Курсовая работа: Программирование алгоритма цифровой подписи ГОСТ Р 34.10-94

add_c[i]=LOWORD(T);

d=HIWORD(T);}

add_c[add_l_a_b]=d;}

void sub(unsigned short sub_a[], unsigned short sub_b[],unsigned short sub_c[], int sub_l_a_b)

{unsigned long T;

unsigned short d;

d=0;

for(int i=0; i<=(sub_l_a_b-1); i++)

{T=(unsigned long)sub_a[i]-(unsigned long)sub_b[i]-d;

sub_c[i]=LOWORD(T);

if(HIWORD(T)==0) d=0;

else d=1;}

sub_c[sub_l_a_b]=d;}

/*multiplication c=a*b*/

void mul(unsigned short mul_a[], unsigned short mul_b[],unsigned short mul_c[],int mul_l_a, int mul_l_b)

{unsigned long T;

unsigned short d;

for(int z=0; z<=(mul_l_a-1); z++)

{mul_c[z]=0;}

for(int i=0; i<=(mul_l_a-1); i++)

{d=0;

for(int j=0; j<=(mul_l_b-1); j++)

{T=(unsigned long) mul_c[i+j]+(unsigned long) mul_a[i]*(unsigned long) mul_b[j]+d;

mul_c[i+j]=LOWORD(T);

d=HIWORD(T);}

mul_c[i+mul_l_b]=d;}}

/*c=(a*b) mod m*/

void mul_mod(unsigned short mm_a[], unsigned short mm_b[], unsigned short mm_n[], unsigned short mm_ost[], unsigned short w1[], int mm_l_a_b_n, int t)

{unsigned short *mm_d;