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/*
* Copyright (C) 2020 The Android Open Source Project
*
* 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.
*/
#define LOG_TAG "TestCredentialTests"
#include <aidl/Gtest.h>
#include <aidl/Vintf.h>
#include <aidl/android/hardware/keymaster/HardwareAuthToken.h>
#include <aidl/android/hardware/keymaster/VerificationToken.h>
#include <android-base/logging.h>
#include <android/hardware/identity/IIdentityCredentialStore.h>
#include <android/hardware/identity/support/IdentityCredentialSupport.h>
#include <binder/IServiceManager.h>
#include <binder/ProcessState.h>
#include <cppbor.h>
#include <cppbor_parse.h>
#include <gtest/gtest.h>
#include <future>
#include <map>
#include <utility>
#include "Util.h"
namespace android::hardware::identity {
using std::endl;
using std::make_pair;
using std::map;
using std::optional;
using std::pair;
using std::string;
using std::tie;
using std::vector;
using ::android::sp;
using ::android::String16;
using ::android::binder::Status;
using ::android::hardware::keymaster::HardwareAuthToken;
using ::android::hardware::keymaster::VerificationToken;
class TestCredentialTests : public testing::TestWithParam<string> {
public:
virtual void SetUp() override {
string halInstanceName = GetParam();
credentialStore_ = android::waitForDeclaredService<IIdentityCredentialStore>(
String16(halInstanceName.c_str()));
ASSERT_NE(credentialStore_, nullptr);
halApiVersion_ = credentialStore_->getInterfaceVersion();
}
sp<IIdentityCredentialStore> credentialStore_;
int halApiVersion_;
};
TEST_P(TestCredentialTests, testCredential) {
string docType = "org.iso.18013-5.2019.mdl";
sp<IWritableIdentityCredential> wc;
ASSERT_TRUE(credentialStore_
->createCredential(docType,
true, // testCredential
&wc)
.isOk());
vector<uint8_t> attestationApplicationId = {};
vector<uint8_t> attestationChallenge = {1};
vector<Certificate> certChain;
ASSERT_TRUE(wc->getAttestationCertificate(attestationApplicationId, attestationChallenge,
&certChain)
.isOk());
optional<vector<uint8_t>> optCredentialPubKey =
support::certificateChainGetTopMostKey(certChain[0].encodedCertificate);
ASSERT_TRUE(optCredentialPubKey);
vector<uint8_t> credentialPubKey;
credentialPubKey = optCredentialPubKey.value();
size_t proofOfProvisioningSize = 112;
// Not in v1 HAL, may fail
wc->setExpectedProofOfProvisioningSize(proofOfProvisioningSize);
ASSERT_TRUE(wc->startPersonalization(1 /* numAccessControlProfiles */,
{1} /* numDataElementsPerNamespace */)
.isOk());
// Access control profile 0: open access - don't care about the returned SACP
SecureAccessControlProfile sacp;
ASSERT_TRUE(wc->addAccessControlProfile(1, {}, false, 0, 0, &sacp).isOk());
// Single entry - don't care about the returned encrypted data
vector<uint8_t> encryptedData;
vector<uint8_t> tstrLastName = cppbor::Tstr("Turing").encode();
ASSERT_TRUE(wc->beginAddEntry({1}, "ns", "Last name", tstrLastName.size()).isOk());
ASSERT_TRUE(wc->addEntryValue(tstrLastName, &encryptedData).isOk());
vector<uint8_t> proofOfProvisioningSignature;
vector<uint8_t> credentialData;
Status status = wc->finishAddingEntries(&credentialData, &proofOfProvisioningSignature);
EXPECT_TRUE(status.isOk()) << status.exceptionCode() << ": " << status.exceptionMessage();
optional<vector<uint8_t>> proofOfProvisioning =
support::coseSignGetPayload(proofOfProvisioningSignature);
ASSERT_TRUE(proofOfProvisioning);
string cborPretty = cppbor::prettyPrint(proofOfProvisioning.value(), 32, {});
EXPECT_EQ(
"[\n"
" 'ProofOfProvisioning',\n"
" 'org.iso.18013-5.2019.mdl',\n"
" [\n"
" {\n"
" 'id' : 1,\n"
" },\n"
" ],\n"
" {\n"
" 'ns' : [\n"
" {\n"
" 'name' : 'Last name',\n"
" 'value' : 'Turing',\n"
" 'accessControlProfiles' : [1, ],\n"
" },\n"
" ],\n"
" },\n"
" true,\n"
"]",
cborPretty);
// Make sure it's signed by the CredentialKey in the returned cert chain.
EXPECT_TRUE(support::coseCheckEcDsaSignature(proofOfProvisioningSignature,
{}, // Additional data
credentialPubKey));
// Now analyze credentialData..
auto [item, _, message] = cppbor::parse(credentialData);
ASSERT_NE(item, nullptr);
const cppbor::Array* arrayItem = item->asArray();
ASSERT_NE(arrayItem, nullptr);
ASSERT_EQ(arrayItem->size(), 3);
const cppbor::Tstr* docTypeItem = (*arrayItem)[0]->asTstr();
const cppbor::Bool* testCredentialItem =
((*arrayItem)[1]->asSimple() != nullptr ? ((*arrayItem)[1]->asSimple()->asBool())
: nullptr);
EXPECT_EQ(docTypeItem->value(), docType);
EXPECT_EQ(testCredentialItem->value(), true);
vector<uint8_t> hardwareBoundKey = support::getTestHardwareBoundKey();
const cppbor::Bstr* encryptedCredentialKeysItem = (*arrayItem)[2]->asBstr();
const vector<uint8_t>& encryptedCredentialKeys = encryptedCredentialKeysItem->value();
const vector<uint8_t> docTypeVec(docType.begin(), docType.end());
optional<vector<uint8_t>> decryptedCredentialKeys =
support::decryptAes128Gcm(hardwareBoundKey, encryptedCredentialKeys, docTypeVec);
ASSERT_TRUE(decryptedCredentialKeys);
auto [dckItem, dckPos, dckMessage] = cppbor::parse(decryptedCredentialKeys.value());
ASSERT_NE(dckItem, nullptr) << dckMessage;
const cppbor::Array* dckArrayItem = dckItem->asArray();
ASSERT_NE(dckArrayItem, nullptr);
// In HAL API version 1 and 2 this array has two items, in version 3 and later it has three.
if (halApiVersion_ < 3) {
ASSERT_EQ(dckArrayItem->size(), 2);
} else {
ASSERT_EQ(dckArrayItem->size(), 3);
}
const cppbor::Bstr* storageKeyItem = (*dckArrayItem)[0]->asBstr();
const vector<uint8_t> storageKey = storageKeyItem->value();
// const cppbor::Bstr* credentialPrivKeyItem = (*dckArrayItem)[1]->asBstr();
// const vector<uint8_t> credentialPrivKey = credentialPrivKeyItem->value();
// Check storageKey can be used to decrypt |encryptedData| to |tstrLastName|
vector<uint8_t> additionalData = cppbor::Map()
.add("Namespace", "ns")
.add("Name", "Last name")
.add("AccessControlProfileIds", cppbor::Array().add(1))
.encode();
optional<vector<uint8_t>> decryptedDataItemValue =
support::decryptAes128Gcm(storageKey, encryptedData, additionalData);
ASSERT_TRUE(decryptedDataItemValue);
EXPECT_EQ(decryptedDataItemValue.value(), tstrLastName);
// Check that SHA-256(ProofOfProvisioning) matches (only in HAL API version 3)
if (halApiVersion_ >= 3) {
const cppbor::Bstr* popSha256Item = (*dckArrayItem)[2]->asBstr();
const vector<uint8_t> popSha256 = popSha256Item->value();
ASSERT_EQ(popSha256, support::sha256(proofOfProvisioning.value()));
}
}
GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(TestCredentialTests);
INSTANTIATE_TEST_SUITE_P(
Identity, TestCredentialTests,
testing::ValuesIn(android::getAidlHalInstanceNames(IIdentityCredentialStore::descriptor)),
android::PrintInstanceNameToString);
} // namespace android::hardware::identity
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