crypto/conf/conf.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 #include <stdio.h>
  60 #include <errno.h>
  61 #include "cryptlib.h"
  62 #include "stack.h"
  63 #include "lhash.h"
  64 #include "conf.h"
  65 #include "buffer.h"
  66 #include "err.h"
  67
  68 #include "conf_lcl.h"
  69
  70 #ifndef NOPROTO
  71 static void value_free_hash(CONF_VALUE *a, LHASH *conf);
  72 static void value_free_stack(CONF_VALUE *a,LHASH *conf);
  73 static unsigned long hash(CONF_VALUE *v);
  74 static int cmp(CONF_VALUE *a,CONF_VALUE *b);
  75 static char *eat_ws(char *p);
  76 static char *eat_alpha_numeric(char *p);
  77 static void clear_comments(char *p);
  78 static int str_copy(LHASH *conf,char *section,char **to, char *from);
  79 static char *scan_quote(char *p);
  80 static CONF_VALUE *new_section(LHASH *conf,char *section);
  81 static CONF_VALUE *get_section(LHASH *conf,char *section);
  82 #else
  83 static void value_free_hash();
  84 static void value_free_stack();
  85 static unsigned long hash();
  86 static int cmp();
  87 static char *eat_ws();
  88 static char *eat_alpha_numeric();
  89 static void clear_comments();
  90 static int str_copy();
  91 static char *scan_quote();
  92 static CONF_VALUE *new_section();
  93 static CONF_VALUE *get_section();
  94 #endif
  95
  96 #define scan_esc(p)     ((*(++p) == '\0')?(p):(++p))
  97
  98 char *CONF_version="CONF part of SSLeay 0.9.0b 29-Jun-1998";
  99
 100 LHASH *CONF_load(h,file,line)
 101 LHASH *h;
 102 char *file;
 103 long *line;
 104         {
 105         LHASH *ret=NULL;
 106         FILE *in=NULL;
 107 #define BUFSIZE 512
 108         int bufnum=0,i,ii;
 109         BUF_MEM *buff=NULL;
 110         char *s,*p,*end;
 111         int again,n,eline=0;
 112         CONF_VALUE *v=NULL,*vv,*tv;
 113         CONF_VALUE *sv=NULL;
 114         char *section=NULL,*buf;
 115         STACK *section_sk=NULL,*ts;
 116         char *start,*psection,*pname;
 117
 118         if ((buff=BUF_MEM_new()) == NULL)
 119                 {
 120                 CONFerr(CONF_F_CONF_LOAD,ERR_R_BUF_LIB);
 121                 goto err;
 122                 }
 123
 124         in=fopen(file,"rb");
 125         if (in == NULL)
 126                 {
 127                 SYSerr(SYS_F_FOPEN,get_last_sys_error());
 128                 ERR_set_error_data(BUF_strdup(file),
 129                         ERR_TXT_MALLOCED|ERR_TXT_STRING);
 130                 CONFerr(CONF_F_CONF_LOAD,ERR_R_SYS_LIB);
 131                 goto err;
 132                 }
 133
 134         section=(char *)Malloc(10);
 135         if (section == NULL)
 136                 {
 137                 CONFerr(CONF_F_CONF_LOAD,ERR_R_MALLOC_FAILURE);
 138                 goto err;
 139                 }
 140         strcpy(section,"default");
 141
 142         if (h == NULL)
 143                 {
 144                 if ((ret=lh_new(hash,cmp)) == NULL)
 145                         {
 146                         CONFerr(CONF_F_CONF_LOAD,ERR_R_MALLOC_FAILURE);
 147                         goto err;
 148                         }
 149                 }
 150         else
 151                 ret=h;
 152
 153         sv=new_section(ret,section);
 154         if (sv == NULL)
 155                 {
 156                 CONFerr(CONF_F_CONF_LOAD,CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
 157                 goto err;
 158                 }
 159         section_sk=(STACK *)sv->value;
 160
 161         bufnum=0;
 162         for (;;)
 163                 {
 164                 again=0;
 165                 if (!BUF_MEM_grow(buff,bufnum+BUFSIZE))
 166                         {
 167                         CONFerr(CONF_F_CONF_LOAD,ERR_R_BUF_LIB);
 168                         goto err;
 169                         }
 170                 p= &(buff->data[bufnum]);
 171                 *p='\0';
 172                 fgets(p,BUFSIZE-1,in);
 173                 p[BUFSIZE-1]='\0';
 174                 ii=i=strlen(p);
 175                 if (i == 0) break;
 176                 while (i > 0)
 177                         {
 178                         if ((p[i-1] != '\r') && (p[i-1] != '\n'))
 179                                 break;
 180                         else
 181                                 i--;
 182                         }
 183                 /* we removed some trailing stuff so there is a new
 184                  * line on the end. */
 185                 if (i == ii)
 186                         again=1; /* long line */
 187                 else
 188                         {
 189                         p[i]='\0';
 190                         eline++; /* another input line */
 191                         }
 192
 193                 /* we now have a line with trailing \r\n removed */
 194
 195                 /* i is the number of bytes */
 196                 bufnum+=i;
 197
 198                 v=NULL;
 199                 /* check for line continuation */
 200                 if (bufnum >= 1)
 201                         {
 202                         /* If we have bytes and the last char '\\' and
 203                          * second last char is not '\\' */
 204                         p= &(buff->data[bufnum-1]);
 205                         if (    IS_ESC(p[0]) &&
 206                                 ((bufnum <= 1) || !IS_ESC(p[-1])))
 207                                 {
 208                                 bufnum--;
 209                                 again=1;
 210                                 }
 211                         }
 212                 if (again) continue;
 213                 bufnum=0;
 214                 buf=buff->data;
 215
 216                 clear_comments(buf);
 217                 n=strlen(buf);
 218                 s=eat_ws(buf);
 219                 if (IS_EOF(*s)) continue; /* blank line */
 220                 if (*s == '[')
 221                         {
 222                         s++;
 223                         start=eat_ws(s);
 224                         end=eat_alpha_numeric(start);
 225                         p=eat_ws(end);
 226                         if (*p != ']')
 227                                 {
 228                                 CONFerr(CONF_F_CONF_LOAD,CONF_R_MISSING_CLOSE_SQUARE_BRACKET);
 229                                 goto err;
 230                                 }
 231                         *end='\0';
 232                         if (!str_copy(ret,NULL,&section,start)) goto err;
 233                         if ((sv=get_section(ret,section)) == NULL)
 234                                 sv=new_section(ret,section);
 235                         if (sv == NULL)
 236                                 {
 237                                 CONFerr(CONF_F_CONF_LOAD,CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
 238                                 goto err;
 239                                 }
 240                         section_sk=(STACK *)sv->value;
 241                         continue;
 242                         }
 243                 else
 244                         {
 245                         pname=s;
 246                         psection=NULL;
 247                         end=eat_alpha_numeric(s);
 248                         if ((end[0] == ':') && (end[1] == ':'))
 249                                 {
 250                                 *end='\0';
 251                                 end+=2;
 252                                 psection=pname;
 253                                 pname=end;
 254                                 end=eat_alpha_numeric(end);
 255                                 }
 256                         p=eat_ws(end);
 257                         if (*p != '=')
 258                                 {
 259                                 CONFerr(CONF_F_CONF_LOAD,CONF_R_MISSING_EQUAL_SIGN);
 260                                 goto err;
 261                                 }
 262                         *end='\0';
 263                         p++;
 264                         start=eat_ws(p);
 265                         while (!IS_EOF(*p))
 266                                 p++;
 267                         p--;
 268                         while ((p != start) && (IS_WS(*p)))
 269                                 p--;
 270                         p++;
 271                         *p='\0';
 272
 273                         if ((v=(CONF_VALUE *)Malloc(sizeof(CONF_VALUE))) == NULL)
 274                                 {
 275                                 CONFerr(CONF_F_CONF_LOAD,ERR_R_MALLOC_FAILURE);
 276                                 goto err;
 277                                 }
 278                         if (psection == NULL) psection=section;
 279                         v->name=(char *)Malloc(strlen(pname)+1);
 280                         v->value=NULL;
 281                         if (v->name == NULL)
 282                                 {
 283                                 CONFerr(CONF_F_CONF_LOAD,ERR_R_MALLOC_FAILURE);
 284                                 goto err;
 285                                 }
 286                         strcpy(v->name,pname);
 287                         if (!str_copy(ret,psection,&(v->value),start)) goto err;
 288
 289                         if (strcmp(psection,section) != 0)
 290                                 {
 291                                 if ((tv=get_section(ret,psection))
 292                                         == NULL)
 293                                         tv=new_section(ret,psection);
 294                                 if (tv == NULL)
 295                                         {
 296                                         CONFerr(CONF_F_CONF_LOAD,CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
 297                                         goto err;
 298                                         }
 299                                 ts=(STACK *)tv->value;
 300                                 }
 301                         else
 302                                 {
 303                                 tv=sv;
 304                                 ts=section_sk;
 305                                 }
 306                         v->section=tv->section;
 307                         if (!sk_push(ts,(char *)v))
 308                                 {
 309                                 CONFerr(CONF_F_CONF_LOAD,ERR_R_MALLOC_FAILURE);
 310                                 goto err;
 311                                 }
 312                         vv=(CONF_VALUE *)lh_insert(ret,(char *)v);
 313                         if (vv != NULL)
 314                                 {
 315                                 sk_delete_ptr(ts,(char *)vv);
 316                                 Free(vv->name);
 317                                 Free(vv->value);
 318                                 Free(vv);
 319                                 }
 320                         v=NULL;
 321                         }
 322                 }
 323         if (buff != NULL) BUF_MEM_free(buff);
 324         if (section != NULL) Free(section);
 325         if (in != NULL) fclose(in);
 326         return(ret);
 327 err:
 328         if (buff != NULL) BUF_MEM_free(buff);
 329         if (section != NULL) Free(section);
 330         if (line != NULL) *line=eline;
 331         if (in != NULL) fclose(in);
 332         if ((h != ret) && (ret != NULL)) CONF_free(ret);
 333         if (v != NULL)
 334                 {
 335                 if (v->name != NULL) Free(v->name);
 336                 if (v->value != NULL) Free(v->value);
 337                 if (v != NULL) Free(v);
 338                 }
 339         return(NULL);
 340         }
 341
 342 char *CONF_get_string(conf,section,name)
 343 LHASH *conf;
 344 char *section;
 345 char *name;
 346         {
 347         CONF_VALUE *v,vv;
 348         char *p;
 349
 350         if (name == NULL) return(NULL);
 351         if (conf != NULL)
 352                 {
 353                 if (section != NULL)
 354                         {
 355                         vv.name=name;
 356                         vv.section=section;
 357                         v=(CONF_VALUE *)lh_retrieve(conf,(char *)&vv);
 358                         if (v != NULL) return(v->value);
 359                         if (strcmp(section,"ENV") == 0)
 360                                 {
 361                                 p=Getenv(name);
 362                                 if (p != NULL) return(p);
 363                                 }
 364                         }
 365                 vv.section="default";
 366                 vv.name=name;
 367                 v=(CONF_VALUE *)lh_retrieve(conf,(char *)&vv);
 368                 if (v != NULL)
 369                         return(v->value);
 370                 else
 371                         return(NULL);
 372                 }
 373         else
 374                 return(Getenv(name));
 375         }
 376
 377 static CONF_VALUE *get_section(conf,section)
 378 LHASH *conf;
 379 char *section;
 380         {
 381         CONF_VALUE *v,vv;
 382
 383         if ((conf == NULL) || (section == NULL)) return(NULL);
 384         vv.name=NULL;
 385         vv.section=section;
 386         v=(CONF_VALUE *)lh_retrieve(conf,(char *)&vv);
 387         return(v);
 388         }
 389
 390 STACK *CONF_get_section(conf,section)
 391 LHASH *conf;
 392 char *section;
 393         {
 394         CONF_VALUE *v;
 395
 396         v=get_section(conf,section);
 397         if (v != NULL)
 398                 return((STACK *)v->value);
 399         else
 400                 return(NULL);
 401         }
 402
 403 long CONF_get_number(conf,section,name)
 404 LHASH *conf;
 405 char *section;
 406 char *name;
 407         {
 408         char *str;
 409         long ret=0;
 410
 411         str=CONF_get_string(conf,section,name);
 412         if (str == NULL) return(0);
 413         for (;;)
 414                 {
 415                 if (IS_NUMER(*str))
 416                         ret=ret*10+(*str -'0');
 417                 else
 418                         return(ret);
 419                 str++;
 420                 }
 421         }
 422
 423 void CONF_free(conf)
 424 LHASH *conf;
 425         {
 426         if (conf == NULL) return;
 427
 428         conf->down_load=0;      /* evil thing to make sure the 'Free()'
 429                                  * works as expected */
 430         lh_doall_arg(conf,(void (*)())value_free_hash,(char *)conf);
 431
 432         /* We now have only 'section' entries in the hash table.
 433          * Due to problems with */
 434
 435         lh_doall_arg(conf,(void (*)())value_free_stack,(char *)conf);
 436         lh_free(conf);
 437         }
 438
 439 static void value_free_hash(a,conf)
 440 CONF_VALUE *a;
 441 LHASH *conf;
 442         {
 443         if (a->name != NULL)
 444                 {
 445                 a=(CONF_VALUE *)lh_delete(conf,(char *)a);
 446                 }
 447         }
 448
 449 static void value_free_stack(a,conf)
 450 CONF_VALUE *a;
 451 LHASH *conf;
 452         {
 453         CONF_VALUE *vv;
 454         STACK *sk;
 455         int i;
 456
 457         if (a->name != NULL) return;
 458
 459         sk=(STACK *)a->value;
 460         for (i=sk_num(sk)-1; i>=0; i--)
 461                 {
 462                 vv=(CONF_VALUE *)sk_value(sk,i);
 463                 Free(vv->value);
 464                 Free(vv->name);
 465                 Free(vv);
 466                 }
 467         if (sk != NULL) sk_free(sk);
 468         Free(a->section);
 469         Free(a);
 470         }
 471
 472 static void clear_comments(p)
 473 char *p;
 474         {
 475         char *to;
 476
 477         to=p;
 478         for (;;)
 479                 {
 480                 if (IS_COMMENT(*p))
 481                         {
 482                         *p='\0';
 483                         return;
 484                         }
 485                 if (IS_QUOTE(*p))
 486                         {
 487                         p=scan_quote(p);
 488                         continue;
 489                         }
 490                 if (IS_ESC(*p))
 491                         {
 492                         p=scan_esc(p);
 493                         continue;
 494                         }
 495                 if (IS_EOF(*p))
 496                         return;
 497                 else
 498                         p++;
 499                 }
 500         }
 501
 502 static int str_copy(conf,section,pto,from)
 503 LHASH *conf;
 504 char *section;
 505 char **pto,*from;
 506         {
 507         int q,r,rr=0,to=0,len=0;
 508         char *s,*e,*rp,*p,*rrp,*np,*cp,v;
 509         BUF_MEM *buf;
 510
 511         if ((buf=BUF_MEM_new()) == NULL) return(0);
 512
 513         len=strlen(from)+1;
 514         if (!BUF_MEM_grow(buf,len)) goto err;
 515
 516         for (;;)
 517                 {
 518                 if (IS_QUOTE(*from))
 519                         {
 520                         q= *from;
 521                         from++;
 522                         while ((*from != '\0') && (*from != q))
 523                                 {
 524                                 if (*from == '\\')
 525                                         {
 526                                         from++;
 527                                         if (*from == '\0') break;
 528                                         }
 529                                 buf->data[to++]= *(from++);
 530                                 }
 531                         }
 532                 else if (*from == '\\')
 533                         {
 534                         from++;
 535                         v= *(from++);
 536                         if (v == '\0') break;
 537                         else if (v == 'r') v='\r';
 538                         else if (v == 'n') v='\n';
 539                         else if (v == 'b') v='\b';
 540                         else if (v == 't') v='\t';
 541                         buf->data[to++]= v;
 542                         }
 543                 else if (*from == '\0')
 544                         break;
 545                 else if (*from == '$')
 546                         {
 547                         /* try to expand it */
 548                         rrp=NULL;
 549                         s= &(from[1]);
 550                         if (*s == '{')
 551                                 q='}';
 552                         else if (*s == '(')
 553                                 q=')';
 554                         else q=0;
 555
 556                         if (q) s++;
 557                         cp=section;
 558                         e=np=s;
 559                         while (IS_ALPHA_NUMERIC(*e))
 560                                 e++;
 561                         if ((e[0] == ':') && (e[1] == ':'))
 562                                 {
 563                                 cp=np;
 564                                 rrp=e;
 565                                 rr= *e;
 566                                 *rrp='\0';
 567                                 e+=2;
 568                                 np=e;
 569                                 while (IS_ALPHA_NUMERIC(*e))
 570                                         e++;
 571                                 }
 572                         r= *e;
 573                         *e='\0';
 574                         rp=e;
 575                         if (q)
 576                                 {
 577                                 if (r != q)
 578                                         {
 579                                         CONFerr(CONF_F_STR_COPY,CONF_R_NO_CLOSE_BRACE);
 580                                         goto err;
 581                                         }
 582                                 e++;
 583                                 }
 584                         /* So at this point we have
 585                          * ns which is the start of the name string which is
 586                          *   '\0' terminated.
 587                          * cs which is the start of the section string which is
 588                          *   '\0' terminated.
 589                          * e is the 'next point after'.
 590                          * r and s are the chars replaced by the '\0'
 591                          * rp and sp is where 'r' and 's' came from.
 592                          */
 593                         p=CONF_get_string(conf,cp,np);
 594                         if (rrp != NULL) *rrp=rr;
 595                         *rp=r;
 596                         if (p == NULL)
 597                                 {
 598                                 CONFerr(CONF_F_STR_COPY,CONF_R_VARIABLE_HAS_NO_VALUE);
 599                                 goto err;
 600                                 }
 601                         BUF_MEM_grow(buf,(strlen(p)+len-(e-from)));
 602                         while (*p)
 603                                 buf->data[to++]= *(p++);
 604                         from=e;
 605                         }
 606                 else
 607                         buf->data[to++]= *(from++);
 608                 }
 609         buf->data[to]='\0';
 610         if (*pto != NULL) Free(*pto);
 611         *pto=buf->data;
 612         Free(buf);
 613         return(1);
 614 err:
 615         if (buf != NULL) BUF_MEM_free(buf);
 616         return(0);
 617         }
 618
 619 static char *eat_ws(p)
 620 char *p;
 621         {
 622         while (IS_WS(*p) && (!IS_EOF(*p)))
 623                 p++;
 624         return(p);
 625         }
 626
 627 static char *eat_alpha_numeric(p)
 628 char *p;
 629         {
 630         for (;;)
 631                 {
 632                 if (IS_ESC(*p))
 633                         {
 634                         p=scan_esc(p);
 635                         continue;
 636                         }
 637                 if (!IS_ALPHA_NUMERIC_PUNCT(*p))
 638                         return(p);
 639                 p++;
 640                 }
 641         }
 642
 643 static unsigned long hash(v)
 644 CONF_VALUE *v;
 645         {
 646         return((lh_strhash(v->section)<<2)^lh_strhash(v->name));
 647         }
 648
 649 static int cmp(a,b)
 650 CONF_VALUE *a,*b;
 651         {
 652         int i;
 653
 654         if (a->section != b->section)
 655                 {
 656                 i=strcmp(a->section,b->section);
 657                 if (i) return(i);
 658                 }
 659
 660         if ((a->name != NULL) && (b->name != NULL))
 661                 {
 662                 i=strcmp(a->name,b->name);
 663                 return(i);
 664                 }
 665         else if (a->name == b->name)
 666                 return(0);
 667         else
 668                 return((a->name == NULL)?-1:1);
 669         }
 670
 671 static char *scan_quote(p)
 672 char *p;
 673         {
 674         int q= *p;
 675
 676         p++;
 677         while (!(IS_EOF(*p)) && (*p != q))
 678                 {
 679                 if (IS_ESC(*p))
 680                         {
 681                         p++;
 682                         if (IS_EOF(*p)) return(p);
 683                         }
 684                 p++;
 685                 }
 686         if (*p == q) p++;
 687         return(p);
 688         }
 689
 690 static CONF_VALUE *new_section(conf,section)
 691 LHASH *conf;
 692 char *section;
 693         {
 694         STACK *sk=NULL;
 695         int ok=0,i;
 696         CONF_VALUE *v=NULL,*vv;
 697
 698         if ((sk=sk_new_null()) == NULL)
 699                 goto err;
 700         if ((v=(CONF_VALUE *)Malloc(sizeof(CONF_VALUE))) == NULL)
 701                 goto err;
 702         i=strlen(section)+1;
 703         if ((v->section=(char *)Malloc(i)) == NULL)
 704                 goto err;
 705
 706         memcpy(v->section,section,i);
 707         v->name=NULL;
 708         v->value=(char *)sk;
 709
 710         vv=(CONF_VALUE *)lh_insert(conf,(char *)v);
 711         if (vv != NULL)
 712                 {
 713 #if !defined(NO_STDIO) && !defined(WIN16)
 714                 fprintf(stderr,"internal fault\n");
 715 #endif
 716                 abort();
 717                 }
 718         ok=1;
 719 err:
 720         if (!ok)
 721                 {
 722                 if (sk != NULL) sk_free(sk);
 723                 if (v != NULL) Free(v);
 724                 v=NULL;
 725                 }
 726         return(v);
 727         }