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
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
/*-
* Copyright 2014 Square Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package josecipher
import (
"bytes"
"crypto/ecdsa"
"crypto/elliptic"
"encoding/base64"
"math/big"
"testing"
)
// Example keys from JWA, Appendix C
var aliceKey = &ecdsa.PrivateKey{
PublicKey: ecdsa.PublicKey{
Curve: elliptic.P256(),
X: fromBase64Int("gI0GAILBdu7T53akrFmMyGcsF3n5dO7MmwNBHKW5SV0="),
Y: fromBase64Int("SLW_xSffzlPWrHEVI30DHM_4egVwt3NQqeUD7nMFpps="),
},
D: fromBase64Int("0_NxaRPUMQoAJt50Gz8YiTr8gRTwyEaCumd-MToTmIo="),
}
var bobKey = &ecdsa.PrivateKey{
PublicKey: ecdsa.PublicKey{
Curve: elliptic.P256(),
X: fromBase64Int("weNJy2HscCSM6AEDTDg04biOvhFhyyWvOHQfeF_PxMQ="),
Y: fromBase64Int("e8lnCO-AlStT-NJVX-crhB7QRYhiix03illJOVAOyck="),
},
D: fromBase64Int("VEmDZpDXXK8p8N0Cndsxs924q6nS1RXFASRl6BfUqdw="),
}
// Build big int from base64-encoded string. Strips whitespace (for testing).
func fromBase64Int(data string) *big.Int {
val, err := base64.URLEncoding.DecodeString(data)
if err != nil {
panic("Invalid test data")
}
return new(big.Int).SetBytes(val)
}
func TestVectorECDHES(t *testing.T) {
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 := DeriveECDHES("A128GCM", apuData, apvData, bobKey, &aliceKey.PublicKey, 16)
if bytes.Compare(output, expected) != 0 {
t.Error("output did not match what we expect, got", output, "wanted", expected)
}
}
func TestInvalidECPublicKey(t *testing.T) {
defer func() { recover() }()
// Invalid key
invalid := &ecdsa.PrivateKey{
PublicKey: ecdsa.PublicKey{
Curve: elliptic.P256(),
X: fromBase64Int("MTEx"),
Y: fromBase64Int("MTEx"),
},
D: fromBase64Int("0_NxaRPUMQoAJt50Gz8YiTr8gRTwyEaCumd-MToTmIo="),
}
DeriveECDHES("A128GCM", []byte{}, []byte{}, bobKey, &invalid.PublicKey, 16)
t.Fatal("should panic if public key was invalid")
}
func BenchmarkECDHES_128(b *testing.B) {
apuData := []byte("APU")
apvData := []byte("APV")
b.ResetTimer()
for i := 0; i < b.N; i++ {
DeriveECDHES("ID", apuData, apvData, bobKey, &aliceKey.PublicKey, 16)
}
}
func BenchmarkECDHES_192(b *testing.B) {
apuData := []byte("APU")
apvData := []byte("APV")
b.ResetTimer()
for i := 0; i < b.N; i++ {
DeriveECDHES("ID", apuData, apvData, bobKey, &aliceKey.PublicKey, 24)
}
}
func BenchmarkECDHES_256(b *testing.B) {
apuData := []byte("APU")
apvData := []byte("APV")
b.ResetTimer()
for i := 0; i < b.N; i++ {
DeriveECDHES("ID", apuData, apvData, bobKey, &aliceKey.PublicKey, 32)
}
}
|
