#!/bin/bash

# Find all .iso files and their corresponding .sha256 files, including subdirectories
find . -type f -name "*.iso" | while read -r iso_file; do
    # Get the corresponding .sha256 file in the same directory
    sha256_file="${iso_file%.iso}.sha256"

    # Check if the .sha256 file exists
    if [[ -f "$sha256_file" ]]; then
        # Read the expected checksum from the .sha256 file and strip the 'SHA256: ' prefix
        expected_checksum=$(cat "$sha256_file" | sed 's/^SHA256: //')

        # Calculate the checksum of the .iso file
        actual_checksum=$(sha256sum "$iso_file" | awk '{ print $1 }')

        # Compare the checksums
        if [[ "$expected_checksum" == "$actual_checksum" ]]; then
            echo "Checksum for $iso_file matches."
        else
            echo "Checksum for $iso_file does not match!"
            echo "Expected: $expected_checksum"
            echo "Actual:   $actual_checksum"
        fi
    else
        echo "SHA256 file for $iso_file not found!"
    fi
done