lib/hx509/peer.c

   1 /*
   2  * Copyright (c) 2006 - 2007 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Portions Copyright (c) 2009 Apple Inc. 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_peer Hx509 crypto selecting functions
  40  *
  41  * Peer info structures are used togeter with hx509_crypto_select() to
  42  * select the best avaible crypto algorithm to use.
  43  *
  44  * See the library functions here: @ref hx509_peer
  45  */
  46
  47 /**
  48  * Allocate a new peer info structure an init it to default values.
  49  *
  50  * @param context A hx509 context.
  51  * @param peer return an allocated peer, free with hx509_peer_info_free().
  52  *
  53  * @return An hx509 error code, see hx509_get_error_string().
  54  *
  55  * @ingroup hx509_peer
  56  */
  57
  58 int
  59 hx509_peer_info_alloc(hx509_context context, hx509_peer_info *peer)
  60 {
  61     *peer = calloc(1, sizeof(**peer));
  62     if (*peer == NULL) {
  63         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
  64         return ENOMEM;
  65     }
  66     return 0;
  67 }
  68
  69
  70 static void
  71 free_cms_alg(hx509_peer_info peer)
  72 {
  73     if (peer->val) {
  74         size_t i;
  75         for (i = 0; i < peer->len; i++)
  76             free_AlgorithmIdentifier(&peer->val[i]);
  77         free(peer->val);
  78         peer->val = NULL;
  79         peer->len = 0;
  80     }
  81 }
  82
  83 /**
  84  * Free a peer info structure.
  85  *
  86  * @param peer peer info to be freed.
  87  *
  88  * @ingroup hx509_peer
  89  */
  90
  91 void
  92 hx509_peer_info_free(hx509_peer_info peer)
  93 {
  94     if (peer == NULL)
  95         return;
  96     if (peer->cert)
  97         hx509_cert_free(peer->cert);
  98     free_cms_alg(peer);
  99     memset(peer, 0, sizeof(*peer));
 100     free(peer);
 101 }
 102
 103 /**
 104  * Set the certificate that remote peer is using.
 105  *
 106  * @param peer peer info to update
 107  * @param cert cerificate of the remote peer.
 108  *
 109  * @return An hx509 error code, see hx509_get_error_string().
 110  *
 111  * @ingroup hx509_peer
 112  */
 113
 114 int
 115 hx509_peer_info_set_cert(hx509_peer_info peer,
 116                          hx509_cert cert)
 117 {
 118     if (peer->cert)
 119         hx509_cert_free(peer->cert);
 120     peer->cert = hx509_cert_ref(cert);
 121     return 0;
 122 }
 123
 124 /**
 125  * Add an additional algorithm that the peer supports.
 126  *
 127  * @param context A hx509 context.
 128  * @param peer the peer to set the new algorithms for
 129  * @param val an AlgorithmsIdentier to add
 130  *
 131  * @return An hx509 error code, see hx509_get_error_string().
 132  *
 133  * @ingroup hx509_peer
 134  */
 135
 136 int
 137 hx509_peer_info_add_cms_alg(hx509_context context,
 138                             hx509_peer_info peer,
 139                             const AlgorithmIdentifier *val)
 140 {
 141     void *ptr;
 142     int ret;
 143
 144     ptr = realloc(peer->val, sizeof(peer->val[0]) * (peer->len + 1));
 145     if (ptr == NULL) {
 146         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
 147         return ENOMEM;
 148     }
 149     peer->val = ptr;
 150     ret = copy_AlgorithmIdentifier(val, &peer->val[peer->len]);
 151     if (ret == 0)
 152         peer->len += 1;
 153     else
 154         hx509_set_error_string(context, 0, ret, "out of memory");
 155     return ret;
 156 }
 157
 158 /**
 159  * Set the algorithms that the peer supports.
 160  *
 161  * @param context A hx509 context.
 162  * @param peer the peer to set the new algorithms for
 163  * @param val array of supported AlgorithmsIdentiers
 164  * @param len length of array val.
 165  *
 166  * @return An hx509 error code, see hx509_get_error_string().
 167  *
 168  * @ingroup hx509_peer
 169  */
 170
 171 int
 172 hx509_peer_info_set_cms_algs(hx509_context context,
 173                              hx509_peer_info peer,
 174                              const AlgorithmIdentifier *val,
 175                              size_t len)
 176 {
 177     size_t i;
 178
 179     free_cms_alg(peer);
 180
 181     peer->val = calloc(len, sizeof(*peer->val));
 182     if (peer->val == NULL) {
 183         peer->len = 0;
 184         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
 185         return ENOMEM;
 186     }
 187     peer->len = len;
 188     for (i = 0; i < len; i++) {
 189         int ret;
 190         ret = copy_AlgorithmIdentifier(&val[i], &peer->val[i]);
 191         if (ret) {
 192             hx509_clear_error_string(context);
 193             free_cms_alg(peer);
 194             return ret;
 195         }
 196     }
 197     return 0;
 198 }
 199
 200 #if 0
 201
 202 /*
 203  * S/MIME
 204  */
 205
 206 int
 207 hx509_peer_info_parse_smime(hx509_peer_info peer,
 208                             const heim_octet_string *data)
 209 {
 210     return 0;
 211 }
 212
 213 int
 214 hx509_peer_info_unparse_smime(hx509_peer_info peer,
 215                               heim_octet_string *data)
 216 {
 217     return 0;
 218 }
 219
 220 /*
 221  * For storing hx509_peer_info to be able to cache them.
 222  */
 223
 224 int
 225 hx509_peer_info_parse(hx509_peer_info peer,
 226                       const heim_octet_string *data)
 227 {
 228     return 0;
 229 }
 230
 231 int
 232 hx509_peer_info_unparse(hx509_peer_info peer,
 233                         heim_octet_string *data)
 234 {
 235     return 0;
 236 }
 237 #endif