forked from TrueCloudLab/tzhash
39 lines
929 B
Bash
39 lines
929 B
Bash
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#!/usr/bin/env bash
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#set -x
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BLOCK_SIZE=${1:-100M} # 100Mb by default
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TMPDIR="${TMPDIR:-$(mktemp -d)}"
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OUT="${OUT:-"${TMPDIR}/bighash"}"
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echo "Preparing big file at ${OUT}..."
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dd if=/dev/urandom of="$OUT" bs="$BLOCK_SIZE" count=1
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echo "Make 4 smaller parts from ${OUT}..."
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split -dn 4 "${OUT}" "${TMPDIR}/"
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echo -n "Big file hash: "
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TZALL=$(./bin/tzsum -impl avx2 -name "${OUT}" | awk '{print $1}')
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echo "${TZALL}"
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for i in $(seq -f "%02g" 0 3)
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do
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echo -n "Part ${i} hash: "
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PART=$(./bin/tzsum -impl avx2 -name "${TMPDIR}/${i}" | awk '{print $1}')
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echo "${PART}" | tee -a "${TMPDIR}/part.hashes"
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done
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echo -n "Cumulative: "
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TZCUM=$(./bin/homo -concat -file "${TMPDIR}/part.hashes")
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echo "${TZCUM}"
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if [[ "$TZCUM" == "$TZALL" ]]; then
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echo "Original and cumulative hashes are equal!"
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else
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echo "Original and cumulative hashes are NOT equal!"
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fi
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echo -ne "Cleaning up .. "
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rm -rf "${TMPDIR}"
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echo "Done!"
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