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Lockpick/source/Common.cpp

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/*
* Copyright (c) 2018 shchmue
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
Shared font code adapted from
https://github.com/switchbrew/switch-examples/tree/master/graphics/shared_font
*/
#include "Common.hpp"
#include <algorithm>
#include <filesystem>
#include <fstream>
extern "C" {
#include <machine/endian.h>
}
#include "sha256.h"
namespace Common {
static u32 framebuf_width = 0;
static u32 *framebuf;
// FreeType vars
static FT_Library library;
static FT_Face face;
void draw_glyph(FT_Bitmap *bitmap, u32 x, u32 y, u32 color) {
u32 framex, framey;
u8* imageptr = bitmap->buffer;
for (u32 tmpy = 0; tmpy < bitmap->rows; tmpy++) {
for (u32 tmpx = 0; tmpx < bitmap->width; tmpx++) {
framex = x + tmpx;
framey = y + tmpy;
// color calculation is extremely simplistic and only supports 0 or 0xff in each element for proper antialiasing
framebuf[framey * framebuf_width + framex] = RGBA8_MAXALPHA(imageptr[tmpx], imageptr[tmpx], imageptr[tmpx]) & color;
}
imageptr += bitmap->pitch;
}
}
void draw_line(u32 x, u32 y, u32 length, u32 color) {
for (u32 tmpx = x; tmpx < x + length; tmpx++)
framebuf[y * framebuf_width + tmpx] = color;
}
void draw_set_rect(u32 x, u32 y, u32 width, u32 height, u32 color) {
for (u32 tmpy = y; tmpy < y + height; tmpy++)
draw_line(x, tmpy, width, color);
}
void draw_text(u32 x, u32 y, u32 color, const char *str) {
u32 tmpx = x;
FT_UInt glyph_index;
FT_GlyphSlot slot = face->glyph;
for (size_t i = 0; i < strlen(str); i++) {
if (str[i] == '\n') {
tmpx = x;
y += face->size->metrics.height / 64;
continue;
}
glyph_index = FT_Get_Char_Index(face, (FT_ULong)str[i]);
if (R_FAILED(FT_Load_Glyph(face, glyph_index, FT_LOAD_COLOR) ||
FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL) != 0))
{
return;
}
draw_glyph(&slot->bitmap, tmpx + slot->bitmap_left, y - slot->bitmap_top, color);
tmpx += slot->advance.x >> 6;
y += slot->advance.y >> 6;
}
}
void draw_text_with_time(u32 x, u32 y, u32 color, const char *str, const float time) {
char time_str[32];
sprintf(time_str, "%1.6f seconds", time);
draw_text(x, y, color, str);
draw_text(0x190, y, color, time_str);
}
void draw_text_with_time(u32 x, u32 y, u32 color, const char *str, const int64_t time) {
draw_text_with_time(x, y, color, str, time / 1000000.0f);
}
void intro() {
appletLockExit();
PlFontData font;
consoleInit(NULL);
plGetSharedFontByType(&font, PlSharedFontType_Standard);
FT_Init_FreeType(&library);
FT_New_Memory_Face(library, static_cast<FT_Byte *>(font.address), font.size, 0, &face);
FT_Set_Char_Size(face, 0, 6*64, 300, 300);
gfxSetMode(GfxMode_LinearDouble);
framebuf = (u32 *)gfxGetFramebuffer(&framebuf_width, NULL);
memset(framebuf, 0, gfxGetFramebufferSize());
draw_text(0x10, 0x020, YELLOW, "Lockpick! by shchmue");
draw_set_rect(814, 452 + 42 * 0, 450, 42, RGBA8_MAXALPHA(0xe7, 0x00, 0x00));
draw_set_rect(814, 452 + 42 * 1, 450, 42, RGBA8_MAXALPHA(0xff, 0x8c, 0x00));
draw_set_rect(814, 452 + 42 * 2, 450, 42, RGBA8_MAXALPHA(0xff, 0xef, 0x00));
draw_set_rect(814, 452 + 42 * 3, 450, 42, RGBA8_MAXALPHA(0x00, 0x81, 0x1f));
draw_set_rect(814, 452 + 42 * 4, 450, 42, RGBA8_MAXALPHA(0x00, 0x44, 0xff));
draw_set_rect(814, 452 + 42 * 5, 450, 42, RGBA8_MAXALPHA(0x76, 0x00, 0x89));
if ( !(envIsSyscallHinted(0x60) && // svcDebugActiveProcess
envIsSyscallHinted(0x63) && // svcGetDebugEvent
envIsSyscallHinted(0x65) && // svcGetProcessList
envIsSyscallHinted(0x69) && // svcQueryDebugProcessMemory
envIsSyscallHinted(0x6a))) { // svcReadDebugProcessMemory
draw_text(0x190, 0x20, RED, "Error: Please run with debug svc permissions!");
wait_to_exit(Status_fail);
}
draw_text(0x10, 0x080, CYAN, "Get Tegra keys...");
draw_text(0x10, 0x0a0, CYAN, "Get keys from memory...");
draw_text(0x10, 0x0c0, CYAN, "Get master keys...");
draw_text(0x10, 0x0e0, CYAN, "Derive remaining keys...");
draw_text(0x10, 0x100, CYAN, "Saving keys to keyfile...");
draw_text(0x10, 0x130, CYAN, "Total time elapsed:");
consoleUpdate(NULL);
}
void get_tegra_keys(Key &sbk, Key &tsec, Key &tsec_root) {
// support hekate dump
if (!std::filesystem::exists("/backup"))
return;
for (auto &p : std::filesystem::recursive_directory_iterator("/backup")) {
if (sbk.found() && tsec.found())
return;
if (p.is_regular_file()) {
if (!sbk.found() && (p.file_size() == 0x2fc) &&
(std::string("fuse").compare(std::string(p.path().filename()).substr(0, 4)) == 0))
{
std::ifstream fuse_file(p.path(), std::ios::binary);
byte_vector temp_key(0x10);
fuse_file.seekg(0xa4);
fuse_file.read(reinterpret_cast<char *>(temp_key.data()), 0x10);
sbk = Key("secure_boot_key", 0x10, temp_key);
}
else if (!tsec.found() && (p.file_size() == 0x30) &&
(std::string("tsec").compare(std::string(p.path().filename()).substr(0, 4)) == 0))
{
std::ifstream tsec_file(p.path(), std::ios::binary);
byte_vector temp_key(0x10);
tsec_file.read(reinterpret_cast<char *>(temp_key.data()), 0x10);
tsec = Key("tsec_key", 0x10, temp_key);
tsec_file.read(reinterpret_cast<char *>(temp_key.data()), 0x10);
tsec_root.find_key(temp_key);
}
}
}
// support biskeydump v7 dump
if (std::filesystem::exists("/device.keys")) {
std::ifstream key_file("/device.keys");
for (std::string line; std::getline(key_file, line); !sbk.found() && !tsec.found()) {
line.erase(std::remove_if(
line.begin(), line.end(),
[l = std::locale{}](auto ch) { return std::isspace(ch, l); }
), line.end());
if (line.substr(0, 15).compare("secure_boot_key") == 0)
sbk = Key("secure_boot_key", 0x10, key_string_to_byte_vector(line));
else if (line.substr(0, 8).compare("tsec_key") == 0)
tsec = Key("tsec_key", 0x10, key_string_to_byte_vector(line));
}
}
}
void wait_to_exit(int status) {
if (status == Status_fail)
draw_text(0x1f4, 0x080, RED, ">> Press + to exit <<");
else if (status == Status_success_no_titlekeys)
draw_text(0x1f4, 0x1a0, GREEN, ">> Press + to exit <<");
else if (status == Status_success_titlekeys)
draw_text(0x1f4, 0x1f0, GREEN, ">> Press + to exit <<");
else if (status == Status_success_titlekeys_failed)
draw_text(0x1f4, 0x1f0, RED, ">> Press + to exit <<");
while(appletMainLoop() & (status != Status_success_no_titlekeys)) {
hidScanInput();
u64 kDown = hidKeysDown(CONTROLLER_P1_AUTO);
if (kDown & KEY_PLUS) break;
consoleUpdate(NULL);
}
FT_Done_Face(face);
FT_Done_FreeType(library);
consoleExit(NULL);
appletUnlockExit();
}
void sha256(const u8 *data, u8 *hash, size_t length) {
struct sha256_state ctx;
sha256_init(&ctx);
sha256_update(&ctx, data, length);
sha256_finalize(&ctx);
sha256_finish(&ctx, hash);
}
byte_vector key_string_to_byte_vector(std::string key_string) {
key_string = key_string.substr(key_string.find('=') + 1);
byte_vector temp_key(key_string.size() / 2);
for (size_t i = 0; i < temp_key.size(); i += 8)
*reinterpret_cast<u64 *>(temp_key.data() + i) = __bswap64(strtoul(key_string.substr(i * 2, 0x10).c_str(), NULL, 16));
return temp_key;
}
}
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