Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/x509/by_dir.c */ |
| 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This package is an SSL implementation written |
| 6 | * by Eric Young (eay@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@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@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@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 | |
| 59 | #include <stdio.h> |
| 60 | #include <time.h> |
| 61 | #include <errno.h> |
| 62 | |
| 63 | #include "cryptlib.h" |
| 64 | |
| 65 | #ifndef NO_SYS_TYPES_H |
| 66 | # include <sys/types.h> |
| 67 | #endif |
| 68 | #ifndef OPENSSL_NO_POSIX_IO |
| 69 | # include <sys/stat.h> |
| 70 | #endif |
| 71 | |
| 72 | #include <openssl/lhash.h> |
| 73 | #include <openssl/x509.h> |
| 74 | |
| 75 | |
| 76 | typedef struct lookup_dir_hashes_st |
| 77 | { |
| 78 | unsigned long hash; |
| 79 | int suffix; |
| 80 | } BY_DIR_HASH; |
| 81 | |
| 82 | typedef struct lookup_dir_entry_st |
| 83 | { |
| 84 | char *dir; |
| 85 | int dir_type; |
| 86 | STACK_OF(BY_DIR_HASH) *hashes; |
| 87 | } BY_DIR_ENTRY; |
| 88 | |
| 89 | typedef struct lookup_dir_st |
| 90 | { |
| 91 | BUF_MEM *buffer; |
| 92 | STACK_OF(BY_DIR_ENTRY) *dirs; |
| 93 | } BY_DIR; |
| 94 | |
| 95 | DECLARE_STACK_OF(BY_DIR_HASH) |
| 96 | DECLARE_STACK_OF(BY_DIR_ENTRY) |
| 97 | |
| 98 | static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl, |
| 99 | char **ret); |
| 100 | static int new_dir(X509_LOOKUP *lu); |
| 101 | static void free_dir(X509_LOOKUP *lu); |
| 102 | static int add_cert_dir(BY_DIR *ctx,const char *dir,int type); |
| 103 | static int get_cert_by_subject(X509_LOOKUP *xl,int type,X509_NAME *name, |
| 104 | X509_OBJECT *ret); |
| 105 | X509_LOOKUP_METHOD x509_dir_lookup= |
| 106 | { |
| 107 | "Load certs from files in a directory", |
| 108 | new_dir, /* new */ |
| 109 | free_dir, /* free */ |
| 110 | NULL, /* init */ |
| 111 | NULL, /* shutdown */ |
| 112 | dir_ctrl, /* ctrl */ |
| 113 | get_cert_by_subject, /* get_by_subject */ |
| 114 | NULL, /* get_by_issuer_serial */ |
| 115 | NULL, /* get_by_fingerprint */ |
| 116 | NULL, /* get_by_alias */ |
| 117 | }; |
| 118 | |
| 119 | X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void) |
| 120 | { |
| 121 | return(&x509_dir_lookup); |
| 122 | } |
| 123 | |
| 124 | static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl, |
| 125 | char **retp) |
| 126 | { |
| 127 | int ret=0; |
| 128 | BY_DIR *ld; |
| 129 | char *dir = NULL; |
| 130 | |
| 131 | ld=(BY_DIR *)ctx->method_data; |
| 132 | |
| 133 | switch (cmd) |
| 134 | { |
| 135 | case X509_L_ADD_DIR: |
| 136 | if (argl == X509_FILETYPE_DEFAULT) |
| 137 | { |
| 138 | dir=(char *)getenv(X509_get_default_cert_dir_env()); |
| 139 | if (dir) |
| 140 | ret=add_cert_dir(ld,dir,X509_FILETYPE_PEM); |
| 141 | else |
| 142 | ret=add_cert_dir(ld,X509_get_default_cert_dir(), |
| 143 | X509_FILETYPE_PEM); |
| 144 | if (!ret) |
| 145 | { |
| 146 | X509err(X509_F_DIR_CTRL,X509_R_LOADING_CERT_DIR); |
| 147 | } |
| 148 | } |
| 149 | else |
| 150 | ret=add_cert_dir(ld,argp,(int)argl); |
| 151 | break; |
| 152 | } |
| 153 | return(ret); |
| 154 | } |
| 155 | |
| 156 | static int new_dir(X509_LOOKUP *lu) |
| 157 | { |
| 158 | BY_DIR *a; |
| 159 | |
| 160 | if ((a=(BY_DIR *)OPENSSL_malloc(sizeof(BY_DIR))) == NULL) |
| 161 | return(0); |
| 162 | if ((a->buffer=BUF_MEM_new()) == NULL) |
| 163 | { |
| 164 | OPENSSL_free(a); |
| 165 | return(0); |
| 166 | } |
| 167 | a->dirs=NULL; |
| 168 | lu->method_data=(char *)a; |
| 169 | return(1); |
| 170 | } |
| 171 | |
| 172 | static void by_dir_hash_free(BY_DIR_HASH *hash) |
| 173 | { |
| 174 | OPENSSL_free(hash); |
| 175 | } |
| 176 | |
| 177 | static int by_dir_hash_cmp(const BY_DIR_HASH * const *a, |
| 178 | const BY_DIR_HASH * const *b) |
| 179 | { |
| 180 | if ((*a)->hash > (*b)->hash) |
| 181 | return 1; |
| 182 | if ((*a)->hash < (*b)->hash) |
| 183 | return -1; |
| 184 | return 0; |
| 185 | } |
| 186 | |
| 187 | static void by_dir_entry_free(BY_DIR_ENTRY *ent) |
| 188 | { |
| 189 | if (ent->dir) |
| 190 | OPENSSL_free(ent->dir); |
| 191 | if (ent->hashes) |
| 192 | sk_BY_DIR_HASH_pop_free(ent->hashes, by_dir_hash_free); |
| 193 | OPENSSL_free(ent); |
| 194 | } |
| 195 | |
| 196 | static void free_dir(X509_LOOKUP *lu) |
| 197 | { |
| 198 | BY_DIR *a; |
| 199 | |
| 200 | a=(BY_DIR *)lu->method_data; |
| 201 | if (a->dirs != NULL) |
| 202 | sk_BY_DIR_ENTRY_pop_free(a->dirs, by_dir_entry_free); |
| 203 | if (a->buffer != NULL) |
| 204 | BUF_MEM_free(a->buffer); |
| 205 | OPENSSL_free(a); |
| 206 | } |
| 207 | |
| 208 | static int add_cert_dir(BY_DIR *ctx, const char *dir, int type) |
| 209 | { |
| 210 | int j,len; |
| 211 | const char *s,*ss,*p; |
| 212 | |
| 213 | if (dir == NULL || !*dir) |
| 214 | { |
| 215 | X509err(X509_F_ADD_CERT_DIR,X509_R_INVALID_DIRECTORY); |
| 216 | return 0; |
| 217 | } |
| 218 | |
| 219 | s=dir; |
| 220 | p=s; |
| 221 | for (;;p++) |
| 222 | { |
| 223 | if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0')) |
| 224 | { |
| 225 | BY_DIR_ENTRY *ent; |
| 226 | ss=s; |
| 227 | s=p+1; |
| 228 | len=(int)(p-ss); |
| 229 | if (len == 0) continue; |
| 230 | for (j=0; j < sk_BY_DIR_ENTRY_num(ctx->dirs); j++) |
| 231 | { |
| 232 | ent = sk_BY_DIR_ENTRY_value(ctx->dirs, j); |
| 233 | if (strlen(ent->dir) == (size_t)len && |
| 234 | strncmp(ent->dir,ss,(unsigned int)len) == 0) |
| 235 | break; |
| 236 | } |
| 237 | if (j < sk_BY_DIR_ENTRY_num(ctx->dirs)) |
| 238 | continue; |
| 239 | if (ctx->dirs == NULL) |
| 240 | { |
| 241 | ctx->dirs = sk_BY_DIR_ENTRY_new_null(); |
| 242 | if (!ctx->dirs) |
| 243 | { |
| 244 | X509err(X509_F_ADD_CERT_DIR,ERR_R_MALLOC_FAILURE); |
| 245 | return 0; |
| 246 | } |
| 247 | } |
| 248 | ent = OPENSSL_malloc(sizeof(BY_DIR_ENTRY)); |
| 249 | if (!ent) |
| 250 | return 0; |
| 251 | ent->dir_type = type; |
| 252 | ent->hashes = sk_BY_DIR_HASH_new(by_dir_hash_cmp); |
| 253 | ent->dir = OPENSSL_malloc((unsigned int)len+1); |
| 254 | if (!ent->dir || !ent->hashes) |
| 255 | { |
| 256 | by_dir_entry_free(ent); |
| 257 | return 0; |
| 258 | } |
| 259 | strncpy(ent->dir,ss,(unsigned int)len); |
| 260 | ent->dir[len] = '\0'; |
| 261 | if (!sk_BY_DIR_ENTRY_push(ctx->dirs, ent)) |
| 262 | { |
| 263 | by_dir_entry_free(ent); |
| 264 | return 0; |
| 265 | } |
| 266 | } |
| 267 | if (*p == '\0') |
| 268 | break; |
| 269 | } |
| 270 | return 1; |
| 271 | } |
| 272 | |
| 273 | static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name, |
| 274 | X509_OBJECT *ret) |
| 275 | { |
| 276 | BY_DIR *ctx; |
| 277 | union { |
| 278 | struct { |
| 279 | X509 st_x509; |
| 280 | X509_CINF st_x509_cinf; |
| 281 | } x509; |
| 282 | struct { |
| 283 | X509_CRL st_crl; |
| 284 | X509_CRL_INFO st_crl_info; |
| 285 | } crl; |
| 286 | } data; |
| 287 | int ok=0; |
| 288 | int i,j,k; |
| 289 | unsigned long h; |
| 290 | BUF_MEM *b=NULL; |
| 291 | X509_OBJECT stmp,*tmp; |
| 292 | const char *postfix=""; |
| 293 | |
| 294 | if (name == NULL) return(0); |
| 295 | |
| 296 | stmp.type=type; |
| 297 | if (type == X509_LU_X509) |
| 298 | { |
| 299 | data.x509.st_x509.cert_info= &data.x509.st_x509_cinf; |
| 300 | data.x509.st_x509_cinf.subject=name; |
| 301 | stmp.data.x509= &data.x509.st_x509; |
| 302 | postfix=""; |
| 303 | } |
| 304 | else if (type == X509_LU_CRL) |
| 305 | { |
| 306 | data.crl.st_crl.crl= &data.crl.st_crl_info; |
| 307 | data.crl.st_crl_info.issuer=name; |
| 308 | stmp.data.crl= &data.crl.st_crl; |
| 309 | postfix="r"; |
| 310 | } |
| 311 | else |
| 312 | { |
| 313 | X509err(X509_F_GET_CERT_BY_SUBJECT,X509_R_WRONG_LOOKUP_TYPE); |
| 314 | goto finish; |
| 315 | } |
| 316 | |
| 317 | if ((b=BUF_MEM_new()) == NULL) |
| 318 | { |
| 319 | X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_BUF_LIB); |
| 320 | goto finish; |
| 321 | } |
| 322 | |
| 323 | ctx=(BY_DIR *)xl->method_data; |
| 324 | |
| 325 | h=X509_NAME_hash(name); |
| 326 | for (i=0; i < sk_BY_DIR_ENTRY_num(ctx->dirs); i++) |
| 327 | { |
| 328 | BY_DIR_ENTRY *ent; |
| 329 | int idx; |
| 330 | BY_DIR_HASH htmp, *hent; |
| 331 | ent = sk_BY_DIR_ENTRY_value(ctx->dirs, i); |
| 332 | j=strlen(ent->dir)+1+8+6+1+1; |
| 333 | if (!BUF_MEM_grow(b,j)) |
| 334 | { |
| 335 | X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_MALLOC_FAILURE); |
| 336 | goto finish; |
| 337 | } |
| 338 | if (type == X509_LU_CRL && ent->hashes) |
| 339 | { |
| 340 | htmp.hash = h; |
| 341 | CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE); |
| 342 | idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp); |
| 343 | if (idx >= 0) |
| 344 | { |
| 345 | hent = sk_BY_DIR_HASH_value(ent->hashes, idx); |
| 346 | k = hent->suffix; |
| 347 | } |
| 348 | else |
| 349 | { |
| 350 | hent = NULL; |
| 351 | k=0; |
| 352 | } |
| 353 | CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE); |
| 354 | } |
| 355 | else |
| 356 | { |
| 357 | k = 0; |
| 358 | hent = NULL; |
| 359 | } |
| 360 | for (;;) |
| 361 | { |
| 362 | char c = '/'; |
| 363 | #ifdef OPENSSL_SYS_VMS |
| 364 | c = ent->dir[strlen(ent->dir)-1]; |
| 365 | if (c != ':' && c != '>' && c != ']') |
| 366 | { |
| 367 | /* If no separator is present, we assume the |
| 368 | directory specifier is a logical name, and |
| 369 | add a colon. We really should use better |
| 370 | VMS routines for merging things like this, |
| 371 | but this will do for now... |
| 372 | -- Richard Levitte */ |
| 373 | c = ':'; |
| 374 | } |
| 375 | else |
| 376 | { |
| 377 | c = '\0'; |
| 378 | } |
| 379 | #endif |
| 380 | if (c == '\0') |
| 381 | { |
| 382 | /* This is special. When c == '\0', no |
| 383 | directory separator should be added. */ |
| 384 | BIO_snprintf(b->data,b->max, |
| 385 | "%s%08lx.%s%d",ent->dir,h, |
| 386 | postfix,k); |
| 387 | } |
| 388 | else |
| 389 | { |
| 390 | BIO_snprintf(b->data,b->max, |
| 391 | "%s%c%08lx.%s%d",ent->dir,c,h, |
| 392 | postfix,k); |
| 393 | } |
| 394 | #ifndef OPENSSL_NO_POSIX_IO |
| 395 | #ifdef _WIN32 |
| 396 | #define stat _stat |
| 397 | #endif |
| 398 | { |
| 399 | struct stat st; |
| 400 | if (stat(b->data,&st) < 0) |
| 401 | break; |
| 402 | } |
| 403 | #endif |
| 404 | /* found one. */ |
| 405 | if (type == X509_LU_X509) |
| 406 | { |
| 407 | if ((X509_load_cert_file(xl,b->data, |
| 408 | ent->dir_type)) == 0) |
| 409 | break; |
| 410 | } |
| 411 | else if (type == X509_LU_CRL) |
| 412 | { |
| 413 | if ((X509_load_crl_file(xl,b->data, |
| 414 | ent->dir_type)) == 0) |
| 415 | break; |
| 416 | } |
| 417 | /* else case will caught higher up */ |
| 418 | k++; |
| 419 | } |
| 420 | |
| 421 | /* we have added it to the cache so now pull |
| 422 | * it out again */ |
| 423 | CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); |
| 424 | j = sk_X509_OBJECT_find(xl->store_ctx->objs,&stmp); |
| 425 | if(j != -1) tmp=sk_X509_OBJECT_value(xl->store_ctx->objs,j); |
| 426 | else tmp = NULL; |
| 427 | CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); |
| 428 | |
| 429 | |
| 430 | /* If a CRL, update the last file suffix added for this */ |
| 431 | |
| 432 | if (type == X509_LU_CRL) |
| 433 | { |
| 434 | CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); |
| 435 | /* Look for entry again in case another thread added |
| 436 | * an entry first. |
| 437 | */ |
| 438 | if (!hent) |
| 439 | { |
| 440 | htmp.hash = h; |
| 441 | idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp); |
| 442 | if (idx >= 0) |
| 443 | hent = |
| 444 | sk_BY_DIR_HASH_value(ent->hashes, idx); |
| 445 | } |
| 446 | if (!hent) |
| 447 | { |
| 448 | hent = OPENSSL_malloc(sizeof(BY_DIR_HASH)); |
| 449 | hent->hash = h; |
| 450 | hent->suffix = k; |
| 451 | if (!sk_BY_DIR_HASH_push(ent->hashes, hent)) |
| 452 | { |
| 453 | CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); |
| 454 | OPENSSL_free(hent); |
| 455 | ok = 0; |
| 456 | goto finish; |
| 457 | } |
| 458 | } |
| 459 | else if (hent->suffix < k) |
| 460 | hent->suffix = k; |
| 461 | |
| 462 | CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); |
| 463 | |
| 464 | } |
| 465 | |
| 466 | if (tmp != NULL) |
| 467 | { |
| 468 | ok=1; |
| 469 | ret->type=tmp->type; |
| 470 | memcpy(&ret->data,&tmp->data,sizeof(ret->data)); |
| 471 | /* If we were going to up the reference count, |
| 472 | * we would need to do it on a perl 'type' |
| 473 | * basis */ |
| 474 | /* CRYPTO_add(&tmp->data.x509->references,1, |
| 475 | CRYPTO_LOCK_X509);*/ |
| 476 | goto finish; |
| 477 | } |
| 478 | } |
| 479 | finish: |
| 480 | if (b != NULL) BUF_MEM_free(b); |
| 481 | return(ok); |
| 482 | } |