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#include <iostream>
#include <fstream>
#include <sstream>
#include <stdexcept>
#include <algorithm>
#include <cstdlib>
#include <cctype>
#include <ctime>
#include <cassert>
#include "aes.h"
#include "base64.h"
#include "bigint.h"
#include "envelope.h"
#include "numalgo.h"
#include "primes.h"
#include "rng.h"
#include "rsa.h"
using namespace std;
class eof_error : public runtime_error{
public:
eof_error()
:runtime_error("EOF"){}
};
int64_t rand64(){
return ((int64_t)rand()<<32)+(((int64_t)rand()%2)<<31)+rand();
}
Bigint readevalexpr(istream &is){
Bigint a;
is>>a;
if(is.eof())throw eof_error();
// cerr<<"Read "<<a<<endl;
if(!is.fail())return a;
is.clear();
string s;
is>>s;
assert(!is.fail());
a=readevalexpr(is);
Bigint b=readevalexpr(is);
//cerr<<"Operation "<<s<<" on "<<a<<" and "<<b<<endl;
if(s=="add")return a+b;
else if(s=="sub")return a-b;
else if(s=="mul")return a*b;
else if(s=="div")return a.divmod(b).first;
else if(s=="mod")return a.divmod(b).second;
else {
cerr<<"Unknown operation '"<<s<<'\''<<endl;
assert(false);
}
}
void biginttest(){
srand(time(NULL));
// cerr<<Bigint(599428191)*Bigint(10)<<endl;
// cerr<<hex<<Bigint(599428191)*Bigint(10)<<endl;
#if 1
{
Bigint bi;
assert(RAND_MAX==(1U<<31)-1);
for(int i=0;i<500000;i++){
int64_t a=rand64(),b=rand64();
if(a+b<0){i--; continue;}
stringstream s1,s2,s3;
s1<<a+b;
s2<<Bigint(a+b);
s3<<Bigint(a)+Bigint(b);
assert(s1.str()==s2.str()&&s1.str()==s3.str());
}
}
#endif
#if 1
{
for(int i=0;i<1000;i++){
int64_t n=rand64();
istringstream ss(to_string(n));
Bigint bi;
ss>>bi;
assert(bi==Bigint(n));
}
}
#endif
#if 1
{
string s="4405994068155852661780322209877856931246944549396705884037139443014164958640201650440984581318995014";
istringstream iss(s);
Bigint bi;
iss>>bi;
uint32_t digs[11]={1752788038,953502834,2175607868,1627159508,1754291416,1207689192,3196357285,3165170272,3313904421,3194703103,2062};
for(int i=0;i<11;i++)assert(bi._digit(i)==digs[i]);
ostringstream oss;
oss<<bi;
assert(oss.str()==s);
}
#endif
}
void repl(int argc,char **argv){
istream *in;
if(argc==2)in=new ifstream(argv[1]);
else in=&cin;
for(int i=0;;i++){
try {
cout<<readevalexpr(*in)<<endl;
} catch(eof_error){
break;
}
}
if(in!=&cin)delete in;
}
void testisqrt(int argc,char **argv){
int randsize=argc==2?strtol(argv[1],nullptr,10):1;
assert(randsize>=1);
for(int i=0;i<1000;i++){
Bigint n(rand64());
for(int j=1;j<randsize;j++){
n<<=63;
n+=rand64();
}
// cout<<hex<<n<<dec<<endl;
Bigint root(isqrt(n));
assert(root*root<=n);
root+=Bigint::one;
assert(root*root>n);
}
}
void performrsa(){
RSA::PrivateKey privkey;
Bigint p(1000000007),q(3000000019U);
privkey.pub.mod=(int64_t)3000000040000000133LL;
privkey.pub.exp=65537;
{
Bigint x;
egcd((p-Bigint::one)*(q-Bigint::one),privkey.pub.exp,x,privkey.pexp);
}
cout<<"d = "<<privkey.pexp<<endl;
Bigint msg(123456789);
cout<<"msg = "<<msg<<endl;
Bigint encr=RSA::encrypt(msg,privkey.pub);
cout<<"encr = "<<encr<<endl;
Bigint msg2=RSA::decrypt(encr,privkey);
cout<<"msg = "<<msg2<<endl;
}
void pseudolist(bool(*func)(const Bigint&)){
fillsmallprimes();
for(int i=2;i<65000;i++){
// cerr<<"TRYING "<<i<<endl;
bool actualprime=binary_search(smallprimes.begin(),smallprimes.end(),i);
if(!func(Bigint(i))){
if(actualprime){
cerr<<"Test misleadingly said that "<<i<<" isn't prime, while it is!"<<endl;
exit(1);
}
continue;
}
if(!actualprime)cout<<i<<' ';
}
cout<<endl;
}
void listprimes(){
int n=0;
Bigint x(3);
x*=x;
x*=x;
x*=x;
x*=x;
x*=x;
x*=x;
x*=x;
Bigint y(x+10000);
cout<<x<<' '<<y<<endl;
for(Bigint i(x);i<=y;i+=1){
if(bailliePSW(i)){
cout<<i<<endl;
n++;
}
}
cout<<n<<endl;
}
int main(int argc,char **argv){
(void)argc;
(void)argv;
// biginttest();
// repl(argc,argv);
// performrsa();
// testisqrt(argc,argv);
// randprime(Bigint(20),Bigint(42));
// strongLucasPrime(Bigint(5));
// cout<<strongLucasPrime(Bigint(5777))<<endl;
// pseudolist(strongPseudoPrime2);
// pseudolist(strongLucasPrime);
// listprimes();
// Rng rng("wachtwoord");
// for(int i=0;i<100000;i++)cout<<rng.get()<<endl;
// for(int i=0;i<10000;i++)cout<<arc4random()<<endl;
/*KeyRng rng("wachtwoord"); //for DieHarder
char data[4];
for(int i=0;i<10000000;i++){
*(uint32_t*)data=rng.get();
fwrite(data,1,4,stdout);
}*/
/*string s;
while(true){
char c=cin.get();
if(!cin)break;
s.push_back(c);
}
cout<<Base64::encode(s)<<endl;
// cout<<Base64::decode(s)<<flush;*/
// AES::test();
// cout<<Base64::encode(AES::encrypt("goeiemorgen dit is leuke data enzoo","123456789abcdefx",AES::AES_128_CBC))<<endl;
// cout<<AES::decrypt(Base64::decode("dv2N3n2FHsD7LU2PAZnZm/bLQQSaaZoDDFjy3VrSu2JCHN5KuyBlinlh9C71IGTbT4/WvRKLp6dp1TfrKXIG2w=="),"123456789abcdefx",AES::AES_128_CBC)<<endl;
RSA::PrivateKey privkey(RSA::genkey(2048,"goeiemorgen"));
cerr<<"privkey.pexp="<<privkey.pexp<<endl;
// stringstream ss("146142527763115590918816237475833862275078269531224490080731579415134484175830244922030574137988310092068583287060550616357026989772917226684940867892409");
// Bigint d;
// ss>>d;
// cout<<RSA::decrypt(d,privkey)<<endl;
string crypt(Envelope::encrypt("hallo hallo dit is leuke data enzo",privkey.pub));
cout<<Base64::encode(crypt)<<endl;
string decr(Envelope::decrypt(crypt,privkey));
cout<<decr<<endl;
}
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