CPU miner added, goes from A-Z, looping, and keeps changing LSBs until it checks every possibility

aad_coin_miner_cpu.c

@@ -0,0 +1,163 @@
+//
+// Arquiteturas de Alto Desempenho 2025/2026
+//
+// DETI Coin Miner - CPU implementation
+//
+
+#include <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include "aad_data_types.h"
+#include "aad_utilities.h"
+#include "aad_sha1_cpu.h"
+#include "aad_vault.h"
+
+static volatile int keep_running = 1;
+
+void signal_handler(int signum)
+{
+  (void)signum;
+  keep_running = 0;
+}
+
+//
+// check if a hash starts with aad20250
+//
+static int is_valid_coin(u32_t *hash)
+{
+  return hash[0] == 0xAAD20250u;
+}
+
+//
+// mine DETI coins using the CPU (no SIMD)
+//
+static void mine_coins_cpu(u64_t max_attempts)
+{
+  u32_t coin[14];
+  u32_t hash[5];
+  u64_t attempts = 0;
+  u32_t coins_found = 0;
+
+  // Initialize coin template: "DETI coin 2 " + variable content + "\n\x80"
+  memset(coin, 0, sizeof(coin));
+
+  // "DETI coin 2 " at the beginning
+  ((u08_t *)coin)[0x0 ^ 3] = 'D';
+  ((u08_t *)coin)[0x1 ^ 3] = 'E';
+  ((u08_t *)coin)[0x2 ^ 3] = 'T';
+  ((u08_t *)coin)[0x3 ^ 3] = 'I';
+  ((u08_t *)coin)[0x4 ^ 3] = ' ';
+  ((u08_t *)coin)[0x5 ^ 3] = 'c';
+  ((u08_t *)coin)[0x6 ^ 3] = 'o';
+  ((u08_t *)coin)[0x7 ^ 3] = 'i';
+  ((u08_t *)coin)[0x8 ^ 3] = 'n';
+  ((u08_t *)coin)[0x9 ^ 3] = ' ';
+  ((u08_t *)coin)[0xa ^ 3] = '2';
+  ((u08_t *)coin)[0xb ^ 3] = ' ';
+
+  // Newline at position 54, padding at 55
+  ((u08_t *)coin)[0x36 ^ 3] = '\n';
+  ((u08_t *)coin)[0x37 ^ 3] = 0x80;
+
+  // Variable part: positions 12-53 (42 bytes)
+  // Initialize with a pattern
+  for(int i = 12; i < 54; i++)
+    ((u08_t *)coin)[i ^ 3] = 'A' + (i - 12) % 26;
+
+  printf("Mining DETI coins using CPU (no SIMD)...\n");
+  printf("Press Ctrl+C to stop\n\n");
+
+  time_measurement();
+  time_measurement();
+  double start_time = wall_time_delta();
+
+  while(keep_running && (max_attempts == 0 || attempts < max_attempts))
+  {
+    // Compute SHA1 hash
+    sha1(coin, hash);
+    attempts++;
+
+    // Check if it's a valid coin
+    if(is_valid_coin(hash))
+    {
+      coins_found++;
+      printf("COIN FOUND! (attempt %llu)\n", (unsigned long long)attempts);
+      save_coin(coin);
+    }
+
+    // Update the variable part (simple counter-based approach)
+    // Increment from the end to beginning
+    int pos = 53;
+    while(pos >= 12)
+    {
+      u08_t *byte = &((u08_t *)coin)[pos ^ 3];
+      if(*byte == '\n' || *byte == 0x80)
+        *byte = 32; // Start from space
+
+      (*byte)++;
+
+      // Skip newline character
+      if(*byte == '\n')
+        (*byte)++;
+
+      // Wrap around at 127 (printable ASCII limit)
+      if(*byte >= 127)
+      {
+        *byte = 32; // Reset to space
+        pos--; // Carry to next position
+      }
+      else
+      {
+        break; // No carry needed
+      }
+    }
+
+    // Print progress every 1M attempts
+    if(attempts % 1000000 == 0)
+    {
+      time_measurement();
+      double current_time = wall_time_delta() - start_time;
+      double rate = attempts / current_time;
+      printf("Attempts: %llu, Rate: %.2f MH/s, Coins: %u\n",
+             (unsigned long long)attempts, rate / 1e6, coins_found);
+    }
+  }
+
+  time_measurement();
+  double total_time = wall_time_delta() - start_time;
+
+  printf("\n=== Mining Statistics ===\n");
+  printf("Total attempts: %llu\n", (unsigned long long)attempts);
+  printf("Total time: %.2f seconds\n", total_time);
+  printf("Average rate: %.2f attempts/second\n", attempts / total_time);
+  printf("Coins found: %u\n", coins_found);
+
+  // Save any remaining coins
+  save_coin(NULL);
+}
+
+int main(int argc, char *argv[])
+{
+  u64_t max_attempts = 0;
+
+  // Set up signal handler for graceful shutdown
+  signal(SIGINT, signal_handler);
+
+  if(argc > 1)
+  {
+    max_attempts = strtoull(argv[1], NULL, 10);
+    printf("Will perform %llu attempts\n", (unsigned long long)max_attempts);
+  }
+  else
+  {
+    printf("Usage: %s [max_attempts]\n", argv[0]);
+    printf("Running indefinitely until Ctrl+C...\n");
+  }
+
+  mine_coins_cpu(max_attempts);
+
+  return 0;
+}
+