A tool for deriving PKG packet encryption keys for ps4 written in c++
| 1 | // SPDX-FileCopyrightText: 2014 Jannik Vogel <email@jannikvogel.de> |
| 2 | // SPDX-License-Identifier: CC0-1.0 |
| 3 | |
| 4 | #pragma once |
| 5 | |
| 6 | #include <cstddef> |
| 7 | #include <type_traits> |
| 8 | |
| 9 | namespace Common { |
| 10 | |
| 11 | template <typename T> |
| 12 | [[nodiscard]] constexpr T AlignUp(T value, std::size_t size) { |
| 13 | static_assert(std::is_unsigned_v<T>, "T must be an unsigned value."); |
| 14 | auto mod{static_cast<T>(value % size)}; |
| 15 | value -= mod; |
| 16 | return static_cast<T>(mod == T{0} ? value : value + size); |
| 17 | } |
| 18 | |
| 19 | template <typename T> |
| 20 | [[nodiscard]] constexpr T AlignDown(T value, std::size_t size) { |
| 21 | static_assert(std::is_unsigned_v<T>, "T must be an unsigned value."); |
| 22 | return static_cast<T>(value - value % size); |
| 23 | } |
| 24 | |
| 25 | template <typename T> |
| 26 | requires std::is_integral_v<T> |
| 27 | [[nodiscard]] constexpr bool IsAligned(T value, std::size_t alignment) { |
| 28 | return (value & (alignment - 1)) == 0; |
| 29 | } |
| 30 | |
| 31 | template <typename T> |
| 32 | requires std::is_integral_v<T> |
| 33 | [[nodiscard]] constexpr bool Is16KBAligned(T value) { |
| 34 | return (value & 0x3FFF) == 0; |
| 35 | } |
| 36 | |
| 37 | template <typename T> |
| 38 | requires std::is_integral_v<T> |
| 39 | [[nodiscard]] constexpr bool Is64KBAligned(T value) { |
| 40 | return (value & 0xFFFF) == 0; |
| 41 | } |
| 42 | |
| 43 | template <typename T> |
| 44 | requires std::is_integral_v<T> |
| 45 | [[nodiscard]] constexpr bool Is2MBAligned(T value) { |
| 46 | return (value & 0x1FFFFF) == 0; |
| 47 | } |
| 48 | |
| 49 | } // namespace Common |
| 50 |