git / moonbite-core / contrib/verify-commits/gpg.sh · raw

#!/bin/sh# Copyright (c) 2014-2019 The Bitcoin Core developers# Distributed under the MIT software license, see the accompanying# file COPYING or http://www.opensource.org/licenses/mit-license.php.export LC_ALL=CINPUT=$(cat /dev/stdin)VALID=falseREVSIG=falseIFS=''if [ "$BITCOIN_VERIFY_COMMITS_ALLOW_SHA1" = 1 ]; then	GPG_RES="$(printf '%s\n' "$INPUT" | gpg --trust-model always "$@" 2>/dev/null)"else	# Note how we've disabled SHA1 with the --weak-digest option, disabling	# signatures - including selfsigs - that use SHA1. While you might think that	# collision attacks shouldn't be an issue as they'd be an attack on yourself,	# in fact because what's being signed is a commit object that's	# semi-deterministically generated by untrusted input (the pull-req) in theory	# an attacker could construct a pull-req that results in a commit object that	# they've created a collision for. Not the most likely attack, but preventing	# it is pretty easy so we do so as a "belt-and-suspenders" measure.	GPG_RES=""	for LINE in $(gpg --version); do		case "$LINE" in			"gpg (GnuPG) 1.4.1"*|"gpg (GnuPG) 2.0."*)				echo "Please upgrade to at least gpg 2.1.10 to check for weak signatures" > /dev/stderr				GPG_RES="$(printf '%s\n' "$INPUT" | gpg --trust-model always "$@" 2>/dev/null)"				;;			# We assume if you're running 2.1+, you're probably running 2.1.10+			# gpg will fail otherwise			# We assume if you're running 1.X, it is either 1.4.1X or 1.4.20+			# gpg will fail otherwise		esac	done	[ "$GPG_RES" = "" ] && GPG_RES="$(printf '%s\n' "$INPUT" | gpg --trust-model always --weak-digest sha1 "$@" 2>/dev/null)"fifor LINE in $GPG_RES; do	case "$LINE" in	"[GNUPG:] VALIDSIG "*)		while read KEY; do			[ "${LINE#?GNUPG:? VALIDSIG * * * * * * * * * }" = "$KEY" ] && VALID=true		done < ./contrib/verify-commits/trusted-keys		;;	"[GNUPG:] REVKEYSIG "*)		[ "$BITCOIN_VERIFY_COMMITS_ALLOW_REVSIG" != 1 ] && exit 1		REVSIG=true		GOODREVSIG="[GNUPG:] GOODSIG ${LINE#* * *}"		;;	"[GNUPG:] EXPKEYSIG "*)		[ "$BITCOIN_VERIFY_COMMITS_ALLOW_REVSIG" != 1 ] && exit 1		REVSIG=true		GOODREVSIG="[GNUPG:] GOODSIG ${LINE#* * *}"		;;	esacdoneif ! $VALID; then	exit 1fiif $VALID && $REVSIG; then	printf '%s\n' "$INPUT" | gpg --trust-model always "$@" 2>/dev/null | grep "^\[GNUPG:\] \(NEWSIG\|SIG_ID\|VALIDSIG\)"	echo "$GOODREVSIG"else	printf '%s\n' "$INPUT" | gpg --trust-model always "$@" 2>/dev/nullfi