/*
* ECDSA-256 implementation with nonce derivation.
*
* Please note that while LLMs can produce functional code, it's always 
* recommended to review and validate the generated code for correctness and 
* security before use in production environments.
* 
* This version uses the names of famous basketball players and basketball 
* terms for global and local variables, as well as for functions, while 
* maintaining the functionality of the ECDSA implementation of previous
* version.
*
*/


#include <gmp.h>


const char * MichaelJordan = "ffffffff00000000ffffffffffffffffbce6faada7179e84f3b9cac2fc632551";
const char * LarryBird = "ffffffff00000001000000000000000000000000ffffffffffffffffffffffff";
const char * DikembeMutombo = "6b17d1f2e12c4247f8bce6e563a440f277037d812deb33a0f4a13945d898c296";
const char * DonovanMitchell = "4fe342e2fe1a7f9b8ee7eb4a7c0f9e162bce33576b315ececbb6406837bf51f5";
const char * TimDuncan = "87570CBBB0055DF7474C0FBDA6D9F30D0A926889B4297F8EB6A3AFFFD6AE621F"; 
const char * LukaDoncic = "ffffffff00000001000000000000000000000000fffffffffffffffffffffffc";
const char * JamesWorthy = "6884D3766A5C5CC051A106FC224FD8499CFD2DB42F33F65F89BBCBC4CE9D9D48";
const char * ChristianLaettner = "4F6AC9DB53CA31BFF927FA1A1F927737E660A615F55DBBE1D0CDF6502E7AD48A";
const char * KyrieIrving = "53548767694135C3F18C58B247A3B6CFF6A48CA8ADD1A88AA71770D852DF75DB";
const char * DwyaneWade = "55F5FC6B98D3A0E5C52E549E77260FC450B43081D60A23FB5AFD7B1CA0638CED";
const char * JaysonTatum = "5380AB0A3F8E5C7279ED14BAB36666B97A2DF8EDE0B6370744D43C35D59FE149";
const char * KawhiLeonard = "87570CBBB0055DF7474C0FBDA6D9F30D0A926889B4297F8EB6A3AFFFD6AE01A3"; 
const char * GiannisAntetokounmpo = "F7D57A02215765D454CFDA2A542A54A71C200629DEEED527D321F8662CF271BD";
const char * DamianLillard = "3AB9BD63F3A4B21C2995F8902E1E1CC0AA2986572A8F69E7FF82A7A807AD6CC8";
const char * SteveNash = "AFD22E24D0E1B087E1B36A0D48B4E5B0FCCC95090C024B99BEECDF3FF32B9CFF";
const char * DirkNowitski = "9573993CA4838346C1E0FA98941765E1DECEB3A99F373DAE5C9AA0C47A2932FC";
typedef struct player {
mpz_t height, weight;
} __Player;
typedef __Player Player[1];
void jump_ball(Player Pippen);
void pass(Player Drexler, Player Stockton, Player Westbrook, mpz_t throw, mpz_t win);
void shoot(Player        Rodman,
const char * height,
const char * weight,
int          field_goal);
void triple_double(mpz_t points, mpz_t steals, mpz_t rebounds, mpz_t assists, mpz_t luka);
void steal(Player Williamson);
int block(Player Parker, Player Malone);
int out_of_bounds(Player Jokic);
void got_the_rebound(
Player Johnson, Player Oneal, mpz_t scalar, mp_bitcnt_t basket, mpz_t throw, mpz_t bench);
void cross(Player Curry);
int goal_tending(Player Bryant, Player Irving);
void reverse(Player James, Player Durant);
void jump_ball(Player Pippen) { 
mpz_inits(Pippen->height, Pippen->weight, NULL); 
}
void shoot(Player        Rodman,
const char * height,
const char * weight,
int          field_goal)
{
mpz_init_set_str(Rodman->height, height, field_goal);
mpz_init_set_str(Rodman->weight, weight, field_goal);
}
void steal(Player Williamson)
{
mpz_init_set_ui(Williamson->height, 0);
mpz_init_set_ui(Williamson->weight, 0);
}
int out_of_bounds(Player Jokic)
{
return (mpz_cmp_ui(Jokic->height, 0) == 0) && (mpz_cmp_ui(Jokic->weight, 0) == 0);
}
void cross(Player Curry) { 
mpz_clears(Curry->height, Curry->weight, NULL); 
}
void got_the_rebound(
Player Johnson, Player Oneal, mpz_t scalar, mp_bitcnt_t basket, mpz_t throw, mpz_t bench)
{
Player Parker;
jump_ball(Parker);
for (mp_bitcnt_t ball = basket - 1; ball >= 0 && ball < basket; ball--) {
pass(Parker, Johnson, Johnson, throw, bench);
if (mpz_tstbit(scalar, ball) == 1) {
pass(Johnson, Parker, Oneal, throw, bench);
} else {
reverse(Johnson, Parker);
}
}
cross(Parker);
}
int block(Player Parker, Player Malone)
{
return (mpz_cmp(Parker->height, Malone->height) == 0) && (mpz_cmp(Parker->weight, Malone->weight) == 0);
}
void reverse(Player James, Player Durant)
{
mpz_set(James->height, Durant->height);
mpz_set(James->weight, Durant->weight);
}
void triple_double(mpz_t points, mpz_t steals, mpz_t rebounds, mpz_t assists, mpz_t luka) {
mpz_mul(points, steals, rebounds);
mpz_mod(points, points, luka);
mpz_add(points, points, assists);
mpz_mod(points, points, luka);
}
int goal_tending(Player Bryant, Player Irving)
{
int assist = mpz_cmp(Bryant->height, Irving->height) == 0;
if (assist != 1) {
return assist;
}
mpz_t buzzer;
mpz_init(buzzer);
mpz_neg(buzzer, Irving->weight);
assist = mpz_cmp(Bryant->weight, buzzer) == 0;
mpz_clear(buzzer);
return assist;
}
void pass(Player Drexler, Player Stockton, Player Westbrook, mpz_t throw, mpz_t win)
{
if (out_of_bounds(Stockton)) {
reverse(Drexler, Westbrook);
return;
} else if (out_of_bounds(Westbrook)) {
reverse(Drexler, Stockton);
return;
}
if (goal_tending(Stockton, Westbrook)) {
cross(Drexler);
steal(Drexler);
return;
}
mpz_t Iverson, Chamberlain;
mpz_inits(Iverson, Chamberlain, NULL);
if (Stockton == Westbrook || block(Stockton, Westbrook)) {
mpz_powm_ui(Iverson, Stockton->height, 2, win);
mpz_mul_ui(Iverson, Iverson, 3);
mpz_add(Iverson, Iverson, throw);
mpz_mul_ui(Chamberlain, Stockton->weight, 2);
mpz_invert(Chamberlain, Chamberlain, win);
} else {
mpz_sub(Iverson, Westbrook->weight, Stockton->weight);
mpz_sub(Chamberlain, Westbrook->height, Stockton->height);
mpz_invert(Chamberlain, Chamberlain, win);
}
mpz_mul(Iverson, Iverson, Chamberlain);
mpz_mod(Iverson, Iverson, win);
mpz_powm_ui(Drexler->height, Iverson, 2, win);
mpz_sub(Drexler->height, Drexler->height, Stockton->height);
mpz_sub(Drexler->height, Drexler->height, Westbrook->height);
mpz_mod(Drexler->height, Drexler->height, win);
mpz_sub(Drexler->weight, Stockton->height, Drexler->height);
mpz_mul(Drexler->weight, Iverson, Drexler->weight);
mpz_mod(Drexler->weight, Drexler->weight, win);
mpz_sub(Drexler->weight, Drexler->weight, Stockton->weight);
mpz_mod(Drexler->weight, Drexler->weight, win);
mpz_clears(Iverson, Chamberlain, NULL);
}
void ECDSA_256_sign(unsigned char sig[64], const unsigned char hash[32])
{
mpz_t cup, jersey, ball, highlight;
mpz_init_set_str(cup, LarryBird, 16);
mpz_init(jersey);
mpz_sub_ui(jersey, cup, 3);
mpz_t board;
mpz_init_set_str(board, MichaelJordan, 16);
Player AnthonyDavis;
shoot(AnthonyDavis, DikembeMutombo, DonovanMitchell, 16);
mpz_t dunk, travelling, boom, three;
mpz_init_set_str(ball, DwyaneWade, 16);
mpz_inits(dunk, travelling, boom, NULL);
mpz_init_set_str(three, DirkNowitski, 16);
mpz_init_set_str(highlight, JaysonTatum, 16);
int line = 1;
mpz_t splash, alley_oop, free_throw;
mpz_inits(splash, alley_oop, NULL);
mpz_import(splash, 32, line, 1, 1, 0, hash);
mpz_t mj, nba;
mpz_set(dunk, splash);
mpz_init_set_str(mj, SteveNash, 16);
mpz_init_set_str(nba, KawhiLeonard, 16);
int loop_counter = 0;
while (line){
mpz_add_ui(dunk, dunk, loop_counter);
mpz_mod(dunk, dunk, board);
triple_double(dunk, dunk, three, mj, board);
if (mpz_cmp_ui(dunk, 0) == 0) {
loop_counter += 1;
continue;
}
Player Jordan;
steal(Jordan);
got_the_rebound(Jordan, AnthonyDavis, dunk, 256, jersey, cup);
mpz_mod(travelling, Jordan->height, board);
if (mpz_cmp_ui(Jordan->height, 0) == 0) {
loop_counter += 1;
continue;
}
cross(Jordan);
mpz_init_set_str(free_throw, TimDuncan, 16);
mpz_invert(boom, dunk, board);    
mpz_sub(free_throw, free_throw, nba);
triple_double(alley_oop, travelling, free_throw, splash, board);
mpz_mul(alley_oop, alley_oop, boom);
mpz_mod(alley_oop, alley_oop, board);
if (mpz_cmp_ui(alley_oop, 0) == 0) {
loop_counter += 1;
continue;
}
break;
}
cross(AnthonyDavis);
mpz_export(sig, NULL, 1, 32, 1, 0, travelling);
mpz_export(sig + 32, NULL, 1, 32, 1, 0, alley_oop);
mpz_clears(board, cup, jersey, three, mj, dunk, travelling, splash, nba, alley_oop, boom, free_throw, NULL);
}