1 /* crypto/x509/by_dir.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay (at) cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] */ 57 58 #include <string.h> 59 #include <sys/stat.h> 60 #include <sys/types.h> 61 62 #include <openssl/buf.h> 63 #include <openssl/err.h> 64 #include <openssl/mem.h> 65 #include <openssl/thread.h> 66 #include <openssl/x509.h> 67 68 #include "../internal.h" 69 70 typedef struct lookup_dir_hashes_st { 71 unsigned long hash; 72 int suffix; 73 } BY_DIR_HASH; 74 75 typedef struct lookup_dir_entry_st { 76 char *dir; 77 int dir_type; 78 STACK_OF(BY_DIR_HASH) *hashes; 79 } BY_DIR_ENTRY; 80 81 typedef struct lookup_dir_st { 82 BUF_MEM *buffer; 83 STACK_OF(BY_DIR_ENTRY) *dirs; 84 } BY_DIR; 85 86 DEFINE_STACK_OF(BY_DIR_HASH) 87 DEFINE_STACK_OF(BY_DIR_ENTRY) 88 89 static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl, 90 char **ret); 91 static int new_dir(X509_LOOKUP *lu); 92 static void free_dir(X509_LOOKUP *lu); 93 static int add_cert_dir(BY_DIR *ctx, const char *dir, int type); 94 static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name, 95 X509_OBJECT *ret); 96 static X509_LOOKUP_METHOD x509_dir_lookup = { 97 "Load certs from files in a directory", 98 new_dir, /* new */ 99 free_dir, /* free */ 100 NULL, /* init */ 101 NULL, /* shutdown */ 102 dir_ctrl, /* ctrl */ 103 get_cert_by_subject, /* get_by_subject */ 104 NULL, /* get_by_issuer_serial */ 105 NULL, /* get_by_fingerprint */ 106 NULL, /* get_by_alias */ 107 }; 108 109 X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void) 110 { 111 return (&x509_dir_lookup); 112 } 113 114 static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl, 115 char **retp) 116 { 117 int ret = 0; 118 BY_DIR *ld; 119 char *dir = NULL; 120 121 ld = (BY_DIR *)ctx->method_data; 122 123 switch (cmd) { 124 case X509_L_ADD_DIR: 125 if (argl == X509_FILETYPE_DEFAULT) { 126 dir = (char *)getenv(X509_get_default_cert_dir_env()); 127 if (dir) 128 ret = add_cert_dir(ld, dir, X509_FILETYPE_PEM); 129 else 130 ret = add_cert_dir(ld, X509_get_default_cert_dir(), 131 X509_FILETYPE_PEM); 132 if (!ret) { 133 OPENSSL_PUT_ERROR(X509, X509_R_LOADING_CERT_DIR); 134 } 135 } else 136 ret = add_cert_dir(ld, argp, (int)argl); 137 break; 138 } 139 return (ret); 140 } 141 142 static int new_dir(X509_LOOKUP *lu) 143 { 144 BY_DIR *a; 145 146 if ((a = (BY_DIR *)OPENSSL_malloc(sizeof(BY_DIR))) == NULL) 147 return (0); 148 if ((a->buffer = BUF_MEM_new()) == NULL) { 149 OPENSSL_free(a); 150 return (0); 151 } 152 a->dirs = NULL; 153 lu->method_data = (char *)a; 154 return (1); 155 } 156 157 static void by_dir_hash_free(BY_DIR_HASH *hash) 158 { 159 OPENSSL_free(hash); 160 } 161 162 static int by_dir_hash_cmp(const BY_DIR_HASH **a, const BY_DIR_HASH **b) 163 { 164 if ((*a)->hash > (*b)->hash) 165 return 1; 166 if ((*a)->hash < (*b)->hash) 167 return -1; 168 return 0; 169 } 170 171 static void by_dir_entry_free(BY_DIR_ENTRY *ent) 172 { 173 if (ent->dir) 174 OPENSSL_free(ent->dir); 175 if (ent->hashes) 176 sk_BY_DIR_HASH_pop_free(ent->hashes, by_dir_hash_free); 177 OPENSSL_free(ent); 178 } 179 180 static void free_dir(X509_LOOKUP *lu) 181 { 182 BY_DIR *a; 183 184 a = (BY_DIR *)lu->method_data; 185 if (a->dirs != NULL) 186 sk_BY_DIR_ENTRY_pop_free(a->dirs, by_dir_entry_free); 187 if (a->buffer != NULL) 188 BUF_MEM_free(a->buffer); 189 OPENSSL_free(a); 190 } 191 192 static int add_cert_dir(BY_DIR *ctx, const char *dir, int type) 193 { 194 size_t j, len; 195 const char *s, *ss, *p; 196 197 if (dir == NULL || !*dir) { 198 OPENSSL_PUT_ERROR(X509, X509_R_INVALID_DIRECTORY); 199 return 0; 200 } 201 202 s = dir; 203 p = s; 204 do { 205 if ((*p == ':') || (*p == '\0')) { 206 BY_DIR_ENTRY *ent; 207 ss = s; 208 s = p + 1; 209 len = p - ss; 210 if (len == 0) 211 continue; 212 for (j = 0; j < sk_BY_DIR_ENTRY_num(ctx->dirs); j++) { 213 ent = sk_BY_DIR_ENTRY_value(ctx->dirs, j); 214 if (strlen(ent->dir) == len && 215 strncmp(ent->dir, ss, len) == 0) 216 break; 217 } 218 if (j < sk_BY_DIR_ENTRY_num(ctx->dirs)) 219 continue; 220 if (ctx->dirs == NULL) { 221 ctx->dirs = sk_BY_DIR_ENTRY_new_null(); 222 if (!ctx->dirs) { 223 OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE); 224 return 0; 225 } 226 } 227 ent = OPENSSL_malloc(sizeof(BY_DIR_ENTRY)); 228 if (!ent) 229 return 0; 230 ent->dir_type = type; 231 ent->hashes = sk_BY_DIR_HASH_new(by_dir_hash_cmp); 232 ent->dir = OPENSSL_malloc(len + 1); 233 if (!ent->dir || !ent->hashes) { 234 by_dir_entry_free(ent); 235 return 0; 236 } 237 BUF_strlcpy(ent->dir, ss, len + 1); 238 if (!sk_BY_DIR_ENTRY_push(ctx->dirs, ent)) { 239 by_dir_entry_free(ent); 240 return 0; 241 } 242 } 243 } while (*p++ != '\0'); 244 return 1; 245 } 246 247 /* 248 * g_ent_hashes_lock protects the |hashes| member of all |BY_DIR_ENTRY| 249 * objects. 250 */ 251 static struct CRYPTO_STATIC_MUTEX g_ent_hashes_lock = 252 CRYPTO_STATIC_MUTEX_INIT; 253 254 static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name, 255 X509_OBJECT *ret) 256 { 257 BY_DIR *ctx; 258 union { 259 struct { 260 X509 st_x509; 261 X509_CINF st_x509_cinf; 262 } x509; 263 struct { 264 X509_CRL st_crl; 265 X509_CRL_INFO st_crl_info; 266 } crl; 267 } data; 268 int ok = 0; 269 size_t i; 270 int j, k; 271 unsigned long h; 272 unsigned long hash_array[2]; 273 int hash_index; 274 BUF_MEM *b = NULL; 275 X509_OBJECT stmp, *tmp; 276 const char *postfix = ""; 277 278 if (name == NULL) 279 return (0); 280 281 stmp.type = type; 282 if (type == X509_LU_X509) { 283 data.x509.st_x509.cert_info = &data.x509.st_x509_cinf; 284 data.x509.st_x509_cinf.subject = name; 285 stmp.data.x509 = &data.x509.st_x509; 286 postfix = ""; 287 } else if (type == X509_LU_CRL) { 288 data.crl.st_crl.crl = &data.crl.st_crl_info; 289 data.crl.st_crl_info.issuer = name; 290 stmp.data.crl = &data.crl.st_crl; 291 postfix = "r"; 292 } else { 293 OPENSSL_PUT_ERROR(X509, X509_R_WRONG_LOOKUP_TYPE); 294 goto finish; 295 } 296 297 if ((b = BUF_MEM_new()) == NULL) { 298 OPENSSL_PUT_ERROR(X509, ERR_R_BUF_LIB); 299 goto finish; 300 } 301 302 ctx = (BY_DIR *)xl->method_data; 303 304 hash_array[0] = X509_NAME_hash(name); 305 hash_array[1] = X509_NAME_hash_old(name); 306 for (hash_index = 0; hash_index < 2; ++hash_index) { 307 h = hash_array[hash_index]; 308 for (i = 0; i < sk_BY_DIR_ENTRY_num(ctx->dirs); i++) { 309 BY_DIR_ENTRY *ent; 310 size_t idx; 311 BY_DIR_HASH htmp, *hent; 312 ent = sk_BY_DIR_ENTRY_value(ctx->dirs, i); 313 j = strlen(ent->dir) + 1 + 8 + 6 + 1 + 1; 314 if (!BUF_MEM_grow(b, j)) { 315 OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE); 316 goto finish; 317 } 318 if (type == X509_LU_CRL && ent->hashes) { 319 htmp.hash = h; 320 CRYPTO_STATIC_MUTEX_lock_read(&g_ent_hashes_lock); 321 if (sk_BY_DIR_HASH_find(ent->hashes, &idx, &htmp)) { 322 hent = sk_BY_DIR_HASH_value(ent->hashes, idx); 323 k = hent->suffix; 324 } else { 325 hent = NULL; 326 k = 0; 327 } 328 CRYPTO_STATIC_MUTEX_unlock_read(&g_ent_hashes_lock); 329 } else { 330 k = 0; 331 hent = NULL; 332 } 333 for (;;) { 334 char c = '/'; 335 #ifdef OPENSSL_SYS_VMS 336 c = ent->dir[strlen(ent->dir) - 1]; 337 if (c != ':' && c != '>' && c != ']') { 338 /* 339 * If no separator is present, we assume the directory 340 * specifier is a logical name, and add a colon. We 341 * really should use better VMS routines for merging 342 * things like this, but this will do for now... -- 343 * Richard Levitte 344 */ 345 c = ':'; 346 } else { 347 c = '\0'; 348 } 349 #endif 350 if (c == '\0') { 351 /* 352 * This is special. When c == '\0', no directory 353 * separator should be added. 354 */ 355 BIO_snprintf(b->data, b->max, 356 "%s%08lx.%s%d", ent->dir, h, postfix, k); 357 } else { 358 BIO_snprintf(b->data, b->max, 359 "%s%c%08lx.%s%d", ent->dir, c, h, 360 postfix, k); 361 } 362 #ifndef OPENSSL_NO_POSIX_IO 363 # if defined(_WIN32) && !defined(stat) 364 # define stat _stat 365 # endif 366 { 367 struct stat st; 368 if (stat(b->data, &st) < 0) 369 break; 370 } 371 #endif 372 /* found one. */ 373 if (type == X509_LU_X509) { 374 if ((X509_load_cert_file(xl, b->data, 375 ent->dir_type)) == 0) 376 break; 377 } else if (type == X509_LU_CRL) { 378 if ((X509_load_crl_file(xl, b->data, ent->dir_type)) == 0) 379 break; 380 } 381 /* else case will caught higher up */ 382 k++; 383 } 384 385 /* 386 * we have added it to the cache so now pull it out again 387 */ 388 CRYPTO_MUTEX_lock_write(&xl->store_ctx->objs_lock); 389 tmp = NULL; 390 if (sk_X509_OBJECT_find(xl->store_ctx->objs, &idx, &stmp)) { 391 tmp = sk_X509_OBJECT_value(xl->store_ctx->objs, idx); 392 } 393 CRYPTO_MUTEX_unlock_write(&xl->store_ctx->objs_lock); 394 395 /* 396 * If a CRL, update the last file suffix added for this 397 */ 398 399 if (type == X509_LU_CRL) { 400 CRYPTO_STATIC_MUTEX_lock_write(&g_ent_hashes_lock); 401 /* 402 * Look for entry again in case another thread added an entry 403 * first. 404 */ 405 if (!hent) { 406 htmp.hash = h; 407 if (sk_BY_DIR_HASH_find(ent->hashes, &idx, &htmp)) 408 hent = sk_BY_DIR_HASH_value(ent->hashes, idx); 409 } 410 if (!hent) { 411 hent = OPENSSL_malloc(sizeof(BY_DIR_HASH)); 412 if (hent == NULL) { 413 CRYPTO_STATIC_MUTEX_unlock_write(&g_ent_hashes_lock); 414 ok = 0; 415 goto finish; 416 } 417 hent->hash = h; 418 hent->suffix = k; 419 if (!sk_BY_DIR_HASH_push(ent->hashes, hent)) { 420 CRYPTO_STATIC_MUTEX_unlock_write(&g_ent_hashes_lock); 421 OPENSSL_free(hent); 422 ok = 0; 423 goto finish; 424 } 425 } else if (hent->suffix < k) 426 hent->suffix = k; 427 428 CRYPTO_STATIC_MUTEX_unlock_write(&g_ent_hashes_lock); 429 } 430 431 if (tmp != NULL) { 432 ok = 1; 433 ret->type = tmp->type; 434 OPENSSL_memcpy(&ret->data, &tmp->data, sizeof(ret->data)); 435 /* 436 * If we were going to up the reference count, we would need 437 * to do it on a perl 'type' basis 438 */ 439 /* 440 * CRYPTO_add(&tmp->data.x509->references,1, 441 * CRYPTO_LOCK_X509); 442 */ 443 goto finish; 444 } 445 } 446 } 447 finish: 448 if (b != NULL) 449 BUF_MEM_free(b); 450 return (ok); 451 } 452
