Insane 1nsane IDF

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IDF

  • Format Type : Archive
  • Endian Order : Little Endian
  • Signature : FFFL


Format Specifications

// 1nsane PC
// IDF file format

// little endian

// header
4 bytes (char) - signature  // "FFFL"
4 bytes (uint32) - version?  // 12
4 bytes (uint32) - TOC type // 0x00010000 - unencrypted TOC
                            // 0x00010100 - encrypted TOC
4 bytes (uint32) - TOC offset  // XORed with 0x123
4 bytes (uint32) - encryption key


// data
num_of_files *
{
   x bytes - file data
}

// TOC
4 bytes (uint32) - number of files
num_of_files *
{
   52 bytes (char) - file name + padding  // e.g. "Data\Misc\japan.pcx"
   4 bytes (uint32) - unknown
   4 bytes (uint32) - file offset
   4 bytes (uint32) - file size
}
4 bytes (uint32) - number of files (repeated?)

MultiEx BMS Script

Not written yet.

QuickBMS Script

Notes and Comments

  • Table of Content (archive footer) is encrypted with XOR encryption. TOC offset is XORed with 0x123.
  • Data seems to be unencrypted and uncompressed.
  • IDF extension is probably translated to "Insane Data File".

Encryption Method

Below is example of the code from quickbms script which may be used to decrypt TOC:

for i = 0 < TOC_LENGTH
	get NEW_BYTE byte
	XMATH NEW_BYTE "NEW_BYTE ^ TOC_XOR_KEY"
	XMATH TOC_XOR_KEY "(NEW_BYTE + i + (TOC_XOR_KEY * 5)) & 0xFF" 

Games

List of games using this file format:

  • Insane / 1nsane

Compatible Programs

See Also

Gallery