| /* |
| * |
| * 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 <crypto/CHIPCryptoPAL.h> |
| #include <string.h> |
| |
| #include <lib/core/CHIPError.h> |
| #include <lib/support/CodeUtils.h> |
| #include <lib/support/ScopedBuffer.h> |
| #include <lib/support/Span.h> |
| |
| namespace chip { |
| namespace TestCerts { |
| extern const ByteSpan sTestCert_PAA_FFF1_Cert; |
| extern const ByteSpan sTestCert_PAA_NoVID_Cert; |
| } // namespace TestCerts |
| } // namespace chip |
| |
| using namespace chip::Crypto; |
| |
| namespace chip { |
| namespace Credentials { |
| |
| namespace { |
| |
| // As per specifications section 11.22.5.1. Constant RESP_MAX |
| constexpr size_t kMaxResponseLength = 900; |
| |
| static const ByteSpan kTestPaaRoots[] = { |
| TestCerts::sTestCert_PAA_FFF1_Cert, |
| TestCerts::sTestCert_PAA_NoVID_Cert, |
| }; |
| |
| // 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[65] = { 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[20] = { 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[517] = { |
| 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----- |
| // MIICCDCCAa2gAwIBAgIHY3NhY2RzMTAKBggqhkjOPQQDAjBSMQwwCgYDVQQKDAND |
| // U0ExLDAqBgNVBAMMI01hdHRlciBDZXJ0aWZpY2F0aW9uIGFuZCBUZXN0aW5nIENB |
| // MRQwEgYKKwYBBAGConwCAQwEQzVBMDAgFw0yMjA4MTExOTMxMTVaGA8yMDcyMDcy |
| // OTE5MzExNVowWDEMMAoGA1UECgwDQ1NBMTIwMAYDVQQDDClDZXJ0aWZpY2F0aW9u |
| // IERlY2xhcmF0aW9uIFNpZ25pbmcgS2V5IDAwMTEUMBIGCisGAQQBgqJ8AgEMBEM1 |
| // QTAwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAARbW8Ou1rqjg/3Pm51ac/rqfmXr |
| // WSfBxcArHPpLi9trm36yUlE/I/IqWDOdyK24gEYKySHTdte5cMUMO+bm0jbwo2Yw |
| // ZDASBgNVHRMBAf8ECDAGAQH/AgEAMA4GA1UdDwEB/wQEAwIBhjAdBgNVHQ4EFgQU |
| // g/rXgegtAYtPFPChx/aEAYzF0Z8wHwYDVR0jBBgwFoAUl+Rp0MUEFMJvxwH3fpR3 |
| // OQmN9qUwCgYIKoZIzj0EAwIDSQAwRgIhAIbSu8KoWTj5792UxtJ/uSgQXVTLRRsm |
| // 09ys2m37JxDvAiEA8WMKDbRbwOtkabIyqwDgmiR3KwkyYwaqN4GPsRKfxwQ= |
| // -----END CERTIFICATE----- |
| // |
| constexpr uint8_t gCdSigningKey001PubkeyBytes[65] = { |
| 0x04, 0x5b, 0x5b, 0xc3, 0xae, 0xd6, 0xba, 0xa3, 0x83, 0xfd, 0xcf, 0x9b, 0x9d, 0x5a, 0x73, 0xfa, 0xea, |
| 0x7e, 0x65, 0xeb, 0x59, 0x27, 0xc1, 0xc5, 0xc0, 0x2b, 0x1c, 0xfa, 0x4b, 0x8b, 0xdb, 0x6b, 0x9b, 0x7e, |
| 0xb2, 0x52, 0x51, 0x3f, 0x23, 0xf2, 0x2a, 0x58, 0x33, 0x9d, 0xc8, 0xad, 0xb8, 0x80, 0x46, 0x0a, 0xc9, |
| 0x21, 0xd3, 0x76, 0xd7, 0xb9, 0x70, 0xc5, 0x0c, 0x3b, 0xe6, 0xe6, 0xd2, 0x36, 0xf0 |
| }; |
| |
| constexpr uint8_t gCdSigningKey001Kid[20] = { 0x83, 0xfa, 0xd7, 0x81, 0xe8, 0x2d, 0x01, 0x8b, 0x4f, 0x14, |
| 0xf0, 0xa1, 0xc7, 0xf6, 0x84, 0x01, 0x8c, 0xc5, 0xd1, 0x9f }; |
| |
| std::array<ByteSpan, 2> gCdKids = { ByteSpan{ gTestCdPubkeyKid }, ByteSpan{ gCdSigningKey001Kid } }; |
| std::array<Crypto::P256PublicKey, 2> gCdPubkeys = { Crypto::P256PublicKey{ gTestCdPubkeyBytes }, |
| Crypto::P256PublicKey{ gCdSigningKey001PubkeyBytes } }; |
| |
| const ArrayAttestationTrustStore kTestAttestationTrustStore{ &kTestPaaRoots[0], ArraySize(kTestPaaRoots) }; |
| |
| 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; |
| } |
| } |
| } // namespace |
| |
| void DefaultDACVerifier::VerifyAttestationInformation(const DeviceAttestationVerifier::AttestationInfo & info, |
| Callback::Callback<OnAttestationInformationVerification> * onCompletion) |
| { |
| AttestationVerificationResult attestationError = AttestationVerificationResult::kSuccess; |
| |
| Platform::ScopedMemoryBuffer<uint8_t> paaCert; |
| MutableByteSpan paaDerBuffer; |
| AttestationCertVidPid dacVidPid; |
| AttestationCertVidPid paiVidPid; |
| AttestationCertVidPid paaVidPid; |
| |
| VerifyOrExit(!info.attestationElementsBuffer.empty() && !info.attestationChallengeBuffer.empty() && |
| !info.attestationSignatureBuffer.empty() && !info.paiDerBuffer.empty() && !info.dacDerBuffer.empty() && |
| !info.attestationNonceBuffer.empty() && onCompletion != nullptr, |
| attestationError = AttestationVerificationResult::kInvalidArgument); |
| |
| VerifyOrExit(info.attestationElementsBuffer.size() <= kMaxResponseLength, |
| attestationError = AttestationVerificationResult::kInvalidArgument); |
| |
| // Ensure PAI is present |
| VerifyOrExit(!info.paiDerBuffer.empty(), attestationError = AttestationVerificationResult::kPaiMissing); |
| |
| // 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); |
| } |
| } |
| |
| { |
| P256PublicKey remoteManufacturerPubkey; |
| P256ECDSASignature deviceSignature; |
| |
| VerifyOrExit(ExtractPubkeyFromX509Cert(info.dacDerBuffer, remoteManufacturerPubkey) == CHIP_NO_ERROR, |
| attestationError = AttestationVerificationResult::kDacFormatInvalid); |
| |
| // Validate overall attestation signature on attestation information |
| // 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); |
| } |
| |
| { |
| uint8_t akidBuf[Crypto::kAuthorityKeyIdentifierLength]; |
| MutableByteSpan akid(akidBuf); |
| constexpr size_t paaCertAllocatedLen = kMaxDERCertLength; |
| CHIP_ERROR err = CHIP_NO_ERROR; |
| |
| VerifyOrExit(ExtractAKIDFromX509Cert(info.paiDerBuffer, akid) == CHIP_NO_ERROR, |
| attestationError = AttestationVerificationResult::kPaiFormatInvalid); |
| |
| VerifyOrExit(paaCert.Alloc(paaCertAllocatedLen), attestationError = AttestationVerificationResult::kNoMemory); |
| |
| paaDerBuffer = MutableByteSpan(paaCert.Get(), paaCertAllocatedLen); |
| err = mAttestationTrustStore->GetProductAttestationAuthorityCert(akid, paaDerBuffer); |
| VerifyOrExit(err == CHIP_NO_ERROR || err == CHIP_ERROR_NOT_IMPLEMENTED, |
| attestationError = AttestationVerificationResult::kPaaNotFound); |
| |
| if (err == CHIP_ERROR_NOT_IMPLEMENTED) |
| { |
| VerifyOrExit(kTestAttestationTrustStore.GetProductAttestationAuthorityCert(akid, paaDerBuffer) == CHIP_NO_ERROR, |
| attestationError = AttestationVerificationResult::kPaaNotFound); |
| } |
| |
| 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); |
| |
| // Disallow test key if support not enabled |
| if (mCdKeysTrustStore.IsCdTestKey(kid) && !IsCdTestKeySupported()) |
| { |
| return AttestationVerificationResult::kCertificationDeclarationNoCertificateFound; |
| } |
| |
| VerifyOrReturnError(CMS_Verify(cmsEnvelopeBuffer, verifyingKey, certDeclBuffer) == CHIP_NO_ERROR, |
| AttestationVerificationResult::kCertificationDeclarationInvalidSignature); |
| |
| 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 |
| } |
| |
| // 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); |
| } |
| |
| 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; |
| } |
| |
| bool CsaCdKeysTrustStore::IsCdTestKey(const ByteSpan & kid) const |
| { |
| return kid.data_equal(ByteSpan{ gTestCdPubkeyKid }); |
| } |
| |
| CHIP_ERROR CsaCdKeysTrustStore::AddTrustedKey(const ByteSpan & kid, const Crypto::P256PublicKey & pubKey) |
| { |
| ReturnErrorCodeIf(kid.size() > SingleKeyEntry::kMaxKidSize, CHIP_ERROR_INVALID_ARGUMENT); |
| ReturnErrorCodeIf(kid.empty(), CHIP_ERROR_INVALID_ARGUMENT); |
| ReturnErrorCodeIf(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 (size_t keyIdx = 0; keyIdx < gCdKids.size(); keyIdx++) |
| { |
| if (kid.data_equal(gCdKids[keyIdx])) |
| { |
| outPubKey = gCdPubkeys[keyIdx]; |
| return CHIP_NO_ERROR; |
| } |
| } |
| |
| // Seconds, search externally added keys |
| for (size_t keyIdx = 0; keyIdx < mNumTrustedKeys; keyIdx++) |
| { |
| auto & entry = mTrustedKeys[keyIdx]; |
| if (kid.data_equal(entry.GetKid())) |
| { |
| outPubKey = entry.publicKey; |
| return CHIP_NO_ERROR; |
| } |
| } |
| |
| // If we get here, the desired key was not found |
| return CHIP_ERROR_KEY_NOT_FOUND; |
| } |
| |
| const AttestationTrustStore * GetTestAttestationTrustStore() |
| { |
| return &kTestAttestationTrustStore; |
| } |
| |
| DeviceAttestationVerifier * GetDefaultDACVerifier(const AttestationTrustStore * paaRootStore) |
| { |
| static DefaultDACVerifier defaultDACVerifier{ paaRootStore }; |
| |
| return &defaultDACVerifier; |
| } |
| |
| } // namespace Credentials |
| } // namespace chip |
