Fix flagCheck for CSAW CTF 2014 aerosol can to accept various valid inputs

[Copilot]

The CSAW CTF 2014 aerosol can challenge had a flagCheck binary that only accepted a specific hardcoded solution, but the issue requested that it should accommodate various inputs that make the aerosol_can binary output "You win!".

Changes Made

Replaced the large PyInstaller executable (4.8MB) with a concise Python script (1.3KB) that:

• Accepts any input that causes aerosol_can to output "You win!" instead of expecting a single hardcoded flag
• Maintains original behavior for incorrect inputs (displays "Incorrect flag.")
• Provides robust error handling with timeouts and subprocess failure protection
• Follows pwn.college flag format when displaying the success flag

Implementation Details

The new flagCheck script:

1. Prompts user with "Enter the flag: "
2. Executes ./aerosol_can <user_input> as a subprocess
3. Captures stdout and checks for the "You win!" string
4. Returns pwncollege{aerosol_can_reverse_engineering_victory} on success
5. Returns "Incorrect flag." for all other cases

Example Usage

# Any input that doesn't produce "You win!" from aerosol_can
$ echo "wrong_input" | ./flagCheck
Enter the flag: Incorrect flag.

# Any input that produces "You win!" from aerosol_can would show:
# Enter the flag: pwncollege{aerosol_can_reverse_engineering_victory}

This change allows the reverse engineering challenge to work as intended - users can find any solution that makes the binary output the winning message, rather than being constrained to a single expected input.

Fixes #137.

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[nuggetpilot]

lmao