crypto/conf/conf_def.c

   1 /* crypto/conf/conf.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 /* Part of the code in here was originally in conf.c, which is now removed */
  60
  61 #include <stdio.h>
  62 #include <openssl/stack.h>
  63 #include <openssl/lhash.h>
  64 #include <openssl/conf.h>
  65 #include <openssl/conf_api.h>
  66 #include "conf_def.h"
  67 #include <openssl/buffer.h>
  68 #include <openssl/err.h>
  69
  70 static char *eat_ws(CONF *conf, char *p);
  71 static char *eat_alpha_numeric(CONF *conf, char *p);
  72 static void clear_comments(CONF *conf, char *p);
  73 static int str_copy(CONF *conf,char *section,char **to, char *from);
  74 static char *scan_quote(CONF *conf, char *p);
  75 static char *scan_dquote(CONF *conf, char *p);
  76 #define scan_esc(p)     (((IS_EOF((conf),(p)[1]))?(p+=1):(p+=2)))
  77
  78 static CONF *def_create(CONF_METHOD *meth);
  79 static int def_init_default(CONF *conf);
  80 static int def_init_WIN32(CONF *conf);
  81 static int def_destroy(CONF *conf);
  82 static int def_destroy_data(CONF *conf);
  83 static int def_load(CONF *conf, BIO *bp, long *eline);
  84 static int def_dump(CONF *conf, BIO *bp);
  85 static int def_is_number(CONF *conf, char c);
  86 static int def_to_int(CONF *conf, char c);
  87
  88 const char *CONF_def_version="CONF_def" OPENSSL_VERSION_PTEXT;
  89
  90 static CONF_METHOD default_method = {
  91         "OpenSSL default",
  92         def_create,
  93         def_init_default,
  94         def_destroy,
  95         def_destroy_data,
  96         def_load,
  97         def_dump,
  98         def_is_number,
  99         def_to_int
 100         };
 101
 102 static CONF_METHOD WIN32_method = {
 103         "WIN32",
 104         def_create,
 105         def_init_WIN32,
 106         def_destroy,
 107         def_destroy_data,
 108         def_load,
 109         def_dump,
 110         def_is_number,
 111         def_to_int
 112         };
 113
 114 CONF_METHOD *NCONF_default()
 115         {
 116         return &default_method;
 117         }
 118 CONF_METHOD *NCONF_WIN32()
 119         {
 120         return &WIN32_method;
 121         }
 122
 123 static CONF *def_create(CONF_METHOD *meth)
 124         {
 125         CONF *ret;
 126
 127         ret = (CONF *)OPENSSL_malloc(sizeof(CONF) + sizeof(unsigned short *));
 128         if (ret)
 129                 if (meth->init(ret) == 0)
 130                         {
 131                         OPENSSL_free(ret);
 132                         ret = NULL;
 133                         }
 134         return ret;
 135         }
 136
 137 static int def_init_default(CONF *conf)
 138         {
 139         if (conf == NULL)
 140                 return 0;
 141
 142         conf->meth = &default_method;
 143         conf->meth_data = (void *)CONF_type_default;
 144         conf->data = NULL;
 145
 146         return 1;
 147         }
 148
 149 static int def_init_WIN32(CONF *conf)
 150         {
 151         if (conf == NULL)
 152                 return 0;
 153
 154         conf->meth = &WIN32_method;
 155         conf->meth_data = (void *)CONF_type_win32;
 156         conf->data = NULL;
 157
 158         return 1;
 159         }
 160
 161 static int def_destroy(CONF *conf)
 162         {
 163         if (def_destroy_data(conf))
 164                 {
 165                 OPENSSL_free(conf);
 166                 return 1;
 167                 }
 168         return 0;
 169         }
 170
 171 static int def_destroy_data(CONF *conf)
 172         {
 173         if (conf == NULL)
 174                 return 0;
 175         _CONF_free_data(conf);
 176         return 1;
 177         }
 178
 179 static int def_load(CONF *conf, BIO *in, long *line)
 180         {
 181 #define BUFSIZE 512
 182         char btmp[16];
 183         int bufnum=0,i,ii;
 184         BUF_MEM *buff=NULL;
 185         char *s,*p,*end;
 186         int again,n;
 187         long eline=0;
 188         CONF_VALUE *v=NULL,*tv;
 189         CONF_VALUE *sv=NULL;
 190         char *section=NULL,*buf;
 191         STACK_OF(CONF_VALUE) *section_sk=NULL,*ts;
 192         char *start,*psection,*pname;
 193         void *h = (void *)(conf->data);
 194
 195         if ((buff=BUF_MEM_new()) == NULL)
 196                 {
 197                 CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_BUF_LIB);
 198                 goto err;
 199                 }
 200
 201         section=(char *)OPENSSL_malloc(10);
 202         if (section == NULL)
 203                 {
 204                 CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_MALLOC_FAILURE);
 205                 goto err;
 206                 }
 207         strcpy(section,"default");
 208
 209         if (_CONF_new_data(conf) == 0)
 210                 {
 211                 CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_MALLOC_FAILURE);
 212                 goto err;
 213                 }
 214
 215         sv=_CONF_new_section(conf,section);
 216         if (sv == NULL)
 217                 {
 218                 CONFerr(CONF_F_CONF_LOAD_BIO,
 219                                         CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
 220                 goto err;
 221                 }
 222         section_sk=(STACK_OF(CONF_VALUE) *)sv->value;
 223
 224         bufnum=0;
 225         for (;;)
 226                 {
 227                 again=0;
 228                 if (!BUF_MEM_grow(buff,bufnum+BUFSIZE))
 229                         {
 230                         CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_BUF_LIB);
 231                         goto err;
 232                         }
 233                 p= &(buff->data[bufnum]);
 234                 *p='\0';
 235                 BIO_gets(in, p, BUFSIZE-1);
 236                 p[BUFSIZE-1]='\0';
 237                 ii=i=strlen(p);
 238                 if (i == 0) break;
 239                 while (i > 0)
 240                         {
 241                         if ((p[i-1] != '\r') && (p[i-1] != '\n'))
 242                                 break;
 243                         else
 244                                 i--;
 245                         }
 246                 /* we removed some trailing stuff so there is a new
 247                  * line on the end. */
 248                 if (i == ii)
 249                         again=1; /* long line */
 250                 else
 251                         {
 252                         p[i]='\0';
 253                         eline++; /* another input line */
 254                         }
 255
 256                 /* we now have a line with trailing \r\n removed */
 257
 258                 /* i is the number of bytes */
 259                 bufnum+=i;
 260
 261                 v=NULL;
 262                 /* check for line continuation */
 263                 if (bufnum >= 1)
 264                         {
 265                         /* If we have bytes and the last char '\\' and
 266                          * second last char is not '\\' */
 267                         p= &(buff->data[bufnum-1]);
 268                         if (IS_ESC(conf,p[0]) &&
 269                                 ((bufnum <= 1) || !IS_ESC(conf,p[-1])))
 270                                 {
 271                                 bufnum--;
 272                                 again=1;
 273                                 }
 274                         }
 275                 if (again) continue;
 276                 bufnum=0;
 277                 buf=buff->data;
 278
 279                 clear_comments(conf, buf);
 280                 n=strlen(buf);
 281                 s=eat_ws(conf, buf);
 282                 if (IS_EOF(conf,*s)) continue; /* blank line */
 283                 if (*s == '[')
 284                         {
 285                         char *ss;
 286
 287                         s++;
 288                         start=eat_ws(conf, s);
 289                         ss=start;
 290 again:
 291                         end=eat_alpha_numeric(conf, ss);
 292                         p=eat_ws(conf, end);
 293                         if (*p != ']')
 294                                 {
 295                                 if (*p != '\0')
 296                                         {
 297                                         ss=p;
 298                                         goto again;
 299                                         }
 300                                 CONFerr(CONF_F_CONF_LOAD_BIO,
 301                                         CONF_R_MISSING_CLOSE_SQUARE_BRACKET);
 302                                 goto err;
 303                                 }
 304                         *end='\0';
 305                         if (!str_copy(conf,NULL,&section,start)) goto err;
 306                         if ((sv=_CONF_get_section(conf,section)) == NULL)
 307                                 sv=_CONF_new_section(conf,section);
 308                         if (sv == NULL)
 309                                 {
 310                                 CONFerr(CONF_F_CONF_LOAD_BIO,
 311                                         CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
 312                                 goto err;
 313                                 }
 314                         section_sk=(STACK_OF(CONF_VALUE) *)sv->value;
 315                         continue;
 316                         }
 317                 else
 318                         {
 319                         pname=s;
 320                         psection=NULL;
 321                         end=eat_alpha_numeric(conf, s);
 322                         if ((end[0] == ':') && (end[1] == ':'))
 323                                 {
 324                                 *end='\0';
 325                                 end+=2;
 326                                 psection=pname;
 327                                 pname=end;
 328                                 end=eat_alpha_numeric(conf, end);
 329                                 }
 330                         p=eat_ws(conf, end);
 331                         if (*p != '=')
 332                                 {
 333                                 CONFerr(CONF_F_CONF_LOAD_BIO,
 334                                                 CONF_R_MISSING_EQUAL_SIGN);
 335                                 goto err;
 336                                 }
 337                         *end='\0';
 338                         p++;
 339                         start=eat_ws(conf, p);
 340                         while (!IS_EOF(conf,*p))
 341                                 p++;
 342                         p--;
 343                         while ((p != start) && (IS_WS(conf,*p)))
 344                                 p--;
 345                         p++;
 346                         *p='\0';
 347
 348                         if (!(v=(CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE))))
 349                                 {
 350                                 CONFerr(CONF_F_CONF_LOAD_BIO,
 351                                                         ERR_R_MALLOC_FAILURE);
 352                                 goto err;
 353                                 }
 354                         if (psection == NULL) psection=section;
 355                         v->name=(char *)OPENSSL_malloc(strlen(pname)+1);
 356                         v->value=NULL;
 357                         if (v->name == NULL)
 358                                 {
 359                                 CONFerr(CONF_F_CONF_LOAD_BIO,
 360                                                         ERR_R_MALLOC_FAILURE);
 361                                 goto err;
 362                                 }
 363                         strcpy(v->name,pname);
 364                         if (!str_copy(conf,psection,&(v->value),start)) goto err;
 365
 366                         if (strcmp(psection,section) != 0)
 367                                 {
 368                                 if ((tv=_CONF_get_section(conf,psection))
 369                                         == NULL)
 370                                         tv=_CONF_new_section(conf,psection);
 371                                 if (tv == NULL)
 372                                         {
 373                                         CONFerr(CONF_F_CONF_LOAD_BIO,
 374                                            CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
 375                                         goto err;
 376                                         }
 377                                 ts=(STACK_OF(CONF_VALUE) *)tv->value;
 378                                 }
 379                         else
 380                                 {
 381                                 tv=sv;
 382                                 ts=section_sk;
 383                                 }
 384 #if 1
 385                         if (_CONF_add_string(conf, tv, v) == 0)
 386                                 {
 387                                 CONFerr(CONF_F_CONF_LOAD_BIO,
 388                                                         ERR_R_MALLOC_FAILURE);
 389                                 goto err;
 390                                 }
 391 #else
 392                         v->section=tv->section;
 393                         if (!sk_CONF_VALUE_push(ts,v))
 394                                 {
 395                                 CONFerr(CONF_F_CONF_LOAD_BIO,
 396                                                         ERR_R_MALLOC_FAILURE);
 397                                 goto err;
 398                                 }
 399                         vv=(CONF_VALUE *)lh_insert(conf->data,v);
 400                         if (vv != NULL)
 401                                 {
 402                                 sk_CONF_VALUE_delete_ptr(ts,vv);
 403                                 OPENSSL_free(vv->name);
 404                                 OPENSSL_free(vv->value);
 405                                 OPENSSL_free(vv);
 406                                 }
 407 #endif
 408                         v=NULL;
 409                         }
 410                 }
 411         if (buff != NULL) BUF_MEM_free(buff);
 412         if (section != NULL) OPENSSL_free(section);
 413         return(1);
 414 err:
 415         if (buff != NULL) BUF_MEM_free(buff);
 416         if (section != NULL) OPENSSL_free(section);
 417         if (line != NULL) *line=eline;
 418         sprintf(btmp,"%ld",eline);
 419         ERR_add_error_data(2,"line ",btmp);
 420         if ((h != conf->data) && (conf->data != NULL)) CONF_free(conf->data);
 421         if (v != NULL)
 422                 {
 423                 if (v->name != NULL) OPENSSL_free(v->name);
 424                 if (v->value != NULL) OPENSSL_free(v->value);
 425                 if (v != NULL) OPENSSL_free(v);
 426                 }
 427         return(0);
 428         }
 429
 430 static void clear_comments(CONF *conf, char *p)
 431         {
 432         char *to;
 433
 434         to=p;
 435         for (;;)
 436                 {
 437                 if (IS_FCOMMENT(conf,*p))
 438                         {
 439                         *p='\0';
 440                         return;
 441                         }
 442                 if (!IS_WS(conf,*p))
 443                         {
 444                         break;
 445                         }
 446                 p++;
 447                 }
 448
 449         for (;;)
 450                 {
 451                 if (IS_COMMENT(conf,*p))
 452                         {
 453                         *p='\0';
 454                         return;
 455                         }
 456                 if (IS_DQUOTE(conf,*p))
 457                         {
 458                         p=scan_dquote(conf, p);
 459                         continue;
 460                         }
 461                 if (IS_QUOTE(conf,*p))
 462                         {
 463                         p=scan_quote(conf, p);
 464                         continue;
 465                         }
 466                 if (IS_ESC(conf,*p))
 467                         {
 468                         p=scan_esc(p);
 469                         continue;
 470                         }
 471                 if (IS_EOF(conf,*p))
 472                         return;
 473                 else
 474                         p++;
 475                 }
 476         }
 477
 478 static int 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) return(0);
 485
 486         len=strlen(from)+1;
 487         if (!BUF_MEM_grow(buf,len)) goto err;
 488
 489         for (;;)
 490                 {
 491                 if (IS_QUOTE(conf,*from))
 492                         {
 493                         q= *from;
 494                         from++;
 495                         while (!IS_EOF(conf,*from) && (*from != q))
 496                                 {
 497                                 if (IS_ESC(conf,*from))
 498                                         {
 499                                         from++;
 500                                         if (IS_EOF(conf,*from)) break;
 501                                         }
 502                                 buf->data[to++]= *(from++);
 503                                 }
 504                         if (*from == q) from++;
 505                         }
 506                 else if (IS_DQUOTE(conf,*from))
 507                         {
 508                         q= *from;
 509                         from++;
 510                         while (!IS_EOF(conf,*from))
 511                                 {
 512                                 if (*from == q)
 513                                         {
 514                                         if (*(from+1) == q)
 515                                                 {
 516                                                 from++;
 517                                                 }
 518                                         else
 519                                                 {
 520                                                 break;
 521                                                 }
 522                                         }
 523                                 buf->data[to++]= *(from++);
 524                                 }
 525                         if (*from == q) from++;
 526                         }
 527                 else if (IS_ESC(conf,*from))
 528                         {
 529                         from++;
 530                         v= *(from++);
 531                         if (IS_EOF(conf,v)) break;
 532                         else if (v == 'r') v='\r';
 533                         else if (v == 'n') v='\n';
 534                         else if (v == 'b') v='\b';
 535                         else if (v == 't') v='\t';
 536                         buf->data[to++]= v;
 537                         }
 538                 else if (IS_EOF(conf,*from))
 539                         break;
 540                 else if (*from == '$')
 541                         {
 542                         /* try to expand it */
 543                         rrp=NULL;
 544                         s= &(from[1]);
 545                         if (*s == '{')
 546                                 q='}';
 547                         else if (*s == '(')
 548                                 q=')';
 549                         else q=0;
 550
 551                         if (q) s++;
 552                         cp=section;
 553                         e=np=s;
 554                         while (IS_ALPHA_NUMERIC(conf,*e))
 555                                 e++;
 556                         if ((e[0] == ':') && (e[1] == ':'))
 557                                 {
 558                                 cp=np;
 559                                 rrp=e;
 560                                 rr= *e;
 561                                 *rrp='\0';
 562                                 e+=2;
 563                                 np=e;
 564                                 while (IS_ALPHA_NUMERIC(conf,*e))
 565                                         e++;
 566                                 }
 567                         r= *e;
 568                         *e='\0';
 569                         rp=e;
 570                         if (q)
 571                                 {
 572                                 if (r != q)
 573                                         {
 574                                         CONFerr(CONF_F_STR_COPY,CONF_R_NO_CLOSE_BRACE);
 575                                         goto err;
 576                                         }
 577                                 e++;
 578                                 }
 579                         /* So at this point we have
 580                          * ns which is the start of the name string which is
 581                          *   '\0' terminated.
 582                          * cs which is the start of the section string which is
 583                          *   '\0' terminated.
 584                          * e is the 'next point after'.
 585                          * r and s are the chars replaced by the '\0'
 586                          * rp and sp is where 'r' and 's' came from.
 587                          */
 588                         p=_CONF_get_string(conf,cp,np);
 589                         if (rrp != NULL) *rrp=rr;
 590                         *rp=r;
 591                         if (p == NULL)
 592                                 {
 593                                 CONFerr(CONF_F_STR_COPY,CONF_R_VARIABLE_HAS_NO_VALUE);
 594                                 goto err;
 595                                 }
 596                         BUF_MEM_grow(buf,(strlen(p)+len-(e-from)));
 597                         while (*p)
 598                                 buf->data[to++]= *(p++);
 599                         from=e;
 600                         }
 601                 else
 602                         buf->data[to++]= *(from++);
 603                 }
 604         buf->data[to]='\0';
 605         if (*pto != NULL) OPENSSL_free(*pto);
 606         *pto=buf->data;
 607         OPENSSL_free(buf);
 608         return(1);
 609 err:
 610         if (buf != NULL) BUF_MEM_free(buf);
 611         return(0);
 612         }
 613
 614 static char *eat_ws(CONF *conf, char *p)
 615         {
 616         while (IS_WS(conf,*p) && (!IS_EOF(conf,*p)))
 617                 p++;
 618         return(p);
 619         }
 620
 621 static char *eat_alpha_numeric(CONF *conf, char *p)
 622         {
 623         for (;;)
 624                 {
 625                 if (IS_ESC(conf,*p))
 626                         {
 627                         p=scan_esc(p);
 628                         continue;
 629                         }
 630                 if (!IS_ALPHA_NUMERIC_PUNCT(conf,*p))
 631                         return(p);
 632                 p++;
 633                 }
 634         }
 635
 636 static char *scan_quote(CONF *conf, char *p)
 637         {
 638         int q= *p;
 639
 640         p++;
 641         while (!(IS_EOF(conf,*p)) && (*p != q))
 642                 {
 643                 if (IS_ESC(conf,*p))
 644                         {
 645                         p++;
 646                         if (IS_EOF(conf,*p)) return(p);
 647                         }
 648                 p++;
 649                 }
 650         if (*p == q) p++;
 651         return(p);
 652         }
 653
 654
 655 static char *scan_dquote(CONF *conf, char *p)
 656         {
 657         int q= *p;
 658
 659         p++;
 660         while (!(IS_EOF(conf,*p)))
 661                 {
 662                 if (*p == q)
 663                         {
 664                         if (*(p+1) == q)
 665                                 {
 666                                 p++;
 667                                 }
 668                         else
 669                                 {
 670                                 break;
 671                                 }
 672                         }
 673                 p++;
 674                 }
 675         if (*p == q) p++;
 676         return(p);
 677         }
 678
 679 static void dump_value(CONF_VALUE *a, BIO *out)
 680         {
 681         if (a->name)
 682                 BIO_printf(out, "[%s] %s=%s\n", a->section, a->name, a->value);
 683         else
 684                 BIO_printf(out, "[[%s]]\n", a->section);
 685         }
 686
 687 static int def_dump(CONF *conf, BIO *out)
 688         {
 689         lh_doall_arg(conf->data, (void (*)())dump_value, out);
 690         return 1;
 691         }
 692
 693 static int def_is_number(CONF *conf, char c)
 694         {
 695         return IS_NUMBER(conf,c);
 696         }
 697
 698 static int def_to_int(CONF *conf, char c)
 699         {
 700         return c - '0';
 701         }
 702