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,n; 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 STACK_OF(CONF_VALUE) *section_sk=NULL,*ts; 223 char *start,*psection,*pname; 224 void *h = (void *)(conf->data); 225 226 if ((buff=BUF_MEM_new()) == NULL) 227 { 228 CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_BUF_LIB); 229 goto err; 230 } 231 232 section=(char *)OPENSSL_malloc(10); 233 if (section == NULL) 234 { 235 CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_MALLOC_FAILURE); 236 goto err; 237 } 238 BUF_strlcpy(section,"default",10); 239 240 if (_CONF_new_data(conf) == 0) 241 { 242 CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_MALLOC_FAILURE); 243 goto err; 244 } 245 246 sv=_CONF_new_section(conf,section); 247 if (sv == NULL) 248 { 249 CONFerr(CONF_F_DEF_LOAD_BIO, 250 CONF_R_UNABLE_TO_CREATE_NEW_SECTION); 251 goto err; 252 } 253 section_sk=(STACK_OF(CONF_VALUE) *)sv->value; 254 255 bufnum=0; 256 again=0; 257 for (;;) 258 { 259 if (!BUF_MEM_grow(buff,bufnum+CONFBUFSIZE)) 260 { 261 CONFerr(CONF_F_DEF_LOAD_BIO,ERR_R_BUF_LIB); 262 goto err; 263 } 264 p= &(buff->data[bufnum]); 265 *p='\0'; 266 BIO_gets(in, p, CONFBUFSIZE-1); 267 p[CONFBUFSIZE-1]='\0'; 268 ii=i=strlen(p); 269 if (i == 0 && !again) break; 270 again=0; 271 while (i > 0) 272 { 273 if ((p[i-1] != '\r') && (p[i-1] != '\n')) 274 break; 275 else 276 i--; 277 } 278 /* we removed some trailing stuff so there is a new 279 * line on the end. */ 280 if (ii && i == ii) 281 again=1; /* long line */ 282 else 283 { 284 p[i]='\0'; 285 eline++; /* another input line */ 286 } 287 288 /* we now have a line with trailing \r\n removed */ 289 290 /* i is the number of bytes */ 291 bufnum+=i; 292 293 v=NULL; 294 /* check for line continuation */ 295 if (bufnum >= 1) 296 { 297 /* If we have bytes and the last char '\\' and 298 * second last char is not '\\' */ 299 p= &(buff->data[bufnum-1]); 300 if (IS_ESC(conf,p[0]) && 301 ((bufnum <= 1) || !IS_ESC(conf,p[-1]))) 302 { 303 bufnum--; 304 again=1; 305 } 306 } 307 if (again) continue; 308 bufnum=0; 309 buf=buff->data; 310 311 clear_comments(conf, buf); 312 n=strlen(buf); 313 s=eat_ws(conf, buf); 314 if (IS_EOF(conf,*s)) continue; /* blank line */ 315 if (*s == '[') 316 { 317 char *ss; 318 319 s++; 320 start=eat_ws(conf, s); 321 ss=start; 322 again: 323 end=eat_alpha_numeric(conf, ss); 324 p=eat_ws(conf, end); 325 if (*p != ']') 326 { 327 if (*p != '\0') 328 { 329 ss=p; 330 goto again; 331 } 332 CONFerr(CONF_F_DEF_LOAD_BIO, 333 CONF_R_MISSING_CLOSE_SQUARE_BRACKET); 334 goto err; 335 } 336 *end='\0'; 337 if (!str_copy(conf,NULL,§ion,start)) goto err; 338 if ((sv=_CONF_get_section(conf,section)) == NULL) 339 sv=_CONF_new_section(conf,section); 340 if (sv == NULL) 341 { 342 CONFerr(CONF_F_DEF_LOAD_BIO, 343 CONF_R_UNABLE_TO_CREATE_NEW_SECTION); 344 goto err; 345 } 346 section_sk=(STACK_OF(CONF_VALUE) *)sv->value; 347 continue; 348 } 349 else 350 { 351 pname=s; 352 psection=NULL; 353 end=eat_alpha_numeric(conf, s); 354 if ((end[0] == ':') && (end[1] == ':')) 355 { 356 *end='\0'; 357 end+=2; 358 psection=pname; 359 pname=end; 360 end=eat_alpha_numeric(conf, end); 361 } 362 p=eat_ws(conf, end); 363 if (*p != '=') 364 { 365 CONFerr(CONF_F_DEF_LOAD_BIO, 366 CONF_R_MISSING_EQUAL_SIGN); 367 goto err; 368 } 369 *end='\0'; 370 p++; 371 start=eat_ws(conf, p); 372 while (!IS_EOF(conf,*p)) 373 p++; 374 p--; 375 while ((p != start) && (IS_WS(conf,*p))) 376 p--; 377 p++; 378 *p='\0'; 379 380 if (!(v=(CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE)))) 381 { 382 CONFerr(CONF_F_DEF_LOAD_BIO, 383 ERR_R_MALLOC_FAILURE); 384 goto err; 385 } 386 if (psection == NULL) psection=section; 387 v->name=(char *)OPENSSL_malloc(strlen(pname)+1); 388 v->value=NULL; 389 if (v->name == NULL) 390 { 391 CONFerr(CONF_F_DEF_LOAD_BIO, 392 ERR_R_MALLOC_FAILURE); 393 goto err; 394 } 395 BUF_strlcpy(v->name,pname,strlen(pname)+1); 396 if (!str_copy(conf,psection,&(v->value),start)) goto err; 397 398 if (strcmp(psection,section) != 0) 399 { 400 if ((tv=_CONF_get_section(conf,psection)) 401 == NULL) 402 tv=_CONF_new_section(conf,psection); 403 if (tv == NULL) 404 { 405 CONFerr(CONF_F_DEF_LOAD_BIO, 406 CONF_R_UNABLE_TO_CREATE_NEW_SECTION); 407 goto err; 408 } 409 ts=(STACK_OF(CONF_VALUE) *)tv->value; 410 } 411 else 412 { 413 tv=sv; 414 ts=section_sk; 415 } 416 #if 1 417 if (_CONF_add_string(conf, tv, v) == 0) 418 { 419 CONFerr(CONF_F_DEF_LOAD_BIO, 420 ERR_R_MALLOC_FAILURE); 421 goto err; 422 } 423 #else 424 v->section=tv->section; 425 if (!sk_CONF_VALUE_push(ts,v)) 426 { 427 CONFerr(CONF_F_DEF_LOAD_BIO, 428 ERR_R_MALLOC_FAILURE); 429 goto err; 430 } 431 vv=(CONF_VALUE *)lh_insert(conf->data,v); 432 if (vv != NULL) 433 { 434 sk_CONF_VALUE_delete_ptr(ts,vv); 435 OPENSSL_free(vv->name); 436 OPENSSL_free(vv->value); 437 OPENSSL_free(vv); 438 } 439 #endif 440 v=NULL; 441 } 442 } 443 if (buff != NULL) BUF_MEM_free(buff); 444 if (section != NULL) OPENSSL_free(section); 445 return(1); 446 err: 447 if (buff != NULL) BUF_MEM_free(buff); 448 if (section != NULL) OPENSSL_free(section); 449 if (line != NULL) *line=eline; 450 BIO_snprintf(btmp,sizeof btmp,"%ld",eline); 451 ERR_add_error_data(2,"line ",btmp); 452 if ((h != conf->data) && (conf->data != NULL)) 453 { 454 CONF_free(conf->data); 455 conf->data=NULL; 456 } 457 if (v != NULL) 458 { 459 if (v->name != NULL) OPENSSL_free(v->name); 460 if (v->value != NULL) OPENSSL_free(v->value); 461 if (v != NULL) OPENSSL_free(v); 462 } 463 return(0); 464 } 465 466 static void clear_comments(CONF *conf, char *p) 467 { 468 char *to; 469 470 to=p; 471 for (;;) 472 { 473 if (IS_FCOMMENT(conf,*p)) 474 { 475 *p='\0'; 476 return; 477 } 478 if (!IS_WS(conf,*p)) 479 { 480 break; 481 } 482 p++; 483 } 484 485 for (;;) 486 { 487 if (IS_COMMENT(conf,*p)) 488 { 489 *p='\0'; 490 return; 491 } 492 if (IS_DQUOTE(conf,*p)) 493 { 494 p=scan_dquote(conf, p); 495 continue; 496 } 497 if (IS_QUOTE(conf,*p)) 498 { 499 p=scan_quote(conf, p); 500 continue; 501 } 502 if (IS_ESC(conf,*p)) 503 { 504 p=scan_esc(conf,p); 505 continue; 506 } 507 if (IS_EOF(conf,*p)) 508 return; 509 else 510 p++; 511 } 512 } 513 514 static int str_copy(CONF *conf, char *section, char **pto, char *from) 515 { 516 int q,r,rr=0,to=0,len=0; 517 char *s,*e,*rp,*p,*rrp,*np,*cp,v; 518 BUF_MEM *buf; 519 520 if ((buf=BUF_MEM_new()) == NULL) return(0); 521 522 len=strlen(from)+1; 523 if (!BUF_MEM_grow(buf,len)) goto err; 524 525 for (;;) 526 { 527 if (IS_QUOTE(conf,*from)) 528 { 529 q= *from; 530 from++; 531 while (!IS_EOF(conf,*from) && (*from != q)) 532 { 533 if (IS_ESC(conf,*from)) 534 { 535 from++; 536 if (IS_EOF(conf,*from)) break; 537 } 538 buf->data[to++]= *(from++); 539 } 540 if (*from == q) from++; 541 } 542 else if (IS_DQUOTE(conf,*from)) 543 { 544 q= *from; 545 from++; 546 while (!IS_EOF(conf,*from)) 547 { 548 if (*from == q) 549 { 550 if (*(from+1) == q) 551 { 552 from++; 553 } 554 else 555 { 556 break; 557 } 558 } 559 buf->data[to++]= *(from++); 560 } 561 if (*from == q) from++; 562 } 563 else if (IS_ESC(conf,*from)) 564 { 565 from++; 566 v= *(from++); 567 if (IS_EOF(conf,v)) break; 568 else if (v == 'r') v='\r'; 569 else if (v == 'n') v='\n'; 570 else if (v == 'b') v='\b'; 571 else if (v == 't') v='\t'; 572 buf->data[to++]= v; 573 } 574 else if (IS_EOF(conf,*from)) 575 break; 576 else if (*from == '$') 577 { 578 /* try to expand it */ 579 rrp=NULL; 580 s= &(from[1]); 581 if (*s == '{') 582 q='}'; 583 else if (*s == '(') 584 q=')'; 585 else q=0; 586 587 if (q) s++; 588 cp=section; 589 e=np=s; 590 while (IS_ALPHA_NUMERIC(conf,*e)) 591 e++; 592 if ((e[0] == ':') && (e[1] == ':')) 593 { 594 cp=np; 595 rrp=e; 596 rr= *e; 597 *rrp='\0'; 598 e+=2; 599 np=e; 600 while (IS_ALPHA_NUMERIC(conf,*e)) 601 e++; 602 } 603 r= *e; 604 *e='\0'; 605 rp=e; 606 if (q) 607 { 608 if (r != q) 609 { 610 CONFerr(CONF_F_STR_COPY,CONF_R_NO_CLOSE_BRACE); 611 goto err; 612 } 613 e++; 614 } 615 /* So at this point we have 616 * np which is the start of the name string which is 617 * '\0' terminated. 618 * cp which is the start of the section string which is 619 * '\0' terminated. 620 * e is the 'next point after'. 621 * r and rr are the chars replaced by the '\0' 622 * rp and rrp is where 'r' and 'rr' came from. 623 */ 624 p=_CONF_get_string(conf,cp,np); 625 if (rrp != NULL) *rrp=rr; 626 *rp=r; 627 if (p == NULL) 628 { 629 CONFerr(CONF_F_STR_COPY,CONF_R_VARIABLE_HAS_NO_VALUE); 630 goto err; 631 } 632 BUF_MEM_grow_clean(buf,(strlen(p)+buf->length-(e-from))); 633 while (*p) 634 buf->data[to++]= *(p++); 635 636 /* Since we change the pointer 'from', we also have 637 to change the perceived length of the string it 638 points at. /RL */ 639 len -= e-from; 640 from=e; 641 642 /* In case there were no braces or parenthesis around 643 the variable reference, we have to put back the 644 character that was replaced with a '\0'. /RL */ 645 *rp = r; 646 } 647 else 648 buf->data[to++]= *(from++); 649 } 650 buf->data[to]='\0'; 651 if (*pto != NULL) OPENSSL_free(*pto); 652 *pto=buf->data; 653 OPENSSL_free(buf); 654 return(1); 655 err: 656 if (buf != NULL) BUF_MEM_free(buf); 657 return(0); 658 } 659 660 static char *eat_ws(CONF *conf, char *p) 661 { 662 while (IS_WS(conf,*p) && (!IS_EOF(conf,*p))) 663 p++; 664 return(p); 665 } 666 667 static char *eat_alpha_numeric(CONF *conf, char *p) 668 { 669 for (;;) 670 { 671 if (IS_ESC(conf,*p)) 672 { 673 p=scan_esc(conf,p); 674 continue; 675 } 676 if (!IS_ALPHA_NUMERIC_PUNCT(conf,*p)) 677 return(p); 678 p++; 679 } 680 } 681 682 static char *scan_quote(CONF *conf, char *p) 683 { 684 int q= *p; 685 686 p++; 687 while (!(IS_EOF(conf,*p)) && (*p != q)) 688 { 689 if (IS_ESC(conf,*p)) 690 { 691 p++; 692 if (IS_EOF(conf,*p)) return(p); 693 } 694 p++; 695 } 696 if (*p == q) p++; 697 return(p); 698 } 699 700 701 static char *scan_dquote(CONF *conf, char *p) 702 { 703 int q= *p; 704 705 p++; 706 while (!(IS_EOF(conf,*p))) 707 { 708 if (*p == q) 709 { 710 if (*(p+1) == q) 711 { 712 p++; 713 } 714 else 715 { 716 break; 717 } 718 } 719 p++; 720 } 721 if (*p == q) p++; 722 return(p); 723 } 724 725 static void dump_value_doall_arg(CONF_VALUE *a, BIO *out) 726 { 727 if (a->name) 728 BIO_printf(out, "[%s] %s=%s\n", a->section, a->name, a->value); 729 else 730 BIO_printf(out, "[[%s]]\n", a->section); 731 } 732 733 static IMPLEMENT_LHASH_DOALL_ARG_FN(dump_value, CONF_VALUE, BIO) 734 735 static int def_dump(const CONF *conf, BIO *out) 736 { 737 lh_CONF_VALUE_doall_arg(conf->data, LHASH_DOALL_ARG_FN(dump_value), 738 BIO, out); 739 return 1; 740 } 741 742 static int def_is_number(const CONF *conf, char c) 743 { 744 return IS_NUMBER(conf,c); 745 } 746 747 static int def_to_int(const CONF *conf, char c) 748 { 749 return c - '0'; 750 } 751 752
