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Verify Tree-SHA512s in merge commits, enforce sigs are not SHA1

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This commit is contained in:
Matt Corallo 2017-02-27 14:13:39 -05:00
parent be908a69bf
commit d9c450ffb2
3 changed files with 73 additions and 3 deletions
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7
contrib/verify-commits/gpg.sh
View file

@ -8,7 +8,12 @@ VALID=false
REVSIG=false
IFS='
'
for LINE in $(echo "$INPUT" | gpg --trust-model always "$@" 2>/dev/null); do
if [ "$BITCOIN_VERIFY_COMMITS_ALLOW_SHA1" = 1 ]; then
GPG_RES="$(echo "$INPUT" | gpg --trust-model always "$@" 2>/dev/null)"
else
GPG_RES="$(echo "$INPUT" | gpg --trust-model always --weak-digest sha1 "$@" 2>/dev/null)"
fi
for LINE in $(echo "$GPG_RES"); do
case "$LINE" in
"[GNUPG:] VALIDSIG "*)
while read KEY; do

1
contrib/verify-commits/trusted-sha512-root-commit Normal file
View file

@ -0,0 +1 @@
b00ba6251f71fa1edaabdf809514e1bc3c67862e

68
contrib/verify-commits/verify-commits.sh
View file

@ -9,7 +9,10 @@
DIR=$(dirname "$0")
[ "/${DIR#/}" != "$DIR" ] && DIR=$(dirname "$(pwd)/$0")
echo "Using verify-commits data from ${DIR}"
VERIFIED_ROOT=$(cat "${DIR}/trusted-git-root")
VERIFIED_SHA512_ROOT=$(cat "${DIR}/trusted-sha512-root-commit")
REVSIG_ALLOWED=$(cat "${DIR}/allow-revsig-commits")
HAVE_FAILED=false
@ -17,18 +20,73 @@ IS_SIGNED () {
if [ $1 = $VERIFIED_ROOT ]; then
return 0;
fi
VERIFY_TREE=$2
NO_SHA1=$3
if [ $1 = $VERIFIED_SHA512_ROOT ]; then
if [ "$VERIFY_TREE" = "1" ]; then
echo "All Tree-SHA512s matched up to $VERIFIED_SHA512_ROOT" > /dev/stderr
fi
VERIFY_TREE=0
NO_SHA1=0
fi
if [ "$NO_SHA1" = "1" ]; then
export BITCOIN_VERIFY_COMMITS_ALLOW_SHA1=0
else
export BITCOIN_VERIFY_COMMITS_ALLOW_SHA1=1
fi
if [ "${REVSIG_ALLOWED#*$1}" != "$REVSIG_ALLOWED" ]; then
export BITCOIN_VERIFY_COMMITS_ALLOW_REVSIG=1
else
export BITCOIN_VERIFY_COMMITS_ALLOW_REVSIG=0
fi
if ! git -c "gpg.program=${DIR}/gpg.sh" verify-commit $1 > /dev/null 2>&1; then
return 1;
fi
if [ "$VERIFY_TREE" = 1 ]; then
IFS_CACHE="$IFS"
IFS='
'
for LINE in $(git ls-tree --full-tree -r $1); do
case "$LINE" in
"12"*)
echo "Repo contains symlinks" > /dev/stderr
IFS="$IFS_CACHE"
return 1
;;
esac
done
IFS="$IFS_CACHE"
FILE_HASHES=""
for FILE in $(git ls-tree --full-tree -r --name-only $1 | LANG=C sort); do
HASH=$(git cat-file blob $1:"$FILE" | sha512sum | { read FIRST OTHER; echo $FIRST; } )
[ "$FILE_HASHES" != "" ] && FILE_HASHES="$FILE_HASHES"$'\n'
FILE_HASHES="$FILE_HASHES$HASH $FILE"
done
HASH_MATCHES=0
MSG="$(git show -s --format=format:%B $1 | tail -n1)"
case "$MSG -" in
"Tree-SHA512: $(echo "$FILE_HASHES" | sha512sum)")
HASH_MATCHES=1;;
esac
if [ "$HASH_MATCHES" = "0" ]; then
echo "Tree-SHA512 did not match for commit $1" > /dev/stderr
HAVE_FAILED=true
return 1
fi
fi
local PARENTS
PARENTS=$(git show -s --format=format:%P $1)
for PARENT in $PARENTS; do
if IS_SIGNED $PARENT; then
if IS_SIGNED $PARENT $VERIFY_TREE $NO_SHA1; then
return 0;
fi
break
@ -50,7 +108,13 @@ else
TEST_COMMIT="$1"
fi
IS_SIGNED "$TEST_COMMIT"
DO_CHECKOUT_TEST=0
if [ x"$2" = "x--tree-checks" ]; then
DO_CHECKOUT_TEST=1
fi
IS_SIGNED "$TEST_COMMIT" "$DO_CHECKOUT_TEST" 1
RES=$?
if [ "$RES" = 1 ]; then
if ! "$HAVE_FAILED"; then