lib/wind/stringprep.c

   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
  55 int
  56 wind_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
 114 static 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
 133 int
 134 wind_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 }