env.c revision 178825 
1/*
2 * Copyright (c) 2007 Kungliga Tekniska H�gskolan
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"
35RCSID("$Id: env.c 22349 2007-12-26 19:32:49Z lha $");
36
37/**
38 * @page page_env Hx509 enviroment functions
39 *
40 * See the library functions here: @ref hx509_env
41 */
42
43struct 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
62int
63hx509_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
86int
87hx509_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
126const char *
127hx509_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
148void
149hx509_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
162