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package util
import (
"bytes"
"crypto/sha256"
"crypto/sha512"
"encoding/hex"
"hash"
"testing"
"github.com/theupdateframework/go-tuf/data"
. "gopkg.in/check.v1"
)
// Hook up gocheck into the "go test" runner.
func Test(t *testing.T) { TestingT(t) }
type UtilSuite struct{}
var _ = Suite(&UtilSuite{})
func (UtilSuite) TestGenerateTargetFileMetaDefault(c *C) {
// default is sha512
r := bytes.NewReader([]byte("foo"))
meta, err := GenerateTargetFileMeta(r)
c.Assert(err, IsNil)
c.Assert(meta.Length, Equals, int64(3))
hashes := meta.Hashes
c.Assert(hashes, HasLen, 1)
hash, ok := hashes["sha512"]
if !ok {
c.Fatal("missing sha512 hash")
}
c.Assert(hash.String(), DeepEquals, "f7fbba6e0636f890e56fbbf3283e524c6fa3204ae298382d624741d0dc6638326e282c41be5e4254d8820772c5518a2c5a8c0c7f7eda19594a7eb539453e1ed7")
}
func (UtilSuite) TestGenerateTargetFileMetaExplicit(c *C) {
r := bytes.NewReader([]byte("foo"))
meta, err := GenerateTargetFileMeta(r, "sha256", "sha512")
c.Assert(err, IsNil)
c.Assert(meta.Length, Equals, int64(3))
hashes := meta.Hashes
c.Assert(hashes, HasLen, 2)
for name, val := range map[string]string{
"sha256": "2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae",
"sha512": "f7fbba6e0636f890e56fbbf3283e524c6fa3204ae298382d624741d0dc6638326e282c41be5e4254d8820772c5518a2c5a8c0c7f7eda19594a7eb539453e1ed7",
} {
hash, ok := hashes[name]
if !ok {
c.Fatalf("missing %s hash", name)
}
c.Assert(hash.String(), DeepEquals, val)
}
}
func makeHashes(c *C, hashes map[string]string) data.Hashes {
h := make(map[string]data.HexBytes, len(hashes))
for typ, hash := range hashes {
v, err := hex.DecodeString(hash)
c.Assert(err, IsNil)
h[typ] = v
}
return h
}
type testMetaFile struct {
name string
actual data.FileMeta
expected data.FileMeta
err func(testMetaFile) error
}
func testMetaFileCases(c *C) []testMetaFile {
fileMeta := func(c *C, length int64, hashes map[string]string) data.FileMeta {
return data.FileMeta{
Length: length,
Hashes: makeHashes(c, hashes),
}
}
return []testMetaFile{
{
name: "wrong length",
actual: data.FileMeta{Length: 1},
expected: data.FileMeta{Length: 2},
err: func(testMetaFile) error { return ErrWrongLength{Actual: 1, Expected: 2} },
},
{
name: "wrong sha512 hash",
actual: fileMeta(c, 10, map[string]string{"sha512": "111111"}),
expected: fileMeta(c, 10, map[string]string{"sha512": "222222"}),
err: func(t testMetaFile) error {
return ErrWrongHash{"sha512", t.expected.Hashes["sha512"], t.actual.Hashes["sha512"]}
},
},
{
name: "intersecting hashes",
actual: fileMeta(c, 10, map[string]string{"sha512": "111111", "md5": "222222"}),
expected: fileMeta(c, 10, map[string]string{"sha512": "111111", "sha256": "333333"}),
err: func(testMetaFile) error { return nil },
},
{
name: "no common hashes",
actual: fileMeta(c, 10, map[string]string{"sha512": "111111"}),
expected: fileMeta(c, 10, map[string]string{"sha256": "222222", "md5": "333333"}),
err: func(t testMetaFile) error { return ErrNoCommonHash{t.expected.Hashes, t.actual.Hashes} },
},
}
}
func (UtilSuite) TestSnapshotFileMetaEqual(c *C) {
type test struct {
name string
actual data.SnapshotFileMeta
expected data.SnapshotFileMeta
err func(test) error
}
fileMeta := func(version int64, length int64, hashes map[string]string) data.SnapshotFileMeta {
return data.SnapshotFileMeta{
Length: length,
Hashes: makeHashes(c, hashes),
Version: version,
}
}
tests := []test{
{
name: "same version",
actual: fileMeta(1, 10, map[string]string{"sha512": "111111"}),
expected: fileMeta(1, 10, map[string]string{"sha512": "111111"}),
err: func(test) error { return nil },
},
{
name: "wrong version",
actual: fileMeta(0, 10, map[string]string{"sha512": "111111"}),
expected: fileMeta(1, 10, map[string]string{"sha512": "111111"}),
err: func(test) error { return ErrWrongVersion{Expected: 1, Actual: 0} },
},
{
name: "wrong version",
actual: fileMeta(1, 10, map[string]string{"sha512": "111111"}),
expected: fileMeta(0, 10, map[string]string{"sha512": "111111"}),
err: func(test) error { return ErrWrongVersion{Expected: 0, Actual: 1} },
},
{
name: "wrong version",
actual: fileMeta(1, 10, map[string]string{"sha512": "111111"}),
expected: fileMeta(2, 10, map[string]string{"sha512": "111111"}),
err: func(test) error { return ErrWrongVersion{Expected: 2, Actual: 1} },
},
}
for _, t := range tests {
c.Assert(SnapshotFileMetaEqual(t.actual, t.expected), DeepEquals, t.err(t), Commentf("name = %s", t.name))
}
for _, t := range testMetaFileCases(c) {
actual := data.SnapshotFileMeta{Length: t.actual.Length, Hashes: t.actual.Hashes}
expected := data.SnapshotFileMeta{Length: t.expected.Length, Hashes: t.expected.Hashes}
c.Assert(SnapshotFileMetaEqual(actual, expected), DeepEquals, t.err(t), Commentf("name = %s %d %d", t.name, t.actual.Length, t.expected.Length))
c.Assert(FileMetaEqual(t.actual, t.expected), DeepEquals, t.err(t), Commentf("name = %s", t.name))
}
}
func (UtilSuite) TestNormalizeTarget(c *C) {
for before, after := range map[string]string{
"": "",
"foo.txt": "foo.txt",
"/bar.txt": "bar.txt",
"foo//bar.txt": "foo/bar.txt",
"/with/./a/dot": "with/a/dot",
"/with/double/../dot": "with/dot",
} {
c.Assert(NormalizeTarget(before), Equals, after)
}
}
func (UtilSuite) TestHashedPaths(c *C) {
hexBytes := func(s string) data.HexBytes {
v, err := hex.DecodeString(s)
c.Assert(err, IsNil)
return v
}
hashes := data.Hashes{
"sha512": hexBytes("abc123"),
"sha256": hexBytes("def456"),
}
paths := HashedPaths("foo/bar.txt", hashes)
// cannot use DeepEquals as the returned order is non-deterministic
c.Assert(paths, HasLen, 2)
expected := map[string]struct{}{"foo/abc123.bar.txt": {}, "foo/def456.bar.txt": {}}
for _, path := range paths {
if _, ok := expected[path]; !ok {
c.Fatalf("unexpected path: %s", path)
}
delete(expected, path)
}
}
func (UtilSuite) TestVersionEqual(c *C) {
c.Assert(VersionEqual(1, 1), IsNil)
c.Assert(VersionEqual(1, 3), Equals, ErrWrongVersion{3, 1})
}
func makeHash(b []byte, alg string) []byte {
var h hash.Hash
switch alg {
case "sha256":
h = sha256.New()
case "sha512":
h = sha512.New()
}
h.Write(b)
return h.Sum(nil)
}
func (UtilSuite) TestBytesMatchLenAndHashes(c *C) {
type test struct {
name string
bytes []byte
length int64
hashes data.Hashes
err func(test) error
}
b := []byte{82, 253, 252, 7, 33, 130, 101, 79, 22, 63, 95, 15, 154, 98, 29, 114}
bhashes := data.Hashes{
"sha512": makeHash(b, "sha512"),
"sha256": makeHash(b, "sha256"),
}
tests := []test{
{
name: "correct len and hashes",
bytes: b,
length: 16,
hashes: bhashes,
err: func(test) error { return nil },
},
{
name: "incorrect len",
bytes: b,
length: 32,
hashes: bhashes,
err: func(test) error { return ErrWrongLength{32, 16} },
},
{
name: "incorrect hashes sha512",
bytes: b,
length: 16,
hashes: data.Hashes{
"sha512": makeHash(b, "sha256"),
},
err: func(test) error { return ErrWrongHash{"sha512", bhashes["sha256"], bhashes["sha512"]} },
},
{
name: "incorrect hashes sha256",
bytes: b,
length: 16,
hashes: data.Hashes{
"sha256": makeHash(b, "sha512"),
},
err: func(test) error { return ErrWrongHash{"sha256", bhashes["sha512"], bhashes["sha256"]} },
},
{
name: "incorrect len and hashes",
bytes: b,
length: 32,
hashes: data.Hashes{
"sha512": makeHash(b, "sha256"),
"sha256": makeHash(b, "sha512"),
},
err: func(test) error { return ErrWrongLength{32, 16} },
},
}
for _, t := range tests {
c.Assert(BytesMatchLenAndHashes(t.bytes, t.length, t.hashes), DeepEquals, t.err(t), Commentf("name = %s", t.name))
}
}
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