mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-05 19:51:45 +00:00
fs.mitm: Protect the CAL0 backup from being read.
This commit is contained in:
Michael Scire
parent
e0c7bfc93d
commit
cff283f77d
4 changed files with 346 additions and 24 deletions
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@ -23,6 +23,7 @@
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#include "debug.hpp"
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#include "debug.hpp"
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#include "fsmitm_utils.hpp"
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#include "fsmitm_utils.hpp"
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#include "ini.h"
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#include "ini.h"
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#include "sha256.h"
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static FsFileSystem g_sd_filesystem = {0};
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static FsFileSystem g_sd_filesystem = {0};
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static std::vector<u64> g_mitm_flagged_tids;
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static std::vector<u64> g_mitm_flagged_tids;
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@ -37,6 +38,11 @@ static bool g_override_by_default = true;
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/* Static buffer for loader.ini contents at runtime. */
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/* Static buffer for loader.ini contents at runtime. */
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static char g_config_ini_data[0x800];
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static char g_config_ini_data[0x800];
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/* Backup file for CAL0 partition. */
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static constexpr size_t ProdinfoSize = 0x8000;
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static FsFile g_cal0_file;
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static u8 g_cal0_backup[ProdinfoSize];
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static bool IsHexadecimal(const char *str) {
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static bool IsHexadecimal(const char *str) {
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while (*str) {
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while (*str) {
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if (isxdigit(*str)) {
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if (isxdigit(*str)) {
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@ -69,8 +75,7 @@ void Utils::InitializeSdThreadFunc(void *args) {
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fsFsCreateDirectory(&g_sd_filesystem, "/atmosphere/automatic_backups");
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fsFsCreateDirectory(&g_sd_filesystem, "/atmosphere/automatic_backups");
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{
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{
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FsStorage cal0_storage;
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FsStorage cal0_storage;
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FsFile cal0_file;
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bool has_auto_backup = false;
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char serial_number[0x40] = {0};
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char serial_number[0x40] = {0};
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if (R_SUCCEEDED(setsysInitialize())) {
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if (R_SUCCEEDED(setsysInitialize())) {
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@ -84,32 +89,37 @@ void Utils::InitializeSdThreadFunc(void *args) {
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} else {
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} else {
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snprintf(prodinfo_backup_path, sizeof(prodinfo_backup_path) - 1, "/atmosphere/automatic_backups/PRODINFO.bin");
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snprintf(prodinfo_backup_path, sizeof(prodinfo_backup_path) - 1, "/atmosphere/automatic_backups/PRODINFO.bin");
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}
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}
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constexpr size_t PRODINFO_SIZE = 0x4000;
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if (R_SUCCEEDED(fsFsOpenFile(&g_sd_filesystem, prodinfo_backup_path, FS_OPEN_READ | FS_OPEN_WRITE, &g_cal0_file))) {
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bool has_auto_backup = false;
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if (R_SUCCEEDED(fsFsOpenFile(&g_sd_filesystem, prodinfo_backup_path, FS_OPEN_READ, &cal0_file))) {
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size_t read = 0;
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char magic[4];
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if (R_SUCCEEDED(fsFileRead(&g_cal0_file, 0, g_cal0_backup, sizeof(g_cal0_backup), &read)) && read == sizeof(g_cal0_backup)) {
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size_t read;
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bool is_cal0_valid = true;
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if (R_SUCCEEDED(fsFileRead(&cal0_file, 0, magic, sizeof(magic), &read)) && read == sizeof(magic) && memcmp(magic, "CAL0", sizeof(magic)) == 0) {
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is_cal0_valid &= memcmp(g_cal0_backup, "CAL0", 4) == 0;
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has_auto_backup = true;
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is_cal0_valid &= memcmp(g_cal0_backup + 0x250, serial_number, 0x18) == 0;
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u32 cal0_size = ((u32 *)g_cal0_backup)[2];
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is_cal0_valid &= cal0_size + 0x40 <= ProdinfoSize;
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if (is_cal0_valid) {
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struct sha256_state sha_ctx;
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u8 calc_hash[0x20];
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sha256_init(&sha_ctx);
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sha256_update(&sha_ctx, g_cal0_backup + 0x40, cal0_size);
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sha256_finalize(&sha_ctx);
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sha256_finish(&sha_ctx, calc_hash);
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is_cal0_valid &= memcmp(calc_hash, g_cal0_backup + 0x20, sizeof(calc_hash)) == 0;
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}
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has_auto_backup = is_cal0_valid;
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}
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}
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fsFileClose(&cal0_file);
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}
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if (!has_auto_backup && R_SUCCEEDED(fsOpenBisStorage(&cal0_storage, BisStorageId_Prodinfo))) {
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if (R_SUCCEEDED(fsStorageRead(&cal0_storage, 0, g_cal0_backup, ProdinfoSize)) ) {
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if (!has_auto_backup && R_SUCCEEDED(fsOpenBisStorage(&cal0_storage, BisStorageId_Prodinfo))) {
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fsFileSetSize(&g_cal0_file, ProdinfoSize);
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u8 *cal0 = new u8[PRODINFO_SIZE];
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fsFileWrite(&g_cal0_file, 0, g_cal0_backup, ProdinfoSize);
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if (R_SUCCEEDED(fsStorageRead(&cal0_storage, 0, cal0, PRODINFO_SIZE)) ) {
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fsFileFlush(&g_cal0_file);
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fsFsCreateFile(&g_sd_filesystem, prodinfo_backup_path, PRODINFO_SIZE, 0);
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if (R_SUCCEEDED(fsFsOpenFile(&g_sd_filesystem, prodinfo_backup_path, FS_OPEN_READ | FS_OPEN_WRITE, &cal0_file))) {
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fsFileSetSize(&cal0_file, PRODINFO_SIZE);
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fsFileWrite(&cal0_file, 0, cal0, PRODINFO_SIZE);
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fsFileFlush(&cal0_file);
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fsFileClose(&cal0_file);
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}
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}
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}
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}
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delete cal0;
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/* NOTE: g_cal0_file is intentionally not closed here. This prevents any other process from opening it. */
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fsStorageClose(&cal0_storage);
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}
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}
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}
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}
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113
stratosphere/fs_mitm/source/sha256.c
Normal file
113
stratosphere/fs_mitm/source/sha256.c
Normal file
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@ -0,0 +1,113 @@
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/* Based on linux source code */
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/*
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* sha256_base.h - core logic for SHA-256 implementations
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*
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* Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <string.h>
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#include "sha256.h"
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#define unlikely(x) __builtin_expect(!!(x), 0)
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void sha256_block_data_order (uint32_t *ctx, const void *in, size_t num);
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int sha256_init(struct sha256_state *sctx)
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{
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sctx->state[0] = SHA256_H0;
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sctx->state[1] = SHA256_H1;
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sctx->state[2] = SHA256_H2;
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sctx->state[3] = SHA256_H3;
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sctx->state[4] = SHA256_H4;
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sctx->state[5] = SHA256_H5;
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sctx->state[6] = SHA256_H6;
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sctx->state[7] = SHA256_H7;
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sctx->count = 0;
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return 0;
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}
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int sha256_update(struct sha256_state *sctx,
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const void *data,
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size_t len)
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{
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const u8 *data8 = (const u8 *)data;
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unsigned int len32 = (unsigned int)len;
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unsigned int partial = sctx->count % SHA256_BLOCK_SIZE;
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sctx->count += len32;
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if (unlikely((partial + len32) >= SHA256_BLOCK_SIZE)) {
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int blocks;
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if (partial) {
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int p = SHA256_BLOCK_SIZE - partial;
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memcpy(sctx->buf + partial, data8, p);
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data8 += p;
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len32 -= p;
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sha256_block_data_order(sctx->state, sctx->buf, 1);
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}
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blocks = len32 / SHA256_BLOCK_SIZE;
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len32 %= SHA256_BLOCK_SIZE;
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if (blocks) {
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sha256_block_data_order(sctx->state, data8, blocks);
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data8 += blocks * SHA256_BLOCK_SIZE;
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}
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partial = 0;
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}
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if (len32)
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memcpy(sctx->buf + partial, data8, len32);
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return 0;
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}
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int sha256_finalize(struct sha256_state *sctx)
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{
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const int bit_offset = SHA256_BLOCK_SIZE - sizeof(u64);
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u64 *bits = (u64 *)(sctx->buf + bit_offset);
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unsigned int partial = sctx->count % SHA256_BLOCK_SIZE;
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sctx->buf[partial++] = 0x80;
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if (partial > bit_offset) {
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memset(sctx->buf + partial, 0x0, SHA256_BLOCK_SIZE - partial);
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partial = 0;
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sha256_block_data_order(sctx->state, sctx->buf, 1);
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}
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memset(sctx->buf + partial, 0x0, bit_offset - partial);
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*bits = __builtin_bswap64(sctx->count << 3);
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sha256_block_data_order(sctx->state, sctx->buf, 1);
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return 0;
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}
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int sha256_finish(struct sha256_state *sctx, void *out)
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{
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unsigned int digest_size = 32;
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u32 *digest = (u32 *)out;
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int i;
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// Switch: misalignment shouldn't be a problem here...
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for (i = 0; digest_size > 0; i++, digest_size -= sizeof(u32))
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*digest++ = __builtin_bswap32(sctx->state[i]);
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*sctx = (struct sha256_state){};
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return 0;
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}
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#ifdef __cplusplus
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}
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#endif
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36
stratosphere/fs_mitm/source/sha256.h
Normal file
36
stratosphere/fs_mitm/source/sha256.h
Normal file
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@ -0,0 +1,36 @@
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#pragma once
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/* Based on linux source code */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <switch/types.h>
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#define SHA256_DIGEST_SIZE 32
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#define SHA256_BLOCK_SIZE 64
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#define SHA256_H0 0x6a09e667UL
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#define SHA256_H1 0xbb67ae85UL
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#define SHA256_H2 0x3c6ef372UL
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#define SHA256_H3 0xa54ff53aUL
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#define SHA256_H4 0x510e527fUL
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#define SHA256_H5 0x9b05688cUL
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#define SHA256_H6 0x1f83d9abUL
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#define SHA256_H7 0x5be0cd19UL
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struct sha256_state {
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u32 state[SHA256_DIGEST_SIZE / 4];
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u64 count;
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u8 buf[SHA256_BLOCK_SIZE];
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};
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int sha256_init(struct sha256_state *sctx);
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int sha256_update(struct sha256_state *sctx, const void *data, size_t len);
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int sha256_finalize(struct sha256_state *sctx);
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int sha256_finish(struct sha256_state *sctx, void *out);
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#ifdef __cplusplus
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}
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#endif
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163
stratosphere/fs_mitm/source/sha256_armv8.s
Normal file
163
stratosphere/fs_mitm/source/sha256_armv8.s
Normal file
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@ -0,0 +1,163 @@
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.section .text.sha256_armv8, "ax", %progbits
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.align 5
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.arch armv8-a+crypto
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# SHA256 assembly implementation for ARMv8 AArch64 (based on linux source code)
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.global sha256_block_data_order
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.type sha256_block_data_order,%function
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sha256_block_data_order:
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.Lsha256prolog:
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stp x29, x30, [sp,#-64]!
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mov x29, sp
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adr x3, .LKConstant256
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str q8, [sp, #16]
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ld1 {v16.4s-v19.4s}, [x3], #64
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ld1 {v0.4s}, [x0], #16
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ld1 {v20.4s-v23.4s}, [x3], #64
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add x2, x1, x2, lsl #6
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ld1 {v1.4s}, [x0]
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ld1 {v24.4s-v27.4s}, [x3], #64
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sub x0, x0, #16
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str q9, [sp, #32]
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str q10, [sp, #48]
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ld1 {v28.4s-v31.4s}, [x3], #64
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.Lsha256loop:
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ld1 {v5.16b-v8.16b}, [x1], #64
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mov v2.16b, v0.16b
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mov v3.16b, v1.16b
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rev32 v5.16b, v5.16b
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rev32 v6.16b, v6.16b
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add v9.4s, v5.4s, v16.4s
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rev32 v7.16b, v7.16b
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add v10.4s, v6.4s, v17.4s
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mov v4.16b, v2.16b
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sha256h q2, q3, v9.4s
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sha256h2 q3, q4, v9.4s
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sha256su0 v5.4s, v6.4s
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rev32 v8.16b, v8.16b
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add v9.4s, v7.4s, v18.4s
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mov v4.16b, v2.16b
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sha256h q2, q3, v10.4s
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sha256h2 q3, q4, v10.4s
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sha256su0 v6.4s, v7.4s
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sha256su1 v5.4s, v7.4s, v8.4s
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add v10.4s, v8.4s, v19.4s
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mov v4.16b, v2.16b
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sha256h q2, q3, v9.4s
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sha256h2 q3, q4, v9.4s
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sha256su0 v7.4s, v8.4s
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sha256su1 v6.4s, v8.4s, v5.4s
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add v9.4s, v5.4s, v20.4s
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mov v4.16b, v2.16b
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sha256h q2, q3, v10.4s
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sha256h2 q3, q4, v10.4s
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sha256su0 v8.4s, v5.4s
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sha256su1 v7.4s, v5.4s, v6.4s
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add v10.4s, v6.4s, v21.4s
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mov v4.16b, v2.16b
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sha256h q2, q3, v9.4s
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sha256h2 q3, q4, v9.4s
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sha256su0 v5.4s, v6.4s
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sha256su1 v8.4s, v6.4s, v7.4s
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add v9.4s, v7.4s, v22.4s
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mov v4.16b, v2.16b
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sha256h q2, q3, v10.4s
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sha256h2 q3, q4, v10.4s
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sha256su0 v6.4s, v7.4s
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sha256su1 v5.4s, v7.4s, v8.4s
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add v10.4s, v8.4s, v23.4s
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mov v4.16b, v2.16b
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sha256h q2, q3, v9.4s
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sha256h2 q3, q4, v9.4s
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sha256su0 v7.4s, v8.4s
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sha256su1 v6.4s, v8.4s, v5.4s
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add v9.4s, v5.4s, v24.4s
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mov v4.16b, v2.16b
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sha256h q2, q3, v10.4s
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sha256h2 q3, q4, v10.4s
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sha256su0 v8.4s, v5.4s
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sha256su1 v7.4s, v5.4s, v6.4s
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add v10.4s, v6.4s, v25.4s
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mov v4.16b, v2.16b
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||||||
|
sha256h q2, q3, v9.4s
|
||||||
|
sha256h2 q3, q4, v9.4s
|
||||||
|
sha256su0 v5.4s, v6.4s
|
||||||
|
sha256su1 v8.4s, v6.4s, v7.4s
|
||||||
|
add v9.4s, v7.4s, v26.4s
|
||||||
|
mov v4.16b, v2.16b
|
||||||
|
sha256h q2, q3, v10.4s
|
||||||
|
sha256h2 q3, q4, v10.4s
|
||||||
|
sha256su0 v6.4s, v7.4s
|
||||||
|
sha256su1 v5.4s, v7.4s, v8.4s
|
||||||
|
add v10.4s, v8.4s, v27.4s
|
||||||
|
mov v4.16b, v2.16b
|
||||||
|
sha256h q2, q3, v9.4s
|
||||||
|
sha256h2 q3, q4, v9.4s
|
||||||
|
sha256su0 v7.4s, v8.4s
|
||||||
|
sha256su1 v6.4s, v8.4s, v5.4s
|
||||||
|
add v9.4s, v5.4s, v28.4s
|
||||||
|
mov v4.16b, v2.16b
|
||||||
|
sha256h q2, q3, v10.4s
|
||||||
|
sha256h2 q3, q4, v10.4s
|
||||||
|
sha256su0 v8.4s, v5.4s
|
||||||
|
sha256su1 v7.4s, v5.4s, v6.4s
|
||||||
|
add v10.4s, v6.4s, v29.4s
|
||||||
|
mov v4.16b, v2.16b
|
||||||
|
sha256h q2, q3, v9.4s
|
||||||
|
sha256h2 q3, q4, v9.4s
|
||||||
|
sha256su1 v8.4s, v6.4s, v7.4s
|
||||||
|
add v9.4s, v7.4s, v30.4s
|
||||||
|
mov v4.16b, v2.16b
|
||||||
|
sha256h q2, q3, v10.4s
|
||||||
|
sha256h2 q3, q4, v10.4s
|
||||||
|
add v10.4s, v8.4s, v31.4s
|
||||||
|
mov v4.16b, v2.16b
|
||||||
|
sha256h q2, q3, v9.4s
|
||||||
|
sha256h2 q3, q4, v9.4s
|
||||||
|
mov v4.16b, v2.16b
|
||||||
|
sha256h q2, q3, v10.4s
|
||||||
|
sha256h2 q3, q4, v10.4s
|
||||||
|
cmp x1, x2
|
||||||
|
add v1.4s, v1.4s, v3.4s
|
||||||
|
add v0.4s, v0.4s, v2.4s
|
||||||
|
b.ne .Lsha256loop
|
||||||
|
|
||||||
|
.Lsha256epilog:
|
||||||
|
|
||||||
|
st1 {v0.4s,v1.4s}, [x0]
|
||||||
|
ldr q10, [sp, #48]
|
||||||
|
ldr q9, [sp, #32]
|
||||||
|
ldr q8, [sp, #16]
|
||||||
|
ldr x29, [sp], #64
|
||||||
|
ret
|
||||||
|
|
||||||
|
.align 5
|
||||||
|
.LKConstant256:
|
||||||
|
.word 0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
|
||||||
|
.word 0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
|
||||||
|
.word 0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
|
||||||
|
.word 0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
|
||||||
|
.word 0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
|
||||||
|
.word 0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
|
||||||
|
.word 0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
|
||||||
|
.word 0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
|
||||||
|
.word 0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
|
||||||
|
.word 0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
|
||||||
|
.word 0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
|
||||||
|
.word 0xd192e819,0xd6990624,0xf40e3585,0x106aa070
|
||||||
|
.word 0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
|
||||||
|
.word 0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
|
||||||
|
.word 0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
|
||||||
|
.word 0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
|
||||||
|
|
||||||
|
.size sha256_block_data_order,.-sha256_block_data_order
|
||||||
|
.align 2
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
Loading…
Reference in a new issue