lib/hx509/ks_mem.c

   1 /*
   2  * Copyright (c) 2005 - 2006 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
  36 /*
  37  * Should use two hash/tree certificates intead of a array.  Criteria
  38  * should be subject and subjectKeyIdentifier since those two are
  39  * commonly seached on in CMS and path building.
  40  */
  41
  42 struct mem_data {
  43     char *name;
  44     struct {
  45         unsigned long len;
  46         hx509_cert *val;
  47     } certs;
  48     hx509_private_key *keys;
  49 };
  50
  51 static int
  52 mem_init(hx509_context context,
  53          hx509_certs certs, void **data, int flags,
  54          const char *residue, hx509_lock lock)
  55 {
  56     struct mem_data *mem;
  57     mem = calloc(1, sizeof(*mem));
  58     if (mem == NULL)
  59         return ENOMEM;
  60     if (residue == NULL || residue[0] == '\0')
  61         residue = "anonymous";
  62     mem->name = strdup(residue);
  63     if (mem->name == NULL) {
  64         free(mem);
  65         return ENOMEM;
  66     }
  67     *data = mem;
  68     return 0;
  69 }
  70
  71 static int
  72 mem_free(hx509_certs certs, void *data)
  73 {
  74     struct mem_data *mem = data;
  75     unsigned long i;
  76
  77     for (i = 0; i < mem->certs.len; i++)
  78         hx509_cert_free(mem->certs.val[i]);
  79     free(mem->certs.val);
  80     for (i = 0; mem->keys && mem->keys[i]; i++)
  81         _hx509_private_key_free(&mem->keys[i]);
  82     free(mem->keys);
  83     free(mem->name);
  84     free(mem);
  85
  86     return 0;
  87 }
  88
  89 static int
  90 mem_add(hx509_context context, hx509_certs certs, void *data, hx509_cert c)
  91 {
  92     struct mem_data *mem = data;
  93     hx509_cert *val;
  94
  95     val = realloc(mem->certs.val,
  96                   (mem->certs.len + 1) * sizeof(mem->certs.val[0]));
  97     if (val == NULL)
  98         return ENOMEM;
  99
 100     mem->certs.val = val;
 101     mem->certs.val[mem->certs.len] = hx509_cert_ref(c);
 102     mem->certs.len++;
 103
 104     return 0;
 105 }
 106
 107 static int
 108 mem_iter_start(hx509_context context,
 109                hx509_certs certs,
 110                void *data,
 111                void **cursor)
 112 {
 113     unsigned long *iter = malloc(sizeof(*iter));
 114
 115     if (iter == NULL)
 116         return ENOMEM;
 117
 118     *iter = 0;
 119     *cursor = iter;
 120
 121     return 0;
 122 }
 123
 124 static int
 125 mem_iter(hx509_context contexst,
 126          hx509_certs certs,
 127          void *data,
 128          void *cursor,
 129          hx509_cert *cert)
 130 {
 131     unsigned long *iter = cursor;
 132     struct mem_data *mem = data;
 133
 134     if (*iter >= mem->certs.len) {
 135         *cert = NULL;
 136         return 0;
 137     }
 138
 139     *cert = hx509_cert_ref(mem->certs.val[*iter]);
 140     (*iter)++;
 141     return 0;
 142 }
 143
 144 static int
 145 mem_iter_end(hx509_context context,
 146              hx509_certs certs,
 147              void *data,
 148              void *cursor)
 149 {
 150     free(cursor);
 151     return 0;
 152 }
 153
 154 static int
 155 mem_getkeys(hx509_context context,
 156              hx509_certs certs,
 157              void *data,
 158              hx509_private_key **keys)
 159 {
 160     struct mem_data *mem = data;
 161     int i;
 162
 163     for (i = 0; mem->keys && mem->keys[i]; i++)
 164         ;
 165     *keys = calloc(i + 1, sizeof(**keys));
 166     for (i = 0; mem->keys && mem->keys[i]; i++) {
 167         (*keys)[i] = _hx509_private_key_ref(mem->keys[i]);
 168         if ((*keys)[i] == NULL) {
 169             while (--i >= 0)
 170                 _hx509_private_key_free(&(*keys)[i]);
 171             hx509_set_error_string(context, 0, ENOMEM, "out of memory");
 172             return ENOMEM;
 173         }
 174     }
 175     (*keys)[i] = NULL;
 176     return 0;
 177 }
 178
 179 static int
 180 mem_addkey(hx509_context context,
 181            hx509_certs certs,
 182            void *data,
 183            hx509_private_key key)
 184 {
 185     struct mem_data *mem = data;
 186     void *ptr;
 187     int i;
 188
 189     for (i = 0; mem->keys && mem->keys[i]; i++)
 190         ;
 191     ptr = realloc(mem->keys, (i + 2) * sizeof(*mem->keys));
 192     if (ptr == NULL) {
 193         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
 194         return ENOMEM;
 195     }
 196     mem->keys = ptr;
 197     mem->keys[i] = _hx509_private_key_ref(key);
 198     mem->keys[i + 1] = NULL;
 199     return 0;
 200 }
 201
 202
 203 static struct hx509_keyset_ops keyset_mem = {
 204     "MEMORY",
 205     0,
 206     mem_init,
 207     NULL,
 208     mem_free,
 209     mem_add,
 210     NULL,
 211     mem_iter_start,
 212     mem_iter,
 213     mem_iter_end,
 214     NULL,
 215     mem_getkeys,
 216     mem_addkey
 217 };
 218
 219 void
 220 _hx509_ks_mem_register(hx509_context context)
 221 {
 222     _hx509_ks_register(context, &keyset_mem);
 223 }