tests: JSON parser fuzzer

test-json can be used for fuzz testing the JSON parser implementation in
src/utils/json.c.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/utils/Makefile

@@ -19,6 +19,7 @@ LIB_OBJS= \
 	common.o \
 	crc32.o \
 	ip_addr.o \
+	json.o \
 	radiotap.o \
 	trace.o \
 	uuid.o \

tests/Makefile

@@ -61,6 +61,9 @@ test-https: test-https.o $(LIBS)
 test-https_server: test-https_server.o $(LIBS)
 	$(LDO) $(LDFLAGS) -o $@ $< $(LLIBS)
 
+test-json: test-json.o $(LIBS)
+	$(LDO) $(LDFLAGS) -o $@ $^ $(LLIBS)
+
 test-list: test-list.o $(LIBS)
 	$(LDO) $(LDFLAGS) -o $@ $^ $(LLIBS)
 
@@ -107,6 +110,7 @@ clean:
 	$(MAKE) -C ../src clean
 	rm -f $(TESTS) *~ *.o *.d
 	rm -f test-https
+	rm -f test-json
 	rm -f test-tls
 	rm -f test_x509v3_nist.out.*
 	rm -f test_x509v3_nist2.out.*

tests/test-json.c

@@ -0,0 +1,44 @@
+/*
+ * JSON parser - test program
+ * Copyright (c) 2019, Jouni Malinen <j@w1.fi>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "utils/includes.h"
+#include "utils/os.h"
+#include "utils/json.h"
+
+
+int main(int argc, char *argv[])
+{
+	char *buf;
+	size_t len;
+	struct json_token *root;
+
+	if (argc < 2)
+		return -1;
+
+	buf = os_readfile(argv[1], &len);
+	if (!buf)
+		return -1;
+
+	root = json_parse(buf, len);
+	os_free(buf);
+	if (root) {
+		size_t buflen = 10000;
+
+		buf = os_zalloc(buflen);
+		if (buf) {
+			json_print_tree(root, buf, buflen);
+			printf("%s\n", buf);
+			os_free(buf);
+		}
+		json_free(root);
+	} else {
+		printf("JSON parsing failed\n");
+	}
+
+	return 0;
+}