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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 "Key.hpp"
#include <machine/endian.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <filesystem>
#include <string>
#include <switch.h>
namespace Common {
static u32 framebuf_width = 0;
static Framebuffer fb;
static u32 stride;
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;
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);
framebufferCreate(&fb, nwindowGetDefault(), FB_WIDTH, FB_HEIGHT, PIXEL_FORMAT_RGBA_8888, 2);
framebufferMakeLinear(&fb);
framebuf = (u32 *)framebufferBegin(&fb, &stride);
framebuf_width = stride / sizeof(u32);
memset(framebuf, 0, stride*FB_HEIGHT);
framebufferEnd(&fb);
draw_text(0x010, 0x020, YELLOW, "Lockpick! by shchmue");
draw_text(0x190, 0x020, YELLOW, "Note:");
draw_text(0x1e0, 0x020, YELLOW, "Lockpick can only dump keys 00-05 (or 00-06 on 6.2.0)");
draw_text(0x1e0, 0x040, CYAN, "Lockpick_RCM");
draw_text(0x2a0, 0x040, YELLOW, "can get newer keys on firmware 7.0.0+!");
draw_set_rect(814, 452 + 42 * 0, 450, 42, FLAG_RED);
draw_set_rect(814, 452 + 42 * 1, 450, 42, FLAG_ORANGE);
draw_set_rect(814, 452 + 42 * 2, 450, 42, FLAG_YELLOW);
draw_set_rect(814, 452 + 42 * 3, 450, 42, FLAG_GREEN);
draw_set_rect(814, 452 + 42 * 4, 450, 42, FLAG_BLUE);
draw_set_rect(814, 452 + 42 * 5, 450, 42, FLAG_VIOLET);
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();
}
draw_text(0x10, 0x060, CYAN, "Get Tegra keys...");
draw_text(0x10, 0x080, CYAN, "Get keys from memory...");
draw_text(0x10, 0x0a0, CYAN, "Get master keys...");
draw_text(0x10, 0x0c0, CYAN, "Derive remaining keys...");
draw_text(0x10, 0x0e0, CYAN, "Saving keys to keyfile...");
draw_text(0x10, 0x110, CYAN, "Total time elapsed:");
update_display();
}
void get_tegra_keys(Key &sbk, Key &tsec, Key &tsec_root) {
// support Hekate dump
if (std::filesystem::exists("/backup")) {
for (auto &p : std::filesystem::recursive_directory_iterator("/backup")) {
if (p.is_regular_file()) {
if (!sbk.found() && (p.file_size() == 0x2fc || p.file_size() == 0x300) &&
((p.path().filename().string().substr(0, 5).compare("fuses") == 0) ||
(p.path().filename().string().substr(0, 11).compare("fuse_cached") == 0)))
{
FILE *fuse_file = fopen(p.path().c_str(), "rb");
if (!fuse_file) continue;
byte_vector temp_key(0x10);
fseek(fuse_file, 0xa4, SEEK_SET);
fread(temp_key.data(), 0x10, 1, fuse_file);
sbk = Key("secure_boot_key", 0x10, temp_key);
fclose(fuse_file);
}
else if (!tsec.found() && (p.file_size() == 0x20 || p.file_size() == 0x30) &&
(p.path().filename().string().substr(0, 4).compare("tsec") == 0))
{
FILE *tsec_file = fopen(p.path().c_str(), "rb");
if (!tsec_file) continue;
byte_vector temp_key(0x10);
fread(temp_key.data(), 0x10, 1, tsec_file);
tsec = Key("tsec_key", 0x10, temp_key);
fread(temp_key.data(), 0x10, 1, tsec_file);
tsec_root.find_key(temp_key);
fclose(tsec_file);
}
}
if (sbk.found() && tsec.found())
return;
}
}
// support biskeydump v7 dump
if (std::filesystem::exists("/device.keys")) {
FILE *key_file = fopen("/device.keys", "r");
char line[0x100];
while (fgets(line, sizeof(line), key_file) && !(sbk.found() && tsec.found())) {
if (strncmp("secure_boot_key", line, 15) == 0)
sbk = Key("secure_boot_key", 0x10, key_string_to_byte_vector(line));
else if (strncmp("tsec_key", line, 8) == 0)
tsec = Key("tsec_key", 0x10, key_string_to_byte_vector(line));
}
fclose(key_file);
}
}
void wait_to_exit() {
draw_text(0x10b, 0x24b, YELLOW, ">> Press + to exit <<");
while(appletMainLoop()) {
hidScanInput();
u64 kDown = hidKeysDown(CONTROLLER_P1_AUTO);
if (kDown & KEY_PLUS) break;
update_display();
}
framebufferClose(&fb);
FT_Done_Face(face);
FT_Done_FreeType(library);
appletUnlockExit();
}
void update_display() {
framebufferBegin(&fb, &stride);
framebufferEnd(&fb);
}
byte_vector key_string_to_byte_vector(std::string key_string) {
key_string = key_string.substr(key_string.find('=') + 2);
byte_vector temp_key((key_string.size() - 1) / 2);
for (size_t i = 0; i < temp_key.size() - 1; 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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