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package keyenc_test
import (
"bytes"
"crypto/aes"
"crypto/ecdsa"
"encoding/hex"
"testing"
"github.com/lestrrat-go/jwx/v2/jwe/internal/keyenc"
"github.com/lestrrat-go/jwx/v2/jwk"
"github.com/stretchr/testify/assert"
)
func mustHexDecode(s string) []byte {
b, err := hex.DecodeString(s)
if err != nil {
panic(err)
}
return b
}
type vector struct {
Kek string
Data string
Expected string
}
func TestRFC3394_Wrap(t *testing.T) {
vectors := []vector{
{
Kek: "000102030405060708090A0B0C0D0E0F",
Data: "00112233445566778899AABBCCDDEEFF",
Expected: "1FA68B0A8112B447AEF34BD8FB5A7B829D3E862371D2CFE5",
},
{
Kek: "000102030405060708090A0B0C0D0E0F1011121314151617",
Data: "00112233445566778899AABBCCDDEEFF",
Expected: "96778B25AE6CA435F92B5B97C050AED2468AB8A17AD84E5D",
},
{
Kek: "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F",
Data: "00112233445566778899AABBCCDDEEFF0001020304050607",
Expected: "A8F9BC1612C68B3FF6E6F4FBE30E71E4769C8B80A32CB8958CD5D17D6B254DA1",
},
}
for _, v := range vectors {
t.Logf("kek = %s", v.Kek)
t.Logf("data = %s", v.Data)
t.Logf("expected = %s", v.Expected)
kek := mustHexDecode(v.Kek)
data := mustHexDecode(v.Data)
expected := mustHexDecode(v.Expected)
block, err := aes.NewCipher(kek)
if !assert.NoError(t, err, "NewCipher is successful") {
return
}
out, err := keyenc.Wrap(block, data)
if !assert.NoError(t, err, "Wrap is successful") {
return
}
if !assert.Equal(t, expected, out, "Wrap generates expected output") {
return
}
unwrapped, err := keyenc.Unwrap(block, out)
if !assert.NoError(t, err, "Unwrap is successful") {
return
}
if !assert.Equal(t, data, unwrapped, "Unwrapped data matches") {
return
}
}
}
func TestDeriveECDHES(t *testing.T) {
// stolen from go-jose
// Example keys from JWA, Appendix C
var aliceKey ecdsa.PrivateKey
var bobKey ecdsa.PrivateKey
const aliceKeySrc = `{"kty":"EC",
"crv":"P-256",
"x":"gI0GAILBdu7T53akrFmMyGcsF3n5dO7MmwNBHKW5SV0",
"y":"SLW_xSffzlPWrHEVI30DHM_4egVwt3NQqeUD7nMFpps",
"d":"0_NxaRPUMQoAJt50Gz8YiTr8gRTwyEaCumd-MToTmIo"
}`
const bobKeySrc = `{"kty":"EC",
"crv":"P-256",
"x":"weNJy2HscCSM6AEDTDg04biOvhFhyyWvOHQfeF_PxMQ",
"y":"e8lnCO-AlStT-NJVX-crhB7QRYhiix03illJOVAOyck",
"d":"VEmDZpDXXK8p8N0Cndsxs924q6nS1RXFASRl6BfUqdw"
}`
aliceWebKey, err := jwk.ParseKey([]byte(aliceKeySrc))
if !assert.NoError(t, err, `jwk.ParseKey should succeed`) {
return
}
if !assert.NoError(t, aliceWebKey.Raw(&aliceKey), `aliceWebKey.Raw should succeed`) {
return
}
bobWebKey, err := jwk.ParseKey([]byte(bobKeySrc))
if !assert.NoError(t, err, `jwk.ParseKey should succeed`) {
return
}
if !assert.NoError(t, bobWebKey.Raw(&bobKey), `bobWebKey.Raw should succeed`) {
return
}
apuData := []byte("Alice")
apvData := []byte("Bob")
expected := []byte{86, 170, 141, 234, 248, 35, 109, 32, 92, 34, 40, 205, 113, 167, 16, 26}
output, err := keyenc.DeriveECDHES([]byte("A128GCM"), apuData, apvData, &bobKey, &aliceKey.PublicKey, 16)
if !assert.NoError(t, err, `keyenc.DeriveECDHES should succeed`) {
return
}
if !assert.Equal(t, output, expected, `result should match`) {
return
}
}
func TestKeyWrap(t *testing.T) {
// stolen from go-jose
// Test vectors from: http://csrc.nist.gov/groups/ST/toolkit/documents/kms/key-wrap.pdf
kek0, _ := hex.DecodeString("000102030405060708090A0B0C0D0E0F")
cek0, _ := hex.DecodeString("00112233445566778899AABBCCDDEEFF")
expected0, _ := hex.DecodeString("1FA68B0A8112B447AEF34BD8FB5A7B829D3E862371D2CFE5")
kek1, _ := hex.DecodeString("000102030405060708090A0B0C0D0E0F1011121314151617")
cek1, _ := hex.DecodeString("00112233445566778899AABBCCDDEEFF")
expected1, _ := hex.DecodeString("96778B25AE6CA435F92B5B97C050AED2468AB8A17AD84E5D")
kek2, _ := hex.DecodeString("000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F")
cek2, _ := hex.DecodeString("00112233445566778899AABBCCDDEEFF0001020304050607")
expected2, _ := hex.DecodeString("A8F9BC1612C68B3FF6E6F4FBE30E71E4769C8B80A32CB8958CD5D17D6B254DA1")
block0, _ := aes.NewCipher(kek0)
block1, _ := aes.NewCipher(kek1)
block2, _ := aes.NewCipher(kek2)
out0, _ := keyenc.Wrap(block0, cek0)
out1, _ := keyenc.Wrap(block1, cek1)
out2, _ := keyenc.Wrap(block2, cek2)
if !bytes.Equal(out0, expected0) {
t.Error("output 0 not as expected, got", out0, "wanted", expected0)
}
if !bytes.Equal(out1, expected1) {
t.Error("output 1 not as expected, got", out1, "wanted", expected1)
}
if !bytes.Equal(out2, expected2) {
t.Error("output 2 not as expected, got", out2, "wanted", expected2)
}
unwrap0, _ := keyenc.Unwrap(block0, out0)
unwrap1, _ := keyenc.Unwrap(block1, out1)
unwrap2, _ := keyenc.Unwrap(block2, out2)
if !bytes.Equal(unwrap0, cek0) {
t.Error("key unwrap did not return original input, got", unwrap0, "wanted", cek0)
}
if !bytes.Equal(unwrap1, cek1) {
t.Error("key unwrap did not return original input, got", unwrap1, "wanted", cek1)
}
if !bytes.Equal(unwrap2, cek2) {
t.Error("key unwrap did not return original input, got", unwrap2, "wanted", cek2)
}
}
|
