text: /*
  Developed by Luis Alberto
  email: alberto.bsd@gmail.com
  gcc -o keymath keymath.c -lgmp
  */
  
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <stdint.h>
  #include <stdbool.h>
  #include <gmp.h> 
  #include <string.h>
  #include <unistd.h>
  #include <math.h>
  #include <time.h>
  #include "util.h"
  
  #include "gmpecc.h"
  #include "base58/libbase58.h"
  #include "rmd160/rmd160.h"
  #include "sha256/sha256.h"
  
  
  struct Elliptic_Curve EC;
  struct Point G;
  struct Point DoublingG[256];
  
  const char *version = "0.1.211009";
  const char *EC_constant_N = "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141";
  const char *EC_constant_P = "fffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2f";
  const char *EC_constant_Gx = "79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798";
  const char *EC_constant_Gy = "483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8";
  
  char *str_output = NULL;
  char *str_input = NULL;
  char *str_publickey_ptr = NULL;
  
  char str_publickey[132];
  char str_rmd160[41];
  char str_address[41];
  
  mpz_t A,B,C;
  
  int FLAG_NUMBER = 0;
  
  mpz_t inversemultiplier,number;
  
  int main(int argc, char **argv)  {
  	char buffer_input[1024];
  	mpz_init_set_str(EC.p, EC_constant_P, 16);
  	mpz_init_set_str(EC.n, EC_constant_N, 16);
  	mpz_init_set_str(G.x , EC_constant_Gx, 16);
  	mpz_init_set_str(G.y , EC_constant_Gy, 16);
  
  	mpz_init_set_ui(A,0);
  	mpz_init_set_ui(B,0);
  	mpz_init_set_ui(C,0);
  	
  	mpz_init(number);
  	mpz_init(inversemultiplier);
  	
  	if(argc < 4)	{
  		printf("Missing parameters\n");
  		exit(0);
  	}
  	
  	
  	mpz_set_str(A,argv[1],0);
  	mpz_set_str(B,argv[3],0);
  	
  	switch(argv[2][0])	{
  		case '+':
  			mpz_add(C,A,B);	
  			mpz_mod(C,C,EC.n);
  		break;
  		case '-':
  			mpz_sub(C,A,B);
  			mpz_mod(C,C,EC.n);
  		break;
  		case '/':
  			mpz_invert(inversemultiplier,B,EC.n);
  			mpz_mul(C,A,inversemultiplier);
  			mpz_mod(C,C,EC.n);
  		break;
  		case 'x':
  			mpz_mul(C,A,B);
  			mpz_mod(C,C,EC.n);
  		break;		
  	}
  	gmp_printf("Result: %Zx\n\n",C);	
  }
  