| /* |
| * Copyright (C) 2017 Metrological Group B.V. |
| * Copyright (C) 2017 Igalia S.L. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #include <gcrypt.h> |
| |
| namespace PAL { |
| namespace GCrypt { |
| |
| template<typename T> |
| struct HandleDeleter { |
| public: |
| void operator()(T handle) = delete; |
| }; |
| |
| template<typename T> |
| class Handle { |
| public: |
| Handle() = default; |
| |
| explicit Handle(T handle) |
| : m_handle(handle) |
| { } |
| |
| ~Handle() |
| { |
| clear(); |
| } |
| |
| Handle(const Handle&) = delete; |
| Handle& operator=(const Handle&) = delete; |
| |
| Handle(Handle&&) = delete; |
| Handle& operator=(Handle&&) = delete; |
| |
| void clear() |
| { |
| if (m_handle) |
| HandleDeleter<T>()(m_handle); |
| m_handle = nullptr; |
| } |
| |
| T release() |
| { |
| T handle = m_handle; |
| m_handle = nullptr; |
| return handle; |
| } |
| |
| T* operator&() { return &m_handle; } |
| |
| T handle() const { return m_handle; } |
| operator T() const { return m_handle; } |
| |
| bool operator!() const { return !m_handle; } |
| |
| private: |
| T m_handle { nullptr }; |
| }; |
| |
| template<> |
| struct HandleDeleter<gcry_cipher_hd_t> { |
| void operator()(gcry_cipher_hd_t handle) |
| { |
| gcry_cipher_close(handle); |
| } |
| }; |
| |
| template<> |
| struct HandleDeleter<gcry_ctx_t> { |
| void operator()(gcry_ctx_t handle) |
| { |
| gcry_ctx_release(handle); |
| } |
| }; |
| |
| template<> |
| struct HandleDeleter<gcry_mac_hd_t> { |
| void operator()(gcry_mac_hd_t handle) |
| { |
| gcry_mac_close(handle); |
| } |
| }; |
| |
| template<> |
| struct HandleDeleter<gcry_mpi_t> { |
| void operator()(gcry_mpi_t handle) |
| { |
| gcry_mpi_release(handle); |
| } |
| }; |
| |
| template<> |
| struct HandleDeleter<gcry_mpi_point_t> { |
| void operator()(gcry_mpi_point_t handle) |
| { |
| gcry_mpi_point_release(handle); |
| } |
| }; |
| |
| template<> |
| struct HandleDeleter<gcry_sexp_t> { |
| void operator()(gcry_sexp_t handle) |
| { |
| gcry_sexp_release(handle); |
| } |
| }; |
| |
| } // namespace GCrypt |
| } // namespace PAL |