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chrrox, posted Mon Aug 02, 2021 11:14 am (65459)

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What is the correct conversion types to add to a dll function in quickbms?


unit8_t -- unsigned char?
unit16_t -- ?
unit32_t -- unsigned int?
unit64_t -- ?

atom0s, posted Mon Aug 02, 2021 7:37 pm (65463)

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Pretty sure all of the calldll and similar stuff makes use of the 'tcc' (TinyC Compiler) library, so you just need to match what C expects type-wise.

uint8_t - unsigned char
uint16_t - unsigned short
uint32_t - unsigned int
uint64_t - unsigned long long

chrrox, posted Tue Aug 03, 2021 10:00 am (65473)

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Thanks for your help that worked.

Can someone help with converting this function

Code:

void create_decrypt_vector(uint8_t* key, uint8_t* encrypted_data, uint64_t encrypted_size, uint8_t* output, uint64_t output_size)

.

I am getting stuck here I think I added the Mersenne-Twister correctly?

its memory file MEMORY_FILE11

blkstuff.7z

chrrox, posted Tue Aug 03, 2021 10:10 pm (65484)

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this might be easier to clean up to help with?

Code:

set MEMORY_FILE11 string "

typedef unsigned char      u8;
typedef unsigned int       u32;
typedef unsigned long long u64;

#define NN 312
#define MM 156
#define MATRIX_A 0xB5026F5AA96619E9ULL
#define UM 0xFFFFFFFF80000000ULL /* Most significant 33 bits */
#define LM 0x7FFFFFFFULL /* Least significant 31 bits */

struct mt19937_64 {
   unsigned long long mt[NN];
   unsigned long long mti;
};

void init_genrand64(struct mt19937_64* context, unsigned long long seed)
{
    context->mt[0] = seed;
    for (context->mti=1; context->mtimti  )
        context->mt[context->mti] =  (6364136223846793005ULL * (context->mt[context->mti-1] ^ (context->mt[context->mti-1] >> 62))   context->mti);
}


unsigned long long genrand64_int64(struct mt19937_64* context)
{

       unsigned long long i;
       unsigned long long j;
       unsigned long long result;

       if (context->mti >= NN) {/* generate NN words at one time */
         unsigned long long mid = NN / 2;
         unsigned long long stateMid = context->mt[mid];
         unsigned long long x;
         unsigned long long y;

         for (i = 0, j = mid; i != mid - 1; i  , j  ) {
            x = (context->mt[i] & UM) | (context->mt[i   1] & LM);
            context->mt[i] = context->mt[i   mid] ^ (x >> 1) ^ ((context->mt[i   1] & 1) * MATRIX_A);
            y = (context->mt[j] & UM) | (context->mt[j   1] & LM);
            context->mt[j] = context->mt[j - mid] ^ (y >> 1) ^ ((context->mt[j   1] & 1) * MATRIX_A);
         }
         x = (context->mt[mid - 1] & UM) | (stateMid & LM);
         context->mt[mid - 1] = context->mt[NN - 1] ^ (x >> 1) ^ ((stateMid & 1) * MATRIX_A);
         y = (context->mt[NN - 1] & UM) | (context->mt[0] & LM);
         context->mt[NN - 1] = context->mt[mid - 1] ^ (y >> 1) ^ ((context->mt[0] & 1) * MATRIX_A);

         context->mti = 0;
       }
      
       result = context->mt[context->mti];
       context->mti = context->mti   1;

       result ^= (result >> 29) & 0x5555555555555555ULL;
       result ^= (result << 17) & 0x71D67FFFEDA60000ULL;
       result ^= (result << 37) & 0xFFF7EEE000000000ULL;
       result ^= (result >> 43);
       return result;
}



void create_decrypt_vector(u8 *key, u8 *encrypted_data, u64 block_size, u64 encrypted_size, u8 *output, u64 output_size, u64 size) {
    u32 v9 = 0;
    u64 i;
    u64 v12;

    for (i = -1; ; i = v12) {
        if (v9 >= (int)(encrypted_size >> 3))
            break;
        //v12 = ((u64*)encrypted_data)[v9] ^ i;
          v9;
    }

    u64* key_qword = (u64*)key;
    u64 seed = key_qword[1] ^ 0x567BA22BABB08098 ^ i ^ key_qword[0];
    struct mt19937_64 context;
    init_genrand64(&context, seed);
    for (u64 i = 0; i < 10 >> 3; i  )
        genrand64_int64(&context);
    //auto mt_rand = std::mt19937_64(seed);
    //for (uint64_t i = 0; i < output_size >> 3; i  )
    //    ((uint64_t*)output)[i] = mt_rand();

}
"

Ekey, posted Thu Aug 05, 2021 10:58 am (65531)

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My similar script with Mersenne Twister realization > viewtopic.php?t=13086