1 /* $OpenBSD: conf_def.c,v 1.32 2017/01/29 17:49:22 beck 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 CONFerror(CONF_R_NO_SUCH_FILE); 199 else 200 CONFerror(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 CONFerror(ERR_R_BUF_LIB); 228 goto err; 229 } 230 231 section = strdup("default"); 232 if (section == NULL) { 233 CONFerror(ERR_R_MALLOC_FAILURE); 234 goto err; 235 } 236 237 if (_CONF_new_data(conf) == 0) { 238 CONFerror(ERR_R_MALLOC_FAILURE); 239 goto err; 240 } 241 242 sv = _CONF_new_section(conf, section); 243 if (sv == NULL) { 244 CONFerror(CONF_R_UNABLE_TO_CREATE_NEW_SECTION); 245 goto err; 246 } 247 248 bufnum = 0; 249 again = 0; 250 for (;;) { 251 if (!BUF_MEM_grow(buff, bufnum + CONFBUFSIZE)) { 252 CONFerror(ERR_R_BUF_LIB); 253 goto err; 254 } 255 p = &(buff->data[bufnum]); 256 *p = '\0'; 257 BIO_gets(in, p, CONFBUFSIZE - 1); 258 p[CONFBUFSIZE - 1] = '\0'; 259 ii = i = strlen(p); 260 if (i == 0 && !again) 261 break; 262 again = 0; 263 while (i > 0) { 264 if ((p[i - 1] != '\r') && (p[i - 1] != '\n')) 265 break; 266 else 267 i--; 268 } 269 /* we removed some trailing stuff so there is a new 270 * line on the end. */ 271 if (ii && i == ii) 272 again = 1; /* long line */ 273 else { 274 p[i] = '\0'; 275 eline++; /* another input line */ 276 } 277 278 /* we now have a line with trailing \r\n removed */ 279 280 /* i is the number of bytes */ 281 bufnum += i; 282 283 v = NULL; 284 /* check for line continuation */ 285 if (bufnum >= 1) { 286 /* If we have bytes and the last char '\\' and 287 * second last char is not '\\' */ 288 p = &(buff->data[bufnum - 1]); 289 if (IS_ESC(conf, p[0]) && 290 ((bufnum <= 1) || !IS_ESC(conf, p[-1]))) { 291 bufnum--; 292 again = 1; 293 } 294 } 295 if (again) 296 continue; 297 bufnum = 0; 298 buf = buff->data; 299 300 clear_comments(conf, buf); 301 s = eat_ws(conf, buf); 302 if (IS_EOF(conf, *s)) 303 continue; /* blank line */ 304 if (*s == '[') { 305 char *ss; 306 307 s++; 308 start = eat_ws(conf, s); 309 ss = start; 310 again: 311 end = eat_alpha_numeric(conf, ss); 312 p = eat_ws(conf, end); 313 if (*p != ']') { 314 if (*p != '\0' && ss != p) { 315 ss = p; 316 goto again; 317 } 318 CONFerror(CONF_R_MISSING_CLOSE_SQUARE_BRACKET); 319 goto err; 320 } 321 *end = '\0'; 322 if (!str_copy(conf, NULL, §ion, start)) 323 goto err; 324 if ((sv = _CONF_get_section(conf, section)) == NULL) 325 sv = _CONF_new_section(conf, section); 326 if (sv == NULL) { 327 CONFerror(CONF_R_UNABLE_TO_CREATE_NEW_SECTION); 328 goto err; 329 } 330 continue; 331 } else { 332 pname = s; 333 psection = NULL; 334 end = eat_alpha_numeric(conf, s); 335 if ((end[0] == ':') && (end[1] == ':')) { 336 *end = '\0'; 337 end += 2; 338 psection = pname; 339 pname = end; 340 end = eat_alpha_numeric(conf, end); 341 } 342 p = eat_ws(conf, end); 343 if (*p != '=') { 344 CONFerror(CONF_R_MISSING_EQUAL_SIGN); 345 goto err; 346 } 347 *end = '\0'; 348 p++; 349 start = eat_ws(conf, p); 350 while (!IS_EOF(conf, *p)) 351 p++; 352 p--; 353 while ((p != start) && (IS_WS(conf, *p))) 354 p--; 355 p++; 356 *p = '\0'; 357 358 if (!(v = malloc(sizeof(CONF_VALUE)))) { 359 CONFerror(ERR_R_MALLOC_FAILURE); 360 goto err; 361 } 362 if (psection == NULL) 363 psection = section; 364 v->name = strdup(pname); 365 v->value = NULL; 366 if (v->name == NULL) { 367 CONFerror(ERR_R_MALLOC_FAILURE); 368 goto err; 369 } 370 if (!str_copy(conf, psection, &(v->value), start)) 371 goto err; 372 373 if (strcmp(psection, section) != 0) { 374 if ((tv = _CONF_get_section(conf, psection)) 375 == NULL) 376 tv = _CONF_new_section(conf, psection); 377 if (tv == NULL) { 378 CONFerror(CONF_R_UNABLE_TO_CREATE_NEW_SECTION); 379 goto err; 380 } 381 } else 382 tv = sv; 383 384 if (_CONF_add_string(conf, tv, v) == 0) { 385 CONFerror(ERR_R_MALLOC_FAILURE); 386 goto err; 387 } 388 v = NULL; 389 } 390 } 391 if (buff != NULL) 392 BUF_MEM_free(buff); 393 free(section); 394 return (1); 395 396 err: 397 if (buff != NULL) 398 BUF_MEM_free(buff); 399 free(section); 400 if (line != NULL) 401 *line = eline; 402 ERR_asprintf_error_data("line %ld", eline); 403 if ((h != conf->data) && (conf->data != NULL)) { 404 CONF_free(conf->data); 405 conf->data = NULL; 406 } 407 if (v != NULL) { 408 free(v->name); 409 free(v->value); 410 free(v); 411 } 412 return (0); 413 } 414 415 static void 416 clear_comments(CONF *conf, char *p) 417 { 418 for (;;) { 419 if (IS_FCOMMENT(conf, *p)) { 420 *p = '\0'; 421 return; 422 } 423 if (!IS_WS(conf, *p)) { 424 break; 425 } 426 p++; 427 } 428 429 for (;;) { 430 if (IS_COMMENT(conf, *p)) { 431 *p = '\0'; 432 return; 433 } 434 if (IS_DQUOTE(conf, *p)) { 435 p = scan_dquote(conf, p); 436 continue; 437 } 438 if (IS_QUOTE(conf, *p)) { 439 p = scan_quote(conf, p); 440 continue; 441 } 442 if (IS_ESC(conf, *p)) { 443 p = scan_esc(conf, p); 444 continue; 445 } 446 if (IS_EOF(conf, *p)) 447 return; 448 else 449 p++; 450 } 451 } 452 453 static int 454 str_copy(CONF *conf, char *section, char **pto, char *from) 455 { 456 int q, r,rr = 0, to = 0, len = 0; 457 char *s, *e, *rp, *p, *rrp, *np, *cp, v; 458 BUF_MEM *buf; 459 460 if ((buf = BUF_MEM_new()) == NULL) 461 return (0); 462 463 len = strlen(from) + 1; 464 if (!BUF_MEM_grow(buf, len)) 465 goto err; 466 467 for (;;) { 468 if (IS_QUOTE(conf, *from)) { 469 q = *from; 470 from++; 471 while (!IS_EOF(conf, *from) && (*from != q)) { 472 if (IS_ESC(conf, *from)) { 473 from++; 474 if (IS_EOF(conf, *from)) 475 break; 476 } 477 buf->data[to++] = *(from++); 478 } 479 if (*from == q) 480 from++; 481 } else if (IS_DQUOTE(conf, *from)) { 482 q = *from; 483 from++; 484 while (!IS_EOF(conf, *from)) { 485 if (*from == q) { 486 if (*(from + 1) == q) { 487 from++; 488 } else { 489 break; 490 } 491 } 492 buf->data[to++] = *(from++); 493 } 494 if (*from == q) 495 from++; 496 } else if (IS_ESC(conf, *from)) { 497 from++; 498 v = *(from++); 499 if (IS_EOF(conf, v)) 500 break; 501 else if (v == 'r') 502 v = '\r'; 503 else if (v == 'n') 504 v = '\n'; 505 else if (v == 'b') 506 v = '\b'; 507 else if (v == 't') 508 v = '\t'; 509 buf->data[to++] = v; 510 } else if (IS_EOF(conf, *from)) 511 break; 512 else if (*from == '$') { 513 /* try to expand it */ 514 rrp = NULL; 515 s = &(from[1]); 516 if (*s == '{') 517 q = '}'; 518 else if (*s == '(') 519 q = ')'; 520 else 521 q = 0; 522 523 if (q) 524 s++; 525 cp = section; 526 e = np = s; 527 while (IS_ALPHA_NUMERIC(conf, *e)) 528 e++; 529 if ((e[0] == ':') && (e[1] == ':')) { 530 cp = np; 531 rrp = e; 532 rr = *e; 533 *rrp = '\0'; 534 e += 2; 535 np = e; 536 while (IS_ALPHA_NUMERIC(conf, *e)) 537 e++; 538 } 539 r = *e; 540 *e = '\0'; 541 rp = e; 542 if (q) { 543 if (r != q) { 544 CONFerror(CONF_R_NO_CLOSE_BRACE); 545 goto err; 546 } 547 e++; 548 } 549 /* So at this point we have 550 * np which is the start of the name string which is 551 * '\0' terminated. 552 * cp which is the start of the section string which is 553 * '\0' terminated. 554 * e is the 'next point after'. 555 * r and rr are the chars replaced by the '\0' 556 * rp and rrp is where 'r' and 'rr' came from. 557 */ 558 p = _CONF_get_string(conf, cp, np); 559 if (rrp != NULL) 560 *rrp = rr; 561 *rp = r; 562 if (p == NULL) { 563 CONFerror(CONF_R_VARIABLE_HAS_NO_VALUE); 564 goto err; 565 } 566 if (!BUF_MEM_grow_clean(buf, 567 (strlen(p) + buf->length - (e - from)))) { 568 CONFerror(CONF_R_MODULE_INITIALIZATION_ERROR); 569 goto err; 570 } 571 while (*p) 572 buf->data[to++] = *(p++); 573 574 /* Since we change the pointer 'from', we also have 575 to change the perceived length of the string it 576 points at. /RL */ 577 len -= e - from; 578 from = e; 579 580 /* In case there were no braces or parenthesis around 581 the variable reference, we have to put back the 582 character that was replaced with a '\0'. /RL */ 583 *rp = r; 584 } else 585 buf->data[to++] = *(from++); 586 } 587 buf->data[to]='\0'; 588 free(*pto); 589 *pto = buf->data; 590 free(buf); 591 return (1); 592 593 err: 594 if (buf != NULL) 595 BUF_MEM_free(buf); 596 return (0); 597 } 598 599 static char * 600 eat_ws(CONF *conf, char *p) 601 { 602 while (IS_WS(conf, *p) && (!IS_EOF(conf, *p))) 603 p++; 604 return (p); 605 } 606 607 static char * 608 eat_alpha_numeric(CONF *conf, char *p) 609 { 610 for (;;) { 611 if (IS_ESC(conf, *p)) { 612 p = scan_esc(conf, p); 613 continue; 614 } 615 if (!IS_ALPHA_NUMERIC_PUNCT(conf, *p)) 616 return (p); 617 p++; 618 } 619 } 620 621 static char * 622 scan_quote(CONF *conf, char *p) 623 { 624 int q = *p; 625 626 p++; 627 while (!(IS_EOF(conf, *p)) && (*p != q)) { 628 if (IS_ESC(conf, *p)) { 629 p++; 630 if (IS_EOF(conf, *p)) 631 return (p); 632 } 633 p++; 634 } 635 if (*p == q) 636 p++; 637 return (p); 638 } 639 640 641 static char * 642 scan_dquote(CONF *conf, char *p) 643 { 644 int q = *p; 645 646 p++; 647 while (!(IS_EOF(conf, *p))) { 648 if (*p == q) { 649 if (*(p + 1) == q) { 650 p++; 651 } else { 652 break; 653 } 654 } 655 p++; 656 } 657 if (*p == q) 658 p++; 659 return (p); 660 } 661 662 static void 663 dump_value_doall_arg(CONF_VALUE *a, BIO *out) 664 { 665 if (a->name) 666 BIO_printf(out, "[%s] %s=%s\n", a->section, a->name, a->value); 667 else 668 BIO_printf(out, "[[%s]]\n", a->section); 669 } 670 671 static IMPLEMENT_LHASH_DOALL_ARG_FN(dump_value, CONF_VALUE, BIO) 672 673 static int 674 def_dump(const CONF *conf, BIO *out) 675 { 676 lh_CONF_VALUE_doall_arg(conf->data, LHASH_DOALL_ARG_FN(dump_value), 677 BIO, out); 678 return 1; 679 } 680 681 static int 682 def_is_number(const CONF *conf, char c) 683 { 684 return IS_NUMBER(conf, c); 685 } 686 687 static int 688 def_to_int(const CONF *conf, char c) 689 { 690 return c - '0'; 691 } 692