1 /*	$NetBSD: stringprep.c,v 1.1.1.1 2011/04/13 18:16:00 elric Exp $	*/
2 
3 /*
4  * Copyright (c) 2004, 2006, 2008 Kungliga Tekniska Högskolan
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 
57 int
58 wind_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 
116 const static 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 
135 int
136 wind_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