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 : } // namespace
314 :
315 153 : void DefaultDACVerifier::VerifyAttestationInformation(const DeviceAttestationVerifier::AttestationInfo & info,
316 : Callback::Callback<OnAttestationInformationVerification> * onCompletion)
317 : {
318 153 : AttestationVerificationResult attestationError = AttestationVerificationResult::kSuccess;
319 :
320 153 : Platform::ScopedMemoryBuffer<uint8_t> paaCert;
321 153 : MutableByteSpan paaDerBuffer;
322 153 : AttestationCertVidPid dacVidPid;
323 153 : AttestationCertVidPid paiVidPid;
324 153 : AttestationCertVidPid paaVidPid;
325 :
326 153 : VerifyOrExit(!info.attestationElementsBuffer.empty() && !info.attestationChallengeBuffer.empty() &&
327 : !info.attestationSignatureBuffer.empty() && !info.dacDerBuffer.empty() &&
328 : !info.attestationNonceBuffer.empty() && onCompletion != nullptr,
329 : attestationError = AttestationVerificationResult::kInvalidArgument);
330 :
331 153 : VerifyOrExit(info.attestationElementsBuffer.size() <= kMaxResponseLength,
332 : attestationError = AttestationVerificationResult::kInvalidArgument);
333 :
334 : // Ensure PAI is present
335 153 : VerifyOrExit(!info.paiDerBuffer.empty(), attestationError = AttestationVerificationResult::kPaiMissing);
336 :
337 : // Validate Proper Certificate Format
338 : {
339 153 : VerifyOrExit(VerifyAttestationCertificateFormat(info.paiDerBuffer, AttestationCertType::kPAI) == CHIP_NO_ERROR,
340 : attestationError = AttestationVerificationResult::kPaiFormatInvalid);
341 135 : VerifyOrExit(VerifyAttestationCertificateFormat(info.dacDerBuffer, AttestationCertType::kDAC) == CHIP_NO_ERROR,
342 : attestationError = AttestationVerificationResult::kDacFormatInvalid);
343 : }
344 :
345 : // match DAC and PAI VIDs
346 : {
347 116 : VerifyOrExit(ExtractVIDPIDFromX509Cert(info.dacDerBuffer, dacVidPid) == CHIP_NO_ERROR,
348 : attestationError = AttestationVerificationResult::kDacFormatInvalid);
349 109 : VerifyOrExit(ExtractVIDPIDFromX509Cert(info.paiDerBuffer, paiVidPid) == CHIP_NO_ERROR,
350 : attestationError = AttestationVerificationResult::kPaiFormatInvalid);
351 102 : VerifyOrExit(paiVidPid.mVendorId.HasValue() && paiVidPid.mVendorId == dacVidPid.mVendorId,
352 : attestationError = AttestationVerificationResult::kDacVendorIdMismatch);
353 93 : VerifyOrExit(dacVidPid.mProductId.HasValue(), attestationError = AttestationVerificationResult::kDacProductIdMismatch);
354 93 : if (paiVidPid.mProductId.HasValue())
355 : {
356 71 : VerifyOrExit(paiVidPid.mProductId == dacVidPid.mProductId,
357 : attestationError = AttestationVerificationResult::kDacProductIdMismatch);
358 : }
359 : }
360 :
361 : {
362 93 : P256PublicKey remoteManufacturerPubkey;
363 93 : P256ECDSASignature deviceSignature;
364 :
365 93 : VerifyOrExit(ExtractPubkeyFromX509Cert(info.dacDerBuffer, remoteManufacturerPubkey) == CHIP_NO_ERROR,
366 : attestationError = AttestationVerificationResult::kDacFormatInvalid);
367 :
368 : // Validate overall attestation signature on attestation information
369 : // SetLength will fail if signature doesn't fit
370 93 : VerifyOrExit(deviceSignature.SetLength(info.attestationSignatureBuffer.size()) == CHIP_NO_ERROR,
371 : attestationError = AttestationVerificationResult::kAttestationSignatureInvalidFormat);
372 93 : memcpy(deviceSignature.Bytes(), info.attestationSignatureBuffer.data(), info.attestationSignatureBuffer.size());
373 93 : VerifyOrExit(ValidateAttestationSignature(remoteManufacturerPubkey, info.attestationElementsBuffer,
374 : info.attestationChallengeBuffer, deviceSignature) == CHIP_NO_ERROR,
375 : attestationError = AttestationVerificationResult::kAttestationSignatureInvalid);
376 93 : }
377 :
378 : {
379 : uint8_t akidBuf[Crypto::kAuthorityKeyIdentifierLength];
380 93 : MutableByteSpan akid(akidBuf);
381 93 : constexpr size_t paaCertAllocatedLen = kMaxDERCertLength;
382 93 : CHIP_ERROR err = CHIP_NO_ERROR;
383 :
384 95 : VerifyOrExit(ExtractAKIDFromX509Cert(info.paiDerBuffer, akid) == CHIP_NO_ERROR,
385 : attestationError = AttestationVerificationResult::kPaiFormatInvalid);
386 :
387 93 : VerifyOrExit(paaCert.Alloc(paaCertAllocatedLen), attestationError = AttestationVerificationResult::kNoMemory);
388 :
389 93 : paaDerBuffer = MutableByteSpan(paaCert.Get(), paaCertAllocatedLen);
390 93 : err = mAttestationTrustStore->GetProductAttestationAuthorityCert(akid, paaDerBuffer);
391 93 : if (err == CHIP_ERROR_NOT_IMPLEMENTED)
392 : {
393 0 : err = gTestAttestationTrustStore->GetProductAttestationAuthorityCert(akid, paaDerBuffer);
394 : }
395 :
396 93 : if (err != CHIP_NO_ERROR)
397 : {
398 1 : attestationError = AttestationVerificationResult::kPaaNotFound;
399 : // Log the unmatched AKID in the format the DCL uses: Uppercase hex, with bytes
400 : // separated by ':'. That means three chars per byte (2 hex digits and ':') except for
401 : // the last byte. If we use a StringBuilder sized to 3 chars per byte, that won't allow
402 : // us to write the last ':' (since it uses that char for the null terminator), but
403 : // that's exactly what we want.
404 1 : StringBuilder<Crypto::kAuthorityKeyIdentifierLength * 3> akidStringBuilder;
405 21 : for (uint8_t byte : akid)
406 : {
407 20 : akidStringBuilder.AddFormat("%02X", byte).Add(":");
408 : }
409 1 : ChipLogError(NotSpecified, "Unable to find PAA, err: %" CHIP_ERROR_FORMAT ", AKID: %s", err.Format(),
410 : akidStringBuilder.c_str());
411 1 : ExitNow();
412 : }
413 :
414 92 : VerifyOrExit(ExtractVIDPIDFromX509Cert(paaDerBuffer, paaVidPid) == CHIP_NO_ERROR,
415 : attestationError = AttestationVerificationResult::kPaaFormatInvalid);
416 :
417 92 : if (paaVidPid.mVendorId.HasValue())
418 : {
419 91 : VerifyOrExit(paaVidPid.mVendorId == paiVidPid.mVendorId,
420 : attestationError = AttestationVerificationResult::kPaiVendorIdMismatch);
421 : }
422 :
423 91 : VerifyOrExit(!paaVidPid.mProductId.HasValue(), attestationError = AttestationVerificationResult::kPaaFormatInvalid);
424 : }
425 :
426 : #if !defined(CURRENT_TIME_NOT_IMPLEMENTED)
427 91 : VerifyOrExit(IsCertificateValidAtCurrentTime(info.dacDerBuffer) == CHIP_NO_ERROR,
428 : attestationError = AttestationVerificationResult::kDacExpired);
429 : #endif
430 :
431 : CertificateChainValidationResult chainValidationResult;
432 87 : VerifyOrExit(ValidateCertificateChain(paaDerBuffer.data(), paaDerBuffer.size(), info.paiDerBuffer.data(),
433 : info.paiDerBuffer.size(), info.dacDerBuffer.data(), info.dacDerBuffer.size(),
434 : chainValidationResult) == CHIP_NO_ERROR,
435 : attestationError = MapError(chainValidationResult));
436 :
437 : {
438 87 : ByteSpan certificationDeclarationSpan;
439 87 : ByteSpan attestationNonceSpan;
440 : uint32_t timestampDeconstructed;
441 87 : ByteSpan firmwareInfoSpan;
442 87 : DeviceAttestationVendorReservedDeconstructor vendorReserved;
443 87 : ByteSpan certificationDeclarationPayload;
444 :
445 87 : DeviceInfoForAttestation deviceInfo{
446 87 : .vendorId = info.vendorId,
447 87 : .productId = info.productId,
448 174 : .dacVendorId = dacVidPid.mVendorId.Value(),
449 174 : .dacProductId = dacVidPid.mProductId.Value(),
450 174 : .paiVendorId = paiVidPid.mVendorId.Value(),
451 174 : .paiProductId = paiVidPid.mProductId.ValueOr(0),
452 174 : .paaVendorId = paaVidPid.mVendorId.ValueOr(VendorId::NotSpecified),
453 87 : };
454 :
455 87 : MutableByteSpan paaSKID(deviceInfo.paaSKID);
456 121 : VerifyOrExit(ExtractSKIDFromX509Cert(paaDerBuffer, paaSKID) == CHIP_NO_ERROR,
457 : attestationError = AttestationVerificationResult::kPaaFormatInvalid);
458 87 : VerifyOrExit(paaSKID.size() == sizeof(deviceInfo.paaSKID),
459 : attestationError = AttestationVerificationResult::kPaaFormatInvalid);
460 :
461 87 : VerifyOrExit(DeconstructAttestationElements(info.attestationElementsBuffer, certificationDeclarationSpan,
462 : attestationNonceSpan, timestampDeconstructed, firmwareInfoSpan,
463 : vendorReserved) == CHIP_NO_ERROR,
464 : attestationError = AttestationVerificationResult::kAttestationElementsMalformed);
465 :
466 : // Verify that Nonce matches with what we sent
467 87 : VerifyOrExit(attestationNonceSpan.data_equal(info.attestationNonceBuffer),
468 : attestationError = AttestationVerificationResult::kAttestationNonceMismatch);
469 :
470 87 : attestationError = ValidateCertificationDeclarationSignature(certificationDeclarationSpan, certificationDeclarationPayload);
471 87 : VerifyOrExit(attestationError == AttestationVerificationResult::kSuccess, attestationError = attestationError);
472 :
473 79 : attestationError = ValidateCertificateDeclarationPayload(certificationDeclarationPayload, firmwareInfoSpan, deviceInfo);
474 79 : VerifyOrExit(attestationError == AttestationVerificationResult::kSuccess, attestationError = attestationError);
475 : }
476 :
477 153 : exit:
478 153 : onCompletion->mCall(onCompletion->mContext, info, attestationError);
479 153 : }
480 :
481 88 : AttestationVerificationResult DefaultDACVerifier::ValidateCertificationDeclarationSignature(const ByteSpan & cmsEnvelopeBuffer,
482 : ByteSpan & certDeclBuffer)
483 : {
484 88 : ByteSpan kid;
485 88 : VerifyOrReturnError(CMS_ExtractKeyId(cmsEnvelopeBuffer, kid) == CHIP_NO_ERROR,
486 : AttestationVerificationResult::kCertificationDeclarationNoKeyId);
487 :
488 85 : Crypto::P256PublicKey verifyingKey;
489 85 : CHIP_ERROR err = mCdKeysTrustStore.LookupVerifyingKey(kid, verifyingKey);
490 85 : VerifyOrReturnError(err == CHIP_NO_ERROR, AttestationVerificationResult::kCertificationDeclarationNoCertificateFound);
491 :
492 : // Disallow test key if support not enabled
493 84 : if (mCdKeysTrustStore.IsCdTestKey(kid) && !IsCdTestKeySupported())
494 : {
495 0 : return AttestationVerificationResult::kCertificationDeclarationNoCertificateFound;
496 : }
497 :
498 84 : VerifyOrReturnError(CMS_Verify(cmsEnvelopeBuffer, verifyingKey, certDeclBuffer) == CHIP_NO_ERROR,
499 : AttestationVerificationResult::kCertificationDeclarationInvalidSignature);
500 :
501 80 : return AttestationVerificationResult::kSuccess;
502 85 : }
503 :
504 80 : AttestationVerificationResult DefaultDACVerifier::ValidateCertificateDeclarationPayload(const ByteSpan & certDeclBuffer,
505 : const ByteSpan & firmwareInfo,
506 : const DeviceInfoForAttestation & deviceInfo)
507 : {
508 80 : CertificationElementsWithoutPIDs cdContent;
509 80 : CertificationElementsDecoder cdElementsDecoder;
510 80 : VerifyOrReturnError(DecodeCertificationElements(certDeclBuffer, cdContent) == CHIP_NO_ERROR,
511 : AttestationVerificationResult::kCertificationDeclarationInvalidFormat);
512 :
513 68 : if (!firmwareInfo.empty())
514 : {
515 : // TODO: validate contents based on DCL
516 : }
517 :
518 : // Verify the cd elements are as required by the spec
519 : // security_level, security_information are meant to be ignored. version_number is not meant to be interpreted by the
520 : // commissioners.
521 68 : if (cdContent.formatVersion != 1 || cdContent.certificationType >= chip::to_underlying(CertificationType::kReserved))
522 : {
523 2 : return AttestationVerificationResult::kAttestationElementsMalformed;
524 : }
525 :
526 : // The vendor_id field in the Certification Declaration SHALL match the VendorID attribute found in the Basic Information
527 : // cluster
528 66 : VerifyOrReturnError(cdContent.vendorId == deviceInfo.vendorId,
529 : AttestationVerificationResult::kCertificationDeclarationInvalidVendorId);
530 :
531 : // The product_id_array field in the Certification Declaration SHALL contain the value of the ProductID attribute found in
532 : // the Basic Information cluster.
533 65 : VerifyOrReturnError(cdElementsDecoder.IsProductIdIn(certDeclBuffer, deviceInfo.productId),
534 : AttestationVerificationResult::kCertificationDeclarationInvalidProductId);
535 :
536 60 : if (cdContent.dacOriginVIDandPIDPresent)
537 : {
538 : // The Vendor ID (VID) subject DN in the DAC SHALL match the dac_origin_vendor_id field in the Certification
539 : // Declaration.
540 4 : VerifyOrReturnError(deviceInfo.dacVendorId == cdContent.dacOriginVendorId,
541 : AttestationVerificationResult::kCertificationDeclarationInvalidVendorId);
542 : // The Vendor ID (VID) subject DN in the PAI SHALL match the dac_origin_vendor_id field in the Certification
543 : // Declaration.
544 2 : VerifyOrReturnError(deviceInfo.paiVendorId == cdContent.dacOriginVendorId,
545 : AttestationVerificationResult::kCertificationDeclarationInvalidVendorId);
546 : // The Product ID (PID) subject DN in the DAC SHALL match the dac_origin_product_id field in the Certification
547 : // Declaration.
548 2 : VerifyOrReturnError(deviceInfo.dacProductId == cdContent.dacOriginProductId,
549 : AttestationVerificationResult::kCertificationDeclarationInvalidProductId);
550 : // The Product ID (PID) subject DN in the PAI, if such a Product ID is present, SHALL match the dac_origin_product_id
551 : // field in the Certification Declaration.
552 2 : if (deviceInfo.paiProductId != 0) // if PAI PID is present
553 : {
554 2 : VerifyOrReturnError(deviceInfo.paiProductId == cdContent.dacOriginProductId,
555 : AttestationVerificationResult::kCertificationDeclarationInvalidProductId);
556 : }
557 : }
558 : else
559 : {
560 : // The Vendor ID (VID) subject DN in the DAC SHALL match the vendor_id field in the Certification Declaration
561 56 : VerifyOrReturnError(deviceInfo.dacVendorId == cdContent.vendorId,
562 : AttestationVerificationResult::kCertificationDeclarationInvalidVendorId);
563 : // The Vendor ID (VID) subject DN in the PAI SHALL match the vendor_id field in the Certification Declaration.
564 56 : VerifyOrReturnError(deviceInfo.paiVendorId == cdContent.vendorId,
565 : AttestationVerificationResult::kCertificationDeclarationInvalidVendorId);
566 : // The Product ID (PID) subject DN in the DAC SHALL be present in the product_id_array field in the Certification
567 : // Declaration.
568 56 : VerifyOrReturnError(cdElementsDecoder.IsProductIdIn(certDeclBuffer, deviceInfo.dacProductId),
569 : AttestationVerificationResult::kCertificationDeclarationInvalidProductId);
570 : // The Product ID (PID) subject DN in the PAI, if such a Product ID is present, SHALL match one of the values present in
571 : // the product_id_array field in the Certification Declaration.
572 55 : if (deviceInfo.paiProductId != 0) // if PAI PID is present
573 : {
574 41 : VerifyOrReturnError(cdElementsDecoder.IsProductIdIn(certDeclBuffer, deviceInfo.paiProductId),
575 : AttestationVerificationResult::kCertificationDeclarationInvalidProductId);
576 : }
577 : }
578 :
579 57 : if (cdContent.authorizedPAAListPresent)
580 : {
581 : // The Subject Key Id of the PAA SHALL match one of the values present in the authorized_paa_list
582 : // in the Certification Declaration.
583 6 : VerifyOrReturnError(cdElementsDecoder.HasAuthorizedPAA(certDeclBuffer, ByteSpan(deviceInfo.paaSKID)),
584 : AttestationVerificationResult::kCertificationDeclarationInvalidPAA);
585 : }
586 :
587 54 : return AttestationVerificationResult::kSuccess;
588 : }
589 :
590 2 : CHIP_ERROR DefaultDACVerifier::VerifyNodeOperationalCSRInformation(const ByteSpan & nocsrElementsBuffer,
591 : const ByteSpan & attestationChallengeBuffer,
592 : const ByteSpan & attestationSignatureBuffer,
593 : const P256PublicKey & dacPublicKey, const ByteSpan & csrNonce)
594 : {
595 2 : VerifyOrReturnError(!nocsrElementsBuffer.empty() && !attestationChallengeBuffer.empty() &&
596 : !attestationSignatureBuffer.empty() && !csrNonce.empty(),
597 : CHIP_ERROR_INVALID_ARGUMENT);
598 :
599 2 : VerifyOrReturnError(nocsrElementsBuffer.size() <= kMaxResponseLength, CHIP_ERROR_INVALID_ARGUMENT);
600 2 : VerifyOrReturnError(csrNonce.size() == Controller::kCSRNonceLength, CHIP_ERROR_INVALID_ARGUMENT);
601 :
602 2 : ByteSpan csrSpan;
603 2 : ByteSpan csrNonceSpan;
604 2 : ByteSpan vendorReserved1Span;
605 2 : ByteSpan vendorReserved2Span;
606 2 : ByteSpan vendorReserved3Span;
607 2 : ReturnErrorOnFailure(DeconstructNOCSRElements(nocsrElementsBuffer, csrSpan, csrNonceSpan, vendorReserved1Span,
608 : vendorReserved2Span, vendorReserved3Span));
609 :
610 2 : VerifyOrReturnError(csrNonceSpan.size() == Controller::kCSRNonceLength, CHIP_ERROR_INVALID_ARGUMENT);
611 :
612 : // Verify that Nonce matches with what we sent
613 2 : VerifyOrReturnError(csrNonceSpan.data_equal(csrNonce), CHIP_ERROR_INVALID_ARGUMENT);
614 :
615 : // Validate overall attestation signature on attestation information
616 2 : P256ECDSASignature signature;
617 : // SetLength will fail if signature doesn't fit
618 2 : ReturnErrorOnFailure(signature.SetLength(attestationSignatureBuffer.size()));
619 2 : memcpy(signature.Bytes(), attestationSignatureBuffer.data(), attestationSignatureBuffer.size());
620 :
621 2 : ReturnErrorOnFailure(ValidateAttestationSignature(dacPublicKey, nocsrElementsBuffer, attestationChallengeBuffer, signature));
622 :
623 1 : return CHIP_NO_ERROR;
624 2 : }
625 :
626 0 : void DefaultDACVerifier::CheckForRevokedDACChain(const AttestationInfo & info,
627 : Callback::Callback<OnAttestationInformationVerification> * onCompletion)
628 : {
629 0 : if (mRevocationDelegate != nullptr)
630 : {
631 0 : mRevocationDelegate->CheckForRevokedDACChain(info, onCompletion);
632 : }
633 : else
634 : {
635 0 : onCompletion->mCall(onCompletion->mContext, info, AttestationVerificationResult::kSuccess);
636 : }
637 0 : }
638 :
639 88 : bool CsaCdKeysTrustStore::IsCdTestKey(const ByteSpan & kid) const
640 : {
641 88 : return kid.data_equal(ByteSpan{ gTestCdPubkeyKid });
642 : }
643 :
644 2 : CHIP_ERROR CsaCdKeysTrustStore::AddTrustedKey(const ByteSpan & kid, const Crypto::P256PublicKey & pubKey)
645 : {
646 2 : VerifyOrReturnError(kid.size() <= SingleKeyEntry::kMaxKidSize, CHIP_ERROR_INVALID_ARGUMENT);
647 2 : VerifyOrReturnError(!kid.empty(), CHIP_ERROR_INVALID_ARGUMENT);
648 2 : VerifyOrReturnError(mNumTrustedKeys != kMaxNumTrustedKeys, CHIP_ERROR_NO_MEMORY);
649 :
650 2 : auto & entry = mTrustedKeys[mNumTrustedKeys];
651 :
652 2 : entry.kidSize = kid.size();
653 2 : memcpy(&entry.kidBuffer[0], kid.data(), kid.size());
654 2 : entry.publicKey = pubKey;
655 :
656 2 : ++mNumTrustedKeys;
657 2 : return CHIP_NO_ERROR;
658 : }
659 :
660 2 : CHIP_ERROR CsaCdKeysTrustStore::AddTrustedKey(const ByteSpan & derCertBytes)
661 : {
662 2 : uint8_t kidBuf[Crypto::kSubjectKeyIdentifierLength] = { 0 };
663 2 : MutableByteSpan kidSpan{ kidBuf };
664 2 : P256PublicKey pubKey;
665 :
666 2 : VerifyOrReturnError(CHIP_NO_ERROR == Crypto::ExtractSKIDFromX509Cert(derCertBytes, kidSpan), CHIP_ERROR_INVALID_ARGUMENT);
667 2 : VerifyOrReturnError(CHIP_NO_ERROR == Crypto::ExtractPubkeyFromX509Cert(derCertBytes, pubKey), CHIP_ERROR_INVALID_ARGUMENT);
668 :
669 2 : if (!IsCdTestKey(kidSpan))
670 : {
671 : // Verify cert against CSA CD root of trust.
672 : CertificateChainValidationResult chainValidationResult;
673 2 : VerifyOrReturnError(CHIP_NO_ERROR ==
674 : ValidateCertificateChain(gCdRootCert, sizeof(gCdRootCert), nullptr, 0, derCertBytes.data(),
675 : derCertBytes.size(), chainValidationResult),
676 : CHIP_ERROR_INVALID_ARGUMENT);
677 1 : VerifyOrReturnError(chainValidationResult == CertificateChainValidationResult::kSuccess, CHIP_ERROR_INVALID_ARGUMENT);
678 : }
679 :
680 1 : return AddTrustedKey(kidSpan, pubKey);
681 2 : }
682 :
683 88 : CHIP_ERROR CsaCdKeysTrustStore::LookupVerifyingKey(const ByteSpan & kid, Crypto::P256PublicKey & outPubKey) const
684 : {
685 : // First, search for the well known keys
686 106 : for (auto & cdSigningKey : gCdSigningKeys)
687 : {
688 103 : if (kid.data_equal(cdSigningKey.mKid))
689 : {
690 85 : outPubKey = cdSigningKey.mPubkey;
691 85 : return CHIP_NO_ERROR;
692 : }
693 : }
694 :
695 : // Seconds, search externally added keys
696 3 : for (size_t keyIdx = 0; keyIdx < mNumTrustedKeys; keyIdx++)
697 : {
698 1 : auto & entry = mTrustedKeys[keyIdx];
699 1 : if (kid.data_equal(entry.GetKid()))
700 : {
701 1 : outPubKey = entry.publicKey;
702 1 : return CHIP_NO_ERROR;
703 : }
704 : }
705 :
706 : // If we get here, the desired key was not found
707 2 : return CHIP_ERROR_KEY_NOT_FOUND;
708 : }
709 :
710 5 : const AttestationTrustStore * GetTestAttestationTrustStore()
711 : {
712 5 : return &gTestAttestationTrustStore.get();
713 : }
714 :
715 4 : DeviceAttestationVerifier * GetDefaultDACVerifier(const AttestationTrustStore * paaRootStore,
716 : DeviceAttestationRevocationDelegate * revocationDelegate)
717 : {
718 4 : static DefaultDACVerifier defaultDACVerifier{ paaRootStore, revocationDelegate };
719 :
720 4 : return &defaultDACVerifier;
721 : }
722 :
723 : } // namespace Credentials
724 : } // namespace chip
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