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348 lines
15 KiB
348 lines
15 KiB
/*
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* Copyright 2020, 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 "FakeSecureHardwareProxy"
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#include "FakeSecureHardwareProxy.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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FakeSecureHardwareProvisioningProxy::FakeSecureHardwareProvisioningProxy() {}
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FakeSecureHardwareProvisioningProxy::~FakeSecureHardwareProvisioningProxy() {}
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bool FakeSecureHardwareProvisioningProxy::shutdown() {
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LOG(INFO) << "FakeSecureHardwarePresentationProxy shutdown";
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return true;
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}
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bool FakeSecureHardwareProvisioningProxy::initialize(bool testCredential) {
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LOG(INFO) << "FakeSecureHardwareProvisioningProxy created, 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 FakeSecureHardwareProvisioningProxy::initializeForUpdate(
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bool testCredential, string docType, vector<uint8_t> encryptedCredentialKeys) {
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return eicProvisioningInitForUpdate(&ctx_, testCredential, docType.c_str(),
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encryptedCredentialKeys.data(),
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encryptedCredentialKeys.size());
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}
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// Returns public key certificate.
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optional<vector<uint8_t>> FakeSecureHardwareProvisioningProxy::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(&ctx_, challenge.data(), challenge.size(),
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applicationId.data(), applicationId.size(),
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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 FakeSecureHardwareProvisioningProxy::startPersonalization(
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int accessControlProfileCount, vector<int> entryCounts, const string& docType,
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size_t expectedProofOfProvisioningSize) {
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if (!eicProvisioningStartPersonalization(&ctx_, accessControlProfileCount, entryCounts.data(),
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entryCounts.size(), docType.c_str(),
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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>> FakeSecureHardwareProvisioningProxy::addAccessControlProfile(
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int id, const vector<uint8_t>& readerCertificate, bool userAuthenticationRequired,
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uint64_t timeoutMillis, uint64_t secureUserId) {
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vector<uint8_t> mac(28);
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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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return {};
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}
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return mac;
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}
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bool FakeSecureHardwareProvisioningProxy::beginAddEntry(const vector<int>& accessControlProfileIds,
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const string& nameSpace, const string& name,
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uint64_t entrySize) {
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uint8_t scratchSpace[512];
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return eicProvisioningBeginAddEntry(&ctx_, accessControlProfileIds.data(),
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accessControlProfileIds.size(), nameSpace.c_str(),
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name.c_str(), entrySize, scratchSpace, sizeof scratchSpace);
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}
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// Returns encryptedContent.
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optional<vector<uint8_t>> FakeSecureHardwareProvisioningProxy::addEntryValue(
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const vector<int>& accessControlProfileIds, const string& nameSpace, const string& name,
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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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eicEncryptedContent.resize(content.size() + 28);
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if (!eicProvisioningAddEntryValue(
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&ctx_, accessControlProfileIds.data(), accessControlProfileIds.size(),
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nameSpace.c_str(), name.c_str(), content.data(), content.size(),
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eicEncryptedContent.data(), 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>> FakeSecureHardwareProvisioningProxy::finishAddingEntries() {
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vector<uint8_t> signatureOfToBeSigned(EIC_ECDSA_P256_SIGNATURE_SIZE);
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if (!eicProvisioningFinishAddingEntries(&ctx_, 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>> FakeSecureHardwareProvisioningProxy::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(&ctx_, docType.c_str(),
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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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FakeSecureHardwarePresentationProxy::FakeSecureHardwarePresentationProxy() {}
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FakeSecureHardwarePresentationProxy::~FakeSecureHardwarePresentationProxy() {}
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bool FakeSecureHardwarePresentationProxy::initialize(bool testCredential, string docType,
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vector<uint8_t> encryptedCredentialKeys) {
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LOG(INFO) << "FakeSecureHardwarePresentationProxy created, sizeof(EicPresentation): "
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<< sizeof(EicPresentation);
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return eicPresentationInit(&ctx_, testCredential, docType.c_str(),
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encryptedCredentialKeys.data(), 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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FakeSecureHardwarePresentationProxy::generateSigningKeyPair(string docType, 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(&ctx_, docType.c_str(), 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>> FakeSecureHardwarePresentationProxy::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> FakeSecureHardwarePresentationProxy::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 FakeSecureHardwarePresentationProxy::shutdown() {
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LOG(INFO) << "FakeSecureHardwarePresentationProxy shutdown";
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return true;
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}
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bool FakeSecureHardwarePresentationProxy::pushReaderCert(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 FakeSecureHardwarePresentationProxy::validateRequestMessage(
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const vector<uint8_t>& sessionTranscript, const vector<uint8_t>& requestMessage,
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int coseSignAlg, const vector<uint8_t>& readerSignatureOfToBeSigned) {
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return eicPresentationValidateRequestMessage(
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&ctx_, sessionTranscript.data(), sessionTranscript.size(), requestMessage.data(),
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requestMessage.size(), coseSignAlg, readerSignatureOfToBeSigned.data(),
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readerSignatureOfToBeSigned.size());
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}
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bool FakeSecureHardwarePresentationProxy::setAuthToken(
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uint64_t challenge, uint64_t secureUserId, uint64_t authenticatorId,
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int hardwareAuthenticatorType, uint64_t timeStamp, const vector<uint8_t>& mac,
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uint64_t verificationTokenChallenge, uint64_t verificationTokenTimestamp,
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int verificationTokenSecurityLevel, const vector<uint8_t>& verificationTokenMac) {
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return eicPresentationSetAuthToken(&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> FakeSecureHardwarePresentationProxy::validateAccessControlProfile(
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int id, const vector<uint8_t>& readerCertificate, bool userAuthenticationRequired,
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int timeoutMillis, uint64_t secureUserId, const vector<uint8_t>& mac) {
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bool accessGranted = false;
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if (!eicPresentationValidateAccessControlProfile(&ctx_, id, readerCertificate.data(),
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readerCertificate.size(),
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userAuthenticationRequired, timeoutMillis,
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secureUserId, mac.data(), &accessGranted)) {
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return {};
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}
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return accessGranted;
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}
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bool FakeSecureHardwarePresentationProxy::startRetrieveEntries() {
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return eicPresentationStartRetrieveEntries(&ctx_);
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}
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bool FakeSecureHardwarePresentationProxy::calcMacKey(
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const vector<uint8_t>& sessionTranscript, const vector<uint8_t>& readerEphemeralPublicKey,
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const vector<uint8_t>& signingKeyBlob, const string& docType,
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unsigned int numNamespacesWithValues, size_t expectedProofOfProvisioningSize) {
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if (signingKeyBlob.size() != 60) {
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eicDebug("Unexpected size %zd of signingKeyBlob, expected 60", signingKeyBlob.size());
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return false;
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}
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return eicPresentationCalcMacKey(&ctx_, sessionTranscript.data(), sessionTranscript.size(),
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readerEphemeralPublicKey.data(), signingKeyBlob.data(),
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docType.c_str(), numNamespacesWithValues,
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expectedProofOfProvisioningSize);
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}
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AccessCheckResult FakeSecureHardwarePresentationProxy::startRetrieveEntryValue(
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const string& nameSpace, const string& name, unsigned int newNamespaceNumEntries,
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int32_t entrySize, const vector<int32_t>& accessControlProfileIds) {
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uint8_t scratchSpace[512];
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EicAccessCheckResult result = eicPresentationStartRetrieveEntryValue(
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&ctx_, nameSpace.c_str(), name.c_str(), newNamespaceNumEntries, entrySize,
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accessControlProfileIds.data(), accessControlProfileIds.size(), scratchSpace,
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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>> FakeSecureHardwarePresentationProxy::retrieveEntryValue(
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const vector<uint8_t>& encryptedContent, const string& nameSpace, const string& name,
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const vector<int32_t>& accessControlProfileIds) {
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uint8_t scratchSpace[512];
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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(), content.data(),
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nameSpace.c_str(), name.c_str(), accessControlProfileIds.data(),
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accessControlProfileIds.size(), scratchSpace, 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>> FakeSecureHardwarePresentationProxy::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>> FakeSecureHardwarePresentationProxy::deleteCredential(
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const string& docType, const vector<uint8_t>& challenge, bool includeChallenge,
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size_t proofOfDeletionCborSize) {
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vector<uint8_t> signatureOfToBeSigned(EIC_ECDSA_P256_SIGNATURE_SIZE);
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if (!eicPresentationDeleteCredential(&ctx_, docType.c_str(), challenge.data(), challenge.size(),
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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>> FakeSecureHardwarePresentationProxy::proveOwnership(
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const string& docType, bool testCredential, const vector<uint8_t>& challenge,
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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(), 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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