crypto/external/bsd/heimdal/dist/lib/hx509/ks_dir.c

   1 /*      $NetBSD: ks_dir.c,v 1.1.1.2 2014/04/24 12:45:42 pettai Exp $    */
   2
   3 /*
   4  * Copyright (c) 2006 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * 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 #include <dirent.h>
  38
  39 /*
  40  * The DIR keyset module is strange compared to the other modules
  41  * since it does lazy evaluation and really doesn't keep any local
  42  * state except for the directory iteration and cert iteration of
  43  * files. DIR ignores most errors so that the consumer doesn't get
  44  * failes for stray files in directories.
  45  */
  46
  47 struct dircursor {
  48     DIR *dir;
  49     hx509_certs certs;
  50     void *iter;
  51 };
  52
  53 /*
  54  *
  55  */
  56
  57 static int
  58 dir_init(hx509_context context,
  59          hx509_certs certs, void **data, int flags,
  60          const char *residue, hx509_lock lock)
  61 {
  62     *data = NULL;
  63
  64     {
  65         struct stat sb;
  66         int ret;
  67
  68         ret = stat(residue, &sb);
  69         if (ret == -1) {
  70             hx509_set_error_string(context, 0, ENOENT,
  71                                    "No such file %s", residue);
  72             return ENOENT;
  73         }
  74
  75         if (!S_ISDIR(sb.st_mode)) {
  76             hx509_set_error_string(context, 0, ENOTDIR,
  77                                    "%s is not a directory", residue);
  78             return ENOTDIR;
  79         }
  80     }
  81
  82     *data = strdup(residue);
  83     if (*data == NULL) {
  84         hx509_clear_error_string(context);
  85         return ENOMEM;
  86     }
  87
  88     return 0;
  89 }
  90
  91 static int
  92 dir_free(hx509_certs certs, void *data)
  93 {
  94     free(data);
  95     return 0;
  96 }
  97
  98 static int
  99 dir_iter_start(hx509_context context,
 100                hx509_certs certs, void *data, void **cursor)
 101 {
 102     struct dircursor *d;
 103
 104     *cursor = NULL;
 105
 106     d = calloc(1, sizeof(*d));
 107     if (d == NULL) {
 108         hx509_clear_error_string(context);
 109         return ENOMEM;
 110     }
 111
 112     d->dir = opendir(data);
 113     if (d->dir == NULL) {
 114         hx509_clear_error_string(context);
 115         free(d);
 116         return errno;
 117     }
 118     rk_cloexec_dir(d->dir);
 119     d->certs = NULL;
 120     d->iter = NULL;
 121
 122     *cursor = d;
 123     return 0;
 124 }
 125
 126 static int
 127 dir_iter(hx509_context context,
 128          hx509_certs certs, void *data, void *iter, hx509_cert *cert)
 129 {
 130     struct dircursor *d = iter;
 131     int ret = 0;
 132
 133     *cert = NULL;
 134
 135     do {
 136         struct dirent *dir;
 137         char *fn;
 138
 139         if (d->certs) {
 140             ret = hx509_certs_next_cert(context, d->certs, d->iter, cert);
 141             if (ret) {
 142                 hx509_certs_end_seq(context, d->certs, d->iter);
 143                 d->iter = NULL;
 144                 hx509_certs_free(&d->certs);
 145                 return ret;
 146             }
 147             if (*cert) {
 148                 ret = 0;
 149                 break;
 150             }
 151             hx509_certs_end_seq(context, d->certs, d->iter);
 152             d->iter = NULL;
 153             hx509_certs_free(&d->certs);
 154         }
 155
 156         dir = readdir(d->dir);
 157         if (dir == NULL) {
 158             ret = 0;
 159             break;
 160         }
 161         if (strcmp(dir->d_name, ".") == 0 || strcmp(dir->d_name, "..") == 0)
 162             continue;
 163
 164         if (asprintf(&fn, "FILE:%s/%s", (char *)data, dir->d_name) == -1)
 165             return ENOMEM;
 166
 167         ret = hx509_certs_init(context, fn, 0, NULL, &d->certs);
 168         if (ret == 0) {
 169
 170             ret = hx509_certs_start_seq(context, d->certs, &d->iter);
 171             if (ret)
 172             hx509_certs_free(&d->certs);
 173         }
 174         /* ignore errors */
 175         if (ret) {
 176             d->certs = NULL;
 177             ret = 0;
 178         }
 179
 180         free(fn);
 181     } while(ret == 0);
 182
 183     return ret;
 184 }
 185
 186
 187 static int
 188 dir_iter_end(hx509_context context,
 189              hx509_certs certs,
 190              void *data,
 191              void *cursor)
 192 {
 193     struct dircursor *d = cursor;
 194
 195     if (d->certs) {
 196         hx509_certs_end_seq(context, d->certs, d->iter);
 197         d->iter = NULL;
 198         hx509_certs_free(&d->certs);
 199     }
 200     closedir(d->dir);
 201     free(d);
 202     return 0;
 203 }
 204
 205
 206 static struct hx509_keyset_ops keyset_dir = {
 207     "DIR",
 208     0,
 209     dir_init,
 210     NULL,
 211     dir_free,
 212     NULL,
 213     NULL,
 214     dir_iter_start,
 215     dir_iter,
 216     dir_iter_end
 217 };
 218
 219 void
 220 _hx509_ks_dir_register(hx509_context context)
 221 {
 222     _hx509_ks_register(context, &keyset_dir);
 223 }