1 /* crypto/conf/conf.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 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 #include "cryptlib.h" 64 #include <openssl/stack.h> 65 #include <openssl/lhash.h> 66 #include <openssl/conf.h> 67 #include <openssl/conf_api.h> 68 #include "conf_def.h" 69 #include <openssl/buffer.h> 70 #include <openssl/err.h> 71 72 static char *eat_ws(CONF *conf, char *p); 73 static char *eat_alpha_numeric(CONF *conf, char *p); 74 static void clear_comments(CONF *conf, char *p); 75 static int str_copy(CONF *conf,char *section,char **to, char *from); 76 static char *scan_quote(CONF *conf, char *p); 77 static char *scan_dquote(CONF *conf, char *p); 78 #define scan_esc(conf,p) (((IS_EOF((conf),(p)[1]))?((p)+1):((p)+2))) 79 80 static CONF *def_create(CONF_METHOD *meth); 81 static int def_init_default(CONF *conf); 82 static int def_init_WIN32(CONF *conf); 83 static int def_destroy(CONF *conf); 84 static int def_destroy_data(CONF *conf); 85 static int def_load(CONF *conf, const char *name, long *eline); 86 static int def_load_bio(CONF *conf, BIO *bp, long *eline); 87 static int def_dump(const CONF *conf, BIO *bp); 88 static int def_is_number(const CONF *conf, char c); 89 static int def_to_int(const CONF *conf, char c); 90 91 const char CONF_def_version[]="CONF_def" OPENSSL_VERSION_PTEXT; 92 93 static CONF_METHOD default_method = { 94 "OpenSSL default", 95 def_create, 96 def_init_default, 97 def_destroy, 98 def_destroy_data, 99 def_load_bio, 100 def_dump, 101 def_is_number, 102 def_to_int, 103 def_load 104 }; 105 106 static CONF_METHOD WIN32_method = { 107 "WIN32", 108 def_create, 109 def_init_WIN32, 110 def_destroy, 111 def_destroy_data, 112 def_load_bio, 113 def_dump, 114 def_is_number, 115 def_to_int, 116 def_load 117 }; 118 119 CONF_METHOD *NCONF_default() 120 { 121 return &default_method; 122 } 123 CONF_METHOD *NCONF_WIN32() 124 { 125 return &WIN32_method; 126 } 127 128 static CONF *def_create(CONF_METHOD *meth) 129 { 130 CONF *ret; 131 132 ret = OPENSSL_malloc(sizeof(CONF) + sizeof(unsigned short *)); 133 if (ret) 134 if (meth->init(ret) == 0) 135 { 136 OPENSSL_free(ret); 137 ret = NULL; 138 } 139 return ret; 140 } 141 142 static int def_init_default(CONF *conf) 143 { 144 if (conf == NULL) 145 return 0; 146 147 conf->meth = &default_method; 148 conf->meth_data = CONF_type_default; 149 conf->data = NULL; 150 151 return 1; 152 } 153 154 static int def_init_WIN32(CONF *conf) 155 { 156 if (conf == NULL) 157 return 0; 158 159 conf->meth = &WIN32_method; 160 conf->meth_data = (void *)CONF_type_win32; 161 conf->data = NULL; 162 163 return 1; 164 } 165 166 static int def_destroy(CONF *conf) 167 { 168 if (def_destroy_data(conf)) 169 { 170 OPENSSL_free(conf); 171 return 1; 172 } 173 return 0; 174 } 175 176 static int def_destroy_data(CONF *conf) 177 { 178 if (conf == NULL) 179 return 0; 180 _CONF_free_data(conf); 181 return 1; 182 } 183 184 static int def_load(CONF *conf, const char *name, long *line) 185 { 186 int ret; 187 BIO *in=NULL; 188 189 #ifdef OPENSSL_SYS_VMS 190 in=BIO_new_file(name, "r"); 191 #else 192 in=BIO_new_file(name, "rb"); 193 #endif 194 if (in == NULL) 195 { 196 if (ERR_GET_REASON(ERR_peek_last_error()) == BIO_R_NO_SUCH_FILE) 197 CONFerr(CONF_F_DEF_LOAD,CONF_R_NO_SUCH_FILE); 198 else 199 CONFerr(CONF_F_DEF_LOAD,ERR_R_SYS_LIB); 200 return 0; 201 } 202 203 ret = def_load_bio(conf, in, line); 204 BIO_free(in); 205 206 return ret; 207 } 208 209 static int def_load_bio(CONF *conf, BIO *in, long *line) 210 { 211 /* The macro BUFSIZE conflicts with a system macro in VxWorks */ 212 #define CONFBUFSIZE 512 213 int bufnum=0,i,ii; 214 BUF_MEM *buff=NULL; 215 char *s,*p,*end; 216 int again; 217 long eline=0; 218 char btmp[DECIMAL_SIZE(eline)+1]; 219 CONF_VALUE *v=NULL,*tv; 220 CONF_VALUE *sv=NULL; 221 char *section=NULL,*buf; 222 char *start,*psection,*pname; 223 void *h = (void *)(conf->data); 224 225 if ((buff=BUF_MEM_new()) == NULL) 226 { 227 CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_BUF_LIB); 228 goto err; 229 } 230 231 section=(char *)OPENSSL_malloc(10); 232 if (section == NULL) 233 { 234 CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_MALLOC_FAILURE); 235 goto err; 236 } 237 BUF_strlcpy(section,"default",10); 238 239 if (_CONF_new_data(conf) == 0) 240 { 241 CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_MALLOC_FAILURE); 242 goto err; 243 } 244 245 sv=_CONF_new_section(conf,section); 246 if (sv == NULL) 247 { 248 CONFerr(CONF_F_DEF_LOAD_BIO, 249 CONF_R_UNABLE_TO_CREATE_NEW_SECTION); 250 goto err; 251 } 252 253 bufnum=0; 254 again=0; 255 for (;;) 256 { 257 if (!BUF_MEM_grow(buff,bufnum+CONFBUFSIZE)) 258 { 259 CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_BUF_LIB); 260 goto err; 261 } 262 p= &(buff->data[bufnum]); 263 *p='\0'; 264 BIO_gets(in, p, CONFBUFSIZE-1); 265 p[CONFBUFSIZE-1]='\0'; 266 ii=i=strlen(p); 267 if (i == 0 && !again) break; 268 again=0; 269 while (i > 0) 270 { 271 if ((p[i-1] != '\r') && (p[i-1] != '\n')) 272 break; 273 else 274 i--; 275 } 276 /* we removed some trailing stuff so there is a new 277 * line on the end. */ 278 if (ii && i == ii) 279 again=1; /* long line */ 280 else 281 { 282 p[i]='\0'; 283 eline++; /* another input line */ 284 } 285 286 /* we now have a line with trailing \r\n removed */ 287 288 /* i is the number of bytes */ 289 bufnum+=i; 290 291 v=NULL; 292 /* check for line continuation */ 293 if (bufnum >= 1) 294 { 295 /* If we have bytes and the last char '\\' and 296 * second last char is not '\\' */ 297 p= &(buff->data[bufnum-1]); 298 if (IS_ESC(conf,p[0]) && 299 ((bufnum <= 1) || !IS_ESC(conf,p[-1]))) 300 { 301 bufnum--; 302 again=1; 303 } 304 } 305 if (again) continue; 306 bufnum=0; 307 buf=buff->data; 308 309 clear_comments(conf, buf); 310 s=eat_ws(conf, buf); 311 if (IS_EOF(conf,*s)) continue; /* blank line */ 312 if (*s == '[') 313 { 314 char *ss; 315 316 s++; 317 start=eat_ws(conf, s); 318 ss=start; 319 again: 320 end=eat_alpha_numeric(conf, ss); 321 p=eat_ws(conf, end); 322 if (*p != ']') 323 { 324 if (*p != '\0') 325 { 326 ss=p; 327 goto again; 328 } 329 CONFerr(CONF_F_DEF_LOAD_BIO, 330 CONF_R_MISSING_CLOSE_SQUARE_BRACKET); 331 goto err; 332 } 333 *end='\0'; 334 if (!str_copy(conf,NULL,§ion,start)) goto err; 335 if ((sv=_CONF_get_section(conf,section)) == NULL) 336 sv=_CONF_new_section(conf,section); 337 if (sv == NULL) 338 { 339 CONFerr(CONF_F_DEF_LOAD_BIO, 340 CONF_R_UNABLE_TO_CREATE_NEW_SECTION); 341 goto err; 342 } 343 continue; 344 } 345 else 346 { 347 pname=s; 348 psection=NULL; 349 end=eat_alpha_numeric(conf, s); 350 if ((end[0] == ':') && (end[1] == ':')) 351 { 352 *end='\0'; 353 end+=2; 354 psection=pname; 355 pname=end; 356 end=eat_alpha_numeric(conf, end); 357 } 358 p=eat_ws(conf, end); 359 if (*p != '=') 360 { 361 CONFerr(CONF_F_DEF_LOAD_BIO, 362 CONF_R_MISSING_EQUAL_SIGN); 363 goto err; 364 } 365 *end='\0'; 366 p++; 367 start=eat_ws(conf, p); 368 while (!IS_EOF(conf,*p)) 369 p++; 370 p--; 371 while ((p != start) && (IS_WS(conf,*p))) 372 p--; 373 p++; 374 *p='\0'; 375 376 if (!(v=(CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE)))) 377 { 378 CONFerr(CONF_F_DEF_LOAD_BIO, 379 ERR_R_MALLOC_FAILURE); 380 goto err; 381 } 382 if (psection == NULL) psection=section; 383 v->name=(char *)OPENSSL_malloc(strlen(pname)+1); 384 v->value=NULL; 385 if (v->name == NULL) 386 { 387 CONFerr(CONF_F_DEF_LOAD_BIO, 388 ERR_R_MALLOC_FAILURE); 389 goto err; 390 } 391 BUF_strlcpy(v->name,pname,strlen(pname)+1); 392 if (!str_copy(conf,psection,&(v->value),start)) goto err; 393 394 if (strcmp(psection,section) != 0) 395 { 396 if ((tv=_CONF_get_section(conf,psection)) 397 == NULL) 398 tv=_CONF_new_section(conf,psection); 399 if (tv == NULL) 400 { 401 CONFerr(CONF_F_DEF_LOAD_BIO, 402 CONF_R_UNABLE_TO_CREATE_NEW_SECTION); 403 goto err; 404 } 405 } 406 else 407 tv=sv; 408 #if 1 409 if (_CONF_add_string(conf, tv, v) == 0) 410 { 411 CONFerr(CONF_F_DEF_LOAD_BIO, 412 ERR_R_MALLOC_FAILURE); 413 goto err; 414 } 415 #else 416 v->section=tv->section; 417 if (!sk_CONF_VALUE_push(ts,v)) 418 { 419 CONFerr(CONF_F_DEF_LOAD_BIO, 420 ERR_R_MALLOC_FAILURE); 421 goto err; 422 } 423 vv=(CONF_VALUE *)lh_insert(conf->data,v); 424 if (vv != NULL) 425 { 426 sk_CONF_VALUE_delete_ptr(ts,vv); 427 OPENSSL_free(vv->name); 428 OPENSSL_free(vv->value); 429 OPENSSL_free(vv); 430 } 431 #endif 432 v=NULL; 433 } 434 } 435 if (buff != NULL) BUF_MEM_free(buff); 436 if (section != NULL) OPENSSL_free(section); 437 return(1); 438 err: 439 if (buff != NULL) BUF_MEM_free(buff); 440 if (section != NULL) OPENSSL_free(section); 441 if (line != NULL) *line=eline; 442 BIO_snprintf(btmp,sizeof btmp,"%ld",eline); 443 ERR_add_error_data(2,"line ",btmp); 444 if ((h != conf->data) && (conf->data != NULL)) 445 { 446 CONF_free(conf->data); 447 conf->data=NULL; 448 } 449 if (v != NULL) 450 { 451 if (v->name != NULL) OPENSSL_free(v->name); 452 if (v->value != NULL) OPENSSL_free(v->value); 453 if (v != NULL) OPENSSL_free(v); 454 } 455 return(0); 456 } 457 458 static void clear_comments(CONF *conf, char *p) 459 { 460 for (;;) 461 { 462 if (IS_FCOMMENT(conf,*p)) 463 { 464 *p='\0'; 465 return; 466 } 467 if (!IS_WS(conf,*p)) 468 { 469 break; 470 } 471 p++; 472 } 473 474 for (;;) 475 { 476 if (IS_COMMENT(conf,*p)) 477 { 478 *p='\0'; 479 return; 480 } 481 if (IS_DQUOTE(conf,*p)) 482 { 483 p=scan_dquote(conf, p); 484 continue; 485 } 486 if (IS_QUOTE(conf,*p)) 487 { 488 p=scan_quote(conf, p); 489 continue; 490 } 491 if (IS_ESC(conf,*p)) 492 { 493 p=scan_esc(conf,p); 494 continue; 495 } 496 if (IS_EOF(conf,*p)) 497 return; 498 else 499 p++; 500 } 501 } 502 503 static int str_copy(CONF *conf, char *section, char **pto, char *from) 504 { 505 int q,r,rr=0,to=0,len=0; 506 char *s,*e,*rp,*p,*rrp,*np,*cp,v; 507 BUF_MEM *buf; 508 509 if ((buf=BUF_MEM_new()) == NULL) return(0); 510 511 len=strlen(from)+1; 512 if (!BUF_MEM_grow(buf,len)) goto err; 513 514 for (;;) 515 { 516 if (IS_QUOTE(conf,*from)) 517 { 518 q= *from; 519 from++; 520 while (!IS_EOF(conf,*from) && (*from != q)) 521 { 522 if (IS_ESC(conf,*from)) 523 { 524 from++; 525 if (IS_EOF(conf,*from)) break; 526 } 527 buf->data[to++]= *(from++); 528 } 529 if (*from == q) from++; 530 } 531 else if (IS_DQUOTE(conf,*from)) 532 { 533 q= *from; 534 from++; 535 while (!IS_EOF(conf,*from)) 536 { 537 if (*from == q) 538 { 539 if (*(from+1) == q) 540 { 541 from++; 542 } 543 else 544 { 545 break; 546 } 547 } 548 buf->data[to++]= *(from++); 549 } 550 if (*from == q) from++; 551 } 552 else if (IS_ESC(conf,*from)) 553 { 554 from++; 555 v= *(from++); 556 if (IS_EOF(conf,v)) break; 557 else if (v == 'r') v='\r'; 558 else if (v == 'n') v='\n'; 559 else if (v == 'b') v='\b'; 560 else if (v == 't') v='\t'; 561 buf->data[to++]= v; 562 } 563 else if (IS_EOF(conf,*from)) 564 break; 565 else if (*from == '$') 566 { 567 /* try to expand it */ 568 rrp=NULL; 569 s= &(from[1]); 570 if (*s == '{') 571 q='}'; 572 else if (*s == '(') 573 q=')'; 574 else q=0; 575 576 if (q) s++; 577 cp=section; 578 e=np=s; 579 while (IS_ALPHA_NUMERIC(conf,*e)) 580 e++; 581 if ((e[0] == ':') && (e[1] == ':')) 582 { 583 cp=np; 584 rrp=e; 585 rr= *e; 586 *rrp='\0'; 587 e+=2; 588 np=e; 589 while (IS_ALPHA_NUMERIC(conf,*e)) 590 e++; 591 } 592 r= *e; 593 *e='\0'; 594 rp=e; 595 if (q) 596 { 597 if (r != q) 598 { 599 CONFerr(CONF_F_STR_COPY,CONF_R_NO_CLOSE_BRACE); 600 goto err; 601 } 602 e++; 603 } 604 /* So at this point we have 605 * np which is the start of the name string which is 606 * '\0' terminated. 607 * cp which is the start of the section string which is 608 * '\0' terminated. 609 * e is the 'next point after'. 610 * r and rr are the chars replaced by the '\0' 611 * rp and rrp is where 'r' and 'rr' came from. 612 */ 613 p=_CONF_get_string(conf,cp,np); 614 if (rrp != NULL) *rrp=rr; 615 *rp=r; 616 if (p == NULL) 617 { 618 CONFerr(CONF_F_STR_COPY,CONF_R_VARIABLE_HAS_NO_VALUE); 619 goto err; 620 } 621 BUF_MEM_grow_clean(buf,(strlen(p)+buf->length-(e-from))); 622 while (*p) 623 buf->data[to++]= *(p++); 624 625 /* Since we change the pointer 'from', we also have 626 to change the perceived length of the string it 627 points at. /RL */ 628 len -= e-from; 629 from=e; 630 631 /* In case there were no braces or parenthesis around 632 the variable reference, we have to put back the 633 character that was replaced with a '\0'. /RL */ 634 *rp = r; 635 } 636 else 637 buf->data[to++]= *(from++); 638 } 639 buf->data[to]='\0'; 640 if (*pto != NULL) OPENSSL_free(*pto); 641 *pto=buf->data; 642 OPENSSL_free(buf); 643 return(1); 644 err: 645 if (buf != NULL) BUF_MEM_free(buf); 646 return(0); 647 } 648 649 static char *eat_ws(CONF *conf, char *p) 650 { 651 while (IS_WS(conf,*p) && (!IS_EOF(conf,*p))) 652 p++; 653 return(p); 654 } 655 656 static char *eat_alpha_numeric(CONF *conf, char *p) 657 { 658 for (;;) 659 { 660 if (IS_ESC(conf,*p)) 661 { 662 p=scan_esc(conf,p); 663 continue; 664 } 665 if (!IS_ALPHA_NUMERIC_PUNCT(conf,*p)) 666 return(p); 667 p++; 668 } 669 } 670 671 static char *scan_quote(CONF *conf, char *p) 672 { 673 int q= *p; 674 675 p++; 676 while (!(IS_EOF(conf,*p)) && (*p != q)) 677 { 678 if (IS_ESC(conf,*p)) 679 { 680 p++; 681 if (IS_EOF(conf,*p)) return(p); 682 } 683 p++; 684 } 685 if (*p == q) p++; 686 return(p); 687 } 688 689 690 static char *scan_dquote(CONF *conf, char *p) 691 { 692 int q= *p; 693 694 p++; 695 while (!(IS_EOF(conf,*p))) 696 { 697 if (*p == q) 698 { 699 if (*(p+1) == q) 700 { 701 p++; 702 } 703 else 704 { 705 break; 706 } 707 } 708 p++; 709 } 710 if (*p == q) p++; 711 return(p); 712 } 713 714 static void dump_value_doall_arg(CONF_VALUE *a, BIO *out) 715 { 716 if (a->name) 717 BIO_printf(out, "[%s] %s=%s\n", a->section, a->name, a->value); 718 else 719 BIO_printf(out, "[[%s]]\n", a->section); 720 } 721 722 static IMPLEMENT_LHASH_DOALL_ARG_FN(dump_value, CONF_VALUE, BIO) 723 724 static int def_dump(const CONF *conf, BIO *out) 725 { 726 lh_CONF_VALUE_doall_arg(conf->data, LHASH_DOALL_ARG_FN(dump_value), 727 BIO, out); 728 return 1; 729 } 730 731 static int def_is_number(const CONF *conf, char c) 732 { 733 return IS_NUMBER(conf,c); 734 } 735 736 static int def_to_int(const CONF *conf, char c) 737 { 738 return c - '0'; 739 } 740 741
