First CTFs

BOF/03_tiny_escape_room/main.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+void setup() {
+    setvbuf(stdin, NULL, _IONBF, 0);
+    setvbuf(stdout, NULL, _IONBF, 0);
+    setvbuf(stderr, NULL, _IONBF, 0);
+}
+
+void win(int arg1, int arg2) {
+    if (arg1 == 0xdeadbeef && arg2 == 0xcafebabe) {
+        puts("Door unlocked!");
+        system("/bin/sh");
+    } else {
+        printf("Wrong keys: 0x%x, 0x%x\n", arg1, arg2);
+    }
+}
+
+void gadgets() {
+    __asm__("pop %rdi; ret");
+    __asm__("pop %rsi; ret");
+}
+
+void vuln() {
+    char buffer[64];
+    puts("Welcome to the tiny escape room!");
+    puts("Two magic keys open the door.");
+    puts("keys?");
+    gets(buffer);
+}
+
+int main() {
+    setup();
+    vuln();
+    return 0;
+}