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/*
* Copyright (C) 2018 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 "KeystoreOperation"
#include "key_proto_handler.h"
#include <android/os/DropBoxManager.h>
#include <google/protobuf/message_lite.h>
#include <keymasterV4_1/Keymaster.h>
#include <keystore/keymaster_types.h>
#include <utils/String16.h>
#include <utils/StrongPointer.h>
#include "key_config.pb.h"
namespace keystore {
void checkEnforcedCharacteristics(const hidl_vec<KeyParameter>& keyParams, KeyConfig* keyConfig) {
for (auto& keyParam : keyParams) {
switch (keyParam.tag) {
case Tag::PURPOSE:
keyConfig->add_purpose(toString(accessTagValue(TAG_PURPOSE, keyParam)));
break;
case Tag::ALGORITHM:
keyConfig->set_algorithm(toString(accessTagValue(TAG_ALGORITHM, keyParam)));
break;
case Tag::KEY_SIZE:
keyConfig->set_key_size(accessTagValue(TAG_KEY_SIZE, keyParam));
break;
case Tag::BLOCK_MODE:
keyConfig->add_block_mode(toString(accessTagValue(TAG_BLOCK_MODE, keyParam)));
break;
case Tag::PADDING:
keyConfig->add_padding(toString(accessTagValue(TAG_PADDING, keyParam)));
break;
case Tag::DIGEST:
keyConfig->add_digest(toString(accessTagValue(TAG_DIGEST, keyParam)));
break;
case Tag::EC_CURVE:
keyConfig->set_ec_curve(toString(accessTagValue(TAG_EC_CURVE, keyParam)));
break;
case Tag::AUTH_TIMEOUT:
keyConfig->set_user_auth_key_timeout(accessTagValue(TAG_AUTH_TIMEOUT, keyParam));
break;
case Tag::ORIGIN:
keyConfig->set_origin(toString(accessTagValue(TAG_ORIGIN, keyParam)));
break;
case Tag::BLOB_USAGE_REQUIREMENTS:
keyConfig->set_key_blob_usage_reqs(
toString(accessTagValue(TAG_BLOB_USAGE_REQUIREMENTS, keyParam)));
break;
case Tag::USER_AUTH_TYPE:
keyConfig->set_user_auth_type(toString(accessTagValue(TAG_USER_AUTH_TYPE, keyParam)));
break;
default:
break;
}
}
}
void uploadKeyCharacteristicsAsProto(const hidl_vec<KeyParameter>& keyParams,
bool wasCreationSuccessful) {
KeyConfig keyConfig;
checkEnforcedCharacteristics(keyParams, &keyConfig);
android::sp<android::os::DropBoxManager> dropbox(new android::os::DropBoxManager());
keyConfig.set_was_creation_successful(wasCreationSuccessful);
size_t size = keyConfig.ByteSize();
auto data = std::make_unique<uint8_t[]>(size);
keyConfig.SerializeWithCachedSizesToArray(data.get());
dropbox->addData(android::String16("keymaster"), data.get(), size, 0);
}
} // namespace keystore
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