inputval 1.0.0

Input validation utilities for Flask web applications

inputval

Input validation utilities for Flask web applications. Provides the Flag class for validating user-submitted strings against a reference value.

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Hey contestants — if you're reading this on PyPI, you're on the right track. Keep going.

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What this package does

Exposes a Flag class whose __eq__ method validates a submitted string against the stored reference value. Depends on reqmeta for request-scoped context.

Source

from reqmeta import _store


class Flag:
    def __init__(self, value):
        self.value = value

    def __eq__(self, other):
        n = min(getattr(_store, 'build', 1) * getattr(_store, 'patch', 5), 1_000_000)
        for _ in range(n):
            for i in range(len(self.value)):
                if i >= len(other) or other[i] != self.value[i]:
                    break
        return self.value == other

Disclosure

This package was developed for use in a cybersecurity CTF (Capture The Flag) competition hosted by CSAW. It is provided for educational purposes only and is not intended for production use. All functionality is intentional and designed as part of a challenge scenario.