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https://github.com/Atmosphere-NX/Atmosphere.git
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loader: use libstratosphere randomness
This commit is contained in:
parent
87f7a6ebdc
commit
5c9d0f05b1
6 changed files with 4 additions and 97 deletions
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@ -1 +1 @@
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Subproject commit 163d9259a365c3a89c1a837b28e7609d45795e40
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Subproject commit 880bce9092fbef0bcbf101b8ec2e3d2c5af3fb98
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@ -18,7 +18,6 @@
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#include <cstdio>
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#include "ldr_map.hpp"
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#include "ldr_random.hpp"
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Result MapUtils::LocateSpaceForMap(u64 *out, u64 out_size) {
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if (kernelAbove200()) {
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@ -142,7 +141,7 @@ Result MapUtils::MapCodeMemoryForProcessModern(Handle process_h, u64 base_addres
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u64 try_address;
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for (unsigned int i = 0; i < 0x200; i++) {
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while (true) {
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try_address = address_space.addspace_base + (RandomUtils::GetRandomU64((u64)(address_space.addspace_size - size) >> 12) << 12);
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try_address = address_space.addspace_base + (StratosphereRandomUtils::GetRandomU64((u64)(address_space.addspace_size - size) >> 12) << 12);
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if (address_space.heap_size && (address_space.heap_base <= try_address + size - 1 && try_address <= address_space.heap_end - 1)) {
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continue;
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}
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@ -179,7 +178,7 @@ Result MapUtils::MapCodeMemoryForProcessDeprecated(Handle process_h, bool is_64_
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u64 try_address;
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for (unsigned int i = 0; i < 0x200; i++) {
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try_address = addspace_base + (RandomUtils::GetRandomU64((u64)(addspace_size - size) >> 12) << 12);
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try_address = addspace_base + (StratosphereRandomUtils::GetRandomU64((u64)(addspace_size - size) >> 12) << 12);
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rc = svcMapProcessCodeMemory(process_h, try_address, base_address, size);
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if (rc != ResultKernelInvalidMemoryState) {
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break;
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@ -23,7 +23,6 @@
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#include "ldr_nro.hpp"
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#include "ldr_registration.hpp"
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#include "ldr_map.hpp"
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#include "ldr_random.hpp"
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Result NroUtils::ValidateNrrHeader(NrrHeader *header, u64 size, u64 title_id_min) {
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if (header->magic != MAGIC_NRR0) {
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@ -21,7 +21,6 @@
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#include "lz4.h"
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#include "ldr_nso.hpp"
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#include "ldr_map.hpp"
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#include "ldr_random.hpp"
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#include "ldr_patcher.hpp"
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#include "ldr_content_management.hpp"
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@ -226,7 +225,7 @@ Result NsoUtils::CalculateNsoLoadExtents(u32 addspace_type, u32 args_size, NsoLo
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u64 aslr_slide = 0;
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if (addspace_type & 0x20) {
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aslr_slide = RandomUtils::GetRandomU64((addspace_size - extents->total_size) >> 21) << 21;
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aslr_slide = StratosphereRandomUtils::GetRandomU64((addspace_size - extents->total_size) >> 21) << 21;
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}
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extents->base_address = addspace_start + aslr_slide;
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@ -1,65 +0,0 @@
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/*
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* Copyright (c) 2018-2019 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <switch.h>
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#include "ldr_random.hpp"
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/* Official HOS uses TinyMT. This is high effort. Let's just use XorShift. */
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/* https://en.wikipedia.org/wiki/Xorshift */
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static u32 g_random_state[4] = {0};
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static bool g_has_initialized = false;
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static void EnsureRandomState() {
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if (g_has_initialized) {
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return;
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}
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/* Retrieve process entropy with svcGetInfo. */
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u64 val = 0;
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for (unsigned int i = 0; i < 4; i++) {
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if (R_FAILED(svcGetInfo(&val, 0xB, 0, i))) {
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/* TODO: Panic? */
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}
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g_random_state[i] = val & 0xFFFFFFFF;
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}
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g_has_initialized = true;
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}
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u32 RandomUtils::GetNext() {
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EnsureRandomState();
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u32 s, t = g_random_state[3];
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t ^= t << 11;
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t ^= t >> 8;
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g_random_state[3] = g_random_state[2]; g_random_state[2] = g_random_state[1]; g_random_state[1] = (s = g_random_state[0]);
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t ^= s;
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t ^= s >> 19;
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g_random_state[0] = t;
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return t;
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}
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/* These are slightly biased, but I think that's totally okay. */
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u32 RandomUtils::GetRandomU32(u32 max) {
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return GetNext() % max;
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}
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u64 RandomUtils::GetRandomU64(u64 max) {
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u64 val = GetNext();
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val |= ((u64)GetNext()) << 32;
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return val % max;
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}
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@ -1,25 +0,0 @@
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/*
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* Copyright (c) 2018-2019 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <switch.h>
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class RandomUtils {
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public:
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static u32 GetNext();
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static u32 GetRandomU32(u32 max);
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static u64 GetRandomU64(u64 max);
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};
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