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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 "operation_proto_handler.h"
#include <android/os/DropBoxManager.h>
#include <google/protobuf/message_lite.h>
#include <keymasterV4_0/Keymaster.h>
#include <keystore/keymaster_types.h>
#include <keystore/keystore_hidl_support.h>
#include <utils/String16.h>
#include "operation_config.pb.h"
namespace keystore {
void determinePurpose(KeyPurpose purpose, OperationConfig* operationConfig) {
switch (purpose) {
case KeyPurpose::VERIFY:
operationConfig->set_purpose("verify");
break;
case KeyPurpose::ENCRYPT:
operationConfig->set_purpose("encrypt");
break;
case KeyPurpose::SIGN:
operationConfig->set_purpose("sign");
break;
case KeyPurpose::DECRYPT:
operationConfig->set_purpose("decrypt");
break;
case KeyPurpose::WRAP_KEY:
operationConfig->set_purpose("wrap");
break;
default:
break;
}
}
void checkKeyCharacteristics(const hidl_vec<KeyParameter>& characteristics,
OperationConfig* operationConfig) {
for (auto& opParam : characteristics) {
switch (opParam.tag) {
case Tag::ALGORITHM:
operationConfig->set_algorithm(toString(accessTagValue(TAG_ALGORITHM, opParam)));
break;
case Tag::KEY_SIZE:
operationConfig->set_key_size(accessTagValue(TAG_KEY_SIZE, opParam));
break;
case Tag::EC_CURVE:
operationConfig->set_ec_curve(toString(accessTagValue(TAG_EC_CURVE, opParam)));
break;
case Tag::AUTH_TIMEOUT:
operationConfig->set_user_auth_key_timeout(accessTagValue(TAG_AUTH_TIMEOUT, opParam));
break;
case Tag::ORIGIN:
operationConfig->set_origin(toString(accessTagValue(TAG_ORIGIN, opParam)));
break;
case Tag::BLOB_USAGE_REQUIREMENTS:
operationConfig->set_key_blob_usage_reqs(
toString(accessTagValue(TAG_BLOB_USAGE_REQUIREMENTS, opParam)));
break;
case Tag::USER_AUTH_TYPE:
operationConfig->set_user_auth_type(
toString(accessTagValue(TAG_USER_AUTH_TYPE, opParam)));
break;
default:
break;
}
}
}
void checkOpCharacteristics(const hidl_vec<KeyParameter>& characteristics,
OperationConfig* operationConfig) {
for (auto& opParam : characteristics) {
switch (opParam.tag) {
case Tag::BLOCK_MODE:
operationConfig->set_block_mode(toString(accessTagValue(TAG_BLOCK_MODE, opParam)));
break;
case Tag::PADDING:
operationConfig->set_padding(toString(accessTagValue(TAG_PADDING, opParam)));
break;
case Tag::DIGEST:
operationConfig->set_digest(toString(accessTagValue(TAG_DIGEST, opParam)));
break;
default:
break;
}
}
}
void uploadOpAsProto(Operation& op, bool wasOpSuccessful) {
OperationConfig operationConfig;
determinePurpose(op.purpose, &operationConfig);
checkKeyCharacteristics(op.characteristics.softwareEnforced, &operationConfig);
checkKeyCharacteristics(op.characteristics.hardwareEnforced, &operationConfig);
checkOpCharacteristics(op.params, &operationConfig);
auto dropbox = std::make_unique<android::os::DropBoxManager>();
operationConfig.set_was_op_successful(wasOpSuccessful);
size_t size = operationConfig.ByteSize();
auto data = std::make_unique<uint8_t[]>(size);
operationConfig.SerializeWithCachedSizesToArray(data.get());
dropbox->addData(android::String16("keymaster"), data.get(), size, 0);
}
} // namespace keystore
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