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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
// Copyright 2017 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.
package qtls
import (
"crypto"
"testing"
)
func TestSignatureSelection(t *testing.T) {
rsaCert := &Certificate{
Certificate: [][]byte{testRSACertificate},
PrivateKey: testRSAPrivateKey,
}
pkcs1Cert := &Certificate{
Certificate: [][]byte{testRSACertificate},
PrivateKey: testRSAPrivateKey,
SupportedSignatureAlgorithms: []SignatureScheme{PKCS1WithSHA1, PKCS1WithSHA256},
}
ecdsaCert := &Certificate{
Certificate: [][]byte{testP256Certificate},
PrivateKey: testP256PrivateKey,
}
ed25519Cert := &Certificate{
Certificate: [][]byte{testEd25519Certificate},
PrivateKey: testEd25519PrivateKey,
}
tests := []struct {
cert *Certificate
peerSigAlgs []SignatureScheme
tlsVersion uint16
expectedSigAlg SignatureScheme
expectedSigType uint8
expectedHash crypto.Hash
}{
{rsaCert, []SignatureScheme{PKCS1WithSHA1, PKCS1WithSHA256}, VersionTLS12, PKCS1WithSHA1, signaturePKCS1v15, crypto.SHA1},
{rsaCert, []SignatureScheme{PKCS1WithSHA512, PKCS1WithSHA1}, VersionTLS12, PKCS1WithSHA512, signaturePKCS1v15, crypto.SHA512},
{rsaCert, []SignatureScheme{PSSWithSHA256, PKCS1WithSHA256}, VersionTLS12, PSSWithSHA256, signatureRSAPSS, crypto.SHA256},
{pkcs1Cert, []SignatureScheme{PSSWithSHA256, PKCS1WithSHA256}, VersionTLS12, PKCS1WithSHA256, signaturePKCS1v15, crypto.SHA256},
{rsaCert, []SignatureScheme{PSSWithSHA384, PKCS1WithSHA1}, VersionTLS13, PSSWithSHA384, signatureRSAPSS, crypto.SHA384},
{ecdsaCert, []SignatureScheme{ECDSAWithSHA1}, VersionTLS12, ECDSAWithSHA1, signatureECDSA, crypto.SHA1},
{ecdsaCert, []SignatureScheme{ECDSAWithP256AndSHA256}, VersionTLS12, ECDSAWithP256AndSHA256, signatureECDSA, crypto.SHA256},
{ecdsaCert, []SignatureScheme{ECDSAWithP256AndSHA256}, VersionTLS13, ECDSAWithP256AndSHA256, signatureECDSA, crypto.SHA256},
{ed25519Cert, []SignatureScheme{Ed25519}, VersionTLS12, Ed25519, signatureEd25519, directSigning},
{ed25519Cert, []SignatureScheme{Ed25519}, VersionTLS13, Ed25519, signatureEd25519, directSigning},
// TLS 1.2 without signature_algorithms extension
{rsaCert, nil, VersionTLS12, PKCS1WithSHA1, signaturePKCS1v15, crypto.SHA1},
{ecdsaCert, nil, VersionTLS12, ECDSAWithSHA1, signatureECDSA, crypto.SHA1},
// TLS 1.2 does not restrict the ECDSA curve (our ecdsaCert is P-256)
{ecdsaCert, []SignatureScheme{ECDSAWithP384AndSHA384}, VersionTLS12, ECDSAWithP384AndSHA384, signatureECDSA, crypto.SHA384},
}
for testNo, test := range tests {
sigAlg, err := selectSignatureScheme(test.tlsVersion, test.cert, test.peerSigAlgs)
if err != nil {
t.Errorf("test[%d]: unexpected selectSignatureScheme error: %v", testNo, err)
}
if test.expectedSigAlg != sigAlg {
t.Errorf("test[%d]: expected signature scheme %v, got %v", testNo, test.expectedSigAlg, sigAlg)
}
sigType, hashFunc, err := typeAndHashFromSignatureScheme(sigAlg)
if err != nil {
t.Errorf("test[%d]: unexpected typeAndHashFromSignatureScheme error: %v", testNo, err)
}
if test.expectedSigType != sigType {
t.Errorf("test[%d]: expected signature algorithm %#x, got %#x", testNo, test.expectedSigType, sigType)
}
if test.expectedHash != hashFunc {
t.Errorf("test[%d]: expected hash function %#x, got %#x", testNo, test.expectedHash, hashFunc)
}
}
brokenCert := &Certificate{
Certificate: [][]byte{testRSACertificate},
PrivateKey: testRSAPrivateKey,
SupportedSignatureAlgorithms: []SignatureScheme{Ed25519},
}
badTests := []struct {
cert *Certificate
peerSigAlgs []SignatureScheme
tlsVersion uint16
}{
{rsaCert, []SignatureScheme{ECDSAWithP256AndSHA256, ECDSAWithSHA1}, VersionTLS12},
{ecdsaCert, []SignatureScheme{PKCS1WithSHA256, PKCS1WithSHA1}, VersionTLS12},
{rsaCert, []SignatureScheme{0}, VersionTLS12},
{ed25519Cert, []SignatureScheme{ECDSAWithP256AndSHA256, ECDSAWithSHA1}, VersionTLS12},
{ecdsaCert, []SignatureScheme{Ed25519}, VersionTLS12},
{brokenCert, []SignatureScheme{Ed25519}, VersionTLS12},
{brokenCert, []SignatureScheme{PKCS1WithSHA256}, VersionTLS12},
// RFC 5246, Section 7.4.1.4.1, says to only consider {sha1,ecdsa} as
// default when the extension is missing, and RFC 8422 does not update
// it. Anyway, if a stack supports Ed25519 it better support sigalgs.
{ed25519Cert, nil, VersionTLS12},
// TLS 1.3 has no default signature_algorithms.
{rsaCert, nil, VersionTLS13},
{ecdsaCert, nil, VersionTLS13},
{ed25519Cert, nil, VersionTLS13},
// Wrong curve, which TLS 1.3 checks
{ecdsaCert, []SignatureScheme{ECDSAWithP384AndSHA384}, VersionTLS13},
// TLS 1.3 does not support PKCS1v1.5 or SHA-1.
{rsaCert, []SignatureScheme{PKCS1WithSHA256}, VersionTLS13},
{pkcs1Cert, []SignatureScheme{PSSWithSHA256, PKCS1WithSHA256}, VersionTLS13},
{ecdsaCert, []SignatureScheme{ECDSAWithSHA1}, VersionTLS13},
// The key can be too small for the hash.
{rsaCert, []SignatureScheme{PSSWithSHA512}, VersionTLS12},
}
for testNo, test := range badTests {
sigAlg, err := selectSignatureScheme(test.tlsVersion, test.cert, test.peerSigAlgs)
if err == nil {
t.Errorf("test[%d]: unexpected success, got %v", testNo, sigAlg)
}
}
}
func TestLegacyTypeAndHash(t *testing.T) {
sigType, hashFunc, err := legacyTypeAndHashFromPublicKey(testRSAPrivateKey.Public())
if err != nil {
t.Errorf("RSA: unexpected error: %v", err)
}
if expectedSigType := signaturePKCS1v15; expectedSigType != sigType {
t.Errorf("RSA: expected signature type %#x, got %#x", expectedSigType, sigType)
}
if expectedHashFunc := crypto.MD5SHA1; expectedHashFunc != hashFunc {
t.Errorf("RSA: expected hash %#x, got %#x", expectedHashFunc, hashFunc)
}
sigType, hashFunc, err = legacyTypeAndHashFromPublicKey(testECDSAPrivateKey.Public())
if err != nil {
t.Errorf("ECDSA: unexpected error: %v", err)
}
if expectedSigType := signatureECDSA; expectedSigType != sigType {
t.Errorf("ECDSA: expected signature type %#x, got %#x", expectedSigType, sigType)
}
if expectedHashFunc := crypto.SHA1; expectedHashFunc != hashFunc {
t.Errorf("ECDSA: expected hash %#x, got %#x", expectedHashFunc, hashFunc)
}
// Ed25519 is not supported by TLS 1.0 and 1.1.
_, _, err = legacyTypeAndHashFromPublicKey(testEd25519PrivateKey.Public())
if err == nil {
t.Errorf("Ed25519: unexpected success")
}
}
// TestSupportedSignatureAlgorithms checks that all supportedSignatureAlgorithms
// have valid type and hash information.
func TestSupportedSignatureAlgorithms(t *testing.T) {
for _, sigAlg := range supportedSignatureAlgorithms {
sigType, hash, err := typeAndHashFromSignatureScheme(sigAlg)
if err != nil {
t.Errorf("%v: unexpected error: %v", sigAlg, err)
}
if sigType == 0 {
t.Errorf("%v: missing signature type", sigAlg)
}
if hash == 0 && sigAlg != Ed25519 {
t.Errorf("%v: missing hash", sigAlg)
}
}
}
|
