fuzzer.c

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/*
 *   This library is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU Lesser General Public
 *   License as published by the Free Software Foundation; either
 *   version 2.1 of the License, or (at your option) any later version.
 *
 *   This library 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
 *   Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */
 
/** Functions to manipulate DNS labels
 *
 * @file src/lib/util/fuzzer.c
 *
 * @copyright 2021 Network RADIUS SAS (legal@networkradius.com)
 */
RCSID("$Id: 864f2e54299e1b7db03d32a26fbf8173626d8688 $")
 
#include <freeradius-devel/io/test_point.h>
 
static int decode_test_ctx(void **out, UNUSED TALLOC_CTX *ctx, UNUSED fr_dict_t const *dict)
{
        *out = NULL;
        return 0;
}
 
/*
 *      Try to parse the input as a (mostly text) string.
 *
 *      This isn't perfect, but it allows simple fuzzing of the parsers for all of the data types.
 */
static ssize_t util_decode_proto(TALLOC_CTX *ctx, UNUSED fr_pair_list_t *out, uint8_t const *data, size_t data_len,
                                 UNUSED void *proto_ctx)
{
        ssize_t rcode;
        fr_type_t type;
        fr_value_box_t *box;
 
        if (data_len < 1) return data_len;      /* We want to check zero length input too */
 
        type = data[0] % (FR_TYPE_MAX + 1);
        switch (type) {
        case FR_TYPE_LEAF:
                break;
 
        default:
                return data_len;
        }
 
        box = fr_value_box_alloc(ctx, type, NULL);
        if (!box) return -1;
 
        rcode = fr_value_box_from_str(box, box, type, NULL, (char const *)data + 1, data_len - 1, NULL, true);
        talloc_free(box);
        return rcode;
}
 
extern fr_test_point_proto_decode_t util_tp_decode_proto;
fr_test_point_proto_decode_t util_tp_decode_proto = {
        .test_ctx       = decode_test_ctx,
        .func           = util_decode_proto
};