gust_enc.json

{
    "version": 0x300,
    /* Change to false if you don't want to spend time validating that the numbers below are prime */
    "validate_primes": true,
    /* Change to the id of the game you wish to descramble (using one of the ids below) */
    "seeds_id": "A21",
    /* Seeds used by a game executable can be found in its IDA Freeware disassembly:
     * 1. Locate the function call that uses literal value 3B9A73C9h (SEED_CONSTANT).
     *    Note that there may be multiple similar function calls with different seeds, so make sure to pick the right one!
     * 2. At the beginning of that function you get length[] and table[] array values (lengths are usually 1Dh, 13h, 0Bh).
     * 3. Find the first call to a function that uses parameters 800h and 100h and look for another literal. That's main[0].
     * 4. Find the next literal being used after this call. That's main[1].
     * 5. Go further down and look for 2 literals, one of which is half the value of the first and is prime. That's fence.
     * 6. Finally look for a call near the end where 80h is used as parameter. The other literal there is main[2].
     * Note: All of the seeds are prime numbers so if you have a number that is not prime, then it's not a seed.
     * If needed, you can access deobfuscated binary code (to use with IDA) by saving the WinDbg dump.
     *
     * Note that Fairy Tail uses a slightly different scrambling set, which isn't documented here.
     */
    "seeds": [
        {
            "id": "A16",
            "name": "Atelier Shallie",
            "version": 2,
            "main": [
                0x6df7,
                0xc953,
                0x72ef
            ],
            "table": [
                0xaa83,
                0xac8b,
                0x89cf
            ],
            "length": [
                0x1d,
                0x13,
                0x0b
            ],
            "fence": 0x9fd
        },
        {
            "id": "A17",
            "name": "Atelier Sophie",
            "version": 2,
            "main": [
                0x6e45,
                0xc9af,
                0x7525
            ],
            "table": [
                0xa9d9,
                0xae8f,
                0x89f5
            ],
            "length": [
                0x1d,
                0x13,
                0x0b
            ],
            "fence": 0x0a99
        },
        {
            "id": "A18",
            "name": "Atelier Firis",
            "version": 2,
            "main": [
                0x69b5,
                0xd069,
                0x7577
            ],
            "table": [
                0xa80b,
                0xb3c5,
                0x8c89
            ],
            "length": [
                0x1d,
                0x13,
                0x0b
            ],
            "fence": 0x0aed
        },
        {
            "id": "A19",
            "name": "Atelier Lydie & Suelle",
            "version": 2,
            "main": [
                0x6d7b,
                0xcac3,
                0x747b
            ],
            "table": [
                0xa8e5,
                0xb0b1,
                0x8a5b
            ],
            "length": [
                0x1d,
                0x13,
                0x0b
            ],
            "fence": 0x0ab5
        },
        {
            "id": "A20",
            "name": "Atelier Lulua",
            "version": 2,
            "main": [
                0x6d7b,
                0xcac3,
                0x747b
            ],
            "table": [
                0xa8e5,
                0xb0b1,
                0x8a5b
            ],
            "length": [
                0x1d,
                0x13,
                0x0b
            ],
            "fence": 0x0ab5
        },
        {   // Atelier Ryza (A21), Atelier Ryza 2 (A22), Blue Reflection 2 and Atelier Sophie 2 (A23)
            "id": "A21",
            "name": "Atelier Ryza",
            "version": 2,
            "main": [
                0x6d3f,
                0xcb53,
                0x74b9
            ],
            "table": [
                0xa83b,
                0xb11d,
                0x88a5
            ],
            "length": [
                0x1d,
                0x13,
                0x0b
            ],
            "fence": 0x0a31
        },
        {
            "id": "ANW",
            "name": "Ateliers of the New World (Nelke & the Legendary Alchemists)",
            "version": 2,
            "main": [
                0x6d7b,
                0xcac3,
                0x747b
            ],
            "table": [
                0xa8e5,
                0xb0b1,
                0x8a5b
            ],
            "length": [
                0x1d,
                0x13,
                0x0b
            ],
            "fence": 0x0ab5
        },
        {
            "id": "NOA",
            "name": "Nights of Azure / Nights of Azure 2",
            "version": 2,
            "main": [
                0x6d73,
                0xc979,
                0x728f
            ],
            "table": [
                0xa9bb,
                0x892d,
                0x8939
            ],
            "length": [
                0x1f,
                0x1d,
                0x17
            ],
            "fence": 0x09a9
        },
        {   // Note: "Blue Reflection: Second Light" uses the same seed as A21
            "id": "BR",
            "name": "Blue Reflection",
            "version": 2,
            "main": [
                0x6947,
                0xcb63,
                0x7597
            ],
            "table": [
                0xa829,
                0xb047,
                0x8af5
            ],
            "length": [
                0x1d,
                0x13,
                0x0b
            ],
            "fence": 0x0b23
        },
        {
            "id": "FT",
            "name": "Fairy Tail",
            "version": 3,
            "main": [
                0x3e87,
                0xcac3,
                0x0000 // Only two main seeds are used
            ],
            "table": [
                0xa8e5,
                0xb0b1,
                0x8a5b
            ],
            "length": [
                0x11,
                0x0b,
                0x13
            ],
            "fence": 0x0755
        }
    ]
}