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

align="justify"> unsigned * temp2 = new unsigned [17];

if ((i> j) | | ((i == j) && (ostT [i]> b [j])))

{

do

{

for (int g = 0; g <17; g+ +) temp1 [g] = 0;

if (ostT [i]> b [j]) del = (ost [i]/b [j]);

else

{

i -;

point.a [0] = ostT [i];

point.a [1] = ostT [i +1];

del = point.b/b [j] - 1;

del = (del == 0)? 1: del;

}

RaznPoz = i - j;

temp1 [RaznPoz] = del;

rez [RaznPoz] = (rez [RaznPoz] == 0)? del: (rez [RaznPoz] + del);

Mult16 (b, temp1, temp2);

Razn16 (ostT, temp2, temp1);

for (int u = 15; u> = 0; u -) ostT [u] = temp1 [u];

i = 8;

do

{

i -;

if (i == -1) {i = 0; break;}

} while (ostT [i] == 0);

} while (i> j);

int pointer = 0;

for (g = 0; g <8; g+ +) temp2 [g] = b [g];

for (g = 8; g <16; g+ +) temp2 [g] = 0;

while (ostT [i]> = b [j])

{

Razn16 (ostT, temp2, temp1);

for (g = 7; g> = 0; g -) ostT [g] = temp1 [g];

pointer + +;

} ;

rez [0] + = pointer;

} ;

delete temp1;

delete temp2;

}

3. idea.cpp

// ================== idea.cpp =================== =========

// ------- International Data Encription Algorithm -------- unsigned long type32; unsigned type16; unsigned char type8;

// ---------------------------------------- -------------- EncriptionStep (unsigned *, unsigned *); IDEA (unsigned *, unsigned *); SdvigMas1_4 (unsigned *); GenerateKey (type16 *, type16 *); sdvig25 (type16 *); IDEA_OFB (unsigned *, unsigned *, unsigned *, int); mul (unsigned, unsigned);

// ---------------------------------------- -------------- EncriptionStep (unsigned * key, unsigned * mes)

{

unsigned long a, b, c, d, e, f, g, h;

a = mul (mes [0], key [0]);// 1

b = ((unsigned long) mes [1] + key [1])% 65536;/...