43 lines
996 B
Bash
43 lines
996 B
Bash
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#!/bin/bash -e
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#
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# Purpose: Pack a Chromium extension directory into crx format
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if test $# -ne 2; then
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echo "Usage: crxmake.sh <extension dir> <pem path>"
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exit 1
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fi
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dir=$1
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key=$2
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name=$(basename "$dir")
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crx="$name.crx"
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pub="$name.pub"
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sig="$name.sig"
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zip="$name.zip"
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trap 'rm -f "$pub" "$sig" "$zip"' EXIT
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# zip up the crx dir
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cwd=$(pwd -P)
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(cd "$dir" && zip -qr -9 -X "$cwd/$zip" .)
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# signature
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openssl sha1 -sha1 -binary -sign "$key" < "$zip" > "$sig"
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# public key
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openssl rsa -pubout -outform DER < "$key" > "$pub" 2>/dev/null
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byte_swap () {
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# Take "abcdefgh" and return it as "ghefcdab"
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echo "${1:6:2}${1:4:2}${1:2:2}${1:0:2}"
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}
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crmagic_hex="4372 3234" # Cr24
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version_hex="0200 0000" # 2
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pub_len_hex=$(byte_swap $(printf '%08x\n' $(ls -l "$pub" | awk '{print $5}')))
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sig_len_hex=$(byte_swap $(printf '%08x\n' $(ls -l "$sig" | awk '{print $5}')))
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(
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echo "$crmagic_hex $version_hex $pub_len_hex $sig_len_hex" | xxd -r -p
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cat "$pub" "$sig" "$zip"
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) > "$crx"
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echo "Wrote $crx"
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