/*
 * Copyright(c) 2017 Tim Ruehsen
 *
 * 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 3 of the License, 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <config.h>

#include <assert.h> /* assert */
#include <stdint.h> /* uint8_t, uint32_t */
#include <stdlib.h> /* malloc, free */
#include <string.h> /* memcpy */

#include "stringprep.h"
#include "pr29.h"
#include "tld.h"
#include "idn-free.h"
#include "fuzzer.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
	char *wdata;
	char *label;
	char *utf8_seq;
	char *out;
        uint32_t cp;
	size_t errpos;

	if (size > 2048)
		return 0;

	wdata = (char *) malloc(size + 1);
	label = (char *) malloc(size + 1);
	utf8_seq = (char *) malloc(6);
	assert(wdata != NULL);
	assert(label != NULL);
	assert(utf8_seq != NULL);

	/* 0 terminate */
	memcpy(label, data, size);
	label[size] = 0;

	stringprep_check_version(label);

	if (stringprep_profile(label, &out, "Nodeprep", (Stringprep_profile_flags) 0) == STRINGPREP_OK)
		idn_free(out);

	pr29_8z(label); /* internally calls stringprep_utf8_to_ucs4() */

#ifdef WITH_TLD
	if (tld_get_z(label, &out) == TLD_SUCCESS) /* internally calls tld_get_4() */
		idn_free(out);
	const Tld_table *tld = tld_default_table("fr", NULL);
	tld_check_8z(label, &errpos, NULL);
	tld_check_lz(label, &errpos, NULL);
#endif

        out = stringprep_utf8_nfkc_normalize((char *)data, size);
        idn_free(out);

        cp = stringprep_utf8_to_unichar(label);
        stringprep_unichar_to_utf8(cp, utf8_seq);

	memcpy(wdata, data, size);
	wdata[size] = 0;
	stringprep(wdata, size, (Stringprep_profile_flags) 0, stringprep_nameprep);
	memcpy(wdata, data, size);
	wdata[size] = 0;
	stringprep(wdata, size, STRINGPREP_NO_UNASSIGNED, stringprep_nameprep);

	if ((size & 3) == 0) {
		uint32_t *u32 = (uint32_t *) malloc(size + 4);

		assert(u32 != NULL);

		memcpy(u32, data, size);
		u32[size / 4] = 0;
		stringprep_4zi(u32, size / 4, (Stringprep_profile_flags) 0, stringprep_xmpp_nodeprep);

		memcpy(u32, data, size);
		u32[size / 4] = 0;
#ifdef WITH_TLD
		if (tld_get_4z(u32, &out) == TLD_SUCCESS) /* internally calls tld_get_4() */
			idn_free(out);

		tld_check_4tz(u32, &errpos, tld);
		tld_check_4z(u32, &errpos, NULL);
#endif

		free(u32);
	}

	free(utf8_seq);
	free(label);
	free(wdata);

	return 0;
}