fuzz: Add fuzzing boilerplate

6 years ago · 157742be7d
parent 4d0795bcef
commit 157742be7d
6 changed files with 75 additions and 8 deletions
--- a/Makefile.am
+++ b/Makefile.am
@ -1,5 +1,9 @@
 SUBDIRS = src man conf init testing

+if USE_FUZZING
+  SUBDIRS += fuzz
+endif
+
 if USE_SCRIPTS
  SUBDIRS += scripts
 endif
--- a/configure.ac
+++ b/configure.ac
@ -277,6 +277,7 @@ ARG_ENABL_SET([cmd],            [enable the command line IKE client charon-cmd.]
 ARG_ENABL_SET([conftest],       [enforce Suite B conformance test framework.])
 ARG_ENABL_SET([dumm],           [enable the DUMM UML test framework.])
 ARG_ENABL_SET([fast],           [enable libfast (FastCGI Application Server w/ templates.])
+ARG_ENABL_SET([fuzzing],        [enable fuzzing scripts (found in directory fuzz).])
 ARG_ENABL_SET([libipsec],       [enable user space IPsec implementation.])
 ARG_ENABL_SET([manager],        [enable web management console (proof of concept).])
 ARG_ENABL_SET([medcli],         [enable mediation client configuration database plugin.])
@ -1263,6 +1264,11 @@ if test x$coverage = xtrue; then
 	CFLAGS="${CFLAGS} -g -O0"
 fi

+if test x$fuzzing = xtrue; then
+	AC_MSG_NOTICE([fuzzing enabled, modifying CFLAGS])
+	CFLAGS="${CFLAGS} -fsanitize-coverage=trace-pc-guard -fsanitize=address"
+fi
+
 if test x$ruby_gems = xtrue; then
 	AC_PATH_PROG([GEM], [gem], [], [$PATH:/bin:/usr/bin:/usr/local/bin])
 	if test x$GEM = x; then
@ -1309,6 +1315,7 @@ attest_plugins=
 scepclient_plugins=
 pki_plugins=
 scripts_plugins=
+fuzz_plugins=
 manager_plugins=
 medsrv_plugins=
 nm_plugins=
@ -1332,21 +1339,21 @@ ADD_PLUGIN([aes],                  [s charon scepclient pki scripts nm cmd])
 ADD_PLUGIN([des],                  [s charon scepclient pki scripts nm cmd])
 ADD_PLUGIN([blowfish],             [s charon scepclient pki scripts nm cmd])
 ADD_PLUGIN([rc2],                  [s charon scepclient pki scripts nm cmd])
-ADD_PLUGIN([sha2],                 [s charon scepclient pki scripts medsrv attest nm cmd aikgen])
-ADD_PLUGIN([sha3],                 [s charon scepclient pki scripts medsrv attest nm cmd aikgen])
-ADD_PLUGIN([sha1],                 [s charon scepclient pki scripts manager medsrv attest nm cmd aikgen])
+ADD_PLUGIN([sha2],                 [s charon scepclient pki scripts medsrv attest nm cmd aikgen fuzz])
+ADD_PLUGIN([sha3],                 [s charon scepclient pki scripts medsrv attest nm cmd aikgen fuzz])
+ADD_PLUGIN([sha1],                 [s charon scepclient pki scripts manager medsrv attest nm cmd aikgen fuzz])
 ADD_PLUGIN([md4],                  [s charon scepclient pki nm cmd])
 ADD_PLUGIN([md5],                  [s charon scepclient pki scripts attest nm cmd aikgen])
 ADD_PLUGIN([mgf1],                 [s charon scepclient pki scripts medsrv attest nm cmd aikgen])
 ADD_PLUGIN([rdrand],               [s charon scepclient pki scripts medsrv attest nm cmd aikgen])
 ADD_PLUGIN([random],               [s charon scepclient pki scripts manager medsrv attest nm cmd aikgen])
 ADD_PLUGIN([nonce],                [s charon nm cmd aikgen])
-ADD_PLUGIN([x509],                 [s charon scepclient pki scripts attest nm cmd aikgen])
+ADD_PLUGIN([x509],                 [s charon scepclient pki scripts attest nm cmd aikgen fuzz])
 ADD_PLUGIN([revocation],           [s charon pki nm cmd])
 ADD_PLUGIN([constraints],          [s charon nm cmd])
 ADD_PLUGIN([acert],                [s charon])
 ADD_PLUGIN([pubkey],               [s charon cmd aikgen])
-ADD_PLUGIN([pkcs1],                [s charon scepclient pki scripts manager medsrv attest nm cmd aikgen])
+ADD_PLUGIN([pkcs1],                [s charon scepclient pki scripts manager medsrv attest nm cmd aikgen fuzz])
 ADD_PLUGIN([pkcs7],                [s charon scepclient pki scripts nm cmd])
 ADD_PLUGIN([pkcs8],                [s charon scepclient pki scripts manager medsrv attest nm cmd])
 ADD_PLUGIN([pkcs12],               [s charon scepclient pki scripts cmd])
@ -1355,13 +1362,13 @@ ADD_PLUGIN([dnskey],               [s charon pki])
 ADD_PLUGIN([sshkey],               [s charon pki nm cmd])
 ADD_PLUGIN([dnscert],              [c charon])
 ADD_PLUGIN([ipseckey],             [c charon])
-ADD_PLUGIN([pem],                  [s charon scepclient pki scripts manager medsrv attest nm cmd aikgen])
+ADD_PLUGIN([pem],                  [s charon scepclient pki scripts manager medsrv attest nm cmd aikgen fuzz])
 ADD_PLUGIN([padlock],              [s charon])
 ADD_PLUGIN([openssl],              [s charon scepclient pki scripts manager medsrv attest nm cmd aikgen])
 ADD_PLUGIN([gcrypt],               [s charon scepclient pki scripts manager medsrv attest nm cmd aikgen])
 ADD_PLUGIN([af-alg],               [s charon scepclient pki scripts medsrv attest nm cmd aikgen])
 ADD_PLUGIN([fips-prf],             [s charon nm cmd])
-ADD_PLUGIN([gmp],                  [s charon scepclient pki scripts manager medsrv attest nm cmd aikgen])
+ADD_PLUGIN([gmp],                  [s charon scepclient pki scripts manager medsrv attest nm cmd aikgen fuzz])
 ADD_PLUGIN([curve25519],           [s charon pki scripts nm cmd])
 ADD_PLUGIN([agent],                [s charon nm cmd])
 ADD_PLUGIN([keychain],             [s charon cmd])
@ -1462,6 +1469,7 @@ AC_SUBST(attest_plugins)
 AC_SUBST(scepclient_plugins)
 AC_SUBST(pki_plugins)
 AC_SUBST(scripts_plugins)
+AC_SUBST(fuzz_plugins)
 AC_SUBST(manager_plugins)
 AC_SUBST(medsrv_plugins)
 AC_SUBST(nm_plugins)
@ -1646,6 +1654,7 @@ AM_CONDITIONAL(USE_NM, test x$nm = xtrue)
 AM_CONDITIONAL(USE_PKI, test x$pki = xtrue)
 AM_CONDITIONAL(USE_SCEPCLIENT, test x$scepclient = xtrue)
 AM_CONDITIONAL(USE_SCRIPTS, test x$scripts = xtrue)
+AM_CONDITIONAL(USE_FUZZING, test x$fuzzing = xtrue)
 AM_CONDITIONAL(USE_CONFTEST, test x$conftest = xtrue)
 AM_CONDITIONAL(USE_LIBSTRONGSWAN, test x$charon = xtrue -o x$pki = xtrue -o x$scepclient = xtrue -o x$conftest = xtrue -o x$fast = xtrue -o x$imcv = xtrue -o x$nm = xtrue -o x$tkm = xtrue -o x$cmd = xtrue -o x$tls = xtrue -o x$tnc_tnccs = xtrue -o x$aikgen = xtrue -o x$svc = xtrue -o x$systemd = xtrue)
 AM_CONDITIONAL(USE_LIBCHARON, test x$charon = xtrue -o x$conftest = xtrue -o x$nm = xtrue -o x$tkm = xtrue -o x$cmd = xtrue -o x$svc = xtrue -o x$systemd = xtrue)
@ -1734,6 +1743,7 @@ AC_SUBST(strongswan_options)
 AC_CONFIG_FILES([
 	Makefile
 	conf/Makefile
+	fuzz/Makefile
 	man/Makefile
 	init/Makefile
 	init/systemd/Makefile
--- a/fuzz/.gitignore
+++ b/fuzz/.gitignore
@ -0,0 +1 @@
+fuzz_certs
--- a/fuzz/Makefile.am
+++ b/fuzz/Makefile.am
@ -0,0 +1,12 @@
+AM_CPPFLAGS = \
+	-I$(top_srcdir)/src/libstrongswan \
+	-DPLUGINDIR=\""$(abs_top_builddir)/src/libstrongswan/plugins\"" \
+	-DPLUGINS="\"${fuzz_plugins}\""
+
+noinst_PROGRAMS = fuzz_certs
+
+fuzz_certs_SOURCES = fuzz_certs.c
+
+fuzz_certs_LDFLAGS = libFuzzer.a -lstdc++
+
+fuzz_certs_LDADD = $(top_builddir)/src/libstrongswan/libstrongswan.la
--- a/fuzz/fuzz_certs.c
+++ b/fuzz/fuzz_certs.c
@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2017 Tobias Brunner
+ * HSR Hochschule fuer Technik Rapperswil
+ *
+ * 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 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * 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.
+ */
+
+#include <library.h>
+#include <utils/debug.h>
+
+int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len)
+{
+	certificate_t *cert;
+	chunk_t chunk;
+
+	dbg_default_set_level(-1);
+	library_init(NULL, "fuzz_certs");
+	plugin_loader_add_plugindirs(PLUGINDIR, PLUGINS);
+	if (!lib->plugins->load(lib->plugins, PLUGINS))
+	{
+		return 1;
+	}
+
+	chunk = chunk_create((u_char*)buf, len);
+	cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
+							  BUILD_BLOB, chunk, BUILD_END);
+	DESTROY_IF(cert);
+
+	lib->plugins->unload(lib->plugins);
+	library_deinit();
+	return 0;
+}
--- a/scripts/test.sh
+++ b/scripts/test.sh
@ -32,7 +32,7 @@ printf-builtin)
 all|coverage)
 	CONFIG="--enable-all --disable-android-dns --disable-android-log
 			--disable-dumm --disable-kernel-pfroute --disable-keychain
-			--disable-lock-profiler --disable-padlock
+			--disable-lock-profiler --disable-padlock --disable-fuzzing
 			--disable-osx-attr --disable-tkm --disable-uci
 			--disable-systemd --disable-soup --disable-unwind-backtraces
 			--disable-svc --disable-dbghelp-backtraces --disable-socket-win