From patchwork Mon Apr 27 09:20:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Chikunov X-Patchwork-Id: 11511705 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0D9A71392 for ; Mon, 27 Apr 2020 09:20:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E0756206E9 for ; Mon, 27 Apr 2020 09:20:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726604AbgD0JUy (ORCPT ); Mon, 27 Apr 2020 05:20:54 -0400 Received: from vmicros1.altlinux.org ([194.107.17.57]:34900 "EHLO vmicros1.altlinux.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726507AbgD0JUy (ORCPT ); Mon, 27 Apr 2020 05:20:54 -0400 Received: from imap.altlinux.org (imap.altlinux.org [194.107.17.38]) by vmicros1.altlinux.org (Postfix) with ESMTP id 0800472CCDC; Mon, 27 Apr 2020 12:20:51 +0300 (MSK) Received: from beacon.altlinux.org (unknown [83.220.44.62]) by imap.altlinux.org (Postfix) with ESMTPSA id DFE5E4A4AEE; Mon, 27 Apr 2020 12:20:50 +0300 (MSK) From: Vitaly Chikunov To: Mimi Zohar , Dmitry Kasatkin , linux-integrity@vger.kernel.org Subject: [PATCH v10 1/2] ima-evm-utils: Add some tests for evmctl Date: Mon, 27 Apr 2020 12:20:26 +0300 Message-Id: <20200427092027.8639-2-vt@altlinux.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20200427092027.8639-1-vt@altlinux.org> References: <20200427092027.8639-1-vt@altlinux.org> MIME-Version: 1.0 Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org Run `make check' to execute the tests. This commit only adds ima_hash test. Signed-off-by: Vitaly Chikunov --- .gitignore | 2 +- Makefile.am | 2 +- configure.ac | 1 + tests/.gitignore | 16 +++ tests/Makefile.am | 7 ++ tests/functions.sh | 274 ++++++++++++++++++++++++++++++++++++++++++++++++++++ tests/ima_hash.test | 80 +++++++++++++++ 7 files changed, 380 insertions(+), 2 deletions(-) create mode 100644 tests/.gitignore create mode 100644 tests/Makefile.am create mode 100755 tests/functions.sh create mode 100755 tests/ima_hash.test diff --git a/.gitignore b/.gitignore index cb82166..c579199 100644 --- a/.gitignore +++ b/.gitignore @@ -21,7 +21,7 @@ missing compile libtool ltmain.sh - +test-driver # Compiled executables *.o diff --git a/Makefile.am b/Makefile.am index dba408d..45c6f82 100644 --- a/Makefile.am +++ b/Makefile.am @@ -1,4 +1,4 @@ -SUBDIRS = src +SUBDIRS = src tests dist_man_MANS = evmctl.1 doc_DATA = examples/ima-genkey-self.sh examples/ima-genkey.sh examples/ima-gen-local-ca.sh diff --git a/configure.ac b/configure.ac index 099c3b1..f246182 100644 --- a/configure.ac +++ b/configure.ac @@ -72,6 +72,7 @@ EVMCTL_MANPAGE_DOCBOOK_XSL AC_CONFIG_FILES([Makefile src/Makefile + tests/Makefile packaging/ima-evm-utils.spec ]) AC_OUTPUT diff --git a/tests/.gitignore b/tests/.gitignore new file mode 100644 index 0000000..9ecc984 --- /dev/null +++ b/tests/.gitignore @@ -0,0 +1,16 @@ +# Generated by test driver +*.log +*.trs + +# Generated by tests +*.txt +*.out +*.sig +*.sig2 + +# Generated certs and keys (by gen-keys.sh) +*.cer +*.pub +*.key +*.conf + diff --git a/tests/Makefile.am b/tests/Makefile.am new file mode 100644 index 0000000..e37b958 --- /dev/null +++ b/tests/Makefile.am @@ -0,0 +1,7 @@ +check_SCRIPTS = +TESTS = $(check_SCRIPTS) + +check_SCRIPTS += ima_hash.test + +clean-local: + -rm -f *.txt *.out *.sig *.sig2 diff --git a/tests/functions.sh b/tests/functions.sh new file mode 100755 index 0000000..91cd5d9 --- /dev/null +++ b/tests/functions.sh @@ -0,0 +1,274 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# ima-evm-utils tests bash functions +# +# Copyright (C) 2020 Vitaly Chikunov +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2, or (at your option) +# any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# Tests accounting +declare -i testspass=0 testsfail=0 testsskip=0 + +# Exit codes (compatible with automake) +declare -r OK=0 +declare -r FAIL=1 +declare -r HARDFAIL=99 # hard failure no matter testing mode +declare -r SKIP=77 + +# You can set env VERBOSE=1 to see more output from evmctl +VERBOSE=${VERBOSE:-0} +V=vvvv +V=${V:0:$VERBOSE} +V=${V:+-$V} + +# Exit if env FAILEARLY is defined. +# Used in expect_{pass,fail}. +exit_early() { + if [ "$FAILEARLY" ]; then + exit "$1" + fi +} + +# Require particular executables to be present +_require() { + ret= + for i; do + if ! type $i; then + echo "$i is required for test" + ret=1 + fi + done + [ $ret ] && exit "$HARDFAIL" +} + +# Non-TTY output is never colored +if [ -t 1 ]; then + RED=$'\e[1;31m' + GREEN=$'\e[1;32m' + YELLOW=$'\e[1;33m' + BLUE=$'\e[1;34m' + CYAN=$'\e[1;36m' + NORM=$'\e[m' + export RED GREEN YELLOW BLUE CYAN NORM +fi + +# Test mode determined by TFAIL variable: +# undefined: to success testing +# defined: failure testing +TFAIL= +TMODE=+ # mode character to prepend running command in log +declare -i TNESTED=0 # just for sanity checking + +# Run positive test (one that should pass) and account its result +expect_pass() { + local -i ret + + if [ $TNESTED -gt 0 ]; then + echo $RED"expect_pass should not be run nested"$NORM + testsfail+=1 + exit "$HARDFAIL" + fi + TFAIL= + TMODE=+ + TNESTED+=1 + [ "$VERBOSE" -gt 1 ] && echo "____ START positive test: $*" + "$@" + ret=$? + [ "$VERBOSE" -gt 1 ] && echo "^^^^ STOP ($ret) positive test: $*" + TNESTED+=-1 + case $ret in + 0) testspass+=1 ;; + 77) testsskip+=1 ;; + 99) testsfail+=1; exit_early 1 ;; + *) testsfail+=1; exit_early 2 ;; + esac + return $ret +} + +# Eval negative test (one that should fail) and account its result +expect_fail() { + local ret + + if [ $TNESTED -gt 0 ]; then + echo $RED"expect_fail should not be run nested"$NORM + testsfail+=1 + exit "$HARDFAIL" + fi + + TFAIL=yes + TMODE=- + TNESTED+=1 + [ "$VERBOSE" -gt 1 ] && echo "____ START negative test: $*" + "$@" + ret=$? + [ "$VERBOSE" -gt 1 ] && echo "^^^^ STOP ($ret) negative test: $*" + TNESTED+=-1 + case $ret in + 0) testsfail+=1; exit_early 3 ;; + 77) testsskip+=1 ;; + 99) testsfail+=1; exit_early 4 ;; + *) testspass+=1 ;; + esac + # Restore defaults (as in positive tests) + # for tests to run without wrappers + TFAIL= + TMODE=+ + return $ret +} + +# return true if current test is positive +_test_expected_to_pass() { + [ ! $TFAIL ] +} + +# return true if current test is negative +_test_expected_to_fail() { + [ $TFAIL ] +} + +# Show blank line and color following text to red +# if it's real error (ie we are in expect_pass mode). +color_red_on_failure() { + if _test_expected_to_pass; then + echo "$RED" + COLOR_RESTORE=true + fi +} + +# For hard errors +color_red() { + echo "$RED" + COLOR_RESTORE=true +} + +color_restore() { + [ $COLOR_RESTORE ] && echo "$NORM" + COLOR_RESTORE= +} + +ADD_DEL= +ADD_TEXT_FOR= +# _evmctl_run should be run as `_evmctl_run ... || return' +_evmctl_run() { + local op=$1 out=$1-$$.out + local text_for=${FOR:+for $ADD_TEXT_FOR} + # Additional parameters: + # ADD_DEL: additional files to rm on failure + # ADD_TEXT_FOR: append to text as 'for $ADD_TEXT_FOR' + + cmd="evmctl $V $EVMCTL_ENGINE $*" + echo $YELLOW$TMODE "$cmd"$NORM + $cmd >"$out" 2>&1 + ret=$? + + # Shell special and signal exit codes (except 255) + if [ $ret -ge 126 ] && [ $ret -lt 255 ]; then + color_red + echo "evmctl $op failed hard with ($ret) $text_for" + sed 's/^/ /' "$out" + color_restore + rm "$out" $ADD_DEL + ADD_DEL= + ADD_TEXT_FOR= + return "$HARDFAIL" + elif [ $ret -gt 0 ]; then + color_red_on_failure + echo "evmctl $op failed" ${TFAIL:+properly} "with ($ret) $text_for" + # Show evmctl output only in verbose mode or if real failure. + if _test_expected_to_pass || [ "$VERBOSE" ]; then + sed 's/^/ /' "$out" + fi + color_restore + rm "$out" $ADD_DEL + ADD_DEL= + ADD_TEXT_FOR= + return "$FAIL" + elif _test_expected_to_fail; then + color_red + echo "evmctl $op wrongly succeeded $text_for" + sed 's/^/ /' "$out" + color_restore + else + [ "$VERBOSE" ] && sed 's/^/ /' "$out" + fi + rm "$out" + ADD_DEL= + ADD_TEXT_FOR= + return "$OK" +} + +# Extract xattr $attr from $file into $out file skipping $pref'ix +_extract_xattr() { + local file=$1 attr=$2 out=$3 pref=$4 + + getfattr -n "$attr" -e hex "$file" \ + | grep "^$attr=" \ + | sed "s/^$attr=$pref//" \ + | xxd -r -p > "$out" +} + +# Test if xattr $attr in $file matches $prefix +# Show error and fail otherwise. +_test_xattr() { + local file=$1 attr=$2 prefix=$3 + local text_for=${ADD_TEXT_FOR:+ for $ADD_TEXT_FOR} + + if ! getfattr -n "$attr" -e hex "$file" | egrep -qx "$attr=$prefix"; then + color_red_on_failure + echo "Did not find expected hash$text_for:" + echo " $attr=$prefix" + echo "" + echo "Actual output below:" + getfattr -n "$attr" -e hex "$file" | sed 's/^/ /' + color_restore + rm "$file" + ADD_TEXT_FOR= + return "$FAIL" + fi + ADD_TEXT_FOR= +} + +# Try to enable gost-engine if needed. +_enable_gost_engine() { + # Do not enable if it's already working (enabled by user) + if ! openssl md_gost12_256 /dev/null >/dev/null 2>&1 \ + && openssl engine gost >/dev/null 2>&1; then + export EVMCTL_ENGINE="--engine gost" + export OPENSSL_ENGINE="-engine gost" + fi +} + +# Show test stats and exit into automake test system +# with proper exit code (same as ours). +_report_exit() { + if [ $testsfail -gt 0 ]; then + echo "=================================" + echo " Run with FAILEARLY=1 $0 $*" + echo " To stop after first failure" + echo "=================================" + fi + [ $testspass -gt 0 ] && echo -n "$GREEN" || echo -n "$NORM" + echo -n "PASS: $testspass" + [ $testsskip -gt 0 ] && echo -n "$YELLOW" || echo -n "$NORM" + echo -n " SKIP: $testsskip" + [ $testsfail -gt 0 ] && echo -n "$RED" || echo -n "$NORM" + echo " FAIL: $testsfail" + echo "$NORM" + if [ $testsfail -gt 0 ]; then + exit "$FAIL" + elif [ $testspass -gt 0 ]; then + exit "$OK" + else + exit "$SKIP" + fi +} + diff --git a/tests/ima_hash.test b/tests/ima_hash.test new file mode 100755 index 0000000..8d66e59 --- /dev/null +++ b/tests/ima_hash.test @@ -0,0 +1,80 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# evmctl ima_hash tests +# +# Copyright (C) 2020 Vitaly Chikunov +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2, or (at your option) +# any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +cd "$(dirname "$0")" || exit 1 +PATH=../src:$PATH +source ./functions.sh +_require evmctl openssl getfattr + +trap _report_exit EXIT +set -f # disable globbing + +check() { + local alg=$1 prefix=$2 chash=$3 hash + local file=$alg-hash.txt + + rm -f "$file" + touch "$file" + # Generate hash with openssl, if it failed skip test, + # unless it's negative test, then pass to evmctl + cmd="openssl dgst $OPENSSL_ENGINE -$alg $file" + echo - "$cmd" + hash=$(set -o pipefail; $cmd 2>/dev/null | cut -d' ' -f2) + if [ $? -ne 0 ] && _test_expected_to_pass; then + echo "${CYAN}$alg test is skipped$NORM" + rm "$file" + return "$SKIP" + fi + if [ "$chash" ] && [ "$chash" != "$hash" ]; then + color_red + echo "Invalid hash for $alg from openssl" + echo "Expected: $chash" + echo "Returned: $hash" + color_restore + rm "$file" + return "$HARDFAIL" + fi + + ADD_TEXT_FOR=$alg ADD_DEL=$file \ + _evmctl_run ima_hash --hashalgo "$alg" --xattr-user "$file" || return + ADD_TEXT_FOR=$alg \ + _test_xattr "$file" user.ima "$prefix$hash" || return + rm "$file" + return "$OK" +} + +# check args: algo hdr-prefix canonic-hash +expect_pass check md4 0x01 31d6cfe0d16ae931b73c59d7e0c089c0 +expect_pass check md5 0x01 d41d8cd98f00b204e9800998ecf8427e +expect_pass check sha1 0x01 da39a3ee5e6b4b0d3255bfef95601890afd80709 +expect_fail check SHA1 0x01 # uppercase +expect_fail check sha512-224 0x01 # valid for pkcs1 +expect_fail check sha512-256 0x01 # valid for pkcs1 +expect_fail check unknown 0x01 # nonexistent +expect_pass check sha224 0x0407 d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f +expect_pass check sha256 0x0404 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 +expect_pass check sha384 0x0405 38b060a751ac96384cd9327eb1b1e36a21fdb71114be07434c0cc7bf63f6e1da274edebfe76f65fbd51ad2f14898b95b +expect_pass check sha512 0x0406 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e +expect_pass check rmd160 0x0403 9c1185a5c5e9fc54612808977ee8f548b2258d31 +expect_fail check sm3 0x01 +expect_fail check sm3-256 0x01 +_enable_gost_engine +expect_pass check md_gost12_256 0x0412 3f539a213e97c802cc229d474c6aa32a825a360b2a933a949fd925208d9ce1bb +expect_pass check streebog256 0x0412 3f539a213e97c802cc229d474c6aa32a825a360b2a933a949fd925208d9ce1bb +expect_pass check md_gost12_512 0x0413 8e945da209aa869f0455928529bcae4679e9873ab707b55315f56ceb98bef0a7362f715528356ee83cda5f2aac4c6ad2ba3a715c1bcd81cb8e9f90bf4c1c1a8a +expect_pass check streebog512 0x0413 8e945da209aa869f0455928529bcae4679e9873ab707b55315f56ceb98bef0a7362f715528356ee83cda5f2aac4c6ad2ba3a715c1bcd81cb8e9f90bf4c1c1a8a + From patchwork Mon Apr 27 09:20:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Chikunov X-Patchwork-Id: 11511707 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1D078912 for ; Mon, 27 Apr 2020 09:21:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0A4FE206D6 for ; Mon, 27 Apr 2020 09:21:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726504AbgD0JVJ (ORCPT ); Mon, 27 Apr 2020 05:21:09 -0400 Received: from vmicros1.altlinux.org ([194.107.17.57]:34966 "EHLO vmicros1.altlinux.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726507AbgD0JVJ (ORCPT ); Mon, 27 Apr 2020 05:21:09 -0400 Received: from imap.altlinux.org (imap.altlinux.org [194.107.17.38]) by vmicros1.altlinux.org (Postfix) with ESMTP id A214072CCDC; Mon, 27 Apr 2020 12:20:59 +0300 (MSK) Received: from beacon.altlinux.org (unknown [83.220.44.62]) by imap.altlinux.org (Postfix) with ESMTPSA id 5D3284A4AEE; Mon, 27 Apr 2020 12:20:59 +0300 (MSK) From: Vitaly Chikunov To: Mimi Zohar , Dmitry Kasatkin , linux-integrity@vger.kernel.org Subject: [PATCH v10 2/2] ima-evm-utils: Add sign/verify tests for evmctl Date: Mon, 27 Apr 2020 12:20:27 +0300 Message-Id: <20200427092027.8639-3-vt@altlinux.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20200427092027.8639-1-vt@altlinux.org> References: <20200427092027.8639-1-vt@altlinux.org> MIME-Version: 1.0 Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org This commit adds (evm) sign, (evm) verify, ima_sign, and ima_verify tests for different algos. Signed-off-by: Vitaly Chikunov --- tests/Makefile.am | 7 +- tests/gen-keys.sh | 97 +++++++++++++ tests/sign_verify.test | 370 +++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 473 insertions(+), 1 deletion(-) create mode 100755 tests/gen-keys.sh create mode 100755 tests/sign_verify.test diff --git a/tests/Makefile.am b/tests/Makefile.am index e37b958..029f2ff 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -1,7 +1,12 @@ check_SCRIPTS = TESTS = $(check_SCRIPTS) -check_SCRIPTS += ima_hash.test +check_SCRIPTS += ima_hash.test sign_verify.test clean-local: -rm -f *.txt *.out *.sig *.sig2 + +distclean: distclean-keys +.PHONY: distclean-keys +distclean-keys: + ./gen-keys.sh clean diff --git a/tests/gen-keys.sh b/tests/gen-keys.sh new file mode 100755 index 0000000..407876b --- /dev/null +++ b/tests/gen-keys.sh @@ -0,0 +1,97 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Generate keys for the tests +# +# Copyright (C) 2020 Vitaly Chikunov +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2, or (at your option) +# any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +cd "$(dirname "$0")" || exit 1 +PATH=../src:$PATH +type openssl + +log() { + echo - "$*" + eval "$@" +} + +if [ "$1" = clean ]; then + rm -f test-ca.conf +elif [ "$1" = force ] || [ ! -e test-ca.conf ]; then +cat > test-ca.conf <<- EOF + [ req ] + distinguished_name = req_distinguished_name + prompt = no + string_mask = utf8only + x509_extensions = v3_ca + + [ req_distinguished_name ] + O = IMA-CA + CN = IMA/EVM certificate signing key + emailAddress = ca@ima-ca + + [ v3_ca ] + basicConstraints=CA:TRUE + subjectKeyIdentifier=hash + authorityKeyIdentifier=keyid:always,issuer +EOF +fi + +# RSA +# Second key will be used for wrong key tests. +for m in 1024 2048; do + if [ "$1" = clean ] || [ "$1" = force ]; then + rm -f test-rsa$m.cer test-rsa$m.key test-rsa$m.pub + fi + if [ "$1" = clean ]; then + continue + fi + if [ ! -e test-rsa$m.key ]; then + log openssl req -verbose -new -nodes -utf8 -sha1 -days 10000 -batch -x509 \ + -config test-ca.conf \ + -newkey rsa:$m \ + -out test-rsa$m.cer -outform DER \ + -keyout test-rsa$m.key + # for v1 signatures + log openssl pkey -in test-rsa$m.key -out test-rsa$m.pub -pubout + fi +done + +# EC-RDSA +for m in \ + gost2012_256:A \ + gost2012_256:B \ + gost2012_256:C \ + gost2012_512:A \ + gost2012_512:B; do + IFS=':' read -r algo param <<< "$m" + if [ "$1" = clean ] || [ "$1" = force ]; then + rm -f "test-$algo-$param.key" "test-$algo-$param.cer" "test-$algo-$param.pub" + fi + if [ "$1" = clean ]; then + continue + fi + [ -e "test-$algo-$param.key" ] && continue + log openssl req -nodes -x509 -utf8 -days 10000 -batch \ + -config test-ca.conf \ + -newkey "$algo" \ + -pkeyopt "paramset:$param" \ + -out "test-$algo-$param.cer" -outform DER \ + -keyout "test-$algo-$param.key" + if [ -s "test-$algo-$param.key" ]; then + log openssl pkey -in "test-$algo-$param.key" -out "test-$algo-$param.pub" -pubout + fi +done + +# This script leaves test-ca.conf, *.cer, *.pub, *.key files for sing/verify tests. +# They are never deleted except by `make distclean'. + diff --git a/tests/sign_verify.test b/tests/sign_verify.test new file mode 100755 index 0000000..118c3f6 --- /dev/null +++ b/tests/sign_verify.test @@ -0,0 +1,370 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# evmctl {,ima_}{sign,verify} tests +# +# Copyright (C) 2020 Vitaly Chikunov +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2, or (at your option) +# any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +cd "$(dirname "$0")" || exit 1 +PATH=../src:$PATH +source ./functions.sh +_require evmctl openssl xxd getfattr +./gen-keys.sh >/dev/null 2>&1 + +trap _report_exit EXIT +set -f # disable globbing + +# Determine keyid from a cert +_keyid_from_cert() { + local cer=${1%.*}.cer cmd + local tmp + + cer=test-${cer#test-} + # shellcheck disable=SC2086 + cmd="openssl x509 $OPENSSL_ENGINE \ + -in $cer -inform DER -pubkey -noout" + id=$($cmd 2>/dev/null \ + | openssl asn1parse \ + | grep BIT.STRING \ + | cut -d: -f1) + if [ -z "$id" ]; then + echo - "$cmd" >&2 + echo "Cannot asn1parse $cer to determine keyid" >&2 + exit 1 + fi + tmp=$(mktemp) + # shellcheck disable=SC2086 + openssl x509 $OPENSSL_ENGINE \ + -in "$cer" -inform DER -pubkey -noout 2>/dev/null \ + | openssl asn1parse -strparse "$id" -out "$tmp" -noout + # shellcheck disable=SC2002 + cat "$tmp" \ + | openssl dgst -c -sha1 \ + | cut -d' ' -f2 \ + | grep -o ":..:..:..:..$" \ + | tr -d : + rm -f "$tmp" +} + +# Convert test $type into evmctl op prefix +_op() { + if [ "$1" = ima ]; then + echo ima_ + fi +} + +# Convert test $type into xattr name +_xattr() { + if [ "$1" = ima ]; then + echo user.ima + else + echo user.evm + fi +} + +# Check that detached signature matches xattr signature +_test_sigfile() { + local file=$1 attr=$2 file_sig=$3 file_sig2=$4 + + if [ ! -e "$file_sig" ]; then + color_red + echo "evmctl ima_sign: no detached signature $file_sig" + color_restore + rm "$file" + return "$FAIL" + fi + + _extract_xattr "$file" "$attr" "$file_sig2" + if ! cmp -bl "$file_sig" "$file_sig2"; then + color_red + echo "evmctl ima_sign: xattr signature on $file differ from detached $file_sig" + color_restore + rm "$file" "$file_sig" "$file_sig2" + return "$FAIL" + fi + + rm "$file_sig" "$file_sig2" +} + +# Run single sign command +_evmctl_sign() { + local type=$1 key=$2 alg=$3 file=$4 opts=$5 + + # Can check --sigfile for ima_sign + [ "$type" = ima ] && opts+=" --sigfile" + + # shellcheck disable=SC2086 + ADD_TEXT_FOR="$alg ($key)" ADD_DEL=$file \ + _evmctl_run "$(_op "$type")sign" $opts \ + --hashalgo "$alg" --key "$key" --xattr-user "$file" || return + + if [ "$type" = ima ]; then + _test_sigfile "$file" "$(_xattr "$type")" "$file.sig" "$file.sig2" + fi +} + +# Run and test {ima_,}sign operation +check_sign() { + # Arguments are passed via global vars: + # TYPE (ima or evm), + # KEY, + # ALG (hash algo), + # PREFIX (signature header prefix in hex), + # OPTS (additional options for evmctl), + # FILE (working file to sign). + local "$@" + local KEY=${KEY%.*}.key + local FILE=${FILE:-$ALG.txt} + + # Normalize key filename + KEY=test-${KEY#test-} + + # Append suffix to files for negative tests, because we may + # leave only good files for verify tests. + _test_expected_to_fail && FILE+='~' + + rm -f $FILE + if ! touch $FILE; then + color_red + echo "Can't create test file: $FILE" + color_restore + return "$HARDFAIL" + fi + + if _test_expected_to_pass; then + # Can openssl work with this digest? + cmd="openssl dgst $OPENSSL_ENGINE -$ALG $FILE" + echo - "$cmd" + if ! $cmd >/dev/null; then + echo "${CYAN}$ALG ($KEY) test is skipped (openssl is unable to digest)$NORM" + return "$SKIP" + fi + + if [ ! -e "$KEY" ]; then + echo "${CYAN}$ALG ($KEY) test is skipped (key file not found)$NORM" + return "$SKIP" + fi + + # Can openssl sign with this digest and key? + cmd="openssl dgst $OPENSSL_ENGINE -$ALG -sign $KEY -hex $FILE" + echo - "$cmd" + if ! $cmd >/dev/null; then + echo "${CYAN}$ALG ($KEY) test is skipped (openssl is unable to sign)$NORM" + return "$SKIP" + fi + fi + + # Insert keyid from cert into PREFIX in-place of marker `:K:' + if [[ $PREFIX =~ :K: ]]; then + keyid=$(_keyid_from_cert "$KEY") + if [ $? -ne 0 ]; then + color_red + echo "Unable to determine keyid for $KEY" + color_restore + return "$HARDFAIL" + fi + [ "$VERBOSE" -gt 2 ] && echo " Expected keyid: $keyid" + PREFIX=${PREFIX/:K:/$keyid} + fi + + # Perform signing by evmctl + _evmctl_sign "$TYPE" "$KEY" "$ALG" "$FILE" "$OPTS" || return + + # First simple pattern match the signature. + ADD_TEXT_FOR=$ALG \ + _test_xattr "$FILE" "$(_xattr "$TYPE")" "$PREFIX.*" || return + + # This is all we can do for v1 signatures. + [[ "$OPTS" =~ --rsa ]] && return "$OK" + + # This is all we can do for evm. + [[ "$TYPE" =~ evm ]] && return "$OK" + + # Extract signature to a file + _extract_xattr "$FILE" "$(_xattr "$TYPE")" "$FILE.sig2" "$PREFIX" + + # Verify extracted signature with openssl + cmd="openssl dgst $OPENSSL_ENGINE -$ALG -verify ${KEY%.*}.pub \ + -signature $FILE.sig2 $FILE" + echo - "$cmd" + if ! $cmd; then + color_red_on_failure + echo "Signature v2 verification with openssl is failed." + color_restore + rm "$FILE.sig2" + return "$FAIL" + fi + + rm "$FILE.sig2" + return "$OK" +} + +# Test verify operation +check_verify() { + # Arguments are passed via global vars: + # TYPE (ima or evm), + # KEY, + # ALG (hash algo), + # OPTS (additional options for evmctl), + # FILE (filename to verify). + local "$@" + + # shellcheck disable=SC2086 + if ! openssl dgst $OPENSSL_ENGINE -"$ALG" /dev/null >/dev/null 2>&1; then + echo $CYAN"$ALG ($KEY) test is skipped (openssl does not support $ALG)"$NORM + return $SKIP + fi + + # shellcheck disable=SC2086 + ADD_TEXT_FOR="$FILE ($KEY)" \ + _evmctl_run "$(_op "$TYPE")verify" --key "$KEY" --xattr-user $OPTS "$FILE" +} + +# Test runners + +# Perform sign and verify ima and evm testing +sign_verify() { + local key=$1 alg=$2 prefix="$3" opts="$4" + local file=$alg.txt + + # Set defaults: + # Public key is different for v1 and v2 (where x509 cert is used). + if [[ $opts =~ --rsa ]]; then + KEY=test-$key.pub + else + KEY=test-$key.cer + fi + ALG=$alg + PREFIX=$prefix + OPTS=$opts + FILE=$file + + TYPE=ima + if expect_pass check_sign; then + + # Normal verify with proper key should pass + expect_pass check_verify + + # Multiple files and some don't verify + expect_fail check_verify FILE="/dev/null $file" + fi + + TYPE=evm + # Avoid running blkid for evm tests which may require root + # No generation on overlayfs: + # ioctl(3, FS_IOC_GETVERSION, 0x7ffd8e0bd628) = -1 ENOTTY (Inappropriate ioctl for device) + OPTS="$opts --uuid --generation 0" + if expect_pass check_sign; then + + # Normal verify with proper key + expect_pass check_verify + + # Verify with wrong key + expect_fail check_verify KEY=rsa2048 + fi + + # Note: Leaving TYPE=evm and file is evm signed +} + +# Test --keys +try_different_keys() { + # This run after sign_verify which leaves + # TYPE=evm and file is evm signed + + # v2 signing can work with multiple keys in --key option + if [[ ! $OPTS =~ --rsa ]]; then + + # Have correct key in the key list + expect_pass check_verify KEY="test-rsa2048.cer,$KEY" + expect_pass check_verify KEY="/dev/null,$KEY," + fi + + # Try key that is not used for signing + expect_fail check_verify KEY=rsa2048 + + # Try completely wrong key files + expect_fail check_verify KEY=/dev/null + expect_fail check_verify KEY=/dev/zero +} + +try_different_sigs() { + # TYPE=evm and file is evm signed + + # Test --imasig + if expect_pass check_sign OPTS="$OPTS --imasig"; then + + # Verify both evm and ima sigs + expect_pass check_verify + expect_pass check_verify TYPE=ima + fi + + # Test --imahash + if expect_pass check_sign OPTS="$OPTS --imahash"; then + + expect_pass check_verify + + # IMA hash is not verifiable by ima_verify + expect_fail check_verify TYPE=ima + fi + + # Test --portable + expect_pass check_sign OPTS="$OPTS --portable" PREFIX=0x05 + # Cannot be verified for now, until that support is added to evmctl + + # Test -i (immutable) + expect_pass check_sign OPTS="$OPTS -i" PREFIX=0x0303 + # Cannot be verified for now +} + +# Single test args: type key hash signature-prefix "evmctl-options" +# sign_verify args: key hash signature-prefix "evmctl-options" +# Only single test can be prefixed with expect_{fail,pass} +# `sign_verify' can not be prefixed with expect_{fail,pass} because +# it runs multiple tests inside. See more tests there. +# signature-prefix can contain `:K:' which will be resolved to keyid (v2 only) + +## Test v1 signatures +# Signature v1 only supports sha1 and sha256 so any other should fail +expect_fail \ + check_sign TYPE=ima KEY=rsa1024 ALG=md5 PREFIX=0x0301 OPTS=--rsa + +sign_verify rsa1024 sha1 0x0301 --rsa +sign_verify rsa1024 sha256 0x0301 --rsa + try_different_keys + try_different_sigs + +## Test v2 signatures with RSA PKCS#1 +# List of allowed hashes much greater but not all are supported. +sign_verify rsa1024 md5 0x030201:K:0080 +sign_verify rsa1024 sha1 0x030202:K:0080 +sign_verify rsa1024 sha224 0x030207:K:0080 +sign_verify rsa1024 sha256 0x030204:K:0080 + try_different_keys + try_different_sigs +sign_verify rsa1024 sha384 0x030205:K:0080 +sign_verify rsa1024 sha512 0x030206:K:0080 +sign_verify rsa1024 rmd160 0x030203:K:0080 + +# Test v2 signatures with EC-RDSA +_enable_gost_engine +sign_verify gost2012_256-A md_gost12_256 0x030212:K:0040 +sign_verify gost2012_256-B md_gost12_256 0x030212:K:0040 +sign_verify gost2012_256-C md_gost12_256 0x030212:K:0040 +sign_verify gost2012_512-A md_gost12_512 0x030213:K:0080 +sign_verify gost2012_512-B md_gost12_512 0x030213:K:0080 +# Test if signing with wrong key length does not work. +expect_fail \ + check_sign TYPE=ima KEY=gost2012_512-B ALG=md_gost12_256 PREFIX=0x0302 OPTS= +expect_fail \ + check_sign TYPE=ima KEY=gost2012_256-B ALG=md_gost12_512 PREFIX=0x0302 OPTS= +