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4.3 KiB

package xchacha20poly1305
import (
"bytes"
"encoding/hex"
"testing"
"github.com/stretchr/testify/require"
)
func toHex(bits []byte) string {
return hex.EncodeToString(bits)
}
func fromHex(bits string) ([]byte, error) {
b, err := hex.DecodeString(bits)
if err != nil {
return nil, err
}
return b, nil
}
func check(t *testing.T, fn func(string) ([]byte, error), hex string) []byte {
t.Helper()
res, err := fn(hex)
require.NoError(t, err)
return res
}
func TestHChaCha20(t *testing.T) {
var hChaCha20Vectors = []struct {
key, nonce, keystream []byte
}{
{
check(t, fromHex, "0000000000000000000000000000000000000000000000000000000000000000"),
check(t, fromHex, "000000000000000000000000000000000000000000000000"),
check(t, fromHex, "1140704c328d1d5d0e30086cdf209dbd6a43b8f41518a11cc387b669b2ee6586"),
},
{
check(t, fromHex, "8000000000000000000000000000000000000000000000000000000000000000"),
check(t, fromHex, "000000000000000000000000000000000000000000000000"),
check(t, fromHex, "7d266a7fd808cae4c02a0a70dcbfbcc250dae65ce3eae7fc210f54cc8f77df86"),
},
{
check(t, fromHex, "0000000000000000000000000000000000000000000000000000000000000001"),
check(t, fromHex, "000000000000000000000000000000000000000000000002"),
check(t, fromHex, "e0c77ff931bb9163a5460c02ac281c2b53d792b1c43fea817e9ad275ae546963"),
},
{
check(t, fromHex, "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f"),
check(t, fromHex, "000102030405060708090a0b0c0d0e0f1011121314151617"),
check(t, fromHex, "51e3ff45a895675c4b33b46c64f4a9ace110d34df6a2ceab486372bacbd3eff6"),
},
{
check(t, fromHex, "24f11cce8a1b3d61e441561a696c1c1b7e173d084fd4812425435a8896a013dc"),
check(t, fromHex, "d9660c5900ae19ddad28d6e06e45fe5e"),
check(t, fromHex, "5966b3eec3bff1189f831f06afe4d4e3be97fa9235ec8c20d08acfbbb4e851e3"),
},
}
for i, v := range hChaCha20Vectors {
var key [32]byte
var nonce [16]byte
copy(key[:], v.key)
copy(nonce[:], v.nonce)
HChaCha20(&key, &nonce, &key)
if !bytes.Equal(key[:], v.keystream) {
t.Errorf("test %d: keystream mismatch:\n \t got: %s\n \t want: %s", i, toHex(key[:]), toHex(v.keystream))
}
}
}
func TestVectors(t *testing.T) {
for i, v := range vectors {
if len(v.plaintext) == 0 {
v.plaintext = make([]byte, len(v.ciphertext))
}
var nonce [24]byte
copy(nonce[:], v.nonce)
aead, err := New(v.key)
if err != nil {
t.Error(err)
}
dst := aead.Seal(nil, nonce[:], v.plaintext, v.ad)
if !bytes.Equal(dst, v.ciphertext) {
t.Errorf("test %d: ciphertext mismatch:\n \t got: %s\n \t want: %s", i, toHex(dst), toHex(v.ciphertext))
}
open, err := aead.Open(nil, nonce[:], dst, v.ad)
if err != nil {
t.Error(err)
}
if !bytes.Equal(open, v.plaintext) {
t.Errorf("test %d: plaintext mismatch:\n \t got: %s\n \t want: %s", i, string(open), string(v.plaintext))
}
}
}
var vectors = []struct {
key, nonce, ad, plaintext, ciphertext []byte
}{
{
[]byte{
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a,
0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95,
0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
},
[]byte{0x07, 0x00, 0x00, 0x00, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b},
[]byte{0x50, 0x51, 0x52, 0x53, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7},
[]byte(
"Ladies and Gentlemen of the class of '99: If I could offer you only one tip for the future, sunscreen would be it.",
),
[]byte{
0x45, 0x3c, 0x06, 0x93, 0xa7, 0x40, 0x7f, 0x04, 0xff, 0x4c, 0x56,
0xae, 0xdb, 0x17, 0xa3, 0xc0, 0xa1, 0xaf, 0xff, 0x01, 0x17, 0x49,
0x30, 0xfc, 0x22, 0x28, 0x7c, 0x33, 0xdb, 0xcf, 0x0a, 0xc8, 0xb8,
0x9a, 0xd9, 0x29, 0x53, 0x0a, 0x1b, 0xb3, 0xab, 0x5e, 0x69, 0xf2,
0x4c, 0x7f, 0x60, 0x70, 0xc8, 0xf8, 0x40, 0xc9, 0xab, 0xb4, 0xf6,
0x9f, 0xbf, 0xc8, 0xa7, 0xff, 0x51, 0x26, 0xfa, 0xee, 0xbb, 0xb5,
0x58, 0x05, 0xee, 0x9c, 0x1c, 0xf2, 0xce, 0x5a, 0x57, 0x26, 0x32,
0x87, 0xae, 0xc5, 0x78, 0x0f, 0x04, 0xec, 0x32, 0x4c, 0x35, 0x14,
0x12, 0x2c, 0xfc, 0x32, 0x31, 0xfc, 0x1a, 0x8b, 0x71, 0x8a, 0x62,
0x86, 0x37, 0x30, 0xa2, 0x70, 0x2b, 0xb7, 0x63, 0x66, 0x11, 0x6b,
0xed, 0x09, 0xe0, 0xfd, 0x5c, 0x6d, 0x84, 0xb6, 0xb0, 0xc1, 0xab,
0xaf, 0x24, 0x9d, 0x5d, 0xd0, 0xf7, 0xf5, 0xa7, 0xea,
},
},
}