lib/hx509/env.c

   1 /*
   2  * Copyright (c) 2007 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 #include "hx_locl.h"
  35 RCSID("$Id$");
  36
  37 /**
  38  * @page page_env Hx509 enviroment functions
  39  *
  40  * See the library functions here: @ref hx509_env
  41  */
  42
  43 struct hx509_env {
  44     struct {
  45         char *key;
  46         char *value;
  47     } *val;
  48     size_t len;
  49 };
  50
  51 /**
  52  * Allocate a new hx509_env container object.
  53  *
  54  * @param context A hx509 context.
  55  * @param env return a hx509_env structure, free with hx509_env_free().
  56  *
  57  * @return An hx509 error code, see hx509_get_error_string().
  58  *
  59  * @ingroup hx509_env
  60  */
  61
  62 int
  63 hx509_env_init(hx509_context context, hx509_env *env)
  64 {
  65     *env = calloc(1, sizeof(**env));
  66     if (*env == NULL) {
  67         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
  68         return ENOMEM;
  69     }
  70     return 0;
  71 }
  72
  73 /**
  74  * Add a new key/value pair to the hx509_env.
  75  *
  76  * @param context A hx509 context.
  77  * @param env enviroment to add the enviroment variable too.
  78  * @param key key to add
  79  * @param value value to add
  80  *
  81  * @return An hx509 error code, see hx509_get_error_string().
  82  *
  83  * @ingroup hx509_env
  84  */
  85
  86 int
  87 hx509_env_add(hx509_context context, hx509_env env,
  88               const char *key, const char *value)
  89 {
  90     void *ptr;
  91
  92     ptr = realloc(env->val, sizeof(env->val[0]) * (env->len + 1));
  93     if (ptr == NULL) {
  94         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
  95         return ENOMEM;
  96     }
  97     env->val = ptr;
  98     env->val[env->len].key = strdup(key);
  99     if (env->val[env->len].key == NULL) {
 100         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
 101         return ENOMEM;
 102     }
 103     env->val[env->len].value = strdup(value);
 104     if (env->val[env->len].value == NULL) {
 105         free(env->val[env->len].key);
 106         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
 107         return ENOMEM;
 108     }
 109     env->len++;
 110     return 0;
 111 }
 112
 113 /**
 114  * Search the hx509_env for a key.
 115  *
 116  * @param context A hx509 context.
 117  * @param env enviroment to add the enviroment variable too.
 118  * @param key key to search for.
 119  * @param len length of key.
 120  *
 121  * @return the value if the key is found, NULL otherwise.
 122  *
 123  * @ingroup hx509_env
 124  */
 125
 126 const char *
 127 hx509_env_lfind(hx509_context context, hx509_env env,
 128                 const char *key, size_t len)
 129 {
 130     size_t i;
 131
 132     for (i = 0; i < env->len; i++) {
 133         char *s = env->val[i].key;
 134         if (strncmp(key, s, len) == 0 && s[len] == '\0')
 135             return env->val[i].value;
 136     }
 137     return NULL;
 138 }
 139
 140 /**
 141  * Free an hx509_env enviroment context.
 142  *
 143  * @param env the enviroment to free.
 144  *
 145  * @ingroup hx509_env
 146  */
 147
 148 void
 149 hx509_env_free(hx509_env *env)
 150 {
 151     size_t i;
 152
 153     for (i = 0; i < (*env)->len; i++) {
 154         free((*env)->val[i].key);
 155         free((*env)->val[i].value);
 156     }
 157     free((*env)->val);
 158     free(*env);
 159     *env = NULL;
 160 }
 161