stringprep.c

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/*
 * Copyright (c) 2004, 2006, 2008 Kungliga Tekniska H鰃skolan
 * (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 <strings.h>
#include <errno.h>

RCSID("$Id: stringprep.c 22593 2008-02-12 11:58:01Z lha $");

/**
 * Process a input UCS4 string according a string-prep profile.
 *
 * @param in input UCS4 string to process
 * @param in_len length of the input string
 * @param out output UCS4 string
 * @param out_len length of the output string.
 * @param flags stringprep profile.
 *
 * @return returns 0 on success, an wind error code otherwise
 * @ingroup wind
 */

int
wind_stringprep(const uint32_t *in, size_t in_len,
		uint32_t *out, size_t *out_len,
		wind_profile_flags flags)
{
    size_t tmp_len = in_len * 3;
    uint32_t *tmp = malloc(tmp_len * sizeof(uint32_t));
    int ret;
    size_t olen;

    if (tmp == NULL)
	return ENOMEM;

    ret = _wind_stringprep_map(in, in_len, tmp, &tmp_len, flags);
    if (ret) {
	free(tmp);
	return ret;
    }

    olen = *out_len;
    ret = _wind_stringprep_normalize(tmp, tmp_len, tmp, &olen);
    if (ret) {
	free(tmp);
	return ret;
    }
    ret = _wind_stringprep_prohibited(tmp, olen, flags);
    if (ret) {
	free(tmp);
	return ret;
    }
    ret = _wind_stringprep_testbidi(tmp, olen, flags);
    if (ret) {
	free(tmp);
	return ret;
    }

    /* Insignificant Character Handling for ldap-prep */
    if (flags & WIND_PROFILE_LDAP_CASE_EXACT_ATTRIBUTE) {
	ret = _wind_ldap_case_exact_attribute(tmp, olen, out, out_len);
#if 0
    } else if (flags & WIND_PROFILE_LDAP_CASE_EXACT_ASSERTION) {
    } else if (flags & WIND_PROFILE_LDAP_NUMERIC) {
    } else if (flags & WIND_PROFILE_LDAP_TELEPHONE) {
#endif
    } else {
	memcpy(out, tmp, sizeof(out[0]) * olen);
	*out_len = olen;
    }
    free(tmp);

    return ret;
}

static struct {
    const char *name;
    wind_profile_flags flags;
} profiles[] = {
    { "nameprep", WIND_PROFILE_NAME },
    { "saslprep", WIND_PROFILE_SASL },
    { "ldapprep", WIND_PROFILE_LDAP }
};

/**
 * Try to find the profile given a name.
 *
 * @param name name of the profile.
 * @param flags the resulting profile.
 *
 * @return returns 0 on success, an wind error code otherwise
 * @ingroup wind
 */

int
wind_profile(const char *name, wind_profile_flags *flags)
{
    unsigned int i;

    for (i = 0; i < sizeof(profiles)/sizeof(profiles[0]); i++) {
	if (strcasecmp(profiles[i].name, name) == 0) {
	    *flags = profiles[i].flags;
	    return 0;
	}
    }
    return WIND_ERR_NO_PROFILE;
}