1/*	$NetBSD: stringprep.c,v 1.2 2017/01/28 21:31:50 christos Exp $	*/
2
3/*
4 * Copyright (c) 2004, 2006, 2008 Kungliga Tekniska H��gskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#ifdef HAVE_CONFIG_H
37#include <config.h>
38#endif
39#include "windlocl.h"
40#include <stdlib.h>
41#include <string.h>
42#include <errno.h>
43
44/**
45 * Process a input UCS4 string according a string-prep profile.
46 *
47 * @param in input UCS4 string to process
48 * @param in_len length of the input string
49 * @param out output UCS4 string
50 * @param out_len length of the output string.
51 * @param flags stringprep profile.
52 *
53 * @return returns 0 on success, an wind error code otherwise
54 * @ingroup wind
55 */
56
57int
58wind_stringprep(const uint32_t *in, size_t in_len,
59		uint32_t *out, size_t *out_len,
60		wind_profile_flags flags)
61{
62    size_t tmp_len = in_len * 3;
63    uint32_t *tmp;
64    int ret;
65    size_t olen;
66
67    if (in_len == 0) {
68	*out_len = 0;
69	return 0;
70    }
71
72    tmp = malloc(tmp_len * sizeof(uint32_t));
73    if (tmp == NULL)
74	return ENOMEM;
75
76    ret = _wind_stringprep_map(in, in_len, tmp, &tmp_len, flags);
77    if (ret) {
78	free(tmp);
79	return ret;
80    }
81
82    olen = *out_len;
83    ret = _wind_stringprep_normalize(tmp, tmp_len, tmp, &olen);
84    if (ret) {
85	free(tmp);
86	return ret;
87    }
88    ret = _wind_stringprep_prohibited(tmp, olen, flags);
89    if (ret) {
90	free(tmp);
91	return ret;
92    }
93    ret = _wind_stringprep_testbidi(tmp, olen, flags);
94    if (ret) {
95	free(tmp);
96	return ret;
97    }
98
99    /* Insignificant Character Handling for ldap-prep */
100    if (flags & WIND_PROFILE_LDAP_CASE_EXACT_ATTRIBUTE) {
101	ret = _wind_ldap_case_exact_attribute(tmp, olen, out, out_len);
102#if 0
103    } else if (flags & WIND_PROFILE_LDAP_CASE_EXACT_ASSERTION) {
104    } else if (flags & WIND_PROFILE_LDAP_NUMERIC) {
105    } else if (flags & WIND_PROFILE_LDAP_TELEPHONE) {
106#endif
107    } else {
108	memcpy(out, tmp, sizeof(out[0]) * olen);
109	*out_len = olen;
110    }
111    free(tmp);
112
113    return ret;
114}
115
116static const struct {
117    const char *name;
118    wind_profile_flags flags;
119} profiles[] = {
120    { "nameprep", WIND_PROFILE_NAME },
121    { "saslprep", WIND_PROFILE_SASL },
122    { "ldapprep", WIND_PROFILE_LDAP }
123};
124
125/**
126 * Try to find the profile given a name.
127 *
128 * @param name name of the profile.
129 * @param flags the resulting profile.
130 *
131 * @return returns 0 on success, an wind error code otherwise
132 * @ingroup wind
133 */
134
135int
136wind_profile(const char *name, wind_profile_flags *flags)
137{
138    unsigned int i;
139
140    for (i = 0; i < sizeof(profiles)/sizeof(profiles[0]); i++) {
141	if (strcasecmp(profiles[i].name, name) == 0) {
142	    *flags = profiles[i].flags;
143	    return 0;
144	}
145    }
146    return WIND_ERR_NO_PROFILE;
147}
148