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/*
* Copyright (C) 2015 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.h"
#include <algorithm>
namespace android {
OperationMap::OperationMap(IBinder::DeathRecipient* deathRecipient)
: mDeathRecipient(deathRecipient) {
}
sp<IBinder> OperationMap::addOperation(keymaster_operation_handle_t handle,
uint64_t keyid, keymaster_purpose_t purpose,
const keymaster1_device_t* dev,
sp<IBinder> appToken,
keymaster_key_characteristics_t* characteristics,
bool pruneable) {
sp<IBinder> token = new BBinder();
mMap[token] = std::move(Operation(handle, keyid, purpose, dev, characteristics, appToken));
if (pruneable) {
mLru.push_back(token);
}
if (mAppTokenMap.find(appToken) == mAppTokenMap.end()) {
appToken->linkToDeath(mDeathRecipient);
}
mAppTokenMap[appToken].push_back(token);
return token;
}
bool OperationMap::getOperation(sp<IBinder> token, keymaster_operation_handle_t* outHandle,
uint64_t* outKeyid, keymaster_purpose_t* outPurpose,
const keymaster1_device_t** outDevice,
const keymaster_key_characteristics_t** outCharacteristics) {
if (!outHandle || !outDevice) {
return false;
}
auto entry = mMap.find(token);
if (entry == mMap.end()) {
return false;
}
updateLru(token);
*outHandle = entry->second.handle;
*outKeyid = entry->second.keyid;
*outPurpose = entry->second.purpose;
*outDevice = entry->second.device;
if (outCharacteristics) {
*outCharacteristics = entry->second.characteristics.get();
}
return true;
}
void OperationMap::updateLru(sp<IBinder> token) {
auto lruEntry = std::find(mLru.begin(), mLru.end(), token);
if (lruEntry != mLru.end()) {
mLru.erase(lruEntry);
mLru.push_back(token);
}
}
bool OperationMap::removeOperation(sp<IBinder> token) {
auto entry = mMap.find(token);
if (entry == mMap.end()) {
return false;
}
sp<IBinder> appToken = entry->second.appToken;
mMap.erase(entry);
auto lruEntry = std::find(mLru.begin(), mLru.end(), token);
if (lruEntry != mLru.end()) {
mLru.erase(lruEntry);
}
removeOperationTracking(token, appToken);
return true;
}
void OperationMap::removeOperationTracking(sp<IBinder> token, sp<IBinder> appToken) {
auto appEntry = mAppTokenMap.find(appToken);
if (appEntry == mAppTokenMap.end()) {
ALOGE("Entry for %p contains unmapped application token %p", token.get(), appToken.get());
return;
}
auto tokenEntry = std::find(appEntry->second.begin(), appEntry->second.end(), token);
appEntry->second.erase(tokenEntry);
// Stop listening for death if all operations tied to the token have finished.
if (appEntry->second.size() == 0) {
appToken->unlinkToDeath(mDeathRecipient);
mAppTokenMap.erase(appEntry);
}
}
bool OperationMap::hasPruneableOperation() {
return mLru.size() != 0;
}
sp<IBinder> OperationMap::getOldestPruneableOperation() {
if (!hasPruneableOperation()) {
return sp<IBinder>(NULL);
}
return mLru[0];
}
bool OperationMap::getOperationAuthToken(sp<IBinder> token, const hw_auth_token_t** outToken) {
auto entry = mMap.find(token);
if (entry == mMap.end()) {
return false;
}
*outToken = entry->second.authToken.get();
return true;
}
bool OperationMap::setOperationAuthToken(sp<IBinder> token, const hw_auth_token_t* authToken) {
auto entry = mMap.find(token);
if (entry == mMap.end()) {
return false;
}
entry->second.authToken.reset(new hw_auth_token_t);
*entry->second.authToken = *authToken;
return true;
}
std::vector<sp<IBinder>> OperationMap::getOperationsForToken(sp<IBinder> appToken) {
auto appEntry = mAppTokenMap.find(appToken);
if (appEntry != mAppTokenMap.end()) {
return appEntry->second;
} else {
return std::vector<sp<IBinder>>();
}
}
OperationMap::Operation::Operation(keymaster_operation_handle_t handle_,
uint64_t keyid_,
keymaster_purpose_t purpose_,
const keymaster1_device_t* device_,
keymaster_key_characteristics_t* characteristics_,
sp<IBinder> appToken_)
: handle(handle_),
keyid(keyid_),
purpose(purpose_),
device(device_),
characteristics(characteristics_),
appToken(appToken_) {
}
OperationMap::Operation::Operation() : handle(0), device(NULL), characteristics(), appToken(NULL) {
}
} // namespace android
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