crypto/dist/heimdal/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("$Heimdal: env.c 22349 2007-12-26 19:32:49Z lha $"
  36         "$NetBSD$");
  37
  38 /**
  39  * @page page_env Hx509 enviroment functions
  40  *
  41  * See the library functions here: @ref hx509_env
  42  */
  43
  44 struct hx509_env {
  45     struct {
  46         char *key;
  47         char *value;
  48     } *val;
  49     size_t len;
  50 };
  51
  52 /**
  53  * Allocate a new hx509_env container object.
  54  *
  55  * @param context A hx509 context.
  56  * @param env return a hx509_env structure, free with hx509_env_free().
  57  *
  58  * @return An hx509 error code, see hx509_get_error_string().
  59  *
  60  * @ingroup hx509_env
  61  */
  62
  63 int
  64 hx509_env_init(hx509_context context, hx509_env *env)
  65 {
  66     *env = calloc(1, sizeof(**env));
  67     if (*env == NULL) {
  68         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
  69         return ENOMEM;
  70     }
  71     return 0;
  72 }
  73
  74 /**
  75  * Add a new key/value pair to the hx509_env.
  76  *
  77  * @param context A hx509 context.
  78  * @param env enviroment to add the enviroment variable too.
  79  * @param key key to add
  80  * @param value value to add
  81  *
  82  * @return An hx509 error code, see hx509_get_error_string().
  83  *
  84  * @ingroup hx509_env
  85  */
  86
  87 int
  88 hx509_env_add(hx509_context context, hx509_env env,
  89               const char *key, const char *value)
  90 {
  91     void *ptr;
  92
  93     ptr = realloc(env->val, sizeof(env->val[0]) * (env->len + 1));
  94     if (ptr == NULL) {
  95         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
  96         return ENOMEM;
  97     }
  98     env->val = ptr;
  99     env->val[env->len].key = strdup(key);
 100     if (env->val[env->len].key == NULL) {
 101         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
 102         return ENOMEM;
 103     }
 104     env->val[env->len].value = strdup(value);
 105     if (env->val[env->len].value == NULL) {
 106         free(env->val[env->len].key);
 107         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
 108         return ENOMEM;
 109     }
 110     env->len++;
 111     return 0;
 112 }
 113
 114 /**
 115  * Search the hx509_env for a key.
 116  *
 117  * @param context A hx509 context.
 118  * @param env enviroment to add the enviroment variable too.
 119  * @param key key to search for.
 120  * @param len length of key.
 121  *
 122  * @return the value if the key is found, NULL otherwise.
 123  *
 124  * @ingroup hx509_env
 125  */
 126
 127 const char *
 128 hx509_env_lfind(hx509_context context, hx509_env env,
 129                 const char *key, size_t len)
 130 {
 131     size_t i;
 132
 133     for (i = 0; i < env->len; i++) {
 134         char *s = env->val[i].key;
 135         if (strncmp(key, s, len) == 0 && s[len] == '\0')
 136             return env->val[i].value;
 137     }
 138     return NULL;
 139 }
 140
 141 /**
 142  * Free an hx509_env enviroment context.
 143  *
 144  * @param env the enviroment to free.
 145  *
 146  * @ingroup hx509_env
 147  */
 148
 149 void
 150 hx509_env_free(hx509_env *env)
 151 {
 152     size_t i;
 153
 154     for (i = 0; i < (*env)->len; i++) {
 155         free((*env)->val[i].key);
 156         free((*env)->val[i].value);
 157     }
 158     free((*env)->val);
 159     free(*env);
 160     *env = NULL;
 161 }
 162