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127 lines
3.0 KiB
127 lines
3.0 KiB
#!/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 $1 > /dev/null; then |
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return 1; |
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fi |
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if [ "$VERIFY_TREE" = 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 $1 | LANG=C sort); do |
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HASH=$(git cat-file blob $1:"$FILE" | sha512sum | { read FIRST OTHER; echo $FIRST; } ) |
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[ "$FILE_HASHES" != "" ] && FILE_HASHES="$FILE_HASHES"$'\n' |
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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 $NO_SHA1; then |
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return 0; |
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fi |
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break |
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done |
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if ! "$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" "$DO_CHECKOUT_TEST" 1 |
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RES=$? |
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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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