mirror of
https://github.com/wiidev/usbloadergx.git
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460 lines
11 KiB
C
460 lines
11 KiB
C
/****************************************************************************
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* USB Loader GX Team
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* openingbnr
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*
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* Extract opening.bnr/banner.bin/sound.bin/icon.bin
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*
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* Copyright 2008 Magicus <magicus@gmail.com>
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* Licensed under the terms of the GNU GPL, version 2
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
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* Version 1.0 Initial release
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***************************************************************************/
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#define _GNU_SOURCE
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#include <ogcsys.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <fat.h>
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#include "MD5.h"
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#include "banner.h"
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u16 be16(const u8 *p)
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{
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return (p[0] << 8) | p[1];
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}
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u32 be32(const u8 *p)
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{
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return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
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}
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u64 be64(const u8 *p)
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{
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return ((u64)be32(p) << 32) | be32(p + 4);
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}
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u64 be34(const u8 *p)
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{
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return 4 * (u64)be32(p);
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}
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void wbe16(u8 *p, u16 x)
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{
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p[0] = x >> 8;
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p[1] = x;
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}
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void wbe32(u8 *p, u32 x)
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{
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wbe16(p, x >> 16);
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wbe16(p + 2, x);
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}
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void wbe64(u8 *p, u64 x)
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{
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wbe32(p, x >> 32);
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wbe32(p + 4, x);
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}
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void md5(u8 *data, u32 len, u8 *hash)
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{
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MD5(hash, data, len);
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}
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static FILE *fp;
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typedef struct {
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u8 zeroes[0x40];
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u32 imet; // "IMET"
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u8 zero_six_zero_three[8]; // fixed, unknown purpose
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u32 sizes[3];
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u32 flag1;
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u16 name_jp[0x2a]; // might be empty
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u16 name_en[0x2a];
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u16 name_de[0x2a];
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u16 name_fr[0x2a];
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u16 name_es[0x2a];
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u16 name_it[0x2a];
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u16 name_nl[0x2a];
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u8 zeroes_2[0x348];
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u8 crypto[0x10];
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} imet_data_t;
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typedef struct {
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u32 imd5_tag; // 0x494D4435 "IMD5";
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u32 size; // size of the rest of part B, starting from next field.
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u8 zeroes[8];
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u8 md5[16];
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u32 payload_tag; // 0x4C5A3737 "LZ77" if this is lz77
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u32 payload_data;
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} imd5_header_t;
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typedef struct
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{
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u16 type;
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u16 name_offset;
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u32 data_offset; // == absolut offset fr<66>n U.8- headerns b<>rjan
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u32 size; // last included file num for directories
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} U8_node;
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typedef struct
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{
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u32 tag; // 0x55AA382D "U.8-"
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u32 rootnode_offset; // offset to root_node, always 0x20.
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u32 header_size; // size of header from root_node to end of string table.
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u32 data_offset; // offset to data -- this is rootnode_offset + header_size, aligned to 0x40.
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u8 zeroes[16];
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} U8_archive_header;
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static void write_file(void* data, size_t size, char* name)
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{
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FILE *out;
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out = fopen(name, "wb");
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fwrite(data, 1, size, out);
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fclose(out);
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}
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u8* decompress_lz77(u8 *data, size_t data_size, size_t* decompressed_size)
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{
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u8 *data_end;
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u8 *decompressed_data;
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size_t unpacked_size;
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u8 *in_ptr;
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u8 *out_ptr;
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u8 *out_end;
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in_ptr = data;
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data_end = data + data_size;
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// Assume this for now and grow when needed
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unpacked_size = data_size;
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decompressed_data = malloc(unpacked_size);
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out_end = decompressed_data + unpacked_size;
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out_ptr = decompressed_data;
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while (in_ptr < data_end) {
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int bit;
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u8 bitmask = *in_ptr;
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in_ptr++;
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for (bit = 0x80; bit != 0; bit >>= 1) {
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if (bitmask & bit) {
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// Next section is compressed
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u8 rep_length;
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u16 rep_offset;
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rep_length = (*in_ptr >> 4) + 3;
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rep_offset = *in_ptr & 0x0f;
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in_ptr++;
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rep_offset = *in_ptr | (rep_offset << 8);
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in_ptr++;
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if (out_ptr-decompressed_data < rep_offset) {
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return NULL;
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}
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for ( ; rep_length > 0; rep_length--) {
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*out_ptr = out_ptr[-rep_offset-1];
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out_ptr++;
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if (out_ptr >= out_end) {
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// Need to grow buffer
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decompressed_data = realloc(decompressed_data, unpacked_size*2);
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out_ptr = decompressed_data + unpacked_size;
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unpacked_size *= 2;
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out_end = decompressed_data + unpacked_size;
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}
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}
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} else {
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// Just copy byte
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*out_ptr = *in_ptr;
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out_ptr++;
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if (out_ptr >= out_end) {
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// Need to grow buffer
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decompressed_data = realloc(decompressed_data, unpacked_size*2);
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out_ptr = decompressed_data + unpacked_size;
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unpacked_size *= 2;
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out_end = decompressed_data + unpacked_size;
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}
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in_ptr++;
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}
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}
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}
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*decompressed_size = (out_ptr - decompressed_data);
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return decompressed_data;
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}
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static int write_imd5_lz77(u8* data, size_t size, char* outname)
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{
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imd5_header_t* header = (imd5_header_t*) data;
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u32 tag;
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u32 size_in_imd5;
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u8 md5_calc[16];
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u8 *decompressed_data;
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size_t decompressed_size;
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tag = be32((u8*) &header->imd5_tag);
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if (tag != 0x494D4435) {
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return -4;
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}
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md5(data+32, size-32, md5_calc);
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if (memcmp(&header->md5, md5_calc, 0x10)) {
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return -5;
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}
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size_in_imd5 = be32((u8*) &header->size);
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if (size_in_imd5 != size - 32) {
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return -6;
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}
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tag = be32((u8*) &header->payload_tag);
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if (tag == 0x4C5A3737) {
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// "LZ77" - uncompress
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decompressed_data = decompress_lz77(data + sizeof(imd5_header_t), size - sizeof(imd5_header_t), &decompressed_size);
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if(decompressed_data == NULL)
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return -7;
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write_file(decompressed_data, decompressed_size, outname);
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//printf(", uncompressed %d bytes, md5 ok", decompressed_size);
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free(decompressed_data);
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} else {
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write_file(&header->payload_tag, size-32, outname);
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//printf(", md5 ok");
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}
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return 0;
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}
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static int do_U8_archive(void)
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{
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U8_archive_header header;
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U8_node root_node;
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u32 tag;
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u32 num_nodes;
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U8_node* nodes;
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u8* string_table;
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size_t rest_size;
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unsigned int i;
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u32 data_offset;
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u32 current_offset;
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u16 dir_stack[16];
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int dir_index = 0;
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fread(&header, 1, sizeof header, fp);
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tag = be32((u8*) &header.tag);
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if (tag != 0x55AA382D) {
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return -1;
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}
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fread(&root_node, 1, sizeof(root_node), fp);
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num_nodes = be32((u8*) &root_node.size) - 1;
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//printf("Number of files: %d\n", num_nodes);
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nodes = malloc(sizeof(U8_node) * (num_nodes));
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fread(nodes, 1, num_nodes * sizeof(U8_node), fp);
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data_offset = be32((u8*) &header.data_offset);
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rest_size = data_offset - sizeof(header) - (num_nodes+1)*sizeof(U8_node);
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string_table = malloc(rest_size);
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fread(string_table, 1, rest_size, fp);
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current_offset = data_offset;
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for (i = 0; i < num_nodes; i++) {
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U8_node* node = &nodes[i];
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u16 type = be16((u8*)&node->type);
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u16 name_offset = be16((u8*)&node->name_offset);
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u32 my_data_offset = be32((u8*)&node->data_offset);
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u32 size = be32((u8*)&node->size);
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char* name = (char*) &string_table[name_offset];
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u8* file_data;
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if (type == 0x0100) {
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// Directory
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mkdir(name, 0777);
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chdir(name);
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dir_stack[++dir_index] = size;
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//printf("%*s%s/\n", dir_index, "", name);
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} else {
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// Normal file
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u8 padding[32];
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if (type != 0x0000) {
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return -2;
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}
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if (current_offset < my_data_offset) {
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int diff = my_data_offset - current_offset;
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if (diff > 32) {
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return -3;
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}
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fread(padding, 1, diff, fp);
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current_offset += diff;
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}
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file_data = malloc(size);
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fread(file_data, 1, size, fp);
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//printf("%*s %s (%d bytes", dir_index, "", name, size);
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int result;
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result = write_imd5_lz77(file_data, size, name);
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if(result < 0)
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return result;
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//printf(")\n");
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current_offset += size;
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}
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while (dir_stack[dir_index] == i+2 && dir_index > 0) {
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chdir("..");
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dir_index--;
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}
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}
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return 0;
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}
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static void do_imet_header(void)
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{
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imet_data_t header;
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fread(&header, 1, sizeof header, fp);
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write_file(&header, sizeof(header), "header.imet");
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}
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void do_U8_archivebanner(FILE *fp)
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{
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U8_archive_header header;
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U8_node root_node;
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u32 tag;
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u32 num_nodes;
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U8_node* nodes;
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u8* string_table;
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size_t rest_size;
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unsigned int i;
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u32 data_offset;
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u16 dir_stack[16];
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int dir_index = 0;
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fread(&header, 1, sizeof header, fp);
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tag = be32((u8*) &header.tag);
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if (tag != 0x55AA382D) {
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//printf("No U8 tag");
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exit(0);
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}
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fread(&root_node, 1, sizeof(root_node), fp);
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num_nodes = be32((u8*) &root_node.size) - 1;
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printf("Number of files: %d\n", num_nodes);
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nodes = malloc(sizeof(U8_node) * (num_nodes));
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fread(nodes, 1, num_nodes * sizeof(U8_node), fp);
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data_offset = be32((u8*) &header.data_offset);
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rest_size = data_offset - sizeof(header) - (num_nodes+1)*sizeof(U8_node);
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string_table = malloc(rest_size);
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fread(string_table, 1, rest_size, fp);
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for (i = 0; i < num_nodes; i++) {
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U8_node* node = &nodes[i];
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u16 type = be16((u8*)&node->type);
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u16 name_offset = be16((u8*)&node->name_offset);
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u32 my_data_offset = be32((u8*)&node->data_offset);
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u32 size = be32((u8*)&node->size);
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char* name = (char*) &string_table[name_offset];
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u8* file_data;
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if (type == 0x0100) {
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// Directory
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mkdir(name, 0777);
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chdir(name);
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dir_stack[++dir_index] = size;
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//printf("%*s%s/\n", dir_index, "", name);
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} else {
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// Normal file
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if (type != 0x0000) {
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printf("Unknown type");
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exit(0);
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}
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fseek(fp, my_data_offset, SEEK_SET);
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file_data = malloc(size);
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fread(file_data, 1, size, fp);
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write_file(file_data, size, name);
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free(file_data);
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//printf("%*s %s (%d bytes)\n", dir_index, "", name, size);
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}
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while (dir_stack[dir_index] == i+2 && dir_index > 0) {
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chdir("..");
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dir_index--;
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}
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}
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}
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int extractbnrfile(const char * filepath, const char * destpath)
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{
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int ret;
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fp = fopen(filepath, "rb");
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mkdir(destpath, 0777);
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chdir(destpath);
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do_imet_header();
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ret = do_U8_archive();
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fclose(fp);
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return ret;
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}
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int unpackBin(const char * filename,const char * outdir)
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{
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FILE *fp;
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fp = fopen(filename,"rb");
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if(fp!=NULL)
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{
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mkdir(outdir, 0777);
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chdir(outdir);
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do_U8_archivebanner(fp);
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fclose(fp);
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return 1;
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}
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return 0;
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}
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int unpackBanner(char * gameid, char * outdir)
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{
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s32 ret = dump_banner(gameid,"SD:/opening.bnr");
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if (ret != 1) return -1;
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ret = extractbnrfile("SD:/opening.bnr","SD:/neu");
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if (ret != 0) return -1;
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remove("SD:/opening.bnr");
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char iconpath[60];
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snprintf(iconpath,sizeof(iconpath),"%s/meta/icon.bin",outdir);
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ret = unpackBin(iconpath,"SD:/icon");
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if (ret != 1) return -1;
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if (unlink("/neu/meta/banner.bin") == -1) return -1;
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if (unlink("/neu/meta/icon.bin") == -1) return -1;
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if (unlink("/neu/meta/sound.bin") == -1) return -1;
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if (unlink("/neu/header.imet") == -1) return -1;
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if (unlink("/neu/meta") == -1) return -1;
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if (unlink("/neu") == -1) return -1;
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return 1;
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}
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