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Playstation apply PPF files source code

PS_2's profile picture
Published in 
Playstation
 · 5 years ago

 

/******************************************************************************
** Functions by Derrick Sobodash
** http://www.cinnamonpirate.com/
** Submitted to ROM Hacking.net on July 3, 2006
******************************************************************************/


/******************************************************************************
** apply_ppf()
*******************************************************************************
** syntax: void apply_ppf(string ppf_file, string bin_file)
*******************************************************************************
** Applies ppf_file to bin_file if both files exist.
******************************************************************************/


function apply_ppf($ppf_file, $bin_file)
{

// Make sure the input is all valid
if(!file_exists($ppf_file))
die("Error: apply_ppf(): Unable to open $ppf_file\r\n\r\n");
if(!file_exists($bin_file))
die("Error: apply_ppf(): Unable to open $bin_file\r\n\r\n");

// This is dirty code, it should be fixed later
$ppfdump = file_read($ppf_file);
if(strpos($ppfdump, "@BEGIN_FILE_ID"))
$ppf_end = strpos($ppfdump, "@BEGIN_FILE_ID");
else
$ppf_end = filesize($ppf_file);
unset($ppfdump);

// Open the patch file as a stream
$ppf = fopen($ppf_file, "rb");

if(fread($ppf, 3) != "PPF")
die("Error: apply_ppf(): Not a valid PPF patch\r\n\r\n");

$magic = fread($ppf, 2);

if(($magic == "10" || $magic == "20" || $magic == "30") && ord(fgetc($ppf)) == 0)
{

// Skip PPF internal info

fseek($ppf, 56, SEEK_SET);

// Open the binary file in read/write mode
$fa = fopen($bin_file, "r+b");

while($ftell($ppf) < $ppf_end)
{

fseek($fa, punpack(fread($ppf, 4)), SEEK_SET);
$length = ord(fgetc($fa));
fputs($fa, fread($ppf, $length));

}

fclose($fa);
fclose($ppf);

}

else if(($magic == "20" || $magic == "30") && ord(fgetc($ppf)) == 1)
{

// Skip PPF internal info

fseek($ppf, 56, SEEK_SET);

// Open the binary file in read/write mode
$fa = fopen($bin_file, "r+b");

// Run the PPF file size check
if(punpack(fread($ppf, 4)) != filesize($bin_file))
die("Error: apply_ppf(): Target file size does not match patch requirement\r\n\r\n");

// Run the PPF sector match check
fseek($fa, 0x9320, SEEK_SET);
$ppf_bin_block = fread($ppf, KBYTE);
$org_bin_block = fread($fa, KBYTE);

fseek($fa, 0, SEEK_SET);

if($ppf_bin_block != $org_bin_block)
die("Error: apply_ppf(): Target file sector \$9320 does not match patch requirement\r\n\r\n");

// Unset variables and free up some RAM
unset($ppf_bin_block, $org_bin_block);

while($ftell($ppf) < $ppf_end)
{

fseek($fa, punpack(fread($ppf, 4)), SEEK_SET);
$length = ord(fgetc($fa));
fputs($fa, fread($ppf, $length));

}

fclose($fa);
fclose($ppf);

}

else if($magic == "30" && ord(fgetc($ppf)) == 2)
{

// Skip PPF internal info

fseek($ppf, 56, SEEK_SET);

$imagetype = ord(fgetc($ppf));
$blockcheck = ord(fgetc($ppf));
$undodata = ord(fgetc($ppf));
$dummy = fgetc($ppf);

// Open the binary file in read/write mode
$fa = fopen($bin_file, "r+b");

// Run the PPF sector match check
if($blockcheck != 0)
{

if($imagetype == 0)
fseek($fa, 0x9320, SEEK_SET);
else if($imagetype == 1)
fseek($fa, 0x80a0, SEEK_SET);
$ppf_bin_block = fread($ppf, KBYTE);
$org_bin_block = fread($fa, KBYTE);

fseek($fa, 0, SEEK_SET);

if($ppf_bin_block != $org_bin_block)
die("Error: apply_ppf(): Target file sector does not match patch requirement\r\n\r\n");

// Unset variables and free up some RAM
unset($ppf_bin_block, $org_bin_block);
}

while($ftell($ppf) < $ppf_end)
{

fseek($fa, punpack(fread($ppf, 8)), SEEK_SET);
$length = ord(fread($ppf, 2));
fputs($fa, fread($ppf, $length));

}

fclose($fa);
fclose($ppf);

}

else
die("Error: apply_ppf(): Unsupported PPF version\r\n\r\n");

}

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