1 /* 2 * Copyright (c) 2006 Kungliga Tekniska H�gskolan 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("$Id: ks_dir.c 19778 2007-01-09 10:52:13Z lha $"); 36 #include <dirent.h> 37 38 /* 39 * The DIR keyset module is strange compared to the other modules 40 * since it does lazy evaluation and really doesn't keep any local 41 * state except for the directory iteration and cert iteration of 42 * files. DIR ignores most errors so that the consumer doesn't get 43 * failes for stray files in directories. 44 */ 45 46 struct dircursor { 47 DIR *dir; 48 hx509_certs certs; 49 void *iter; 50 }; 51 52 /* 53 * 54 */ 55 56 static int 57 dir_init(hx509_context context, 58 hx509_certs certs, void **data, int flags, 59 const char *residue, hx509_lock lock) 60 { 61 *data = NULL; 62 63 { 64 struct stat sb; 65 int ret; 66 67 ret = stat(residue, &sb); 68 if (ret == -1) { 69 hx509_set_error_string(context, 0, ENOENT, 70 "No such file %s", residue); 71 return ENOENT; 72 } 73 74 if ((sb.st_mode & S_IFDIR) == 0) { 75 hx509_set_error_string(context, 0, ENOTDIR, 76 "%s is not a directory", residue); 77 return ENOTDIR; 78 } 79 } 80 81 *data = strdup(residue); 82 if (*data == NULL) { 83 hx509_clear_error_string(context); 84 return ENOMEM; 85 } 86 87 return 0; 88 } 89 90 static int 91 dir_free(hx509_certs certs, void *data) 92 { 93 free(data); 94 return 0; 95 } 96 97 98 99 static int 100 dir_iter_start(hx509_context context, 101 hx509_certs certs, void *data, void **cursor) 102 { 103 struct dircursor *d; 104 105 *cursor = NULL; 106 107 d = calloc(1, sizeof(*d)); 108 if (d == NULL) { 109 hx509_clear_error_string(context); 110 return ENOMEM; 111 } 112 113 d->dir = opendir(data); 114 if (d->dir == NULL) { 115 hx509_clear_error_string(context); 116 free(d); 117 return errno; 118 } 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 } 224