Difference between revisions of "User:Magicus/Magicus's Tools/Parse-channel.c"

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(Replace with the right file (it's late! :)), and add some instructions)
Line 1: Line 1:
 +
'''Put this file in the same directory as a compiled version of [[Segher's Wii.git]] tools, since it depends on them.'''
 +
 +
: Sorry for the beta status, it's 2 am and I need to get some sleep ;-) but I thought it was better I released what I've done so far. Feel free to improve it. [[User:Magicus|Magicus]] 17:00, 1 March 2008 (PST)
 +
 
<pre>
 
<pre>
// parse-channel.c
+
// parse-u8.c
 
// Compile with:
 
// Compile with:
// gcc -g -DLARGE_FILES -D_FILE_OFFSET_BITS=64 -Wall -W -O2  -c -o parse-channel.o parse-channel.c
+
// gcc -g -DLARGE_FILES -D_FILE_OFFSET_BITS=64 -Wall -W -O2  -c -o parse-u8.o parse-u8.c
// gcc -g -lcrypto  parse-channel.o tools.o bn.o ec.o  -o parse-channel
+
// gcc -g -lcrypto  parse-u8.o tools.o bn.o ec.o  -o parse-u8
 
// The other files are from segher's git repository, created by his Makefile.
 
// The other files are from segher's git repository, created by his Makefile.
  
 
// Copyright 2008 Magicus <magicus@gmail.com>
 
// Copyright 2008 Magicus <magicus@gmail.com>
// This file is based on tachtig.c, which is
 
// Copyright 2007,2008  Segher Boessenkool  <segher@kernel.crashing.org>
 
//
 
 
// Licensed under the terms of the GNU GPL, version 2
 
// Licensed under the terms of the GNU GPL, version 2
 
// http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
 
// http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
  
// Version 1.0 Initial release
+
// Version 0.5 Beta version, just lists contents, doesn't yet extract files.
// Version 1.1 Fixing IV-bug for part B. Adding support for decompressing part B;
 
// thanks Arcnor <arcnorj@yahoo.com> for the basic LZ77 code!
 
  
  
 +
#include <sys/stat.h>
 +
#include <sys/types.h>
 +
     
 
#include <string.h>
 
#include <string.h>
 
#include <stdlib.h>
 
#include <stdlib.h>
 
#include <stdio.h>
 
#include <stdio.h>
 +
#include <unistd.h>
  
 
#include "tools.h"
 
#include "tools.h"
Line 31: Line 34:
 
return  (p[0] << 8) | p[1];
 
return  (p[0] << 8) | p[1];
 
}
 
}
 
static u8 sd_key[16];
 
static u8 sd_iv[16];
 
static u8 md5_blanker[16];
 
  
 
static FILE *fp;
 
static FILE *fp;
  
static char gamename[5];
+
static char *outdir = "OUTDIR";
  
static size_t partB_size;
+
typedef struct
static u16 num_contents;
+
{
static size_t* content_sizes;
+
  u16 type;
 +
  u16 name_offset;
 +
  u32 data_offset; // == absolut offset från U.8- headerns början
 +
  u32 size; // last included file num for directories
 +
} U8_node;
  
typedef struct {
+
typedef struct
      u32 title_id_01_code;
+
{
      u32 title_id_02_name;
+
  u32 tag; // 0x55AA382D "U.8-"
      u32 partB_size;
+
  u32 rootnode_offset; // offset to root_node, always 0x20.
      u8  md5[0x10];
+
  u32 header_size; // size of header from root_node to end of string table.
      u8  data[0x624];
+
  u32 data_offset; // offset to data -- this is rootnode_offset + header_size, aligned to 0x40.
} partA_header_t;
+
   u8 zeroes[16];
 
+
} U8_archive_header;
typedef struct {
 
      u32 imd5_tag; // 0x494D4435 "IMD5";
 
      u32 size; // size of the rest of part B, starting from next field.
 
      u8 zeroes[8];
 
      u8 crypto[16];
 
      u32 lz77_tag; // 0x4C5A3737 "LZ77"
 
      u32 unknown; // padding to 0x40?
 
}  partB_header_t;
 
 
 
typedef struct {
 
      u32 sig_type;
 
      u8 sig[256];
 
      u8 fill1[60];
 
      u8 issuer[64]; // Root-CA%08x-CP%08x
 
      u8 version;
 
      u8 ca_crl_version;
 
      u8 signer_crl_version;
 
      u8 fill2;
 
      u64 sys_version;
 
      u64 title_id;
 
      u32 title_type;
 
      u16 group_id; // publisher
 
      u8 reserved[62];
 
      u32 access_rights;
 
      u16 title_version;
 
      u16 num_contents;
 
      u16 boot_index;
 
      u16 fill3;
 
} tmd_t;
 
 
 
typedef struct {
 
  u32 cid; // content id
 
  u16 index; // # number of the file
 
  u16  type;
 
  u64 size;
 
   u8 hash [20]; //  SHA1 hash content
 
} content_record_t;
 
  
 +
/*
 
static void write_part(void* data, size_t size, char* name)
 
static void write_part(void* data, size_t size, char* name)
 
{
 
{
Line 96: Line 63:
  
 
   snprintf(filename, sizeof(filename), "%s_%s.bin", gamename, name);
 
   snprintf(filename, sizeof(filename), "%s_%s.bin", gamename, name);
   filename[128] = '\0';
+
   filename[127] = '\0';
 
out = fopen(filename, "wb");
 
out = fopen(filename, "wb");
 
fwrite(data, 1, size, out);
 
fwrite(data, 1, size, out);
 
fclose(out);
 
fclose(out);
 
}
 
}
 +
*/
  
static void do_partA_header(void)
 
{
 
  partA_header_t header;
 
u8 partA_iv[16];
 
u8 md5_file[16];
 
u8 md5_calc[16];
 
  
fread(&header, 1, sizeof header, fp);
+
static void do_U8_archive(void)
 
 
  // Use a private copy of the sd_iv since we need it again
 
  // and it will be overwritten otherwise.
 
memcpy(partA_iv, sd_iv, 16);
 
aes_cbc_dec(sd_key, partA_iv, (u8*) &header, sizeof header, (u8*) &header);
 
 
 
memcpy(md5_file, header.md5, 16);
 
memcpy(header.md5, md5_blanker, 16);
 
md5((u8*) &header, sizeof header, md5_calc);
 
 
 
if (memcmp(md5_file, md5_calc, 0x10)) {
 
ERROR("MD5 mismatch");
 
  }
 
 
 
// Get the four-letter code of the game, for file naming purposes.
 
strncpy(gamename, (char*) &header.title_id_02_name, 4);
 
gamename[5] = '\0';
 
printf("Game code is: %s\n", gamename);
 
 
 
  partB_size = be32((u8*) &header.partB_size);
 
 
 
  write_part(&header, sizeof(header), "01_header");
 
}
 
 
 
static u8* decompress_lz77(u8 *data, size_t data_size, size_t* decompressed_size)
 
 
{
 
{
u8 *data_end;
+
  U8_archive_header header;
u8 *decompressed_data;
+
  U8_node root_node;
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;
 
 
 
decompressed_data = malloc(unpacked_size);
 
out_end = decompressed_data + unpacked_size;
 
 
out_ptr = decompressed_data;
 
 
while (in_ptr < data_end) {
 
  int bit;
 
  u8 bitmask = *in_ptr;
 
 
 
  in_ptr++;
 
  for (bit = 0x80; bit != 0; bit >>= 1) {
 
    if (bitmask & bit) {
 
      // Next section is compressed
 
      u8 rep_length;
 
      u16 rep_offset;
 
     
 
      rep_length = (*in_ptr >> 4) + 3;
 
      rep_offset = *in_ptr & 0x0f;
 
      in_ptr++;
 
      rep_offset = *in_ptr | (rep_offset << 8);
 
      in_ptr++;
 
      if (out_ptr-decompressed_data < rep_offset) {
 
        ERROR("Inconsistency in LZ77 encoding");
 
      }
 
 
 
        for ( ; rep_length > 0; rep_length--) {
 
          *out_ptr = out_ptr[-rep_offset-1];
 
          out_ptr++;
 
          if (out_ptr >= out_end) {
 
            // Need to grow buffer
 
            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++;
 
        if (out_ptr >= out_end) {
 
          // Need to grow buffer
 
          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++;
 
    }
 
  }
 
}
 
 
 
*decompressed_size = (out_ptr - decompressed_data);
 
return decompressed_data;
 
}
 
 
 
static void do_partB_gameinfo(void)
 
{
 
u8 *data;
 
u8 *decompressed_data;
 
size_t rounded_size;
 
size_t decompressed_size;
 
partB_header_t* header;
 
 
u32 tag;
 
u32 tag;
u32 unknown;
+
u32 num_nodes;
u32 size;
+
U8_node* nodes;
 +
u8* string_table;
 +
size_t rest_size;
 +
unsigned int i;
 +
u32 data_offset;
  
rounded_size = (partB_size + 63) & ~63;
+
fread(&header, 1, sizeof header, fp);
 
+
tag = be32((u8*) &header.tag);
data = malloc(rounded_size);
+
if (tag != 0x55AA382D) {
fread(data, 1, rounded_size, fp);
+
  ERROR("No U8 tag");
 
 
aes_cbc_dec(sd_key, sd_iv, data, rounded_size, data);
 
 
header = (partB_header_t*) data;
 
 
tag = be32((u8*) &header->imd5_tag);
 
if (tag != 0x494D4435) {
 
  ERROR("No IMD5 tag");
 
}
 
size = be32((u8*) &header->size);
 
if (size != partB_size - 32) {
 
  ERROR("Size mismatch");
 
 
}
 
}
  
tag = be32((u8*) &header->lz77_tag);
+
fread(&root_node, 1, sizeof(root_node), fp);
if (tag != 0x4C5A3737) {
+
num_nodes = be32((u8*) &root_node.size) - 1;
  ERROR("No LZ77 tag");
+
printf("Number of files: %d\n", num_nodes);
}
 
 
 
unknown = be32((u8*) &header->unknown);
 
printf("Part B unknown field: %x\n", unknown);
 
 
 
write_part(data, sizeof(partB_header_t), "02a_banner_header");
 
 
 
decompressed_data = decompress_lz77(data + sizeof(partB_header_t), partB_size - sizeof(partB_header_t), &decompressed_size);
 
write_part(decompressed_data, decompressed_size, "02b_banner_decompressed");
 
 
 
free(data);
 
//  free(decompressed_data);
 
}
 
 
 
static void do_partC_Bk_header(void)
 
{
 
u8 header[0x80];
 
 
 
fread(header, 1, sizeof header, fp);
 
 
 
if (be32(header + 4) != 0x426b0001)
 
ERROR("no Bk header");
 
if (be32(header) != 0x70)
 
ERROR("wrong Bk header size");
 
 
 
fprintf(stderr, "NG id: %08x\n", be32(header + 8));
 
 
 
write_part(header, sizeof(header), "03_bk_header");
 
}
 
 
 
static void do_partD_tmd(void)
 
{
 
tmd_t tmd;
 
u8* data;
 
size_t tmd_size;
 
int i;
 
content_record_t* rec;
 
 
 
fread(&tmd, 1, sizeof tmd, fp);
 
 
 
  num_contents = be16((u8*) &tmd.num_contents);
 
  printf("Number of content files: %d\n", num_contents);
 
 
 
  // Now we can read the rest of the tmd.
 
  tmd_size = sizeof(tmd) + num_contents*sizeof(content_record_t);
 
  tmd_size = (tmd_size + 63) & ~63;
 
 
 
  data = malloc(tmd_size);
 
  memcpy(data, &tmd, sizeof(tmd));
 
  fread(&data[sizeof(tmd)], 1, tmd_size-sizeof(tmd), fp);
 
 
 
  write_part(data, tmd_size, "04_tmd");
 
 
 
  content_sizes = calloc(1, sizeof (size_t) *  num_contents);
 
 
 
  rec = (content_record_t*) &data[sizeof(tmd)];
 
  for (i = 0; i < num_contents; i++, rec++) {
 
    u16 type = be16((u8*) &rec->type);
 
 
 
    if (!(type & 0x8000)) {
 
      content_sizes[i] = (size_t)be64((u8*) &rec->size);
 
    }
 
  }
 
}
 
 
 
static void do_partE_contents(void)
 
{
 
  int i;
 
 
 
  for (i=0; i < num_contents; i++) {
+
nodes = malloc(sizeof(U8_node) * (num_nodes));
  if (content_sizes[i] != 0) {
+
fread(nodes, 1, num_nodes * sizeof(U8_node), fp);
      char name[128];
 
      u8 *data;
 
      size_t rounded_size = (content_sizes[i] + 63) & ~63;
 
     
 
      data = malloc(rounded_size);
 
      fread(data, 1, rounded_size, fp);
 
 
 
      snprintf(name, 128, "05_content_%02d", i);
+
data_offset = be32((u8*) &header.data_offset);
      printf("Writing included content index %d of size: %x\n", i, content_sizes[i]);
+
rest_size = data_offset - sizeof(header) - num_nodes*sizeof(U8_node);
     
 
      write_part(data, rounded_size, name);
 
  
      free (data);
+
string_table = malloc(rest_size);
 +
fread(string_table, 1, rest_size, fp);
 +
 
 +
for (i = 0; i < num_nodes; i++) {
 +
    U8_node* node = &nodes[i]; 
 +
    u16 type = be16((u8*)&node->type);
 +
    u16 name_offset = be16((u8*)&node->name_offset);
 +
    u32 data_offset = be32((u8*)&node->data_offset);
 +
    u32 size = be32((u8*)&node->size);
 +
    char* name = (char*) &string_table[name_offset];
 +
    char* premarker;
 +
    char* postmarker;
 +
   
 +
    if (type == 0x0100) {
 +
      premarker = "";
 +
      postmarker = "/";
 +
    } else {
 +
      premarker = " ";
 +
      postmarker = "";
 
     }
 
     }
 +
   
 +
    printf("%s%s%s (%d) offset: %x\n", premarker, name, postmarker, size, data_offset);
 
   }
 
   }
 
}
 
}
 
static void do_partF_cert(void)
 
{
 
u8 cert[0x340];
 
 
fread(cert, 1, sizeof cert, fp);
 
 
  write_part(cert, sizeof(cert), "06_cert");
 
}
 
 
  
 
int main(int argc, char **argv)
 
int main(int argc, char **argv)
 
{
 
{
   if (argc != 2) {
+
   if (argc == 3) {
     ERROR("Usage: parse-channel <file>");
+
    outdir = argv[2];
 +
  } else if (argc != 2) {
 +
     ERROR("Usage: parse-u8 <file> [<outdir>]");
 
   }
 
   }
 
get_key("sd-key", sd_key, 16);
 
get_key("sd-iv", sd_iv, 16);
 
get_key("md5-blanker", md5_blanker, 16);
 
  
 
fp = fopen(argv[1], "rb");
 
fp = fopen(argv[1], "rb");
  
  do_partA_header();
+
//  mkdir(outdir, 0777);
do_partB_gameinfo();
+
//  chdir(outdir);
do_partC_Bk_header();
+
 
do_partD_tmd();
+
  do_U8_archive();
do_partE_contents();
 
do_partF_cert();
 
  
 
fclose(fp);
 
fclose(fp);

Revision as of 02:00, 2 March 2008

Put this file in the same directory as a compiled version of Segher's Wii.git tools, since it depends on them.

Sorry for the beta status, it's 2 am and I need to get some sleep ;-) but I thought it was better I released what I've done so far. Feel free to improve it. Magicus 17:00, 1 March 2008 (PST)
// parse-u8.c
// Compile with:
// gcc -g -DLARGE_FILES -D_FILE_OFFSET_BITS=64 -Wall -W -O2   -c -o parse-u8.o parse-u8.c
// gcc -g -lcrypto  parse-u8.o tools.o bn.o ec.o   -o parse-u8
// The other files are from segher's git repository, created by his Makefile.

// 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 0.5 Beta version, just lists contents, doesn't yet extract files.


#include <sys/stat.h>
#include <sys/types.h>
       
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>

#include "tools.h"

#define ERROR(s) do { fprintf(stderr, s "\n"); exit(1); } while (0)

// FIXME: this should really move to tools.c
u16 be16(u8 *p)
{
	return  (p[0] << 8) | p[1];
}

static FILE *fp;

static char *outdir = "OUTDIR";

typedef struct 
{
  u16 type;
  u16 name_offset;
  u32 data_offset; // == absolut offset från U.8- headerns början
  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;

/*
static void write_part(void* data, size_t size, char* name)
{
	FILE *out;
	char filename[128];

  snprintf(filename, sizeof(filename), "%s_%s.bin", gamename, name);
  filename[127] = '\0';
	out = fopen(filename, "wb");
	fwrite(data, 1, size, out);
	fclose(out);	
}
*/


static void do_U8_archive(void)
{
  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;

	fread(&header, 1, sizeof header, fp);
	tag = be32((u8*) &header.tag);
	if (tag != 0x55AA382D) {
	  ERROR("No U8 tag");
	}

	fread(&root_node, 1, sizeof(root_node), fp);
	num_nodes = be32((u8*) &root_node.size) - 1;
	printf("Number of files: %d\n", num_nodes);
	
	nodes = malloc(sizeof(U8_node) * (num_nodes));
	fread(nodes, 1, num_nodes * sizeof(U8_node), fp);
	
	data_offset = be32((u8*) &header.data_offset);
	rest_size = data_offset - sizeof(header) - num_nodes*sizeof(U8_node);

	string_table = malloc(rest_size);
	fread(string_table, 1, rest_size, fp);
   
	for (i = 0; i < num_nodes; i++) {
    U8_node* node = &nodes[i];   
    u16 type = be16((u8*)&node->type);
    u16 name_offset = be16((u8*)&node->name_offset);
    u32 data_offset = be32((u8*)&node->data_offset);
    u32 size = be32((u8*)&node->size);
    char* name = (char*) &string_table[name_offset];
    char* premarker;
    char* postmarker;
    
    if (type == 0x0100) {
      premarker = "";
      postmarker = "/";
    } else {
      premarker = " ";
      postmarker = "";
    }
    
    printf("%s%s%s (%d) offset: %x\n", premarker, name, postmarker, size, data_offset);
  }
}

int main(int argc, char **argv)
{
  if (argc == 3) {
    outdir = argv[2];
  } else if (argc != 2) {
    ERROR("Usage: parse-u8 <file> [<outdir>]");
  }

	fp = fopen(argv[1], "rb");

//  mkdir(outdir, 0777);
//  chdir(outdir);
  
  do_U8_archive();

	fclose(fp);

	return 0;
}