@@ -1,7 +1,12 @@
check_SCRIPTS =
TESTS = $(check_SCRIPTS)
-check_SCRIPTS += ima_hash.test
+check_SCRIPTS += ima_hash.test sign_verify.test
clean-local:
-rm -f *.txt *.out *.sig *.sig2
+
+distclean: distclean-keys
+.PHONY: distclean-keys
+distclean-keys:
+ ./gen-keys.sh clean
new file mode 100755
@@ -0,0 +1,97 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Generate keys for the tests
+#
+# Copyright (C) 2020 Vitaly Chikunov <vt@altlinux.org>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+cd "$(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-$param.pub" -pubout
+ fi
+done
+
+# This script leaves test-ca.conf, *.cer, *.pub, *.key files for sing/verify tests.
+# They are never deleted except by `make distclean'.
+
new file mode 100755
@@ -0,0 +1,364 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# evmctl {,ima_}{sign,verify} tests
+#
+# Copyright (C) 2020 Vitaly Chikunov <vt@altlinux.org>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+cd "$(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() {
+ local cer=${1%.*}.cer cmd
+ local tmp
+
+ cer=test-${cer#test-}
+ 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)
+ openssl x509 $OPENSSL_ENGINE \
+ -in "$cer" -inform DER -pubkey -noout 2>/dev/null \
+ | openssl asn1parse -strparse "$id" -out "$tmp" -noout
+ 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"
+
+ 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),
+ # PREF (signature header prefix),
+ # 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
+
+ # Fix keyid in the prefix.
+ if [[ $PREF =~ K ]]; then
+ keyid=$(_keyid "$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: $keyid"
+ PREF=$(echo "$PREF" | sed "s/K/$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 "$TYPE")" "$PREF.*" || 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")" "$FILE.sig2" "$PREF"
+
+ # 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 $OK
+}
+
+# Test verify operation
+check_verify() {
+ # Arguments are passed via global vars:
+ # TYPE (ima or evm),
+ # KEY,
+ # ALG (hash algo),
+ # OPTS (additional options for evmctl),
+ # FILE (filename to verify).
+ local "$@"
+
+ 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 $SKIP
+ fi
+
+ ADD_TEXT_FOR="$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 pref="$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
+ PREF=$pref
+ OPTS=$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" PREF=0x05
+ # Cannot be verified
+
+ # Test -i (immutable)
+ expect_pass check_sign OPTS="$OPTS -i" PREF=0x0303
+ # Cannot be verified
+}
+
+# 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 PREF=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 0x030201K0080
+sign_verify rsa1024 sha1 0x030202K0080
+sign_verify rsa1024 sha224 0x030207K0080
+sign_verify rsa1024 sha256 0x030204K0080
+ try_different_keys
+ try_different_sigs
+sign_verify rsa1024 sha384 0x030205K0080
+sign_verify rsa1024 sha512 0x030206K0080
+sign_verify rsa1024 rmd160 0x030203K0080
+
+# Test v2 signatures with EC-RDSA
+_enable_gost_engine
+sign_verify gost2012_256-A md_gost12_256 0x030212K0040
+sign_verify gost2012_256-B md_gost12_256 0x030212K0040
+sign_verify gost2012_256-C md_gost12_256 0x030212K0040
+sign_verify gost2012_512-A md_gost12_512 0x030213K0080
+sign_verify gost2012_512-B md_gost12_512 0x030213K0080
+# Test if signing with wrong key length does not work.
+expect_fail \
+ check_sign TYPE=ima KEY=gost2012_512-B ALG=md_gost12_256 PREF=0x0302 OPTS=
+expect_fail \
+ check_sign TYPE=ima KEY=gost2012_256-B ALG=md_gost12_512 PREF=0x0302 OPTS=
+
This commit adds (evm) sign, (evm) verify, ima_sign, and ima_verify tests for different algos. Signed-off-by: Vitaly Chikunov <vt@altlinux.org> --- tests/Makefile.am | 7 +- tests/gen-keys.sh | 97 +++++++++++++ tests/sign_verify.test | 364 +++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 467 insertions(+), 1 deletion(-) create mode 100755 tests/gen-keys.sh create mode 100755 tests/sign_verify.test