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 <string.h>
  63 #include <openssl/stack.h>
  64 #include <openssl/lhash.h>
  65 #include <openssl/conf.h>
  66 #include <openssl/conf_api.h>
  67 #include "conf_def.h"
  68 #include <openssl/buffer.h>
  69 #include <openssl/err.h>
  70
  71 static char *eat_ws(CONF *conf, char *p);
  72 static char *eat_alpha_numeric(CONF *conf, char *p);
  73 static void clear_comments(CONF *conf, char *p);
  74 static int str_copy(CONF *conf,char *section,char **to, char *from);
  75 static char *scan_quote(CONF *conf, char *p);
  76 static char *scan_dquote(CONF *conf, char *p);
  77 #define scan_esc(conf,p)        (((IS_EOF((conf),(p)[1]))?((p)+1):((p)+2)))
  78
  79 static CONF *def_create(CONF_METHOD *meth);
  80 static int def_init_default(CONF *conf);
  81 static int def_init_WIN32(CONF *conf);
  82 static int def_destroy(CONF *conf);
  83 static int def_destroy_data(CONF *conf);
  84 static int def_load(CONF *conf, BIO *bp, long *eline);
  85 static int def_dump(CONF *conf, BIO *bp);
  86 static int def_is_number(CONF *conf, char c);
  87 static int def_to_int(CONF *conf, char c);
  88
  89 const char *CONF_def_version="CONF_def" OPENSSL_VERSION_PTEXT;
  90
  91 static CONF_METHOD default_method = {
  92         "OpenSSL default",
  93         def_create,
  94         def_init_default,
  95         def_destroy,
  96         def_destroy_data,
  97         def_load,
  98         def_dump,
  99         def_is_number,
 100         def_to_int
 101         };
 102
 103 static CONF_METHOD WIN32_method = {
 104         "WIN32",
 105         def_create,
 106         def_init_WIN32,
 107         def_destroy,
 108         def_destroy_data,
 109         def_load,
 110         def_dump,
 111         def_is_number,
 112         def_to_int
 113         };
 114
 115 CONF_METHOD *NCONF_default()
 116         {
 117         return &default_method;
 118         }
 119 CONF_METHOD *NCONF_WIN32()
 120         {
 121         return &WIN32_method;
 122         }
 123
 124 static CONF *def_create(CONF_METHOD *meth)
 125         {
 126         CONF *ret;
 127
 128         ret = (CONF *)OPENSSL_malloc(sizeof(CONF) + sizeof(unsigned short *));
 129         if (ret)
 130                 if (meth->init(ret) == 0)
 131                         {
 132                         OPENSSL_free(ret);
 133                         ret = NULL;
 134                         }
 135         return ret;
 136         }
 137
 138 static int def_init_default(CONF *conf)
 139         {
 140         if (conf == NULL)
 141                 return 0;
 142
 143         conf->meth = &default_method;
 144         conf->meth_data = (void *)CONF_type_default;
 145         conf->data = NULL;
 146
 147         return 1;
 148         }
 149
 150 static int def_init_WIN32(CONF *conf)
 151         {
 152         if (conf == NULL)
 153                 return 0;
 154
 155         conf->meth = &WIN32_method;
 156         conf->meth_data = (void *)CONF_type_win32;
 157         conf->data = NULL;
 158
 159         return 1;
 160         }
 161
 162 static int def_destroy(CONF *conf)
 163         {
 164         if (def_destroy_data(conf))
 165                 {
 166                 OPENSSL_free(conf);
 167                 return 1;
 168                 }
 169         return 0;
 170         }
 171
 172 static int def_destroy_data(CONF *conf)
 173         {
 174         if (conf == NULL)
 175                 return 0;
 176         _CONF_free_data(conf);
 177         return 1;
 178         }
 179
 180 static int def_load(CONF *conf, BIO *in, long *line)
 181         {
 182 #define BUFSIZE 512
 183         char btmp[16];
 184         int bufnum=0,i,ii;
 185         BUF_MEM *buff=NULL;
 186         char *s,*p,*end;
 187         int again,n;
 188         long eline=0;
 189         CONF_VALUE *v=NULL,*tv;
 190         CONF_VALUE *sv=NULL;
 191         char *section=NULL,*buf;
 192         STACK_OF(CONF_VALUE) *section_sk=NULL,*ts;
 193         char *start,*psection,*pname;
 194         void *h = (void *)(conf->data);
 195
 196         if ((buff=BUF_MEM_new()) == NULL)
 197                 {
 198                 CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_BUF_LIB);
 199                 goto err;
 200                 }
 201
 202         section=(char *)OPENSSL_malloc(10);
 203         if (section == NULL)
 204                 {
 205                 CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_MALLOC_FAILURE);
 206                 goto err;
 207                 }
 208         strcpy(section,"default");
 209
 210         if (_CONF_new_data(conf) == 0)
 211                 {
 212                 CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_MALLOC_FAILURE);
 213                 goto err;
 214                 }
 215
 216         sv=_CONF_new_section(conf,section);
 217         if (sv == NULL)
 218                 {
 219                 CONFerr(CONF_F_CONF_LOAD_BIO,
 220                                         CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
 221                 goto err;
 222                 }
 223         section_sk=(STACK_OF(CONF_VALUE) *)sv->value;
 224
 225         bufnum=0;
 226         for (;;)
 227                 {
 228                 again=0;
 229                 if (!BUF_MEM_grow(buff,bufnum+BUFSIZE))
 230                         {
 231                         CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_BUF_LIB);
 232                         goto err;
 233                         }
 234                 p= &(buff->data[bufnum]);
 235                 *p='\0';
 236                 BIO_gets(in, p, BUFSIZE-1);
 237                 p[BUFSIZE-1]='\0';
 238                 ii=i=strlen(p);
 239                 if (i == 0) break;
 240                 while (i > 0)
 241                         {
 242                         if ((p[i-1] != '\r') && (p[i-1] != '\n'))
 243                                 break;
 244                         else
 245                                 i--;
 246                         }
 247                 /* we removed some trailing stuff so there is a new
 248                  * line on the end. */
 249                 if (i == ii)
 250                         again=1; /* long line */
 251                 else
 252                         {
 253                         p[i]='\0';
 254                         eline++; /* another input line */
 255                         }
 256
 257                 /* we now have a line with trailing \r\n removed */
 258
 259                 /* i is the number of bytes */
 260                 bufnum+=i;
 261
 262                 v=NULL;
 263                 /* check for line continuation */
 264                 if (bufnum >= 1)
 265                         {
 266                         /* If we have bytes and the last char '\\' and
 267                          * second last char is not '\\' */
 268                         p= &(buff->data[bufnum-1]);
 269                         if (IS_ESC(conf,p[0]) &&
 270                                 ((bufnum <= 1) || !IS_ESC(conf,p[-1])))
 271                                 {
 272                                 bufnum--;
 273                                 again=1;
 274                                 }
 275                         }
 276                 if (again) continue;
 277                 bufnum=0;
 278                 buf=buff->data;
 279
 280                 clear_comments(conf, buf);
 281                 n=strlen(buf);
 282                 s=eat_ws(conf, buf);
 283                 if (IS_EOF(conf,*s)) continue; /* blank line */
 284                 if (*s == '[')
 285                         {
 286                         char *ss;
 287
 288                         s++;
 289                         start=eat_ws(conf, s);
 290                         ss=start;
 291 again:
 292                         end=eat_alpha_numeric(conf, ss);
 293                         p=eat_ws(conf, end);
 294                         if (*p != ']')
 295                                 {
 296                                 if (*p != '\0')
 297                                         {
 298                                         ss=p;
 299                                         goto again;
 300                                         }
 301                                 CONFerr(CONF_F_CONF_LOAD_BIO,
 302                                         CONF_R_MISSING_CLOSE_SQUARE_BRACKET);
 303                                 goto err;
 304                                 }
 305                         *end='\0';
 306                         if (!str_copy(conf,NULL,&section,start)) goto err;
 307                         if ((sv=_CONF_get_section(conf,section)) == NULL)
 308                                 sv=_CONF_new_section(conf,section);
 309                         if (sv == NULL)
 310                                 {
 311                                 CONFerr(CONF_F_CONF_LOAD_BIO,
 312                                         CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
 313                                 goto err;
 314                                 }
 315                         section_sk=(STACK_OF(CONF_VALUE) *)sv->value;
 316                         continue;
 317                         }
 318                 else
 319                         {
 320                         pname=s;
 321                         psection=NULL;
 322                         end=eat_alpha_numeric(conf, s);
 323                         if ((end[0] == ':') && (end[1] == ':'))
 324                                 {
 325                                 *end='\0';
 326                                 end+=2;
 327                                 psection=pname;
 328                                 pname=end;
 329                                 end=eat_alpha_numeric(conf, end);
 330                                 }
 331                         p=eat_ws(conf, end);
 332                         if (*p != '=')
 333                                 {
 334                                 CONFerr(CONF_F_CONF_LOAD_BIO,
 335                                                 CONF_R_MISSING_EQUAL_SIGN);
 336                                 goto err;
 337                                 }
 338                         *end='\0';
 339                         p++;
 340                         start=eat_ws(conf, p);
 341                         while (!IS_EOF(conf,*p))
 342                                 p++;
 343                         p--;
 344                         while ((p != start) && (IS_WS(conf,*p)))
 345                                 p--;
 346                         p++;
 347                         *p='\0';
 348
 349                         if (!(v=(CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE))))
 350                                 {
 351                                 CONFerr(CONF_F_CONF_LOAD_BIO,
 352                                                         ERR_R_MALLOC_FAILURE);
 353                                 goto err;
 354                                 }
 355                         if (psection == NULL) psection=section;
 356                         v->name=(char *)OPENSSL_malloc(strlen(pname)+1);
 357                         v->value=NULL;
 358                         if (v->name == NULL)
 359                                 {
 360                                 CONFerr(CONF_F_CONF_LOAD_BIO,
 361                                                         ERR_R_MALLOC_FAILURE);
 362                                 goto err;
 363                                 }
 364                         strcpy(v->name,pname);
 365                         if (!str_copy(conf,psection,&(v->value),start)) goto err;
 366
 367                         if (strcmp(psection,section) != 0)
 368                                 {
 369                                 if ((tv=_CONF_get_section(conf,psection))
 370                                         == NULL)
 371                                         tv=_CONF_new_section(conf,psection);
 372                                 if (tv == NULL)
 373                                         {
 374                                         CONFerr(CONF_F_CONF_LOAD_BIO,
 375                                            CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
 376                                         goto err;
 377                                         }
 378                                 ts=(STACK_OF(CONF_VALUE) *)tv->value;
 379                                 }
 380                         else
 381                                 {
 382                                 tv=sv;
 383                                 ts=section_sk;
 384                                 }
 385 #if 1
 386                         if (_CONF_add_string(conf, tv, v) == 0)
 387                                 {
 388                                 CONFerr(CONF_F_CONF_LOAD_BIO,
 389                                                         ERR_R_MALLOC_FAILURE);
 390                                 goto err;
 391                                 }
 392 #else
 393                         v->section=tv->section;
 394                         if (!sk_CONF_VALUE_push(ts,v))
 395                                 {
 396                                 CONFerr(CONF_F_CONF_LOAD_BIO,
 397                                                         ERR_R_MALLOC_FAILURE);
 398                                 goto err;
 399                                 }
 400                         vv=(CONF_VALUE *)lh_insert(conf->data,v);
 401                         if (vv != NULL)
 402                                 {
 403                                 sk_CONF_VALUE_delete_ptr(ts,vv);
 404                                 OPENSSL_free(vv->name);
 405                                 OPENSSL_free(vv->value);
 406                                 OPENSSL_free(vv);
 407                                 }
 408 #endif
 409                         v=NULL;
 410                         }
 411                 }
 412         if (buff != NULL) BUF_MEM_free(buff);
 413         if (section != NULL) OPENSSL_free(section);
 414         return(1);
 415 err:
 416         if (buff != NULL) BUF_MEM_free(buff);
 417         if (section != NULL) OPENSSL_free(section);
 418         if (line != NULL) *line=eline;
 419         sprintf(btmp,"%ld",eline);
 420         ERR_add_error_data(2,"line ",btmp);
 421         if ((h != conf->data) && (conf->data != NULL)) CONF_free(conf->data);
 422         if (v != NULL)
 423                 {
 424                 if (v->name != NULL) OPENSSL_free(v->name);
 425                 if (v->value != NULL) OPENSSL_free(v->value);
 426                 if (v != NULL) OPENSSL_free(v);
 427                 }
 428         return(0);
 429         }
 430
 431 static void clear_comments(CONF *conf, char *p)
 432         {
 433         char *to;
 434
 435         to=p;
 436         for (;;)
 437                 {
 438                 if (IS_FCOMMENT(conf,*p))
 439                         {
 440                         *p='\0';
 441                         return;
 442                         }
 443                 if (!IS_WS(conf,*p))
 444                         {
 445                         break;
 446                         }
 447                 p++;
 448                 }
 449
 450         for (;;)
 451                 {
 452                 if (IS_COMMENT(conf,*p))
 453                         {
 454                         *p='\0';
 455                         return;
 456                         }
 457                 if (IS_DQUOTE(conf,*p))
 458                         {
 459                         p=scan_dquote(conf, p);
 460                         continue;
 461                         }
 462                 if (IS_QUOTE(conf,*p))
 463                         {
 464                         p=scan_quote(conf, p);
 465                         continue;
 466                         }
 467                 if (IS_ESC(conf,*p))
 468                         {
 469                         p=scan_esc(conf,p);
 470                         continue;
 471                         }
 472                 if (IS_EOF(conf,*p))
 473                         return;
 474                 else
 475                         p++;
 476                 }
 477         }
 478
 479 static int str_copy(CONF *conf, char *section, char **pto, char *from)
 480         {
 481         int q,r,rr=0,to=0,len=0;
 482         char *s,*e,*rp,*p,*rrp,*np,*cp,v;
 483         BUF_MEM *buf;
 484
 485         if ((buf=BUF_MEM_new()) == NULL) return(0);
 486
 487         len=strlen(from)+1;
 488         if (!BUF_MEM_grow(buf,len)) goto err;
 489
 490         for (;;)
 491                 {
 492                 if (IS_QUOTE(conf,*from))
 493                         {
 494                         q= *from;
 495                         from++;
 496                         while (!IS_EOF(conf,*from) && (*from != q))
 497                                 {
 498                                 if (IS_ESC(conf,*from))
 499                                         {
 500                                         from++;
 501                                         if (IS_EOF(conf,*from)) break;
 502                                         }
 503                                 buf->data[to++]= *(from++);
 504                                 }
 505                         if (*from == q) from++;
 506                         }
 507                 else if (IS_DQUOTE(conf,*from))
 508                         {
 509                         q= *from;
 510                         from++;
 511                         while (!IS_EOF(conf,*from))
 512                                 {
 513                                 if (*from == q)
 514                                         {
 515                                         if (*(from+1) == q)
 516                                                 {
 517                                                 from++;
 518                                                 }
 519                                         else
 520                                                 {
 521                                                 break;
 522                                                 }
 523                                         }
 524                                 buf->data[to++]= *(from++);
 525                                 }
 526                         if (*from == q) from++;
 527                         }
 528                 else if (IS_ESC(conf,*from))
 529                         {
 530                         from++;
 531                         v= *(from++);
 532                         if (IS_EOF(conf,v)) break;
 533                         else if (v == 'r') v='\r';
 534                         else if (v == 'n') v='\n';
 535                         else if (v == 'b') v='\b';
 536                         else if (v == 't') v='\t';
 537                         buf->data[to++]= v;
 538                         }
 539                 else if (IS_EOF(conf,*from))
 540                         break;
 541                 else if (*from == '$')
 542                         {
 543                         /* try to expand it */
 544                         rrp=NULL;
 545                         s= &(from[1]);
 546                         if (*s == '{')
 547                                 q='}';
 548                         else if (*s == '(')
 549                                 q=')';
 550                         else q=0;
 551
 552                         if (q) s++;
 553                         cp=section;
 554                         e=np=s;
 555                         while (IS_ALPHA_NUMERIC(conf,*e))
 556                                 e++;
 557                         if ((e[0] == ':') && (e[1] == ':'))
 558                                 {
 559                                 cp=np;
 560                                 rrp=e;
 561                                 rr= *e;
 562                                 *rrp='\0';
 563                                 e+=2;
 564                                 np=e;
 565                                 while (IS_ALPHA_NUMERIC(conf,*e))
 566                                         e++;
 567                                 }
 568                         r= *e;
 569                         *e='\0';
 570                         rp=e;
 571                         if (q)
 572                                 {
 573                                 if (r != q)
 574                                         {
 575                                         CONFerr(CONF_F_STR_COPY,CONF_R_NO_CLOSE_BRACE);
 576                                         goto err;
 577                                         }
 578                                 e++;
 579                                 }
 580                         /* So at this point we have
 581                          * ns which is the start of the name string which is
 582                          *   '\0' terminated.
 583                          * cs which is the start of the section string which is
 584                          *   '\0' terminated.
 585                          * e is the 'next point after'.
 586                          * r and s are the chars replaced by the '\0'
 587                          * rp and sp is where 'r' and 's' came from.
 588                          */
 589                         p=_CONF_get_string(conf,cp,np);
 590                         if (rrp != NULL) *rrp=rr;
 591                         *rp=r;
 592                         if (p == NULL)
 593                                 {
 594                                 CONFerr(CONF_F_STR_COPY,CONF_R_VARIABLE_HAS_NO_VALUE);
 595                                 goto err;
 596                                 }
 597                         BUF_MEM_grow(buf,(strlen(p)+len-(e-from)));
 598                         while (*p)
 599                                 buf->data[to++]= *(p++);
 600                         from=e;
 601                         }
 602                 else
 603                         buf->data[to++]= *(from++);
 604                 }
 605         buf->data[to]='\0';
 606         if (*pto != NULL) OPENSSL_free(*pto);
 607         *pto=buf->data;
 608         OPENSSL_free(buf);
 609         return(1);
 610 err:
 611         if (buf != NULL) BUF_MEM_free(buf);
 612         return(0);
 613         }
 614
 615 static char *eat_ws(CONF *conf, char *p)
 616         {
 617         while (IS_WS(conf,*p) && (!IS_EOF(conf,*p)))
 618                 p++;
 619         return(p);
 620         }
 621
 622 static char *eat_alpha_numeric(CONF *conf, char *p)
 623         {
 624         for (;;)
 625                 {
 626                 if (IS_ESC(conf,*p))
 627                         {
 628                         p=scan_esc(conf,p);
 629                         continue;
 630                         }
 631                 if (!IS_ALPHA_NUMERIC_PUNCT(conf,*p))
 632                         return(p);
 633                 p++;
 634                 }
 635         }
 636
 637 static char *scan_quote(CONF *conf, char *p)
 638         {
 639         int q= *p;
 640
 641         p++;
 642         while (!(IS_EOF(conf,*p)) && (*p != q))
 643                 {
 644                 if (IS_ESC(conf,*p))
 645                         {
 646                         p++;
 647                         if (IS_EOF(conf,*p)) return(p);
 648                         }
 649                 p++;
 650                 }
 651         if (*p == q) p++;
 652         return(p);
 653         }
 654
 655
 656 static char *scan_dquote(CONF *conf, char *p)
 657         {
 658         int q= *p;
 659
 660         p++;
 661         while (!(IS_EOF(conf,*p)))
 662                 {
 663                 if (*p == q)
 664                         {
 665                         if (*(p+1) == q)
 666                                 {
 667                                 p++;
 668                                 }
 669                         else
 670                                 {
 671                                 break;
 672                                 }
 673                         }
 674                 p++;
 675                 }
 676         if (*p == q) p++;
 677         return(p);
 678         }
 679
 680 static void dump_value(CONF_VALUE *a, BIO *out)
 681         {
 682         if (a->name)
 683                 BIO_printf(out, "[%s] %s=%s\n", a->section, a->name, a->value);
 684         else
 685                 BIO_printf(out, "[[%s]]\n", a->section);
 686         }
 687
 688 static int def_dump(CONF *conf, BIO *out)
 689         {
 690         lh_doall_arg(conf->data, (void (*)())dump_value, out);
 691         return 1;
 692         }
 693
 694 static int def_is_number(CONF *conf, char c)
 695         {
 696         return IS_NUMBER(conf,c);
 697         }
 698
 699 static int def_to_int(CONF *conf, char c)
 700         {
 701         return c - '0';
 702         }
 703