ADD exercices week 2

02-Easy2/smallGenerator.c

@@ -0,0 +1,95 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <time.h>
+
+const uint16_t NBR_PASSWORDS_REQUESTED = 100;
+
+bool hash(char* str){
+    char* str1 = str;
+    char* str2 = str;
+    uint32_t foo = 0x56253667;
+
+    do {
+        str2 = str1 + 4;
+        foo = foo ^ ((uint8_t)*str1 << 24 | (uint8_t)str1[1] << 16 | (uint8_t)str1[2] << 8 | (uint8_t)str1[3]);
+        str1 = str2;
+    } while (str + 12 != str2);
+    return foo == 0x3c3e386b ? true : false;
+}
+
+const char list[] = {
+    'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
+    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
+    '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+    '/', '+'
+};
+char give_char(uint8_t index){
+    if (index >= sizeof(list)) {
+        printf("Error: Index out of bounds, max %zu\n", sizeof(list));
+        exit(1);
+    }
+    return list[index];
+}
+
+
+int main(int argc, char *argv[]) {
+    srand(time(NULL));
+
+    // seed = 0x56253667;
+    // answer = 0x3c3e386b;
+    uint8_t mdw[4] = {0x6a, 0x1b, 0x0e, 0x0c};
+
+    char password[13];
+    const uint8_t max_char = sizeof(list);
+
+    password[0] = 'r';
+    password[1] = 'e';
+    password[2] = 'm';
+    password[3] = 'i';
+    uint8_t foo[4];
+
+    for(uint16_t n = 0; n < NBR_PASSWORDS_REQUESTED; n++) {
+
+        for(uint8_t i = 0; i < 4; i++) {
+            foo[i] = password[i] ^ mdw[i];
+        }
+        for(uint8_t i = 0; i < 4; i++) {
+            // password[i] = give_char(rand()%max_char);
+            uint32_t counter = 0;
+            // for(uint8_t c2 = 0; c2 < max_char; c2++) {
+
+            // }
+            do{
+                password[i+4] = list[rand()%max_char];
+                for(uint8_t j = 0; j < max_char; j++) {
+                    password[i+8] = list[j];
+                    if( ((uint8_t)password[i+4] ^ (uint8_t)password[i+8]) == foo[i]) break;
+                }
+                counter++;
+            } while (( (uint8_t)password[i+4] ^ (uint8_t)password[i+8] ) != foo[i]);
+            //printf("Counter: %zu\n", counter);
+        }
+        password[12] = '\0';
+        if (hash(password)) {
+            printf("%s\n", password);
+        } else {
+            printf("Fuck\n");
+        }
+
+    }
+}
+
+
+// l96n hRI/ npqM 471M
+//
+//
+// 56 25 36 67
+// -----------
+// 6C 39 36 6E
+// 68 52 49 2F
+// 6E 70 71 4D
+// -----------
+// 3c 3e 38 6b