Line data Source code
1 : /*
2 : *
3 : * Copyright (c) 2021-2022 Project CHIP Authors
4 : *
5 : * Licensed under the Apache License, Version 2.0 (the "License");
6 : * you may not use this file except in compliance with the License.
7 : * You may obtain a copy of the License at
8 : *
9 : * http://www.apache.org/licenses/LICENSE-2.0
10 : *
11 : * Unless required by applicable law or agreed to in writing, software
12 : * distributed under the License is distributed on an "AS IS" BASIS,
13 : * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 : * See the License for the specific language governing permissions and
15 : * limitations under the License.
16 : */
17 : #include "DefaultDeviceAttestationVerifier.h"
18 :
19 : #include <controller/OperationalCredentialsDelegate.h>
20 : #include <credentials/CHIPCert.h>
21 : #include <credentials/CertificationDeclaration.h>
22 : #include <credentials/DeviceAttestationConstructor.h>
23 : #include <credentials/DeviceAttestationVendorReserved.h>
24 : #include <credentials/attestation_verifier/TestPAAStore.h>
25 : #include <crypto/CHIPCryptoPAL.h>
26 :
27 : #include <lib/core/CHIPError.h>
28 : #include <lib/core/Global.h>
29 : #include <lib/support/CodeUtils.h>
30 : #include <lib/support/ScopedBuffer.h>
31 : #include <lib/support/Span.h>
32 : #include <lib/support/StringBuilder.h>
33 : #include <lib/support/logging/CHIPLogging.h>
34 :
35 : using namespace chip::Crypto;
36 : using chip::TestCerts::GetTestPaaRootStore;
37 :
38 : namespace chip {
39 : namespace Credentials {
40 :
41 : namespace {
42 :
43 : // As per specifications section 11.22.5.1. Constant RESP_MAX
44 : constexpr size_t kMaxResponseLength = 900;
45 :
46 : // Test CD Signing Key from `credentials/test/certification-declaration/Chip-Test-CD-Signing-Cert.pem`
47 : // used to verify any in-SDK development CDs. The associated keypair to do actual signing is in
48 : // `credentials/test/certification-declaration/Chip-Test-CD-Signing-Key.pem`.
49 : //
50 : // Note that this certificate is a self signed certificate and doesn't chain up to the CSA trusted root.
51 : // This CD Signing certificate can only be used to sign CDs for testing/development purposes
52 : // and should never be used in production devices.
53 : //
54 : // -----BEGIN CERTIFICATE-----
55 : // MIIBszCCAVqgAwIBAgIIRdrzneR6oI8wCgYIKoZIzj0EAwIwKzEpMCcGA1UEAwwg
56 : // TWF0dGVyIFRlc3QgQ0QgU2lnbmluZyBBdXRob3JpdHkwIBcNMjEwNjI4MTQyMzQz
57 : // WhgPOTk5OTEyMzEyMzU5NTlaMCsxKTAnBgNVBAMMIE1hdHRlciBUZXN0IENEIFNp
58 : // Z25pbmcgQXV0aG9yaXR5MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEPDmJIkUr
59 : // VcrzicJb0bykZWlSzLkOiGkkmthHRlMBTL+V1oeWXgNrUhxRA35rjO3vyh60QEZp
60 : // T6CIgu7WUZ3suqNmMGQwEgYDVR0TAQH/BAgwBgEB/wIBATAOBgNVHQ8BAf8EBAMC
61 : // AQYwHQYDVR0OBBYEFGL6gjNZrPqplj4c+hQK3fUE83FgMB8GA1UdIwQYMBaAFGL6
62 : // gjNZrPqplj4c+hQK3fUE83FgMAoGCCqGSM49BAMCA0cAMEQCICxUXOTkV9im8NnZ
63 : // u+vW7OHd/n+MbZps83UyH8b6xxOEAiBUB3jodDlyUn7t669YaGIgtUB48s1OYqdq
64 : // 58u5L/VMiw==
65 : // -----END CERTIFICATE-----
66 : //
67 : constexpr uint8_t gTestCdPubkeyBytes[] = {
68 : 0x04, 0x3c, 0x39, 0x89, 0x22, 0x45, 0x2b, 0x55, 0xca, 0xf3, 0x89, 0xc2, 0x5b, 0xd1, 0xbc, 0xa4, 0x65,
69 : 0x69, 0x52, 0xcc, 0xb9, 0x0e, 0x88, 0x69, 0x24, 0x9a, 0xd8, 0x47, 0x46, 0x53, 0x01, 0x4c, 0xbf, 0x95,
70 : 0xd6, 0x87, 0x96, 0x5e, 0x03, 0x6b, 0x52, 0x1c, 0x51, 0x03, 0x7e, 0x6b, 0x8c, 0xed, 0xef, 0xca, 0x1e,
71 : 0xb4, 0x40, 0x46, 0x69, 0x4f, 0xa0, 0x88, 0x82, 0xee, 0xd6, 0x51, 0x9d, 0xec, 0xba,
72 : };
73 :
74 : constexpr uint8_t gTestCdPubkeyKid[] = {
75 : 0x62, 0xfa, 0x82, 0x33, 0x59, 0xac, 0xfa, 0xa9, 0x96, 0x3e, 0x1c, 0xfa, 0x14, 0x0a, 0xdd, 0xf5, 0x04, 0xf3, 0x71, 0x60,
76 : };
77 :
78 : // Official CSA "Matter Certification and Testing CA"
79 : //
80 : // -----BEGIN CERTIFICATE-----
81 : // MIICATCCAaegAwIBAgIHY3Nhcm9vdDAKBggqhkjOPQQDAjBSMQwwCgYDVQQKDAND
82 : // U0ExLDAqBgNVBAMMI01hdHRlciBDZXJ0aWZpY2F0aW9uIGFuZCBUZXN0aW5nIENB
83 : // MRQwEgYKKwYBBAGConwCAQwEQzVBMDAgFw0yMjA3MDcxOTI4MDRaGA8yMTIyMDYx
84 : // MzE5MjgwNFowUjEMMAoGA1UECgwDQ1NBMSwwKgYDVQQDDCNNYXR0ZXIgQ2VydGlm
85 : // aWNhdGlvbiBhbmQgVGVzdGluZyBDQTEUMBIGCisGAQQBgqJ8AgEMBEM1QTAwWTAT
86 : // BgcqhkjOPQIBBggqhkjOPQMBBwNCAAQ4SjrDql2+y3IP5iEdPK1IYm/3EaCkkp+t
87 : // 2GD44nf/wN4fPrYzejSEe1o6BW6ocQ6Td+7t7iUXA/3ZNQEly45Io2YwZDASBgNV
88 : // HRMBAf8ECDAGAQH/AgEBMA4GA1UdDwEB/wQEAwIBBjAdBgNVHQ4EFgQUl+Rp0MUE
89 : // FMJvxwH3fpR3OQmN9qUwHwYDVR0jBBgwFoAUl+Rp0MUEFMJvxwH3fpR3OQmN9qUw
90 : // CgYIKoZIzj0EAwIDSAAwRQIgearlB0fCJ49UoJ6xwKPdlPEopCOL9jVCviODEleI
91 : // +mQCIQDvvDCKi7kvj4R4BoFS4BVZGCk4zJ84W4tfTTfu89lRbQ==
92 : // -----END CERTIFICATE-----
93 : //
94 : constexpr uint8_t gCdRootCert[] = {
95 : 0x30, 0x82, 0x02, 0x01, 0x30, 0x82, 0x01, 0xa7, 0xa0, 0x03, 0x02, 0x01, 0x02, 0x02, 0x07, 0x63, 0x73, 0x61, 0x72, 0x6f, 0x6f,
96 : 0x74, 0x30, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x04, 0x03, 0x02, 0x30, 0x52, 0x31, 0x0c, 0x30, 0x0a, 0x06, 0x03,
97 : 0x55, 0x04, 0x0a, 0x0c, 0x03, 0x43, 0x53, 0x41, 0x31, 0x2c, 0x30, 0x2a, 0x06, 0x03, 0x55, 0x04, 0x03, 0x0c, 0x23, 0x4d, 0x61,
98 : 0x74, 0x74, 0x65, 0x72, 0x20, 0x43, 0x65, 0x72, 0x74, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x61, 0x6e,
99 : 0x64, 0x20, 0x54, 0x65, 0x73, 0x74, 0x69, 0x6e, 0x67, 0x20, 0x43, 0x41, 0x31, 0x14, 0x30, 0x12, 0x06, 0x0a, 0x2b, 0x06, 0x01,
100 : 0x04, 0x01, 0x82, 0xa2, 0x7c, 0x02, 0x01, 0x0c, 0x04, 0x43, 0x35, 0x41, 0x30, 0x30, 0x20, 0x17, 0x0d, 0x32, 0x32, 0x30, 0x37,
101 : 0x30, 0x37, 0x31, 0x39, 0x32, 0x38, 0x30, 0x34, 0x5a, 0x18, 0x0f, 0x32, 0x31, 0x32, 0x32, 0x30, 0x36, 0x31, 0x33, 0x31, 0x39,
102 : 0x32, 0x38, 0x30, 0x34, 0x5a, 0x30, 0x52, 0x31, 0x0c, 0x30, 0x0a, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x0c, 0x03, 0x43, 0x53, 0x41,
103 : 0x31, 0x2c, 0x30, 0x2a, 0x06, 0x03, 0x55, 0x04, 0x03, 0x0c, 0x23, 0x4d, 0x61, 0x74, 0x74, 0x65, 0x72, 0x20, 0x43, 0x65, 0x72,
104 : 0x74, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x61, 0x6e, 0x64, 0x20, 0x54, 0x65, 0x73, 0x74, 0x69, 0x6e,
105 : 0x67, 0x20, 0x43, 0x41, 0x31, 0x14, 0x30, 0x12, 0x06, 0x0a, 0x2b, 0x06, 0x01, 0x04, 0x01, 0x82, 0xa2, 0x7c, 0x02, 0x01, 0x0c,
106 : 0x04, 0x43, 0x35, 0x41, 0x30, 0x30, 0x59, 0x30, 0x13, 0x06, 0x07, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x02, 0x01, 0x06, 0x08, 0x2a,
107 : 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, 0x03, 0x42, 0x00, 0x04, 0x38, 0x4a, 0x3a, 0xc3, 0xaa, 0x5d, 0xbe, 0xcb, 0x72, 0x0f,
108 : 0xe6, 0x21, 0x1d, 0x3c, 0xad, 0x48, 0x62, 0x6f, 0xf7, 0x11, 0xa0, 0xa4, 0x92, 0x9f, 0xad, 0xd8, 0x60, 0xf8, 0xe2, 0x77, 0xff,
109 : 0xc0, 0xde, 0x1f, 0x3e, 0xb6, 0x33, 0x7a, 0x34, 0x84, 0x7b, 0x5a, 0x3a, 0x05, 0x6e, 0xa8, 0x71, 0x0e, 0x93, 0x77, 0xee, 0xed,
110 : 0xee, 0x25, 0x17, 0x03, 0xfd, 0xd9, 0x35, 0x01, 0x25, 0xcb, 0x8e, 0x48, 0xa3, 0x66, 0x30, 0x64, 0x30, 0x12, 0x06, 0x03, 0x55,
111 : 0x1d, 0x13, 0x01, 0x01, 0xff, 0x04, 0x08, 0x30, 0x06, 0x01, 0x01, 0xff, 0x02, 0x01, 0x01, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x1d,
112 : 0x0f, 0x01, 0x01, 0xff, 0x04, 0x04, 0x03, 0x02, 0x01, 0x06, 0x30, 0x1d, 0x06, 0x03, 0x55, 0x1d, 0x0e, 0x04, 0x16, 0x04, 0x14,
113 : 0x97, 0xe4, 0x69, 0xd0, 0xc5, 0x04, 0x14, 0xc2, 0x6f, 0xc7, 0x01, 0xf7, 0x7e, 0x94, 0x77, 0x39, 0x09, 0x8d, 0xf6, 0xa5, 0x30,
114 : 0x1f, 0x06, 0x03, 0x55, 0x1d, 0x23, 0x04, 0x18, 0x30, 0x16, 0x80, 0x14, 0x97, 0xe4, 0x69, 0xd0, 0xc5, 0x04, 0x14, 0xc2, 0x6f,
115 : 0xc7, 0x01, 0xf7, 0x7e, 0x94, 0x77, 0x39, 0x09, 0x8d, 0xf6, 0xa5, 0x30, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x04,
116 : 0x03, 0x02, 0x03, 0x48, 0x00, 0x30, 0x45, 0x02, 0x20, 0x79, 0xaa, 0xe5, 0x07, 0x47, 0xc2, 0x27, 0x8f, 0x54, 0xa0, 0x9e, 0xb1,
117 : 0xc0, 0xa3, 0xdd, 0x94, 0xf1, 0x28, 0xa4, 0x23, 0x8b, 0xf6, 0x35, 0x42, 0xbe, 0x23, 0x83, 0x12, 0x57, 0x88, 0xfa, 0x64, 0x02,
118 : 0x21, 0x00, 0xef, 0xbc, 0x30, 0x8a, 0x8b, 0xb9, 0x2f, 0x8f, 0x84, 0x78, 0x06, 0x81, 0x52, 0xe0, 0x15, 0x59, 0x18, 0x29, 0x38,
119 : 0xcc, 0x9f, 0x38, 0x5b, 0x8b, 0x5f, 0x4d, 0x37, 0xee, 0xf3, 0xd9, 0x51, 0x6d
120 : };
121 :
122 : // Official CD "Signing Key 001"
123 : //
124 : // -----BEGIN CERTIFICATE-----
125 : // MIICBzCCAa2gAwIBAgIHY3NhY2RrMTAKBggqhkjOPQQDAjBSMQwwCgYDVQQKDAND
126 : // U0ExLDAqBgNVBAMMI01hdHRlciBDZXJ0aWZpY2F0aW9uIGFuZCBUZXN0aW5nIENB
127 : // MRQwEgYKKwYBBAGConwCAQwEQzVBMDAgFw0yMjEwMDMxOTI4NTVaGA8yMDcyMDky
128 : // MDE5Mjg1NVowWDEMMAoGA1UECgwDQ1NBMTIwMAYDVQQDDClDZXJ0aWZpY2F0aW9u
129 : // IERlY2xhcmF0aW9uIFNpZ25pbmcgS2V5IDAwMTEUMBIGCisGAQQBgqJ8AgEMBEM1
130 : // QTAwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAATN7uk+RPi3K+PRqcB+IZaLmv/z
131 : // tAPwXhZp17Hlyu5vx3FLQufiNpXpLNdjVHOigK5ojze7lInhFim5uU/3sJkpo2Yw
132 : // ZDASBgNVHRMBAf8ECDAGAQH/AgEAMA4GA1UdDwEB/wQEAwIBhjAdBgNVHQ4EFgQU
133 : // /jQ/lZlHdjth7kU5ExM4SU/mfY4wHwYDVR0jBBgwFoAUl+Rp0MUEFMJvxwH3fpR3
134 : // OQmN9qUwCgYIKoZIzj0EAwIDSAAwRQIgEDWOcdKsVGtUh3evHbBd1lq4aS7yQtOp
135 : // 6GrOQ3/zXBsCIQDxorh2RXSaI8m2RCcoWaiWa0nLzQepNm3C2jrQVJmC2Q==
136 : // -----END CERTIFICATE-----
137 : //
138 : constexpr uint8_t gCdSigningKey001PubkeyBytes[] = {
139 : 0x04, 0xcd, 0xee, 0xe9, 0x3e, 0x44, 0xf8, 0xb7, 0x2b, 0xe3, 0xd1, 0xa9, 0xc0, 0x7e, 0x21, 0x96, 0x8b,
140 : 0x9a, 0xff, 0xf3, 0xb4, 0x03, 0xf0, 0x5e, 0x16, 0x69, 0xd7, 0xb1, 0xe5, 0xca, 0xee, 0x6f, 0xc7, 0x71,
141 : 0x4b, 0x42, 0xe7, 0xe2, 0x36, 0x95, 0xe9, 0x2c, 0xd7, 0x63, 0x54, 0x73, 0xa2, 0x80, 0xae, 0x68, 0x8f,
142 : 0x37, 0xbb, 0x94, 0x89, 0xe1, 0x16, 0x29, 0xb9, 0xb9, 0x4f, 0xf7, 0xb0, 0x99, 0x29,
143 : };
144 :
145 : constexpr uint8_t gCdSigningKey001Kid[] = {
146 : 0xFE, 0x34, 0x3F, 0x95, 0x99, 0x47, 0x76, 0x3B, 0x61, 0xEE, 0x45, 0x39, 0x13, 0x13, 0x38, 0x49, 0x4F, 0xE6, 0x7D, 0x8E,
147 : };
148 :
149 : // Official CD "Signing Key 002"
150 : //
151 : // -----BEGIN CERTIFICATE-----
152 : // MIICCDCCAa2gAwIBAgIHY3NhY2RrMjAKBggqhkjOPQQDAjBSMQwwCgYDVQQKDAND
153 : // U0ExLDAqBgNVBAMMI01hdHRlciBDZXJ0aWZpY2F0aW9uIGFuZCBUZXN0aW5nIENB
154 : // MRQwEgYKKwYBBAGConwCAQwEQzVBMDAgFw0yMjEwMDMxOTM2NDZaGA8yMDcyMDky
155 : // MDE5MzY0NlowWDEMMAoGA1UECgwDQ1NBMTIwMAYDVQQDDClDZXJ0aWZpY2F0aW9u
156 : // IERlY2xhcmF0aW9uIFNpZ25pbmcgS2V5IDAwMjEUMBIGCisGAQQBgqJ8AgEMBEM1
157 : // QTAwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAAQDGTfo+UJRBF3ydFe7RiU+43VO
158 : // jBKuKFV9gCe51MNW2RtAjP8yJ1AXsl+Mi6IFFtXIOvK3JBKAE9/Mj5XSAKkLo2Yw
159 : // ZDASBgNVHRMBAf8ECDAGAQH/AgEAMA4GA1UdDwEB/wQEAwIBhjAdBgNVHQ4EFgQU
160 : // 3QTbWFshTBxYFYfmVo30h7bdxwEwHwYDVR0jBBgwFoAUl+Rp0MUEFMJvxwH3fpR3
161 : // OQmN9qUwCgYIKoZIzj0EAwIDSQAwRgIhAJruzxZ806cP/LoQ07PN9xAbjLdwUalV
162 : // h0Qfx304Tb92AiEAk+jnf2qtyfKyTEHpT3Xf3bfekqUOA+8ikB1yjL5oTsI=
163 : // -----END CERTIFICATE-----
164 : //
165 : constexpr uint8_t gCdSigningKey002PubkeyBytes[] = {
166 : 0x04, 0x03, 0x19, 0x37, 0xe8, 0xf9, 0x42, 0x51, 0x04, 0x5d, 0xf2, 0x74, 0x57, 0xbb, 0x46, 0x25, 0x3e,
167 : 0xe3, 0x75, 0x4e, 0x8c, 0x12, 0xae, 0x28, 0x55, 0x7d, 0x80, 0x27, 0xb9, 0xd4, 0xc3, 0x56, 0xd9, 0x1b,
168 : 0x40, 0x8c, 0xff, 0x32, 0x27, 0x50, 0x17, 0xb2, 0x5f, 0x8c, 0x8b, 0xa2, 0x05, 0x16, 0xd5, 0xc8, 0x3a,
169 : 0xf2, 0xb7, 0x24, 0x12, 0x80, 0x13, 0xdf, 0xcc, 0x8f, 0x95, 0xd2, 0x00, 0xa9, 0x0b,
170 : };
171 :
172 : constexpr uint8_t gCdSigningKey002Kid[] = {
173 : 0xDD, 0x04, 0xDB, 0x58, 0x5B, 0x21, 0x4C, 0x1C, 0x58, 0x15, 0x87, 0xE6, 0x56, 0x8D, 0xF4, 0x87, 0xB6, 0xDD, 0xC7, 0x01,
174 : };
175 :
176 : // Official CD "Signing Key 003"
177 : //
178 : // -----BEGIN CERTIFICATE-----
179 : // MIICBjCCAa2gAwIBAgIHY3NhY2RrMzAKBggqhkjOPQQDAjBSMQwwCgYDVQQKDAND
180 : // U0ExLDAqBgNVBAMMI01hdHRlciBDZXJ0aWZpY2F0aW9uIGFuZCBUZXN0aW5nIENB
181 : // MRQwEgYKKwYBBAGConwCAQwEQzVBMDAgFw0yMjEwMDMxOTQxMDFaGA8yMDcyMDky
182 : // MDE5NDEwMVowWDEMMAoGA1UECgwDQ1NBMTIwMAYDVQQDDClDZXJ0aWZpY2F0aW9u
183 : // IERlY2xhcmF0aW9uIFNpZ25pbmcgS2V5IDAwMzEUMBIGCisGAQQBgqJ8AgEMBEM1
184 : // QTAwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAASfV1zV/bdSHxCk3zHwc5ErYUco
185 : // 8tN/W2uWvCy/fAsRlpBXfVVdIaCWYKiwgqM56lMPeoEthpO1b9dkGF+rzTL1o2Yw
186 : // ZDASBgNVHRMBAf8ECDAGAQH/AgEAMA4GA1UdDwEB/wQEAwIBhjAdBgNVHQ4EFgQU
187 : // RxA158BOqqi+fE1ME+PkwgmVqEswHwYDVR0jBBgwFoAUl+Rp0MUEFMJvxwH3fpR3
188 : // OQmN9qUwCgYIKoZIzj0EAwIDRwAwRAIgIFecbY+1mVVNqxH9+8IMB8+safdyIJU2
189 : // AqqtZ/w7AkQCIHiVlYTaCnJsnW5/cvj9GfIv7Eb0cjdmcAkrYGbnPQzX
190 : // -----END CERTIFICATE-----
191 : //
192 : constexpr uint8_t gCdSigningKey003PubkeyBytes[] = {
193 : 0x04, 0x9f, 0x57, 0x5c, 0xd5, 0xfd, 0xb7, 0x52, 0x1f, 0x10, 0xa4, 0xdf, 0x31, 0xf0, 0x73, 0x91, 0x2b,
194 : 0x61, 0x47, 0x28, 0xf2, 0xd3, 0x7f, 0x5b, 0x6b, 0x96, 0xbc, 0x2c, 0xbf, 0x7c, 0x0b, 0x11, 0x96, 0x90,
195 : 0x57, 0x7d, 0x55, 0x5d, 0x21, 0xa0, 0x96, 0x60, 0xa8, 0xb0, 0x82, 0xa3, 0x39, 0xea, 0x53, 0x0f, 0x7a,
196 : 0x81, 0x2d, 0x86, 0x93, 0xb5, 0x6f, 0xd7, 0x64, 0x18, 0x5f, 0xab, 0xcd, 0x32, 0xf5,
197 : };
198 :
199 : constexpr uint8_t gCdSigningKey003Kid[] = {
200 : 0x47, 0x10, 0x35, 0xE7, 0xC0, 0x4E, 0xAA, 0xA8, 0xBE, 0x7C, 0x4D, 0x4C, 0x13, 0xE3, 0xE4, 0xC2, 0x09, 0x95, 0xA8, 0x4B,
201 : };
202 :
203 : // Official CD "Signing Key 004"
204 : //
205 : // -----BEGIN CERTIFICATE-----
206 : // MIICBjCCAa2gAwIBAgIHY3NhY2RrNDAKBggqhkjOPQQDAjBSMQwwCgYDVQQKDAND
207 : // U0ExLDAqBgNVBAMMI01hdHRlciBDZXJ0aWZpY2F0aW9uIGFuZCBUZXN0aW5nIENB
208 : // MRQwEgYKKwYBBAGConwCAQwEQzVBMDAgFw0yMjEwMDMxOTQzMjFaGA8yMDcyMDky
209 : // MDE5NDMyMVowWDEMMAoGA1UECgwDQ1NBMTIwMAYDVQQDDClDZXJ0aWZpY2F0aW9u
210 : // IERlY2xhcmF0aW9uIFNpZ25pbmcgS2V5IDAwNDEUMBIGCisGAQQBgqJ8AgEMBEM1
211 : // QTAwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAAR8/I2IEKic9PoZF3jyr+x4+FF6
212 : // l6Plf8ITutiI42EedP+2hL3rqKaLJSNKXDWPNzurm20wThMG3XYgpSjRFhwLo2Yw
213 : // ZDASBgNVHRMBAf8ECDAGAQH/AgEAMA4GA1UdDwEB/wQEAwIBhjAdBgNVHQ4EFgQU
214 : // 9oYDo2kumBByQZ6h4as4VL13ldMwHwYDVR0jBBgwFoAUl+Rp0MUEFMJvxwH3fpR3
215 : // OQmN9qUwCgYIKoZIzj0EAwIDRwAwRAIgLqAfkbtLYYdmQsnbn0CWv3G1/lbE36nz
216 : // HbLbW5t6PY4CIE8oyIHsVhNSTPcb3mwRp+Vxhs8tKhbAdwv5BGgDaAHj
217 : // -----END CERTIFICATE-----
218 : //
219 : constexpr uint8_t gCdSigningKey004PubkeyBytes[] = {
220 : 0x04, 0x7c, 0xfc, 0x8d, 0x88, 0x10, 0xa8, 0x9c, 0xf4, 0xfa, 0x19, 0x17, 0x78, 0xf2, 0xaf, 0xec, 0x78,
221 : 0xf8, 0x51, 0x7a, 0x97, 0xa3, 0xe5, 0x7f, 0xc2, 0x13, 0xba, 0xd8, 0x88, 0xe3, 0x61, 0x1e, 0x74, 0xff,
222 : 0xb6, 0x84, 0xbd, 0xeb, 0xa8, 0xa6, 0x8b, 0x25, 0x23, 0x4a, 0x5c, 0x35, 0x8f, 0x37, 0x3b, 0xab, 0x9b,
223 : 0x6d, 0x30, 0x4e, 0x13, 0x06, 0xdd, 0x76, 0x20, 0xa5, 0x28, 0xd1, 0x16, 0x1c, 0x0b,
224 : };
225 :
226 : constexpr uint8_t gCdSigningKey004Kid[] = {
227 : 0xF6, 0x86, 0x03, 0xA3, 0x69, 0x2E, 0x98, 0x10, 0x72, 0x41, 0x9E, 0xA1, 0xE1, 0xAB, 0x38, 0x54, 0xBD, 0x77, 0x95, 0xD3,
228 : };
229 :
230 : // Official CD "Signing Key 005"
231 : //
232 : // -----BEGIN CERTIFICATE-----
233 : // MIICBzCCAa2gAwIBAgIHY3NhY2RrNTAKBggqhkjOPQQDAjBSMQwwCgYDVQQKDAND
234 : // U0ExLDAqBgNVBAMMI01hdHRlciBDZXJ0aWZpY2F0aW9uIGFuZCBUZXN0aW5nIENB
235 : // MRQwEgYKKwYBBAGConwCAQwEQzVBMDAgFw0yMjEwMDMxOTQ3MTVaGA8yMDcyMDky
236 : // MDE5NDcxNVowWDEMMAoGA1UECgwDQ1NBMTIwMAYDVQQDDClDZXJ0aWZpY2F0aW9u
237 : // IERlY2xhcmF0aW9uIFNpZ25pbmcgS2V5IDAwNTEUMBIGCisGAQQBgqJ8AgEMBEM1
238 : // QTAwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAARDilLGYqKm1yZH+V63UxNu5K4P
239 : // 2zqpwWkxQms9CGf5EDrn16G4h+n4E6byb3a7zak1k3h8EneMqPKXXcRaIEL5o2Yw
240 : // ZDASBgNVHRMBAf8ECDAGAQH/AgEAMA4GA1UdDwEB/wQEAwIBhjAdBgNVHQ4EFgQU
241 : // Y38mNK1i6v5q9mLvuW9v0vy//C8wHwYDVR0jBBgwFoAUl+Rp0MUEFMJvxwH3fpR3
242 : // OQmN9qUwCgYIKoZIzj0EAwIDSAAwRQIhAM1HQpvkHKxLJByWaSYAPRZgh3Bis18W
243 : // AViq7c/mtzEAAiBZO0lVe6Qo9iQPIBWZaVx/S/YSNO9uKNa/pvFu3V+nIg==
244 : // -----END CERTIFICATE-----
245 : //
246 : constexpr uint8_t gCdSigningKey005PubkeyBytes[] = {
247 : 0x04, 0x43, 0x8a, 0x52, 0xc6, 0x62, 0xa2, 0xa6, 0xd7, 0x26, 0x47, 0xf9, 0x5e, 0xb7, 0x53, 0x13, 0x6e,
248 : 0xe4, 0xae, 0x0f, 0xdb, 0x3a, 0xa9, 0xc1, 0x69, 0x31, 0x42, 0x6b, 0x3d, 0x08, 0x67, 0xf9, 0x10, 0x3a,
249 : 0xe7, 0xd7, 0xa1, 0xb8, 0x87, 0xe9, 0xf8, 0x13, 0xa6, 0xf2, 0x6f, 0x76, 0xbb, 0xcd, 0xa9, 0x35, 0x93,
250 : 0x78, 0x7c, 0x12, 0x77, 0x8c, 0xa8, 0xf2, 0x97, 0x5d, 0xc4, 0x5a, 0x20, 0x42, 0xf9,
251 : };
252 :
253 : constexpr uint8_t gCdSigningKey005Kid[] = {
254 : 0x63, 0x7F, 0x26, 0x34, 0xAD, 0x62, 0xEA, 0xFE, 0x6A, 0xF6, 0x62, 0xEF, 0xB9, 0x6F, 0x6F, 0xD2, 0xFC, 0xBF, 0xFC, 0x2F,
255 : };
256 :
257 : struct MatterCDSigningKey
258 : {
259 : const CertificateKeyId mKid;
260 : const P256PublicKeySpan mPubkey;
261 : };
262 :
263 : constexpr std::array<MatterCDSigningKey, 6> gCdSigningKeys = { {
264 : { FixedByteSpan<20>{ gTestCdPubkeyKid }, FixedByteSpan<65>{ gTestCdPubkeyBytes } },
265 : { FixedByteSpan<20>{ gCdSigningKey001Kid }, FixedByteSpan<65>{ gCdSigningKey001PubkeyBytes } },
266 : { FixedByteSpan<20>{ gCdSigningKey002Kid }, FixedByteSpan<65>{ gCdSigningKey002PubkeyBytes } },
267 : { FixedByteSpan<20>{ gCdSigningKey003Kid }, FixedByteSpan<65>{ gCdSigningKey003PubkeyBytes } },
268 : { FixedByteSpan<20>{ gCdSigningKey004Kid }, FixedByteSpan<65>{ gCdSigningKey004PubkeyBytes } },
269 : { FixedByteSpan<20>{ gCdSigningKey005Kid }, FixedByteSpan<65>{ gCdSigningKey005PubkeyBytes } },
270 : } };
271 :
272 : struct TestAttestationTrustStore final : public ArrayAttestationTrustStore
273 : {
274 3 : TestAttestationTrustStore() : ArrayAttestationTrustStore(GetTestPaaRootStore().data(), GetTestPaaRootStore().size()) {}
275 : };
276 : Global<TestAttestationTrustStore> gTestAttestationTrustStore;
277 :
278 0 : AttestationVerificationResult MapError(CertificateChainValidationResult certificateChainValidationResult)
279 : {
280 0 : switch (certificateChainValidationResult)
281 : {
282 0 : case CertificateChainValidationResult::kRootFormatInvalid:
283 0 : return AttestationVerificationResult::kPaaFormatInvalid;
284 :
285 0 : case CertificateChainValidationResult::kRootArgumentInvalid:
286 0 : return AttestationVerificationResult::kPaaArgumentInvalid;
287 :
288 0 : case CertificateChainValidationResult::kICAFormatInvalid:
289 0 : return AttestationVerificationResult::kPaiFormatInvalid;
290 :
291 0 : case CertificateChainValidationResult::kICAArgumentInvalid:
292 0 : return AttestationVerificationResult::kPaiArgumentInvalid;
293 :
294 0 : case CertificateChainValidationResult::kLeafFormatInvalid:
295 0 : return AttestationVerificationResult::kDacFormatInvalid;
296 :
297 0 : case CertificateChainValidationResult::kLeafArgumentInvalid:
298 0 : return AttestationVerificationResult::kDacArgumentInvalid;
299 :
300 0 : case CertificateChainValidationResult::kChainInvalid:
301 0 : return AttestationVerificationResult::kDacSignatureInvalid;
302 :
303 0 : case CertificateChainValidationResult::kNoMemory:
304 0 : return AttestationVerificationResult::kNoMemory;
305 :
306 0 : case CertificateChainValidationResult::kInternalFrameworkError:
307 0 : return AttestationVerificationResult::kInternalError;
308 :
309 0 : default:
310 0 : return AttestationVerificationResult::kInternalError;
311 : }
312 : }
313 :
314 : // CertificateType class doesn't work since it doesn't encode PAA.
315 : enum class AttestationChainElement : uint8_t
316 : {
317 : kPAA = 0,
318 : kPAI = 1,
319 : kDAC = 2
320 : };
321 :
322 : enum class KeyIdType : uint8_t
323 : {
324 : kAuthorityKeyId = 0,
325 : kSubjectKeyId = 1,
326 : };
327 :
328 : #if CHIP_PROGRESS_LOGGING
329 9 : const char * CertTypeAsString(AttestationChainElement certType)
330 : {
331 9 : switch (certType)
332 : {
333 3 : case AttestationChainElement::kPAA:
334 3 : return "PAA";
335 3 : case AttestationChainElement::kPAI:
336 3 : return "PAI";
337 3 : case AttestationChainElement::kDAC:
338 3 : return "DAC";
339 0 : default:
340 0 : break;
341 : }
342 0 : return "<UNKNOWN>";
343 : }
344 : #endif // CHIP_PROGRESS_LOGGING
345 :
346 6 : void LogOneKeyId(KeyIdType keyIdType, AttestationChainElement certType, ByteSpan derBuffer)
347 : {
348 : #if CHIP_PROGRESS_LOGGING
349 6 : const char * certTypeName = CertTypeAsString(certType);
350 :
351 : uint8_t keyIdBuf[Crypto::kAuthorityKeyIdentifierLength]; // Big enough for SKID/AKID.
352 6 : MutableByteSpan keyIdSpan{ keyIdBuf };
353 6 : CHIP_ERROR err = CHIP_NO_ERROR;
354 :
355 6 : const char * keyIdTypeString = "<UNKNOWN>";
356 6 : switch (keyIdType)
357 : {
358 3 : case KeyIdType::kAuthorityKeyId:
359 3 : err = ExtractAKIDFromX509Cert(derBuffer, keyIdSpan);
360 3 : keyIdTypeString = "AKID";
361 3 : break;
362 3 : case KeyIdType::kSubjectKeyId:
363 3 : err = ExtractSKIDFromX509Cert(derBuffer, keyIdSpan);
364 3 : keyIdTypeString = "SKID";
365 3 : break;
366 0 : default:
367 0 : err = CHIP_ERROR_INTERNAL;
368 0 : break;
369 : }
370 :
371 6 : if (err != CHIP_NO_ERROR)
372 : {
373 0 : ChipLogError(NotSpecified, "Failed to extract %s from %s: %" CHIP_ERROR_FORMAT, keyIdTypeString, certTypeName,
374 : err.Format());
375 0 : return;
376 : }
377 :
378 6 : KeyIdStringifier KeyIdStringifier;
379 6 : const char * keyIdString = KeyIdStringifier.KeyIdToHex(keyIdSpan);
380 :
381 6 : ChipLogProgress(NotSpecified, "--> %s certificate %s: %s", certTypeName, keyIdTypeString, keyIdString);
382 : #else
383 : IgnoreUnusedVariable(keyIdType);
384 : IgnoreUnusedVariable(certType);
385 : IgnoreUnusedVariable(derBuffer);
386 : #endif // CHIP_PROGRESS_LOGGING
387 : }
388 :
389 3 : void LogCertificateAsPem(AttestationChainElement element, ByteSpan derBuffer)
390 : {
391 : #if CHIP_PROGRESS_LOGGING
392 3 : ChipLogProgress(NotSpecified, "==== %s certificate considered (%u bytes) ====", CertTypeAsString(element),
393 : static_cast<unsigned>(derBuffer.size()));
394 3 : PemEncoder encoder("CERTIFICATE", derBuffer);
395 40 : for (const char * pemLine = encoder.NextLine(); pemLine != nullptr; pemLine = encoder.NextLine())
396 : {
397 37 : ChipLogProgress(NotSpecified, "%s", pemLine);
398 : }
399 : #else
400 : IgnoreUnusedVariable(element);
401 : IgnoreUnusedVariable(derBuffer);
402 : #endif // CHIP_PROGRESS_LOGGING
403 3 : }
404 :
405 3 : void LogCertDebugData(AttestationChainElement element, ByteSpan derBuffer)
406 : {
407 3 : LogCertificateAsPem(element, derBuffer);
408 3 : LogOneKeyId(KeyIdType::kSubjectKeyId, element, derBuffer);
409 3 : LogOneKeyId(KeyIdType::kAuthorityKeyId, element, derBuffer);
410 3 : }
411 :
412 : #if CHIP_PROGRESS_LOGGING
413 2 : const char * CertificationTypeAsString(CertificationType certificationType)
414 : {
415 2 : switch (certificationType)
416 : {
417 2 : case CertificationType::kDevelopmentAndTest:
418 2 : return "Development and testing";
419 0 : case CertificationType::kProvisional:
420 0 : return "Provisional certification";
421 0 : case CertificationType::kOfficial:
422 0 : return "Certified device";
423 0 : default:
424 0 : break;
425 : }
426 0 : return "<UNKNOWN>";
427 : }
428 : #endif
429 :
430 : } // namespace
431 :
432 153 : void DefaultDACVerifier::VerifyAttestationInformation(const DeviceAttestationVerifier::AttestationInfo & info,
433 : Callback::Callback<OnAttestationInformationVerification> * onCompletion)
434 : {
435 153 : AttestationVerificationResult attestationError = AttestationVerificationResult::kSuccess;
436 :
437 153 : Platform::ScopedMemoryBuffer<uint8_t> paaCert;
438 153 : MutableByteSpan paaDerBuffer;
439 153 : AttestationCertVidPid dacVidPid;
440 153 : AttestationCertVidPid paiVidPid;
441 153 : AttestationCertVidPid paaVidPid;
442 :
443 153 : VerifyOrExit(!info.attestationElementsBuffer.empty() && !info.attestationChallengeBuffer.empty() &&
444 : !info.attestationSignatureBuffer.empty() && !info.dacDerBuffer.empty() &&
445 : !info.attestationNonceBuffer.empty() && onCompletion != nullptr,
446 : attestationError = AttestationVerificationResult::kInvalidArgument);
447 :
448 153 : VerifyOrExit(info.attestationElementsBuffer.size() <= kMaxResponseLength,
449 : attestationError = AttestationVerificationResult::kInvalidArgument);
450 :
451 : // Ensure PAI is present
452 153 : VerifyOrExit(!info.paiDerBuffer.empty(), attestationError = AttestationVerificationResult::kPaiMissing);
453 :
454 : // Validate Proper Certificate Format
455 : {
456 153 : VerifyOrExit(VerifyAttestationCertificateFormat(info.paiDerBuffer, AttestationCertType::kPAI) == CHIP_NO_ERROR,
457 : attestationError = AttestationVerificationResult::kPaiFormatInvalid);
458 135 : VerifyOrExit(VerifyAttestationCertificateFormat(info.dacDerBuffer, AttestationCertType::kDAC) == CHIP_NO_ERROR,
459 : attestationError = AttestationVerificationResult::kDacFormatInvalid);
460 : }
461 :
462 : // match DAC and PAI VIDs
463 : {
464 116 : VerifyOrExit(ExtractVIDPIDFromX509Cert(info.dacDerBuffer, dacVidPid) == CHIP_NO_ERROR,
465 : attestationError = AttestationVerificationResult::kDacFormatInvalid);
466 109 : VerifyOrExit(ExtractVIDPIDFromX509Cert(info.paiDerBuffer, paiVidPid) == CHIP_NO_ERROR,
467 : attestationError = AttestationVerificationResult::kPaiFormatInvalid);
468 102 : VerifyOrExit(paiVidPid.mVendorId.HasValue() && paiVidPid.mVendorId == dacVidPid.mVendorId,
469 : attestationError = AttestationVerificationResult::kDacVendorIdMismatch);
470 93 : VerifyOrExit(dacVidPid.mProductId.HasValue(), attestationError = AttestationVerificationResult::kDacProductIdMismatch);
471 93 : if (paiVidPid.mProductId.HasValue())
472 : {
473 71 : VerifyOrExit(paiVidPid.mProductId == dacVidPid.mProductId,
474 : attestationError = AttestationVerificationResult::kDacProductIdMismatch);
475 : }
476 : }
477 :
478 : // Log info about the DAC chain so far (DAC, PAI).
479 93 : if (AreVerboseLogsEnabled())
480 : {
481 1 : ChipLogProgress(NotSpecified, "Device candidate DAC chain details:");
482 1 : ChipLogProgress(NotSpecified, "--> DAC's VID: 0x%04X, PID: 0x%04X", dacVidPid.mVendorId.Value(),
483 : dacVidPid.mProductId.Value());
484 :
485 1 : LogCertDebugData(AttestationChainElement::kDAC, info.dacDerBuffer);
486 1 : LogCertDebugData(AttestationChainElement::kPAI, info.paiDerBuffer);
487 : }
488 :
489 : // Validate overall attestation signature on attestation information.
490 : {
491 93 : P256PublicKey remoteManufacturerPubkey;
492 93 : P256ECDSASignature deviceSignature;
493 :
494 93 : VerifyOrExit(ExtractPubkeyFromX509Cert(info.dacDerBuffer, remoteManufacturerPubkey) == CHIP_NO_ERROR,
495 : attestationError = AttestationVerificationResult::kDacFormatInvalid);
496 :
497 : // SetLength will fail if signature doesn't fit
498 93 : VerifyOrExit(deviceSignature.SetLength(info.attestationSignatureBuffer.size()) == CHIP_NO_ERROR,
499 : attestationError = AttestationVerificationResult::kAttestationSignatureInvalidFormat);
500 93 : memcpy(deviceSignature.Bytes(), info.attestationSignatureBuffer.data(), info.attestationSignatureBuffer.size());
501 93 : VerifyOrExit(ValidateAttestationSignature(remoteManufacturerPubkey, info.attestationElementsBuffer,
502 : info.attestationChallengeBuffer, deviceSignature) == CHIP_NO_ERROR,
503 : attestationError = AttestationVerificationResult::kAttestationSignatureInvalid);
504 93 : }
505 :
506 : // Find PAA and validate it.
507 : {
508 : uint8_t paiAkidBuf[Crypto::kAuthorityKeyIdentifierLength];
509 93 : MutableByteSpan paiAkid(paiAkidBuf);
510 93 : constexpr size_t paaCertAllocatedLen = kMaxDERCertLength;
511 93 : CHIP_ERROR err = CHIP_NO_ERROR;
512 :
513 95 : VerifyOrExit(ExtractAKIDFromX509Cert(info.paiDerBuffer, paiAkid) == CHIP_NO_ERROR,
514 : attestationError = AttestationVerificationResult::kPaiFormatInvalid);
515 :
516 93 : VerifyOrExit(paaCert.Alloc(paaCertAllocatedLen), attestationError = AttestationVerificationResult::kNoMemory);
517 :
518 93 : paaDerBuffer = MutableByteSpan(paaCert.Get(), paaCertAllocatedLen);
519 93 : err = mAttestationTrustStore->GetProductAttestationAuthorityCert(paiAkid, paaDerBuffer);
520 93 : if (err == CHIP_ERROR_NOT_IMPLEMENTED)
521 : {
522 0 : err = gTestAttestationTrustStore->GetProductAttestationAuthorityCert(paiAkid, paaDerBuffer);
523 : }
524 :
525 93 : if (err != CHIP_NO_ERROR)
526 : {
527 1 : attestationError = AttestationVerificationResult::kPaaNotFound;
528 : #if CHIP_ERROR_LOGGING
529 1 : KeyIdStringifier paiAkidWriter;
530 1 : [[maybe_unused]] const char * paiAkidHexString = paiAkidWriter.KeyIdToHex(paiAkid);
531 :
532 1 : ChipLogError(NotSpecified, "Unable to find PAA, err: %" CHIP_ERROR_FORMAT ", PAI's AKID: %s", err.Format(),
533 : paiAkidHexString);
534 : #endif // CHIP_ERROR_LOGGING
535 1 : ExitNow();
536 : }
537 :
538 92 : if (AreVerboseLogsEnabled())
539 : {
540 : // PAA details following the DAC/PAI above.
541 1 : LogCertDebugData(AttestationChainElement::kPAA, paaDerBuffer);
542 : }
543 :
544 92 : VerifyOrExit(ExtractVIDPIDFromX509Cert(paaDerBuffer, paaVidPid) == CHIP_NO_ERROR,
545 : attestationError = AttestationVerificationResult::kPaaFormatInvalid);
546 :
547 92 : if (paaVidPid.mVendorId.HasValue())
548 : {
549 91 : VerifyOrExit(paaVidPid.mVendorId == paiVidPid.mVendorId,
550 : attestationError = AttestationVerificationResult::kPaiVendorIdMismatch);
551 : }
552 :
553 91 : VerifyOrExit(!paaVidPid.mProductId.HasValue(), attestationError = AttestationVerificationResult::kPaaFormatInvalid);
554 : }
555 :
556 : #if !defined(CURRENT_TIME_NOT_IMPLEMENTED)
557 91 : VerifyOrExit(IsCertificateValidAtCurrentTime(info.dacDerBuffer) == CHIP_NO_ERROR,
558 : attestationError = AttestationVerificationResult::kDacExpired);
559 : #endif
560 :
561 : CertificateChainValidationResult chainValidationResult;
562 87 : VerifyOrExit(ValidateCertificateChain(paaDerBuffer.data(), paaDerBuffer.size(), info.paiDerBuffer.data(),
563 : info.paiDerBuffer.size(), info.dacDerBuffer.data(), info.dacDerBuffer.size(),
564 : chainValidationResult) == CHIP_NO_ERROR,
565 : attestationError = MapError(chainValidationResult));
566 :
567 : {
568 87 : ByteSpan certificationDeclarationSpan;
569 87 : ByteSpan attestationNonceSpan;
570 : uint32_t timestampDeconstructed;
571 87 : ByteSpan firmwareInfoSpan;
572 87 : DeviceAttestationVendorReservedDeconstructor vendorReserved;
573 87 : ByteSpan certificationDeclarationPayload;
574 :
575 87 : DeviceInfoForAttestation deviceInfo{
576 87 : .vendorId = info.vendorId,
577 87 : .productId = info.productId,
578 174 : .dacVendorId = dacVidPid.mVendorId.Value(),
579 174 : .dacProductId = dacVidPid.mProductId.Value(),
580 174 : .paiVendorId = paiVidPid.mVendorId.Value(),
581 174 : .paiProductId = paiVidPid.mProductId.ValueOr(0),
582 174 : .paaVendorId = paaVidPid.mVendorId.ValueOr(VendorId::NotSpecified),
583 87 : };
584 :
585 87 : MutableByteSpan paaSKID(deviceInfo.paaSKID);
586 121 : VerifyOrExit(ExtractSKIDFromX509Cert(paaDerBuffer, paaSKID) == CHIP_NO_ERROR,
587 : attestationError = AttestationVerificationResult::kPaaFormatInvalid);
588 87 : VerifyOrExit(paaSKID.size() == sizeof(deviceInfo.paaSKID),
589 : attestationError = AttestationVerificationResult::kPaaFormatInvalid);
590 :
591 87 : VerifyOrExit(DeconstructAttestationElements(info.attestationElementsBuffer, certificationDeclarationSpan,
592 : attestationNonceSpan, timestampDeconstructed, firmwareInfoSpan,
593 : vendorReserved) == CHIP_NO_ERROR,
594 : attestationError = AttestationVerificationResult::kAttestationElementsMalformed);
595 :
596 : // Verify that Nonce matches with what we sent
597 87 : VerifyOrExit(attestationNonceSpan.data_equal(info.attestationNonceBuffer),
598 : attestationError = AttestationVerificationResult::kAttestationNonceMismatch);
599 :
600 87 : attestationError = ValidateCertificationDeclarationSignature(certificationDeclarationSpan, certificationDeclarationPayload);
601 87 : VerifyOrExit(attestationError == AttestationVerificationResult::kSuccess, attestationError = attestationError);
602 :
603 79 : attestationError = ValidateCertificateDeclarationPayload(certificationDeclarationPayload, firmwareInfoSpan, deviceInfo);
604 79 : VerifyOrExit(attestationError == AttestationVerificationResult::kSuccess, attestationError = attestationError);
605 : }
606 :
607 153 : exit:
608 153 : onCompletion->mCall(onCompletion->mContext, info, attestationError);
609 153 : }
610 :
611 88 : AttestationVerificationResult DefaultDACVerifier::ValidateCertificationDeclarationSignature(const ByteSpan & cmsEnvelopeBuffer,
612 : ByteSpan & certDeclBuffer)
613 : {
614 88 : ByteSpan kid;
615 88 : VerifyOrReturnError(CMS_ExtractKeyId(cmsEnvelopeBuffer, kid) == CHIP_NO_ERROR,
616 : AttestationVerificationResult::kCertificationDeclarationNoKeyId);
617 :
618 85 : Crypto::P256PublicKey verifyingKey;
619 85 : CHIP_ERROR err = mCdKeysTrustStore.LookupVerifyingKey(kid, verifyingKey);
620 85 : VerifyOrReturnError(err == CHIP_NO_ERROR, AttestationVerificationResult::kCertificationDeclarationNoCertificateFound);
621 :
622 : #if CHIP_PROGRESS_LOGGING
623 84 : if (AreVerboseLogsEnabled())
624 : {
625 2 : KeyIdStringifier cdAkidWriter;
626 2 : const char * cdAkidHexString = cdAkidWriter.KeyIdToHex(kid);
627 2 : ChipLogProgress(NotSpecified, "CD signing key identifier: %s", cdAkidHexString);
628 : }
629 : #endif
630 :
631 84 : if (mCdKeysTrustStore.IsCdTestKey(kid))
632 : {
633 : // Disallow test key if support not enabled
634 84 : if (!IsCdTestKeySupported())
635 : {
636 0 : ChipLogError(NotSpecified, "Disallowing CD signed by test key");
637 0 : return AttestationVerificationResult::kCertificationDeclarationNoCertificateFound;
638 : }
639 :
640 84 : ChipLogProgress(NotSpecified, "Allowing CD signed by test key");
641 : }
642 :
643 84 : VerifyOrReturnError(CMS_Verify(cmsEnvelopeBuffer, verifyingKey, certDeclBuffer) == CHIP_NO_ERROR,
644 : AttestationVerificationResult::kCertificationDeclarationInvalidSignature);
645 :
646 80 : return AttestationVerificationResult::kSuccess;
647 85 : }
648 :
649 80 : AttestationVerificationResult DefaultDACVerifier::ValidateCertificateDeclarationPayload(const ByteSpan & certDeclBuffer,
650 : const ByteSpan & firmwareInfo,
651 : const DeviceInfoForAttestation & deviceInfo)
652 : {
653 80 : CertificationElementsWithoutPIDs cdContent;
654 80 : CertificationElementsDecoder cdElementsDecoder;
655 80 : VerifyOrReturnError(DecodeCertificationElements(certDeclBuffer, cdContent) == CHIP_NO_ERROR,
656 : AttestationVerificationResult::kCertificationDeclarationInvalidFormat);
657 :
658 68 : if (!firmwareInfo.empty())
659 : {
660 : // TODO: validate contents based on DCL
661 : }
662 :
663 : // Verify the cd elements are as required by the spec
664 : // security_level, security_information are meant to be ignored. version_number is not meant to be interpreted by the
665 : // commissioners.
666 68 : if (cdContent.formatVersion != 1 || cdContent.certificationType >= chip::to_underlying(CertificationType::kReserved))
667 : {
668 2 : return AttestationVerificationResult::kAttestationElementsMalformed;
669 : }
670 :
671 : // The vendor_id field in the Certification Declaration SHALL match the VendorID attribute found in the Basic Information
672 : // cluster
673 66 : VerifyOrReturnError(cdContent.vendorId == deviceInfo.vendorId,
674 : AttestationVerificationResult::kCertificationDeclarationInvalidVendorId);
675 :
676 : // The product_id_array field in the Certification Declaration SHALL contain the value of the ProductID attribute found in
677 : // the Basic Information cluster.
678 65 : VerifyOrReturnError(cdElementsDecoder.IsProductIdIn(certDeclBuffer, deviceInfo.productId),
679 : AttestationVerificationResult::kCertificationDeclarationInvalidProductId);
680 :
681 60 : if (cdContent.dacOriginVIDandPIDPresent)
682 : {
683 : // The Vendor ID (VID) subject DN in the DAC SHALL match the dac_origin_vendor_id field in the Certification
684 : // Declaration.
685 4 : VerifyOrReturnError(deviceInfo.dacVendorId == cdContent.dacOriginVendorId,
686 : AttestationVerificationResult::kCertificationDeclarationInvalidVendorId);
687 : // The Vendor ID (VID) subject DN in the PAI SHALL match the dac_origin_vendor_id field in the Certification
688 : // Declaration.
689 2 : VerifyOrReturnError(deviceInfo.paiVendorId == cdContent.dacOriginVendorId,
690 : AttestationVerificationResult::kCertificationDeclarationInvalidVendorId);
691 : // The Product ID (PID) subject DN in the DAC SHALL match the dac_origin_product_id field in the Certification
692 : // Declaration.
693 2 : VerifyOrReturnError(deviceInfo.dacProductId == cdContent.dacOriginProductId,
694 : AttestationVerificationResult::kCertificationDeclarationInvalidProductId);
695 : // The Product ID (PID) subject DN in the PAI, if such a Product ID is present, SHALL match the dac_origin_product_id
696 : // field in the Certification Declaration.
697 2 : if (deviceInfo.paiProductId != 0) // if PAI PID is present
698 : {
699 2 : VerifyOrReturnError(deviceInfo.paiProductId == cdContent.dacOriginProductId,
700 : AttestationVerificationResult::kCertificationDeclarationInvalidProductId);
701 : }
702 : }
703 : else
704 : {
705 : // The Vendor ID (VID) subject DN in the DAC SHALL match the vendor_id field in the Certification Declaration
706 56 : VerifyOrReturnError(deviceInfo.dacVendorId == cdContent.vendorId,
707 : AttestationVerificationResult::kCertificationDeclarationInvalidVendorId);
708 : // The Vendor ID (VID) subject DN in the PAI SHALL match the vendor_id field in the Certification Declaration.
709 56 : VerifyOrReturnError(deviceInfo.paiVendorId == cdContent.vendorId,
710 : AttestationVerificationResult::kCertificationDeclarationInvalidVendorId);
711 : // The Product ID (PID) subject DN in the DAC SHALL be present in the product_id_array field in the Certification
712 : // Declaration.
713 56 : VerifyOrReturnError(cdElementsDecoder.IsProductIdIn(certDeclBuffer, deviceInfo.dacProductId),
714 : AttestationVerificationResult::kCertificationDeclarationInvalidProductId);
715 : // The Product ID (PID) subject DN in the PAI, if such a Product ID is present, SHALL match one of the values present in
716 : // the product_id_array field in the Certification Declaration.
717 55 : if (deviceInfo.paiProductId != 0) // if PAI PID is present
718 : {
719 41 : VerifyOrReturnError(cdElementsDecoder.IsProductIdIn(certDeclBuffer, deviceInfo.paiProductId),
720 : AttestationVerificationResult::kCertificationDeclarationInvalidProductId);
721 : }
722 : }
723 :
724 57 : if (cdContent.authorizedPAAListPresent)
725 : {
726 : // The Subject Key Id of the PAA SHALL match one of the values present in the authorized_paa_list
727 : // in the Certification Declaration.
728 6 : VerifyOrReturnError(cdElementsDecoder.HasAuthorizedPAA(certDeclBuffer, ByteSpan(deviceInfo.paaSKID)),
729 : AttestationVerificationResult::kCertificationDeclarationInvalidPAA);
730 : }
731 :
732 54 : if (AreVerboseLogsEnabled())
733 : {
734 2 : ChipLogProgress(NotSpecified, "Device certification declaration details:");
735 2 : ChipLogProgress(NotSpecified, "--> VID: 0x%04X", cdContent.vendorId);
736 : // TODO (https://github.com/project-chip/connectedhomeip/issues/39714): Figure out how to
737 : // log the product_id_array, which is not in cdContent.
738 2 : ChipLogProgress(NotSpecified, "--> Device type ID: " ChipLogFormatMEI, ChipLogValueMEI(cdContent.deviceTypeId));
739 2 : ChipLogProgress(NotSpecified, "--> Certification type: %d (%s)", cdContent.certificationType,
740 : CertificationTypeAsString(static_cast<CertificationType>(cdContent.certificationType)));
741 2 : if (cdContent.dacOriginVIDandPIDPresent)
742 : {
743 0 : ChipLogProgress(NotSpecified, "--> DAC origin VID: 0x%04X, PID: 0x%04X", cdContent.dacOriginVendorId,
744 : cdContent.dacOriginProductId);
745 : }
746 : }
747 :
748 54 : return AttestationVerificationResult::kSuccess;
749 : }
750 :
751 2 : CHIP_ERROR DefaultDACVerifier::VerifyNodeOperationalCSRInformation(const ByteSpan & nocsrElementsBuffer,
752 : const ByteSpan & attestationChallengeBuffer,
753 : const ByteSpan & attestationSignatureBuffer,
754 : const P256PublicKey & dacPublicKey, const ByteSpan & csrNonce)
755 : {
756 2 : VerifyOrReturnError(!nocsrElementsBuffer.empty() && !attestationChallengeBuffer.empty() &&
757 : !attestationSignatureBuffer.empty() && !csrNonce.empty(),
758 : CHIP_ERROR_INVALID_ARGUMENT);
759 :
760 2 : VerifyOrReturnError(nocsrElementsBuffer.size() <= kMaxResponseLength, CHIP_ERROR_INVALID_ARGUMENT);
761 2 : VerifyOrReturnError(csrNonce.size() == Controller::kCSRNonceLength, CHIP_ERROR_INVALID_ARGUMENT);
762 :
763 2 : ByteSpan csrSpan;
764 2 : ByteSpan csrNonceSpan;
765 2 : ByteSpan vendorReserved1Span;
766 2 : ByteSpan vendorReserved2Span;
767 2 : ByteSpan vendorReserved3Span;
768 2 : ReturnErrorOnFailure(DeconstructNOCSRElements(nocsrElementsBuffer, csrSpan, csrNonceSpan, vendorReserved1Span,
769 : vendorReserved2Span, vendorReserved3Span));
770 :
771 2 : VerifyOrReturnError(csrNonceSpan.size() == Controller::kCSRNonceLength, CHIP_ERROR_INVALID_ARGUMENT);
772 :
773 : // Verify that Nonce matches with what we sent
774 2 : VerifyOrReturnError(csrNonceSpan.data_equal(csrNonce), CHIP_ERROR_INVALID_ARGUMENT);
775 :
776 : // Validate overall attestation signature on attestation information
777 2 : P256ECDSASignature signature;
778 : // SetLength will fail if signature doesn't fit
779 2 : ReturnErrorOnFailure(signature.SetLength(attestationSignatureBuffer.size()));
780 2 : memcpy(signature.Bytes(), attestationSignatureBuffer.data(), attestationSignatureBuffer.size());
781 :
782 2 : ReturnErrorOnFailure(ValidateAttestationSignature(dacPublicKey, nocsrElementsBuffer, attestationChallengeBuffer, signature));
783 :
784 1 : return CHIP_NO_ERROR;
785 2 : }
786 :
787 0 : void DefaultDACVerifier::CheckForRevokedDACChain(const AttestationInfo & info,
788 : Callback::Callback<OnAttestationInformationVerification> * onCompletion)
789 : {
790 0 : if (mRevocationDelegate != nullptr)
791 : {
792 0 : mRevocationDelegate->CheckForRevokedDACChain(info, onCompletion);
793 : }
794 : else
795 : {
796 0 : ChipLogProgress(NotSpecified, "WARNING: No revocation delegate available. Revocation checks will be skipped!");
797 0 : onCompletion->mCall(onCompletion->mContext, info, AttestationVerificationResult::kSuccess);
798 : }
799 0 : }
800 :
801 88 : bool CsaCdKeysTrustStore::IsCdTestKey(const ByteSpan & kid) const
802 : {
803 88 : return kid.data_equal(ByteSpan{ gTestCdPubkeyKid });
804 : }
805 :
806 2 : CHIP_ERROR CsaCdKeysTrustStore::AddTrustedKey(const ByteSpan & kid, const Crypto::P256PublicKey & pubKey)
807 : {
808 2 : VerifyOrReturnError(kid.size() <= SingleKeyEntry::kMaxKidSize, CHIP_ERROR_INVALID_ARGUMENT);
809 2 : VerifyOrReturnError(!kid.empty(), CHIP_ERROR_INVALID_ARGUMENT);
810 2 : VerifyOrReturnError(mNumTrustedKeys != kMaxNumTrustedKeys, CHIP_ERROR_NO_MEMORY);
811 :
812 2 : auto & entry = mTrustedKeys[mNumTrustedKeys];
813 :
814 2 : entry.kidSize = kid.size();
815 2 : memcpy(&entry.kidBuffer[0], kid.data(), kid.size());
816 2 : entry.publicKey = pubKey;
817 :
818 2 : ++mNumTrustedKeys;
819 2 : return CHIP_NO_ERROR;
820 : }
821 :
822 2 : CHIP_ERROR CsaCdKeysTrustStore::AddTrustedKey(const ByteSpan & derCertBytes)
823 : {
824 2 : uint8_t kidBuf[Crypto::kSubjectKeyIdentifierLength] = { 0 };
825 2 : MutableByteSpan kidSpan{ kidBuf };
826 2 : P256PublicKey pubKey;
827 :
828 2 : VerifyOrReturnError(CHIP_NO_ERROR == Crypto::ExtractSKIDFromX509Cert(derCertBytes, kidSpan), CHIP_ERROR_INVALID_ARGUMENT);
829 2 : VerifyOrReturnError(CHIP_NO_ERROR == Crypto::ExtractPubkeyFromX509Cert(derCertBytes, pubKey), CHIP_ERROR_INVALID_ARGUMENT);
830 :
831 2 : if (!IsCdTestKey(kidSpan))
832 : {
833 : // Verify cert against CSA CD root of trust.
834 : CertificateChainValidationResult chainValidationResult;
835 2 : VerifyOrReturnError(CHIP_NO_ERROR ==
836 : ValidateCertificateChain(gCdRootCert, sizeof(gCdRootCert), nullptr, 0, derCertBytes.data(),
837 : derCertBytes.size(), chainValidationResult),
838 : CHIP_ERROR_INVALID_ARGUMENT);
839 1 : VerifyOrReturnError(chainValidationResult == CertificateChainValidationResult::kSuccess, CHIP_ERROR_INVALID_ARGUMENT);
840 : }
841 :
842 1 : return AddTrustedKey(kidSpan, pubKey);
843 2 : }
844 :
845 88 : CHIP_ERROR CsaCdKeysTrustStore::LookupVerifyingKey(const ByteSpan & kid, Crypto::P256PublicKey & outPubKey) const
846 : {
847 : // First, search for the well known keys
848 106 : for (auto & cdSigningKey : gCdSigningKeys)
849 : {
850 103 : if (kid.data_equal(cdSigningKey.mKid))
851 : {
852 85 : outPubKey = cdSigningKey.mPubkey;
853 85 : return CHIP_NO_ERROR;
854 : }
855 : }
856 :
857 : // Seconds, search externally added keys
858 3 : for (size_t keyIdx = 0; keyIdx < mNumTrustedKeys; keyIdx++)
859 : {
860 1 : auto & entry = mTrustedKeys[keyIdx];
861 1 : if (kid.data_equal(entry.GetKid()))
862 : {
863 1 : outPubKey = entry.publicKey;
864 1 : return CHIP_NO_ERROR;
865 : }
866 : }
867 :
868 : // If we get here, the desired key was not found
869 2 : return CHIP_ERROR_KEY_NOT_FOUND;
870 : }
871 :
872 5 : const AttestationTrustStore * GetTestAttestationTrustStore()
873 : {
874 5 : return &gTestAttestationTrustStore.get();
875 : }
876 :
877 4 : DeviceAttestationVerifier * GetDefaultDACVerifier(const AttestationTrustStore * paaRootStore,
878 : DeviceAttestationRevocationDelegate * revocationDelegate)
879 : {
880 4 : static DefaultDACVerifier defaultDACVerifier{ paaRootStore, revocationDelegate };
881 :
882 4 : return &defaultDACVerifier;
883 : }
884 :
885 : } // namespace Credentials
886 : } // namespace chip
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