1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
package main
import (
"bytes"
"encoding/hex"
"testing"
)
// See draft-irtf-cfrg-chacha20-poly1305-10, section 2.1.1.
func TestChaChaQuarterRound(t *testing.T) {
state := [16]uint32{0x11111111, 0x01020304, 0x9b8d6f43, 0x01234567}
chaChaQuarterRound(&state, 0, 1, 2, 3)
a, b, c, d := state[0], state[1], state[2], state[3]
if a != 0xea2a92f4 || b != 0xcb1cf8ce || c != 0x4581472e || d != 0x5881c4bb {
t.Errorf("Incorrect results: %x", state)
}
}
// See draft-irtf-cfrg-chacha20-poly1305-10, section 2.2.1.
func TestChaChaQuarterRoundState(t *testing.T) {
state := [16]uint32{
0x879531e0, 0xc5ecf37d, 0x516461b1, 0xc9a62f8a,
0x44c20ef3, 0x3390af7f, 0xd9fc690b, 0x2a5f714c,
0x53372767, 0xb00a5631, 0x974c541a, 0x359e9963,
0x5c971061, 0x3d631689, 0x2098d9d6, 0x91dbd320,
}
chaChaQuarterRound(&state, 2, 7, 8, 13)
expected := [16]uint32{
0x879531e0, 0xc5ecf37d, 0xbdb886dc, 0xc9a62f8a,
0x44c20ef3, 0x3390af7f, 0xd9fc690b, 0xcfacafd2,
0xe46bea80, 0xb00a5631, 0x974c541a, 0x359e9963,
0x5c971061, 0xccc07c79, 0x2098d9d6, 0x91dbd320,
}
for i := range state {
if state[i] != expected[i] {
t.Errorf("Mismatch at %d: %x vs %x", i, state, expected)
}
}
}
// See draft-irtf-cfrg-chacha20-poly1305-10, section 2.3.2.
func TestChaCha20Block(t *testing.T) {
state := [16]uint32{
0x61707865, 0x3320646e, 0x79622d32, 0x6b206574,
0x03020100, 0x07060504, 0x0b0a0908, 0x0f0e0d0c,
0x13121110, 0x17161514, 0x1b1a1918, 0x1f1e1d1c,
0x00000001, 0x09000000, 0x4a000000, 0x00000000,
}
out := make([]byte, 64)
chaCha20Block(&state, out)
expected := []byte{
0x10, 0xf1, 0xe7, 0xe4, 0xd1, 0x3b, 0x59, 0x15,
0x50, 0x0f, 0xdd, 0x1f, 0xa3, 0x20, 0x71, 0xc4,
0xc7, 0xd1, 0xf4, 0xc7, 0x33, 0xc0, 0x68, 0x03,
0x04, 0x22, 0xaa, 0x9a, 0xc3, 0xd4, 0x6c, 0x4e,
0xd2, 0x82, 0x64, 0x46, 0x07, 0x9f, 0xaa, 0x09,
0x14, 0xc2, 0xd7, 0x05, 0xd9, 0x8b, 0x02, 0xa2,
0xb5, 0x12, 0x9c, 0xd1, 0xde, 0x16, 0x4e, 0xb9,
0xcb, 0xd0, 0x83, 0xe8, 0xa2, 0x50, 0x3c, 0x4e,
}
if !bytes.Equal(out, expected) {
t.Errorf("Got %x, wanted %x", out, expected)
}
}
// See draft-agl-tls-chacha20poly1305-04, section 7.
func TestChaCha20Poly1305(t *testing.T) {
key, _ := hex.DecodeString("4290bcb154173531f314af57f3be3b5006da371ece272afa1b5dbdd1100a1007")
input, _ := hex.DecodeString("86d09974840bded2a5ca")
nonce, _ := hex.DecodeString("cd7cf67be39c794a")
ad, _ := hex.DecodeString("87e229d4500845a079c0")
output, _ := hex.DecodeString("e3e446f7ede9a19b62a4677dabf4e3d24b876bb284753896e1d6")
aead, err := newChaCha20Poly1305(key)
if err != nil {
t.Fatal(err)
}
out, err := aead.Open(nil, nonce, output, ad)
if err != nil {
t.Errorf("Open failed: %s", err)
} else if !bytes.Equal(out, input) {
t.Errorf("Open gave %x, wanted %x", out, input)
}
out = aead.Seal(nil, nonce, input, ad)
if !bytes.Equal(out, output) {
t.Errorf("Open gave %x, wanted %x", out, output)
}
out[0]++
_, err = aead.Open(nil, nonce, out, ad)
if err == nil {
t.Errorf("Open on malformed data unexpectedly succeeded")
}
}
|
