91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
/*
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* Copyright (C) 2015 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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#include "operation_table.h"
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#include <keymaster/new>
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#include <openssl/rand.h>
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#include "openssl_err.h"
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#include "operation.h"
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namespace keymaster {
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OperationTable::Entry::~Entry() {
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delete operation;
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operation = NULL;
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handle = 0;
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}
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keymaster_error_t OperationTable::Add(Operation* operation, const KeymasterContext& context,
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keymaster_operation_handle_t* op_handle) {
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if (!table_.get()) {
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table_.reset(new (std::nothrow) Entry[table_size_]);
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if (!table_.get())
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return KM_ERROR_MEMORY_ALLOCATION_FAILED;
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}
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UniquePtr<Operation> op(operation);
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keymaster_error_t error = operation->CreateOperationHandle(context, op_handle);
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if (error != KM_ERROR_OK)
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return error;
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if (*op_handle == 0) {
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// Statistically this is vanishingly unlikely, which means if it ever happens in practice,
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// it indicates a broken RNG.
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return KM_ERROR_UNKNOWN_ERROR;
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}
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for (size_t i = 0; i < table_size_; ++i) {
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if (table_[i].operation == NULL) {
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table_[i].operation = op.release();
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table_[i].handle = *op_handle;
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return KM_ERROR_OK;
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}
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}
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return KM_ERROR_TOO_MANY_OPERATIONS;
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}
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Operation* OperationTable::Find(keymaster_operation_handle_t op_handle) {
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if (op_handle == 0)
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return NULL;
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if (!table_.get())
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return NULL;
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for (size_t i = 0; i < table_size_; ++i) {
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if (table_[i].handle == op_handle)
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return table_[i].operation;
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}
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return NULL;
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}
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bool OperationTable::Delete(keymaster_operation_handle_t op_handle) {
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if (!table_.get())
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return false;
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for (size_t i = 0; i < table_size_; ++i) {
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if (table_[i].handle == op_handle) {
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delete table_[i].operation;
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table_[i].operation = NULL;
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table_[i].handle = 0;
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return true;
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}
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}
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return false;
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}
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} // namespace keymaster
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