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Rulesless, posted Sat May 09, 2020 10:37 pm (56629)

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How unpack/repack?
thimbleweed_park.bms ask for "MEMORY_FILE10" and engge.exe not done any output or log.

atom0s, posted Mon May 11, 2020 3:06 am (56657)

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Here's a modded version of the thimbleweed_park.bms for this game:

Code:

# Delores: A Thimbleweed Park Mini-Adventure (script 0.1.2)
#   select R when quickbms will ask about files that already exist
# script for QuickBMS http://quickbms.aluigi.org

quickbmsver "0.8.0"

set KEY binary "\x3F\x41\x41\x60\x95\x87\x4A\xE6\x34\xC6\x3A\x86\x29\x27\x77\x8D\x38\xB4\x96\xC9\x38\xB4\x96\xC9\x00\xE0\x0A\xC6\x00\xE0\x0A\xC6\x00\x3C\x1C\xC6\x00\x3C\x1C\xC6\x00\xE4\x40\xC6\x00\xE4\x40\xC6 "

# https://github.com/mstr-/twp-ggdump/blob/master/ggdump/ggdump.py
set MEMORY_FILE10 string "
    void decode_unbreakable_xor(unsigned char *magic_bytes, unsigned char *buffer, int buf_len) {
        unsigned char var4 = buf_len;
        int     c;
        for(int i = 0; i < buf_len; i  ) {
            buffer[i] ^= (((i & 0xFF) * 0x6D) ^ magic_bytes[i & 0x0F]) ^ var4;
            var4 ^= buffer[i];
        }
    }
"

encryption calldll "MEMORY_FILE10 decode_unbreakable_xor tcc RET KEY #INPUT# #INPUT_SIZE#"

get data_offset long
get data_size long
log MEMORY_FILE data_offset data_size

idstring MEMORY_FILE "\x01\x02\x03\x04"
get DUMMY long MEMORY_FILE
get NAMES_OFF long MEMORY_FILE
math NAMES_OFF   1

/*
# boring opcode stuff...
for
    get OPCODE byte MEMORY_FILE
    if OPCODE == 2

        savepos TMP MEMORY_FILE
        goto NAMES_OFF MEMORY_FILE
        get NAME_OFF long MEMORY_FILE
        savepos NAMES_OFF MEMORY_FILE
        goto NAME_OFF MEMORY_FILE
        get NAME string MEMORY_FILE
        goto TMP MEMORY_FILE

        get DUMMY long MEMORY_FILE
        get DUMMY long MEMORY_FILE

    elif OPCODE == 3

        get DUMMY long MEMORY_FILE  # number of files

    elif OPCODE == 4

        get DUMMY long MEMORY_FILE
        get DUMMY long MEMORY_FILE

    elif OPCODE == 5

        get DUMMY long MEMORY_FILE
        get DUMMY long MEMORY_FILE
        get DUMMY byte MEMORY_FILE
        get DUMMY long MEMORY_FILE
        get DUMMY byte MEMORY_FILE

    else

        cleanexit

    endif
next
*/

set NAME string ""
math XOFFSET = 0
math XSIZE   = 0

goto NAMES_OFF MEMORY_FILE
for i = 0
    get NAME_OFF long MEMORY_FILE
    if NAME_OFF == 0xffffffff
        break
    endif
    savepos TMP MEMORY_FILE
    goto NAME_OFF MEMORY_FILE
    get STR string MEMORY_FILE
    goto TMP MEMORY_FILE

      if STR == "files"
    elif STR == "filename"
    elif STR == "offset"
    elif STR == "size"
    else
        # 0:name, 1:offset, 2:size
        # BUT sometimes SIZE is not specified so let's guess it

        math TMP = i
        math i   1
        math TMP % 3
        if TMP == 0
            set NAME string STR
        elif TMP == 1
            math XOFFSET = STR
        elif TMP == 2
            math TMP = STR
            if TMP == 0
                set NAME string STR
                math i   1
                # take the old XSIZE
            else
                math XSIZE = STR
            endif
            log NAME XOFFSET XSIZE
        endif
    endif
next

Just the magic bytes key changed.

aluigi, posted Mon May 11, 2020 10:56 am (56662)

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Well done, I update the script for testing both the keys.

Rulesless, posted Mon May 11, 2020 11:23 am (56664)

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atom0s wrote:

Here's a modded version of the thimbleweed_park.bms for this game:

Code:

# Delores: 
[...]

Just the magic bytes key changed.

Thanks, very apreciated

Rulesless, posted Mon May 11, 2020 12:47 pm (56665)

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aluigi wrote:

Well done, I update the script for testing both the keys.

Seems not working anymore with first Thimbleweed.
And no mod accepted in recompiled Delores, not even in hex.

aluigi, posted Tue May 12, 2020 8:29 am (56686)

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Can you provide a sample file for me to test?

Rulesless, posted Tue May 12, 2020 11:04 am (56689)

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Here original file (Delores0.ggpack1) and repacked file Delores.ggpack1 with reimported "Natalie.yack", only one untuched file; the game is free:
https://drive.google.com/open?id=1AhQfO ... Pr0srlJpBY

Trying exportig ThimbleweedPark.ggpack1 of first game, instead:

Code:

Error: [myfseek] offset 0x0d04c6e7 in file -1 can't be reached

Last script line before the error or that produced the error:
  92  goto NAME_OFF MEMORY_FILE

And with other ThimbleweedPark.ggpack2 file:

Code:

- library MEMORY_FILE10 loaded at address 05E0AED8
- function found at offset 05E01800
  00000000 0          bffset

-------------------
*EXCEPTION HANDLER*
-------------------
An error or crash occurred:

*EH* ExceptionCode      c0000005 access violation
*EH* ExceptionFlags     00000000
*EH* ExceptionAddress   05E01874
*EH* NumberParameters   00000002
*EH*                    00000001
*EH*                    00B556DE

Last script line before the error or that produced the error:
  121 endif

Thank you for your support.

aluigi, posted Thu May 14, 2020 1:12 pm (56742)

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The script works perfectly with the Delores*.ggpack1 samples you provided.

Rulesless, posted Thu May 14, 2020 2:26 pm (56755)

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It extract files, but it have problem reimporting.
This are files wich I've provided (the differences between original and "modded" with reimported untuched file):



And this is the problem:



...so "perfectly" not.

aluigi, posted Thu May 14, 2020 3:37 pm (56756)

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Because the decryption function is just for decrypting so it corrupts the data when you reimport the files.
So, yes, extraction is perfect.

I have just made a new version of the script that allows reimporting.
The only thing you must do is uncommenting (removing the initial #) line 37.
Just tested and the extracted files from the reimported ggpack1 are perfect.

aluigi, posted Thu May 14, 2020 3:38 pm (56757)

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Ah, remember that you must use reimport.bat which is limited by the size of the original file.
The reason is that the table is encrypted and cannot be modified.
I don't know if the game is going to accepted the edited files, if it uses a checksum then you can't do much.

Rulesless, posted Thu May 14, 2020 3:58 pm (56759)

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Great! No checksum.
I always use your reimport.bat
Thanks

Rulesless, posted Thu May 14, 2020 4:32 pm (56760)

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Someone knows if .dink files can only be edited in hex?