60 lines
1.5 KiB
Bash
Executable File
60 lines
1.5 KiB
Bash
Executable File
# Purpose: Pack a Chromium extension directory into crx format
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if test $# -ne 1; then
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echo "Usage: crxmake.sh <extension dir>"
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exit 1
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fi
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dir=$1
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name=$(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="$name.zip"
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tosign="$name.presig"
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binary_crx_id="$name.crxid"
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trap 'rm -f "$pub" "$sig" "$zip" "$tosign" "$binary_crx_id"' 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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echo "${EXTENSION_CRX_KEY}" > /tmp/extension.pem
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#extract crx id
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openssl rsa -in /tmp/extension.pem -pubout -outform der | openssl dgst -sha256 -binary -out "$binary_crx_id"
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truncate -s 16 "$binary_crx_id"
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#generate file to sign
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(
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# echo "$crmagic_hex $version_hex $header_length $pub_len_hex $sig_len_hex"
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printf "CRX3 SignedData"
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echo "00 12 00 00 00 0A 10" | xxd -r -p
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cat "$binary_crx_id" "$zip"
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) > "$tosign"
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# signature
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openssl dgst -sha256 -binary -sign /tmp/extension.pem < "$tosign" > "$sig"
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# public key
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openssl rsa -pubout -outform DER < /tmp/extension.pem > "$pub" 2>/dev/null
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crmagic_hex="43 72 32 34" # Cr24
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version_hex="03 00 00 00" # 3
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header_length="45 02 00 00"
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header_chunk_1="12 AC 04 0A A6 02"
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header_chunk_2="12 80 02"
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header_chunk_3="82 F1 04 12 0A 10"
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(
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echo "$crmagic_hex $version_hex $header_length $header_chunk_1" | xxd -r -p
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cat "$pub"
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echo "$header_chunk_2" | xxd -r -p
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cat "$sig"
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echo "$header_chunk_3" | xxd -r -p
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cat "$binary_crx_id" "$zip"
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) > "$crx"
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echo -e "Wrote $crx. Extension id: "
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cat "$binary_crx_id" | xxd -p -l 16 | tr '0123456789abcdef' 'abcdefghijklmnop'
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