lib/krb5/config_file.c

   1 /*
   2  * Copyright (c) 1997 - 2004 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #define KRB5_DEPRECATED
  37
  38 #include "krb5_locl.h"
  39
  40 #ifdef __APPLE__
  41 #include <CoreFoundation/CoreFoundation.h>
  42 #endif
  43
  44 /* Gaah! I want a portable funopen */
  45 struct fileptr {
  46     const char *s;
  47     FILE *f;
  48 };
  49
  50 static char *
  51 config_fgets(char *str, size_t len, struct fileptr *ptr)
  52 {
  53     /* XXX this is not correct, in that they don't do the same if the
  54        line is longer than len */
  55     if(ptr->f != NULL)
  56         return fgets(str, len, ptr->f);
  57     else {
  58         /* this is almost strsep_copy */
  59         const char *p;
  60         ssize_t l;
  61         if(*ptr->s == '\0')
  62             return NULL;
  63         p = ptr->s + strcspn(ptr->s, "\n");
  64         if(*p == '\n')
  65             p++;
  66         l = min(len, p - ptr->s);
  67         if(len > 0) {
  68             memcpy(str, ptr->s, l);
  69             str[l] = '\0';
  70         }
  71         ptr->s = p;
  72         return str;
  73     }
  74 }
  75
  76 static krb5_error_code parse_section(char *p, krb5_config_section **s,
  77                                      krb5_config_section **res,
  78                                      const char **error_message);
  79 static krb5_error_code parse_binding(struct fileptr *f, unsigned *lineno, char *p,
  80                                      krb5_config_binding **b,
  81                                      krb5_config_binding **parent,
  82                                      const char **error_message);
  83 static krb5_error_code parse_list(struct fileptr *f, unsigned *lineno,
  84                                   krb5_config_binding **parent,
  85                                   const char **error_message);
  86
  87 static krb5_config_section *
  88 get_entry(krb5_config_section **parent, const char *name, int type)
  89 {
  90     krb5_config_section **q;
  91
  92     for(q = parent; *q != NULL; q = &(*q)->next)
  93         if(type == krb5_config_list &&
  94            type == (*q)->type &&
  95            strcmp(name, (*q)->name) == 0)
  96             return *q;
  97     *q = calloc(1, sizeof(**q));
  98     if(*q == NULL)
  99         return NULL;
 100     (*q)->name = strdup(name);
 101     (*q)->type = type;
 102     if((*q)->name == NULL) {
 103         free(*q);
 104         *q = NULL;
 105         return NULL;
 106     }
 107     return *q;
 108 }
 109
 110 /*
 111  * Parse a section:
 112  *
 113  * [section]
 114  *      foo = bar
 115  *      b = {
 116  *              a
 117  *          }
 118  * ...
 119  *
 120  * starting at the line in `p', storing the resulting structure in
 121  * `s' and hooking it into `parent'.
 122  * Store the error message in `error_message'.
 123  */
 124
 125 static krb5_error_code
 126 parse_section(char *p, krb5_config_section **s, krb5_config_section **parent,
 127               const char **error_message)
 128 {
 129     char *p1;
 130     krb5_config_section *tmp;
 131
 132     p1 = strchr (p + 1, ']');
 133     if (p1 == NULL) {
 134         *error_message = "missing ]";
 135         return KRB5_CONFIG_BADFORMAT;
 136     }
 137     *p1 = '\0';
 138     tmp = get_entry(parent, p + 1, krb5_config_list);
 139     if(tmp == NULL) {
 140         *error_message = "out of memory";
 141         return KRB5_CONFIG_BADFORMAT;
 142     }
 143     *s = tmp;
 144     return 0;
 145 }
 146
 147 /*
 148  * Parse a brace-enclosed list from `f', hooking in the structure at
 149  * `parent'.
 150  * Store the error message in `error_message'.
 151  */
 152
 153 static krb5_error_code
 154 parse_list(struct fileptr *f, unsigned *lineno, krb5_config_binding **parent,
 155            const char **error_message)
 156 {
 157     char buf[BUFSIZ];
 158     krb5_error_code ret;
 159     krb5_config_binding *b = NULL;
 160     unsigned beg_lineno = *lineno;
 161
 162     while(config_fgets(buf, sizeof(buf), f) != NULL) {
 163         char *p;
 164
 165         ++*lineno;
 166         buf[strcspn(buf, "\r\n")] = '\0';
 167         p = buf;
 168         while(isspace((unsigned char)*p))
 169             ++p;
 170         if (*p == '#' || *p == ';' || *p == '\0')
 171             continue;
 172         while(isspace((unsigned char)*p))
 173             ++p;
 174         if (*p == '}')
 175             return 0;
 176         if (*p == '\0')
 177             continue;
 178         ret = parse_binding (f, lineno, p, &b, parent, error_message);
 179         if (ret)
 180             return ret;
 181     }
 182     *lineno = beg_lineno;
 183     *error_message = "unclosed {";
 184     return KRB5_CONFIG_BADFORMAT;
 185 }
 186
 187 /*
 188  *
 189  */
 190
 191 static krb5_error_code
 192 parse_binding(struct fileptr *f, unsigned *lineno, char *p,
 193               krb5_config_binding **b, krb5_config_binding **parent,
 194               const char **error_message)
 195 {
 196     krb5_config_binding *tmp;
 197     char *p1, *p2;
 198     krb5_error_code ret = 0;
 199
 200     p1 = p;
 201     while (*p && *p != '=' && !isspace((unsigned char)*p))
 202         ++p;
 203     if (*p == '\0') {
 204         *error_message = "missing =";
 205         return KRB5_CONFIG_BADFORMAT;
 206     }
 207     p2 = p;
 208     while (isspace((unsigned char)*p))
 209         ++p;
 210     if (*p != '=') {
 211         *error_message = "missing =";
 212         return KRB5_CONFIG_BADFORMAT;
 213     }
 214     ++p;
 215     while(isspace((unsigned char)*p))
 216         ++p;
 217     *p2 = '\0';
 218     if (*p == '{') {
 219         tmp = get_entry(parent, p1, krb5_config_list);
 220         if (tmp == NULL) {
 221             *error_message = "out of memory";
 222             return KRB5_CONFIG_BADFORMAT;
 223         }
 224         ret = parse_list (f, lineno, &tmp->u.list, error_message);
 225     } else {
 226         tmp = get_entry(parent, p1, krb5_config_string);
 227         if (tmp == NULL) {
 228             *error_message = "out of memory";
 229             return KRB5_CONFIG_BADFORMAT;
 230         }
 231         p1 = p;
 232         p = p1 + strlen(p1);
 233         while(p > p1 && isspace((unsigned char)*(p-1)))
 234             --p;
 235         *p = '\0';
 236         tmp->u.string = strdup(p1);
 237     }
 238     *b = tmp;
 239     return ret;
 240 }
 241
 242 #if defined(__APPLE__)
 243
 244 #if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
 245 #define HAVE_CFPROPERTYLISTCREATEWITHSTREAM 1
 246 #endif
 247
 248 static char *
 249 cfstring2cstring(CFStringRef string)
 250 {
 251     CFIndex len;
 252     char *str;
 253
 254     str = (char *) CFStringGetCStringPtr(string, kCFStringEncodingUTF8);
 255     if (str)
 256         return strdup(str);
 257
 258     len = CFStringGetLength(string);
 259     len = 1 + CFStringGetMaximumSizeForEncoding(len, kCFStringEncodingUTF8);
 260     str = malloc(len);
 261     if (str == NULL)
 262         return NULL;
 263
 264     if (!CFStringGetCString (string, str, len, kCFStringEncodingUTF8)) {
 265         free (str);
 266         return NULL;
 267     }
 268     return str;
 269 }
 270
 271 static void
 272 convert_content(const void *key, const void *value, void *context)
 273 {
 274     krb5_config_section *tmp, **parent = context;
 275     char *k;
 276
 277     if (CFGetTypeID(key) != CFStringGetTypeID())
 278         return;
 279
 280     k = cfstring2cstring(key);
 281     if (k == NULL)
 282         return;
 283
 284     if (CFGetTypeID(value) == CFStringGetTypeID()) {
 285         tmp = get_entry(parent, k, krb5_config_string);
 286         tmp->u.string = cfstring2cstring(value);
 287     } else if (CFGetTypeID(value) == CFDictionaryGetTypeID()) {
 288         tmp = get_entry(parent, k, krb5_config_list);
 289         CFDictionaryApplyFunction(value, convert_content, &tmp->u.list);
 290     } else {
 291         /* log */
 292     }
 293     free(k);
 294 }
 295
 296 static krb5_error_code
 297 parse_plist_config(krb5_context context, const char *path, krb5_config_section **parent)
 298 {
 299     CFReadStreamRef s;
 300     CFDictionaryRef d;
 301     CFURLRef url;
 302
 303     url = CFURLCreateFromFileSystemRepresentation(kCFAllocatorDefault, (UInt8 *)path, strlen(path), FALSE);
 304     if (url == NULL) {
 305         krb5_clear_error_message(context);
 306         return ENOMEM;
 307     }
 308
 309     s = CFReadStreamCreateWithFile(kCFAllocatorDefault, url);
 310     CFRelease(url);
 311     if (s == NULL) {
 312         krb5_clear_error_message(context);
 313         return ENOMEM;
 314     }
 315
 316     if (!CFReadStreamOpen(s)) {
 317         CFRelease(s);
 318         krb5_clear_error_message(context);
 319         return ENOENT;
 320     }
 321
 322 #ifdef HAVE_CFPROPERTYLISTCREATEWITHSTREAM
 323     d = (CFDictionaryRef)CFPropertyListCreateWithStream(NULL, s, 0, kCFPropertyListImmutable, NULL, NULL);
 324 #else
 325     d = (CFDictionaryRef)CFPropertyListCreateFromStream(NULL, s, 0, kCFPropertyListImmutable, NULL, NULL);
 326 #endif
 327     CFRelease(s);
 328     if (d == NULL) {
 329         krb5_clear_error_message(context);
 330         return ENOENT;
 331     }
 332
 333     CFDictionaryApplyFunction(d, convert_content, parent);
 334     CFRelease(d);
 335
 336     return 0;
 337 }
 338
 339 #endif
 340
 341
 342 /*
 343  * Parse the config file `fname', generating the structures into `res'
 344  * returning error messages in `error_message'
 345  */
 346
 347 static krb5_error_code
 348 krb5_config_parse_debug (struct fileptr *f,
 349                          krb5_config_section **res,
 350                          unsigned *lineno,
 351                          const char **error_message)
 352 {
 353     krb5_config_section *s = NULL;
 354     krb5_config_binding *b = NULL;
 355     char buf[BUFSIZ];
 356     krb5_error_code ret;
 357
 358     while (config_fgets(buf, sizeof(buf), f) != NULL) {
 359         char *p;
 360
 361         ++*lineno;
 362         buf[strcspn(buf, "\r\n")] = '\0';
 363         p = buf;
 364         while(isspace((unsigned char)*p))
 365             ++p;
 366         if (*p == '#' || *p == ';')
 367             continue;
 368         if (*p == '[') {
 369             ret = parse_section(p, &s, res, error_message);
 370             if (ret)
 371                 return ret;
 372             b = NULL;
 373         } else if (*p == '}') {
 374             *error_message = "unmatched }";
 375             return EINVAL;      /* XXX */
 376         } else if(*p != '\0') {
 377             if (s == NULL) {
 378                 *error_message = "binding before section";
 379                 return EINVAL;
 380             }
 381             ret = parse_binding(f, lineno, p, &b, &s->u.list, error_message);
 382             if (ret)
 383                 return ret;
 384         }
 385     }
 386     return 0;
 387 }
 388
 389 static int
 390 is_plist_file(const char *fname)
 391 {
 392     size_t len = strlen(fname);
 393     char suffix[] = ".plist";
 394     if (len < sizeof(suffix))
 395         return 0;
 396     if (strcasecmp(&fname[len - (sizeof(suffix) - 1)], suffix) != 0)
 397         return 0;
 398     return 1;
 399 }
 400
 401 /**
 402  * Parse a configuration file and add the result into res. This
 403  * interface can be used to parse several configuration files into one
 404  * resulting krb5_config_section by calling it repeatably.
 405  *
 406  * @param context a Kerberos 5 context.
 407  * @param fname a file name to a Kerberos configuration file
 408  * @param res the returned result, must be free with krb5_free_config_files().
 409  * @return Return an error code or 0, see krb5_get_error_message().
 410  *
 411  * @ingroup krb5_support
 412  */
 413
 414 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
 415 krb5_config_parse_file_multi (krb5_context context,
 416                               const char *fname,
 417                               krb5_config_section **res)
 418 {
 419     const char *str;
 420     char *newfname = NULL;
 421     unsigned lineno = 0;
 422     krb5_error_code ret;
 423     struct fileptr f;
 424
 425     /**
 426      * If the fname starts with "~/" parse configuration file in the
 427      * current users home directory. The behavior can be disabled and
 428      * enabled by calling krb5_set_home_dir_access().
 429      */
 430     if (fname[0] == '~' && fname[1] == '/') {
 431 #ifndef KRB5_USE_PATH_TOKENS
 432         const char *home = NULL;
 433
 434         if (!_krb5_homedir_access(context)) {
 435             krb5_set_error_message(context, EPERM,
 436                                    "Access to home directory not allowed");
 437             return EPERM;
 438         }
 439
 440         if(!issuid())
 441             home = getenv("HOME");
 442
 443         if (home == NULL) {
 444             struct passwd *pw = getpwuid(getuid());
 445             if(pw != NULL)
 446                 home = pw->pw_dir;
 447         }
 448         if (home) {
 449             asprintf(&newfname, "%s%s", home, &fname[1]);
 450             if (newfname == NULL) {
 451                 krb5_set_error_message(context, ENOMEM,
 452                                        N_("malloc: out of memory", ""));
 453                 return ENOMEM;
 454             }
 455             fname = newfname;
 456         }
 457 #else  /* KRB5_USE_PATH_TOKENS */
 458         if (asprintf(&newfname, "%%{USERCONFIG}%s", &fname[1]) < 0 ||
 459             newfname == NULL)
 460         {
 461             krb5_set_error_message(context, ENOMEM,
 462                                    N_("malloc: out of memory", ""));
 463             return ENOMEM;
 464         }
 465         fname = newfname;
 466 #endif
 467     }
 468
 469     if (is_plist_file(fname)) {
 470 #ifdef __APPLE__
 471         ret = parse_plist_config(context, fname, res);
 472         if (ret) {
 473             krb5_set_error_message(context, ret,
 474                                    "Failed to parse plist %s", fname);
 475             if (newfname)
 476                 free(newfname);
 477             return ret;
 478         }
 479 #else
 480         krb5_set_error_message(context, ENOENT,
 481                                "no support for plist configuration files");
 482         return ENOENT;
 483 #endif
 484     } else {
 485 #ifdef KRB5_USE_PATH_TOKENS
 486         char * exp_fname = NULL;
 487
 488         ret = _krb5_expand_path_tokens(context, fname, &exp_fname);
 489         if (ret) {
 490             if (newfname)
 491                 free(newfname);
 492             return ret;
 493         }
 494
 495         if (newfname)
 496             free(newfname);
 497         fname = newfname = exp_fname;
 498 #endif
 499
 500         f.f = fopen(fname, "r");
 501         f.s = NULL;
 502         if(f.f == NULL) {
 503             ret = errno;
 504             krb5_set_error_message (context, ret, "open %s: %s",
 505                                     fname, strerror(ret));
 506             if (newfname)
 507                 free(newfname);
 508             return ret;
 509         }
 510
 511         ret = krb5_config_parse_debug (&f, res, &lineno, &str);
 512         fclose(f.f);
 513         if (ret) {
 514             krb5_set_error_message (context, ret, "%s:%u: %s",
 515                                     fname, lineno, str);
 516             if (newfname)
 517                 free(newfname);
 518             return ret;
 519         }
 520     }
 521     return 0;
 522 }
 523
 524 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
 525 krb5_config_parse_file (krb5_context context,
 526                         const char *fname,
 527                         krb5_config_section **res)
 528 {
 529     *res = NULL;
 530     return krb5_config_parse_file_multi(context, fname, res);
 531 }
 532
 533 static void
 534 free_binding (krb5_context context, krb5_config_binding *b)
 535 {
 536     krb5_config_binding *next_b;
 537
 538     while (b) {
 539         free (b->name);
 540         if (b->type == krb5_config_string)
 541             free (b->u.string);
 542         else if (b->type == krb5_config_list)
 543             free_binding (context, b->u.list);
 544         else
 545             krb5_abortx(context, "unknown binding type (%d) in free_binding",
 546                         b->type);
 547         next_b = b->next;
 548         free (b);
 549         b = next_b;
 550     }
 551 }
 552
 553 /**
 554  * Free configuration file section, the result of
 555  * krb5_config_parse_file() and krb5_config_parse_file_multi().
 556  *
 557  * @param context A Kerberos 5 context
 558  * @param s the configuration section to free
 559  *
 560  * @return returns 0 on successes, otherwise an error code, see
 561  *          krb5_get_error_message()
 562  *
 563  * @ingroup krb5_support
 564  */
 565
 566 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
 567 krb5_config_file_free (krb5_context context, krb5_config_section *s)
 568 {
 569     free_binding (context, s);
 570     return 0;
 571 }
 572
 573 #ifndef HEIMDAL_SMALLER
 574
 575 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
 576 _krb5_config_copy(krb5_context context,
 577                   krb5_config_section *c,
 578                   krb5_config_section **head)
 579 {
 580     krb5_config_binding *d, *previous = NULL;
 581
 582     *head = NULL;
 583
 584     while (c) {
 585         d = calloc(1, sizeof(*d));
 586
 587         if (*head == NULL)
 588             *head = d;
 589
 590         d->name = strdup(c->name);
 591         d->type = c->type;
 592         if (d->type == krb5_config_string)
 593             d->u.string = strdup(c->u.string);
 594         else if (d->type == krb5_config_list)
 595             _krb5_config_copy (context, c->u.list, &d->u.list);
 596         else
 597             krb5_abortx(context,
 598                         "unknown binding type (%d) in krb5_config_copy",
 599                         d->type);
 600         if (previous)
 601             previous->next = d;
 602
 603         previous = d;
 604         c = c->next;
 605     }
 606     return 0;
 607 }
 608
 609 #endif /* HEIMDAL_SMALLER */
 610
 611 KRB5_LIB_FUNCTION const void * KRB5_LIB_CALL
 612 _krb5_config_get_next (krb5_context context,
 613                        const krb5_config_section *c,
 614                        const krb5_config_binding **pointer,
 615                        int type,
 616                        ...)
 617 {
 618     const char *ret;
 619     va_list args;
 620
 621     va_start(args, type);
 622     ret = _krb5_config_vget_next (context, c, pointer, type, args);
 623     va_end(args);
 624     return ret;
 625 }
 626
 627 static const void *
 628 vget_next(krb5_context context,
 629           const krb5_config_binding *b,
 630           const krb5_config_binding **pointer,
 631           int type,
 632           const char *name,
 633           va_list args)
 634 {
 635     const char *p = va_arg(args, const char *);
 636     while(b != NULL) {
 637         if(strcmp(b->name, name) == 0) {
 638             if(b->type == type && p == NULL) {
 639                 *pointer = b;
 640                 return b->u.generic;
 641             } else if(b->type == krb5_config_list && p != NULL) {
 642                 return vget_next(context, b->u.list, pointer, type, p, args);
 643             }
 644         }
 645         b = b->next;
 646     }
 647     return NULL;
 648 }
 649
 650 KRB5_LIB_FUNCTION const void * KRB5_LIB_CALL
 651 _krb5_config_vget_next (krb5_context context,
 652                         const krb5_config_section *c,
 653                         const krb5_config_binding **pointer,
 654                         int type,
 655                         va_list args)
 656 {
 657     const krb5_config_binding *b;
 658     const char *p;
 659
 660     if(c == NULL)
 661         c = context->cf;
 662
 663     if (c == NULL)
 664         return NULL;
 665
 666     if (*pointer == NULL) {
 667         /* first time here, walk down the tree looking for the right
 668            section */
 669         p = va_arg(args, const char *);
 670         if (p == NULL)
 671             return NULL;
 672         return vget_next(context, c, pointer, type, p, args);
 673     }
 674
 675     /* we were called again, so just look for more entries with the
 676        same name and type */
 677     for (b = (*pointer)->next; b != NULL; b = b->next) {
 678         if(strcmp(b->name, (*pointer)->name) == 0 && b->type == type) {
 679             *pointer = b;
 680             return b->u.generic;
 681         }
 682     }
 683     return NULL;
 684 }
 685
 686 KRB5_LIB_FUNCTION const void * KRB5_LIB_CALL
 687 _krb5_config_get (krb5_context context,
 688                   const krb5_config_section *c,
 689                   int type,
 690                   ...)
 691 {
 692     const void *ret;
 693     va_list args;
 694
 695     va_start(args, type);
 696     ret = _krb5_config_vget (context, c, type, args);
 697     va_end(args);
 698     return ret;
 699 }
 700
 701
 702 const void *
 703 _krb5_config_vget (krb5_context context,
 704                    const krb5_config_section *c,
 705                    int type,
 706                    va_list args)
 707 {
 708     const krb5_config_binding *foo = NULL;
 709
 710     return _krb5_config_vget_next (context, c, &foo, type, args);
 711 }
 712
 713 /**
 714  * Get a list of configuration binding list for more processing
 715  *
 716  * @param context A Kerberos 5 context.
 717  * @param c a configuration section, or NULL to use the section from context
 718  * @param ... a list of names, terminated with NULL.
 719  *
 720  * @return NULL if configuration list is not found, a list otherwise
 721  *
 722  * @ingroup krb5_support
 723  */
 724
 725 KRB5_LIB_FUNCTION const krb5_config_binding * KRB5_LIB_CALL
 726 krb5_config_get_list (krb5_context context,
 727                       const krb5_config_section *c,
 728                       ...)
 729 {
 730     const krb5_config_binding *ret;
 731     va_list args;
 732
 733     va_start(args, c);
 734     ret = krb5_config_vget_list (context, c, args);
 735     va_end(args);
 736     return ret;
 737 }
 738
 739 /**
 740  * Get a list of configuration binding list for more processing
 741  *
 742  * @param context A Kerberos 5 context.
 743  * @param c a configuration section, or NULL to use the section from context
 744  * @param args a va_list of arguments
 745  *
 746  * @return NULL if configuration list is not found, a list otherwise
 747  *
 748  * @ingroup krb5_support
 749  */
 750
 751 KRB5_LIB_FUNCTION const krb5_config_binding * KRB5_LIB_CALL
 752 krb5_config_vget_list (krb5_context context,
 753                        const krb5_config_section *c,
 754                        va_list args)
 755 {
 756     return _krb5_config_vget (context, c, krb5_config_list, args);
 757 }
 758
 759 /**
 760  * Returns a "const char *" to a string in the configuration database.
 761  * The string may not be valid after a reload of the configuration
 762  * database so a caller should make a local copy if it needs to keep
 763  * the string.
 764  *
 765  * @param context A Kerberos 5 context.
 766  * @param c a configuration section, or NULL to use the section from context
 767  * @param ... a list of names, terminated with NULL.
 768  *
 769  * @return NULL if configuration string not found, a string otherwise
 770  *
 771  * @ingroup krb5_support
 772  */
 773
 774 KRB5_LIB_FUNCTION const char* KRB5_LIB_CALL
 775 krb5_config_get_string (krb5_context context,
 776                         const krb5_config_section *c,
 777                         ...)
 778 {
 779     const char *ret;
 780     va_list args;
 781
 782     va_start(args, c);
 783     ret = krb5_config_vget_string (context, c, args);
 784     va_end(args);
 785     return ret;
 786 }
 787
 788 /**
 789  * Like krb5_config_get_string(), but uses a va_list instead of ...
 790  *
 791  * @param context A Kerberos 5 context.
 792  * @param c a configuration section, or NULL to use the section from context
 793  * @param args a va_list of arguments
 794  *
 795  * @return NULL if configuration string not found, a string otherwise
 796  *
 797  * @ingroup krb5_support
 798  */
 799
 800 KRB5_LIB_FUNCTION const char* KRB5_LIB_CALL
 801 krb5_config_vget_string (krb5_context context,
 802                          const krb5_config_section *c,
 803                          va_list args)
 804 {
 805     return _krb5_config_vget (context, c, krb5_config_string, args);
 806 }
 807
 808 /**
 809  * Like krb5_config_vget_string(), but instead of returning NULL,
 810  * instead return a default value.
 811  *
 812  * @param context A Kerberos 5 context.
 813  * @param c a configuration section, or NULL to use the section from context
 814  * @param def_value the default value to return if no configuration
 815  *        found in the database.
 816  * @param args a va_list of arguments
 817  *
 818  * @return a configuration string
 819  *
 820  * @ingroup krb5_support
 821  */
 822
 823 KRB5_LIB_FUNCTION const char* KRB5_LIB_CALL
 824 krb5_config_vget_string_default (krb5_context context,
 825                                  const krb5_config_section *c,
 826                                  const char *def_value,
 827                                  va_list args)
 828 {
 829     const char *ret;
 830
 831     ret = krb5_config_vget_string (context, c, args);
 832     if (ret == NULL)
 833         ret = def_value;
 834     return ret;
 835 }
 836
 837 /**
 838  * Like krb5_config_get_string(), but instead of returning NULL,
 839  * instead return a default value.
 840  *
 841  * @param context A Kerberos 5 context.
 842  * @param c a configuration section, or NULL to use the section from context
 843  * @param def_value the default value to return if no configuration
 844  *        found in the database.
 845  * @param ... a list of names, terminated with NULL.
 846  *
 847  * @return a configuration string
 848  *
 849  * @ingroup krb5_support
 850  */
 851
 852 KRB5_LIB_FUNCTION const char* KRB5_LIB_CALL
 853 krb5_config_get_string_default (krb5_context context,
 854                                 const krb5_config_section *c,
 855                                 const char *def_value,
 856                                 ...)
 857 {
 858     const char *ret;
 859     va_list args;
 860
 861     va_start(args, def_value);
 862     ret = krb5_config_vget_string_default (context, c, def_value, args);
 863     va_end(args);
 864     return ret;
 865 }
 866
 867 /**
 868  * Get a list of configuration strings, free the result with
 869  * krb5_config_free_strings().
 870  *
 871  * @param context A Kerberos 5 context.
 872  * @param c a configuration section, or NULL to use the section from context
 873  * @param args a va_list of arguments
 874  *
 875  * @return TRUE or FALSE
 876  *
 877  * @ingroup krb5_support
 878  */
 879
 880 KRB5_LIB_FUNCTION char ** KRB5_LIB_CALL
 881 krb5_config_vget_strings(krb5_context context,
 882                          const krb5_config_section *c,
 883                          va_list args)
 884 {
 885     char **strings = NULL;
 886     int nstr = 0;
 887     const krb5_config_binding *b = NULL;
 888     const char *p;
 889
 890     while((p = _krb5_config_vget_next(context, c, &b,
 891                                       krb5_config_string, args))) {
 892         char *tmp = strdup(p);
 893         char *pos = NULL;
 894         char *s;
 895         if(tmp == NULL)
 896             goto cleanup;
 897         s = strtok_r(tmp, " \t", &pos);
 898         while(s){
 899             char **tmp2 = realloc(strings, (nstr + 1) * sizeof(*strings));
 900             if(tmp2 == NULL)
 901                 goto cleanup;
 902             strings = tmp2;
 903             strings[nstr] = strdup(s);
 904             nstr++;
 905             if(strings[nstr-1] == NULL)
 906                 goto cleanup;
 907             s = strtok_r(NULL, " \t", &pos);
 908         }
 909         free(tmp);
 910     }
 911     if(nstr){
 912         char **tmp = realloc(strings, (nstr + 1) * sizeof(*strings));
 913         if(tmp == NULL)
 914             goto cleanup;
 915         strings = tmp;
 916         strings[nstr] = NULL;
 917     }
 918     return strings;
 919 cleanup:
 920     while(nstr--)
 921         free(strings[nstr]);
 922     free(strings);
 923     return NULL;
 924
 925 }
 926
 927 /**
 928  * Get a list of configuration strings, free the result with
 929  * krb5_config_free_strings().
 930  *
 931  * @param context A Kerberos 5 context.
 932  * @param c a configuration section, or NULL to use the section from context
 933  * @param ... a list of names, terminated with NULL.
 934  *
 935  * @return TRUE or FALSE
 936  *
 937  * @ingroup krb5_support
 938  */
 939
 940 KRB5_LIB_FUNCTION char** KRB5_LIB_CALL
 941 krb5_config_get_strings(krb5_context context,
 942                         const krb5_config_section *c,
 943                         ...)
 944 {
 945     va_list ap;
 946     char **ret;
 947     va_start(ap, c);
 948     ret = krb5_config_vget_strings(context, c, ap);
 949     va_end(ap);
 950     return ret;
 951 }
 952
 953 /**
 954  * Free the resulting strings from krb5_config-get_strings() and
 955  * krb5_config_vget_strings().
 956  *
 957  * @param strings strings to free
 958  *
 959  * @ingroup krb5_support
 960  */
 961
 962 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
 963 krb5_config_free_strings(char **strings)
 964 {
 965     char **s = strings;
 966     while(s && *s){
 967         free(*s);
 968         s++;
 969     }
 970     free(strings);
 971 }
 972
 973 /**
 974  * Like krb5_config_get_bool_default() but with a va_list list of
 975  * configuration selection.
 976  *
 977  * Configuration value to a boolean value, where yes/true and any
 978  * non-zero number means TRUE and other value is FALSE.
 979  *
 980  * @param context A Kerberos 5 context.
 981  * @param c a configuration section, or NULL to use the section from context
 982  * @param def_value the default value to return if no configuration
 983  *        found in the database.
 984  * @param args a va_list of arguments
 985  *
 986  * @return TRUE or FALSE
 987  *
 988  * @ingroup krb5_support
 989  */
 990
 991 KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
 992 krb5_config_vget_bool_default (krb5_context context,
 993                                const krb5_config_section *c,
 994                                krb5_boolean def_value,
 995                                va_list args)
 996 {
 997     const char *str;
 998     str = krb5_config_vget_string (context, c, args);
 999     if(str == NULL)
1000         return def_value;
1001     if(strcasecmp(str, "yes") == 0 ||
1002        strcasecmp(str, "true") == 0 ||
1003        atoi(str)) return TRUE;
1004     return FALSE;
1005 }
1006
1007 /**
1008  * krb5_config_get_bool() will convert the configuration
1009  * option value to a boolean value, where yes/true and any non-zero
1010  * number means TRUE and other value is FALSE.
1011  *
1012  * @param context A Kerberos 5 context.
1013  * @param c a configuration section, or NULL to use the section from context
1014  * @param args a va_list of arguments
1015  *
1016  * @return TRUE or FALSE
1017  *
1018  * @ingroup krb5_support
1019  */
1020
1021 KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
1022 krb5_config_vget_bool  (krb5_context context,
1023                         const krb5_config_section *c,
1024                         va_list args)
1025 {
1026     return krb5_config_vget_bool_default (context, c, FALSE, args);
1027 }
1028
1029 /**
1030  * krb5_config_get_bool_default() will convert the configuration
1031  * option value to a boolean value, where yes/true and any non-zero
1032  * number means TRUE and other value is FALSE.
1033  *
1034  * @param context A Kerberos 5 context.
1035  * @param c a configuration section, or NULL to use the section from context
1036  * @param def_value the default value to return if no configuration
1037  *        found in the database.
1038  * @param ... a list of names, terminated with NULL.
1039  *
1040  * @return TRUE or FALSE
1041  *
1042  * @ingroup krb5_support
1043  */
1044
1045 KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
1046 krb5_config_get_bool_default (krb5_context context,
1047                               const krb5_config_section *c,
1048                               krb5_boolean def_value,
1049                               ...)
1050 {
1051     va_list ap;
1052     krb5_boolean ret;
1053     va_start(ap, def_value);
1054     ret = krb5_config_vget_bool_default(context, c, def_value, ap);
1055     va_end(ap);
1056     return ret;
1057 }
1058
1059 /**
1060  * Like krb5_config_get_bool() but with a va_list list of
1061  * configuration selection.
1062  *
1063  * Configuration value to a boolean value, where yes/true and any
1064  * non-zero number means TRUE and other value is FALSE.
1065  *
1066  * @param context A Kerberos 5 context.
1067  * @param c a configuration section, or NULL to use the section from context
1068  * @param ... a list of names, terminated with NULL.
1069  *
1070  * @return TRUE or FALSE
1071  *
1072  * @ingroup krb5_support
1073  */
1074
1075 KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
1076 krb5_config_get_bool (krb5_context context,
1077                       const krb5_config_section *c,
1078                       ...)
1079 {
1080     va_list ap;
1081     krb5_boolean ret;
1082     va_start(ap, c);
1083     ret = krb5_config_vget_bool (context, c, ap);
1084     va_end(ap);
1085     return ret;
1086 }
1087
1088 /**
1089  * Get the time from the configuration file using a relative time.
1090  *
1091  * Like krb5_config_get_time_default() but with a va_list list of
1092  * configuration selection.
1093  *
1094  * @param context A Kerberos 5 context.
1095  * @param c a configuration section, or NULL to use the section from context
1096  * @param def_value the default value to return if no configuration
1097  *        found in the database.
1098  * @param args a va_list of arguments
1099  *
1100  * @return parsed the time (or def_value on parse error)
1101  *
1102  * @ingroup krb5_support
1103  */
1104
1105 KRB5_LIB_FUNCTION int KRB5_LIB_CALL
1106 krb5_config_vget_time_default (krb5_context context,
1107                                const krb5_config_section *c,
1108                                int def_value,
1109                                va_list args)
1110 {
1111     const char *str;
1112     krb5_deltat t;
1113
1114     str = krb5_config_vget_string (context, c, args);
1115     if(str == NULL)
1116         return def_value;
1117     if (krb5_string_to_deltat(str, &t))
1118         return def_value;
1119     return t;
1120 }
1121
1122 /**
1123  * Get the time from the configuration file using a relative time, for example: 1h30s
1124  *
1125  * @param context A Kerberos 5 context.
1126  * @param c a configuration section, or NULL to use the section from context
1127  * @param args a va_list of arguments
1128  *
1129  * @return parsed the time or -1 on error
1130  *
1131  * @ingroup krb5_support
1132  */
1133
1134 KRB5_LIB_FUNCTION int KRB5_LIB_CALL
1135 krb5_config_vget_time  (krb5_context context,
1136                         const krb5_config_section *c,
1137                         va_list args)
1138 {
1139     return krb5_config_vget_time_default (context, c, -1, args);
1140 }
1141
1142 /**
1143  * Get the time from the configuration file using a relative time, for example: 1h30s
1144  *
1145  * @param context A Kerberos 5 context.
1146  * @param c a configuration section, or NULL to use the section from context
1147  * @param def_value the default value to return if no configuration
1148  *        found in the database.
1149  * @param ... a list of names, terminated with NULL.
1150  *
1151  * @return parsed the time (or def_value on parse error)
1152  *
1153  * @ingroup krb5_support
1154  */
1155
1156 KRB5_LIB_FUNCTION int KRB5_LIB_CALL
1157 krb5_config_get_time_default (krb5_context context,
1158                               const krb5_config_section *c,
1159                               int def_value,
1160                               ...)
1161 {
1162     va_list ap;
1163     int ret;
1164     va_start(ap, def_value);
1165     ret = krb5_config_vget_time_default(context, c, def_value, ap);
1166     va_end(ap);
1167     return ret;
1168 }
1169
1170 /**
1171  * Get the time from the configuration file using a relative time, for example: 1h30s
1172  *
1173  * @param context A Kerberos 5 context.
1174  * @param c a configuration section, or NULL to use the section from context
1175  * @param ... a list of names, terminated with NULL.
1176  *
1177  * @return parsed the time or -1 on error
1178  *
1179  * @ingroup krb5_support
1180  */
1181
1182 KRB5_LIB_FUNCTION int KRB5_LIB_CALL
1183 krb5_config_get_time (krb5_context context,
1184                       const krb5_config_section *c,
1185                       ...)
1186 {
1187     va_list ap;
1188     int ret;
1189     va_start(ap, c);
1190     ret = krb5_config_vget_time (context, c, ap);
1191     va_end(ap);
1192     return ret;
1193 }
1194
1195
1196 KRB5_LIB_FUNCTION int KRB5_LIB_CALL
1197 krb5_config_vget_int_default (krb5_context context,
1198                               const krb5_config_section *c,
1199                               int def_value,
1200                               va_list args)
1201 {
1202     const char *str;
1203     str = krb5_config_vget_string (context, c, args);
1204     if(str == NULL)
1205         return def_value;
1206     else {
1207         char *endptr;
1208         long l;
1209         l = strtol(str, &endptr, 0);
1210         if (endptr == str)
1211             return def_value;
1212         else
1213             return l;
1214     }
1215 }
1216
1217 KRB5_LIB_FUNCTION int KRB5_LIB_CALL
1218 krb5_config_vget_int  (krb5_context context,
1219                        const krb5_config_section *c,
1220                        va_list args)
1221 {
1222     return krb5_config_vget_int_default (context, c, -1, args);
1223 }
1224
1225 KRB5_LIB_FUNCTION int KRB5_LIB_CALL
1226 krb5_config_get_int_default (krb5_context context,
1227                              const krb5_config_section *c,
1228                              int def_value,
1229                              ...)
1230 {
1231     va_list ap;
1232     int ret;
1233     va_start(ap, def_value);
1234     ret = krb5_config_vget_int_default(context, c, def_value, ap);
1235     va_end(ap);
1236     return ret;
1237 }
1238
1239 KRB5_LIB_FUNCTION int KRB5_LIB_CALL
1240 krb5_config_get_int (krb5_context context,
1241                      const krb5_config_section *c,
1242                      ...)
1243 {
1244     va_list ap;
1245     int ret;
1246     va_start(ap, c);
1247     ret = krb5_config_vget_int (context, c, ap);
1248     va_end(ap);
1249     return ret;
1250 }
1251
1252
1253 #ifndef HEIMDAL_SMALLER
1254
1255 /**
1256  * Deprecated: configuration files are not strings
1257  *
1258  * @ingroup krb5_deprecated
1259  */
1260
1261 KRB5_DEPRECATED
1262 krb5_error_code KRB5_LIB_FUNCTION
1263 krb5_config_parse_string_multi(krb5_context context,
1264                                const char *string,
1265                                krb5_config_section **res)
1266 {
1267     const char *str;
1268     unsigned lineno = 0;
1269     krb5_error_code ret;
1270     struct fileptr f;
1271     f.f = NULL;
1272     f.s = string;
1273
1274     ret = krb5_config_parse_debug (&f, res, &lineno, &str);
1275     if (ret) {
1276         krb5_set_error_message (context, ret, "%s:%u: %s",
1277                                 "<constant>", lineno, str);
1278         return ret;
1279     }
1280     return 0;
1281 }
1282
1283 #endif