| 1 | package docs |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
| 5 | "encoding/base64" |
| 6 | "errors" |
| 7 | "testing" |
| 8 | |
| 9 | "github.com/google/uuid" |
| 10 | ) |
| 11 | |
| 12 | func TestContentCipherAuthenticatesRowIdentity(t *testing.T) { |
| 13 | c, err := newContentCipher(base64.StdEncoding.EncodeToString(bytes.Repeat([]byte{41}, 32)), "production") |
| 14 | if err != nil { |
| 15 | t.Fatal(err) |
| 16 | } |
| 17 | guid := uuid.NewString() |
| 18 | body := []byte("private body not shared with another document") |
| 19 | sealed, err := c.seal(contentSnapshotKind, guid, 42, 4, body) |
| 20 | if err != nil { |
| 21 | t.Fatal(err) |
| 22 | } |
| 23 | got, err := c.open(contentSnapshotKind, guid, 42, 4, sealed) |
| 24 | if err != nil || !bytes.Equal(got, body) { |
| 25 | t.Fatalf("round trip: %q, %v", got, err) |
| 26 | } |
| 27 | if bytes.Contains(sealed, body) { |
| 28 | t.Fatal("ciphertext contains plaintext") |
| 29 | } |
| 30 | for _, tc := range []struct { |
| 31 | name string |
| 32 | kind byte |
| 33 | guid string |
| 34 | seq int64 |
| 35 | abi uint32 |
| 36 | }{ |
| 37 | {"document", contentSnapshotKind, uuid.NewString(), 42, 4}, |
| 38 | {"sequence", contentSnapshotKind, guid, 43, 4}, |
| 39 | {"kind", contentUpdateKind, guid, 42, 4}, |
| 40 | {"abi", contentSnapshotKind, guid, 42, 5}, |
| 41 | } { |
| 42 | t.Run(tc.name, func(t *testing.T) { |
| 43 | if _, err := c.open(tc.kind, tc.guid, tc.seq, tc.abi, sealed); !errors.Is(err, errContentAuthentication) { |
| 44 | t.Fatalf("authentication: %v", err) |
| 45 | } |
| 46 | }) |
| 47 | } |
| 48 | sealed[len(sealed)-1] ^= 1 |
| 49 | if _, err := c.open(contentSnapshotKind, guid, 42, 4, sealed); !errors.Is(err, errContentAuthentication) { |
| 50 | t.Fatalf("tamper: %v", err) |
| 51 | } |
| 52 | for n := 0; n < c.aead.NonceSize()+c.aead.Overhead(); n++ { |
| 53 | if _, err := c.open(contentSnapshotKind, guid, 42, 4, sealed[:n]); !errors.Is(err, errContentAuthentication) { |
| 54 | t.Fatalf("truncation %d: %v", n, err) |
| 55 | } |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | func TestContentCipherKeysAndNonces(t *testing.T) { |
| 60 | for _, encoded := range []string{"", "not-base64", base64.StdEncoding.EncodeToString([]byte("short")), base64.StdEncoding.EncodeToString(developmentContentKey[:])} { |
| 61 | if _, err := newContentCipher(encoded, "production"); !errors.Is(err, errContentKey) { |
| 62 | t.Fatalf("invalid production key accepted: %v", err) |
| 63 | } |
| 64 | } |
| 65 | a, err := newContentCipher("", "development") |
| 66 | if err != nil { |
| 67 | t.Fatal(err) |
| 68 | } |
| 69 | b, err := newContentCipher(base64.StdEncoding.EncodeToString(bytes.Repeat([]byte{42}, 32)), "development") |
| 70 | if err != nil { |
| 71 | t.Fatal(err) |
| 72 | } |
| 73 | guid := uuid.NewString() |
| 74 | seen := make(map[string]bool) |
| 75 | for i := 0; i < 100; i++ { |
| 76 | sealed, err := a.seal(contentUpdateKind, guid, 1, 0, []byte("body")) |
| 77 | if err != nil { |
| 78 | t.Fatal(err) |
| 79 | } |
| 80 | nonce := string(sealed[:a.aead.NonceSize()]) |
| 81 | if seen[nonce] { |
| 82 | t.Fatal("nonce repeated") |
| 83 | } |
| 84 | seen[nonce] = true |
| 85 | if _, err := b.open(contentUpdateKind, guid, 1, 0, sealed); !errors.Is(err, errContentAuthentication) { |
| 86 | t.Fatalf("wrong key: %v", err) |
| 87 | } |
| 88 | } |
| 89 | if _, err := a.seal(contentUpdateKind, "broken-guid", 1, 0, nil); !errors.Is(err, errContentAuthentication) { |
| 90 | t.Fatalf("invalid guid: %v", err) |
| 91 | } |
| 92 | } |
| 93 | |
amadan