/*

 *

 *    Copyright (c) 2021-2022 Project CHIP Authors

 *

 *    Licensed under the Apache License, Version 2.0 (the "License");

 *    you may not use this file except in compliance with the License.

 *    You may obtain a copy of the License at

 *

 *        http://www.apache.org/licenses/LICENSE-2.0

 *

 *    Unless required by applicable law or agreed to in writing, software

 *    distributed under the License is distributed on an "AS IS" BASIS,

 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 *    See the License for the specific language governing permissions and

 *    limitations under the License.

 */

#include "DefaultDeviceAttestationVerifier.h"

#include <controller/OperationalCredentialsDelegate.h>

#include <credentials/CHIPCert.h>

#include <credentials/CertificationDeclaration.h>

#include <credentials/DeviceAttestationConstructor.h>

#include <credentials/DeviceAttestationVendorReserved.h>

#include <credentials/attestation_verifier/TestPAAStore.h>

#include <crypto/CHIPCryptoPAL.h>

#include <lib/asn1/ASN1.h>

#include <lib/core/CHIPError.h>

#include <lib/core/Global.h>

#include <lib/support/CodeUtils.h>

#include <lib/support/ScopedMemoryBuffer.h>

#include <lib/support/Span.h>

#include <lib/support/StringBuilder.h>

#include <lib/support/logging/CHIPLogging.h>

using namespace chip::Crypto;

using chip::TestCerts::GetTestPaaRootStore;

namespace chip {

namespace Credentials {

namespace {

// As per specifications section 11.22.5.1. Constant RESP_MAX

constexpr size_t kMaxResponseLength = 900;

// Test CD Signing Key from `credentials/test/certification-declaration/Chip-Test-CD-Signing-Cert.pem`

// used to verify any in-SDK development CDs. The associated keypair to do actual signing is in

// `credentials/test/certification-declaration/Chip-Test-CD-Signing-Key.pem`.

//

// Note that this certificate is a self signed certificate and doesn't chain up to the CSA trusted root.

// This CD Signing certificate can only be used to sign CDs for testing/development purposes

// and should never be used in production devices.

//

// -----BEGIN CERTIFICATE-----

// MIIBszCCAVqgAwIBAgIIRdrzneR6oI8wCgYIKoZIzj0EAwIwKzEpMCcGA1UEAwwg

// TWF0dGVyIFRlc3QgQ0QgU2lnbmluZyBBdXRob3JpdHkwIBcNMjEwNjI4MTQyMzQz

// WhgPOTk5OTEyMzEyMzU5NTlaMCsxKTAnBgNVBAMMIE1hdHRlciBUZXN0IENEIFNp

// Z25pbmcgQXV0aG9yaXR5MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEPDmJIkUr

// VcrzicJb0bykZWlSzLkOiGkkmthHRlMBTL+V1oeWXgNrUhxRA35rjO3vyh60QEZp

// T6CIgu7WUZ3suqNmMGQwEgYDVR0TAQH/BAgwBgEB/wIBATAOBgNVHQ8BAf8EBAMC

// AQYwHQYDVR0OBBYEFGL6gjNZrPqplj4c+hQK3fUE83FgMB8GA1UdIwQYMBaAFGL6

// gjNZrPqplj4c+hQK3fUE83FgMAoGCCqGSM49BAMCA0cAMEQCICxUXOTkV9im8NnZ

// u+vW7OHd/n+MbZps83UyH8b6xxOEAiBUB3jodDlyUn7t669YaGIgtUB48s1OYqdq

// 58u5L/VMiw==

// -----END CERTIFICATE-----

//

constexpr uint8_t gTestCdPubkeyBytes[] = {

    0x04, 0x3c, 0x39, 0x89, 0x22, 0x45, 0x2b, 0x55, 0xca, 0xf3, 0x89, 0xc2, 0x5b, 0xd1, 0xbc, 0xa4, 0x65,

    0x69, 0x52, 0xcc, 0xb9, 0x0e, 0x88, 0x69, 0x24, 0x9a, 0xd8, 0x47, 0x46, 0x53, 0x01, 0x4c, 0xbf, 0x95,

    0xd6, 0x87, 0x96, 0x5e, 0x03, 0x6b, 0x52, 0x1c, 0x51, 0x03, 0x7e, 0x6b, 0x8c, 0xed, 0xef, 0xca, 0x1e,

    0xb4, 0x40, 0x46, 0x69, 0x4f, 0xa0, 0x88, 0x82, 0xee, 0xd6, 0x51, 0x9d, 0xec, 0xba,

};

constexpr uint8_t gTestCdPubkeyKid[] = {

    0x62, 0xfa, 0x82, 0x33, 0x59, 0xac, 0xfa, 0xa9, 0x96, 0x3e, 0x1c, 0xfa, 0x14, 0x0a, 0xdd, 0xf5, 0x04, 0xf3, 0x71, 0x60,

};

// Official CSA "Matter Certification and Testing CA"

//

// -----BEGIN CERTIFICATE-----

// MIICATCCAaegAwIBAgIHY3Nhcm9vdDAKBggqhkjOPQQDAjBSMQwwCgYDVQQKDAND

// U0ExLDAqBgNVBAMMI01hdHRlciBDZXJ0aWZpY2F0aW9uIGFuZCBUZXN0aW5nIENB

// MRQwEgYKKwYBBAGConwCAQwEQzVBMDAgFw0yMjA3MDcxOTI4MDRaGA8yMTIyMDYx

// MzE5MjgwNFowUjEMMAoGA1UECgwDQ1NBMSwwKgYDVQQDDCNNYXR0ZXIgQ2VydGlm

// aWNhdGlvbiBhbmQgVGVzdGluZyBDQTEUMBIGCisGAQQBgqJ8AgEMBEM1QTAwWTAT

// BgcqhkjOPQIBBggqhkjOPQMBBwNCAAQ4SjrDql2+y3IP5iEdPK1IYm/3EaCkkp+t

// 2GD44nf/wN4fPrYzejSEe1o6BW6ocQ6Td+7t7iUXA/3ZNQEly45Io2YwZDASBgNV

// HRMBAf8ECDAGAQH/AgEBMA4GA1UdDwEB/wQEAwIBBjAdBgNVHQ4EFgQUl+Rp0MUE

// FMJvxwH3fpR3OQmN9qUwHwYDVR0jBBgwFoAUl+Rp0MUEFMJvxwH3fpR3OQmN9qUw

// CgYIKoZIzj0EAwIDSAAwRQIgearlB0fCJ49UoJ6xwKPdlPEopCOL9jVCviODEleI

// +mQCIQDvvDCKi7kvj4R4BoFS4BVZGCk4zJ84W4tfTTfu89lRbQ==

// -----END CERTIFICATE-----

//

constexpr uint8_t gCdRootCert[] = {

    0x30, 0x82, 0x02, 0x01, 0x30, 0x82, 0x01, 0xa7, 0xa0, 0x03, 0x02, 0x01, 0x02, 0x02, 0x07, 0x63, 0x73, 0x61, 0x72, 0x6f, 0x6f,

    0x74, 0x30, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x04, 0x03, 0x02, 0x30, 0x52, 0x31, 0x0c, 0x30, 0x0a, 0x06, 0x03,

    0x55, 0x04, 0x0a, 0x0c, 0x03, 0x43, 0x53, 0x41, 0x31, 0x2c, 0x30, 0x2a, 0x06, 0x03, 0x55, 0x04, 0x03, 0x0c, 0x23, 0x4d, 0x61,

    0x74, 0x74, 0x65, 0x72, 0x20, 0x43, 0x65, 0x72, 0x74, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x61, 0x6e,

    0x64, 0x20, 0x54, 0x65, 0x73, 0x74, 0x69, 0x6e, 0x67, 0x20, 0x43, 0x41, 0x31, 0x14, 0x30, 0x12, 0x06, 0x0a, 0x2b, 0x06, 0x01,

    0x04, 0x01, 0x82, 0xa2, 0x7c, 0x02, 0x01, 0x0c, 0x04, 0x43, 0x35, 0x41, 0x30, 0x30, 0x20, 0x17, 0x0d, 0x32, 0x32, 0x30, 0x37,

    0x30, 0x37, 0x31, 0x39, 0x32, 0x38, 0x30, 0x34, 0x5a, 0x18, 0x0f, 0x32, 0x31, 0x32, 0x32, 0x30, 0x36, 0x31, 0x33, 0x31, 0x39,

    0x32, 0x38, 0x30, 0x34, 0x5a, 0x30, 0x52, 0x31, 0x0c, 0x30, 0x0a, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x0c, 0x03, 0x43, 0x53, 0x41,

    0x31, 0x2c, 0x30, 0x2a, 0x06, 0x03, 0x55, 0x04, 0x03, 0x0c, 0x23, 0x4d, 0x61, 0x74, 0x74, 0x65, 0x72, 0x20, 0x43, 0x65, 0x72,

    0x74, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x61, 0x6e, 0x64, 0x20, 0x54, 0x65, 0x73, 0x74, 0x69, 0x6e,

    0x67, 0x20, 0x43, 0x41, 0x31, 0x14, 0x30, 0x12, 0x06, 0x0a, 0x2b, 0x06, 0x01, 0x04, 0x01, 0x82, 0xa2, 0x7c, 0x02, 0x01, 0x0c,

    0x04, 0x43, 0x35, 0x41, 0x30, 0x30, 0x59, 0x30, 0x13, 0x06, 0x07, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x02, 0x01, 0x06, 0x08, 0x2a,

    0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, 0x03, 0x42, 0x00, 0x04, 0x38, 0x4a, 0x3a, 0xc3, 0xaa, 0x5d, 0xbe, 0xcb, 0x72, 0x0f,

    0xe6, 0x21, 0x1d, 0x3c, 0xad, 0x48, 0x62, 0x6f, 0xf7, 0x11, 0xa0, 0xa4, 0x92, 0x9f, 0xad, 0xd8, 0x60, 0xf8, 0xe2, 0x77, 0xff,

    0xc0, 0xde, 0x1f, 0x3e, 0xb6, 0x33, 0x7a, 0x34, 0x84, 0x7b, 0x5a, 0x3a, 0x05, 0x6e, 0xa8, 0x71, 0x0e, 0x93, 0x77, 0xee, 0xed,

    0xee, 0x25, 0x17, 0x03, 0xfd, 0xd9, 0x35, 0x01, 0x25, 0xcb, 0x8e, 0x48, 0xa3, 0x66, 0x30, 0x64, 0x30, 0x12, 0x06, 0x03, 0x55,

    0x1d, 0x13, 0x01, 0x01, 0xff, 0x04, 0x08, 0x30, 0x06, 0x01, 0x01, 0xff, 0x02, 0x01, 0x01, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x1d,

    0x0f, 0x01, 0x01, 0xff, 0x04, 0x04, 0x03, 0x02, 0x01, 0x06, 0x30, 0x1d, 0x06, 0x03, 0x55, 0x1d, 0x0e, 0x04, 0x16, 0x04, 0x14,

    0x97, 0xe4, 0x69, 0xd0, 0xc5, 0x04, 0x14, 0xc2, 0x6f, 0xc7, 0x01, 0xf7, 0x7e, 0x94, 0x77, 0x39, 0x09, 0x8d, 0xf6, 0xa5, 0x30,

    0x1f, 0x06, 0x03, 0x55, 0x1d, 0x23, 0x04, 0x18, 0x30, 0x16, 0x80, 0x14, 0x97, 0xe4, 0x69, 0xd0, 0xc5, 0x04, 0x14, 0xc2, 0x6f,

    0xc7, 0x01, 0xf7, 0x7e, 0x94, 0x77, 0x39, 0x09, 0x8d, 0xf6, 0xa5, 0x30, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x04,

    0x03, 0x02, 0x03, 0x48, 0x00, 0x30, 0x45, 0x02, 0x20, 0x79, 0xaa, 0xe5, 0x07, 0x47, 0xc2, 0x27, 0x8f, 0x54, 0xa0, 0x9e, 0xb1,

    0xc0, 0xa3, 0xdd, 0x94, 0xf1, 0x28, 0xa4, 0x23, 0x8b, 0xf6, 0x35, 0x42, 0xbe, 0x23, 0x83, 0x12, 0x57, 0x88, 0xfa, 0x64, 0x02,

    0x21, 0x00, 0xef, 0xbc, 0x30, 0x8a, 0x8b, 0xb9, 0x2f, 0x8f, 0x84, 0x78, 0x06, 0x81, 0x52, 0xe0, 0x15, 0x59, 0x18, 0x29, 0x38,

    0xcc, 0x9f, 0x38, 0x5b, 0x8b, 0x5f, 0x4d, 0x37, 0xee, 0xf3, 0xd9, 0x51, 0x6d

};

// Official CD "Signing Key 001"

//

// -----BEGIN CERTIFICATE-----

// MIICBzCCAa2gAwIBAgIHY3NhY2RrMTAKBggqhkjOPQQDAjBSMQwwCgYDVQQKDAND

// U0ExLDAqBgNVBAMMI01hdHRlciBDZXJ0aWZpY2F0aW9uIGFuZCBUZXN0aW5nIENB

// MRQwEgYKKwYBBAGConwCAQwEQzVBMDAgFw0yMjEwMDMxOTI4NTVaGA8yMDcyMDky

// MDE5Mjg1NVowWDEMMAoGA1UECgwDQ1NBMTIwMAYDVQQDDClDZXJ0aWZpY2F0aW9u

// IERlY2xhcmF0aW9uIFNpZ25pbmcgS2V5IDAwMTEUMBIGCisGAQQBgqJ8AgEMBEM1

// QTAwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAATN7uk+RPi3K+PRqcB+IZaLmv/z

// tAPwXhZp17Hlyu5vx3FLQufiNpXpLNdjVHOigK5ojze7lInhFim5uU/3sJkpo2Yw

// ZDASBgNVHRMBAf8ECDAGAQH/AgEAMA4GA1UdDwEB/wQEAwIBhjAdBgNVHQ4EFgQU

// /jQ/lZlHdjth7kU5ExM4SU/mfY4wHwYDVR0jBBgwFoAUl+Rp0MUEFMJvxwH3fpR3

// OQmN9qUwCgYIKoZIzj0EAwIDSAAwRQIgEDWOcdKsVGtUh3evHbBd1lq4aS7yQtOp

// 6GrOQ3/zXBsCIQDxorh2RXSaI8m2RCcoWaiWa0nLzQepNm3C2jrQVJmC2Q==

// -----END CERTIFICATE-----

//

constexpr uint8_t gCdSigningKey001PubkeyBytes[] = {

    0x04, 0xcd, 0xee, 0xe9, 0x3e, 0x44, 0xf8, 0xb7, 0x2b, 0xe3, 0xd1, 0xa9, 0xc0, 0x7e, 0x21, 0x96, 0x8b,

    0x9a, 0xff, 0xf3, 0xb4, 0x03, 0xf0, 0x5e, 0x16, 0x69, 0xd7, 0xb1, 0xe5, 0xca, 0xee, 0x6f, 0xc7, 0x71,

    0x4b, 0x42, 0xe7, 0xe2, 0x36, 0x95, 0xe9, 0x2c, 0xd7, 0x63, 0x54, 0x73, 0xa2, 0x80, 0xae, 0x68, 0x8f,

    0x37, 0xbb, 0x94, 0x89, 0xe1, 0x16, 0x29, 0xb9, 0xb9, 0x4f, 0xf7, 0xb0, 0x99, 0x29,

};

constexpr uint8_t gCdSigningKey001Kid[] = {

    0xFE, 0x34, 0x3F, 0x95, 0x99, 0x47, 0x76, 0x3B, 0x61, 0xEE, 0x45, 0x39, 0x13, 0x13, 0x38, 0x49, 0x4F, 0xE6, 0x7D, 0x8E,

};

// Official CD "Signing Key 002"

//

// -----BEGIN CERTIFICATE-----

// MIICCDCCAa2gAwIBAgIHY3NhY2RrMjAKBggqhkjOPQQDAjBSMQwwCgYDVQQKDAND

// U0ExLDAqBgNVBAMMI01hdHRlciBDZXJ0aWZpY2F0aW9uIGFuZCBUZXN0aW5nIENB

// MRQwEgYKKwYBBAGConwCAQwEQzVBMDAgFw0yMjEwMDMxOTM2NDZaGA8yMDcyMDky

// MDE5MzY0NlowWDEMMAoGA1UECgwDQ1NBMTIwMAYDVQQDDClDZXJ0aWZpY2F0aW9u

// IERlY2xhcmF0aW9uIFNpZ25pbmcgS2V5IDAwMjEUMBIGCisGAQQBgqJ8AgEMBEM1

// QTAwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAAQDGTfo+UJRBF3ydFe7RiU+43VO

// jBKuKFV9gCe51MNW2RtAjP8yJ1AXsl+Mi6IFFtXIOvK3JBKAE9/Mj5XSAKkLo2Yw

// ZDASBgNVHRMBAf8ECDAGAQH/AgEAMA4GA1UdDwEB/wQEAwIBhjAdBgNVHQ4EFgQU

// 3QTbWFshTBxYFYfmVo30h7bdxwEwHwYDVR0jBBgwFoAUl+Rp0MUEFMJvxwH3fpR3

// OQmN9qUwCgYIKoZIzj0EAwIDSQAwRgIhAJruzxZ806cP/LoQ07PN9xAbjLdwUalV

// h0Qfx304Tb92AiEAk+jnf2qtyfKyTEHpT3Xf3bfekqUOA+8ikB1yjL5oTsI=

// -----END CERTIFICATE-----

//

constexpr uint8_t gCdSigningKey002PubkeyBytes[] = {

    0x04, 0x03, 0x19, 0x37, 0xe8, 0xf9, 0x42, 0x51, 0x04, 0x5d, 0xf2, 0x74, 0x57, 0xbb, 0x46, 0x25, 0x3e,

    0xe3, 0x75, 0x4e, 0x8c, 0x12, 0xae, 0x28, 0x55, 0x7d, 0x80, 0x27, 0xb9, 0xd4, 0xc3, 0x56, 0xd9, 0x1b,

    0x40, 0x8c, 0xff, 0x32, 0x27, 0x50, 0x17, 0xb2, 0x5f, 0x8c, 0x8b, 0xa2, 0x05, 0x16, 0xd5, 0xc8, 0x3a,

    0xf2, 0xb7, 0x24, 0x12, 0x80, 0x13, 0xdf, 0xcc, 0x8f, 0x95, 0xd2, 0x00, 0xa9, 0x0b,

};

constexpr uint8_t gCdSigningKey002Kid[] = {

    0xDD, 0x04, 0xDB, 0x58, 0x5B, 0x21, 0x4C, 0x1C, 0x58, 0x15, 0x87, 0xE6, 0x56, 0x8D, 0xF4, 0x87, 0xB6, 0xDD, 0xC7, 0x01,

};

// Official CD "Signing Key 003"

//

// -----BEGIN CERTIFICATE-----

// MIICBjCCAa2gAwIBAgIHY3NhY2RrMzAKBggqhkjOPQQDAjBSMQwwCgYDVQQKDAND

// U0ExLDAqBgNVBAMMI01hdHRlciBDZXJ0aWZpY2F0aW9uIGFuZCBUZXN0aW5nIENB

// MRQwEgYKKwYBBAGConwCAQwEQzVBMDAgFw0yMjEwMDMxOTQxMDFaGA8yMDcyMDky

// MDE5NDEwMVowWDEMMAoGA1UECgwDQ1NBMTIwMAYDVQQDDClDZXJ0aWZpY2F0aW9u

// IERlY2xhcmF0aW9uIFNpZ25pbmcgS2V5IDAwMzEUMBIGCisGAQQBgqJ8AgEMBEM1

// QTAwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAASfV1zV/bdSHxCk3zHwc5ErYUco

// 8tN/W2uWvCy/fAsRlpBXfVVdIaCWYKiwgqM56lMPeoEthpO1b9dkGF+rzTL1o2Yw

// ZDASBgNVHRMBAf8ECDAGAQH/AgEAMA4GA1UdDwEB/wQEAwIBhjAdBgNVHQ4EFgQU

// RxA158BOqqi+fE1ME+PkwgmVqEswHwYDVR0jBBgwFoAUl+Rp0MUEFMJvxwH3fpR3

// OQmN9qUwCgYIKoZIzj0EAwIDRwAwRAIgIFecbY+1mVVNqxH9+8IMB8+safdyIJU2

// AqqtZ/w7AkQCIHiVlYTaCnJsnW5/cvj9GfIv7Eb0cjdmcAkrYGbnPQzX

// -----END CERTIFICATE-----

//

constexpr uint8_t gCdSigningKey003PubkeyBytes[] = {

    0x04, 0x9f, 0x57, 0x5c, 0xd5, 0xfd, 0xb7, 0x52, 0x1f, 0x10, 0xa4, 0xdf, 0x31, 0xf0, 0x73, 0x91, 0x2b,

    0x61, 0x47, 0x28, 0xf2, 0xd3, 0x7f, 0x5b, 0x6b, 0x96, 0xbc, 0x2c, 0xbf, 0x7c, 0x0b, 0x11, 0x96, 0x90,

    0x57, 0x7d, 0x55, 0x5d, 0x21, 0xa0, 0x96, 0x60, 0xa8, 0xb0, 0x82, 0xa3, 0x39, 0xea, 0x53, 0x0f, 0x7a,

    0x81, 0x2d, 0x86, 0x93, 0xb5, 0x6f, 0xd7, 0x64, 0x18, 0x5f, 0xab, 0xcd, 0x32, 0xf5,

};

constexpr uint8_t gCdSigningKey003Kid[] = {

    0x47, 0x10, 0x35, 0xE7, 0xC0, 0x4E, 0xAA, 0xA8, 0xBE, 0x7C, 0x4D, 0x4C, 0x13, 0xE3, 0xE4, 0xC2, 0x09, 0x95, 0xA8, 0x4B,

};

// Official CD "Signing Key 004"

//

// -----BEGIN CERTIFICATE-----

// MIICBjCCAa2gAwIBAgIHY3NhY2RrNDAKBggqhkjOPQQDAjBSMQwwCgYDVQQKDAND

// U0ExLDAqBgNVBAMMI01hdHRlciBDZXJ0aWZpY2F0aW9uIGFuZCBUZXN0aW5nIENB

// MRQwEgYKKwYBBAGConwCAQwEQzVBMDAgFw0yMjEwMDMxOTQzMjFaGA8yMDcyMDky

// MDE5NDMyMVowWDEMMAoGA1UECgwDQ1NBMTIwMAYDVQQDDClDZXJ0aWZpY2F0aW9u

// IERlY2xhcmF0aW9uIFNpZ25pbmcgS2V5IDAwNDEUMBIGCisGAQQBgqJ8AgEMBEM1

// QTAwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAAR8/I2IEKic9PoZF3jyr+x4+FF6

// l6Plf8ITutiI42EedP+2hL3rqKaLJSNKXDWPNzurm20wThMG3XYgpSjRFhwLo2Yw

// ZDASBgNVHRMBAf8ECDAGAQH/AgEAMA4GA1UdDwEB/wQEAwIBhjAdBgNVHQ4EFgQU

// 9oYDo2kumBByQZ6h4as4VL13ldMwHwYDVR0jBBgwFoAUl+Rp0MUEFMJvxwH3fpR3

// OQmN9qUwCgYIKoZIzj0EAwIDRwAwRAIgLqAfkbtLYYdmQsnbn0CWv3G1/lbE36nz

// HbLbW5t6PY4CIE8oyIHsVhNSTPcb3mwRp+Vxhs8tKhbAdwv5BGgDaAHj

// -----END CERTIFICATE-----

//

constexpr uint8_t gCdSigningKey004PubkeyBytes[] = {

    0x04, 0x7c, 0xfc, 0x8d, 0x88, 0x10, 0xa8, 0x9c, 0xf4, 0xfa, 0x19, 0x17, 0x78, 0xf2, 0xaf, 0xec, 0x78,

    0xf8, 0x51, 0x7a, 0x97, 0xa3, 0xe5, 0x7f, 0xc2, 0x13, 0xba, 0xd8, 0x88, 0xe3, 0x61, 0x1e, 0x74, 0xff,

    0xb6, 0x84, 0xbd, 0xeb, 0xa8, 0xa6, 0x8b, 0x25, 0x23, 0x4a, 0x5c, 0x35, 0x8f, 0x37, 0x3b, 0xab, 0x9b,

    0x6d, 0x30, 0x4e, 0x13, 0x06, 0xdd, 0x76, 0x20, 0xa5, 0x28, 0xd1, 0x16, 0x1c, 0x0b,

};

constexpr uint8_t gCdSigningKey004Kid[] = {

    0xF6, 0x86, 0x03, 0xA3, 0x69, 0x2E, 0x98, 0x10, 0x72, 0x41, 0x9E, 0xA1, 0xE1, 0xAB, 0x38, 0x54, 0xBD, 0x77, 0x95, 0xD3,

};

// Official CD "Signing Key 005"

//

// -----BEGIN CERTIFICATE-----

// MIICBzCCAa2gAwIBAgIHY3NhY2RrNTAKBggqhkjOPQQDAjBSMQwwCgYDVQQKDAND

// U0ExLDAqBgNVBAMMI01hdHRlciBDZXJ0aWZpY2F0aW9uIGFuZCBUZXN0aW5nIENB

// MRQwEgYKKwYBBAGConwCAQwEQzVBMDAgFw0yMjEwMDMxOTQ3MTVaGA8yMDcyMDky

// MDE5NDcxNVowWDEMMAoGA1UECgwDQ1NBMTIwMAYDVQQDDClDZXJ0aWZpY2F0aW9u

// IERlY2xhcmF0aW9uIFNpZ25pbmcgS2V5IDAwNTEUMBIGCisGAQQBgqJ8AgEMBEM1

// QTAwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAARDilLGYqKm1yZH+V63UxNu5K4P

// 2zqpwWkxQms9CGf5EDrn16G4h+n4E6byb3a7zak1k3h8EneMqPKXXcRaIEL5o2Yw

// ZDASBgNVHRMBAf8ECDAGAQH/AgEAMA4GA1UdDwEB/wQEAwIBhjAdBgNVHQ4EFgQU

// Y38mNK1i6v5q9mLvuW9v0vy//C8wHwYDVR0jBBgwFoAUl+Rp0MUEFMJvxwH3fpR3

// OQmN9qUwCgYIKoZIzj0EAwIDSAAwRQIhAM1HQpvkHKxLJByWaSYAPRZgh3Bis18W

// AViq7c/mtzEAAiBZO0lVe6Qo9iQPIBWZaVx/S/YSNO9uKNa/pvFu3V+nIg==

// -----END CERTIFICATE-----

//

constexpr uint8_t gCdSigningKey005PubkeyBytes[] = {

    0x04, 0x43, 0x8a, 0x52, 0xc6, 0x62, 0xa2, 0xa6, 0xd7, 0x26, 0x47, 0xf9, 0x5e, 0xb7, 0x53, 0x13, 0x6e,

    0xe4, 0xae, 0x0f, 0xdb, 0x3a, 0xa9, 0xc1, 0x69, 0x31, 0x42, 0x6b, 0x3d, 0x08, 0x67, 0xf9, 0x10, 0x3a,

    0xe7, 0xd7, 0xa1, 0xb8, 0x87, 0xe9, 0xf8, 0x13, 0xa6, 0xf2, 0x6f, 0x76, 0xbb, 0xcd, 0xa9, 0x35, 0x93,

    0x78, 0x7c, 0x12, 0x77, 0x8c, 0xa8, 0xf2, 0x97, 0x5d, 0xc4, 0x5a, 0x20, 0x42, 0xf9,

};

constexpr uint8_t gCdSigningKey005Kid[] = {

    0x63, 0x7F, 0x26, 0x34, 0xAD, 0x62, 0xEA, 0xFE, 0x6A, 0xF6, 0x62, 0xEF, 0xB9, 0x6F, 0x6F, 0xD2, 0xFC, 0xBF, 0xFC, 0x2F,

};

struct MatterCDSigningKey

{

    const CertificateKeyId mKid;

    const P256PublicKeySpan mPubkey;

};

constexpr std::array<MatterCDSigningKey, 6> gCdSigningKeys = { {

    { FixedByteSpan<20>{ gTestCdPubkeyKid }, FixedByteSpan<65>{ gTestCdPubkeyBytes } },

    { FixedByteSpan<20>{ gCdSigningKey001Kid }, FixedByteSpan<65>{ gCdSigningKey001PubkeyBytes } },

    { FixedByteSpan<20>{ gCdSigningKey002Kid }, FixedByteSpan<65>{ gCdSigningKey002PubkeyBytes } },

    { FixedByteSpan<20>{ gCdSigningKey003Kid }, FixedByteSpan<65>{ gCdSigningKey003PubkeyBytes } },

    { FixedByteSpan<20>{ gCdSigningKey004Kid }, FixedByteSpan<65>{ gCdSigningKey004PubkeyBytes } },

    { FixedByteSpan<20>{ gCdSigningKey005Kid }, FixedByteSpan<65>{ gCdSigningKey005PubkeyBytes } },

} };

struct TestAttestationTrustStore final : public ArrayAttestationTrustStore

{

    TestAttestationTrustStore() : ArrayAttestationTrustStore(GetTestPaaRootStore().data(), GetTestPaaRootStore().size()) {}

};

Global<TestAttestationTrustStore> gTestAttestationTrustStore;

AttestationVerificationResult MapError(CertificateChainValidationResult certificateChainValidationResult)

{

    switch (certificateChainValidationResult)

    {

    case CertificateChainValidationResult::kRootFormatInvalid:

        return AttestationVerificationResult::kPaaFormatInvalid;

    case CertificateChainValidationResult::kRootArgumentInvalid:

        return AttestationVerificationResult::kPaaArgumentInvalid;

    case CertificateChainValidationResult::kICAFormatInvalid:

        return AttestationVerificationResult::kPaiFormatInvalid;

    case CertificateChainValidationResult::kICAArgumentInvalid:

        return AttestationVerificationResult::kPaiArgumentInvalid;

    case CertificateChainValidationResult::kLeafFormatInvalid:

        return AttestationVerificationResult::kDacFormatInvalid;

    case CertificateChainValidationResult::kLeafArgumentInvalid:

        return AttestationVerificationResult::kDacArgumentInvalid;

    case CertificateChainValidationResult::kChainInvalid:

        return AttestationVerificationResult::kDacSignatureInvalid;

    case CertificateChainValidationResult::kNoMemory:

        return AttestationVerificationResult::kNoMemory;

    case CertificateChainValidationResult::kInternalFrameworkError:

        return AttestationVerificationResult::kInternalError;

    default:

        return AttestationVerificationResult::kInternalError;

    }

}

bool SupportsAttestationVerificationProfile(DeviceAttestationCertProfile profile)

{

    switch (profile)

    {

    case DeviceAttestationCertProfile::kEcdsaMatterLegacy:

        return true;

    case DeviceAttestationCertProfile::kMlDsa44:

        return Crypto::IsMlDsa44Supported();

    case DeviceAttestationCertProfile::kMlDsa65:

        return Crypto::IsMlDsa65Supported();

    case DeviceAttestationCertProfile::kUnknownEnumValue:

        return false;

    }

    return false;

}

// CertificateType class doesn't work since it doesn't encode PAA.

enum class AttestationChainElement : uint8_t

{

    kPAA = 0,

    kPAI = 1,

    kDAC = 2

};

enum class KeyIdType : uint8_t

{

    kAuthorityKeyId = 0,

    kSubjectKeyId   = 1,

};

#if CHIP_PROGRESS_LOGGING

const char * CertTypeAsString(AttestationChainElement certType)

{

    switch (certType)

    {

    case AttestationChainElement::kPAA:

        return "PAA";

    case AttestationChainElement::kPAI:

        return "PAI";

    case AttestationChainElement::kDAC:

        return "DAC";

    default:

        break;

    }

    return "<UNKNOWN>";

}

#endif // CHIP_PROGRESS_LOGGING

void LogOneKeyId(KeyIdType keyIdType, AttestationChainElement certType, ByteSpan derBuffer)

{

#if CHIP_PROGRESS_LOGGING

    const char * certTypeName = CertTypeAsString(certType);

    uint8_t keyIdBuf[Crypto::kAuthorityKeyIdentifierLength]; // Big enough for SKID/AKID.

    MutableByteSpan keyIdSpan{ keyIdBuf };

    CHIP_ERROR err = CHIP_NO_ERROR;

    const char * keyIdTypeString = "<UNKNOWN>";

    switch (keyIdType)

    {

    case KeyIdType::kAuthorityKeyId:

        err             = ExtractAKIDFromX509Cert(derBuffer, keyIdSpan);

        keyIdTypeString = "AKID";

        break;

    case KeyIdType::kSubjectKeyId:

        err             = ExtractSKIDFromX509Cert(derBuffer, keyIdSpan);

        keyIdTypeString = "SKID";

        break;

    default:

        err = CHIP_ERROR_INTERNAL;

        break;

    }

    if (err != CHIP_NO_ERROR)

    {

        ChipLogError(NotSpecified, "Failed to extract %s from %s: %" CHIP_ERROR_FORMAT, keyIdTypeString, certTypeName,

                     err.Format());

        return;

    }

    KeyIdStringifier KeyIdStringifier;

    const char * keyIdString = KeyIdStringifier.KeyIdToHex(keyIdSpan);

    ChipLogProgress(NotSpecified, "--> %s certificate %s: %s", certTypeName, keyIdTypeString, keyIdString);

#else

    IgnoreUnusedVariable(keyIdType);

    IgnoreUnusedVariable(certType);

    IgnoreUnusedVariable(derBuffer);

#endif // CHIP_PROGRESS_LOGGING

}

void LogCertificateAsPem(AttestationChainElement element, ByteSpan derBuffer)

{

#if CHIP_PROGRESS_LOGGING

    ChipLogProgress(NotSpecified, "==== %s certificate considered (%u bytes) ====", CertTypeAsString(element),

                    static_cast<unsigned>(derBuffer.size()));

    PemEncoder encoder("CERTIFICATE", derBuffer);

    for (const char * pemLine = encoder.NextLine(); pemLine != nullptr; pemLine = encoder.NextLine())

    {

        ChipLogProgress(NotSpecified, "%s", pemLine);

    }

#else

    IgnoreUnusedVariable(element);

    IgnoreUnusedVariable(derBuffer);

#endif // CHIP_PROGRESS_LOGGING

}

void LogCertDebugData(AttestationChainElement element, ByteSpan derBuffer)

{

    LogCertificateAsPem(element, derBuffer);

    LogOneKeyId(KeyIdType::kSubjectKeyId, element, derBuffer);

    LogOneKeyId(KeyIdType::kAuthorityKeyId, element, derBuffer);

}

#if CHIP_PROGRESS_LOGGING

const char * CertificationTypeAsString(CertificationType certificationType)

{

    switch (certificationType)

    {

    case CertificationType::kDevelopmentAndTest:

        return "Development and testing";

    case CertificationType::kProvisional:

        return "Provisional certification";

    case CertificationType::kOfficial:

        return "Certified device";

    default:

        break;

    }

    return "<UNKNOWN>";

}

#endif

} // namespace

CHIP_ERROR DefaultDACVerifier::GetPaaCertificateAllocationSize(ByteSpan paiDer, size_t & allocationSize)

{

    // The PAI request profile describes its subject key, whereas its signature identifies

    // the PAA algorithm. A P-256 PAI can therefore require an ML-DSA PAA buffer.

    using namespace ASN1;

    ASN1Reader reader;

    reader.Init(paiDer);

    ReturnErrorOnFailure(reader.Next());

    VerifyOrReturnError(reader.GetClass() == kASN1TagClass_Universal && reader.GetTag() == kASN1UniversalTag_Sequence,

                        CHIP_ERROR_INVALID_ARGUMENT);

    ReturnErrorOnFailure(reader.EnterConstructedType());

    ReturnErrorOnFailure(reader.Next()); // TBSCertificate

    VerifyOrReturnError(reader.GetClass() == kASN1TagClass_Universal && reader.GetTag() == kASN1UniversalTag_Sequence,

                        CHIP_ERROR_INVALID_ARGUMENT);

    ReturnErrorOnFailure(reader.Next()); // signatureAlgorithm

    VerifyOrReturnError(reader.GetClass() == kASN1TagClass_Universal && reader.GetTag() == kASN1UniversalTag_Sequence,

                        CHIP_ERROR_INVALID_ARGUMENT);

    ReturnErrorOnFailure(reader.EnterConstructedType());

    ReturnErrorOnFailure(reader.Next());

    VerifyOrReturnError(reader.GetClass() == kASN1TagClass_Universal && reader.GetTag() == kASN1UniversalTag_ObjectId,

                        CHIP_ERROR_INVALID_ARGUMENT);

    // DER OID values for ecdsa-with-SHA256, id-ml-dsa-44, and id-ml-dsa-65.

    constexpr uint8_t kEcdsaSha256[] = { 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x04, 0x03, 0x02 };

    constexpr uint8_t kMlDsa44[]     = { 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x03, 0x11 };

    constexpr uint8_t kMlDsa65[]     = { 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x03, 0x12 };

    const ByteSpan signatureOid(reader.GetValue(), reader.GetValueLen());

    if (signatureOid.data_equal(ByteSpan(kEcdsaSha256)))

    {

        allocationSize = kMaxDERCertLength;

        return CHIP_NO_ERROR;

    }

    if (signatureOid.data_equal(ByteSpan(kMlDsa44)))

    {

        allocationSize = kMaxDERCertLengthMlDsa44;

        return Crypto::IsMlDsa44Supported() ? CHIP_NO_ERROR : CHIP_ERROR_NOT_IMPLEMENTED;

    }

    if (signatureOid.data_equal(ByteSpan(kMlDsa65)))

    {

        allocationSize = kMaxDERCertLengthMlDsa65;

        return Crypto::IsMlDsa65Supported() ? CHIP_NO_ERROR : CHIP_ERROR_NOT_IMPLEMENTED;

    }

    return CHIP_ERROR_UNSUPPORTED_CERT_FORMAT;

}

void DefaultDACVerifier::VerifyAttestationInformation(const DeviceAttestationVerifier::AttestationInfo & info,

                                                      Callback::Callback<OnAttestationInformationVerification> * onCompletion)

{

    // The exit handler below dereferences onCompletion unconditionally; reject null here.

    VerifyOrReturn(onCompletion != nullptr);

    AttestationVerificationResult attestationError = AttestationVerificationResult::kSuccess;

    Platform::ScopedMemoryBuffer<uint8_t> paaCert;

    MutableByteSpan paaDerBuffer;

    AttestationCertVidPid dacVidPid;

    AttestationCertVidPid paiVidPid;

    AttestationCertVidPid paaVidPid;

    size_t paaCertAllocatedLen = 0;

    VerifyOrExit(!info.attestationElementsBuffer.empty() && !info.attestationChallengeBuffer.empty() &&

                     !info.attestationSignatureBuffer.empty() && !info.dacDerBuffer.empty() && !info.attestationNonceBuffer.empty(),

                 attestationError = AttestationVerificationResult::kInvalidArgument);

    VerifyOrExit(info.attestationElementsBuffer.size() <= kMaxResponseLength,

                 attestationError = AttestationVerificationResult::kInvalidArgument);

    if (!SupportsAttestationVerificationProfile(info.attestationProfile))

    {

        ChipLogError(NotSpecified, "PQC device attestation verification is not implemented for requested profile %u",

                     to_underlying(info.attestationProfile));

        attestationError = AttestationVerificationResult::kNotImplemented;

        ExitNow();

    }

    // Ensure PAI is present

    VerifyOrExit(!info.paiDerBuffer.empty(), attestationError = AttestationVerificationResult::kPaiMissing);

    // This is an allocation/capability hint only; certificate validation below still

    // checks the PAI signature against the trusted PAA.

    {

        const CHIP_ERROR err = GetPaaCertificateAllocationSize(info.paiDerBuffer, paaCertAllocatedLen);

        VerifyOrExit(err == CHIP_NO_ERROR,

                     attestationError = err == CHIP_ERROR_NOT_IMPLEMENTED ? AttestationVerificationResult::kNotImplemented

                                                                          : AttestationVerificationResult::kPaiFormatInvalid);

    }

    // Validate Proper Certificate Format

    {

        VerifyOrExit(VerifyAttestationCertificateFormat(info.paiDerBuffer, AttestationCertType::kPAI) == CHIP_NO_ERROR,

                     attestationError = AttestationVerificationResult::kPaiFormatInvalid);

        VerifyOrExit(VerifyAttestationCertificateFormat(info.dacDerBuffer, AttestationCertType::kDAC) == CHIP_NO_ERROR,

                     attestationError = AttestationVerificationResult::kDacFormatInvalid);

    }

    // match DAC and PAI VIDs

    {

        VerifyOrExit(ExtractVIDPIDFromX509Cert(info.dacDerBuffer, dacVidPid) == CHIP_NO_ERROR,

                     attestationError = AttestationVerificationResult::kDacFormatInvalid);

        VerifyOrExit(ExtractVIDPIDFromX509Cert(info.paiDerBuffer, paiVidPid) == CHIP_NO_ERROR,

                     attestationError = AttestationVerificationResult::kPaiFormatInvalid);

        VerifyOrExit(paiVidPid.mVendorId.HasValue() && paiVidPid.mVendorId == dacVidPid.mVendorId,

                     attestationError = AttestationVerificationResult::kDacVendorIdMismatch);

        VerifyOrExit(dacVidPid.mProductId.HasValue(), attestationError = AttestationVerificationResult::kDacProductIdMismatch);

        if (paiVidPid.mProductId.HasValue())

        {

            VerifyOrExit(paiVidPid.mProductId == dacVidPid.mProductId,

                         attestationError = AttestationVerificationResult::kDacProductIdMismatch);

        }

    }

    // Log info about the DAC chain so far (DAC, PAI).

    if (AreVerboseLogsEnabled())

    {

        ChipLogProgress(NotSpecified, "Device candidate DAC chain details:");

        ChipLogProgress(NotSpecified, "--> DAC's VID: 0x%04X, PID: 0x%04X", dacVidPid.mVendorId.Value(),

                        dacVidPid.mProductId.Value());

        LogCertDebugData(AttestationChainElement::kDAC, info.dacDerBuffer);

        LogCertDebugData(AttestationChainElement::kPAI, info.paiDerBuffer);

    }

    // Validate overall attestation signature on attestation information.

    {

        P256PublicKey remoteManufacturerPubkey;

        P256ECDSASignature deviceSignature;

        VerifyOrExit(ExtractPubkeyFromX509Cert(info.dacDerBuffer, remoteManufacturerPubkey) == CHIP_NO_ERROR,

                     attestationError = AttestationVerificationResult::kDacFormatInvalid);

        // SetLength will fail if signature doesn't fit

        VerifyOrExit(deviceSignature.SetLength(info.attestationSignatureBuffer.size()) == CHIP_NO_ERROR,

                     attestationError = AttestationVerificationResult::kAttestationSignatureInvalidFormat);

        memcpy(deviceSignature.Bytes(), info.attestationSignatureBuffer.data(), info.attestationSignatureBuffer.size());

        VerifyOrExit(ValidateAttestationSignature(remoteManufacturerPubkey, info.attestationElementsBuffer,

                                                  info.attestationChallengeBuffer, deviceSignature) == CHIP_NO_ERROR,

                     attestationError = AttestationVerificationResult::kAttestationSignatureInvalid);

    }

    // Find PAA and validate it.

    {

        uint8_t paiAkidBuf[Crypto::kAuthorityKeyIdentifierLength];

        MutableByteSpan paiAkid(paiAkidBuf);

        CHIP_ERROR err = CHIP_NO_ERROR;

        VerifyOrExit(ExtractAKIDFromX509Cert(info.paiDerBuffer, paiAkid) == CHIP_NO_ERROR,

                     attestationError = AttestationVerificationResult::kPaiFormatInvalid);

        VerifyOrExit(paaCert.Alloc(paaCertAllocatedLen), attestationError = AttestationVerificationResult::kNoMemory);

        paaDerBuffer = MutableByteSpan(paaCert.Get(), paaCertAllocatedLen);

        err          = mAttestationTrustStore->GetProductAttestationAuthorityCert(paiAkid, paaDerBuffer);

        if (err == CHIP_ERROR_NOT_IMPLEMENTED)

        {

            err = gTestAttestationTrustStore->GetProductAttestationAuthorityCert(paiAkid, paaDerBuffer);

        }

        if (err != CHIP_NO_ERROR)

        {

            attestationError = AttestationVerificationResult::kPaaNotFound;

#if CHIP_ERROR_LOGGING

            KeyIdStringifier paiAkidWriter;

            [[maybe_unused]] const char * paiAkidHexString = paiAkidWriter.KeyIdToHex(paiAkid);

            ChipLogError(NotSpecified, "Unable to find PAA, err: %" CHIP_ERROR_FORMAT ", PAI's AKID: %s", err.Format(),

                         paiAkidHexString);

#endif // CHIP_ERROR_LOGGING

            ExitNow();

        }

        if (AreVerboseLogsEnabled())

        {

            // PAA details following the DAC/PAI above.

            LogCertDebugData(AttestationChainElement::kPAA, paaDerBuffer);

        }

        VerifyOrExit(ExtractVIDPIDFromX509Cert(paaDerBuffer, paaVidPid) == CHIP_NO_ERROR,

                     attestationError = AttestationVerificationResult::kPaaFormatInvalid);

        if (paaVidPid.mVendorId.HasValue())

        {

            VerifyOrExit(paaVidPid.mVendorId == paiVidPid.mVendorId,

                         attestationError = AttestationVerificationResult::kPaiVendorIdMismatch);

        }

        VerifyOrExit(!paaVidPid.mProductId.HasValue(), attestationError = AttestationVerificationResult::kPaaFormatInvalid);

    }

#if !defined(CURRENT_TIME_NOT_IMPLEMENTED)

    VerifyOrExit(IsCertificateValidAtCurrentTime(info.dacDerBuffer) == CHIP_NO_ERROR,

                 attestationError = AttestationVerificationResult::kDacExpired);

#endif

    CertificateChainValidationResult chainValidationResult;

    VerifyOrExit(ValidateCertificateChain(paaDerBuffer.data(), paaDerBuffer.size(), info.paiDerBuffer.data(),

                                          info.paiDerBuffer.size(), info.dacDerBuffer.data(), info.dacDerBuffer.size(),

                                          chainValidationResult) == CHIP_NO_ERROR,

                 attestationError = MapError(chainValidationResult));

    {

        ByteSpan certificationDeclarationSpan;

        ByteSpan attestationNonceSpan;

        uint32_t timestampDeconstructed;

        ByteSpan firmwareInfoSpan;

        DeviceAttestationVendorReservedDeconstructor vendorReserved;

        ByteSpan certificationDeclarationPayload;

        DeviceInfoForAttestation deviceInfo{

            .vendorId     = info.vendorId,

            .productId    = info.productId,

            .dacVendorId  = dacVidPid.mVendorId.Value(),

            .dacProductId = dacVidPid.mProductId.Value(),

            .paiVendorId  = paiVidPid.mVendorId.Value(),

            .paiProductId = paiVidPid.mProductId.ValueOr(0),

            .paaVendorId  = paaVidPid.mVendorId.ValueOr(VendorId::NotSpecified),

        };

        MutableByteSpan paaSKID(deviceInfo.paaSKID);

        VerifyOrExit(ExtractSKIDFromX509Cert(paaDerBuffer, paaSKID) == CHIP_NO_ERROR,

                     attestationError = AttestationVerificationResult::kPaaFormatInvalid);

        VerifyOrExit(paaSKID.size() == sizeof(deviceInfo.paaSKID),

                     attestationError = AttestationVerificationResult::kPaaFormatInvalid);

        VerifyOrExit(DeconstructAttestationElements(info.attestationElementsBuffer, certificationDeclarationSpan,

                                                    attestationNonceSpan, timestampDeconstructed, firmwareInfoSpan,

                                                    vendorReserved) == CHIP_NO_ERROR,

                     attestationError = AttestationVerificationResult::kAttestationElementsMalformed);

        // Verify that Nonce matches with what we sent

        VerifyOrExit(attestationNonceSpan.data_equal(info.attestationNonceBuffer),

                     attestationError = AttestationVerificationResult::kAttestationNonceMismatch);

        attestationError = ValidateCertificationDeclarationSignature(certificationDeclarationSpan, certificationDeclarationPayload);

        VerifyOrExit(attestationError == AttestationVerificationResult::kSuccess, attestationError = attestationError);

        attestationError = ValidateCertificateDeclarationPayload(certificationDeclarationPayload, firmwareInfoSpan, deviceInfo);

        VerifyOrExit(attestationError == AttestationVerificationResult::kSuccess, attestationError = attestationError);

    }

exit:

    onCompletion->mCall(onCompletion->mContext, info, attestationError);

}

AttestationVerificationResult DefaultDACVerifier::ValidateCertificationDeclarationSignature(const ByteSpan & cmsEnvelopeBuffer,

                                                                                            ByteSpan & certDeclBuffer)

{

    ByteSpan kid;

    VerifyOrReturnError(CMS_ExtractKeyId(cmsEnvelopeBuffer, kid) == CHIP_NO_ERROR,

                        AttestationVerificationResult::kCertificationDeclarationNoKeyId);

    Crypto::P256PublicKey verifyingKey;

    CHIP_ERROR err = mCdKeysTrustStore.LookupVerifyingKey(kid, verifyingKey);

    VerifyOrReturnError(err == CHIP_NO_ERROR, AttestationVerificationResult::kCertificationDeclarationNoCertificateFound);

#if CHIP_PROGRESS_LOGGING

    if (AreVerboseLogsEnabled())

    {

        KeyIdStringifier cdAkidWriter;

        const char * cdAkidHexString = cdAkidWriter.KeyIdToHex(kid);

        ChipLogProgress(NotSpecified, "CD signing key identifier: %s", cdAkidHexString);

    }

#endif

    if (mCdKeysTrustStore.IsCdTestKey(kid))

    {

        // Disallow test key if support not enabled

        if (!IsCdTestKeySupported())

        {

            ChipLogError(NotSpecified, "Disallowing CD signed by test key");

            return AttestationVerificationResult::kCertificationDeclarationNoCertificateFound;

        }

        ChipLogProgress(NotSpecified, "Allowing CD signed by test key");

    }

    VerifyOrReturnError(CMS_Verify(cmsEnvelopeBuffer, verifyingKey, certDeclBuffer) == CHIP_NO_ERROR,

                        AttestationVerificationResult::kCertificationDeclarationInvalidSignature);

    // certDeclBuffer is populated by CMS_Verify so we need to do this check after the signature check

    CertificationElementsWithoutPIDs cdContent;

    VerifyOrReturnError(DecodeCertificationElements(certDeclBuffer, cdContent) == CHIP_NO_ERROR,

                        AttestationVerificationResult::kCertificationDeclarationInvalidFormat);

    // Ensure we didn't use a test key for official or provisional certificates (if disallowed)

    bool testKeyAllowedForCertificationType =

        (cdContent.certificationType == to_underlying(CertificationType::kDevelopmentAndTest)) ||

        (cdContent.certificationType == to_underlying(CertificationType::kProvisional) && kEnableCdTestKeysForProvisionalCds);

    ChipLogProgress(NotSpecified, "Certification type %u", cdContent.certificationType);

    if (mCdKeysTrustStore.IsCdTestKey(kid) && !testKeyAllowedForCertificationType)

    {

        ChipLogError(NotSpecified, "Test key is disallowed for this certification type: %u", cdContent.certificationType);

        return AttestationVerificationResult::kCertificationDeclarationNoCertificateFound;

    }

    return AttestationVerificationResult::kSuccess;

}

AttestationVerificationResult DefaultDACVerifier::ValidateCertificateDeclarationPayload(const ByteSpan & certDeclBuffer,

                                                                                        const ByteSpan & firmwareInfo,

                                                                                        const DeviceInfoForAttestation & deviceInfo)

{

    CertificationElementsWithoutPIDs cdContent;

    CertificationElementsDecoder cdElementsDecoder;

    VerifyOrReturnError(DecodeCertificationElements(certDeclBuffer, cdContent) == CHIP_NO_ERROR,

                        AttestationVerificationResult::kCertificationDeclarationInvalidFormat);

    if (!firmwareInfo.empty())

    {

        // TODO: validate contents based on DCL

    }

    // Verify the cd elements are as required by the spec

    // security_level, security_information are meant to be ignored. version_number is not meant to be interpreted by the

    // commissioners.

    if (cdContent.formatVersion != 1 || cdContent.certificationType >= chip::to_underlying(CertificationType::kReserved))

    {

        return AttestationVerificationResult::kAttestationElementsMalformed;

    }

    // The vendor_id field in the Certification Declaration SHALL match the VendorID attribute found in the Basic Information

    // cluster

    VerifyOrReturnError(cdContent.vendorId == deviceInfo.vendorId,

                        AttestationVerificationResult::kCertificationDeclarationInvalidVendorId);

    //  The product_id_array field in the Certification Declaration SHALL contain the value of the ProductID attribute found in

    //  the Basic Information cluster.

    VerifyOrReturnError(cdElementsDecoder.IsProductIdIn(certDeclBuffer, deviceInfo.productId),

                        AttestationVerificationResult::kCertificationDeclarationInvalidProductId);

    if (cdContent.dacOriginVIDandPIDPresent)

    {

        // The Vendor ID (VID) subject DN in the DAC SHALL match the dac_origin_vendor_id field in the Certification

        // Declaration.

        VerifyOrReturnError(deviceInfo.dacVendorId == cdContent.dacOriginVendorId,

                            AttestationVerificationResult::kCertificationDeclarationInvalidVendorId);

        // The Vendor ID (VID) subject DN in the PAI SHALL match the dac_origin_vendor_id field in the Certification

        // Declaration.

        VerifyOrReturnError(deviceInfo.paiVendorId == cdContent.dacOriginVendorId,

                            AttestationVerificationResult::kCertificationDeclarationInvalidVendorId);

        // The Product ID (PID) subject DN in the DAC SHALL match the dac_origin_product_id field in the Certification

        // Declaration.

        VerifyOrReturnError(deviceInfo.dacProductId == cdContent.dacOriginProductId,

                            AttestationVerificationResult::kCertificationDeclarationInvalidProductId);

        // The Product ID (PID) subject DN in the PAI, if such a Product ID is present, SHALL match the dac_origin_product_id

        // field in the Certification Declaration.

        if (deviceInfo.paiProductId != 0) // if PAI PID is present

        {

            VerifyOrReturnError(deviceInfo.paiProductId == cdContent.dacOriginProductId,

                                AttestationVerificationResult::kCertificationDeclarationInvalidProductId);

        }

    }

    else

    {

        //  The Vendor ID (VID) subject DN in the DAC SHALL match the vendor_id field in the Certification Declaration

        VerifyOrReturnError(deviceInfo.dacVendorId == cdContent.vendorId,

                            AttestationVerificationResult::kCertificationDeclarationInvalidVendorId);

        // The Vendor ID (VID) subject DN in the PAI SHALL match the vendor_id field in the Certification Declaration.

        VerifyOrReturnError(deviceInfo.paiVendorId == cdContent.vendorId,

                            AttestationVerificationResult::kCertificationDeclarationInvalidVendorId);

        // The Product ID (PID) subject DN in the DAC SHALL be present in the product_id_array field in the Certification

        // Declaration.

        VerifyOrReturnError(cdElementsDecoder.IsProductIdIn(certDeclBuffer, deviceInfo.dacProductId),

                            AttestationVerificationResult::kCertificationDeclarationInvalidProductId);

        // The Product ID (PID) subject DN in the PAI, if such a Product ID is present, SHALL match one of the values present in

        // the product_id_array field in the Certification Declaration.

        if (deviceInfo.paiProductId != 0) // if PAI PID is present

        {

            VerifyOrReturnError(cdElementsDecoder.IsProductIdIn(certDeclBuffer, deviceInfo.paiProductId),

                                AttestationVerificationResult::kCertificationDeclarationInvalidProductId);

        }

    }

    if (cdContent.authorizedPAAListPresent)

    {

        // The Subject Key Id of the PAA SHALL match one of the values present in the authorized_paa_list

        // in the Certification Declaration.

        VerifyOrReturnError(cdElementsDecoder.HasAuthorizedPAA(certDeclBuffer, ByteSpan(deviceInfo.paaSKID)),

                            AttestationVerificationResult::kCertificationDeclarationInvalidPAA);

    }

    if (AreVerboseLogsEnabled())

    {

        ChipLogProgress(NotSpecified, "Device certification declaration details:");

        ChipLogProgress(NotSpecified, "--> VID: 0x%04X", cdContent.vendorId);

        // TODO (https://github.com/project-chip/connectedhomeip/issues/39714): Figure out how to

        // log the product_id_array, which is not in cdContent.

        ChipLogProgress(NotSpecified, "--> Device type ID: " ChipLogFormatMEI, ChipLogValueMEI(cdContent.deviceTypeId));

        ChipLogProgress(NotSpecified, "--> Certification type: %d (%s)", cdContent.certificationType,

                        CertificationTypeAsString(static_cast<CertificationType>(cdContent.certificationType)));

        if (cdContent.dacOriginVIDandPIDPresent)

        {

            ChipLogProgress(NotSpecified, "--> DAC origin VID: 0x%04X, PID: 0x%04X", cdContent.dacOriginVendorId,

                            cdContent.dacOriginProductId);

        }

    }

    return AttestationVerificationResult::kSuccess;

}

CHIP_ERROR DefaultDACVerifier::VerifyNodeOperationalCSRInformation(const ByteSpan & nocsrElementsBuffer,

                                                                   const ByteSpan & attestationChallengeBuffer,

                                                                   const ByteSpan & attestationSignatureBuffer,

                                                                   const P256PublicKey & dacPublicKey, const ByteSpan & csrNonce)

{

    VerifyOrReturnError(!nocsrElementsBuffer.empty() && !attestationChallengeBuffer.empty() &&

                            !attestationSignatureBuffer.empty() && !csrNonce.empty(),

                        CHIP_ERROR_INVALID_ARGUMENT);

    VerifyOrReturnError(nocsrElementsBuffer.size() <= kMaxResponseLength, CHIP_ERROR_INVALID_ARGUMENT);

    VerifyOrReturnError(csrNonce.size() == Controller::kCSRNonceLength, CHIP_ERROR_INVALID_ARGUMENT);

    ByteSpan csrSpan;

    ByteSpan csrNonceSpan;

    ByteSpan vendorReserved1Span;

    ByteSpan vendorReserved2Span;

    ByteSpan vendorReserved3Span;

    ReturnErrorOnFailure(DeconstructNOCSRElements(nocsrElementsBuffer, csrSpan, csrNonceSpan, vendorReserved1Span,

                                                  vendorReserved2Span, vendorReserved3Span));

    VerifyOrReturnError(csrNonceSpan.size() == Controller::kCSRNonceLength, CHIP_ERROR_INVALID_ARGUMENT);

    // Verify that Nonce matches with what we sent

    VerifyOrReturnError(csrNonceSpan.data_equal(csrNonce), CHIP_ERROR_INVALID_ARGUMENT);

    // Validate overall attestation signature on attestation information

    P256ECDSASignature signature;

    // SetLength will fail if signature doesn't fit

    ReturnErrorOnFailure(signature.SetLength(attestationSignatureBuffer.size()));

    memcpy(signature.Bytes(), attestationSignatureBuffer.data(), attestationSignatureBuffer.size());

    ReturnErrorOnFailure(ValidateAttestationSignature(dacPublicKey, nocsrElementsBuffer, attestationChallengeBuffer, signature));

    return CHIP_NO_ERROR;

}

void DefaultDACVerifier::CheckForRevokedDACChain(const AttestationInfo & info,

                                                 Callback::Callback<OnAttestationInformationVerification> * onCompletion)

{

    if (mRevocationDelegate != nullptr)

    {

        mRevocationDelegate->CheckForRevokedDACChain(info, onCompletion);

    }

    else

    {

        ChipLogProgress(NotSpecified, "WARNING: No revocation delegate available. Revocation checks will be skipped!");

        onCompletion->mCall(onCompletion->mContext, info, AttestationVerificationResult::kSuccess);

    }

}

bool CsaCdKeysTrustStore::IsCdTestKey(const ByteSpan & kid) const

{

    return kid.data_equal(ByteSpan{ gTestCdPubkeyKid });

}

CHIP_ERROR CsaCdKeysTrustStore::AddTrustedKey(const ByteSpan & kid, const Crypto::P256PublicKey & pubKey)

{

    VerifyOrReturnError(kid.size() <= SingleKeyEntry::kMaxKidSize, CHIP_ERROR_INVALID_ARGUMENT);

    VerifyOrReturnError(!kid.empty(), CHIP_ERROR_INVALID_ARGUMENT);

    VerifyOrReturnError(mNumTrustedKeys != kMaxNumTrustedKeys, CHIP_ERROR_NO_MEMORY);

    auto & entry = mTrustedKeys[mNumTrustedKeys];

    entry.kidSize = kid.size();

    memcpy(&entry.kidBuffer[0], kid.data(), kid.size());

    entry.publicKey = pubKey;

    ++mNumTrustedKeys;

    return CHIP_NO_ERROR;

}

CHIP_ERROR CsaCdKeysTrustStore::AddTrustedKey(const ByteSpan & derCertBytes)

{

    uint8_t kidBuf[Crypto::kSubjectKeyIdentifierLength] = { 0 };

    MutableByteSpan kidSpan{ kidBuf };

    P256PublicKey pubKey;

    VerifyOrReturnError(CHIP_NO_ERROR == Crypto::ExtractSKIDFromX509Cert(derCertBytes, kidSpan), CHIP_ERROR_INVALID_ARGUMENT);

    VerifyOrReturnError(CHIP_NO_ERROR == Crypto::ExtractPubkeyFromX509Cert(derCertBytes, pubKey), CHIP_ERROR_INVALID_ARGUMENT);

    if (!IsCdTestKey(kidSpan))

    {

        // Verify cert against CSA CD root of trust.

        CertificateChainValidationResult chainValidationResult;

        VerifyOrReturnError(CHIP_NO_ERROR ==

                                ValidateCertificateChain(gCdRootCert, sizeof(gCdRootCert), nullptr, 0, derCertBytes.data(),

                                                         derCertBytes.size(), chainValidationResult),

                            CHIP_ERROR_INVALID_ARGUMENT);

        VerifyOrReturnError(chainValidationResult == CertificateChainValidationResult::kSuccess, CHIP_ERROR_INVALID_ARGUMENT);

    }

    return AddTrustedKey(kidSpan, pubKey);

}

CHIP_ERROR CsaCdKeysTrustStore::LookupVerifyingKey(const ByteSpan & kid, Crypto::P256PublicKey & outPubKey) const

{

    // First, search for the well known keys

    for (auto & cdSigningKey : gCdSigningKeys)

    {

        if (kid.data_equal(cdSigningKey.mKid))

        {

            outPubKey = cdSigningKey.mPubkey;

            return CHIP_NO_ERROR;

        }