144 lines
3.4 KiB
Bash
144 lines
3.4 KiB
Bash
#!/bin/sh
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# abuild-keygen - generate signing keys
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# Copyright (c) 2009 Natanael Copa <ncopa@alpinelinux.org>
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#
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# Distributed under GPL-2.0-only
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#
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program_version=@VERSION@
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sharedir=${ABUILD_SHAREDIR:-@sharedir@}
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SUDO="${SUDO-sudo}"
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if ! [ -f "$sharedir/functions.sh" ]; then
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echo "$sharedir/functions.sh: not found" >&2
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exit 1
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fi
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. "$sharedir/functions.sh"
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set -e
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# ask for privkey unless non-interactive mode
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# returns value in global $privkey
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get_privkey_file() {
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local emailaddr default_name
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emailaddr=${PACKAGER##*<}
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emailaddr=${emailaddr%%>*}
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# if PACKAGER does not contain a valid email address, then ask git
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if [ -z "$emailaddr" ] || [ "${emailaddr##*@}" = "$emailaddr" ]; then
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emailaddr=$(git config --get user.email 2>/dev/null || true)
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fi
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default_name="${emailaddr:-$USER}-$(printf "%x" $(date +%s))"
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privkey="$ABUILD_USERDIR/$default_name.rsa"
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if [ -z "$interactive" ]; then
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return 0
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fi
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msg "Generating public/private rsa key pair for abuild"
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echo -n "Enter file in which to save the key [$privkey]: "
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read line
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if [ -n "$line" ]; then
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privkey="$line"
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fi
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}
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do_keygen() {
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mkdir -p "$ABUILD_USERDIR"
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get_privkey_file
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pubkey="$privkey.pub"
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# generate the private key in a subshell with stricter umask
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(
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umask 0007
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openssl genrsa -out "$privkey" "$numbits"
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)
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openssl rsa -in "$privkey" -pubout -out "$pubkey"
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if [ -n "$install_pubkey" ]; then
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msg "Installing $pubkey to /etc/apk/keys..."
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$SUDO mkdir -p "${abuild_keygen_install_root}"/etc/apk/keys
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$SUDO cp ${interactive:+-i} "$pubkey" "${abuild_keygen_install_root}"/etc/apk/keys/
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else
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msg ""
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msg "You'll need to install $pubkey into "
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msg "/etc/apk/keys to be able to install packages and repositories signed with"
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msg "$privkey"
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fi
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if [ -n "$append_config" ]; then
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if [ -f "$ABUILD_USERCONF" ]; then
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# comment out the existing values
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sed -i -e 's/^PACKAGER_PRIVKEY=/\#&/' "$ABUILD_USERCONF"
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fi
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echo "PACKAGER_PRIVKEY=\"$privkey\"" >> "$ABUILD_USERCONF"
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else
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msg ""
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msg "You might want add following line to $ABUILD_USERCONF:"
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msg ""
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msg "PACKAGER_PRIVKEY=\"$privkey\""
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msg ""
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fi
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msg ""
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msg "Please remember to make a safe backup of your private key:"
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msg "$privkey"
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msg ""
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}
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usage() {
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cat >&2 <<-__EOF__
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$program $program_version - generate signing keys
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Usage: $program [-a|--append] [-i|--install] [-n]
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Options:
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-a, --append Set PACKAGER_PRIVKEY=<generated key> in
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$ABUILD_USERCONF
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-i, --install Install public key into /etc/apk/keys using sudo
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-n Non-interactive. Use defaults
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-b, --numbits [BITS] The size of the private key to generate in bits.
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-q, --quiet
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-h, --help Show this help
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The SUDO variable can be set to pick which tool can be used to
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elevate privileges, if it is not set it defaults to sudo.
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__EOF__
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}
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append_config=
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install_pubkey=
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interactive=1
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numbits=2048
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quiet=
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args=$(getopt -o ab:inqh --long append,numbits:,install,quiet,help -n "$program" -- "$@")
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if [ $? -ne 0 ]; then
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usage
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exit 2
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fi
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eval set -- "$args"
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while true; do
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case $1 in
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-a|--append) append_config=1;;
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-i|--install) install_pubkey=1;;
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-n) unset interactive ;;
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-b|--numbits) numbits="$2"; shift 1;;
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-q|--quiet) quiet=1;; # suppresses msg
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-h|--help) usage; exit;;
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--) shift; break;;
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*) exit 1;; # getopt error
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esac
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shift
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done
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if [ $# -ne 0 ]; then
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usage
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exit 2
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fi
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do_keygen
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