lib/hx509/collector.c

   1 /*
   2  * Copyright (c) 2004 - 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
  36 struct private_key {
  37     AlgorithmIdentifier alg;
  38     hx509_private_key private_key;
  39     heim_octet_string localKeyId;
  40 };
  41
  42 struct hx509_collector {
  43     hx509_lock lock;
  44     hx509_certs unenvelop_certs;
  45     hx509_certs certs;
  46     struct {
  47         struct private_key **data;
  48         size_t len;
  49     } val;
  50 };
  51
  52
  53 int
  54 _hx509_collector_alloc(hx509_context context, hx509_lock lock, struct hx509_collector **collector)
  55 {
  56     struct hx509_collector *c;
  57     int ret;
  58
  59     *collector = NULL;
  60
  61     c = calloc(1, sizeof(*c));
  62     if (c == NULL) {
  63         hx509_set_error_string(context, 0, ENOMEM, "out of memory");
  64         return ENOMEM;
  65     }
  66     c->lock = lock;
  67
  68     ret = hx509_certs_init(context, "MEMORY:collector-unenvelop-cert",
  69                            0,NULL, &c->unenvelop_certs);
  70     if (ret) {
  71         free(c);
  72         return ret;
  73     }
  74     c->val.data = NULL;
  75     c->val.len = 0;
  76     ret = hx509_certs_init(context, "MEMORY:collector-tmp-store",
  77                            0, NULL, &c->certs);
  78     if (ret) {
  79         hx509_certs_free(&c->unenvelop_certs);
  80         free(c);
  81         return ret;
  82     }
  83
  84     *collector = c;
  85     return 0;
  86 }
  87
  88 hx509_lock
  89 _hx509_collector_get_lock(struct hx509_collector *c)
  90 {
  91     return c->lock;
  92 }
  93
  94
  95 int
  96 _hx509_collector_certs_add(hx509_context context,
  97                            struct hx509_collector *c,
  98                            hx509_cert cert)
  99 {
 100     return hx509_certs_add(context, c->certs, cert);
 101 }
 102
 103 static void
 104 free_private_key(struct private_key *key)
 105 {
 106     free_AlgorithmIdentifier(&key->alg);
 107     if (key->private_key)
 108         hx509_private_key_free(&key->private_key);
 109     der_free_octet_string(&key->localKeyId);
 110     free(key);
 111 }
 112
 113 int
 114 _hx509_collector_private_key_add(hx509_context context,
 115                                  struct hx509_collector *c,
 116                                  const AlgorithmIdentifier *alg,
 117                                  hx509_private_key private_key,
 118                                  const heim_octet_string *key_data,
 119                                  const heim_octet_string *localKeyId)
 120 {
 121     struct private_key *key;
 122     void *d;
 123     int ret;
 124
 125     key = calloc(1, sizeof(*key));
 126     if (key == NULL)
 127         return ENOMEM;
 128
 129     d = realloc(c->val.data, (c->val.len + 1) * sizeof(c->val.data[0]));
 130     if (d == NULL) {
 131         free(key);
 132         hx509_set_error_string(context, 0, ENOMEM, "Out of memory");
 133         return ENOMEM;
 134     }
 135     c->val.data = d;
 136
 137     ret = copy_AlgorithmIdentifier(alg, &key->alg);
 138     if (ret) {
 139         hx509_set_error_string(context, 0, ret, "Failed to copy "
 140                                "AlgorithmIdentifier");
 141         goto out;
 142     }
 143     if (private_key) {
 144         key->private_key = private_key;
 145     } else {
 146         ret = hx509_parse_private_key(context, alg,
 147                                        key_data->data, key_data->length,
 148                                        HX509_KEY_FORMAT_DER,
 149                                        &key->private_key);
 150         if (ret)
 151             goto out;
 152     }
 153     if (localKeyId) {
 154         ret = der_copy_octet_string(localKeyId, &key->localKeyId);
 155         if (ret) {
 156             hx509_set_error_string(context, 0, ret,
 157                                    "Failed to copy localKeyId");
 158             goto out;
 159         }
 160     } else
 161         memset(&key->localKeyId, 0, sizeof(key->localKeyId));
 162
 163     c->val.data[c->val.len] = key;
 164     c->val.len++;
 165
 166 out:
 167     if (ret)
 168         free_private_key(key);
 169
 170     return ret;
 171 }
 172
 173 static int
 174 match_localkeyid(hx509_context context,
 175                  struct private_key *value,
 176                  hx509_certs certs)
 177 {
 178     hx509_cert cert;
 179     hx509_query q;
 180     int ret;
 181
 182     if (value->localKeyId.length == 0) {
 183         hx509_set_error_string(context, 0, HX509_LOCAL_ATTRIBUTE_MISSING,
 184                                "No local key attribute on private key");
 185         return HX509_LOCAL_ATTRIBUTE_MISSING;
 186     }
 187
 188     _hx509_query_clear(&q);
 189     q.match |= HX509_QUERY_MATCH_LOCAL_KEY_ID;
 190
 191     q.local_key_id = &value->localKeyId;
 192
 193     ret = hx509_certs_find(context, certs, &q, &cert);
 194     if (ret == 0) {
 195
 196         if (value->private_key)
 197             _hx509_cert_assign_key(cert, value->private_key);
 198         hx509_cert_free(cert);
 199     }
 200     return ret;
 201 }
 202
 203 static int
 204 match_keys(hx509_context context, struct private_key *value, hx509_certs certs)
 205 {
 206     hx509_cursor cursor;
 207     hx509_cert c;
 208     int ret, found = HX509_CERT_NOT_FOUND;
 209
 210     if (value->private_key == NULL) {
 211         hx509_set_error_string(context, 0, HX509_PRIVATE_KEY_MISSING,
 212                                "No private key to compare with");
 213         return HX509_PRIVATE_KEY_MISSING;
 214     }
 215
 216     ret = hx509_certs_start_seq(context, certs, &cursor);
 217     if (ret)
 218         return ret;
 219
 220     c = NULL;
 221     while (1) {
 222         ret = hx509_certs_next_cert(context, certs, cursor, &c);
 223         if (ret)
 224             break;
 225         if (c == NULL)
 226             break;
 227         if (_hx509_cert_private_key(c)) {
 228             hx509_cert_free(c);
 229             continue;
 230         }
 231
 232         ret = _hx509_match_keys(c, value->private_key);
 233         if (ret) {
 234             _hx509_cert_assign_key(c, value->private_key);
 235             hx509_cert_free(c);
 236             found = 0;
 237             break;
 238         }
 239         hx509_cert_free(c);
 240     }
 241
 242     hx509_certs_end_seq(context, certs, cursor);
 243
 244     if (found)
 245         hx509_clear_error_string(context);
 246
 247     return found;
 248 }
 249
 250 int
 251 _hx509_collector_collect_certs(hx509_context context,
 252                                struct hx509_collector *c,
 253                                hx509_certs *ret_certs)
 254 {
 255     hx509_certs certs;
 256     int ret;
 257     size_t i;
 258
 259     *ret_certs = NULL;
 260
 261     ret = hx509_certs_init(context, "MEMORY:collector-store", 0, NULL, &certs);
 262     if (ret)
 263         return ret;
 264
 265     ret = hx509_certs_merge(context, certs, c->certs);
 266     if (ret) {
 267         hx509_certs_free(&certs);
 268         return ret;
 269     }
 270
 271     for (i = 0; i < c->val.len; i++) {
 272         ret = match_localkeyid(context, c->val.data[i], certs);
 273         if (ret == 0)
 274             continue;
 275         ret = match_keys(context, c->val.data[i], certs);
 276         if (ret == 0)
 277             continue;
 278     }
 279
 280     *ret_certs = certs;
 281
 282     return 0;
 283 }
 284
 285 int
 286 _hx509_collector_collect_private_keys(hx509_context context,
 287                                       struct hx509_collector *c,
 288                                       hx509_private_key **keys)
 289 {
 290     size_t i, nkeys;
 291
 292     *keys = NULL;
 293
 294     for (i = 0, nkeys = 0; i < c->val.len; i++)
 295         if (c->val.data[i]->private_key)
 296             nkeys++;
 297
 298     *keys = calloc(nkeys + 1, sizeof(**keys));
 299     if (*keys == NULL) {
 300         hx509_set_error_string(context, 0, ENOMEM, "malloc - out of memory");
 301         return ENOMEM;
 302     }
 303
 304     for (i = 0, nkeys = 0; i < c->val.len; i++) {
 305         if (c->val.data[i]->private_key) {
 306             (*keys)[nkeys++] = c->val.data[i]->private_key;
 307             c->val.data[i]->private_key = NULL;
 308         }
 309     }
 310     (*keys)[nkeys] = NULL;
 311
 312     return 0;
 313 }
 314
 315
 316 void
 317 _hx509_collector_free(struct hx509_collector *c)
 318 {
 319     size_t i;
 320
 321     if (c->unenvelop_certs)
 322         hx509_certs_free(&c->unenvelop_certs);
 323     if (c->certs)
 324         hx509_certs_free(&c->certs);
 325     for (i = 0; i < c->val.len; i++)
 326         free_private_key(c->val.data[i]);
 327     if (c->val.data)
 328         free(c->val.data);
 329     free(c);
 330 }