xref: /freebsd-10.1-release/crypto/heimdal/lib/wind/map.c

/*
 * Copyright (c) 2004 Kungliga Tekniska H��gskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "windlocl.h"

#include <stdlib.h>

#include "map_table.h"

static int
translation_cmp(const void *key, const void *data)
{
    const struct translation *t1 = (const struct translation *)key;
    const struct translation *t2 = (const struct translation *)data;

    return t1->key - t2->key;
}

int
_wind_stringprep_map(const uint32_t *in, size_t in_len,
		     uint32_t *out, size_t *out_len,
		     wind_profile_flags flags)
{
    unsigned i;
    unsigned o = 0;

    for (i = 0; i < in_len; ++i) {
	struct translation ts = {in[i]};
	const struct translation *s;

	s = (const struct translation *)
	    bsearch(&ts, _wind_map_table, _wind_map_table_size,
		    sizeof(_wind_map_table[0]),
		    translation_cmp);
	if (s != NULL && (s->flags & flags)) {
	    unsigned j;

	    for (j = 0; j < s->val_len; ++j) {
		if (o >= *out_len)
		    return WIND_ERR_OVERRUN;
		out[o++] = _wind_map_table_val[s->val_offset + j];
	    }
	} else {
	    if (o >= *out_len)
		return WIND_ERR_OVERRUN;
	    out[o++] = in[i];

	}
    }
    *out_len = o;
    return 0;
}