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6381959850
rclone/crypt/cipher_test.go
Stephen Harris e1647a5a08 crypt: Fix obfuscate filename encryption method 
Fix issue #1315 where filenames calculated with a base distance of zero
(ie the characters add up to 0(mod 256) aren't de-obfuscated on reading.
This was due to overloading of "0" to also mean "invalid UTF8; no rotation",
so we remove that double meaning
2017-04-22 09:16:00 +01:00

1122 lines
40 KiB
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package crypt
import (
"bytes"
"encoding/base32"
"fmt"
"io"
"io/ioutil"
"strings"
"testing"
"github.com/ncw/rclone/crypt/pkcs7"
"github.com/pkg/errors"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestNewNameEncryptionMode(t *testing.T) {
for _, test := range []struct {
in string
expected NameEncryptionMode
expectedErr string
}{
{"off", NameEncryptionOff, ""},
{"standard", NameEncryptionStandard, ""},
{"obfuscate", NameEncryptionObfuscated, ""},
{"potato", NameEncryptionMode(0), "Unknown file name encryption mode \"potato\""},
} {
actual, actualErr := NewNameEncryptionMode(test.in)
assert.Equal(t, actual, test.expected)
if test.expectedErr == "" {
assert.NoError(t, actualErr)
} else {
assert.Error(t, actualErr, test.expectedErr)
}
}
}
func TestNewNameEncryptionModeString(t *testing.T) {
assert.Equal(t, NameEncryptionOff.String(), "off")
assert.Equal(t, NameEncryptionStandard.String(), "standard")
assert.Equal(t, NameEncryptionObfuscated.String(), "obfuscate")
assert.Equal(t, NameEncryptionMode(3).String(), "Unknown mode #3")
}
func TestValidString(t *testing.T) {
for _, test := range []struct {
in string
expected error
}{
{"", nil},
{"\x01", ErrorBadDecryptControlChar},
{"a\x02", ErrorBadDecryptControlChar},
{"abc\x03", ErrorBadDecryptControlChar},
{"abc\x04def", ErrorBadDecryptControlChar},
{"\x05d", ErrorBadDecryptControlChar},
{"\x06def", ErrorBadDecryptControlChar},
{"\x07", ErrorBadDecryptControlChar},
{"\x08", ErrorBadDecryptControlChar},
{"\x09", ErrorBadDecryptControlChar},
{"\x0A", ErrorBadDecryptControlChar},
{"\x0B", ErrorBadDecryptControlChar},
{"\x0C", ErrorBadDecryptControlChar},
{"\x0D", ErrorBadDecryptControlChar},
{"\x0E", ErrorBadDecryptControlChar},
{"\x0F", ErrorBadDecryptControlChar},
{"\x10", ErrorBadDecryptControlChar},
{"\x11", ErrorBadDecryptControlChar},
{"\x12", ErrorBadDecryptControlChar},
{"\x13", ErrorBadDecryptControlChar},
{"\x14", ErrorBadDecryptControlChar},
{"\x15", ErrorBadDecryptControlChar},
{"\x16", ErrorBadDecryptControlChar},
{"\x17", ErrorBadDecryptControlChar},
{"\x18", ErrorBadDecryptControlChar},
{"\x19", ErrorBadDecryptControlChar},
{"\x1A", ErrorBadDecryptControlChar},
{"\x1B", ErrorBadDecryptControlChar},
{"\x1C", ErrorBadDecryptControlChar},
{"\x1D", ErrorBadDecryptControlChar},
{"\x1E", ErrorBadDecryptControlChar},
{"\x1F", ErrorBadDecryptControlChar},
{"\x20", nil},
{"\x7E", nil},
{"\x7F", ErrorBadDecryptControlChar},
{"£100", nil},
{`hello? sausage/êé/Hello, 世界/ " ' @ < > & ?/z.txt`, nil},
{"£100", nil},
// Following tests from https://secure.php.net/manual/en/reference.pcre.pattern.modifiers.php#54805
{"a", nil}, // Valid ASCII
{"\xc3\xb1", nil}, // Valid 2 Octet Sequence
{"\xc3\x28", ErrorBadDecryptUTF8}, // Invalid 2 Octet Sequence
{"\xa0\xa1", ErrorBadDecryptUTF8}, // Invalid Sequence Identifier
{"\xe2\x82\xa1", nil}, // Valid 3 Octet Sequence
{"\xe2\x28\xa1", ErrorBadDecryptUTF8}, // Invalid 3 Octet Sequence (in 2nd Octet)
{"\xe2\x82\x28", ErrorBadDecryptUTF8}, // Invalid 3 Octet Sequence (in 3rd Octet)
{"\xf0\x90\x8c\xbc", nil}, // Valid 4 Octet Sequence
{"\xf0\x28\x8c\xbc", ErrorBadDecryptUTF8}, // Invalid 4 Octet Sequence (in 2nd Octet)
{"\xf0\x90\x28\xbc", ErrorBadDecryptUTF8}, // Invalid 4 Octet Sequence (in 3rd Octet)
{"\xf0\x28\x8c\x28", ErrorBadDecryptUTF8}, // Invalid 4 Octet Sequence (in 4th Octet)
{"\xf8\xa1\xa1\xa1\xa1", ErrorBadDecryptUTF8}, // Valid 5 Octet Sequence (but not Unicode!)
{"\xfc\xa1\xa1\xa1\xa1\xa1", ErrorBadDecryptUTF8}, // Valid 6 Octet Sequence (but not Unicode!)
} {
actual := checkValidString([]byte(test.in))
assert.Equal(t, actual, test.expected, fmt.Sprintf("in=%q", test.in))
}
}
func TestEncodeFileName(t *testing.T) {
for _, test := range []struct {
in string
expected string
}{
{"", ""},
{"1", "64"},
{"12", "64p0"},
{"123", "64p36"},
{"1234", "64p36d0"},
{"12345", "64p36d1l"},
{"123456", "64p36d1l6o"},
{"1234567", "64p36d1l6org"},
{"12345678", "64p36d1l6orjg"},
{"123456789", "64p36d1l6orjge8"},
{"1234567890", "64p36d1l6orjge9g"},
{"12345678901", "64p36d1l6orjge9g64"},
{"123456789012", "64p36d1l6orjge9g64p0"},
{"1234567890123", "64p36d1l6orjge9g64p36"},
{"12345678901234", "64p36d1l6orjge9g64p36d0"},
{"123456789012345", "64p36d1l6orjge9g64p36d1l"},
{"1234567890123456", "64p36d1l6orjge9g64p36d1l6o"},
} {
actual := encodeFileName([]byte(test.in))
assert.Equal(t, actual, test.expected, fmt.Sprintf("in=%q", test.in))
recovered, err := decodeFileName(test.expected)
assert.NoError(t, err)
assert.Equal(t, string(recovered), test.in, fmt.Sprintf("reverse=%q", test.expected))
in := strings.ToUpper(test.expected)
recovered, err = decodeFileName(in)
assert.NoError(t, err)
assert.Equal(t, string(recovered), test.in, fmt.Sprintf("reverse=%q", in))
}
}
func TestDecodeFileName(t *testing.T) {
// We've tested decoding the valid ones above, now concentrate on the invalid ones
for _, test := range []struct {
in string
expectedErr error
}{
{"64=", ErrorBadBase32Encoding},
{"!", base32.CorruptInputError(0)},
{"hello=hello", base32.CorruptInputError(5)},
} {
actual, actualErr := decodeFileName(test.in)
assert.Equal(t, test.expectedErr, actualErr, fmt.Sprintf("in=%q got actual=%q, err = %v %T", test.in, actual, actualErr, actualErr))
}
}
func TestEncryptSegment(t *testing.T) {
c, _ := newCipher(NameEncryptionStandard, "", "")
for _, test := range []struct {
in string
expected string
}{
{"", ""},
{"1", "p0e52nreeaj0a5ea7s64m4j72s"},
{"12", "l42g6771hnv3an9cgc8cr2n1ng"},
{"123", "qgm4avr35m5loi1th53ato71v0"},
{"1234", "8ivr2e9plj3c3esisjpdisikos"},
{"12345", "rh9vu63q3o29eqmj4bg6gg7s44"},
{"123456", "bn717l3alepn75b2fb2ejmi4b4"},
{"1234567", "n6bo9jmb1qe3b1ogtj5qkf19k8"},
{"12345678", "u9t24j7uaq94dh5q53m3s4t9ok"},
{"123456789", "37hn305g6j12d1g0kkrl7ekbs4"},
{"1234567890", "ot8d91eplaglb62k2b1trm2qv0"},
{"12345678901", "h168vvrgb53qnrtvvmb378qrcs"},
{"123456789012", "s3hsdf9e29ithrqbjqu01t8q2s"},
{"1234567890123", "cf3jimlv1q2oc553mv7s3mh3eo"},
{"12345678901234", "moq0uqdlqrblrc5pa5u5c7hq9g"},
{"123456789012345", "eeam3li4rnommi3a762h5n7meg"},
{"1234567890123456", "mijbj0frqf6ms7frcr6bd9h0env53jv96pjaaoirk7forcgpt70g"},
} {
actual := c.encryptSegment(test.in)
assert.Equal(t, test.expected, actual, fmt.Sprintf("Testing %q", test.in))
recovered, err := c.decryptSegment(test.expected)
assert.NoError(t, err, fmt.Sprintf("Testing reverse %q", test.expected))
assert.Equal(t, test.in, recovered, fmt.Sprintf("Testing reverse %q", test.expected))
in := strings.ToUpper(test.expected)
recovered, err = c.decryptSegment(in)
assert.NoError(t, err, fmt.Sprintf("Testing reverse %q", in))
assert.Equal(t, test.in, recovered, fmt.Sprintf("Testing reverse %q", in))
}
}
func TestDecryptSegment(t *testing.T) {
// We've tested the forwards above, now concentrate on the errors
c, _ := newCipher(NameEncryptionStandard, "", "")
for _, test := range []struct {
in string
expectedErr error
}{
{"64=", ErrorBadBase32Encoding},
{"!", base32.CorruptInputError(0)},
{encodeFileName([]byte("a")), ErrorNotAMultipleOfBlocksize},
{encodeFileName([]byte("123456789abcdef")), ErrorNotAMultipleOfBlocksize},
{encodeFileName([]byte("123456789abcdef0")), pkcs7.ErrorPaddingTooLong},
{c.encryptSegment("\x01"), ErrorBadDecryptControlChar},
{c.encryptSegment("\xc3\x28"), ErrorBadDecryptUTF8},
} {
actual, actualErr := c.decryptSegment(test.in)
assert.Equal(t, test.expectedErr, actualErr, fmt.Sprintf("in=%q got actual=%q, err = %v %T", test.in, actual, actualErr, actualErr))
}
}
func TestEncryptFileName(t *testing.T) {
// First standard mode
c, _ := newCipher(NameEncryptionStandard, "", "")
assert.Equal(t, "p0e52nreeaj0a5ea7s64m4j72s", c.EncryptFileName("1"))
assert.Equal(t, "p0e52nreeaj0a5ea7s64m4j72s/l42g6771hnv3an9cgc8cr2n1ng", c.EncryptFileName("1/12"))
assert.Equal(t, "p0e52nreeaj0a5ea7s64m4j72s/l42g6771hnv3an9cgc8cr2n1ng/qgm4avr35m5loi1th53ato71v0", c.EncryptFileName("1/12/123"))
// Now off mode
c, _ = newCipher(NameEncryptionOff, "", "")
assert.Equal(t, "1/12/123.bin", c.EncryptFileName("1/12/123"))
// Obfuscation mode
c, _ = newCipher(NameEncryptionObfuscated, "", "")
assert.Equal(t, "49.6/99.23/150.890/53.!!lipps", c.EncryptFileName("1/12/123/!hello"))
assert.Equal(t, "161.\u00e4", c.EncryptFileName("\u00a1"))
assert.Equal(t, "160.\u03c2", c.EncryptFileName("\u03a0"))
}
func TestDecryptFileName(t *testing.T) {
for _, test := range []struct {
mode NameEncryptionMode
in string
expected string
expectedErr error
}{
{NameEncryptionStandard, "p0e52nreeaj0a5ea7s64m4j72s", "1", nil},
{NameEncryptionStandard, "p0e52nreeaj0a5ea7s64m4j72s/l42g6771hnv3an9cgc8cr2n1ng", "1/12", nil},
{NameEncryptionStandard, "p0e52nreeAJ0A5EA7S64M4J72S/L42G6771HNv3an9cgc8cr2n1ng", "1/12", nil},
{NameEncryptionStandard, "p0e52nreeaj0a5ea7s64m4j72s/l42g6771hnv3an9cgc8cr2n1ng/qgm4avr35m5loi1th53ato71v0", "1/12/123", nil},
{NameEncryptionStandard, "p0e52nreeaj0a5ea7s64m4j72s/l42g6771hnv3an9cgc8cr2n1/qgm4avr35m5loi1th53ato71v0", "", ErrorNotAMultipleOfBlocksize},
{NameEncryptionOff, "1/12/123.bin", "1/12/123", nil},
{NameEncryptionOff, "1/12/123.bix", "", ErrorNotAnEncryptedFile},
{NameEncryptionOff, ".bin", "", ErrorNotAnEncryptedFile},
{NameEncryptionObfuscated, "!.hello", "hello", nil},
{NameEncryptionObfuscated, "hello", "", ErrorNotAnEncryptedFile},
{NameEncryptionObfuscated, "161.\u00e4", "\u00a1", nil},
{NameEncryptionObfuscated, "160.\u03c2", "\u03a0", nil},
} {
c, _ := newCipher(test.mode, "", "")
actual, actualErr := c.DecryptFileName(test.in)
what := fmt.Sprintf("Testing %q (mode=%v)", test.in, test.mode)
assert.Equal(t, test.expected, actual, what)
assert.Equal(t, test.expectedErr, actualErr, what)
}
}
func TestEncDecMatches(t *testing.T) {
for _, test := range []struct {
mode NameEncryptionMode
in string
}{
{NameEncryptionStandard, "1/2/3/4"},
{NameEncryptionOff, "1/2/3/4"},
{NameEncryptionObfuscated, "1/2/3/4/!hello\u03a0"},
{NameEncryptionObfuscated, "Avatar The Last Airbender"},
} {
c, _ := newCipher(test.mode, "", "")
out, err := c.DecryptFileName(c.EncryptFileName(test.in))
what := fmt.Sprintf("Testing %q (mode=%v)", test.in, test.mode)
assert.Equal(t, out, test.in, what)
assert.Equal(t, err, nil, what)
}
}
func TestEncryptDirName(t *testing.T) {
// First standard mode
c, _ := newCipher(NameEncryptionStandard, "", "")
assert.Equal(t, "p0e52nreeaj0a5ea7s64m4j72s", c.EncryptDirName("1"))
assert.Equal(t, "p0e52nreeaj0a5ea7s64m4j72s/l42g6771hnv3an9cgc8cr2n1ng", c.EncryptDirName("1/12"))
assert.Equal(t, "p0e52nreeaj0a5ea7s64m4j72s/l42g6771hnv3an9cgc8cr2n1ng/qgm4avr35m5loi1th53ato71v0", c.EncryptDirName("1/12/123"))
// Now off mode
c, _ = newCipher(NameEncryptionOff, "", "")
assert.Equal(t, "1/12/123", c.EncryptDirName("1/12/123"))
}
func TestDecryptDirName(t *testing.T) {
for _, test := range []struct {
mode NameEncryptionMode
in string
expected string
expectedErr error
}{
{NameEncryptionStandard, "p0e52nreeaj0a5ea7s64m4j72s", "1", nil},
{NameEncryptionStandard, "p0e52nreeaj0a5ea7s64m4j72s/l42g6771hnv3an9cgc8cr2n1ng", "1/12", nil},
{NameEncryptionStandard, "p0e52nreeAJ0A5EA7S64M4J72S/L42G6771HNv3an9cgc8cr2n1ng", "1/12", nil},
{NameEncryptionStandard, "p0e52nreeaj0a5ea7s64m4j72s/l42g6771hnv3an9cgc8cr2n1ng/qgm4avr35m5loi1th53ato71v0", "1/12/123", nil},
{NameEncryptionStandard, "p0e52nreeaj0a5ea7s64m4j72s/l42g6771hnv3an9cgc8cr2n1/qgm4avr35m5loi1th53ato71v0", "", ErrorNotAMultipleOfBlocksize},
{NameEncryptionOff, "1/12/123.bin", "1/12/123.bin", nil},
{NameEncryptionOff, "1/12/123", "1/12/123", nil},
{NameEncryptionOff, ".bin", ".bin", nil},
} {
c, _ := newCipher(test.mode, "", "")
actual, actualErr := c.DecryptDirName(test.in)
what := fmt.Sprintf("Testing %q (mode=%v)", test.in, test.mode)
assert.Equal(t, test.expected, actual, what)
assert.Equal(t, test.expectedErr, actualErr, what)
}
}
func TestEncryptedSize(t *testing.T) {
c, _ := newCipher(NameEncryptionStandard, "", "")
for _, test := range []struct {
in int64
expected int64
}{
{0, 32},
{1, 32 + 16 + 1},
{65536, 32 + 16 + 65536},
{65537, 32 + 16 + 65536 + 16 + 1},
{1 << 20, 32 + 16*(16+65536)},
{(1 << 20) + 65535, 32 + 16*(16+65536) + 16 + 65535},
{1 << 30, 32 + 16384*(16+65536)},
{(1 << 40) + 1, 32 + 16777216*(16+65536) + 16 + 1},
} {
actual := c.EncryptedSize(test.in)
assert.Equal(t, test.expected, actual, fmt.Sprintf("Testing %d", test.in))
recovered, err := c.DecryptedSize(test.expected)
assert.NoError(t, err, fmt.Sprintf("Testing reverse %d", test.expected))
assert.Equal(t, test.in, recovered, fmt.Sprintf("Testing reverse %d", test.expected))
}
}
func TestDecryptedSize(t *testing.T) {
// Test the errors since we tested the reverse above
c, _ := newCipher(NameEncryptionStandard, "", "")
for _, test := range []struct {
in int64
expectedErr error
}{
{0, ErrorEncryptedFileTooShort},
{0, ErrorEncryptedFileTooShort},
{1, ErrorEncryptedFileTooShort},
{7, ErrorEncryptedFileTooShort},
{32 + 1, ErrorEncryptedFileBadHeader},
{32 + 16, ErrorEncryptedFileBadHeader},
{32 + 16 + 65536 + 1, ErrorEncryptedFileBadHeader},
{32 + 16 + 65536 + 16, ErrorEncryptedFileBadHeader},
} {
_, actualErr := c.DecryptedSize(test.in)
assert.Equal(t, test.expectedErr, actualErr, fmt.Sprintf("Testing %d", test.in))
}
}
func TestNoncePointer(t *testing.T) {
var x nonce
assert.Equal(t, (*[24]byte)(&x), x.pointer())
}
func TestNonceFromReader(t *testing.T) {
var x nonce
buf := bytes.NewBufferString("123456789abcdefghijklmno")
err := x.fromReader(buf)
assert.NoError(t, err)
assert.Equal(t, nonce{'1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o'}, x)
buf = bytes.NewBufferString("123456789abcdefghijklmn")
err = x.fromReader(buf)
assert.Error(t, err, "short read of nonce")
}
func TestNonceFromBuf(t *testing.T) {
var x nonce
buf := []byte("123456789abcdefghijklmnoXXXXXXXX")
x.fromBuf(buf)
assert.Equal(t, nonce{'1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o'}, x)
buf = []byte("0123456789abcdefghijklmn")
x.fromBuf(buf)
assert.Equal(t, nonce{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n'}, x)
buf = []byte("0123456789abcdefghijklm")
assert.Panics(t, func() { x.fromBuf(buf) })
}
func TestNonceIncrement(t *testing.T) {
for _, test := range []struct {
in nonce
out nonce
}{
{
nonce{0x00},
nonce{0x01},
},
{
nonce{0xFF},
nonce{0x00, 0x01},
},
{
nonce{0xFF, 0xFF},
nonce{0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
},
} {
x := test.in
x.increment()
assert.Equal(t, test.out, x)
}
}
func TestNonceAdd(t *testing.T) {
for _, test := range []struct {
add uint64
in nonce
out nonce
}{
{
0x01,
nonce{0x00},
nonce{0x01},
},
{
0xFF,
nonce{0xFF},
nonce{0xFE, 0x01},
},
{
0xFFFF,
nonce{0xFF, 0xFF},
nonce{0xFE, 0xFF, 0x01},
},
{
0xFFFFFF,
nonce{0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0x01},
},
{
0xFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFe, 0xFF, 0xFF, 0xFF, 0x01},
},
{
0xFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0x01},
},
{
0xFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01},
},
{
0xFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
},
{
0xFFFFFFFFFFFFFFFF,
nonce{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
nonce{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
},
} {
x := test.in
x.add(test.add)
assert.Equal(t, test.out, x)
}
}
// randomSource can read or write a random sequence
type randomSource struct {
counter int64
size int64
}
func newRandomSource(size int64) *randomSource {
return &randomSource{
size: size,
}
}
func (r *randomSource) next() byte {
r.counter++
return byte(r.counter % 257)
}
func (r *randomSource) Read(p []byte) (n int, err error) {
for i := range p {
if r.counter >= r.size {
err = io.EOF
break
}
p[i] = r.next()
n++
}
return n, err
}
func (r *randomSource) Write(p []byte) (n int, err error) {
for i := range p {
if p[i] != r.next() {
return 0, errors.Errorf("Error in stream at %d", r.counter)
}
}
return len(p), nil
}
func (r *randomSource) Close() error { return nil }
// Check interfaces
var (
_ io.ReadCloser = (*randomSource)(nil)
_ io.WriteCloser = (*randomSource)(nil)
)
// Test test infrastructure first!
func TestRandomSource(t *testing.T) {
source := newRandomSource(1E8)
sink := newRandomSource(1E8)
n, err := io.Copy(sink, source)
assert.NoError(t, err)
assert.Equal(t, int64(1E8), n)
source = newRandomSource(1E8)
buf := make([]byte, 16)
_, _ = source.Read(buf)
sink = newRandomSource(1E8)
n, err = io.Copy(sink, source)
assert.Error(t, err, "Error in stream")
}
type zeroes struct{}
func (z *zeroes) Read(p []byte) (n int, err error) {
for i := range p {
p[i] = 0
n++
}
return n, nil
}
// Test encrypt decrypt with different buffer sizes
func testEncryptDecrypt(t *testing.T, bufSize int, copySize int64) {
c, err := newCipher(NameEncryptionStandard, "", "")
assert.NoError(t, err)
c.cryptoRand = &zeroes{} // zero out the nonce
buf := make([]byte, bufSize)
source := newRandomSource(copySize)
encrypted, err := c.newEncrypter(source, nil)
assert.NoError(t, err)
decrypted, err := c.newDecrypter(ioutil.NopCloser(encrypted))
assert.NoError(t, err)
sink := newRandomSource(copySize)
n, err := io.CopyBuffer(sink, decrypted, buf)
assert.NoError(t, err)
assert.Equal(t, copySize, n)
blocks := copySize / blockSize
if (copySize % blockSize) != 0 {
blocks++
}
var expectedNonce = nonce{byte(blocks), byte(blocks >> 8), byte(blocks >> 16), byte(blocks >> 32)}
assert.Equal(t, expectedNonce, encrypted.nonce)
assert.Equal(t, expectedNonce, decrypted.nonce)
}
func TestEncryptDecrypt1(t *testing.T) {
testEncryptDecrypt(t, 1, 1E7)
}
func TestEncryptDecrypt32(t *testing.T) {
testEncryptDecrypt(t, 32, 1E8)
}
func TestEncryptDecrypt4096(t *testing.T) {
testEncryptDecrypt(t, 4096, 1E8)
}
func TestEncryptDecrypt65536(t *testing.T) {
testEncryptDecrypt(t, 65536, 1E8)
}
func TestEncryptDecrypt65537(t *testing.T) {
testEncryptDecrypt(t, 65537, 1E8)
}
var (
file0 = []byte{
0x52, 0x43, 0x4c, 0x4f, 0x4e, 0x45, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
}
file1 = []byte{
0x52, 0x43, 0x4c, 0x4f, 0x4e, 0x45, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
0x09, 0x5b, 0x44, 0x6c, 0xd6, 0x23, 0x7b, 0xbc, 0xb0, 0x8d, 0x09, 0xfb, 0x52, 0x4c, 0xe5, 0x65,
0xAA,
}
file16 = []byte{
0x52, 0x43, 0x4c, 0x4f, 0x4e, 0x45, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
0xb9, 0xc4, 0x55, 0x2a, 0x27, 0x10, 0x06, 0x29, 0x18, 0x96, 0x0a, 0x3e, 0x60, 0x8c, 0x29, 0xb9,
0xaa, 0x8a, 0x5e, 0x1e, 0x16, 0x5b, 0x6d, 0x07, 0x5d, 0xe4, 0xe9, 0xbb, 0x36, 0x7f, 0xd6, 0xd4,
}
)
func TestEncryptData(t *testing.T) {
for _, test := range []struct {
in []byte
expected []byte
}{
{[]byte{}, file0},
{[]byte{1}, file1},
{[]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, file16},
} {
c, err := newCipher(NameEncryptionStandard, "", "")
assert.NoError(t, err)
c.cryptoRand = newRandomSource(1E8) // nodge the crypto rand generator
// Check encode works
buf := bytes.NewBuffer(test.in)
encrypted, err := c.EncryptData(buf)
assert.NoError(t, err)
out, err := ioutil.ReadAll(encrypted)
assert.NoError(t, err)
assert.Equal(t, test.expected, out)
// Check we can decode the data properly too...
buf = bytes.NewBuffer(out)
decrypted, err := c.DecryptData(ioutil.NopCloser(buf))
assert.NoError(t, err)
out, err = ioutil.ReadAll(decrypted)
assert.NoError(t, err)
assert.Equal(t, test.in, out)
}
}
func TestNewEncrypter(t *testing.T) {
c, err := newCipher(NameEncryptionStandard, "", "")
assert.NoError(t, err)
c.cryptoRand = newRandomSource(1E8) // nodge the crypto rand generator
z := &zeroes{}
fh, err := c.newEncrypter(z, nil)
assert.NoError(t, err)
assert.Equal(t, nonce{0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18}, fh.nonce)
assert.Equal(t, []byte{'R', 'C', 'L', 'O', 'N', 'E', 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18}, fh.buf[:32])
// Test error path
c.cryptoRand = bytes.NewBufferString("123456789abcdefghijklmn")
fh, err = c.newEncrypter(z, nil)
assert.Nil(t, fh)
assert.Error(t, err, "short read of nonce")
}
// Test the stream returning 0, io.ErrUnexpectedEOF - this used to
// cause a fatal loop
func TestNewEncrypterErrUnexpectedEOF(t *testing.T) {
c, err := newCipher(NameEncryptionStandard, "", "")
assert.NoError(t, err)
in := &errorReader{io.ErrUnexpectedEOF}
fh, err := c.newEncrypter(in, nil)
assert.NoError(t, err)
n, err := io.CopyN(ioutil.Discard, fh, 1E6)
assert.Equal(t, io.ErrUnexpectedEOF, err)
assert.Equal(t, int64(32), n)
}
type errorReader struct {
err error
}
func (er errorReader) Read(p []byte) (n int, err error) {
return 0, er.err
}
type closeDetector struct {
io.Reader
closed int
}
func newCloseDetector(in io.Reader) *closeDetector {
return &closeDetector{
Reader: in,
}
}
func (c *closeDetector) Close() error {
c.closed++
return nil
}
func TestNewDecrypter(t *testing.T) {
c, err := newCipher(NameEncryptionStandard, "", "")
assert.NoError(t, err)
c.cryptoRand = newRandomSource(1E8) // nodge the crypto rand generator
cd := newCloseDetector(bytes.NewBuffer(file0))
fh, err := c.newDecrypter(cd)
assert.NoError(t, err)
// check nonce is in place
assert.Equal(t, file0[8:32], fh.nonce[:])
assert.Equal(t, 0, cd.closed)
// Test error paths
for i := range file0 {
cd := newCloseDetector(bytes.NewBuffer(file0[:i]))
fh, err = c.newDecrypter(cd)
assert.Nil(t, fh)
assert.Error(t, err, ErrorEncryptedFileTooShort.Error())
assert.Equal(t, 1, cd.closed)
}
er := &errorReader{errors.New("potato")}
cd = newCloseDetector(er)
fh, err = c.newDecrypter(cd)
assert.Nil(t, fh)
assert.Error(t, err, "potato")
assert.Equal(t, 1, cd.closed)
// bad magic
file0copy := make([]byte, len(file0))
copy(file0copy, file0)
for i := range fileMagic {
file0copy[i] ^= 0x1
cd := newCloseDetector(bytes.NewBuffer(file0copy))
fh, err := c.newDecrypter(cd)
assert.Nil(t, fh)
assert.Error(t, err, ErrorEncryptedBadMagic.Error())
file0copy[i] ^= 0x1
assert.Equal(t, 1, cd.closed)
}
}
// Test the stream returning 0, io.ErrUnexpectedEOF
func TestNewDecrypterErrUnexpectedEOF(t *testing.T) {
c, err := newCipher(NameEncryptionStandard, "", "")
assert.NoError(t, err)
in2 := &errorReader{io.ErrUnexpectedEOF}
in1 := bytes.NewBuffer(file16)
in := ioutil.NopCloser(io.MultiReader(in1, in2))
fh, err := c.newDecrypter(in)
assert.NoError(t, err)
n, err := io.CopyN(ioutil.Discard, fh, 1E6)
assert.Equal(t, io.ErrUnexpectedEOF, err)
assert.Equal(t, int64(16), n)
}
func TestNewDecrypterSeek(t *testing.T) {
c, err := newCipher(NameEncryptionStandard, "", "")
assert.NoError(t, err)
c.cryptoRand = &zeroes{} // nodge the crypto rand generator
// Make random data
const dataSize = 150000
plaintext, err := ioutil.ReadAll(newRandomSource(dataSize))
assert.NoError(t, err)
// Encrypt the data
buf := bytes.NewBuffer(plaintext)
encrypted, err := c.EncryptData(buf)
assert.NoError(t, err)
ciphertext, err := ioutil.ReadAll(encrypted)
assert.NoError(t, err)
trials := []int{0, 1, 2, 3, 4, 5, 7, 8, 9, 15, 16, 17, 31, 32, 33, 63, 64, 65,
127, 128, 129, 255, 256, 257, 511, 512, 513, 1023, 1024, 1025, 2047, 2048, 2049,
4095, 4096, 4097, 8191, 8192, 8193, 16383, 16384, 16385, 32767, 32768, 32769,
65535, 65536, 65537, 131071, 131072, 131073, dataSize - 1, dataSize}
// Open stream with a seek of underlyingOffset
open := func(underlyingOffset int64) (io.ReadCloser, error) {
return ioutil.NopCloser(bytes.NewBuffer(ciphertext[int(underlyingOffset):])), nil
}
inBlock := make([]byte, 1024)
// Check the seek worked by reading a block and checking it
// against what it should be
check := func(rc ReadSeekCloser, offset int) {
n, err := io.ReadFull(rc, inBlock)
if err != nil && err != io.EOF && err != io.ErrUnexpectedEOF {
require.NoError(t, err)
}
seekedDecrypted := inBlock[:n]
require.Equal(t, plaintext[offset:offset+n], seekedDecrypted)
}
// Now try decoding it with a open/seek
for _, offset := range trials {
rc, err := c.DecryptDataSeek(open, int64(offset))
assert.NoError(t, err)
check(rc, offset)
}
// Now try decoding it with a single open and lots of seeks
rc, err := c.DecryptDataSeek(open, 0)
for _, offset := range trials {
_, err := rc.Seek(int64(offset), 0)
assert.NoError(t, err)
check(rc, offset)
}
}
func TestDecrypterRead(t *testing.T) {
c, err := newCipher(NameEncryptionStandard, "", "")
assert.NoError(t, err)
// Test truncating the file at each possible point
for i := 0; i < len(file16)-1; i++ {
what := fmt.Sprintf("truncating to %d/%d", i, len(file16))
cd := newCloseDetector(bytes.NewBuffer(file16[:i]))
fh, err := c.newDecrypter(cd)
if i < fileHeaderSize {
assert.EqualError(t, err, ErrorEncryptedFileTooShort.Error(), what)
continue
}
if err != nil {
assert.NoError(t, err, what)
continue
}
_, err = ioutil.ReadAll(fh)
var expectedErr error
switch {
case i == fileHeaderSize:
// This would normally produce an error *except* on the first block
expectedErr = nil
default:
expectedErr = io.ErrUnexpectedEOF
}
if expectedErr != nil {
assert.EqualError(t, err, expectedErr.Error(), what)
} else {
assert.NoError(t, err, what)
}
assert.Equal(t, 0, cd.closed, what)
}
// Test producing an error on the file on Read the underlying file
in1 := bytes.NewBuffer(file1)
in2 := &errorReader{errors.New("potato")}
in := io.MultiReader(in1, in2)
cd := newCloseDetector(in)
fh, err := c.newDecrypter(cd)
assert.NoError(t, err)
_, err = ioutil.ReadAll(fh)
assert.Error(t, err, "potato")
assert.Equal(t, 0, cd.closed)
// Test corrupting the input
// shouldn't be able to corrupt any byte without some sort of error
file16copy := make([]byte, len(file16))
copy(file16copy, file16)
for i := range file16copy {
file16copy[i] ^= 0xFF
fh, err := c.newDecrypter(ioutil.NopCloser(bytes.NewBuffer(file16copy)))
if i < fileMagicSize {
assert.Error(t, err, ErrorEncryptedBadMagic.Error())
assert.Nil(t, fh)
} else {
assert.NoError(t, err)
_, err = ioutil.ReadAll(fh)
assert.Error(t, err, ErrorEncryptedFileBadHeader.Error())
}
file16copy[i] ^= 0xFF
}
}
func TestDecrypterClose(t *testing.T) {
c, err := newCipher(NameEncryptionStandard, "", "")
assert.NoError(t, err)
cd := newCloseDetector(bytes.NewBuffer(file16))
fh, err := c.newDecrypter(cd)
assert.NoError(t, err)
assert.Equal(t, 0, cd.closed)
// close before reading
assert.Equal(t, nil, fh.err)
err = fh.Close()
assert.Equal(t, ErrorFileClosed, fh.err)
assert.Equal(t, 1, cd.closed)
// double close
err = fh.Close()
assert.Error(t, err, ErrorFileClosed.Error())
assert.Equal(t, 1, cd.closed)
// try again reading the file this time
cd = newCloseDetector(bytes.NewBuffer(file1))
fh, err = c.newDecrypter(cd)
assert.NoError(t, err)
assert.Equal(t, 0, cd.closed)
// close after reading
out, err := ioutil.ReadAll(fh)
assert.NoError(t, err)
assert.Equal(t, []byte{1}, out)
assert.Equal(t, io.EOF, fh.err)
err = fh.Close()
assert.Equal(t, ErrorFileClosed, fh.err)
assert.Equal(t, 1, cd.closed)
}
func TestPutGetBlock(t *testing.T) {
c, err := newCipher(NameEncryptionStandard, "", "")
assert.NoError(t, err)
block := c.getBlock()
c.putBlock(block)
c.putBlock(block)
assert.Panics(t, func() { c.putBlock(block[:len(block)-1]) })
}
func TestKey(t *testing.T) {
c, err := newCipher(NameEncryptionStandard, "", "")
assert.NoError(t, err)
// Check zero keys OK
assert.Equal(t, [32]byte{}, c.dataKey)
assert.Equal(t, [32]byte{}, c.nameKey)
assert.Equal(t, [16]byte{}, c.nameTweak)
require.NoError(t, c.Key("potato", ""))
assert.Equal(t, [32]byte{0x74, 0x55, 0xC7, 0x1A, 0xB1, 0x7C, 0x86, 0x5B, 0x84, 0x71, 0xF4, 0x7B, 0x79, 0xAC, 0xB0, 0x7E, 0xB3, 0x1D, 0x56, 0x78, 0xB8, 0x0C, 0x7E, 0x2E, 0xAF, 0x4F, 0xC8, 0x06, 0x6A, 0x9E, 0xE4, 0x68}, c.dataKey)
assert.Equal(t, [32]byte{0x76, 0x5D, 0xA2, 0x7A, 0xB1, 0x5D, 0x77, 0xF9, 0x57, 0x96, 0x71, 0x1F, 0x7B, 0x93, 0xAD, 0x63, 0xBB, 0xB4, 0x84, 0x07, 0x2E, 0x71, 0x80, 0xA8, 0xD1, 0x7A, 0x9B, 0xBE, 0xC1, 0x42, 0x70, 0xD0}, c.nameKey)
assert.Equal(t, [16]byte{0xC1, 0x8D, 0x59, 0x32, 0xF5, 0x5B, 0x28, 0x28, 0xC5, 0xE1, 0xE8, 0x72, 0x15, 0x52, 0x03, 0x10}, c.nameTweak)
require.NoError(t, c.Key("Potato", ""))
assert.Equal(t, [32]byte{0xAE, 0xEA, 0x6A, 0xD3, 0x47, 0xDF, 0x75, 0xB9, 0x63, 0xCE, 0x12, 0xF5, 0x76, 0x23, 0xE9, 0x46, 0xD4, 0x2E, 0xD8, 0xBF, 0x3E, 0x92, 0x8B, 0x39, 0x24, 0x37, 0x94, 0x13, 0x3E, 0x5E, 0xF7, 0x5E}, c.dataKey)
assert.Equal(t, [32]byte{0x54, 0xF7, 0x02, 0x6E, 0x8A, 0xFC, 0x56, 0x0A, 0x86, 0x63, 0x6A, 0xAB, 0x2C, 0x9C, 0x51, 0x62, 0xE5, 0x1A, 0x12, 0x23, 0x51, 0x83, 0x6E, 0xAF, 0x50, 0x42, 0x0F, 0x98, 0x1C, 0x86, 0x0A, 0x19}, c.nameKey)
assert.Equal(t, [16]byte{0xF8, 0xC1, 0xB6, 0x27, 0x2D, 0x52, 0x9B, 0x4A, 0x8F, 0xDA, 0xEB, 0x42, 0x4A, 0x28, 0xDD, 0xF3}, c.nameTweak)
require.NoError(t, c.Key("potato", "sausage"))
assert.Equal(t, [32]uint8{0x8e, 0x9b, 0x6b, 0x99, 0xf8, 0x69, 0x4, 0x67, 0xa0, 0x71, 0xf9, 0xcb, 0x92, 0xd0, 0xaa, 0x78, 0x7f, 0x8f, 0xf1, 0x78, 0xbe, 0xc9, 0x6f, 0x99, 0x9f, 0xd5, 0x20, 0x6e, 0x64, 0x4a, 0x1b, 0x50}, c.dataKey)
assert.Equal(t, [32]uint8{0x3e, 0xa9, 0x5e, 0xf6, 0x81, 0x78, 0x2d, 0xc9, 0xd9, 0x95, 0x5d, 0x22, 0x5b, 0xfd, 0x44, 0x2c, 0x6f, 0x5d, 0x68, 0x97, 0xb0, 0x29, 0x1, 0x5c, 0x6f, 0x46, 0x2e, 0x2a, 0x9d, 0xae, 0x2c, 0xe3}, c.nameKey)
assert.Equal(t, [16]uint8{0xf1, 0x7f, 0xd7, 0x14, 0x1d, 0x65, 0x27, 0x4f, 0x36, 0x3f, 0xc2, 0xa0, 0x4d, 0xd2, 0x14, 0x8a}, c.nameTweak)
require.NoError(t, c.Key("potato", "Sausage"))
assert.Equal(t, [32]uint8{0xda, 0x81, 0x8c, 0x67, 0xef, 0x11, 0xf, 0xc8, 0xd5, 0xc8, 0x62, 0x4b, 0x7f, 0xe2, 0x9e, 0x35, 0x35, 0xb0, 0x8d, 0x79, 0x84, 0x89, 0xac, 0xcb, 0xa0, 0xff, 0x2, 0x72, 0x3, 0x1a, 0x5e, 0x64}, c.dataKey)
assert.Equal(t, [32]uint8{0x2, 0x81, 0x7e, 0x7b, 0xea, 0x99, 0x81, 0x5a, 0xd0, 0x2d, 0xb9, 0x64, 0x48, 0xb0, 0x28, 0x27, 0x7c, 0x20, 0xb4, 0xd4, 0xa4, 0x68, 0xad, 0x4e, 0x5c, 0x29, 0xf, 0x79, 0xef, 0xee, 0xdb, 0x3b}, c.nameKey)
assert.Equal(t, [16]uint8{0x9a, 0xb5, 0xb, 0x3d, 0xcb, 0x60, 0x59, 0x55, 0xa5, 0x4d, 0xe6, 0xb6, 0x47, 0x3, 0x23, 0xe2}, c.nameTweak)
require.NoError(t, c.Key("", ""))
assert.Equal(t, [32]byte{}, c.dataKey)
assert.Equal(t, [32]byte{}, c.nameKey)
assert.Equal(t, [16]byte{}, c.nameTweak)
}
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