(t, err)
plaintext, err := k.Decrypt(ciphertext[:n])
ok(t, err)
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restic.FreeChunkBuf("TestEncryptDecrypt", ciphertext)
equals(t, plaintext, data)
}
}
func TestSmallBuffer(t *testing.T) {
s := setupBackend(t)
defer teardownBackend(t, s)
k := setupKey(t, s, testPassword)
size := 600
data := make([]byte, size)
f, err := os.Open("/dev/urandom")
ok(t, err)
_, err = io.ReadFull(f, data)
ok(t, err)
ciphertext := make([]byte, size/2)
_, err = k.Encrypt(ciphertext, data)
// this must throw an error, since the target slice is too small
assert(t, err != nil && err == restic.ErrBufferTooSmall,
"expected restic.ErrBufferTooSmall, got %#v", err)
}
func TestLargeEncrypt(t *testing.T) {
if !*testLargeCrypto {
t.SkipNow()
}
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s := setupBackend(t)
defer teardownBackend(t, s)
k := setupKey(t, s, testPassword)
for _, size := range []int{chunker.MaxSize, chunker.MaxSize + 1, chunker.MaxSize + 1<<20} {
data := make([]byte, size)
f, err := os.Open("/dev/urandom")
ok(t, err)
_, err = io.ReadFull(f, data)
ok(t, err)
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ciphertext := make([]byte, size+restic.CiphertextExtension)
n, err := k.Encrypt(ciphertext, data)
ok(t, err)
plaintext, err := k.Decrypt(ciphertext[:n])
ok(t, err)
equals(t, plaintext, data)
}
}
func BenchmarkEncrypt(b *testing.B) {
size := 8 << 20 // 8MiB
data := make([]byte, size)
be := setupBackend(b)
defer teardownBackend(b, be)
k := setupKey(b, be, testPassword)
b.ResetTimer()
b.SetBytes(int64(size))
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buf := restic.GetChunkBuf("BenchmarkEncrypt")
for i := 0; i < b.N; i++ {
_, err := k.Encrypt(buf, data)
ok(b, err)
}
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restic.FreeChunkBuf("BenchmarkEncrypt", buf)
}
func BenchmarkDecrypt(b *testing.B) {
size := 8 << 20 // 8MiB
data := make([]byte, size)
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s := setupBackend(b)
defer teardownBackend(b, s)
k := setupKey(b, s, testPassword)
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ciphertext := restic.GetChunkBuf("BenchmarkDecrypt")
n, err := k.Encrypt(ciphertext, data)
ok(b, err)
b.ResetTimer()
b.SetBytes(int64(size))
for i := 0; i < b.N; i++ {
_, err := k.Decrypt(ciphertext[:n])
ok(b, err)
}
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restic.FreeChunkBuf("BenchmarkDecrypt", ciphertext)
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}