/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2012 Amaury Pouly * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include #include #include #include #include #include #include #include #include "misc.h" #include "elf.h" #include #ifndef MIN #define MIN(a,b) ((a) < (b) ? (a) : (b)) #endif #define cprintf(col, ...) do {color(col); printf(__VA_ARGS__); }while(0) #define cprintf_field(str1, ...) do{ cprintf(GREEN, str1); cprintf(YELLOW, __VA_ARGS__); }while(0) bool g_debug = false; char *g_out_prefix = NULL; char *g_in_file = NULL; bool g_force = false; #define let_the_force_flow(x) do { if(!g_force) return x; } while(0) #define continue_the_force(x) if(x) let_the_force_flow(x) #define check_field(v_exp, v_have, str_ok, str_bad) \ if((v_exp) != (v_have)) \ { cprintf(RED, str_bad); let_the_force_flow(__LINE__); } \ else { cprintf(RED, str_ok); } static void print_hex(void *p, int size, int unit) { uint8_t *p8 = p; uint16_t *p16 = p; uint32_t *p32 = p; for(int i = 0; i < size; i += unit, p8++, p16++, p32++) { if(i != 0 && (i % 16) == 0) printf("\n"); if(unit == 1) printf(" %02x", *p8); else if(unit == 2) printf(" %04x", *p16); else printf(" %08x", *p32); } } /** * FWU **/ #define FWU_SIG_SIZE 16 #define FWU_BLOCK_SIZE 512 struct fwu_hdr_t { uint8_t sig[FWU_SIG_SIZE]; uint32_t fw_size; uint32_t block_size;// always 512 uint8_t version; uint8_t unk; uint8_t sig2[FWU_SIG_SIZE]; } __attribute__((packed)); const uint8_t g_fwu_signature[FWU_SIG_SIZE] = { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff, 0x75 }; struct version_desc_t { uint8_t version; uint8_t value; uint8_t unk; uint8_t sig2[FWU_SIG_SIZE]; }; struct version_desc_t g_version[] = { { 1, 0xd, 0xd0, { 0x76, 0x5c, 0x50, 0x94, 0x69, 0xb0, 0xa7, 0x03, 0x10, 0xf1, 0x7e, 0xdb, 0x88, 0x90, 0x86, 0x9d } }, { 1, 0xe, 0xd0, { 0x92, 0x22, 0x7a, 0x77, 0x08, 0x67, 0xae, 0x06, 0x16, 0x06, 0xb8, 0x65, 0xa6, 0x42, 0xf7, 0X52 } }, { 3, 0x7e, 0xe1, { 0x3f, 0xad, 0xf8, 0xb0, 0x2e, 0xaf, 0x67, 0x49, 0xb9, 0x85, 0x5f, 0x63, 0x4e, 0x5e, 0x8e, 0x2e } }, }; #define NR_VERSIONS (int)(sizeof(g_version)/sizeof(g_version[0])) typedef struct ptr_bundle_t { uint32_t *ptrA; uint32_t *ptrB; }ptr_bundle_t; struct block_A_info_t { int nr_bits; uint16_t field_2; int nr_words; int nr_dwords_x12; uint32_t *ptr6; // size uint32_t *ptr7; // size uint32_t *ptr5; // size uint32_t size; uint32_t field_1C; ptr_bundle_t ptr1; uint32_t *ptr3; // size uint32_t *ptr4; // size int nr_words2; uint32_t field_34; int nr_dwords_x8; int nr_bytes; int nr_bytes2; int nr_dwords_m1; int nr_dwords_x2_m1; int nr_dwords_x2; int nr_dwords; uint32_t field_54; uint32_t field_58; }; struct block_A_info_t g_decode_A_info; uint8_t g_subblock_A[0x128]; uint8_t g_key_B[20]; uint8_t g_perm_B[258]; uint8_t g_crypto_info_byte; uint8_t *g_decode_buffer; uint8_t *g_decode_buffer2; void *g_decode_buffer3; #include "atj_tables.h" void compute_checksum(uint8_t *buf, int size, uint8_t t[20]) { memset(t, 0, 20); for(int i = 0; i < size; i++) t[i % 20] ^= buf[i]; for(int i = 0; i < 20; i++) t[i] = ~t[i]; } int check_block(uint8_t *buf, uint8_t ref[20], unsigned size) { uint8_t t[20]; compute_checksum(buf, size, t); return memcmp(ref, t, 20); } int get_version(uint8_t *buf, unsigned long size) { (void) size; struct fwu_hdr_t *hdr = (void *)buf; for(int i = 0; i < NR_VERSIONS; i++) if(hdr->version == g_version[i].value) return i; return -1; } static int decode_block_A(uint8_t block[1020]) { uint8_t *p = &g_check_block_A_table[32 * (block[998] & 0x1f)]; uint8_t key[32]; for(int i = 0; i < 20; i++) { block[1000 + i] ^= p[i]; key[i] = block[1000 + i]; } for(int i = 20; i < 32; i++) key[i] = key[i - 20]; for(int i = 0; i < 992; i++) block[i] ^= key[i % 32] ^ g_check_block_A_table[i]; return check_block(block - 1, block + 1000, 1001); } static void compute_perm(uint8_t *keybuf, int size, uint8_t perm[258]) { for(int i = 0; i < 256; i++) perm[i] = i; perm[256] = perm[257] = 0; uint8_t idx = 0; for(int i = 0; i < 256; i++) { uint8_t v = perm[i]; idx = (v + keybuf[i % size] + idx) % 256; perm[i] = perm[idx]; perm[idx] = v; } } static void decode_perm(uint8_t *buf, int size, uint8_t perm[258]) { uint8_t idxa = perm[256]; uint8_t idxb = perm[257]; for(int i = 0; i < size; i++) { idxa = (idxa + 1) % 256; uint8_t v = perm[idxa]; idxb = (idxb + v) % 256; perm[idxa] = perm[idxb]; perm[idxb] = v; buf[i] ^= perm[(v + perm[idxa]) % 256]; } } static void decode_block_with_perm(uint8_t *keybuf, int keysize, uint8_t *buf, int bufsize, uint8_t perm[258]) { compute_perm(keybuf, keysize, perm); decode_perm(buf, bufsize, perm); } static void apply_perm(uint8_t *inbuf, uint8_t *outbuf, int size, int swap) { memcpy(outbuf, inbuf, size); int a = swap & 0xf; int b = (swap >> 4) + 16; uint8_t v = outbuf[a]; outbuf[a] = outbuf[b]; outbuf[b] = v; } static void decode_block_with_swap(uint8_t keybuf[32], int swap, uint8_t *buf, int bufsize, uint8_t perm[258]) { uint8_t keybuf_interm[32]; apply_perm(keybuf, keybuf_interm, 32, swap); decode_block_with_perm(keybuf_interm, 32, buf, bufsize, perm); } static void clear_memory(void *buf, int size_dwords) { memset(buf, 0, 4 * size_dwords); } static void set_bit(int bit_pos, uint32_t *buf) { buf[bit_pos / 32] |= 1 << (bit_pos % 32); } static int fill_decode_info(uint8_t sz) { if(sz == 2) sz = 233; else if(sz == 3) sz = 163; else return 1; g_decode_A_info.nr_bits = sz; g_decode_A_info.nr_bytes2 = sz / 8 + (sz % 8 != 0); g_decode_A_info.nr_words = 2 * g_decode_A_info.nr_bytes2; g_decode_A_info.nr_bytes = sz / 8 + (sz % 8 != 0); g_decode_A_info.nr_words2 = 2 * g_decode_A_info.nr_bytes2; g_decode_A_info.nr_dwords = sz / 32 + (sz % 32 != 0); g_decode_A_info.size = 4 * g_decode_A_info.nr_dwords; g_decode_A_info.nr_dwords_x8 = 8 * g_decode_A_info.nr_dwords; g_decode_A_info.nr_dwords_m1 = g_decode_A_info.nr_dwords - 1; g_decode_A_info.nr_dwords_x2 = 2 * g_decode_A_info.nr_dwords; g_decode_A_info.nr_dwords_x2_m1 = g_decode_A_info.nr_dwords_x2 - 1; g_decode_A_info.nr_dwords_x12 = 12 * g_decode_A_info.nr_dwords; g_decode_A_info.ptr1.ptrA = malloc(4 * g_decode_A_info.nr_dwords); g_decode_A_info.ptr1.ptrB = malloc(g_decode_A_info.size); g_decode_A_info.ptr3 = malloc(g_decode_A_info.size); g_decode_A_info.ptr4 = malloc(g_decode_A_info.size); g_decode_A_info.ptr5 = malloc(g_decode_A_info.size); g_decode_A_info.ptr6 = malloc(g_decode_A_info.size); g_decode_A_info.ptr7 = malloc(g_decode_A_info.size); cprintf(BLUE, " Decode Info:\n"); cprintf_field(" Nr Bits: ", "%d\n", g_decode_A_info.nr_bits); cprintf_field(" Nr Bytes: ", "%d\n", g_decode_A_info.nr_bytes); cprintf_field(" Nr Bytes 2: ", "%d\n", g_decode_A_info.nr_bytes2); cprintf_field(" Nr Words: ", "%d\n", g_decode_A_info.nr_words); cprintf_field(" Nr Words 2: ", "%d\n", g_decode_A_info.nr_words2); cprintf_field(" Nr DWords: ", "%d\n", g_decode_A_info.nr_dwords); cprintf_field(" Size: ", "%d\n", g_decode_A_info.size); return 0; } static int process_block_A(uint8_t block[1024]) { cprintf(BLUE, "Block A\n"); int ret = decode_block_A(block + 4); cprintf(GREEN, " Check: "); check_field(ret, 0, "Pass\n", "Fail\n"); memcpy(g_subblock_A, block, sizeof(g_subblock_A)); ret = fill_decode_info(g_subblock_A[276]); cprintf(GREEN, " Info: "); check_field(ret, 0, "Pass\n", "Fail\n"); int tmp = 2 * g_decode_A_info.nr_bytes2 + 38; int offset = 1004 - tmp + 5; g_crypto_info_byte = block[offset - 1]; g_decode_buffer = malloc(g_decode_A_info.size); g_decode_buffer2 = malloc(g_decode_A_info.size); memset(g_decode_buffer, 0, g_decode_A_info.size); memset(g_decode_buffer2, 0, g_decode_A_info.size); memcpy(g_decode_buffer, &block[offset], g_decode_A_info.nr_bytes2); int offset2 = g_decode_A_info.nr_bytes2 + offset; memcpy(g_decode_buffer2, &block[offset2], g_decode_A_info.nr_bytes2); cprintf_field(" Word: ", "%d ", *(uint16_t *)&g_subblock_A[286]); check_field(*(uint16_t *)&g_subblock_A[286], 1, "Ok\n", "Mismatch\n"); return 0; } static void decode_key_B(uint8_t buf[20], uint8_t buf2[16], uint8_t key[20]) { for(int i = 0; i < 20; i++) { uint8_t v = buf[i] ^ g_decode_B_table[i]; key[i] = v; buf[i] = v ^ buf2[i % 16]; } } static void decode_block_B(uint8_t *buf, uint8_t key[16], int size) { decode_key_B(&buf[size], key, g_key_B); decode_block_with_perm(g_key_B, 20, buf, size, g_perm_B); } static int find_last_bit_set(uint32_t *buf, bool a) { int i = a ? g_decode_A_info.nr_dwords_m1 : g_decode_A_info.nr_dwords_x2_m1; while(i >= 0 && buf[i] == 0) i--; if(i < 0) return -1; for(int j = 31; j >= 0; j--) if(buf[i] & (1 << j)) return 32 * i + j; return -1; // unreachable } static void xor_with_ptrs(uint8_t *buf, ptr_bundle_t *ptrs) { /* int sz = g_decode_A_info.nr_bytes2 - 1; if(sz <= 32) { for(int i = 0; i < sz; i++) buf[i] ^= ptrs->ptrA[i]; for(int i = sz; i < 32; i++) buf[i] ^= ptrs->ptrB[i - sz]; } else for(int i = 0; i < 32; i++) buf[i] ^= ptrs->ptrA[i]; */ uint8_t *ptrA = (uint8_t *)ptrs->ptrA; uint8_t *ptrB = (uint8_t *)ptrs->ptrB; int sz = MIN(g_decode_A_info.nr_bytes2 - 1, 32); for(int i = 0; i < sz; i++) buf[i] ^= ptrA[i]; for(int i = sz; i < 32; i++) buf[i] ^= ptrB[i - sz]; } static void copy_memory(uint32_t *to, uint32_t *from) { for(int i = 0; i < g_decode_A_info.nr_dwords; i++) to[i] = from[i]; } static void swap_memory(uint32_t *a, uint32_t *b) { for(int i = 0; i < g_decode_A_info.nr_dwords; i++) { uint32_t c = a[i]; a[i] = b[i]; b[i] = c; } } static void shift_left(uint32_t *buf, int nr_bits) { for(int i = g_decode_A_info.nr_dwords_m1; i >= 0; i--) buf[i + (nr_bits / 32)] = buf[i]; memset(buf, 0, 4 * (nr_bits / 32)); int size = g_decode_A_info.nr_dwords + (nr_bits + 31) / 32; nr_bits = nr_bits % 32; uint32_t acc = 0; for(int i = 0; i < size; i++) { uint32_t new_val = buf[i] << nr_bits | acc; /* WARNING if nr_bits = 0 then the right shift by 32 is undefined and so * the following code could break. The additional AND catches this case * and make sure the result is 0 */ acc = ((1 << nr_bits) - 1) & (buf[i] >> (32 - nr_bits)); buf[i] = new_val; } } static void xor_big(uint32_t *res, uint32_t *a, uint32_t *b) { for(int i = 0; i < g_decode_A_info.nr_dwords_x2; i++) res[i] = a[i] ^ b[i]; } static void decode_with_xor(uint32_t *res, uint32_t *key) { uint32_t *tmp = malloc(g_decode_A_info.nr_dwords_x8); uint32_t *copy = malloc(g_decode_A_info.nr_dwords_x8); uint32_t *copy_arg = malloc(g_decode_A_info.nr_dwords_x8); uint32_t *tmp2 = malloc(g_decode_A_info.nr_dwords_x8); clear_memory(tmp, g_decode_A_info.nr_dwords_x2); clear_memory(res, g_decode_A_info.nr_dwords); *res = 1; clear_memory(tmp2, g_decode_A_info.nr_dwords); copy_memory(copy_arg, key); copy_memory(copy, (uint32_t *)g_decode_A_info.ptr5); for(int i = find_last_bit_set(copy_arg, 1); i; i = find_last_bit_set(copy_arg, 1)) { int pos = i - find_last_bit_set(copy, 1); if(pos < 0) { swap_memory(copy_arg, copy); swap_memory(res, tmp2); pos = -pos; } copy_memory(tmp, copy); shift_left(tmp, pos); xor_big(copy_arg, copy_arg, tmp); copy_memory(tmp, tmp2); shift_left(tmp, pos); xor_big(res, res, tmp); } free(tmp); free(copy); free(copy_arg); free(tmp2); } static void shift_left_one(uint32_t *a) { int pos = find_last_bit_set(a, 0) / 32 + 1; if(pos <= 0) return; uint32_t v = 0; for(int i = 0; i < pos; i++) { uint32_t new_val = v | a[i] << 1; v = a[i] >> 31; a[i] = new_val; } if(v) a[pos] = v; } #if 1 static void xor_mult(uint32_t *a1, uint32_t *a2, uint32_t *a3) { uint32_t *tmp2 = malloc(g_decode_A_info.nr_dwords_x8); clear_memory(tmp2, g_decode_A_info.nr_dwords_x2); copy_memory(tmp2, a3); int pos = g_decode_A_info.nr_dwords; uint32_t mask = 1; for(int i = 0; i < 32; i++) { for(int j = 0; j < g_decode_A_info.nr_dwords; j++) { if(a2[j] & mask) for(int k = 0; k < pos; k++) a1[j + k] ^= tmp2[k]; } shift_left_one(tmp2); mask <<= 1; pos = find_last_bit_set(tmp2, 0) / 32 + 1; } free(tmp2); } #else static void xor_mult(uint32_t *a1, uint32_t *a2, uint32_t *a3) { for(int i = 0; i < 32 * g_decode_A_info.nr_dwords; i++) for(int j = 0; j < 32 * g_decode_A_info.nr_dwords; j++) { int k = i + j; uint32_t v1 = (a2[i / 32] >> (i % 32)) & 1; uint32_t v2 = (a3[j / 32] >> (j % 32)) & 1; a1[k / 32] ^= (v1 * v2) << (k % 32); } } #endif static int compare(uint32_t *a, uint32_t *b) { return memcmp(a, b, g_decode_A_info.nr_dwords * 4); } static void xor_mult_high(uint32_t *a1, uint32_t *buf, uint32_t *a3) { (void) a1; uint32_t *tmp = malloc(g_decode_A_info.nr_dwords_x8); int v4 = g_decode_A_info.field_34; int pos = find_last_bit_set(buf, 0); for(int i = pos - v4; i >= 0; i = find_last_bit_set(buf, 0) - v4) { clear_memory(tmp, g_decode_A_info.nr_dwords_x2); copy_memory(tmp, a3); shift_left(tmp, i); xor_big(buf, buf, tmp); } free(tmp); } static void xor_small(uint32_t *res, uint32_t *a, uint32_t *b) { for(int i = 0; i < g_decode_A_info.nr_dwords; i++) res[i] = a[i] ^ b[i]; } static void crypto(ptr_bundle_t *a1, ptr_bundle_t *a2) { uint32_t *v2 = malloc(g_decode_A_info.nr_dwords_x8); uint32_t *v3 = malloc(g_decode_A_info.nr_dwords_x8); uint32_t *v4 = malloc(g_decode_A_info.nr_dwords_x8); uint32_t *v5 = malloc(g_decode_A_info.nr_dwords_x8); uint32_t *v6 = malloc(g_decode_A_info.nr_dwords_x8); clear_memory(a2->ptrA, g_decode_A_info.nr_dwords); clear_memory(a2->ptrB, g_decode_A_info.nr_dwords); clear_memory(v3, g_decode_A_info.nr_dwords_x2); clear_memory(v6, g_decode_A_info.nr_dwords_x2); clear_memory(v4, g_decode_A_info.nr_dwords_x2); decode_with_xor(v4, a1->ptrA); clear_memory(v5, g_decode_A_info.nr_dwords_x2); xor_mult(v5, v4, a1->ptrB); xor_mult_high(v5, v5, g_decode_A_info.ptr5); xor_small(v2, a1->ptrA, v5); xor_small(v4, v2, g_decode_A_info.ptr6); clear_memory(v3, g_decode_A_info.nr_dwords_x2); xor_mult(v3, v2, v2); xor_mult_high(v3, v3, g_decode_A_info.ptr5); xor_small(a2->ptrA, v4, v3); clear_memory(v5, g_decode_A_info.nr_dwords_x2); xor_small(v4, v2, g_xor_key); xor_mult(v5, v4, a2->ptrA); xor_mult_high(v5, v5, g_decode_A_info.ptr5); clear_memory(v6, g_decode_A_info.nr_dwords_x2); xor_mult(v6, a1->ptrA, a1->ptrA); xor_mult_high(v6, v6, g_decode_A_info.ptr5); xor_small(a2->ptrB, v5, v6); free(v2); free(v3); free(v4); free(v5); free(v6); } static void crypto2(ptr_bundle_t *a1, ptr_bundle_t *a2, ptr_bundle_t *a3) { uint32_t *v3 = malloc(g_decode_A_info.nr_dwords_x8); uint32_t *v4 = malloc(g_decode_A_info.nr_dwords_x8); uint32_t *v5 = malloc(g_decode_A_info.nr_dwords_x8); uint32_t *v6 = malloc(g_decode_A_info.nr_dwords_x8); uint32_t *v7 = malloc(g_decode_A_info.nr_dwords_x8); clear_memory(a3->ptrA, g_decode_A_info.nr_dwords); clear_memory(a3->ptrB, g_decode_A_info.nr_dwords); clear_memory(v4, g_decode_A_info.nr_dwords_x2); clear_memory(v7, g_decode_A_info.nr_dwords_x2); xor_small(v5, a1->ptrB, a2->ptrB); xor_small(v6, a1->ptrA, a2->ptrA); decode_with_xor(v7, v6); clear_memory(v3, g_decode_A_info.nr_dwords_x2); xor_mult(v3, v7, v5); xor_mult_high(v3, v3, g_decode_A_info.ptr5); xor_small(v5, v3, g_decode_A_info.ptr6); clear_memory(v4, g_decode_A_info.nr_dwords_x2); xor_mult(v4, v3, v3); xor_mult_high(v4, v4, g_decode_A_info.ptr5); xor_small(v7, v5, v4); xor_small(a3->ptrA, v7, v6); xor_small(v5, a1->ptrA, a3->ptrA); xor_small(v6, a3->ptrA, a1->ptrB); clear_memory(v7, g_decode_A_info.nr_dwords_x2); xor_mult(v7, v5, v3); xor_mult_high(v7, v7, g_decode_A_info.ptr5); xor_small(a3->ptrB, v7, v6); free(v3); free(v4); free(v5); free(v6); free(v7); } static int crypto3(uint32_t *a1, ptr_bundle_t *ptrs_alt, ptr_bundle_t *ptrs) { ptr_bundle_t ptrs_others; ptrs_others.ptrA = malloc(g_decode_A_info.size); ptrs_others.ptrB = malloc(g_decode_A_info.size); clear_memory(ptrs->ptrA, g_decode_A_info.nr_dwords); clear_memory(ptrs->ptrB, g_decode_A_info.nr_dwords); clear_memory(ptrs_others.ptrA, g_decode_A_info.nr_dwords); clear_memory(ptrs_others.ptrB, g_decode_A_info.nr_dwords); int pos = find_last_bit_set(a1, 1); copy_memory(ptrs_others.ptrA, ptrs_alt->ptrA); copy_memory(ptrs_others.ptrB, ptrs_alt->ptrB); for(int bit = (pos % 32) - 1; bit >= 0; bit--) { crypto(&ptrs_others, ptrs); copy_memory(ptrs_others.ptrA, ptrs->ptrA); copy_memory(ptrs_others.ptrB, ptrs->ptrB); if(a1[pos / 32] & (1 << bit)) { crypto2(&ptrs_others, ptrs_alt, ptrs); copy_memory(ptrs_others.ptrA, ptrs->ptrA); copy_memory(ptrs_others.ptrB, ptrs->ptrB); } } for(int i = pos / 32 - 1; i >= 0; i--) { for(int bit = 31; bit >= 0; bit--) { crypto(&ptrs_others, ptrs); copy_memory(ptrs_others.ptrA, ptrs->ptrA); copy_memory(ptrs_others.ptrB, ptrs->ptrB); if(a1[i] & (1 << bit)) { crypto2(&ptrs_others, ptrs_alt, ptrs); copy_memory(ptrs_others.ptrA, ptrs->ptrA); copy_memory(ptrs_others.ptrB, ptrs->ptrB); } } } copy_memory(ptrs->ptrA, ptrs_others.ptrA); copy_memory(ptrs->ptrB, ptrs_others.ptrB); free(ptrs_others.ptrA); free(ptrs_others.ptrB); return 0; } static int crypto4(uint8_t *a1, ptr_bundle_t *ptrs, uint32_t *a3) { ptr_bundle_t ptrs_others; ptrs_others.ptrA = malloc(g_decode_A_info.size); ptrs_others.ptrB = malloc(g_decode_A_info.size); clear_memory(ptrs_others.ptrA, g_decode_A_info.nr_dwords); clear_memory(ptrs_others.ptrB, g_decode_A_info.nr_dwords); int ret = crypto3(a3, ptrs, &ptrs_others); if(ret == 0) xor_with_ptrs(a1, &ptrs_others); free(ptrs_others.ptrA); free(ptrs_others.ptrB); return ret; } static int crypto_bits(uint32_t *buf, int a2) { clear_memory(buf, g_decode_A_info.nr_dwords); g_decode_A_info.field_34 = 0; if(a2 == 4) { set_bit(0, buf); set_bit(74, buf); set_bit(233, buf); g_decode_A_info.field_34 = 233; return 0; } else if (a2 == 5) { set_bit(0, buf); set_bit(3, buf); set_bit(6, buf); set_bit(7, buf); set_bit(163, buf); g_decode_A_info.field_34 = 163; return 0; } else return 1; } static int crypto_bits_copy(ptr_bundle_t *a1, char a2) { int ret = crypto_bits(g_decode_A_info.ptr5, a2); if(ret) return ret; if(a2 == 4) { copy_memory(a1->ptrA, g_crypto_table); copy_memory(a1->ptrB, g_crypto_table2); copy_memory(g_decode_A_info.ptr6, g_crypto_data); copy_memory(g_decode_A_info.ptr7, g_crypto_key6); return 0; } else if ( a2 == 5 ) { copy_memory(a1->ptrA, g_crypto_key3); copy_memory(a1->ptrB, g_crypto_key4); copy_memory(g_decode_A_info.ptr6, g_crypto_data3); copy_memory(g_decode_A_info.ptr7, g_crypto_key5); return 0; } else return 1; } static void create_guid(void *uid, int bit_size) { uint8_t *p = uid; for(int i = 0; i < bit_size / 8; i++) p[i] = rand() % 256; } static int process_block_B(uint8_t block[512]) { cprintf(BLUE, "Block B\n"); decode_block_B(block + 3, g_subblock_A + 4, 489); cprintf_field(" Word: ", "%d ", *(uint16_t *)(block + 3)); check_field(*(uint16_t *)(block + 3), 1, "Ok\n", "Mismatch\n"); int ret = check_block(block, block + 492, 492); cprintf(GREEN, " Check: "); check_field(ret, 0, "Pass\n", "Fail\n"); g_decode_buffer3 = malloc(g_decode_A_info.size); memset(g_decode_buffer3, 0, g_decode_A_info.size); int offset = *(uint16_t *)(block + 13) + 16; memcpy(g_decode_buffer3, &block[offset], g_decode_A_info.nr_bytes2); return 0; } static int do_fwu_v3(int size, uint8_t *buf, uint8_t *blockA, uint8_t *blockB, uint8_t *unk, uint8_t *unk2, uint8_t *blo) { (void) size; uint8_t smallblock[512]; uint8_t bigblock[1024]; memset(smallblock, 0, sizeof(smallblock)); memset(bigblock, 0, sizeof(bigblock)); uint8_t ba = buf[0x1ee] & 0xf; uint8_t bb = buf[0x1fe] & 0xf; cprintf_field(" Block A: ", "%d\n", ba + 2); cprintf(" Block B: ", "%d\n", ba + bb + 5); *blockA = buf[494] & 0xf; *blockB = buf[510] & 0xf; memcpy(bigblock, &buf[512 * (*blockA + 2)], sizeof(bigblock)); int ret = process_block_A(bigblock); continue_the_force(ret); memcpy(smallblock, &buf[512 * (*blockA + *blockB + 5)], sizeof(smallblock)); ret = process_block_B(smallblock); continue_the_force(ret); cprintf(BLUE, "Main\n"); // WARNING you need more that 48 because 17+32 > 48 !! (see code below) */ uint8_t smallbuf[50]; memcpy(smallbuf, buf + 42, sizeof(smallbuf)); cprintf_field(" Byte: ", "%d ", smallbuf[16]); check_field(smallbuf[16], 3, "Ok\n", "Mismatch\n"); ptr_bundle_t ptrs; ptrs.ptrA = malloc(g_decode_A_info.size); ptrs.ptrB = malloc(g_decode_A_info.size); memset(ptrs.ptrA, 0, g_decode_A_info.size); memset(ptrs.ptrB, 0, g_decode_A_info.size); memcpy(ptrs.ptrA, buf + 91, g_decode_A_info.nr_bytes2); memcpy(ptrs.ptrB, buf + 91 + g_decode_A_info.nr_bytes2, g_decode_A_info.nr_bytes2); ret = crypto_bits_copy(&g_decode_A_info.ptr1, g_crypto_info_byte); cprintf(GREEN, " Crypto bits copy: "); check_field(ret, 0, "Pass\n", "Fail\n"); ret = crypto4(smallbuf + 17, &ptrs, g_decode_buffer3); cprintf(GREEN, " Crypto 4: "); check_field(ret, 0, "Pass\n", "Fail\n"); memcpy(unk2, &smallbuf[17], 32); int offset = g_decode_A_info.nr_words + 91; decode_block_with_swap(unk2, 0, &buf[offset], 512 - offset, g_perm_B); int pos = *(uint16_t *)&buf[offset]; cprintf_field(" Word: ", "%d ", pos); int tmp = g_decode_A_info.nr_words2 + 199; check_field(pos, 510 - tmp, "Ok\n", "Mismatch\n"); uint8_t midbuf[108]; memcpy(midbuf, &buf[pos + offset + 2], sizeof(midbuf)); cprintf_field(" Byte: ", "%d ", midbuf[0]); check_field(midbuf[0], 2, "Ok\n", "Invalid\n"); cprintf_field(" DWord: ", "%d ", *(uint32_t *)&midbuf[1]); check_field(*(uint32_t *)&midbuf[1], 2056, "Ok\n", "Invalid\n"); cprintf_field(" DWord: ", "%d ", *(uint32_t *)&midbuf[5]); check_field(*(uint32_t *)&midbuf[5], 8, "Ok\n", "Invalid\n"); cprintf_field(" Byte: ", "%d ", midbuf[41]); check_field(midbuf[41], 190, "Ok\n", "Invalid\n"); memset(blo, 0, 512); create_guid(smallblock, 3808); memcpy(smallblock + 476, midbuf + 42, 16); compute_checksum(smallblock, 492, blo + 492); int bsz = blo[500]; memcpy(blo, smallblock, bsz); memcpy(blo + bsz, midbuf + 42, 16); memcpy(blo + bsz + 16, smallblock + bsz, 476 - bsz); decode_block_with_perm(blo + 492, 16, blo, 492, g_perm_B); ret = check_block(buf + 42, midbuf + 88, 450); cprintf(GREEN, " Decode block: "); check_field(ret, 0, "Pass\n", "Fail\n"); ret = memcmp(g_subblock_A + 4, midbuf + 9, 16); cprintf(GREEN, " Compare: "); check_field(ret, 0, "Pass\n", "Fail\n"); uint8_t zero[16]; memset(zero, 0, sizeof(zero)); ret = memcmp(unk, zero, sizeof(zero)); cprintf(GREEN, " Sanity: "); check_field(ret, 0, "Pass\n", "Fail\n"); /* ret = memcmp(midbuf + 25, zero, sizeof(zero)); cprintf(GREEN, " Sanity: "); check_field(ret, 0, "Pass\n", "Fail\n"); */ return 0; } static int do_sthg_fwu_v3(uint8_t *buf, int *size, uint8_t *unk, uint8_t *block) { uint8_t blockA; uint8_t blockB; uint8_t unk2[32]; memset(unk2, 0, sizeof(unk2)); int ret = do_fwu_v3(*size, buf, &blockA, &blockB, unk, unk2, block); continue_the_force(ret); *size -= 2048; uint8_t *tmpbuf = malloc(*size); memset(tmpbuf, 0, *size); int offsetA = (blockA + 1) << 9; int offsetB = (blockB + 1) << 9; memcpy(tmpbuf, buf + 512, offsetA); memcpy(tmpbuf + offsetA, buf + offsetA + 1536, offsetB); memcpy(tmpbuf + offsetA + offsetB, buf + offsetA + 1536 + offsetB + 512, *size - offsetA - offsetB); compute_perm(unk2, 32, g_perm_B); decode_perm(tmpbuf, *size, g_perm_B); memcpy(buf, tmpbuf, *size); return 0; } /* [add]: string to add when there is no extension * [replace]: string to replace extension */ static void build_out_prefix(char *add, char *replace, bool slash) { if(g_out_prefix) return; /** copy input filename with extra space */ g_out_prefix = malloc(strlen(g_in_file) + strlen(add) + 16); strcpy(g_out_prefix, g_in_file); /** remove extension and add '/' */ char *filename = strrchr(g_out_prefix, '/'); // have p points to the beginning or after the last '/' filename = (filename == NULL) ? g_out_prefix : filename + 1; // extension ? char *dot = strrchr(filename, '.'); if(dot) { *dot = 0; // cut at the dot strcat(dot, replace); } else strcat(filename, add); // add extra string if(slash) { strcat(filename, "/"); /** make sure the directory exists */ mkdir(g_out_prefix, S_IRWXU | S_IRGRP | S_IROTH); } } static int do_fwu(uint8_t *buf, int size) { struct fwu_hdr_t *hdr = (void *)buf; if(size < (int)sizeof(struct fwu_hdr_t)) { cprintf(GREY, "File too small\n"); return 1; } cprintf(BLUE, "Header\n"); cprintf(GREEN, " Signature:"); for(int i = 0; i < FWU_SIG_SIZE; i++) cprintf(YELLOW, " %02x", hdr->sig[i]); if(memcmp(hdr->sig, g_fwu_signature, FWU_SIG_SIZE) == 0) cprintf(RED, " Ok\n"); else { cprintf(RED, " Mismatch\n"); let_the_force_flow(__LINE__); } cprintf_field(" FW size: ", "%d ", hdr->fw_size); if((int)hdr->fw_size == size) cprintf(RED, " Ok\n"); else if((int)hdr->fw_size < size) cprintf(RED, " Ok (file greater than firmware)\n"); else { cprintf(RED, " Error (file too small)\n"); let_the_force_flow(__LINE__); } cprintf_field(" Block size: ", "%d ", hdr->block_size); check_field(hdr->block_size, FWU_BLOCK_SIZE, "Ok\n", "Invalid\n"); cprintf_field(" Version: ", "%x ", hdr->version); int ver = get_version(buf, size); if(ver < 0) { cprintf(RED, "(Unknown)\n"); return -1; } else cprintf(RED, "(Ver. %d)\n", g_version[ver].version); cprintf_field(" Unknown: ", "0x%x ", hdr->unk); check_field(hdr->unk, g_version[ver].unk, "Ok\n", "Invalid\n"); cprintf(GREEN, " Signature:"); for(int i = 0; i < FWU_SIG_SIZE; i++) cprintf(YELLOW, " %02x", hdr->sig2[i]); if(memcmp(hdr->sig2, g_version[ver].sig2, FWU_SIG_SIZE) == 0) cprintf(RED, " Ok\n"); else { cprintf(RED, " Mismatch\n"); let_the_force_flow(__LINE__); } build_out_prefix(".afi", ".afi", false); if(g_version[ver].version == 3) { uint8_t unk[32]; memset(unk, 0, sizeof(unk)); uint8_t block[512]; memset(block, 0, sizeof(block)); int ret = do_sthg_fwu_v3(buf, &size, unk, block); continue_the_force(ret); cprintf(GREY, "Descrambling to %s... ", g_out_prefix); FILE *f = fopen(g_out_prefix, "wb"); if(f) { fwrite(buf, size, 1, f); fclose(f); cprintf(RED, "Ok\n"); } else cprintf(RED, "Failed: %m\n"); } return 0; } static bool check_fwu(uint8_t *buf, int size) { struct fwu_hdr_t *hdr = (void *)buf; if(size < (int)sizeof(struct fwu_hdr_t)) return false; return memcmp(hdr->sig, g_fwu_signature, FWU_SIG_SIZE) == 0; } /** * AFI * * part of this work comes from s1mp3/s1fwx **/ #define AFI_ENTRIES 126 #define AFI_SIG_SIZE 4 struct afi_hdr_t { uint8_t sig[AFI_SIG_SIZE]; uint16_t vendor_id; uint16_t product_id; uint8_t ver_id[2]; uint8_t ext_ver_id[2]; uint8_t year[2]; uint8_t month; uint8_t day; uint32_t afi_size; uint32_t res[3]; } __attribute__((packed)); struct afi_entry_t { char name[8]; char ext[3]; char type; uint32_t addr; uint32_t offset; uint32_t size; char desc[4]; uint32_t checksum; } __attribute__((packed)); struct afi_post_hdr_t { uint8_t res[28]; uint32_t checksum; } __attribute__((packed)); struct afi_t { struct afi_hdr_t hdr; struct afi_entry_t entry[AFI_ENTRIES]; struct afi_post_hdr_t post; }; #define AFI_ENTRY_BREC 'B' #define AFI_ENTRY_FWSC 'F' #define AFI_ENTRY_ADFUS 'A' #define AFI_ENTRY_FW 'I' #define AFI_ENTRY_DLADR_BREC 0x00000006 // 'B' #define AFI_ENTRY_DLADR_FWSC 0x00020008 // 'F' #define AFI_ENTRY_DLADR_ADFUS 0x000C0008 // 'A' #define AFI_ENTRY_DLADR_ADFU 0x00000000 // 'U' #define AFI_ENTRY_DLADR_FW 0x00000011 // 'I' const uint8_t g_afi_signature[AFI_SIG_SIZE] = { 'A', 'F', 'I', 0 }; static uint32_t afi_checksum(void *ptr, int size) { uint32_t crc = 0; uint32_t *cp = ptr; for(; size >= 4; size -= 4) crc += *cp++; if(size == 1) crc += *(uint8_t *)cp; else if(size == 2) crc += *(uint16_t *)cp; else if(size == 3) crc += *(uint16_t *)cp + ((*(uint8_t *)(cp + 2)) << 16); return crc; } static void build_filename(char buf[16], struct afi_entry_t *ent) { int pos = 0; for(int i = 0; i < 8 && ent->name[i] != ' '; i++) buf[pos++] = ent->name[i]; buf[pos++] = '.'; for(int i = 0; i < 3 && ent->ext[i] != ' '; i++) buf[pos++] = ent->ext[i]; buf[pos] = 0; } static int do_afi(uint8_t *buf, int size) { struct afi_t *afi = (void *)buf; if(size < (int)sizeof(struct afi_t)) { cprintf(GREY, "File too small\n"); return 1; } cprintf(BLUE, "Header\n"); cprintf(GREEN, " Signature:"); for(int i = 0; i < AFI_SIG_SIZE; i++) cprintf(YELLOW, " %02x", afi->hdr.sig[i]); if(memcmp(afi->hdr.sig, g_afi_signature, AFI_SIG_SIZE) == 0) cprintf(RED, " Ok\n"); else { cprintf(RED, " Mismatch\n"); let_the_force_flow(__LINE__); } cprintf_field(" Vendor ID: ", "0x%x\n", afi->hdr.vendor_id); cprintf_field(" Product ID: ", "0x%x\n", afi->hdr.product_id); cprintf_field(" Version: ", "%x.%x\n", afi->hdr.ver_id[0], afi->hdr.ver_id[1]); cprintf_field(" Ext Version: ", "%x.%x\n", afi->hdr.ext_ver_id[0], afi->hdr.ext_ver_id[1]); cprintf_field(" Date: ", "%02x/%02x/%02x%02x\n", afi->hdr.day, afi->hdr.month, afi->hdr.year[0], afi->hdr.year[1]); cprintf_field(" AFI size: ", "%d ", afi->hdr.afi_size); if((int)afi->hdr.afi_size == size) cprintf(RED, " Ok\n"); else if((int)afi->hdr.afi_size < size) cprintf(RED, " Ok (file greater than archive)\n"); else { cprintf(RED, " Error (file too small)\n"); let_the_force_flow(__LINE__); } cprintf_field(" Reserved: ", "%x %x %x\n", afi->hdr.res[0], afi->hdr.res[1], afi->hdr.res[2]); build_out_prefix(".fw", "", true); cprintf(BLUE, "Entries\n"); for(int i = 0; i < AFI_ENTRIES; i++) { if(afi->entry[i].name[0] == 0) continue; struct afi_entry_t *entry = &afi->entry[i]; char filename[16]; build_filename(filename, entry); cprintf(RED, " %s\n", filename); cprintf_field(" Type: ", "%02x", entry->type); if(isprint(entry->type)) cprintf(RED, " %c", entry->type); printf("\n"); cprintf_field(" Addr: ", "0x%x\n", entry->addr); cprintf_field(" Offset: ", "0x%x\n", entry->offset); cprintf_field(" Size: ", "0x%x\n", entry->size); cprintf_field(" Desc: ", "%.4s\n", entry->desc); cprintf_field(" Checksum: ", "0x%x ", entry->checksum); uint32_t chk = afi_checksum(buf + entry->offset, entry->size); cprintf(RED, "%s\n", chk == entry->checksum ? "Ok" : "Mismatch"); char *name = malloc(strlen(g_out_prefix) + strlen(filename) + 16); sprintf(name, "%s%s", g_out_prefix, filename); cprintf(GREY, "Unpacking to %s... ", name); FILE *f = fopen(name, "wb"); if(f) { fwrite(buf + entry->offset, entry->size, 1, f); fclose(f); cprintf(RED, "Ok\n"); } else cprintf(RED, "Failed: %m\n"); } cprintf(BLUE, "Post Header\n"); cprintf_field(" Checksum: ", "%x ", afi->post.checksum); uint32_t chk = afi_checksum(buf, sizeof(struct afi_t) - 4); cprintf(RED, "%s\n", chk == afi->post.checksum ? "Ok" : "Mismatch"); return 0; } static bool check_afi(uint8_t *buf, int size) { struct afi_hdr_t *hdr = (void *)buf; if(size < (int)sizeof(struct afi_hdr_t)) return false; return memcmp(hdr->sig, g_afi_signature, AFI_SIG_SIZE) == 0; } /** * FW **/ #define FW_SIG_SIZE 4 #define FW_ENTRIES 240 struct fw_entry_t { char name[8]; char ext[3]; uint8_t attr; uint8_t res[2]; uint16_t version; uint32_t block_offset; // offset shift by 9 uint32_t size; uint32_t unk; uint32_t checksum; } __attribute__((packed)); struct fw_hdr_t { uint8_t sig[FW_SIG_SIZE]; uint32_t res[4]; uint8_t year[2]; uint8_t month; uint8_t day; uint16_t usb_vid; uint16_t usb_pid; uint32_t checksum; char productor[16]; char str2[16]; char str3[32]; char dev_name[32]; uint8_t res2[8 * 16]; char usb_name1[8]; char usb_name2[8]; char res3[4 * 16 + 1]; char mtp_name1[33]; char mtp_name2[33]; char mtp_ver[33]; uint16_t mtp_vid; uint16_t mtp_pid; char fw_ver[64]; uint32_t res4[2]; struct fw_entry_t entry[FW_ENTRIES]; } __attribute__((packed)); const uint8_t g_fw_signature[FW_SIG_SIZE] = { 0x55, 0xaa, 0xf2, 0x0f }; static void build_filename_fw(char buf[16], struct fw_entry_t *ent) { int pos = 0; for(int i = 0; i < 8 && ent->name[i] != ' '; i++) buf[pos++] = ent->name[i]; buf[pos++] = '.'; for(int i = 0; i < 3 && ent->ext[i] != ' '; i++) buf[pos++] = ent->ext[i]; buf[pos] = 0; } static int do_fw(uint8_t *buf, int size) { struct fw_hdr_t *hdr = (void *)buf; if(size < (int)sizeof(struct fw_hdr_t)) { cprintf(GREY, "File too small\n"); return 1; } cprintf(BLUE, "Header\n"); cprintf(GREEN, " Signature:"); for(int i = 0; i < FW_SIG_SIZE; i++) cprintf(YELLOW, " %02x", hdr->sig[i]); if(memcmp(hdr->sig, g_fw_signature, FW_SIG_SIZE) == 0) cprintf(RED, " Ok\n"); else { cprintf(RED, " Mismatch\n"); let_the_force_flow(__LINE__); } cprintf_field(" USB VID: ", "0x%x\n", hdr->usb_vid); cprintf_field(" USB PID: ", "0x%x\n", hdr->usb_pid); cprintf_field(" Date: ", "%x/%x/%x%x\n", hdr->day, hdr->month, hdr->year[0], hdr->year[1]); cprintf_field(" Checksum: ", "%x\n", hdr->checksum); cprintf_field(" Productor: ", "%.16s\n", hdr->productor); cprintf_field(" String 2: ", "%.16s\n", hdr->str2); cprintf_field(" String 3: ", "%.32s\n", hdr->str3); cprintf_field(" Device Name: ", "%.32s\n", hdr->dev_name); cprintf(GREEN, " Unknown:\n"); for(int i = 0; i < 8; i++) { cprintf(YELLOW, " "); for(int j = 0; j < 16; j++) cprintf(YELLOW, "%02x ", hdr->res2[i * 16 + j]); cprintf(YELLOW, "\n"); } cprintf_field(" USB Name 1: ", "%.8s\n", hdr->usb_name1); cprintf_field(" USB Name 2: ", "%.8s\n", hdr->usb_name2); cprintf_field(" MTP Name 1: ", "%.32s\n", hdr->mtp_name1); cprintf_field(" MTP Name 2: ", "%.32s\n", hdr->mtp_name2); cprintf_field(" MTP Version: ", "%.32s\n", hdr->mtp_ver); cprintf_field(" MTP VID: ", "0x%x\n", hdr->mtp_vid); cprintf_field(" MTP PID: ", "0x%x\n", hdr->mtp_pid); cprintf_field(" FW Version: ", "%.64s\n", hdr->fw_ver); build_out_prefix(".unpack", "", true); cprintf(BLUE, "Entries\n"); for(int i = 0; i < AFI_ENTRIES; i++) { if(hdr->entry[i].name[0] == 0) continue; struct fw_entry_t *entry = &hdr->entry[i]; char filename[16]; build_filename_fw(filename, entry); cprintf(RED, " %s\n", filename); cprintf_field(" Attr: ", "%02x\n", entry->attr); cprintf_field(" Offset: ", "0x%x\n", entry->block_offset << 9); cprintf_field(" Size: ", "0x%x\n", entry->size); cprintf_field(" Unknown: ", "%x\n", entry->unk); cprintf_field(" Checksum: ", "0x%x ", entry->checksum); uint32_t chk = afi_checksum(buf + (entry->block_offset << 9), entry->size); cprintf(RED, "%s\n", chk == entry->checksum ? "Ok" : "Mismatch"); if(g_out_prefix) { char *name = malloc(strlen(g_out_prefix) + strlen(filename) + 16); sprintf(name, "%s%s", g_out_prefix, filename); cprintf(GREY, "Unpacking to %s... ", name); FILE *f = fopen(name, "wb"); if(f) { fwrite(buf + (entry->block_offset << 9), entry->size, 1, f); fclose(f); cprintf(RED, "Ok\n"); } else cprintf(RED, "Failed: %m\n"); } } return 0; } static bool check_fw(uint8_t *buf, int size) { struct fw_hdr_t *hdr = (void *)buf; if(size < (int)sizeof(struct fw_hdr_t)) return false; return memcmp(hdr->sig, g_fw_signature, FW_SIG_SIZE) == 0; } static void usage(void) { printf("Usage: atjboottool [options] firmware\n"); printf("Options:\n"); printf(" -o \tSet output prefix\n"); printf(" -f/--force\tForce to continue on errors\n"); printf(" -?/--help\tDisplay this message\n"); printf(" -d/--debug\tDisplay debug messages\n"); printf(" -c/--no-color\tDisable color output\n"); printf(" --fwu\tUnpack a FWU firmware file\n"); printf(" --afi\tUnpack a AFI archive file\n"); printf(" --fw\tUnpack a FW archive file\n"); printf("The default is to try to guess the format.\n"); printf("If several formats are specified, all are tried.\n"); printf("If no output prefix is specified, a default one is picked.\n"); exit(1); } int main(int argc, char **argv) { bool try_fwu = false; bool try_afi = false; bool try_fw = false; while(1) { static struct option long_options[] = { {"help", no_argument, 0, '?'}, {"debug", no_argument, 0, 'd'}, {"no-color", no_argument, 0, 'c'}, {"force", no_argument, 0, 'f'}, {"fwu", no_argument, 0, 'u'}, {"afi", no_argument, 0, 'a'}, {"fw", no_argument, 0, 'w'}, {0, 0, 0, 0} }; int c = getopt_long(argc, argv, "?dcfo:a1", long_options, NULL); if(c == -1) break; switch(c) { case -1: break; case 'c': enable_color(false); break; case 'd': g_debug = true; break; case 'f': g_force = true; break; case '?': usage(); break; case 'o': g_out_prefix = optarg; break; case 'a': try_afi = true; break; case 'u': try_fwu = true; break; case 'w': try_fw = true; break; default: abort(); } } if(argc - optind != 1) { usage(); return 1; } g_in_file = argv[optind]; FILE *fin = fopen(g_in_file, "r"); if(fin == NULL) { perror("Cannot open boot file"); return 1; } fseek(fin, 0, SEEK_END); long size = ftell(fin); fseek(fin, 0, SEEK_SET); void *buf = malloc(size); if(buf == NULL) { perror("Cannot allocate memory"); return 1; } if(fread(buf, size, 1, fin) != 1) { perror("Cannot read file"); return 1; } fclose(fin); int ret = -99; if(try_fwu || check_fwu(buf, size)) ret = do_fwu(buf, size); else if(try_afi || check_afi(buf, size)) ret = do_afi(buf, size); else if(try_fw || check_fw(buf, size)) ret = do_fw(buf, size); else { cprintf(GREY, "No valid format found\n"); ret = 1; } if(ret != 0) { cprintf(GREY, "Error: %d", ret); if(!g_force) cprintf(GREY, " (use --force to force processing)"); printf("\n"); ret = 2; } free(buf); color(OFF); return ret; }