crypto/external/bsd/heimdal/dist/lib/hx509/env.c

   1 /*      $NetBSD: env.c,v 1.1.1.1 2011/04/13 18:15:10 elric Exp $        */
   2
   3 /*
   4  * Copyright (c) 2007 - 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 #include "hx_locl.h"
  37
  38 /**
  39  * @page page_env Hx509 enviroment functions
  40  *
  41  * See the library functions here: @ref hx509_env
  42  */
  43
  44 /**
  45  * Add a new key/value pair to the hx509_env.
  46  *
  47  * @param context A hx509 context.
  48  * @param env enviroment to add the enviroment variable too.
  49  * @param key key to add
  50  * @param value value to add
  51  *
  52  * @return An hx509 error code, see hx509_get_error_string().
  53  *
  54  * @ingroup hx509_env
  55  */
  56
  57 int
  58 hx509_env_add(hx509_context context, hx509_env *env,
  59               const char *key, const char *value)
  60 {
  61     hx509_env n;
  62
  63     n = malloc(sizeof(*n));
  64     if (n == NULL) {
  65         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
  66         return ENOMEM;
  67     }
  68
  69     n->type = env_string;
  70     n->next = NULL;
  71     n->name = strdup(key);
  72     if (n->name == NULL) {
  73         free(n);
  74         return ENOMEM;
  75     }
  76     n->u.string = strdup(value);
  77     if (n->u.string == NULL) {
  78         free(n->name);
  79         free(n);
  80         return ENOMEM;
  81     }
  82
  83     /* add to tail */
  84     if (*env) {
  85         hx509_env e = *env;
  86         while (e->next)
  87             e = e->next;
  88         e->next = n;
  89     } else
  90         *env = n;
  91
  92     return 0;
  93 }
  94
  95 /**
  96  * Add a new key/binding pair to the hx509_env.
  97  *
  98  * @param context A hx509 context.
  99  * @param env enviroment to add the enviroment variable too.
 100  * @param key key to add
 101  * @param list binding list to add
 102  *
 103  * @return An hx509 error code, see hx509_get_error_string().
 104  *
 105  * @ingroup hx509_env
 106  */
 107
 108 int
 109 hx509_env_add_binding(hx509_context context, hx509_env *env,
 110                       const char *key, hx509_env list)
 111 {
 112     hx509_env n;
 113
 114     n = malloc(sizeof(*n));
 115     if (n == NULL) {
 116         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
 117         return ENOMEM;
 118     }
 119
 120     n->type = env_list;
 121     n->next = NULL;
 122     n->name = strdup(key);
 123     if (n->name == NULL) {
 124         free(n);
 125         return ENOMEM;
 126     }
 127     n->u.list = list;
 128
 129     /* add to tail */
 130     if (*env) {
 131         hx509_env e = *env;
 132         while (e->next)
 133             e = e->next;
 134         e->next = n;
 135     } else
 136         *env = n;
 137
 138     return 0;
 139 }
 140
 141
 142 /**
 143  * Search the hx509_env for a length based key.
 144  *
 145  * @param context A hx509 context.
 146  * @param env enviroment to add the enviroment variable too.
 147  * @param key key to search for.
 148  * @param len length of key.
 149  *
 150  * @return the value if the key is found, NULL otherwise.
 151  *
 152  * @ingroup hx509_env
 153  */
 154
 155 const char *
 156 hx509_env_lfind(hx509_context context, hx509_env env,
 157                 const char *key, size_t len)
 158 {
 159     while(env) {
 160         if (strncmp(key, env->name ,len) == 0
 161             && env->name[len] == '\0' && env->type == env_string)
 162             return env->u.string;
 163         env = env->next;
 164     }
 165     return NULL;
 166 }
 167
 168 /**
 169  * Search the hx509_env for a key.
 170  *
 171  * @param context A hx509 context.
 172  * @param env enviroment to add the enviroment variable too.
 173  * @param key key to search for.
 174  *
 175  * @return the value if the key is found, NULL otherwise.
 176  *
 177  * @ingroup hx509_env
 178  */
 179
 180 const char *
 181 hx509_env_find(hx509_context context, hx509_env env, const char *key)
 182 {
 183     while(env) {
 184         if (strcmp(key, env->name) == 0 && env->type == env_string)
 185             return env->u.string;
 186         env = env->next;
 187     }
 188     return NULL;
 189 }
 190
 191 /**
 192  * Search the hx509_env for a binding.
 193  *
 194  * @param context A hx509 context.
 195  * @param env enviroment to add the enviroment variable too.
 196  * @param key key to search for.
 197  *
 198  * @return the binding if the key is found, NULL if not found.
 199  *
 200  * @ingroup hx509_env
 201  */
 202
 203 hx509_env
 204 hx509_env_find_binding(hx509_context context,
 205                        hx509_env env,
 206                        const char *key)
 207 {
 208     while(env) {
 209         if (strcmp(key, env->name) == 0 && env->type == env_list)
 210             return env->u.list;
 211         env = env->next;
 212     }
 213     return NULL;
 214 }
 215
 216 static void
 217 env_free(hx509_env b)
 218 {
 219     while(b) {
 220         hx509_env next = b->next;
 221
 222         if (b->type == env_string)
 223             free(b->u.string);
 224         else if (b->type == env_list)
 225             env_free(b->u.list);
 226
 227         free(b->name);
 228         free(b);
 229         b = next;
 230     }
 231 }
 232
 233 /**
 234  * Free an hx509_env enviroment context.
 235  *
 236  * @param env the enviroment to free.
 237  *
 238  * @ingroup hx509_env
 239  */
 240
 241 void
 242 hx509_env_free(hx509_env *env)
 243 {
 244     if (*env)
 245         env_free(*env);
 246     *env = NULL;
 247 }