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91 lines
2.5 KiB
91 lines
2.5 KiB
/* |
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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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