Fixes for issues reported by shellcheck and gcc static analyzer

Upstream commits: 3d770c6, 262d98f
This commit is contained in:
Sergio Correia 2021-05-20 11:00:30 -03:00
parent 0314c2e7df
commit e73125735d
3 changed files with 192 additions and 1 deletions

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@ -0,0 +1,155 @@
From 0b0b1ef7244433cde737cd65d07930efd9667ed1 Mon Sep 17 00:00:00 2001
From: Sergio Correia <scorreia@redhat.com>
Date: Thu, 20 May 2021 10:21:21 -0300
Subject: [PATCH 1/2] Fix issues reported by shellcheck
Additionally, improve testing of these scripts.
---
src/tang-show-keys | 5 ++---
src/tangd-keygen | 17 ++++++++++-------
src/tangd-rotate-keys | 6 +++---
tests/adv | 20 ++++++++++++++++++++
tests/helpers | 15 +++++++++++++++
5 files changed, 50 insertions(+), 13 deletions(-)
diff --git a/src/tang-show-keys b/src/tang-show-keys
index 689e4df..0c33c3a 100755
--- a/src/tang-show-keys
+++ b/src/tang-show-keys
@@ -27,10 +27,9 @@ fi
port=${1-80}
-adv=$(curl -sSf localhost:$port/adv)
+adv=$(curl -sSf "localhost:$port/adv")
THP_DEFAULT_HASH=S256 # SHA-256.
-echo $adv \
- | jose fmt -j- -g payload -y -o- \
+jose fmt --json "${adv}" -g payload -y -o- \
| jose jwk use -i- -r -u verify -o- \
| jose jwk thp -i- -a "${THP_DEFAULT_HASH}"
diff --git a/src/tangd-keygen b/src/tangd-keygen
index 7a9adaf..f37121f 100755
--- a/src/tangd-keygen
+++ b/src/tangd-keygen
@@ -18,20 +18,23 @@
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
-trap 'exit' ERR
+set -e
-if [ $# -ne 1 -a $# -ne 3 ] || [ ! -d "$1" ]; then
+usage() {
echo "Usage: $0 <jwkdir> [<sig> <exc>]" >&2
exit 1
-fi
+}
+
+[ $# -ne 1 ] && [ $# -ne 3 ] && usage
+[ -d "$1" ] || usage
[ $# -eq 3 ] && sig=$2 && exc=$3
THP_DEFAULT_HASH=S256 # SHA-256.
-jwe=`jose jwk gen -i '{"alg":"ES512"}'`
+jwe=$(jose jwk gen -i '{"alg":"ES512"}')
[ -z "$sig" ] && sig=$(echo "$jwe" | jose jwk thp -i- -a "${THP_DEFAULT_HASH}")
-echo "$jwe" > $1/$sig.jwk
+echo "$jwe" > "$1/$sig.jwk"
-jwe=`jose jwk gen -i '{"alg":"ECMR"}'`
+jwe=$(jose jwk gen -i '{"alg":"ECMR"}')
[ -z "$exc" ] && exc=$(echo "$jwe" | jose jwk thp -i- -a "${THP_DEFAULT_HASH}")
-echo "$jwe" > $1/$exc.jwk
+echo "$jwe" > "$1/$exc.jwk"
diff --git a/src/tangd-rotate-keys b/src/tangd-rotate-keys
index 9d38bb5..a095a91 100755
--- a/src/tangd-rotate-keys
+++ b/src/tangd-rotate-keys
@@ -21,7 +21,7 @@
SUMMARY="Perform rotation of tang keys"
usage() {
- local _ret="${1:-1}"
+ _ret="${1:-1}"
exec >&2
echo "Usage: ${0} [-h] [-v] -d <KEYDIR>"
echo
@@ -37,8 +37,8 @@ usage() {
}
log() {
- local _msg="${1}"
- local _verbose="${2:-}"
+ _msg="${1}"
+ _verbose="${2:-}"
[ -z "${_verbose}" ] && return 0
echo "${_msg}" >&2
}
diff --git a/tests/adv b/tests/adv
index 490d4d1..4c8bc97 100755
--- a/tests/adv
+++ b/tests/adv
@@ -93,6 +93,9 @@ fetch /adv
# Lets's now test with multiple pairs of keys.
for i in 1 2 3 4 5 6 7 8 9; do
tangd-keygen "${TMP}"/db other-sig-${i} other-exc-${i}
+ # Make sure the requested keys exist and are valid.
+ validate_sig "${TMP}/db/other-sig-${i}.jwk"
+ validate_exc "${TMP}/db/other-exc-${i}.jwk"
done
# Verify the advertisement is correct.
@@ -104,3 +107,20 @@ for jwk in "${TMP}"/db/other-sig-*.jwk; do
fetch /adv/"$(jose jwk thp -a "${alg}" -i "${jwk}")" | ver "${jwk}"
done
done
+
+# Now let's test keys rotation.
+tangd-rotate-keys -d "${TMP}/db"
+for i in 1 2 3 4 5 6 7 8 9; do
+ # Make sure keys were excluded from advertisement.
+ validate_sig "${TMP}/db/.other-sig-${i}.jwk"
+ validate_exc "${TMP}/db/.other-exc-${i}.jwk"
+done
+
+# And test also that we have valid keys after rotation.
+thp=
+for jwk in "${TMP}"/db/*.jwk; do
+ validate_sig "${jwk}" && thp="$(jose jwk thp -a "${THP_DEFAULT_HASH}" \
+ -i "${jwk}")"
+done
+[ -z "${thp}" ] && die "There should be valid keys after rotation"
+test "$(tang-show-keys $PORT)" = "${thp}"
diff --git a/tests/helpers b/tests/helpers
index af122ab..7ce54d7 100755
--- a/tests/helpers
+++ b/tests/helpers
@@ -56,7 +56,22 @@ validate() {
fi
}
+validate_sig() {
+ jose fmt --json "${1}" --output=- | jose jwk use --input=- --required \
+ --use verify 2>/dev/null
+}
+
+validate_exc() {
+ jose fmt --json "${1}" --output=- | jose jwk use --input=- --required \
+ --use deriveKey 2>/dev/null
+}
+
sanity_check() {
# Skip test if socat is not available.
[ -n "${SOCAT}" ] || exit 77
}
+
+die() {
+ echo "${1}" >&2
+ exit 1
+}
--
2.31.1

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@ -0,0 +1,29 @@
From af3b3835bcdb7e2d7a4f14e077fecb5e472f11ba Mon Sep 17 00:00:00 2001
From: Sergio Correia <scorreia@redhat.com>
Date: Thu, 20 May 2021 10:31:25 -0300
Subject: [PATCH 2/2] Fix possible NULL pointer dereference in find_by_thp()
jwk_thumbprint() might return NULL, so let's make sure we handle that
case.
Issue pointed out by gcc static analyzer.
---
src/keys.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/keys.c b/src/keys.c
index 5a8c1ac..55d0cff 100644
--- a/src/keys.c
+++ b/src/keys.c
@@ -263,7 +263,7 @@ find_by_thp(struct tang_keys_info* tki, const char* target)
json_array_foreach(keys, idx, jwk) {
for (int i = 0; hashes[i]; i++) {
__attribute__ ((__cleanup__(cleanup_str))) char* thumbprint = jwk_thumbprint(jwk, hashes[i]);
- if (strcmp(thumbprint, target) != 0) {
+ if (!thumbprint || strcmp(thumbprint, target) != 0) {
continue;
}
--
2.31.1

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@ -1,12 +1,15 @@
Name: tang
Version: 10
Release: 1%{?dist}
Release: 2%{?dist}
Summary: Network Presence Binding Daemon
License: GPLv3+
URL: https://github.com/latchset/%{name}
Source0: https://github.com/latchset/%{name}/releases/download/v%{version}/%{name}-%{version}.tar.xz
Patch0001: 0001-Fix-issues-reported-by-shellcheck.patch
Patch0002: 0002-Fix-possible-NULL-pointer-dereference-in-find_by_thp.patch
BuildRequires: gcc
BuildRequires: meson
BuildRequires: git-core
@ -83,6 +86,10 @@ exit 0
%{_mandir}/man1/tang-show-keys.1*
%changelog
* Thu May 20 2021 Sergio Correia <scorreia@redhat.com> - 10-2
- Fix issues reported by shellcheck and a possible NULL pointer
dereference reported by gcc static analyzer (3d770c6, 262d98f)
* Wed May 05 2021 Sergio Correia <scorreia@redhat.com> - 10-1
- New upstream release - v10.