feat(pwn/srand): 添加附件源码

challenges/pwn/srand/build/src/Makefile

@@ -0,0 +1,12 @@
+CC = gcc
+CFLAGS = -Wall -Wextra -Wpedantic -no-pie -m64
+
+TARGET = game
+
+all: $(TARGET)
+
+$(TARGET): $(TARGET).c
+	$(CC) $(CFLAGS) -o $@ $<
+
+clean:
+	rm -f $(TARGET)

challenges/pwn/srand/build/src/game.c

@@ -0,0 +1,53 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+#define MAX_NUMBER 99999
+
+void init() {
+    setvbuf(stdin, NULL, _IONBF, 0);
+    setvbuf(stdout, NULL, _IONBF, 0);
+    setvbuf(stderr, NULL, _IONBF, 0);
+}
+
+void banner() {
+    printf(" ___  *  *  **  **  ___  ____  ____ \n");
+    printf("/ **)( \\/ )(  )(  )/ **)(_  *)( *__)\n");
+    printf("\\__ \\ \\  /  )(__)(( (__   )(   )__) \n");
+    printf("(___/  \\/  (______)\\___) (__) (__) \n");
+    printf("\n");
+    printf("Welcome to the SVUCTF HELLOWORLD 2024!\n");
+    printf("\n");
+}
+
+void game() {
+    int secret_number = rand() % MAX_NUMBER + 1;
+    int guess;
+
+    printf("I've thought of a number between 1 and %d.\n", MAX_NUMBER);
+    printf("You have only one chance to guess this number. Good luck!\n\n");
+    printf("Please enter your guess: ");
+
+    if (scanf("%d", &guess) != 1) {
+        printf("Invalid input, game over.\n");
+        return;
+    }
+
+    if (guess == secret_number) {
+        printf("\nCongratulations! You've guessed the number %d!\n",
+               secret_number);
+        system("/bin/sh");
+    } else {
+        printf(
+            "\nSorry, you didn't guess correctly. The right number was %d.\n",
+            secret_number);
+    }
+}
+
+int main() {
+    srand(time(NULL));
+    init();
+    banner();
+    game();
+    return 0;
+}