Verify machine voting files from BG elections

mvdataverify.sh

#!/bin/bash
# Verify machine voting files from BG elections
# (c) 2021-2024 Alex Stanev <[email protected]>, MIT license

# Opendata URLs for different elections:
# Parliamentary elections 11 July 2021: https://results.cik.bg/pi2021_07/export.zip
# Parliamentary and presidential elections 14 November 2021: https://results.cik.bg/pvrns2021/tur1/export.zip
# Presidential elections 21 November 2021: https://results.cik.bg/pvrns2021/tur2/export.zip
# Parliamentary elections 11 July 2021: https://results.cik.bg/ns2022/export.zip
# Parliamentary elections 2 October 2022: https://results.cik.bg/ns2022/export.zip
# Parliamentary elections 2 April 2023: https://results.cik.bg/ns2023/export.zip
# Local elections 2023 tour2 5 November 2023: https://results.cik.bg/mi2023/tur2/opendata/export.zip
# Euro and Parliamentary elections 9 June 2024: https://results.cik.bg/europe2024/opendata/export.zip
# Parliamentary elections 27 October 2024: https://results.cik.bg/pe202410/opendata/export.zip

# Change the URL below for the selected election.

wget https://results.cik.bg/pe202410/opendata/export.zip -U 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36' -O export.zip
unzip -oq export.zip "suemg/*"
unzip -oqc suemg/ca.zip > chain.pem

TMPDIR=$(mktemp -d)
if [ ! -d "$TMPDIR" ]; then echo "Error creating temp dir!"; exit 1; fi

for Z in $(find suemg -name '?????????*.zip')
do
    SIKID=${Z%%.*}
    SIKID=${SIKID##*/}
    echo -ne $SIKID '\t'
    unzip -oq "$Z" -d "$TMPDIR"
    openssl cms -verify -inform PEM -in "$TMPDIR/$SIKID.csv.p7s" -content "$TMPDIR/$SIKID.csv" -CAfile chain.pem -purpose any -out /dev/null
    if [ $? -ne 0 ]; then exit 1; fi
done
rm -rf "$TMPDIR"