New upstream release - v11

This commit is contained in:
Sergio Correia 2021-12-14 08:31:45 -03:00
parent b44ee07e42
commit e659b083bf
7 changed files with 9 additions and 546 deletions

1
.gitignore vendored
View File

@ -1,3 +1,4 @@
/tang-7.tar.bz2
/tang-8.tar.xz
/tang-10.tar.xz
/tang-11.tar.xz

View File

@ -1,155 +0,0 @@
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

View File

@ -1,29 +0,0 @@
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

View File

@ -1,207 +0,0 @@
From b3d12b6a8f0ad7d56a584c1962e92f69b289a2a2 Mon Sep 17 00:00:00 2001
From: Sergio Correia <scorreia@redhat.com>
Date: Mon, 27 Sep 2021 15:19:42 -0300
Subject: [PATCH 3/3] keys: make sure keys are created with 0440 mode
There is no need for them to be readable by other than the owner/group.
Helpers (tangd-keygen and tangd-rotate-keys) also updated.
---
src/keys.c | 7 ++++++
src/tangd-keygen | 3 +++
src/tangd-rotate-keys | 1 +
tests/adv | 11 +++++++++
tests/helpers | 5 ++++
tests/rec | 3 +++
tests/test-keys.c.in | 54 +++++++++++++++++++++++++++++++++++++++++++
7 files changed, 84 insertions(+)
diff --git a/src/keys.c b/src/keys.c
index 55d0cff..a433f9c 100644
--- a/src/keys.c
+++ b/src/keys.c
@@ -17,6 +17,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include <dirent.h>
@@ -337,6 +338,12 @@ create_new_keys(const char* jwkdir)
fprintf(stderr, "Error saving JWK to file (%s)\n", path);
return 0;
}
+
+ /* Set 0440 permission for the new key. */
+ if (chmod(path, S_IRUSR | S_IRGRP) == -1) {
+ fprintf(stderr, "Unable to set permissions for JWK file (%s)\n", path);
+ return 0;
+ }
}
return 1;
}
diff --git a/src/tangd-keygen b/src/tangd-keygen
index f37121f..ed51124 100755
--- a/src/tangd-keygen
+++ b/src/tangd-keygen
@@ -34,7 +34,10 @@ THP_DEFAULT_HASH=S256 # SHA-256.
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"
+chmod 0440 "$1/$sig.jwk"
+
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"
+chmod 0440 "$1/$exc.jwk"
diff --git a/src/tangd-rotate-keys b/src/tangd-rotate-keys
index a095a91..8649652 100755
--- a/src/tangd-rotate-keys
+++ b/src/tangd-rotate-keys
@@ -78,6 +78,7 @@ cd "${JWKDIR}" || error "Unable to change to keys directory '${JWKDIR}'"
thp="$(printf '%s' "${jwe}" | jose jwk thp --input=- \
-a "${DEFAULT_THP_HASH}")"
echo "${jwe}" > "${thp}.jwk"
+ chmod 0440 "${thp}.jwk"
log "Created new key ${thp}.jwk" "${VERBOSE}"
done
cd - >/dev/null
diff --git a/tests/adv b/tests/adv
index 4c8bc97..1fde37e 100755
--- a/tests/adv
+++ b/tests/adv
@@ -27,6 +27,10 @@ export TMP=`mktemp -d`
mkdir -p $TMP/db
tangd-keygen $TMP/db sig exc
+# Make sure keys generated by tangd-keygen have proper permissions.
+valid_key_perm "${TMP}/db/sig.jwk"
+valid_key_perm "${TMP}/db/exc.jwk"
+
jose jwk gen -i '{"alg": "ES512"}' -o $TMP/db/.sig.jwk
jose jwk gen -i '{"alg": "ES512"}' -o $TMP/db/.oth.jwk
@@ -96,6 +100,10 @@ for i in 1 2 3 4 5 6 7 8 9; do
# Make sure the requested keys exist and are valid.
validate_sig "${TMP}/db/other-sig-${i}.jwk"
validate_exc "${TMP}/db/other-exc-${i}.jwk"
+
+ # Make sure keys generated by tangd-keygen have proper permissions.
+ valid_key_perm "${TMP}/db/other-sig-${i}.jwk"
+ valid_key_perm "${TMP}/db/other-exc-${i}.jwk"
done
# Verify the advertisement is correct.
@@ -121,6 +129,9 @@ thp=
for jwk in "${TMP}"/db/*.jwk; do
validate_sig "${jwk}" && thp="$(jose jwk thp -a "${THP_DEFAULT_HASH}" \
-i "${jwk}")"
+
+ # Make sure keys generated by tangd-rotate-keys have proper permissions.
+ valid_key_perm "${jwk}"
done
[ -z "${thp}" ] && die "There should be valid keys after rotation"
test "$(tang-show-keys $PORT)" = "${thp}"
diff --git a/tests/helpers b/tests/helpers
index 7ce54d7..8b789fb 100755
--- a/tests/helpers
+++ b/tests/helpers
@@ -75,3 +75,8 @@ die() {
echo "${1}" >&2
exit 1
}
+
+valid_key_perm() {
+ _perm="$(stat -c %a "${1}")"
+ [ "${_perm}" = "440" ]
+}
diff --git a/tests/rec b/tests/rec
index af0d075..7fba6a9 100755
--- a/tests/rec
+++ b/tests/rec
@@ -28,6 +28,9 @@ mkdir -p $TMP/db
# Generate the server keys
tangd-keygen $TMP/db sig exc
+# Make sure keys generated by tangd-keygen have proper permissions.
+valid_key_perm "${TMP}/db/sig.jwk"
+valid_key_perm "${TMP}/db/exc.jwk"
# Generate the client keys
exc_kid=`jose jwk thp -i $TMP/db/exc.jwk`
diff --git a/tests/test-keys.c.in b/tests/test-keys.c.in
index 1f811f3..fca26c4 100644
--- a/tests/test-keys.c.in
+++ b/tests/test-keys.c.in
@@ -32,6 +32,56 @@ struct test_result_int {
int expected;
};
+static void
+verify_keys_permissions(const char* targetdir)
+{
+ struct stat st;
+ struct dirent* d;
+ DIR* dir = opendir(targetdir);
+ ASSERT(dir);
+ char filepath[PATH_MAX];
+ const char* pattern = ".jwk";
+ while ((d = readdir(dir)) != NULL) {
+ if (strcmp(d->d_name, ".") == 0 || strcmp(d->d_name, "..") == 0) {
+ continue;
+ }
+
+ char* dot = strrchr(d->d_name, '.');
+ if (!dot) {
+ continue;
+ }
+
+ if (strcmp(dot, pattern) == 0) {
+ /* Found a file with .jwk extension. */
+ if (snprintf(filepath, PATH_MAX, "%s/%s", targetdir, d->d_name) < 0) {
+ fprintf(stderr, "Unable to prepare variable with file full path (%s); skipping\n", d->d_name);
+ continue;
+ }
+ filepath[sizeof(filepath) - 1] = '\0';
+ ASSERT(stat(filepath, &st) == 0);
+
+ ASSERT_WITH_MSG(st.st_mode & (S_IRUSR | S_IRGRP), "key = %s, missing perm (0%o)", filepath, (S_IRUSR | S_IRGRP));
+ int unexpected_perms[] = {
+ S_ISUID, /* 04000 set-user-ID */
+ S_ISGID, /* 02000 set-group-ID */
+ S_IWUSR, /* 00200 write by owner */
+ S_IXUSR, /* 00100 execute/search by owner */
+ S_IWGRP, /* 00020 write by group */
+ S_IXGRP, /* 00010 execute/search by group */
+ S_IROTH, /* 00004 read by others */
+ S_IWOTH, /* 00002 write by others */
+ S_IXOTH, /* 00001 execute/search by others */
+ 0
+ };
+ for (int i = 0; unexpected_perms[i] != 0; i++) {
+ ASSERT_WITH_MSG((st.st_mode & unexpected_perms[i]) == 0, "key = %s, i = %d, unexpected perm (0%o)", filepath, i, unexpected_perms[i]);
+ }
+
+ }
+ }
+ closedir(dir);
+}
+
static void
test_create_new_keys(void)
{
@@ -40,6 +90,10 @@ test_create_new_keys(void)
__attribute__((cleanup(cleanup_tang_keys_info))) struct tang_keys_info* tki = read_keys(newdir);
ASSERT(tki);
ASSERT(tki->m_keys_count == 2);
+
+ /* Make sure keys have proper permissions. */
+ verify_keys_permissions(newdir);
+
remove_tempdir(newdir);
}
--
2.31.1

View File

@ -1,147 +0,0 @@
From ab3b913cc74666dffe56d1f87f6f90653d8f4e70 Mon Sep 17 00:00:00 2001
From: Sergio Correia <scorreia@redhat.com>
Date: Sat, 2 Oct 2021 09:14:21 -0300
Subject: [PATCH 4/4] Specify user and group for tang
So that we can run tang itself with a different user.
Systemd unit and helpers for rotating keys updated to use the
new user and group.
---
meson.build | 2 ++
meson_options.txt | 2 ++
src/meson.build | 18 ++++++++++++++++--
src/{tangd-keygen => tangd-keygen.in} | 11 +++++++++--
...{tangd-rotate-keys => tangd-rotate-keys.in} | 9 ++++++++-
units/tangd@.service.in | 1 +
6 files changed, 38 insertions(+), 5 deletions(-)
create mode 100644 meson_options.txt
rename src/{tangd-keygen => tangd-keygen.in} (85%)
rename src/{tangd-rotate-keys => tangd-rotate-keys.in} (92%)
diff --git a/meson.build b/meson.build
index 1733d47..7664e05 100644
--- a/meson.build
+++ b/meson.build
@@ -26,6 +26,8 @@ data.set('libexecdir', libexecdir)
data.set('sysconfdir', sysconfdir)
data.set('systemunitdir', systemunitdir)
data.set('jwkdir', jwkdir)
+data.set('user', get_option('user'))
+data.set('group', get_option('group'))
add_project_arguments(
'-D_POSIX_C_SOURCE=200809L',
diff --git a/meson_options.txt b/meson_options.txt
new file mode 100644
index 0000000..9b1f7c6
--- /dev/null
+++ b/meson_options.txt
@@ -0,0 +1,2 @@
+option('user', type: 'string', value: 'tang', description: 'Unprivileged user for tang operations')
+option('group', type: 'string', value: 'tang', description: 'Unprivileged group for tang operations')
diff --git a/src/meson.build b/src/meson.build
index e7dc60c..f022775 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -7,8 +7,22 @@ tangd = executable('tangd',
install_dir: libexecdir
)
+tangd_keygen = configure_file(
+ input: 'tangd-keygen.in',
+ output: 'tangd-keygen',
+ configuration: data,
+ install: true,
+ install_dir: libexecdir
+)
+
+tangd_rotate_keys = configure_file(
+ input: 'tangd-rotate-keys.in',
+ output: 'tangd-rotate-keys',
+ configuration: data,
+ install: true,
+ install_dir: libexecdir
+)
+
bins += join_paths(meson.current_source_dir(), 'tang-show-keys')
-libexecbins += join_paths(meson.current_source_dir(), 'tangd-keygen')
-libexecbins += join_paths(meson.current_source_dir(), 'tangd-rotate-keys')
# vim:set ts=2 sw=2 et:
diff --git a/src/tangd-keygen b/src/tangd-keygen.in
similarity index 85%
rename from src/tangd-keygen
rename to src/tangd-keygen.in
index ed51124..f74b86f 100755
--- a/src/tangd-keygen
+++ b/src/tangd-keygen.in
@@ -25,6 +25,13 @@ usage() {
exit 1
}
+set_perms() {
+ chmod 0440 -- "${1}"
+ if ! chown @user@:@group@ -- "${1}" 2>/dev/null; then
+ echo "Unable to change owner/group for ${1} to @user@:@group@" >&2
+ fi
+}
+
[ $# -ne 1 ] && [ $# -ne 3 ] && usage
[ -d "$1" ] || usage
@@ -34,10 +41,10 @@ THP_DEFAULT_HASH=S256 # SHA-256.
jwe=$(jose jwk gen -i '{"alg":"ES512"}')
[ -z "$sig" ] && sig=$(echo "$jwe" | jose jwk thp -i- -a "${THP_DEFAULT_HASH}")
echo "$jwe" > "$1/$sig.jwk"
-chmod 0440 "$1/$sig.jwk"
+set_perms "$1/$sig.jwk"
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"
-chmod 0440 "$1/$exc.jwk"
+set_perms "$1/$exc.jwk"
diff --git a/src/tangd-rotate-keys b/src/tangd-rotate-keys.in
similarity index 92%
rename from src/tangd-rotate-keys
rename to src/tangd-rotate-keys.in
index 8649652..56b94ad 100755
--- a/src/tangd-rotate-keys
+++ b/src/tangd-rotate-keys.in
@@ -48,6 +48,13 @@ error() {
usage 1
}
+set_perms() {
+ chmod 0440 -- "${1}"
+ if ! chown @user@:@group@ -- "${1}" 2>/dev/null; then
+ echo "Unable to change owner/group for ${1} to @user@:@group@" >&2
+ fi
+}
+
JWKDIR=
VERBOSE=
while getopts "hvd:" o; do
@@ -78,7 +85,7 @@ cd "${JWKDIR}" || error "Unable to change to keys directory '${JWKDIR}'"
thp="$(printf '%s' "${jwe}" | jose jwk thp --input=- \
-a "${DEFAULT_THP_HASH}")"
echo "${jwe}" > "${thp}.jwk"
- chmod 0440 "${thp}.jwk"
+ set_perms "${thp}.jwk"
log "Created new key ${thp}.jwk" "${VERBOSE}"
done
cd - >/dev/null
diff --git a/units/tangd@.service.in b/units/tangd@.service.in
index f1db261..aeb2dc1 100644
--- a/units/tangd@.service.in
+++ b/units/tangd@.service.in
@@ -6,3 +6,4 @@ StandardInput=socket
StandardOutput=socket
StandardError=journal
ExecStart=@libexecdir@/tangd @jwkdir@
+User=@user@
--
2.31.1

View File

@ -1 +1 @@
SHA512 (tang-10.tar.xz) = 9bd438edb77e4f14372a19313abde342d1b111e99e6b2b3aa46714dc0807fc33c62f4c778f83b7c30d00e2c7e0c65724a3b2d3116478ff4e67a408e3faac09ce
SHA512 (tang-11.tar.xz) = 332ff8bca33afef17cb86a77780f34499659ee0576b36b111a0a57996836b6770d89c5f5fa5da9c6095f17c731db6ad1e261bf6d97b6daa109565e8e294e3b87

View File

@ -1,17 +1,12 @@
Name: tang
Version: 10
Release: 5%{?dist}
Version: 11
Release: 1%{?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
Patch0003: 0003-keys-make-sure-keys-are-created-with-0440-mode.patch
Patch0004: 0004-Specify-user-and-group-for-tang.patch
BuildRequires: gcc
BuildRequires: meson
BuildRequires: git-core
@ -99,8 +94,13 @@ fi
%{_mandir}/man8/tang.8*
%{_bindir}/%{name}-show-keys
%{_mandir}/man1/tang-show-keys.1*
%{_mandir}/man1/tangd-rotate-keys.1.*
%changelog
* Tue Dec 14 2021 Sergio Correia <scorreia@redhat.com> - 11-1
- New upstream release - v11.
Resolves: CVE-2021-4076
* Mon Oct 04 2021 Sergio Arroutbi <sarroutb@redhat.com> - 10-5
- Fix scriptlet from previous commit