crypto/dist/heimdal/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  * 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: peer.c 22345 2007-12-26 19:03:51Z lha $"
  36         "$NetBSD$");
  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  * Set the algorithms 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 array of supported AlgorithmsIdentiers
 130  * @param len length of array val.
 131  *
 132  * @return An hx509 error code, see hx509_get_error_string().
 133  *
 134  * @ingroup hx509_peer
 135  */
 136
 137 int
 138 hx509_peer_info_set_cms_algs(hx509_context context,
 139                              hx509_peer_info peer,
 140                              const AlgorithmIdentifier *val,
 141                              size_t len)
 142 {
 143     size_t i;
 144
 145     free_cms_alg(peer);
 146
 147     peer->val = calloc(len, sizeof(*peer->val));
 148     if (peer->val == NULL) {
 149         peer->len = 0;
 150         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
 151         return ENOMEM;
 152     }
 153     peer->len = len;
 154     for (i = 0; i < len; i++) {
 155         int ret;
 156         ret = copy_AlgorithmIdentifier(&val[i], &peer->val[i]);
 157         if (ret) {
 158             hx509_clear_error_string(context);
 159             free_cms_alg(peer);
 160             return ret;
 161         }
 162     }
 163     return 0;
 164 }
 165
 166 #if 0
 167
 168 /*
 169  * S/MIME
 170  */
 171
 172 int
 173 hx509_peer_info_parse_smime(hx509_peer_info peer,
 174                             const heim_octet_string *data)
 175 {
 176     return 0;
 177 }
 178
 179 int
 180 hx509_peer_info_unparse_smime(hx509_peer_info peer,
 181                               heim_octet_string *data)
 182 {
 183     return 0;
 184 }
 185
 186 /*
 187  * For storing hx509_peer_info to be able to cache them.
 188  */
 189
 190 int
 191 hx509_peer_info_parse(hx509_peer_info peer,
 192                       const heim_octet_string *data)
 193 {
 194     return 0;
 195 }
 196
 197 int
 198 hx509_peer_info_unparse(hx509_peer_info peer,
 199                         heim_octet_string *data)
 200 {
 201     return 0;
 202 }
 203 #endif