Audition .acv format

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Jakup
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Audition .acv format

Post by Jakup » Tue Oct 16, 2018 11:34 am

Hey guys!
Right now im working on a unpacker for Audition.
The game is using a archive format inside the acv. (zlib)
Its encrypted with blowfish.
I found out the ACV Header Key and the decryption key.
To unpack the files i need to know the offset etc but i couldnt find them yet.

Example:
unsigned char acv4key[] =
{
0xB5, 0xA5, 0xC0, 0xCC, 0xC5, 0xB8, 0xC6, 0xC4,
0xC0, 0xCF, 0x20, 0xBF, 0xA3, 0xC5, 0xA9, 0xB8,
0xB3, 0xC6, 0xAE, 0x2F, 0xB5, 0xF0, 0xC5, 0xA9,
0xB8, 0xB3, 0xC6, 0xAE, 0x20, 0xC5, 0xB0, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

unsigned char acvkey4header[] =
{
0x41, 0x43, 0x56, 0xB5, 0xA5, 0xC0, 0xCC, 0xC5,
0xB8, 0xC6, 0xC4, 0xC0, 0xCF, 0x20, 0xC7, 0xEC,
0xB4, 0xF5, 0x20, 0xC5, 0xB0, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
This is the example how i call it:
int main(int argc, char * argv[] )
{
BlowFish::CBlowFish crypt( &acvkey4header[0], 56);
FILE * in = fopen("077.acv","rb");
int filecount=0;
unsigned short csize;
unsigned char * bufin = new unsigned char[1024*1024];
unsigned char * bufout = new unsigned char[1024*1024];
//fread( bufin, 4, 1, in);
fread( &filecount, 4, 1, in );
fread( &csize, 2, 1, in );

fread( bufin, csize, csize, in );
crypt.Decrypt( bufin, bufout, csize );
uncompress(bufin, (uLongf *)&filecount, bufout, 1024*1024 );

fclose(in);
But its completly wrong since i dont know how to get filecount csize and bufin.

I attached a acv file here what is using the new acv format.
The acv header is FF 03 00.
Maybe i got the keys wrong but i reversed them.
Maybe someone is smart and could help me out.

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Bigchillghost
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Re: Audition .acv format

Post by Bigchillghost » Tue Oct 16, 2018 2:57 pm

Jakup wrote: I attached a acv file here what is using the new acv format.
Forgot your attachment?
May you find peace in this puzzle-solving game. Say it with action: click the Image when you get helped.:)

Jakup
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Re: Audition .acv format

Post by Jakup » Tue Oct 16, 2018 4:04 pm

oh im sorry

https://www.file-upload.net/download-13 ... 7.acv.html

idk how i can do that in quickbms

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