Реферат Розрахунок показників і побудова основних елементів захищених обчислювальних мереж. Розробка програмної реалізації криптографічних алгоритмів

tify"> * massiv = * (type32 *) A;

* (massiv + 1) = * (type32 *) (A + 2);

* (massiv + 2) = * (type32 *) (A + 4);

* (massiv + 3) = * (type32 *) (A + 6);

bit7 [0] = ((massiv [0] & 0x7f) <<25) &0xfe000000;

bit25 [0] = ((massiv [0] & 0xffffff80)>> 7) &0x1ffffff;

bit7 [1] = ((massiv [1] & 0x7f) <<25) &0xfe000000;

bit25 [1] = ((massiv [1] & 0xffffff80)>> 7) &0x1ffffff;

bit7 [2] = ((massiv [2] & 0x7f) <<25) &0xfe000000;

bit25 [2] = ((massiv [2] & 0xffffff80)>> 7) &0x1ffffff;

bit7 [3] = ((massiv [3] & 0x7f) <<25) &0xfe000000;

bit25 [3] = ((massiv [3] & 0xffffff80)>> 7) &0x1ffffff;

out [0] = bit7 [0] | bit25 [3];

out [1] = bit7 [1] | bit25 [0];

out [2] = bit7 [2] | bit25 [1];

out [3] = bit7 [3] | bit25 [2];

* (type32 *) A = out [0];

* (type32 *) (A + 2) = out [1];

* (type32 *) (A + 4) = out [2];

* (type32 *) (A + 6) = out [3];

delete massiv;

delete bit7;

delete bit25;

delete out;

return 1;

} IDEA_OFB (unsigned * mes, unsigned * key, unsigned * NZ, int n)

{//mes - n * 16bit

IDEA (key, NZ);

for (int i = 0; i

SdvigMas1_4 (NZ);

} mul (unsigned a, unsigned b)

{

unsigned long p;

if (a)

{ if (b)

{ p = (unsigned long) a * b;

b = p &0xffffU;

a = p>> 16;

return b - a + (b

}

else return 1-a;

}

else return 1-b;

}