mirror of
https://github.com/dashpay/dash.git
synced 2024-12-26 12:32:48 +01:00
3979f24d3f
9e2e5626dabb7208dafedcc9904940b666be1c3b Fix CVE-2018-12356 by hardening the regex. (Loganaden Velvindron) Pull request description: Detailed write-up here: https://neopg.io/blog/pass-signature-spoof/ Tree-SHA512: 2020474ff4c7b5e7f1bea932c63da62aca48d3dc6dcd04507afefad6c40f2977ed2d2916defe2e8e7936a2d498125c578077870147954a7af9b29b823cbb0b10
65 lines
2.4 KiB
Bash
Executable File
65 lines
2.4 KiB
Bash
Executable File
#!/bin/sh
|
|
# Copyright (c) 2014-2016 The Bitcoin Core developers
|
|
# Distributed under the MIT software license, see the accompanying
|
|
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
|
|
INPUT=$(cat /dev/stdin)
|
|
VALID=false
|
|
REVSIG=false
|
|
IFS='
|
|
'
|
|
if [ "$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)"
|
|
fi
|
|
for LINE in $(echo "$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#* * *}"
|
|
;;
|
|
esac
|
|
done
|
|
if ! $VALID; then
|
|
exit 1
|
|
fi
|
|
if $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/null
|
|
fi
|