oss-fuzz: Add new fuzzer targeting libtls

Closes strongswan/strongswan#3004

Signed-off-by: Arthur Chan <[email protected]>
Co-authored-by: Tobias Brunner <[email protected]>

fuzz/Makefile.am

@@ -5,6 +5,7 @@ AM_CPPFLAGS = @CPPFLAGS@ \
 	-I$(top_srcdir)/src/libimcv \
 	-I$(top_srcdir)/src/libtncif \
 	-I$(top_srcdir)/src/libtpmtss \
+	-I$(top_srcdir)/src/libtls \
 	-I$(top_srcdir)/src/libtnccs \
 	-I$(top_srcdir)/src/libtnccs/plugins/tnccs_20 \
 	-I$(top_srcdir)/src/libradius
@@ -47,6 +48,10 @@ radius_ldflags = \
 	$(top_builddir)/src/libradius/.libs/libradius.a \
 	$(fuzz_ldflags)
 
+tls_ldflags = \
+	$(top_builddir)/src/libtls/.libs/libtls.a \
+	$(fuzz_ldflags)
+
 # fuzzers that use crypto plugins in a significant way
 fuzzers_with_plugins = \
 	fuzz_certs fuzz_crls fuzz_ocsp_req fuzz_ocsp_rsp
@@ -55,7 +60,7 @@ fuzzers_with_def = $(fuzzers_with_plugins:%=%_def)
 fuzzers_with_cus = $(fuzzers_with_plugins:%=%_cus)
 
 fuzzers_no_plugins = \
-	fuzz_ids fuzz_ike fuzz_pa_tnc fuzz_pb_tnc fuzz_radius fuzz_vici
+	fuzz_ids fuzz_ike fuzz_pa_tnc fuzz_pb_tnc fuzz_radius fuzz_tls fuzz_vici
 
 ALL_FUZZERS=$(fuzzers_with_def) $(fuzzers_with_cus) $(fuzzers_no_plugins)
 
@@ -102,6 +107,9 @@ fuzz_ike: fuzz_ike.c ${libfuzzer}
 fuzz_radius: fuzz_radius.c ${libfuzzer}
 	$(CC) $(fuzz_cppflags_def) $(CFLAGS) -o $@ $< $(radius_ldflags)
 
+fuzz_tls: fuzz_tls.c ${libfuzzer}
+	$(CC) $(fuzz_cppflags_def) $(CFLAGS) -o $@ $< $(tls_ldflags)
+
 fuzz_vici: fuzz_vici.c ${libfuzzer}
 	$(CC) $(AM_CPPFLAGS) $(CFLAGS) -o $@ $< $(charon_ldflags)