usbloadergx/source/banner/openingbnr.c

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/****************************************************************************
* USB Loader GX Team
* openingbnr
*
* Extract opening.bnr/banner.bin/sound.bin/icon.bin
*
* Copyright 2008 Magicus <magicus@gmail.com>
* Licensed under the terms of the GNU GPL, version 2
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
* Version 1.0 Initial release
***************************************************************************/
#define _GNU_SOURCE
#include <ogcsys.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "libfat/fat.h"
#include "MD5.h"
#include "openingbnr.h"
#include "FileOperations/fileops.h"
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u16 be16(const u8 *p)
{
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return (p[0] << 8) | p[1];
}
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u32 be32(const u8 *p)
{
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return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
}
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u64 be64(const u8 *p)
{
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return ((u64) be32(p) << 32) | be32(p + 4);
}
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u64 be34(const u8 *p)
{
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return 4 * (u64) be32(p);
}
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void wbe16(u8 *p, u16 x)
{
p[0] = x >> 8;
p[1] = x;
}
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void wbe32(u8 *p, u32 x)
{
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wbe16(p, x >> 16);
wbe16(p + 2, x);
}
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void wbe64(u8 *p, u64 x)
{
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wbe32(p, x >> 32);
wbe32(p + 4, x);
}
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void md5(u8 *data, u32 len, u8 *hash)
{
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MD5(hash, data, len);
}
typedef struct
{
u8 zeroes[0x40];
u32 imet; // "IMET"
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u8 zero_six_zero_three[8]; // fixed, unknown purpose
u32 sizes[3];
u32 flag1;
u16 name_jp[0x2a]; // might be empty
u16 name_en[0x2a];
u16 name_de[0x2a];
u16 name_fr[0x2a];
u16 name_es[0x2a];
u16 name_it[0x2a];
u16 name_nl[0x2a];
u8 zeroes_2[0x348];
u8 crypto[0x10];
} imet_data_t;
typedef struct
{
u32 imd5_tag; // 0x494D4435 "IMD5";
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u32 size; // size of the rest of part B, starting from next field.
u8 zeroes[8];
u8 md5[16];
u32 payload_tag; // 0x4C5A3737 "LZ77" if this is lz77
u32 payload_data;
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} imd5_header_t;
typedef struct
{
u16 type;
u16 name_offset;
u32 data_offset; // == absolut offset fr<66>n U.8- headerns b<>rjan
u32 size; // last included file num for directories
} U8_node;
typedef struct
{
u32 tag; // 0x55AA382D "U.8-"
u32 rootnode_offset; // offset to root_node, always 0x20.
u32 header_size; // size of header from root_node to end of string table.
u32 data_offset; // offset to data -- this is rootnode_offset + header_size, aligned to 0x40.
u8 zeroes[16];
} U8_archive_header;
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static int write_file(void* data, size_t size, char* name)
{
size_t written = 0;
FILE *out;
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out = fopen(name, "wb");
if (out)
{
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written = fwrite(data, 1, size, out);
fclose(out);
}
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return (written == size) ? 1 : -1;
}
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u8* decompress_lz77(u8 *data, size_t data_size, size_t* decompressed_size)
{
u8 *data_end;
u8 *decompressed_data;
size_t unpacked_size;
u8 *in_ptr;
u8 *out_ptr;
u8 *out_end;
in_ptr = data;
data_end = data + data_size;
// Assume this for now and grow when needed
unpacked_size = data_size;
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decompressed_data = malloc(unpacked_size);
out_end = decompressed_data + unpacked_size;
out_ptr = decompressed_data;
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while (in_ptr < data_end)
{
int bit;
u8 bitmask = *in_ptr;
in_ptr++;
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for (bit = 0x80; bit != 0; bit >>= 1)
{
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if (bitmask & bit)
{
// Next section is compressed
u8 rep_length;
u16 rep_offset;
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rep_length = (*in_ptr >> 4) + 3;
rep_offset = *in_ptr & 0x0f;
in_ptr++;
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rep_offset = *in_ptr | (rep_offset << 8);
in_ptr++;
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if (out_ptr - decompressed_data < rep_offset)
{
return NULL;
}
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for (; rep_length > 0; rep_length--)
{
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*out_ptr = out_ptr[-rep_offset - 1];
out_ptr++;
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if (out_ptr >= out_end)
{
// Need to grow buffer
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decompressed_data = realloc(decompressed_data, unpacked_size * 2);
out_ptr = decompressed_data + unpacked_size;
unpacked_size *= 2;
out_end = decompressed_data + unpacked_size;
}
}
}
else
{
// Just copy byte
*out_ptr = *in_ptr;
out_ptr++;
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if (out_ptr >= out_end)
{
// Need to grow buffer
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decompressed_data = realloc(decompressed_data, unpacked_size * 2);
out_ptr = decompressed_data + unpacked_size;
unpacked_size *= 2;
out_end = decompressed_data + unpacked_size;
}
in_ptr++;
}
}
}
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*decompressed_size = (out_ptr - decompressed_data);
return decompressed_data;
}
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static int write_imd5_lz77(u8* data, size_t size, char* outname)
{
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imd5_header_t* header = (imd5_header_t*) data;
u32 tag;
u32 size_in_imd5;
u8 md5_calc[16];
u8 *decompressed_data;
size_t decompressed_size;
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tag = be32((u8*) &header->imd5_tag);
if (tag != 0x494D4435)
{
return -4;
}
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md5(data + 32, size - 32, md5_calc);
if (memcmp(&header->md5, md5_calc, 0x10))
{
return -5;
}
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size_in_imd5 = be32((u8*) &header->size);
if (size_in_imd5 != size - 32)
{
return -6;
}
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tag = be32((u8*) &header->payload_tag);
if (tag == 0x4C5A3737)
{
// "LZ77" - uncompress
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decompressed_data = decompress_lz77(data + sizeof(imd5_header_t), size - sizeof(imd5_header_t),
&decompressed_size);
if (decompressed_data == NULL) return -7;
write_file(decompressed_data, decompressed_size, outname);
//printf(", uncompressed %d bytes, md5 ok", decompressed_size);
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free(decompressed_data);
}
else
{
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write_file(&header->payload_tag, size - 32, outname);
//printf(", md5 ok");
}
return 0;
}
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static int do_U8_archive(FILE *fp)
{
U8_archive_header header;
U8_node root_node;
u32 tag;
u32 num_nodes;
U8_node* nodes;
u8* string_table;
size_t rest_size;
unsigned int i;
u32 data_offset;
u32 current_offset;
u16 dir_stack[16];
int dir_index = 0;
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fread(&header, 1, sizeof header, fp);
tag = be32((u8*) &header.tag);
if (tag != 0x55AA382D)
{
return -1;
}
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fread(&root_node, 1, sizeof(root_node), fp);
num_nodes = be32((u8*) &root_node.size) - 1;
//printf("Number of files: %d\n", num_nodes);
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nodes = malloc(sizeof(U8_node) * (num_nodes));
fread(nodes, 1, num_nodes * sizeof(U8_node), fp);
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data_offset = be32((u8*) &header.data_offset);
rest_size = data_offset - sizeof(header) - (num_nodes + 1) * sizeof(U8_node);
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string_table = malloc(rest_size);
fread(string_table, 1, rest_size, fp);
current_offset = data_offset;
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for (i = 0; i < num_nodes; i++)
{
U8_node* node = &nodes[i];
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u16 type = be16((u8*) &node->type);
u16 name_offset = be16((u8*) &node->name_offset);
u32 my_data_offset = be32((u8*) &node->data_offset);
u32 size = be32((u8*) &node->size);
char* name = (char*) &string_table[name_offset];
u8* file_data;
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if (type == 0x0100)
{
// Directory
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mkdir(name, 0777);
chdir(name);
dir_stack[++dir_index] = size;
//printf("%*s%s/\n", dir_index, "", name);
}
else
{
// Normal file
u8 padding[32];
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if (type != 0x0000)
{
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free(string_table);
return -2;
}
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if (current_offset < my_data_offset)
{
int diff = my_data_offset - current_offset;
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if (diff > 32)
{
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free(string_table);
return -3;
}
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fread(padding, 1, diff, fp);
current_offset += diff;
}
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file_data = malloc(size);
fread(file_data, 1, size, fp);
//printf("%*s %s (%d bytes", dir_index, "", name, size);
int result;
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result = write_imd5_lz77(file_data, size, name);
if (result < 0)
{
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free(string_table);
return result;
}
//printf(")\n");
current_offset += size;
}
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while (dir_stack[dir_index] == i + 2 && dir_index > 0)
{
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chdir("..");
dir_index--;
}
}
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free(string_table);
return 0;
}
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static void do_imet_header(FILE *fp)
{
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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void do_U8_archivebanner(FILE *fp)
{
U8_archive_header header;
U8_node root_node;
u32 tag;
u32 num_nodes;
U8_node* nodes;
u8* string_table;
size_t rest_size;
unsigned int i;
u32 data_offset;
u16 dir_stack[16];
int dir_index = 0;
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fread(&header, 1, sizeof header, fp);
tag = be32((u8*) &header.tag);
if (tag != 0x55AA382D)
{
//printf("No U8 tag");
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exit(0);
}
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fread(&root_node, 1, sizeof(root_node), fp);
num_nodes = be32((u8*) &root_node.size) - 1;
printf("Number of files: %d\n", num_nodes);
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nodes = malloc(sizeof(U8_node) * (num_nodes));
fread(nodes, 1, num_nodes * sizeof(U8_node), fp);
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data_offset = be32((u8*) &header.data_offset);
rest_size = data_offset - sizeof(header) - (num_nodes + 1) * sizeof(U8_node);
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string_table = malloc(rest_size);
fread(string_table, 1, rest_size, fp);
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for (i = 0; i < num_nodes; i++)
{
U8_node* node = &nodes[i];
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u16 type = be16((u8*) &node->type);
u16 name_offset = be16((u8*) &node->name_offset);
u32 my_data_offset = be32((u8*) &node->data_offset);
u32 size = be32((u8*) &node->size);
char* name = (char*) &string_table[name_offset];
u8* file_data;
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if (type == 0x0100)
{
// Directory
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mkdir(name, 0777);
chdir(name);
dir_stack[++dir_index] = size;
//printf("%*s%s/\n", dir_index, "", name);
}
else
{
// Normal file
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if (type != 0x0000)
{
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printf("Unknown type");
exit(0);
}
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fseek(fp, my_data_offset, SEEK_SET);
file_data = malloc(size);
fread(file_data, 1, size, fp);
write_file(file_data, size, name);
free(file_data);
//printf("%*s %s (%d bytes)\n", dir_index, "", name, size);
}
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while (dir_stack[dir_index] == i + 2 && dir_index > 0)
{
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chdir("..");
dir_index--;
}
}
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free(string_table);
}
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int extractbnrfile(const char * filepath, const char * destpath)
{
int ret = -1;
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FILE *fp = fopen(filepath, "rb");
if (fp)
{
CreateSubfolder(destpath);
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chdir(destpath);
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do_imet_header(fp);
ret = do_U8_archive(fp);
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fclose(fp);
}
return ret;
}
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int unpackBin(const char * filename, const char * outdir)
{
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FILE *fp = fopen(filename, "rb");
;
if (fp)
{
CreateSubfolder(outdir);
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chdir(outdir);
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do_U8_archivebanner(fp);
fclose(fp);
return 1;
}
return 0;
}
#if 0
#define TMP_PATH(s) "BANNER:/dump"s
//#define TMP_PATH(s) "SD:/dump"s
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int unpackBanner(const u8 *gameid, int what, const char *outdir)
{
char path[256];
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if (!ramdiskMount("BANNER", NULL)) return -1;
CreateSubfolder(TMP_PATH( "/" ));
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s32 ret = dump_banner(gameid, TMP_PATH( "/opening.bnr" ));
if (ret != 1)
{
ret = -1;
goto error2;
}
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ret = extractbnrfile(TMP_PATH( "/opening.bnr" ), TMP_PATH( "/" ));
if (ret != 0)
{
ret = -1;
goto error2;
}
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if (what & UNPACK_BANNER_BIN)
{
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snprintf(path, sizeof(path), "%sbanner/", outdir);
ret = unpackBin(TMP_PATH( "/meta/banner.bin" ), path);
if (ret != 1)
{
ret = -1;
goto error2;
}
}
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if (what & UNPACK_ICON_BIN)
{
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snprintf(path, sizeof(path), "%sicon/", outdir);
ret = unpackBin(TMP_PATH( "/meta/icon.bin" ), path);
if (ret != 1)
{
ret = -1;
goto error2;
}
}
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if (what & UNPACK_SOUND_BIN)
{
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snprintf(path, sizeof(path), "%ssound.bin", outdir);
FILE *fp = fopen(TMP_PATH( "/meta/sound.bin" ), "rb");
if (fp)
{
size_t size;
u8 *data;
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fseek(fp, 0, SEEK_END);
size = ftell(fp);
if (!size)
{
ret = -1;
goto error;
}
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fseek(fp, 0, SEEK_SET);
data = (u8 *) malloc(size);
if (!data)
{
ret = -1;
goto error;
}
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if (fread(data, 1, size, fp) != size)
{
ret = -1;
goto error;
}
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ret = write_file(data, size, path);
}
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error: fclose(fp);
}
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ramdiskUnmount("BANNER");
error2: if (ret < 0) return ret;
return 1;
}
#endif