413 lines
15 KiB
C++
413 lines
15 KiB
C++
/*
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* Copyright 2021, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "RemoteSecureHardwareProxy"
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#include "RemoteSecureHardwareProxy.h"
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#include <android/hardware/identity/support/IdentityCredentialSupport.h>
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#include <android-base/logging.h>
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#include <android-base/stringprintf.h>
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#include <string.h>
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#include <openssl/sha.h>
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#include <openssl/aes.h>
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#include <openssl/bn.h>
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#include <openssl/crypto.h>
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#include <openssl/ec.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/hkdf.h>
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#include <openssl/hmac.h>
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#include <openssl/objects.h>
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#include <openssl/pem.h>
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#include <openssl/pkcs12.h>
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#include <openssl/rand.h>
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#include <openssl/x509.h>
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#include <openssl/x509_vfy.h>
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#include <libeic.h>
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using ::std::optional;
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using ::std::string;
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using ::std::tuple;
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using ::std::vector;
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namespace android::hardware::identity {
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// ----------------------------------------------------------------------
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RemoteSecureHardwareProvisioningProxy::RemoteSecureHardwareProvisioningProxy() {
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}
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RemoteSecureHardwareProvisioningProxy::
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~RemoteSecureHardwareProvisioningProxy() {}
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bool RemoteSecureHardwareProvisioningProxy::shutdown() {
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LOG(INFO) << "RemoteSecureHardwarePresentationProxy shutdown";
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return true;
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}
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bool RemoteSecureHardwareProvisioningProxy::initialize(bool testCredential) {
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LOG(INFO) << "RemoteSecureHardwareProvisioningProxy created, "
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"sizeof(EicProvisioning): "
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<< sizeof(EicProvisioning);
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return eicProvisioningInit(&ctx_, testCredential);
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}
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bool RemoteSecureHardwareProvisioningProxy::initializeForUpdate(
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bool testCredential, string docType,
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vector<uint8_t> encryptedCredentialKeys) {
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return eicProvisioningInitForUpdate(
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&ctx_, testCredential, docType.c_str(), docType.size(),
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encryptedCredentialKeys.data(), encryptedCredentialKeys.size());
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}
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// Returns public key certificate.
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optional<vector<uint8_t>>
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RemoteSecureHardwareProvisioningProxy::createCredentialKey(
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const vector<uint8_t>& challenge, const vector<uint8_t>& applicationId) {
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uint8_t publicKeyCert[4096];
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size_t publicKeyCertSize = sizeof publicKeyCert;
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if (!eicProvisioningCreateCredentialKey(
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&ctx_, challenge.data(), challenge.size(), applicationId.data(),
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applicationId.size(), publicKeyCert, &publicKeyCertSize)) {
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return {};
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}
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vector<uint8_t> pubKeyCert(publicKeyCertSize);
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memcpy(pubKeyCert.data(), publicKeyCert, publicKeyCertSize);
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return pubKeyCert;
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}
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bool RemoteSecureHardwareProvisioningProxy::startPersonalization(
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int accessControlProfileCount, vector<int> entryCounts,
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const string& docType, size_t expectedProofOfProvisioningSize) {
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if (!eicProvisioningStartPersonalization(
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&ctx_, accessControlProfileCount, entryCounts.data(),
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entryCounts.size(), docType.c_str(), docType.size(),
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expectedProofOfProvisioningSize)) {
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return false;
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}
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return true;
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}
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// Returns MAC (28 bytes).
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optional<vector<uint8_t>>
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RemoteSecureHardwareProvisioningProxy::addAccessControlProfile(
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int id, const vector<uint8_t>& readerCertificate,
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bool userAuthenticationRequired, uint64_t timeoutMillis,
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uint64_t secureUserId) {
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vector<uint8_t> mac(28);
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uint8_t scratchSpace[512];
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if (!eicProvisioningAddAccessControlProfile(
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&ctx_, id, readerCertificate.data(), readerCertificate.size(),
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userAuthenticationRequired, timeoutMillis, secureUserId, mac.data(),
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scratchSpace, sizeof(scratchSpace))) {
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return {};
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}
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return mac;
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}
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bool RemoteSecureHardwareProvisioningProxy::beginAddEntry(
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const vector<int>& accessControlProfileIds, const string& nameSpace,
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const string& name, uint64_t entrySize) {
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uint8_t scratchSpace[512];
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vector<uint8_t> uint8AccessControlProfileIds;
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for (size_t i = 0; i < accessControlProfileIds.size(); i++) {
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uint8AccessControlProfileIds.push_back(accessControlProfileIds[i] & 0xFF);
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}
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return eicProvisioningBeginAddEntry(
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&ctx_, uint8AccessControlProfileIds.data(),
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uint8AccessControlProfileIds.size(), nameSpace.c_str(), nameSpace.size(),
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name.c_str(), name.size(), entrySize, scratchSpace, sizeof(scratchSpace));
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}
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// Returns encryptedContent.
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optional<vector<uint8_t>> RemoteSecureHardwareProvisioningProxy::addEntryValue(
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const vector<int>& accessControlProfileIds, const string& nameSpace,
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const string& name, const vector<uint8_t>& content) {
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vector<uint8_t> eicEncryptedContent;
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uint8_t scratchSpace[512];
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vector<uint8_t> uint8AccessControlProfileIds;
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for (size_t i = 0; i < accessControlProfileIds.size(); i++) {
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uint8AccessControlProfileIds.push_back(accessControlProfileIds[i] & 0xFF);
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}
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eicEncryptedContent.resize(content.size() + 28);
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if (!eicProvisioningAddEntryValue(&ctx_, uint8AccessControlProfileIds.data(),
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uint8AccessControlProfileIds.size(),
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nameSpace.c_str(), nameSpace.size(),
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name.c_str(), name.size(), content.data(),
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content.size(), eicEncryptedContent.data(),
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scratchSpace, sizeof(scratchSpace))) {
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return {};
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}
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return eicEncryptedContent;
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}
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// Returns signatureOfToBeSigned (EIC_ECDSA_P256_SIGNATURE_SIZE bytes).
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optional<vector<uint8_t>>
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RemoteSecureHardwareProvisioningProxy::finishAddingEntries() {
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vector<uint8_t> signatureOfToBeSigned(EIC_ECDSA_P256_SIGNATURE_SIZE);
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if (!eicProvisioningFinishAddingEntries(&ctx_,
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signatureOfToBeSigned.data())) {
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return {};
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}
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return signatureOfToBeSigned;
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}
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// Returns encryptedCredentialKeys.
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optional<vector<uint8_t>>
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RemoteSecureHardwareProvisioningProxy::finishGetCredentialData(
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const string& docType) {
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vector<uint8_t> encryptedCredentialKeys(116);
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size_t size = encryptedCredentialKeys.size();
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if (!eicProvisioningFinishGetCredentialData(
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&ctx_, docType.c_str(), docType.size(),
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encryptedCredentialKeys.data(), &size)) {
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return {};
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}
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encryptedCredentialKeys.resize(size);
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return encryptedCredentialKeys;
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}
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// ----------------------------------------------------------------------
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RemoteSecureHardwarePresentationProxy::RemoteSecureHardwarePresentationProxy() {
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}
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RemoteSecureHardwarePresentationProxy::
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~RemoteSecureHardwarePresentationProxy() {}
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bool RemoteSecureHardwarePresentationProxy::initialize(
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bool testCredential, string docType,
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vector<uint8_t> encryptedCredentialKeys) {
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LOG(INFO) << "RemoteSecureHardwarePresentationProxy created, "
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"sizeof(EicPresentation): "
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<< sizeof(EicPresentation);
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return eicPresentationInit(&ctx_, testCredential, docType.c_str(),
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docType.size(), encryptedCredentialKeys.data(),
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encryptedCredentialKeys.size());
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}
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// Returns publicKeyCert (1st component) and signingKeyBlob (2nd component)
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optional<pair<vector<uint8_t>, vector<uint8_t>>>
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RemoteSecureHardwarePresentationProxy::generateSigningKeyPair(string docType,
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time_t now) {
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uint8_t publicKeyCert[512];
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size_t publicKeyCertSize = sizeof(publicKeyCert);
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vector<uint8_t> signingKeyBlob(60);
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if (!eicPresentationGenerateSigningKeyPair(
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&ctx_, docType.c_str(), docType.size(), now, publicKeyCert,
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&publicKeyCertSize, signingKeyBlob.data())) {
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return {};
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}
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vector<uint8_t> cert;
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cert.resize(publicKeyCertSize);
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memcpy(cert.data(), publicKeyCert, publicKeyCertSize);
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return std::make_pair(cert, signingKeyBlob);
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}
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// Returns private key
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optional<vector<uint8_t>>
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RemoteSecureHardwarePresentationProxy::createEphemeralKeyPair() {
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vector<uint8_t> priv(EIC_P256_PRIV_KEY_SIZE);
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if (!eicPresentationCreateEphemeralKeyPair(&ctx_, priv.data())) {
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return {};
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}
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return priv;
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}
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optional<uint64_t>
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RemoteSecureHardwarePresentationProxy::createAuthChallenge() {
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uint64_t challenge;
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if (!eicPresentationCreateAuthChallenge(&ctx_, &challenge)) {
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return {};
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}
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return challenge;
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}
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bool RemoteSecureHardwarePresentationProxy::shutdown() {
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LOG(INFO) << "RemoteSecureHardwarePresentationProxy shutdown";
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return true;
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}
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bool RemoteSecureHardwarePresentationProxy::pushReaderCert(
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const vector<uint8_t>& certX509) {
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return eicPresentationPushReaderCert(&ctx_, certX509.data(), certX509.size());
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}
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bool RemoteSecureHardwarePresentationProxy::validateRequestMessage(
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const vector<uint8_t>& sessionTranscript,
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const vector<uint8_t>& requestMessage, int coseSignAlg,
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const vector<uint8_t>& readerSignatureOfToBeSigned) {
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return eicPresentationValidateRequestMessage(
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&ctx_, sessionTranscript.data(), sessionTranscript.size(),
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requestMessage.data(), requestMessage.size(), coseSignAlg,
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readerSignatureOfToBeSigned.data(), readerSignatureOfToBeSigned.size());
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}
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bool RemoteSecureHardwarePresentationProxy::setAuthToken(
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uint64_t challenge, uint64_t secureUserId, uint64_t authenticatorId,
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int hardwareAuthenticatorType, uint64_t timeStamp,
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const vector<uint8_t>& mac, uint64_t verificationTokenChallenge,
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uint64_t verificationTokenTimestamp, int verificationTokenSecurityLevel,
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const vector<uint8_t>& verificationTokenMac) {
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return eicPresentationSetAuthToken(
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&ctx_, challenge, secureUserId, authenticatorId,
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hardwareAuthenticatorType, timeStamp, mac.data(), mac.size(),
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verificationTokenChallenge, verificationTokenTimestamp,
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verificationTokenSecurityLevel, verificationTokenMac.data(),
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verificationTokenMac.size());
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}
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optional<bool>
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RemoteSecureHardwarePresentationProxy::validateAccessControlProfile(
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int id, const vector<uint8_t>& readerCertificate,
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bool userAuthenticationRequired, int timeoutMillis, uint64_t secureUserId,
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const vector<uint8_t>& mac) {
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bool accessGranted = false;
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uint8_t scratchSpace[512];
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if (!eicPresentationValidateAccessControlProfile(
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&ctx_, id, readerCertificate.data(), readerCertificate.size(),
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userAuthenticationRequired, timeoutMillis, secureUserId, mac.data(),
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&accessGranted, scratchSpace, sizeof(scratchSpace))) {
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return {};
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}
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return accessGranted;
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}
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bool RemoteSecureHardwarePresentationProxy::startRetrieveEntries() {
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return eicPresentationStartRetrieveEntries(&ctx_);
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}
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bool RemoteSecureHardwarePresentationProxy::calcMacKey(
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const vector<uint8_t>& sessionTranscript,
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const vector<uint8_t>& readerEphemeralPublicKey,
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const vector<uint8_t>& signingKeyBlob, const string& docType,
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unsigned int numNamespacesWithValues,
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size_t expectedProofOfProvisioningSize) {
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if (signingKeyBlob.size() != 60) {
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eicDebug("Unexpected size %zd of signingKeyBlob, expected 60",
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signingKeyBlob.size());
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return false;
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}
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return eicPresentationCalcMacKey(
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&ctx_, sessionTranscript.data(), sessionTranscript.size(),
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readerEphemeralPublicKey.data(), signingKeyBlob.data(), docType.c_str(),
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docType.size(), numNamespacesWithValues, expectedProofOfProvisioningSize);
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}
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AccessCheckResult
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RemoteSecureHardwarePresentationProxy::startRetrieveEntryValue(
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const string& nameSpace, const string& name,
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unsigned int newNamespaceNumEntries, int32_t entrySize,
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const vector<int32_t>& accessControlProfileIds) {
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uint8_t scratchSpace[512];
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vector<uint8_t> uint8AccessControlProfileIds;
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for (size_t i = 0; i < accessControlProfileIds.size(); i++) {
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uint8AccessControlProfileIds.push_back(accessControlProfileIds[i] & 0xFF);
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}
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EicAccessCheckResult result = eicPresentationStartRetrieveEntryValue(
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&ctx_, nameSpace.c_str(), nameSpace.size(), name.c_str(), name.size(),
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newNamespaceNumEntries, entrySize, uint8AccessControlProfileIds.data(),
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uint8AccessControlProfileIds.size(), scratchSpace, sizeof(scratchSpace));
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switch (result) {
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case EIC_ACCESS_CHECK_RESULT_OK:
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return AccessCheckResult::kOk;
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case EIC_ACCESS_CHECK_RESULT_NO_ACCESS_CONTROL_PROFILES:
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return AccessCheckResult::kNoAccessControlProfiles;
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case EIC_ACCESS_CHECK_RESULT_FAILED:
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return AccessCheckResult::kFailed;
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case EIC_ACCESS_CHECK_RESULT_USER_AUTHENTICATION_FAILED:
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return AccessCheckResult::kUserAuthenticationFailed;
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case EIC_ACCESS_CHECK_RESULT_READER_AUTHENTICATION_FAILED:
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return AccessCheckResult::kReaderAuthenticationFailed;
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}
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eicDebug("Unknown result with code %d, returning kFailed", (int)result);
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return AccessCheckResult::kFailed;
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}
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optional<vector<uint8_t>>
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RemoteSecureHardwarePresentationProxy::retrieveEntryValue(
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const vector<uint8_t>& encryptedContent, const string& nameSpace,
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const string& name, const vector<int32_t>& accessControlProfileIds) {
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uint8_t scratchSpace[512];
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vector<uint8_t> uint8AccessControlProfileIds;
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for (size_t i = 0; i < accessControlProfileIds.size(); i++) {
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uint8AccessControlProfileIds.push_back(accessControlProfileIds[i] & 0xFF);
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}
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vector<uint8_t> content;
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content.resize(encryptedContent.size() - 28);
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if (!eicPresentationRetrieveEntryValue(
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&ctx_, encryptedContent.data(), encryptedContent.size(),
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content.data(), nameSpace.c_str(), nameSpace.size(), name.c_str(),
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name.size(), uint8AccessControlProfileIds.data(),
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uint8AccessControlProfileIds.size(), scratchSpace,
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sizeof(scratchSpace))) {
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return {};
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}
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return content;
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}
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optional<vector<uint8_t>>
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RemoteSecureHardwarePresentationProxy::finishRetrieval() {
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vector<uint8_t> mac(32);
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size_t macSize = 32;
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if (!eicPresentationFinishRetrieval(&ctx_, mac.data(), &macSize)) {
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return {};
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}
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mac.resize(macSize);
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return mac;
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}
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optional<vector<uint8_t>>
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RemoteSecureHardwarePresentationProxy::deleteCredential(
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const string& docType, const vector<uint8_t>& challenge,
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bool includeChallenge, size_t proofOfDeletionCborSize) {
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vector<uint8_t> signatureOfToBeSigned(EIC_ECDSA_P256_SIGNATURE_SIZE);
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if (!eicPresentationDeleteCredential(
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&ctx_, docType.c_str(), docType.size(), challenge.data(),
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challenge.size(), includeChallenge, proofOfDeletionCborSize,
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signatureOfToBeSigned.data())) {
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return {};
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}
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return signatureOfToBeSigned;
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}
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optional<vector<uint8_t>> RemoteSecureHardwarePresentationProxy::proveOwnership(
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const string& docType, bool testCredential,
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const vector<uint8_t>& challenge, size_t proofOfOwnershipCborSize) {
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vector<uint8_t> signatureOfToBeSigned(EIC_ECDSA_P256_SIGNATURE_SIZE);
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if (!eicPresentationProveOwnership(&ctx_, docType.c_str(), docType.size(),
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testCredential, challenge.data(),
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challenge.size(), proofOfOwnershipCborSize,
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signatureOfToBeSigned.data())) {
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return {};
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}
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return signatureOfToBeSigned;
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}
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} // namespace android::hardware::identity
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