ADD exercices week 1

02-Easy1/code.c

@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+#include <sys/types.h>
+
+ulong SECRETPASSWORD;
+
+int main(int param_1, int *param_2) {
+  char* foo = "Hello";
+  uint8_t string_equality;
+  uint8_t output_value;
+  size_t input_length;
+  uint8_t local_20;
+  uint8_t itr;
+
+  local_20 = 1;
+  if (true /*param_1 == 2*/) {
+
+    itr = 0;
+    while( true ) {
+      //input_length = strlen((char *)param_2[1]); // 16
+      input_length = strlen(foo); // 16
+      if (16 <= itr) break;
+      local_20 = (local_20 * 3) % 257;
+      itr = itr + 1;
+    }
+    string_equality = strncmp(
+      // SECRETPASSWORD = 00402e82
+      // SECRETPASSWORD + ( (249+226)%257 ) * 8
+      // SECRETPASSWORD + (475%257) * 8
+      // SECRETPASSWORD + 218 * 8
+      // SECRETPASSWORD + 1744
+      *(char **)(SECRETPASSWORD + (ulong)((local_20 + 226) % 257) * 8),
+      foo,
+      16
+    );
+    // => DwMxRPg1cjmVTHdV
+    if (string_equality == 0) {
+      fprintf(stderr,"\nCongratulations ! The right password is indeed %s :-)\n\n",param_2[1]);
+      output_value = 0;
+    }
+    else {
+      fwrite("\nWrong password ! Try again...\n\n", 1, 32, stderr);
+      output_value = 1;
+    }
+  }
+  else {
+    fwrite("\nMSE-SRE Challenge E1 --- Enjoy !\n", 1, 34, stderr);
+    fprintf(stderr, "\nUsage: %s <password>\n\n", *param_2);
+    output_value = 1;
+  }
+  return output_value;
+}
+