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How to Mock Image Signing Cost in Python

Create a deterministic mock signing cost calculator that predicts resource usage for image signatures before real signing infrastructure is staged.

mock signing cost-model

Python

import math
import struct


def sign_image_cost(image_signature: bytes) -> int:
    """Deterministic mock signing cost based on image signature bytes."""
    if not image_signature:
        raise ValueError("Empty image signature")
    digest = 0
    for byte in image_signature:
        digest = (digest * 31 + byte) &…

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