488 lines
14 KiB
C
488 lines
14 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2012 Amaury Pouly
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <getopt.h>
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#include <stdarg.h>
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#include <ctype.h>
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#include "misc.h"
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#include "elf.h"
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#include <sys/stat.h>
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#include "crypt.h"
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#include "fwp.h"
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#include "keysig_search.h"
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#include "upg.h"
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#ifndef MIN
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#define MIN(a,b) ((a) < (b) ? (a) : (b))
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#endif
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bool g_debug = false;
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static char *g_out_prefix = NULL;
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static char *g_in_file = NULL;
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bool g_force = false;
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static const char *g_model = NULL;
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static int g_model_index = -1;
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static char *g_kas = NULL;
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static char *g_key = NULL;
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static char *g_sig = NULL;
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static int g_nr_threads = 1;
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enum keysig_search_method_t g_keysig_search = KEYSIG_SEARCH_NONE;
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#define let_the_force_flow(x) do { if(!g_force) return x; } while(0)
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#define continue_the_force(x) if(x) let_the_force_flow(x)
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#define check_field(v_exp, v_have, str_ok, str_bad) \
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if((v_exp) != (v_have)) \
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{ cprintf(RED, str_bad); let_the_force_flow(__LINE__); } \
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else { cprintf(RED, str_ok); }
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#define cprintf(col, ...) do {color(col); printf(__VA_ARGS__); }while(0)
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#define cprintf_field(str1, ...) do{ cprintf(GREEN, str1); cprintf(YELLOW, __VA_ARGS__); }while(0)
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static void usage(void);
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/* user needs to be pointer to a NWZ_KEYSIG_SIZE-byte buffer, on success g_key
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* and g_sig are updated to point to the key and sig in the buffer */
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static bool upg_notify_keysig(void *user, uint8_t key[NWZ_KEY_SIZE],
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uint8_t sig[NWZ_SIG_SIZE])
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{
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g_key = user;
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g_sig = user + NWZ_KEY_SIZE;
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memcpy(g_key, key, NWZ_KEY_SIZE);
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memcpy(g_sig, sig, NWZ_SIG_SIZE);
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return true;
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}
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static int get_key_and_sig(bool is_extract, void *buf)
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{
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static char keysig[NWZ_KEYSIG_SIZE];
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static char kas[NWZ_KAS_SIZE];
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/* database lookup */
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if(g_model_index != -1)
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g_kas = g_model_list[g_model_index].kas;
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/* always prefer KAS because it contains everything */
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if(g_kas)
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{
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if(strlen(g_kas) != NWZ_KAS_SIZE)
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{
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cprintf(GREY, "The KAS has wrong length (must be %d hex digits)\n", NWZ_KAS_SIZE);
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return 4;
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}
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g_key = keysig;
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g_sig = keysig + NWZ_KEY_SIZE;
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decrypt_keysig(g_kas, g_key, g_sig);
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}
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/* Otherwise require key and signature */
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else if(g_key && g_sig)
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{
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/* check key and signature size */
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if(strlen(g_key) != 8)
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{
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cprintf(GREY, "The specified key has wrong length (must be 8 hex digits)\n");
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return 4;
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}
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if(strlen(g_sig) != 8)
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{
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cprintf(GREY, "The specified sig has wrong length (must be 8 hex digits)\n");
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return 5;
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}
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}
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/* for extraction, we offer a brute force search method from the MD5 */
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else if(is_extract && g_keysig_search != KEYSIG_SEARCH_NONE)
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{
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struct upg_md5_t *md5 = (void *)buf;
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void *encrypted_hdr = (md5 + 1);
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cprintf(BLUE, "keysig Search\n");
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cprintf_field(" Method: ", "%s\n", keysig_search_desc[g_keysig_search].name);
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bool ok = keysig_search(g_keysig_search, encrypted_hdr, 8,
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&upg_notify_keysig, keysig, g_nr_threads);
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cprintf(GREEN, " Result: ");
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cprintf(ok ? YELLOW : RED, "%s\n", ok ? "Key found" : "No key found");
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if(!ok)
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return 2;
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}
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else
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{
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cprintf(GREY, "A KAS or a keysig is needed to decrypt the firmware\n");
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cprintf(GREY, "You have the following options(see help for more details):\n");
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cprintf(GREY, "- select a model with a known KAS\n");
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cprintf(GREY, "- specify an explicit KAS or key+sig\n");
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if(is_extract)
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cprintf(GREY, "- let me try to find the keysig by brute force\n");
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return 1;
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}
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/* If we only have the key and signature, we can create a "fake" KAS
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* that decrypts to the same key and signature. Since it is not unique,
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* it will generally not match the "official" one from Sony but will produce
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* valid files anyway */
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if(!g_kas)
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{
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/* This is useful to print the KAS for the user when brute-forcing since
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* the process will produce a key+sig and the database requires a KAS */
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g_kas = kas;
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encrypt_keysig(g_kas, g_key, g_sig);
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}
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cprintf(BLUE, "Keys\n");
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cprintf_field(" KAS: ", "%."STR(NWZ_KAS_SIZE)"s\n", g_kas);
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cprintf_field(" Key: ", "%."STR(NWZ_KEY_SIZE)"s\n", g_key);
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cprintf_field(" Sig: ", "%."STR(NWZ_SIG_SIZE)"s\n", g_sig);
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return 0;
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}
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static int do_upg(void *buf, long size)
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{
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int ret = get_key_and_sig(true, buf);
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if(ret != 0)
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return ret;
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struct upg_file_t *file = upg_read_memory(buf, size, g_key, g_sig, NULL,
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generic_std_printf);
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if(file == NULL)
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return ret;
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for(int i = 0; i < file->nr_files; i++)
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{
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if(!g_out_prefix)
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continue;
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char *str = malloc(strlen(g_out_prefix) + 32);
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sprintf(str, "%s%d.bin", g_out_prefix, i);
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FILE *f = fopen(str, "wb");
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if(!f)
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{
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cprintf(GREY, "Cannot open '%s' for writing\n", str);
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free(str);
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continue;
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}
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free(str);
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fwrite(file->files[i].data, 1, file->files[i].size, f);
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fclose(f);
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}
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upg_free(file);
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return 0;
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}
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static int extract_upg(int argc, char **argv)
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{
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if(argc == 0 || argc > 1)
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{
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if(argc == 0)
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printf("You must specify a firmware file\n");
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else
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printf("Extra arguments after firmware file\n");
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usage();
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}
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g_in_file = argv[0];
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FILE *fin = fopen(g_in_file, "r");
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if(fin == NULL)
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{
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perror("Cannot open boot file");
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return 1;
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}
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fseek(fin, 0, SEEK_END);
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long size = ftell(fin);
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fseek(fin, 0, SEEK_SET);
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void *buf = malloc(size);
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if(buf == NULL)
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{
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perror("Cannot allocate memory");
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return 1;
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}
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if(fread(buf, size, 1, fin) != 1)
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{
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perror("Cannot read file");
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return 1;
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}
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fclose(fin);
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int ret = do_upg(buf, size);
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if(ret != 0)
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{
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cprintf(GREY, "Error: %d", ret);
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if(!g_force)
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cprintf(GREY, " (use --force to force processing)");
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printf("\n");
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ret = 2;
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}
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free(buf);
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return ret;
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}
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static long filesize(FILE *f)
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{
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long pos = ftell(f);
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fseek(f, 0, SEEK_END);
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long size = ftell(f);
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fseek(f, pos, SEEK_SET);
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return size;
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}
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static int create_upg(int argc, char **argv)
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{
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if(argc == 0)
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{
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cprintf(GREY, "You must specify a firmware filename\n");
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usage();
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}
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int ret = get_key_and_sig(false, NULL);
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if(ret != 0)
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return ret;
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struct upg_file_t *upg = upg_new();
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int nr_files = argc - 1;
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for(int i = 0; i < nr_files; i++)
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{
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FILE *f = fopen(argv[1 + i], "rb");
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if(f == NULL)
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{
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upg_free(upg);
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printf(GREY, "Cannot open input file '%s': %m\n", argv[i + 1]);
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return 1;
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}
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size_t size = filesize(f);
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void *buf = malloc(size);
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if(fread(buf, 1, size, f) != size)
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{
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cprintf(GREY, "Cannot read input file '%s': %m\n", argv[i + 1]);
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fclose(f);
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upg_free(upg);
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return 1;
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}
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fclose(f);
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upg_append(upg, buf, size);
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}
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size_t size = 0;
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void *buf = upg_write_memory(upg, g_key, g_sig, &size, NULL, generic_std_printf);
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upg_free(upg);
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if(buf == NULL)
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{
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cprintf(GREY, "Error creating UPG file\n");
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return 1;
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}
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FILE *fout = fopen(argv[0], "wb");
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if(fout == NULL)
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{
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cprintf(GREY, "Cannot open output firmware file: %m\n");
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free(buf);
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return 1;
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}
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if(fwrite(buf, 1, size, fout) != size)
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{
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cprintf(GREY, "Cannot write output file: %m\n");
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fclose(fout);
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free(buf);
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return 1;
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}
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fclose(fout);
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free(buf);
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return 0;
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}
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static void usage(void)
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{
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color(OFF);
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printf("Usage: upgtool [options] firmware [files...]\n");
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printf("Options:\n");
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printf(" -o <prefix>\t\tSet output prefix\n");
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printf(" -f/--force\t\tForce to continue on errors\n");
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printf(" -?/--help\t\tDisplay this message\n");
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printf(" -d/--debug\t\tDisplay debug messages\n");
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printf(" -c/--no-color\t\tDisable color output\n");
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printf(" -m/--model <model>\tSelect model (or ? to list them)\n");
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printf(" -l/--search <method>\tTry to find the keysig (implies -e)\n");
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printf(" -t/--threads <nr>\tSpecify number of threads to find the keysig\n");
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printf(" -a/--kas <kas>\tForce KAS\n");
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printf(" -k/--key <key>\tForce key\n");
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printf(" -s/--sig <sig>\tForce sig\n");
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printf(" -e/--extract\t\tExtract a UPG archive\n");
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printf(" -c/--create\t\tCreate a UPG archive\n");
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printf("keysig search method:\n");
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for(int i = KEYSIG_SEARCH_FIRST; i < KEYSIG_SEARCH_LAST; i++)
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printf(" %-10s\t%s\n", keysig_search_desc[i].name, keysig_search_desc[i].comment);
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exit(1);
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}
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int main(int argc, char **argv)
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{
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bool extract = false;
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bool create = false;
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if(argc <= 1)
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usage();
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while(1)
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{
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static struct option long_options[] =
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{
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{"help", no_argument, 0, '?'},
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{"debug", no_argument, 0, 'd'},
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{"no-color", no_argument, 0, 'n'},
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{"force", no_argument, 0, 'f'},
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{"model", required_argument, 0, 'm'},
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{"search", required_argument, 0, 'l'},
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{"kas", required_argument, 0, 'a'},
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{"key", required_argument, 0, 'k'},
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{"sig", required_argument, 0, 's'},
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{"extract", no_argument, 0, 'e'},
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{"create", no_argument, 0 ,'c'},
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{"threads", required_argument, 0, 't'},
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{0, 0, 0, 0}
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};
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int c = getopt_long(argc, argv, "?dnfo:m:l:a:k:s:ect:", long_options, NULL);
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if(c == -1)
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break;
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switch(c)
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{
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case -1:
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break;
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case 'n':
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enable_color(false);
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break;
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case 'd':
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g_debug = true;
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break;
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case 'f':
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g_force = true;
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break;
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case '?':
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usage();
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break;
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case 'o':
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g_out_prefix = optarg;
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break;
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case 'm':
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g_model = optarg;
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break;
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case 'l':
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g_keysig_search = KEYSIG_SEARCH_NONE;
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for(int i = KEYSIG_SEARCH_FIRST; i < KEYSIG_SEARCH_LAST; i++)
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if(strcmp(keysig_search_desc[i].name, optarg) == 0)
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g_keysig_search = i;
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if(g_keysig_search == KEYSIG_SEARCH_NONE)
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{
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cprintf(GREY, "Unknown keysig search method '%s'\n", optarg);
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return 1;
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}
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extract = true;
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break;
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case 'a':
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g_kas = optarg;
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break;
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case 'k':
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g_key = optarg;
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break;
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case 's':
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g_sig = optarg;
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break;
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case 'e':
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extract = true;
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break;
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case 'c':
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create = true;
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break;
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case 't':
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g_nr_threads = strtol(optarg, NULL, 0);
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if(g_nr_threads < 1 || g_nr_threads > 128)
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{
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cprintf(GREY, "Invalid number of threads\n");
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return 1;
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}
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break;
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default:
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abort();
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}
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}
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if(g_model && strcmp(g_model, "?") == 0)
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{
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cprintf(BLUE, "Model list:\n");
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for(unsigned i = 0; g_model_list[i].model; i++)
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{
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cprintf(GREEN, " %s:", g_model_list[i].model);
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cprintf(RED, " kas=");
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cprintf(YELLOW, "%s", g_model_list[i].kas);
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if(g_model_list[i].confirmed)
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cprintf(RED, " confirmed");
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else
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cprintf(RED, " guessed");
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printf("\n");
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}
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return 1;
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}
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if(g_model)
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{
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for(unsigned i = 0; g_model_list[i].model; i++)
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if(strcmp(g_model, g_model_list[i].model) == 0)
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g_model_index = i;
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if(g_model_index == -1)
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cprintf(GREY, "Warning: unknown model %s\n", g_model);
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}
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if(!create && !extract)
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{
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printf("You must specify an action (extract or create)\n");
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return 1;
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}
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if(create && extract)
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{
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printf("You cannot specify both create and extract\n");
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return 1;
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}
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if(extract && !g_out_prefix)
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{
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printf("You need to specify output prefix (-o) to extract\n");
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return 1;
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}
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int ret = 0;
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if(create)
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ret = create_upg(argc - optind, argv + optind);
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else if(extract)
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ret = extract_upg(argc - optind, argv + optind);
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else
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{
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printf("Die from lack of action\n");
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ret = 1;
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}
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color(OFF);
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return ret;
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}
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