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8a436ec36a
b3ec305Fix bashisms in verify-commits and always check top commit's tree (Matt Corallo)f20e664Check gpg version before setting --weak-digest (Matt Corallo) Tree-SHA512: f87247008ae6a265e3fd371f00aec0e84f1feb713bf5859eab139a88a4e205e1f26de7b510bcc2c3ab538d5443978a48ec920d25b52b9601e625d198fa2d725f
128 lines
3.1 KiB
Bash
128 lines
3.1 KiB
Bash
#!/bin/sh
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# Copyright (c) 2014-2016 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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# Not technically POSIX-compliant due to use of "local", but almost every
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# shell anyone uses today supports it, so its probably fine
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DIR=$(dirname "$0")
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[ "/${DIR#/}" != "$DIR" ] && DIR=$(dirname "$(pwd)/$0")
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echo "Using verify-commits data from ${DIR}"
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VERIFIED_ROOT=$(cat "${DIR}/trusted-git-root")
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VERIFIED_SHA512_ROOT=$(cat "${DIR}/trusted-sha512-root-commit")
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REVSIG_ALLOWED=$(cat "${DIR}/allow-revsig-commits")
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HAVE_FAILED=false
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IS_SIGNED () {
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if [ $1 = $VERIFIED_ROOT ]; then
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return 0;
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fi
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VERIFY_TREE=$2
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NO_SHA1=$3
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if [ $1 = $VERIFIED_SHA512_ROOT ]; then
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if [ "$VERIFY_TREE" = "1" ]; then
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echo "All Tree-SHA512s matched up to $VERIFIED_SHA512_ROOT" > /dev/stderr
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fi
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VERIFY_TREE=0
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NO_SHA1=0
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fi
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if [ "$NO_SHA1" = "1" ]; then
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export BITCOIN_VERIFY_COMMITS_ALLOW_SHA1=0
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else
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export BITCOIN_VERIFY_COMMITS_ALLOW_SHA1=1
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fi
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if [ "${REVSIG_ALLOWED#*$1}" != "$REVSIG_ALLOWED" ]; then
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export BITCOIN_VERIFY_COMMITS_ALLOW_REVSIG=1
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else
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export BITCOIN_VERIFY_COMMITS_ALLOW_REVSIG=0
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fi
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if ! git -c "gpg.program=${DIR}/gpg.sh" verify-commit $1 > /dev/null; then
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return 1;
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fi
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# We set $4 to 1 on the first call, always verifying the top of the tree
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if [ "$VERIFY_TREE" = 1 -o "$4" = "1" ]; then
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IFS_CACHE="$IFS"
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IFS='
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'
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for LINE in $(git ls-tree --full-tree -r $1); do
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case "$LINE" in
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"12"*)
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echo "Repo contains symlinks" > /dev/stderr
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IFS="$IFS_CACHE"
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return 1
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;;
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esac
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done
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IFS="$IFS_CACHE"
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FILE_HASHES=""
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for FILE in $(git ls-tree --full-tree -r --name-only $1 | LC_ALL=C sort); do
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HASH=$(git cat-file blob $1:"$FILE" | sha512sum | { read FIRST OTHER; echo $FIRST; } )
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[ "$FILE_HASHES" != "" ] && FILE_HASHES="$FILE_HASHES"'
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'
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FILE_HASHES="$FILE_HASHES$HASH $FILE"
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done
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HASH_MATCHES=0
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MSG="$(git show -s --format=format:%B $1 | tail -n1)"
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case "$MSG -" in
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"Tree-SHA512: $(echo "$FILE_HASHES" | sha512sum)")
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HASH_MATCHES=1;;
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esac
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if [ "$HASH_MATCHES" = "0" ]; then
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echo "Tree-SHA512 did not match for commit $1" > /dev/stderr
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HAVE_FAILED=true
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return 1
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fi
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fi
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local PARENTS
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PARENTS=$(git show -s --format=format:%P $1)
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for PARENT in $PARENTS; do
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if IS_SIGNED $PARENT $VERIFY_TREE $NO_SHA1 0; then
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return 0;
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fi
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done
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if ! "$HAVE_FAILED"; then
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echo "No parent of $1 was signed with a trusted key!" > /dev/stderr
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echo "Parents are:" > /dev/stderr
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for PARENT in $PARENTS; do
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git show -s $PARENT > /dev/stderr
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done
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HAVE_FAILED=true
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fi
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return 1;
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}
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if [ x"$1" = "x" ]; then
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TEST_COMMIT="HEAD"
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else
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TEST_COMMIT="$1"
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fi
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DO_CHECKOUT_TEST=0
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if [ x"$2" = "x--tree-checks" ]; then
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DO_CHECKOUT_TEST=1
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fi
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IS_SIGNED "$TEST_COMMIT" "$DO_CHECKOUT_TEST" 1 1
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RES=$?
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if [ "$RES" = 1 ]; then
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if ! "$HAVE_FAILED"; then
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echo "$TEST_COMMIT was not signed with a trusted key!"
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fi
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else
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echo "There is a valid path from $TEST_COMMIT to $VERIFIED_ROOT where all commits are signed!"
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fi
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exit $RES
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