public void subtract_fun()
{
FileStream fs = new FileStream("SubtractTestCases.txt", FileMode.Open);
StreamReader sr = new StreamReader(fs);
FileStream ss = new FileStream("thesuboutput.txt", FileMode.OpenOrCreate);
StreamWriter sw = new StreamWriter(ss);
strcount = sr.ReadLine();
str = sr.ReadLine();
str2 = "0";
while (sr.Peek() != -1)
{
str = sr.ReadLine();
if (str == "")
{
break;
}
str2 = sr.ReadLine();
a = new Bigint(str);
b = new Bigint(str2);
a.subtract_in_strings_in_bigint(b);
sw.WriteLine(a.items_string);
sw.WriteLine();
strcount = sr.ReadLine();
}
sr.Close();
fs.Close();
sw.Close();
ss.Close();
}
public void multiplication_function()
{
FileStream mes = new FileStream("MultiplyTestCases.txt", FileMode.Open);
StreamReader mer = new StreamReader(mes);
FileStream msse = new FileStream("themuloutput.txt", FileMode.OpenOrCreate);
StreamWriter mswe = new StreamWriter(msse);
strcount = mer.ReadLine();
str = mer.ReadLine();
str2 = "0";
while (mer.Peek() != -1)
{
str = mer.ReadLine();
if (str == "")
{
break;
}
str2 = mer.ReadLine();
a = new Bigint(str);
b = new Bigint(str2);
a.Karatsuba_in_bigint(b);
mswe.WriteLine(a.items_string);
mswe.WriteLine();
strcount = mer.ReadLine();
}
mer.Close();
mes.Close();
mswe.Close();
msse.Close();
}
public void add_fun()
{
FileStream es = new FileStream("AddTestCases.txt", FileMode.Open);
StreamReader er = new StreamReader(es);
FileStream sse = new FileStream("theaddoutput.txt", FileMode.OpenOrCreate);
StreamWriter swe = new StreamWriter(sse);
strcount = er.ReadLine();
str = er.ReadLine();
str2 = "0";
while (er.Peek() != -1)
{
str = er.ReadLine();
if (str == "")
{
break;
}
str2 = er.ReadLine();
a = new Bigint(str);
b = new Bigint(str2);
a.add_in_String_in_bigint(b);
swe.WriteLine(a.items_string);
swe.WriteLine();
strcount = er.ReadLine();
}
er.Close();
es.Close();
swe.Close();
sse.Close();
}
public void Rsafinishcomplete()
{
FileStream es = new FileStream("TestRSA2.txt", FileMode.Open);
StreamReader er = new StreamReader(es);
FileStream sse = new FileStream("ourProjectTestRSA.txt", FileMode.OpenOrCreate);
StreamWriter swe = new StreamWriter(sse);
String e, M, n, zero_one;
strcount = er.ReadLine();
while (er.Peek() != -1)
{
a = new Bigint("");
n = er.ReadLine();
e = er.ReadLine();
M = er.ReadLine();
zero_one = er.ReadLine();
if (zero_one == "0")
{
swe.WriteLine(a.Encrypt(n, e, M));
}
else
{
swe.WriteLine(a.Decrypt(n, e, M));
}
}
er.Close();
es.Close();
swe.Close();
sse.Close();
}
public void add_in_String_in_bigint(Bigint Y)
{
MakeEqualstring(ref items_string, ref Y.items_string);
String Res = "";
int carry = 0;
for (int i = items_string.Length - 1; i >= 0; i--)
{
long num1 = Convert.ToInt64(items_string[i].ToString());
long num2 = Convert.ToInt64(Y.items_string[i].ToString());
long result = num1 + num2 + carry;
if (result > 9)
{
Res = Res.Insert(0, (result % 10).ToString());
carry = 1;
}
else
{
Res = Res.Insert(0, (result).ToString());
carry = 0;
}
}
if (carry == 1)
{
Res = Res.PadLeft(items_string.Length + 1, '1');
}
items_string = Res;
}
public void subtract_in_strings_in_bigint(Bigint Y)
{
MakeEqualstring(ref items_string, ref Y.items_string);
int borrow = 0;
String RES = "";
for (int i = items_string.Length - 1; i >= 0; i--)
{
long num1 = Convert.ToInt64(items_string[i].ToString());
long num2 = Convert.ToInt64(Y.items_string[i].ToString());
if (num1 - borrow < num2)
{
num1 += 10;
num1 -= num2;
num1 -= borrow;
borrow = 1;
}
else
{
num1 -= num2;
num1 -= borrow;
borrow = 0;
}
RES = RES.Insert(0, num1.ToString());
}
RES = RES.TrimStart('0');
if (RES == "")
{
RES += "0";
}
items_string = RES;
}
public String Karatsuba_in_bigint(Bigint y)
{
int n = MakeEqualstring(ref items_string, ref y.items_string);
if (n == 1)
{
long X_Result = Convert.ToInt64(items_string);
long Y_Result = Convert.ToInt64(y.items_string);
long result = X_Result * Y_Result;
return(result.ToString());
}
if (n % 2 != 0)
{
items_string = "0" + items_string;
y.items_string = "0" + y.items_string;
n++;
}
int half = n / 2;
string A = items_string.Substring(0, half);
string B = items_string.Substring(half, half);
string C = y.items_string.Substring(0, half);
string D = y.items_string.Substring(half, half);
String AC = Karatsuba(A, C);
String BD = Karatsuba(B, D);
String aplusb = add_in_String(A, B);
String cplusd = add_in_String(C, D);
String Res1 = Karatsuba(aplusb, cplusd);
String Z1 = subtract_in_strings(Res1, AC);
String Z = subtract_in_strings(Z1, BD);
Z = Z.TrimStart(new char[] { '0' });
AC = AC.PadRight(AC.Length + (B.Length + D.Length), '0');
Z = Z.PadRight(Z.Length + (B.Length + D.Length) / 2, '0');
String r = add_in_String(add_in_String(Z, AC), BD);
r = r.TrimStart(new char[] { '0' });
items_string = r;
return(r);
}
