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