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
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build go1.20
package wycheproof
import (
"bytes"
"crypto/ecdh"
"fmt"
"testing"
)
func TestECDHStdLib(t *testing.T) {
type ECDHTestVector struct {
// A brief description of the test case
Comment string `json:"comment,omitempty"`
// A list of flags
Flags []string `json:"flags,omitempty"`
// the private key
Private string `json:"private,omitempty"`
// Encoded public key
Public string `json:"public,omitempty"`
// Test result
Result string `json:"result,omitempty"`
// The shared secret key
Shared string `json:"shared,omitempty"`
// Identifier of the test case
TcID int `json:"tcId,omitempty"`
}
type ECDHTestGroup struct {
Curve string `json:"curve,omitempty"`
Tests []*ECDHTestVector `json:"tests,omitempty"`
}
type Root struct {
TestGroups []*ECDHTestGroup `json:"testGroups,omitempty"`
}
flagsShouldPass := map[string]bool{
// We don't support compressed points.
"CompressedPoint": false,
// We don't support decoding custom curves.
"UnnamedCurve": false,
// WrongOrder and UnusedParam are only found with UnnamedCurve.
"WrongOrder": false,
"UnusedParam": false,
// X25519 specific flags
"Twist": true,
"SmallPublicKey": false,
"LowOrderPublic": false,
"ZeroSharedSecret": false,
"NonCanonicalPublic": true,
}
// curveToCurve is a map of all elliptic curves supported
// by crypto/elliptic, which can subsequently be parsed and tested.
curveToCurve := map[string]ecdh.Curve{
"secp256r1": ecdh.P256(),
"secp384r1": ecdh.P384(),
"secp521r1": ecdh.P521(),
"curve25519": ecdh.X25519(),
}
curveToKeySize := map[string]int{
"secp256r1": 32,
"secp384r1": 48,
"secp521r1": 66,
"curve25519": 32,
}
for _, f := range []string{
"ecdh_secp256r1_ecpoint_test.json",
"ecdh_secp384r1_ecpoint_test.json",
"ecdh_secp521r1_ecpoint_test.json",
"x25519_test.json",
} {
var root Root
readTestVector(t, f, &root)
for _, tg := range root.TestGroups {
if _, ok := curveToCurve[tg.Curve]; !ok {
continue
}
for _, tt := range tg.Tests {
tg, tt := tg, tt
t.Run(fmt.Sprintf("%s/%d", tg.Curve, tt.TcID), func(t *testing.T) {
t.Logf("Type: %v", tt.Result)
t.Logf("Flags: %q", tt.Flags)
t.Log(tt.Comment)
shouldPass := shouldPass(tt.Result, tt.Flags, flagsShouldPass)
curve := curveToCurve[tg.Curve]
p := decodeHex(tt.Public)
pub, err := curve.NewPublicKey(p)
if err != nil {
if shouldPass {
t.Errorf("NewPublicKey: %v", err)
}
return
}
privBytes := decodeHex(tt.Private)
if len(privBytes) != curveToKeySize[tg.Curve] {
t.Skipf("non-standard key size %d", len(privBytes))
}
priv, err := curve.NewPrivateKey(privBytes)
if err != nil {
if shouldPass {
t.Errorf("NewPrivateKey: %v", err)
}
return
}
shared := decodeHex(tt.Shared)
x, err := priv.ECDH(pub)
if err != nil {
if tg.Curve == "curve25519" && !shouldPass {
// ECDH is expected to only return an error when using X25519,
// in all other cases an error is unexpected.
return
}
t.Fatalf("ECDH: %v", err)
}
if bytes.Equal(shared, x) != shouldPass {
if shouldPass {
t.Errorf("ECDH = %x, want %x", shared, x)
} else {
t.Errorf("ECDH = %x, want anything else", shared)
}
}
})
}
}
}
}
|
