void pollard(big id,big dl)
{
int i;
long iter;
big_chinese bc;
big w,Q,R,m,n,q;
char stack_mem[mr_big_reserve(6,50)];
memset(stack_mem,0,mr_big_reserve(6,50));
w=mirvar_mem(stack_mem,0);
Q=mirvar_mem(stack_mem,1);
R=mirvar_mem(stack_mem,2);
m=mirvar_mem(stack_mem,3);
n=mirvar_mem(stack_mem,4);
q=mirvar_mem(stack_mem,5);
copy(id,q);
crt_init(&bc,np,pp);
for (i=0;i<np;i++)
{ /* accumulate solutions for each pp */
copy(p1,w);
divide(w,pp[i],w);
powmod(q,w,p,Q);
powltr(PROOT,w,p,R);
copy(pp[i],order);
iter=rho(Q,R,m,n);
xgcd(m,order,w,w,w);
mad(w,n,n,order,order,rem[i]);
printf("%9ld iterations needed\n",iter);
}
crt(&bc,rem,dl); /* apply chinese remainder thereom */
crt_end(&bc);
}
void pollard(big id,big dl)
{
int i;
long iter;
big w,Q,R,m,n,q;
big_chinese bc;
w=mirvar(0);
Q=mirvar(0);
R=mirvar(0);
m=mirvar(0);
n=mirvar(0);
q=mirvar(0);
copy(id,q);
crt_init(&bc,np,pp);
for (i=0;i<np;i++)
{ /* accumulate solutions for each pp */
copy(p1,w);
divide(w,pp[i],w);
powmod(q,w,p,Q);
powltr(PROOT,w,p,R);
copy(pp[i],order);
iter=rho(Q,R,m,n);
xgcd(m,order,w,w,w);
mad(w,n,n,order,order,rem[i]);
printf("%9ld iterations needed\n",iter);
}
crt(&bc,rem,dl); /* apply chinese remainder thereom */
crt_end(&bc);
mirkill(q);
mirkill(n);
mirkill(m);
mirkill(R);
mirkill(Q);
mirkill(w);
}
int main()
{ /* decode using private key */
int i;
big e,ep[NP],m,ke,kd,p[NP],kp[NP],mn,mx;
FILE *ifile;
FILE *ofile;
char ifname[13],ofname[13];
BOOL flo;
big_chinese ch;
mip=mirsys(100,0);
for (i=0;i<NP;i++)
{
p[i]=mirvar(0);
ep[i]=mirvar(0);
kp[i]=mirvar(0);
}
e=mirvar(0);
m=mirvar(0);
kd=mirvar(0);
ke=mirvar(0);
mn=mirvar(0);
mx=mirvar(0);
mip->IOBASE=60;
if ((ifile=fopen("private.key","r"))==NULL)
{
printf("Unable to open file private.key\n");
return 0;
}
for (i=0;i<NP;i++)
{
cinnum(p[i],ifile);
}
fclose(ifile);
/* generate public and private keys */
convert(1,ke);
for (i=0;i<NP;i++)
{
multiply(ke,p[i],ke);
}
for (i=0;i<NP;i++)
{ /* kp[i]=(2*(p[i]-1)+1)/3 = 1/3 mod p[i]-1 */
decr(p[i],1,kd);
premult(kd,2,kd);
incr(kd,1,kd);
subdiv(kd,3,kp[i]);
}
crt_init(&ch,NP,p);
nroot(ke,3,mn);
multiply(mn,mn,m);
multiply(mn,m,mx);
subtract(mx,m,mx);
do
{ /* get input file */
printf("file to be decoded = ");
gets(ifname);
} while (strlen(ifname)==0);
strip(ifname);
strcat(ifname,".rsa");
printf("output filename = ");
gets(ofname);
flo=FALSE;
if (strlen(ofname)>0)
{ /* set up output file */
flo=TRUE;
ofile=fopen(ofname,"w");
}
printf("decoding message\n");
if ((ifile=fopen(ifname,"r"))==NULL)
{
printf("Unable to open file %s\n",ifname);
return 0;
}
forever
{ /* decode line by line */
mip->IOBASE=60;
cinnum(m,ifile);
if (size(m)==0) break;
for (i=0;i<NP;i++)
powmod(m,kp[i],p[i],ep[i]);
crt(&ch,ep,e); /* Chinese remainder thereom */
if (compare(e,mx)>=0) divide(e,mn,mn);
mip->IOBASE=128;
if (flo) cotnum(e,ofile);
cotnum(e,stdout);
}
crt_end(&ch);
fclose(ifile);
if (flo) fclose(ofile);
printf("message ends\n");
return 0;
}
