1 /* $OpenBSD: conf_def.c,v 1.28 2014/07/11 15:38:03 miod Exp $ */ 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 /* Part of the code in here was originally in conf.c, which is now removed */ 60 61 #include <stdio.h> 62 #include <string.h> 63 64 #include <openssl/buffer.h> 65 #include <openssl/conf.h> 66 #include <openssl/conf_api.h> 67 #include <openssl/err.h> 68 #include <openssl/lhash.h> 69 #include <openssl/stack.h> 70 71 #include "conf_def.h" 72 73 static char *eat_ws(CONF *conf, char *p); 74 static char *eat_alpha_numeric(CONF *conf, char *p); 75 static void clear_comments(CONF *conf, char *p); 76 static int str_copy(CONF *conf, char *section, char **to, char *from); 77 static char *scan_quote(CONF *conf, char *p); 78 static char *scan_dquote(CONF *conf, char *p); 79 #define scan_esc(conf,p) (((IS_EOF((conf),(p)[1]))?((p)+1):((p)+2))) 80 81 static CONF *def_create(CONF_METHOD *meth); 82 static int def_init_default(CONF *conf); 83 static int def_init_WIN32(CONF *conf); 84 static int def_destroy(CONF *conf); 85 static int def_destroy_data(CONF *conf); 86 static int def_load(CONF *conf, const char *name, long *eline); 87 static int def_load_bio(CONF *conf, BIO *bp, long *eline); 88 static int def_dump(const CONF *conf, BIO *bp); 89 static int def_is_number(const CONF *conf, char c); 90 static int def_to_int(const CONF *conf, char c); 91 92 static CONF_METHOD default_method = { 93 .name = "OpenSSL default", 94 .create = def_create, 95 .init = def_init_default, 96 .destroy = def_destroy, 97 .destroy_data = def_destroy_data, 98 .load_bio = def_load_bio, 99 .dump = def_dump, 100 .is_number = def_is_number, 101 .to_int = def_to_int, 102 .load = def_load 103 }; 104 105 static CONF_METHOD WIN32_method = { 106 "WIN32", 107 def_create, 108 def_init_WIN32, 109 def_destroy, 110 def_destroy_data, 111 def_load_bio, 112 def_dump, 113 def_is_number, 114 def_to_int, 115 def_load 116 }; 117 118 CONF_METHOD * 119 NCONF_default(void) 120 { 121 return &default_method; 122 } 123 124 CONF_METHOD * 125 NCONF_WIN32(void) 126 { 127 return &WIN32_method; 128 } 129 130 static CONF * 131 def_create(CONF_METHOD *meth) 132 { 133 CONF *ret; 134 135 ret = malloc(sizeof(CONF) + sizeof(unsigned short *)); 136 if (ret) 137 if (meth->init(ret) == 0) { 138 free(ret); 139 ret = NULL; 140 } 141 return ret; 142 } 143 144 static int 145 def_init_default(CONF *conf) 146 { 147 if (conf == NULL) 148 return 0; 149 150 conf->meth = &default_method; 151 conf->meth_data = CONF_type_default; 152 conf->data = NULL; 153 154 return 1; 155 } 156 157 static int 158 def_init_WIN32(CONF *conf) 159 { 160 if (conf == NULL) 161 return 0; 162 163 conf->meth = &WIN32_method; 164 conf->meth_data = (void *)CONF_type_win32; 165 conf->data = NULL; 166 167 return 1; 168 } 169 170 static int 171 def_destroy(CONF *conf) 172 { 173 if (def_destroy_data(conf)) { 174 free(conf); 175 return 1; 176 } 177 return 0; 178 } 179 180 static int 181 def_destroy_data(CONF *conf) 182 { 183 if (conf == NULL) 184 return 0; 185 _CONF_free_data(conf); 186 return 1; 187 } 188 189 static int 190 def_load(CONF *conf, const char *name, long *line) 191 { 192 int ret; 193 BIO *in = NULL; 194 195 in = BIO_new_file(name, "rb"); 196 if (in == NULL) { 197 if (ERR_GET_REASON(ERR_peek_last_error()) == BIO_R_NO_SUCH_FILE) 198 CONFerr(CONF_F_DEF_LOAD, CONF_R_NO_SUCH_FILE); 199 else 200 CONFerr(CONF_F_DEF_LOAD, ERR_R_SYS_LIB); 201 return 0; 202 } 203 204 ret = def_load_bio(conf, in, line); 205 BIO_free(in); 206 207 return ret; 208 } 209 210 static int 211 def_load_bio(CONF *conf, BIO *in, long *line) 212 { 213 /* The macro BUFSIZE conflicts with a system macro in VxWorks */ 214 #define CONFBUFSIZE 512 215 int bufnum = 0, i, ii; 216 BUF_MEM *buff = NULL; 217 char *s, *p, *end; 218 int again; 219 long eline = 0; 220 CONF_VALUE *v = NULL, *tv; 221 CONF_VALUE *sv = NULL; 222 char *section = NULL, *buf; 223 char *start, *psection, *pname; 224 void *h = (void *)(conf->data); 225 226 if ((buff = BUF_MEM_new()) == NULL) { 227 CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_BUF_LIB); 228 goto err; 229 } 230 231 section = malloc(10); 232 if (section == NULL) { 233 CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE); 234 goto err; 235 } 236 strlcpy(section, "default",10); 237 238 if (_CONF_new_data(conf) == 0) { 239 CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE); 240 goto err; 241 } 242 243 sv = _CONF_new_section(conf, section); 244 if (sv == NULL) { 245 CONFerr(CONF_F_DEF_LOAD_BIO, 246 CONF_R_UNABLE_TO_CREATE_NEW_SECTION); 247 goto err; 248 } 249 250 bufnum = 0; 251 again = 0; 252 for (;;) { 253 if (!BUF_MEM_grow(buff, bufnum + CONFBUFSIZE)) { 254 CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_BUF_LIB); 255 goto err; 256 } 257 p = &(buff->data[bufnum]); 258 *p = '\0'; 259 BIO_gets(in, p, CONFBUFSIZE - 1); 260 p[CONFBUFSIZE - 1] = '\0'; 261 ii = i = strlen(p); 262 if (i == 0 && !again) 263 break; 264 again = 0; 265 while (i > 0) { 266 if ((p[i - 1] != '\r') && (p[i - 1] != '\n')) 267 break; 268 else 269 i--; 270 } 271 /* we removed some trailing stuff so there is a new 272 * line on the end. */ 273 if (ii && i == ii) 274 again = 1; /* long line */ 275 else { 276 p[i] = '\0'; 277 eline++; /* another input line */ 278 } 279 280 /* we now have a line with trailing \r\n removed */ 281 282 /* i is the number of bytes */ 283 bufnum += i; 284 285 v = NULL; 286 /* check for line continuation */ 287 if (bufnum >= 1) { 288 /* If we have bytes and the last char '\\' and 289 * second last char is not '\\' */ 290 p = &(buff->data[bufnum - 1]); 291 if (IS_ESC(conf, p[0]) && 292 ((bufnum <= 1) || !IS_ESC(conf, p[-1]))) { 293 bufnum--; 294 again = 1; 295 } 296 } 297 if (again) 298 continue; 299 bufnum = 0; 300 buf = buff->data; 301 302 clear_comments(conf, buf); 303 s = eat_ws(conf, buf); 304 if (IS_EOF(conf, *s)) 305 continue; /* blank line */ 306 if (*s == '[') { 307 char *ss; 308 309 s++; 310 start = eat_ws(conf, s); 311 ss = start; 312 again: 313 end = eat_alpha_numeric(conf, ss); 314 p = eat_ws(conf, end); 315 if (*p != ']') { 316 if (*p != '\0' && ss != p) { 317 ss = p; 318 goto again; 319 } 320 CONFerr(CONF_F_DEF_LOAD_BIO, 321 CONF_R_MISSING_CLOSE_SQUARE_BRACKET); 322 goto err; 323 } 324 *end = '\0'; 325 if (!str_copy(conf, NULL, §ion, start)) 326 goto err; 327 if ((sv = _CONF_get_section(conf, section)) == NULL) 328 sv = _CONF_new_section(conf, section); 329 if (sv == NULL) { 330 CONFerr(CONF_F_DEF_LOAD_BIO, 331 CONF_R_UNABLE_TO_CREATE_NEW_SECTION); 332 goto err; 333 } 334 continue; 335 } else { 336 pname = s; 337 psection = NULL; 338 end = eat_alpha_numeric(conf, s); 339 if ((end[0] == ':') && (end[1] == ':')) { 340 *end = '\0'; 341 end += 2; 342 psection = pname; 343 pname = end; 344 end = eat_alpha_numeric(conf, end); 345 } 346 p = eat_ws(conf, end); 347 if (*p != '=') { 348 CONFerr(CONF_F_DEF_LOAD_BIO, 349 CONF_R_MISSING_EQUAL_SIGN); 350 goto err; 351 } 352 *end = '\0'; 353 p++; 354 start = eat_ws(conf, p); 355 while (!IS_EOF(conf, *p)) 356 p++; 357 p--; 358 while ((p != start) && (IS_WS(conf, *p))) 359 p--; 360 p++; 361 *p = '\0'; 362 363 if (!(v = malloc(sizeof(CONF_VALUE)))) { 364 CONFerr(CONF_F_DEF_LOAD_BIO, 365 ERR_R_MALLOC_FAILURE); 366 goto err; 367 } 368 if (psection == NULL) 369 psection = section; 370 v->name = strdup(pname); 371 v->value = NULL; 372 if (v->name == NULL) { 373 CONFerr(CONF_F_DEF_LOAD_BIO, 374 ERR_R_MALLOC_FAILURE); 375 goto err; 376 } 377 if (!str_copy(conf, psection, &(v->value), start)) 378 goto err; 379 380 if (strcmp(psection, section) != 0) { 381 if ((tv = _CONF_get_section(conf, psection)) 382 == NULL) 383 tv = _CONF_new_section(conf, psection); 384 if (tv == NULL) { 385 CONFerr(CONF_F_DEF_LOAD_BIO, 386 CONF_R_UNABLE_TO_CREATE_NEW_SECTION); 387 goto err; 388 } 389 } else 390 tv = sv; 391 #if 1 392 if (_CONF_add_string(conf, tv, v) == 0) { 393 CONFerr(CONF_F_DEF_LOAD_BIO, 394 ERR_R_MALLOC_FAILURE); 395 goto err; 396 } 397 #else 398 v->section = tv->section; 399 if (!sk_CONF_VALUE_push(ts, v)) { 400 CONFerr(CONF_F_DEF_LOAD_BIO, 401 ERR_R_MALLOC_FAILURE); 402 goto err; 403 } 404 vv = (CONF_VALUE *)lh_insert(conf->data, v); 405 if (vv != NULL) { 406 sk_CONF_VALUE_delete_ptr(ts, vv); 407 free(vv->name); 408 free(vv->value); 409 free(vv); 410 } 411 #endif 412 v = NULL; 413 } 414 } 415 if (buff != NULL) 416 BUF_MEM_free(buff); 417 free(section); 418 return (1); 419 420 err: 421 if (buff != NULL) 422 BUF_MEM_free(buff); 423 free(section); 424 if (line != NULL) 425 *line = eline; 426 ERR_asprintf_error_data("line %ld", eline); 427 if ((h != conf->data) && (conf->data != NULL)) { 428 CONF_free(conf->data); 429 conf->data = NULL; 430 } 431 if (v != NULL) { 432 free(v->name); 433 free(v->value); 434 free(v); 435 } 436 return (0); 437 } 438 439 static void 440 clear_comments(CONF *conf, char *p) 441 { 442 for (;;) { 443 if (IS_FCOMMENT(conf, *p)) { 444 *p = '\0'; 445 return; 446 } 447 if (!IS_WS(conf, *p)) { 448 break; 449 } 450 p++; 451 } 452 453 for (;;) { 454 if (IS_COMMENT(conf, *p)) { 455 *p = '\0'; 456 return; 457 } 458 if (IS_DQUOTE(conf, *p)) { 459 p = scan_dquote(conf, p); 460 continue; 461 } 462 if (IS_QUOTE(conf, *p)) { 463 p = scan_quote(conf, p); 464 continue; 465 } 466 if (IS_ESC(conf, *p)) { 467 p = scan_esc(conf, p); 468 continue; 469 } 470 if (IS_EOF(conf, *p)) 471 return; 472 else 473 p++; 474 } 475 } 476 477 static int 478 str_copy(CONF *conf, char *section, char **pto, char *from) 479 { 480 int q, r,rr = 0, to = 0, len = 0; 481 char *s, *e, *rp, *p, *rrp, *np, *cp, v; 482 BUF_MEM *buf; 483 484 if ((buf = BUF_MEM_new()) == NULL) 485 return (0); 486 487 len = strlen(from) + 1; 488 if (!BUF_MEM_grow(buf, len)) 489 goto err; 490 491 for (;;) { 492 if (IS_QUOTE(conf, *from)) { 493 q = *from; 494 from++; 495 while (!IS_EOF(conf, *from) && (*from != q)) { 496 if (IS_ESC(conf, *from)) { 497 from++; 498 if (IS_EOF(conf, *from)) 499 break; 500 } 501 buf->data[to++] = *(from++); 502 } 503 if (*from == q) 504 from++; 505 } else if (IS_DQUOTE(conf, *from)) { 506 q = *from; 507 from++; 508 while (!IS_EOF(conf, *from)) { 509 if (*from == q) { 510 if (*(from + 1) == q) { 511 from++; 512 } else { 513 break; 514 } 515 } 516 buf->data[to++] = *(from++); 517 } 518 if (*from == q) 519 from++; 520 } else if (IS_ESC(conf, *from)) { 521 from++; 522 v = *(from++); 523 if (IS_EOF(conf, v)) 524 break; 525 else if (v == 'r') 526 v = '\r'; 527 else if (v == 'n') 528 v = '\n'; 529 else if (v == 'b') 530 v = '\b'; 531 else if (v == 't') 532 v = '\t'; 533 buf->data[to++] = v; 534 } else if (IS_EOF(conf, *from)) 535 break; 536 else if (*from == '$') { 537 /* try to expand it */ 538 rrp = NULL; 539 s = &(from[1]); 540 if (*s == '{') 541 q = '}'; 542 else if (*s == '(') 543 q = ')'; 544 else 545 q = 0; 546 547 if (q) 548 s++; 549 cp = section; 550 e = np = s; 551 while (IS_ALPHA_NUMERIC(conf, *e)) 552 e++; 553 if ((e[0] == ':') && (e[1] == ':')) { 554 cp = np; 555 rrp = e; 556 rr = *e; 557 *rrp = '\0'; 558 e += 2; 559 np = e; 560 while (IS_ALPHA_NUMERIC(conf, *e)) 561 e++; 562 } 563 r = *e; 564 *e = '\0'; 565 rp = e; 566 if (q) { 567 if (r != q) { 568 CONFerr(CONF_F_STR_COPY, 569 CONF_R_NO_CLOSE_BRACE); 570 goto err; 571 } 572 e++; 573 } 574 /* So at this point we have 575 * np which is the start of the name string which is 576 * '\0' terminated. 577 * cp which is the start of the section string which is 578 * '\0' terminated. 579 * e is the 'next point after'. 580 * r and rr are the chars replaced by the '\0' 581 * rp and rrp is where 'r' and 'rr' came from. 582 */ 583 p = _CONF_get_string(conf, cp, np); 584 if (rrp != NULL) 585 *rrp = rr; 586 *rp = r; 587 if (p == NULL) { 588 CONFerr(CONF_F_STR_COPY, 589 CONF_R_VARIABLE_HAS_NO_VALUE); 590 goto err; 591 } 592 BUF_MEM_grow_clean(buf, 593 (strlen(p) + buf->length - (e - from))); 594 while (*p) 595 buf->data[to++] = *(p++); 596 597 /* Since we change the pointer 'from', we also have 598 to change the perceived length of the string it 599 points at. /RL */ 600 len -= e - from; 601 from = e; 602 603 /* In case there were no braces or parenthesis around 604 the variable reference, we have to put back the 605 character that was replaced with a '\0'. /RL */ 606 *rp = r; 607 } else 608 buf->data[to++] = *(from++); 609 } 610 buf->data[to]='\0'; 611 free(*pto); 612 *pto = buf->data; 613 free(buf); 614 return (1); 615 616 err: 617 if (buf != NULL) 618 BUF_MEM_free(buf); 619 return (0); 620 } 621 622 static char * 623 eat_ws(CONF *conf, char *p) 624 { 625 while (IS_WS(conf, *p) && (!IS_EOF(conf, *p))) 626 p++; 627 return (p); 628 } 629 630 static char * 631 eat_alpha_numeric(CONF *conf, char *p) 632 { 633 for (;;) { 634 if (IS_ESC(conf, *p)) { 635 p = scan_esc(conf, p); 636 continue; 637 } 638 if (!IS_ALPHA_NUMERIC_PUNCT(conf, *p)) 639 return (p); 640 p++; 641 } 642 } 643 644 static char * 645 scan_quote(CONF *conf, char *p) 646 { 647 int q = *p; 648 649 p++; 650 while (!(IS_EOF(conf, *p)) && (*p != q)) { 651 if (IS_ESC(conf, *p)) { 652 p++; 653 if (IS_EOF(conf, *p)) 654 return (p); 655 } 656 p++; 657 } 658 if (*p == q) 659 p++; 660 return (p); 661 } 662 663 664 static char * 665 scan_dquote(CONF *conf, char *p) 666 { 667 int q = *p; 668 669 p++; 670 while (!(IS_EOF(conf, *p))) { 671 if (*p == q) { 672 if (*(p + 1) == q) { 673 p++; 674 } else { 675 break; 676 } 677 } 678 p++; 679 } 680 if (*p == q) 681 p++; 682 return (p); 683 } 684 685 static void 686 dump_value_doall_arg(CONF_VALUE *a, BIO *out) 687 { 688 if (a->name) 689 BIO_printf(out, "[%s] %s=%s\n", a->section, a->name, a->value); 690 else 691 BIO_printf(out, "[[%s]]\n", a->section); 692 } 693 694 static IMPLEMENT_LHASH_DOALL_ARG_FN(dump_value, CONF_VALUE, BIO) 695 696 static int 697 def_dump(const CONF *conf, BIO *out) 698 { 699 lh_CONF_VALUE_doall_arg(conf->data, LHASH_DOALL_ARG_FN(dump_value), 700 BIO, out); 701 return 1; 702 } 703 704 static int 705 def_is_number(const CONF *conf, char c) 706 { 707 return IS_NUMBER(conf, c); 708 } 709 710 static int 711 def_to_int(const CONF *conf, char c) 712 { 713 return c - '0'; 714 } 715