crypto/conf/conf_def.c

   1 /*
   2  * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 /* Part of the code in here was originally in conf.c, which is now removed */
  11
  12 #include <stdio.h>
  13 #include <string.h>
  14 #include "internal/cryptlib.h"
  15 #include "internal/o_dir.h"
  16 #include <openssl/lhash.h>
  17 #include <openssl/conf.h>
  18 #include <openssl/conf_api.h>
  19 #include "conf_def.h"
  20 #include <openssl/buffer.h>
  21 #include <openssl/err.h>
  22 #ifndef OPENSSL_NO_POSIX_IO
  23 # include <sys/stat.h>
  24 # ifdef _WIN32
  25 #  define stat    _stat
  26 #  define strcasecmp _stricmp
  27 # endif
  28 #endif
  29
  30 #ifndef S_ISDIR
  31 # define S_ISDIR(a) (((a) & S_IFMT) == S_IFDIR)
  32 #endif
  33
  34 /*
  35  * The maximum length we can grow a value to after variable expansion. 64k
  36  * should be more than enough for all reasonable uses.
  37  */
  38 #define MAX_CONF_VALUE_LENGTH       65536
  39
  40 static int is_keytype(const CONF *conf, char c, unsigned short type);
  41 static char *eat_ws(CONF *conf, char *p);
  42 static void trim_ws(CONF *conf, char *start);
  43 static char *eat_alpha_numeric(CONF *conf, char *p);
  44 static void clear_comments(CONF *conf, char *p);
  45 static int str_copy(CONF *conf, char *section, char **to, char *from);
  46 static char *scan_quote(CONF *conf, char *p);
  47 static char *scan_dquote(CONF *conf, char *p);
  48 #define scan_esc(conf,p)        (((IS_EOF((conf),(p)[1]))?((p)+1):((p)+2)))
  49 #ifndef OPENSSL_NO_POSIX_IO
  50 static BIO *process_include(char *include, OPENSSL_DIR_CTX **dirctx,
  51                             char **dirpath);
  52 static BIO *get_next_file(const char *path, OPENSSL_DIR_CTX **dirctx);
  53 #endif
  54
  55 static CONF *def_create(CONF_METHOD *meth);
  56 static int def_init_default(CONF *conf);
  57 static int def_init_WIN32(CONF *conf);
  58 static int def_destroy(CONF *conf);
  59 static int def_destroy_data(CONF *conf);
  60 static int def_load(CONF *conf, const char *name, long *eline);
  61 static int def_load_bio(CONF *conf, BIO *bp, long *eline);
  62 static int def_dump(const CONF *conf, BIO *bp);
  63 static int def_is_number(const CONF *conf, char c);
  64 static int def_to_int(const CONF *conf, char c);
  65
  66 static CONF_METHOD default_method = {
  67     "OpenSSL default",
  68     def_create,
  69     def_init_default,
  70     def_destroy,
  71     def_destroy_data,
  72     def_load_bio,
  73     def_dump,
  74     def_is_number,
  75     def_to_int,
  76     def_load
  77 };
  78
  79 static CONF_METHOD WIN32_method = {
  80     "WIN32",
  81     def_create,
  82     def_init_WIN32,
  83     def_destroy,
  84     def_destroy_data,
  85     def_load_bio,
  86     def_dump,
  87     def_is_number,
  88     def_to_int,
  89     def_load
  90 };
  91
  92 CONF_METHOD *NCONF_default(void)
  93 {
  94     return &default_method;
  95 }
  96
  97 CONF_METHOD *NCONF_WIN32(void)
  98 {
  99     return &WIN32_method;
 100 }
 101
 102 static CONF *def_create(CONF_METHOD *meth)
 103 {
 104     CONF *ret;
 105
 106     ret = OPENSSL_malloc(sizeof(*ret));
 107     if (ret != NULL)
 108         if (meth->init(ret) == 0) {
 109             OPENSSL_free(ret);
 110             ret = NULL;
 111         }
 112     return ret;
 113 }
 114
 115 static int def_init_default(CONF *conf)
 116 {
 117     if (conf == NULL)
 118         return 0;
 119
 120     conf->meth = &default_method;
 121     conf->meth_data = (void *)CONF_type_default;
 122     conf->data = NULL;
 123
 124     return 1;
 125 }
 126
 127 static int def_init_WIN32(CONF *conf)
 128 {
 129     if (conf == NULL)
 130         return 0;
 131
 132     conf->meth = &WIN32_method;
 133     conf->meth_data = (void *)CONF_type_win32;
 134     conf->data = NULL;
 135
 136     return 1;
 137 }
 138
 139 static int def_destroy(CONF *conf)
 140 {
 141     if (def_destroy_data(conf)) {
 142         OPENSSL_free(conf);
 143         return 1;
 144     }
 145     return 0;
 146 }
 147
 148 static int def_destroy_data(CONF *conf)
 149 {
 150     if (conf == NULL)
 151         return 0;
 152     _CONF_free_data(conf);
 153     return 1;
 154 }
 155
 156 static int def_load(CONF *conf, const char *name, long *line)
 157 {
 158     int ret;
 159     BIO *in = NULL;
 160
 161 #ifdef OPENSSL_SYS_VMS
 162     in = BIO_new_file(name, "r");
 163 #else
 164     in = BIO_new_file(name, "rb");
 165 #endif
 166     if (in == NULL) {
 167         if (ERR_GET_REASON(ERR_peek_last_error()) == BIO_R_NO_SUCH_FILE)
 168             CONFerr(CONF_F_DEF_LOAD, CONF_R_NO_SUCH_FILE);
 169         else
 170             CONFerr(CONF_F_DEF_LOAD, ERR_R_SYS_LIB);
 171         return 0;
 172     }
 173
 174     ret = def_load_bio(conf, in, line);
 175     BIO_free(in);
 176
 177     return ret;
 178 }
 179
 180 static int def_load_bio(CONF *conf, BIO *in, long *line)
 181 {
 182 /* The macro BUFSIZE conflicts with a system macro in VxWorks */
 183 #define CONFBUFSIZE     512
 184     int bufnum = 0, i, ii;
 185     BUF_MEM *buff = NULL;
 186     char *s, *p, *end;
 187     int again;
 188     long eline = 0;
 189     char btmp[DECIMAL_SIZE(eline) + 1];
 190     CONF_VALUE *v = NULL, *tv;
 191     CONF_VALUE *sv = NULL;
 192     char *section = NULL, *buf;
 193     char *start, *psection, *pname;
 194     void *h = (void *)(conf->data);
 195     STACK_OF(BIO) *biosk = NULL;
 196 #ifndef OPENSSL_NO_POSIX_IO
 197     char *dirpath = NULL;
 198     OPENSSL_DIR_CTX *dirctx = NULL;
 199 #endif
 200
 201     if ((buff = BUF_MEM_new()) == NULL) {
 202         CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_BUF_LIB);
 203         goto err;
 204     }
 205
 206     section = OPENSSL_strdup("default");
 207     if (section == NULL) {
 208         CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE);
 209         goto err;
 210     }
 211
 212     if (_CONF_new_data(conf) == 0) {
 213         CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE);
 214         goto err;
 215     }
 216
 217     sv = _CONF_new_section(conf, section);
 218     if (sv == NULL) {
 219         CONFerr(CONF_F_DEF_LOAD_BIO, CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
 220         goto err;
 221     }
 222
 223     bufnum = 0;
 224     again = 0;
 225     for (;;) {
 226         if (!BUF_MEM_grow(buff, bufnum + CONFBUFSIZE)) {
 227             CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_BUF_LIB);
 228             goto err;
 229         }
 230         p = &(buff->data[bufnum]);
 231         *p = '\0';
 232  read_retry:
 233         BIO_gets(in, p, CONFBUFSIZE - 1);
 234         p[CONFBUFSIZE - 1] = '\0';
 235         ii = i = strlen(p);
 236         if (i == 0 && !again) {
 237             /* the currently processed BIO is at EOF */
 238             BIO *parent;
 239
 240 #ifndef OPENSSL_NO_POSIX_IO
 241             /* continue processing with the next file from directory */
 242             if (dirctx != NULL) {
 243                 BIO *next;
 244
 245                 if ((next = get_next_file(dirpath, &dirctx)) != NULL) {
 246                     BIO_vfree(in);
 247                     in = next;
 248                     goto read_retry;
 249                 } else {
 250                     OPENSSL_free(dirpath);
 251                     dirpath = NULL;
 252                 }
 253             }
 254 #endif
 255             /* no more files in directory, continue with processing parent */
 256             if ((parent = sk_BIO_pop(biosk)) == NULL) {
 257                 /* everything processed get out of the loop */
 258                 break;
 259             } else {
 260                 BIO_vfree(in);
 261                 in = parent;
 262                 goto read_retry;
 263             }
 264         }
 265         again = 0;
 266         while (i > 0) {
 267             if ((p[i - 1] != '\r') && (p[i - 1] != '\n'))
 268                 break;
 269             else
 270                 i--;
 271         }
 272         /*
 273          * we removed some trailing stuff so there is a new line on the end.
 274          */
 275         if (ii && i == ii)
 276             again = 1;          /* long line */
 277         else {
 278             p[i] = '\0';
 279             eline++;            /* another input line */
 280         }
 281
 282         /* we now have a line with trailing \r\n removed */
 283
 284         /* i is the number of bytes */
 285         bufnum += i;
 286
 287         v = NULL;
 288         /* check for line continuation */
 289         if (bufnum >= 1) {
 290             /*
 291              * If we have bytes and the last char '\\' and second last char
 292              * is not '\\'
 293              */
 294             p = &(buff->data[bufnum - 1]);
 295             if (IS_ESC(conf, p[0]) && ((bufnum <= 1) || !IS_ESC(conf, p[-1]))) {
 296                 bufnum--;
 297                 again = 1;
 298             }
 299         }
 300         if (again)
 301             continue;
 302         bufnum = 0;
 303         buf = buff->data;
 304
 305         clear_comments(conf, buf);
 306         s = eat_ws(conf, buf);
 307         if (IS_EOF(conf, *s))
 308             continue;           /* blank line */
 309         if (*s == '[') {
 310             char *ss;
 311
 312             s++;
 313             start = eat_ws(conf, s);
 314             ss = start;
 315  again:
 316             end = eat_alpha_numeric(conf, ss);
 317             p = eat_ws(conf, end);
 318             if (*p != ']') {
 319                 if (*p != '\0' && ss != p) {
 320                     ss = p;
 321                     goto again;
 322                 }
 323                 CONFerr(CONF_F_DEF_LOAD_BIO,
 324                         CONF_R_MISSING_CLOSE_SQUARE_BRACKET);
 325                 goto err;
 326             }
 327             *end = '\0';
 328             if (!str_copy(conf, NULL, &section, start))
 329                 goto err;
 330             if ((sv = _CONF_get_section(conf, section)) == NULL)
 331                 sv = _CONF_new_section(conf, section);
 332             if (sv == NULL) {
 333                 CONFerr(CONF_F_DEF_LOAD_BIO,
 334                         CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
 335                 goto err;
 336             }
 337             continue;
 338         } else {
 339             pname = s;
 340             end = eat_alpha_numeric(conf, s);
 341             if ((end[0] == ':') && (end[1] == ':')) {
 342                 *end = '\0';
 343                 end += 2;
 344                 psection = pname;
 345                 pname = end;
 346                 end = eat_alpha_numeric(conf, end);
 347             } else {
 348                 psection = section;
 349             }
 350             p = eat_ws(conf, end);
 351             if (strncmp(pname, ".include", 8) == 0
 352                 && (p != pname + 8 || *p == '=')) {
 353                 char *include = NULL;
 354                 BIO *next;
 355
 356                 if (*p == '=') {
 357                     p++;
 358                     p = eat_ws(conf, p);
 359                 }
 360                 trim_ws(conf, p);
 361                 if (!str_copy(conf, psection, &include, p))
 362                     goto err;
 363                 /* get the BIO of the included file */
 364 #ifndef OPENSSL_NO_POSIX_IO
 365                 next = process_include(include, &dirctx, &dirpath);
 366                 if (include != dirpath) {
 367                     /* dirpath will contain include in case of a directory */
 368                     OPENSSL_free(include);
 369                 }
 370 #else
 371                 next = BIO_new_file(include, "r");
 372                 OPENSSL_free(include);
 373 #endif
 374                 if (next != NULL) {
 375                     /* push the currently processing BIO onto stack */
 376                     if (biosk == NULL) {
 377                         if ((biosk = sk_BIO_new_null()) == NULL) {
 378                             CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE);
 379                             goto err;
 380                         }
 381                     }
 382                     if (!sk_BIO_push(biosk, in)) {
 383                         CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE);
 384                         goto err;
 385                     }
 386                     /* continue with reading from the included BIO */
 387                     in = next;
 388                 }
 389                 continue;
 390             } else if (*p != '=') {
 391                 CONFerr(CONF_F_DEF_LOAD_BIO, CONF_R_MISSING_EQUAL_SIGN);
 392                 goto err;
 393             }
 394             *end = '\0';
 395             p++;
 396             start = eat_ws(conf, p);
 397             trim_ws(conf, start);
 398
 399             if ((v = OPENSSL_malloc(sizeof(*v))) == NULL) {
 400                 CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE);
 401                 goto err;
 402             }
 403             v->name = OPENSSL_strdup(pname);
 404             v->value = NULL;
 405             if (v->name == NULL) {
 406                 CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE);
 407                 goto err;
 408             }
 409             if (!str_copy(conf, psection, &(v->value), start))
 410                 goto err;
 411
 412             if (strcmp(psection, section) != 0) {
 413                 if ((tv = _CONF_get_section(conf, psection))
 414                     == NULL)
 415                     tv = _CONF_new_section(conf, psection);
 416                 if (tv == NULL) {
 417                     CONFerr(CONF_F_DEF_LOAD_BIO,
 418                             CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
 419                     goto err;
 420                 }
 421             } else
 422                 tv = sv;
 423             if (_CONF_add_string(conf, tv, v) == 0) {
 424                 CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE);
 425                 goto err;
 426             }
 427             v = NULL;
 428         }
 429     }
 430     BUF_MEM_free(buff);
 431     OPENSSL_free(section);
 432     /*
 433      * No need to pop, since we only get here if the stack is empty.
 434      * If this causes a BIO leak, THE ISSUE IS SOMEWHERE ELSE!
 435      */
 436     sk_BIO_free(biosk);
 437     return 1;
 438  err:
 439     BUF_MEM_free(buff);
 440     OPENSSL_free(section);
 441     /*
 442      * Since |in| is the first element of the stack and should NOT be freed
 443      * here, we cannot use sk_BIO_pop_free().  Instead, we pop and free one
 444      * BIO at a time, making sure that the last one popped isn't.
 445      */
 446     while (sk_BIO_num(biosk) > 0) {
 447         BIO *popped = sk_BIO_pop(biosk);
 448         BIO_vfree(in);
 449         in = popped;
 450     }
 451     sk_BIO_free(biosk);
 452 #ifndef OPENSSL_NO_POSIX_IO
 453     OPENSSL_free(dirpath);
 454     if (dirctx != NULL)
 455         OPENSSL_DIR_end(&dirctx);
 456 #endif
 457     if (line != NULL)
 458         *line = eline;
 459     BIO_snprintf(btmp, sizeof(btmp), "%ld", eline);
 460     ERR_add_error_data(2, "line ", btmp);
 461     if (h != conf->data) {
 462         CONF_free(conf->data);
 463         conf->data = NULL;
 464     }
 465     if (v != NULL) {
 466         OPENSSL_free(v->name);
 467         OPENSSL_free(v->value);
 468         OPENSSL_free(v);
 469     }
 470     return 0;
 471 }
 472
 473 static void clear_comments(CONF *conf, char *p)
 474 {
 475     for (;;) {
 476         if (IS_FCOMMENT(conf, *p)) {
 477             *p = '\0';
 478             return;
 479         }
 480         if (!IS_WS(conf, *p)) {
 481             break;
 482         }
 483         p++;
 484     }
 485
 486     for (;;) {
 487         if (IS_COMMENT(conf, *p)) {
 488             *p = '\0';
 489             return;
 490         }
 491         if (IS_DQUOTE(conf, *p)) {
 492             p = scan_dquote(conf, p);
 493             continue;
 494         }
 495         if (IS_QUOTE(conf, *p)) {
 496             p = scan_quote(conf, p);
 497             continue;
 498         }
 499         if (IS_ESC(conf, *p)) {
 500             p = scan_esc(conf, p);
 501             continue;
 502         }
 503         if (IS_EOF(conf, *p))
 504             return;
 505         else
 506             p++;
 507     }
 508 }
 509
 510 static int str_copy(CONF *conf, char *section, char **pto, char *from)
 511 {
 512     int q, r, rr = 0, to = 0, len = 0;
 513     char *s, *e, *rp, *p, *rrp, *np, *cp, v;
 514     BUF_MEM *buf;
 515
 516     if ((buf = BUF_MEM_new()) == NULL)
 517         return 0;
 518
 519     len = strlen(from) + 1;
 520     if (!BUF_MEM_grow(buf, len))
 521         goto err;
 522
 523     for (;;) {
 524         if (IS_QUOTE(conf, *from)) {
 525             q = *from;
 526             from++;
 527             while (!IS_EOF(conf, *from) && (*from != q)) {
 528                 if (IS_ESC(conf, *from)) {
 529                     from++;
 530                     if (IS_EOF(conf, *from))
 531                         break;
 532                 }
 533                 buf->data[to++] = *(from++);
 534             }
 535             if (*from == q)
 536                 from++;
 537         } else if (IS_DQUOTE(conf, *from)) {
 538             q = *from;
 539             from++;
 540             while (!IS_EOF(conf, *from)) {
 541                 if (*from == q) {
 542                     if (*(from + 1) == q) {
 543                         from++;
 544                     } else {
 545                         break;
 546                     }
 547                 }
 548                 buf->data[to++] = *(from++);
 549             }
 550             if (*from == q)
 551                 from++;
 552         } else if (IS_ESC(conf, *from)) {
 553             from++;
 554             v = *(from++);
 555             if (IS_EOF(conf, v))
 556                 break;
 557             else if (v == 'r')
 558                 v = '\r';
 559             else if (v == 'n')
 560                 v = '\n';
 561             else if (v == 'b')
 562                 v = '\b';
 563             else if (v == 't')
 564                 v = '\t';
 565             buf->data[to++] = v;
 566         } else if (IS_EOF(conf, *from))
 567             break;
 568         else if (*from == '$') {
 569             size_t newsize;
 570
 571             /* try to expand it */
 572             rrp = NULL;
 573             s = &(from[1]);
 574             if (*s == '{')
 575                 q = '}';
 576             else if (*s == '(')
 577                 q = ')';
 578             else
 579                 q = 0;
 580
 581             if (q)
 582                 s++;
 583             cp = section;
 584             e = np = s;
 585             while (IS_ALNUM(conf, *e))
 586                 e++;
 587             if ((e[0] == ':') && (e[1] == ':')) {
 588                 cp = np;
 589                 rrp = e;
 590                 rr = *e;
 591                 *rrp = '\0';
 592                 e += 2;
 593                 np = e;
 594                 while (IS_ALNUM(conf, *e))
 595                     e++;
 596             }
 597             r = *e;
 598             *e = '\0';
 599             rp = e;
 600             if (q) {
 601                 if (r != q) {
 602                     CONFerr(CONF_F_STR_COPY, CONF_R_NO_CLOSE_BRACE);
 603                     goto err;
 604                 }
 605                 e++;
 606             }
 607             /*-
 608              * So at this point we have
 609              * np which is the start of the name string which is
 610              *   '\0' terminated.
 611              * cp which is the start of the section string which is
 612              *   '\0' terminated.
 613              * e is the 'next point after'.
 614              * r and rr are the chars replaced by the '\0'
 615              * rp and rrp is where 'r' and 'rr' came from.
 616              */
 617             p = _CONF_get_string(conf, cp, np);
 618             if (rrp != NULL)
 619                 *rrp = rr;
 620             *rp = r;
 621             if (p == NULL) {
 622                 CONFerr(CONF_F_STR_COPY, CONF_R_VARIABLE_HAS_NO_VALUE);
 623                 goto err;
 624             }
 625             newsize = strlen(p) + buf->length - (e - from);
 626             if (newsize > MAX_CONF_VALUE_LENGTH) {
 627                 CONFerr(CONF_F_STR_COPY, CONF_R_VARIABLE_EXPANSION_TOO_LONG);
 628                 goto err;
 629             }
 630             if (!BUF_MEM_grow_clean(buf, newsize)) {
 631                 CONFerr(CONF_F_STR_COPY, ERR_R_MALLOC_FAILURE);
 632                 goto err;
 633             }
 634             while (*p)
 635                 buf->data[to++] = *(p++);
 636
 637             /*
 638              * Since we change the pointer 'from', we also have to change the
 639              * perceived length of the string it points at.  /RL
 640              */
 641             len -= e - from;
 642             from = e;
 643
 644             /*
 645              * In case there were no braces or parenthesis around the
 646              * variable reference, we have to put back the character that was
 647              * replaced with a '\0'.  /RL
 648              */
 649             *rp = r;
 650         } else
 651             buf->data[to++] = *(from++);
 652     }
 653     buf->data[to] = '\0';
 654     OPENSSL_free(*pto);
 655     *pto = buf->data;
 656     OPENSSL_free(buf);
 657     return 1;
 658  err:
 659     BUF_MEM_free(buf);
 660     return 0;
 661 }
 662
 663 #ifndef OPENSSL_NO_POSIX_IO
 664 /*
 665  * Check whether included path is a directory.
 666  * Returns next BIO to process and in case of a directory
 667  * also an opened directory context and the include path.
 668  */
 669 static BIO *process_include(char *include, OPENSSL_DIR_CTX **dirctx,
 670                             char **dirpath)
 671 {
 672     struct stat st;
 673     BIO *next;
 674
 675     if (stat(include, &st) < 0) {
 676         ERR_raise_data(ERR_LIB_SYS, errno,
 677                        "calling stat(%s)",
 678                        include);
 679         /* missing include file is not fatal error */
 680         return NULL;
 681     }
 682
 683     if (S_ISDIR(st.st_mode)) {
 684         if (*dirctx != NULL) {
 685             CONFerr(CONF_F_PROCESS_INCLUDE,
 686                     CONF_R_RECURSIVE_DIRECTORY_INCLUDE);
 687             ERR_add_error_data(1, include);
 688             return NULL;
 689         }
 690         /* a directory, load its contents */
 691         if ((next = get_next_file(include, dirctx)) != NULL)
 692             *dirpath = include;
 693         return next;
 694     }
 695
 696     next = BIO_new_file(include, "r");
 697     return next;
 698 }
 699
 700 /*
 701  * Get next file from the directory path.
 702  * Returns BIO of the next file to read and updates dirctx.
 703  */
 704 static BIO *get_next_file(const char *path, OPENSSL_DIR_CTX **dirctx)
 705 {
 706     const char *filename;
 707
 708     while ((filename = OPENSSL_DIR_read(dirctx, path)) != NULL) {
 709         size_t namelen;
 710
 711         namelen = strlen(filename);
 712
 713
 714         if ((namelen > 5 && strcasecmp(filename + namelen - 5, ".conf") == 0)
 715             || (namelen > 4 && strcasecmp(filename + namelen - 4, ".cnf") == 0)) {
 716             size_t newlen;
 717             char *newpath;
 718             BIO *bio;
 719
 720             newlen = strlen(path) + namelen + 2;
 721             newpath = OPENSSL_zalloc(newlen);
 722             if (newpath == NULL) {
 723                 CONFerr(CONF_F_GET_NEXT_FILE, ERR_R_MALLOC_FAILURE);
 724                 break;
 725             }
 726 #ifdef OPENSSL_SYS_VMS
 727             /*
 728              * If the given path isn't clear VMS syntax,
 729              * we treat it as on Unix.
 730              */
 731             {
 732                 size_t pathlen = strlen(path);
 733
 734                 if (path[pathlen - 1] == ']' || path[pathlen - 1] == '>'
 735                     || path[pathlen - 1] == ':') {
 736                     /* Clear VMS directory syntax, just copy as is */
 737                     OPENSSL_strlcpy(newpath, path, newlen);
 738                 }
 739             }
 740 #endif
 741             if (newpath[0] == '\0') {
 742                 OPENSSL_strlcpy(newpath, path, newlen);
 743                 OPENSSL_strlcat(newpath, "/", newlen);
 744             }
 745             OPENSSL_strlcat(newpath, filename, newlen);
 746
 747             bio = BIO_new_file(newpath, "r");
 748             OPENSSL_free(newpath);
 749             /* Errors when opening files are non-fatal. */
 750             if (bio != NULL)
 751                 return bio;
 752         }
 753     }
 754     OPENSSL_DIR_end(dirctx);
 755     *dirctx = NULL;
 756     return NULL;
 757 }
 758 #endif
 759
 760 static int is_keytype(const CONF *conf, char c, unsigned short type)
 761 {
 762     const unsigned short * keytypes = (const unsigned short *) conf->meth_data;
 763     unsigned char key = (unsigned char)c;
 764
 765 #ifdef CHARSET_EBCDIC
 766 # if CHAR_BIT > 8
 767     if (key > 255) {
 768         /* key is out of range for os_toascii table */
 769         return 0;
 770     }
 771 # endif
 772     /* convert key from ebcdic to ascii */
 773     key = os_toascii[key];
 774 #endif
 775
 776     if (key > 127) {
 777         /* key is not a seven bit ascii character */
 778         return 0;
 779     }
 780
 781     return (keytypes[key] & type) ? 1 : 0;
 782 }
 783
 784 static char *eat_ws(CONF *conf, char *p)
 785 {
 786     while (IS_WS(conf, *p) && (!IS_EOF(conf, *p)))
 787         p++;
 788     return p;
 789 }
 790
 791 static void trim_ws(CONF *conf, char *start)
 792 {
 793     char *p = start;
 794
 795     while (!IS_EOF(conf, *p))
 796         p++;
 797     p--;
 798     while ((p >= start) && IS_WS(conf, *p))
 799         p--;
 800     p++;
 801     *p = '\0';
 802 }
 803
 804 static char *eat_alpha_numeric(CONF *conf, char *p)
 805 {
 806     for (;;) {
 807         if (IS_ESC(conf, *p)) {
 808             p = scan_esc(conf, p);
 809             continue;
 810         }
 811         if (!IS_ALNUM_PUNCT(conf, *p))
 812             return p;
 813         p++;
 814     }
 815 }
 816
 817 static char *scan_quote(CONF *conf, char *p)
 818 {
 819     int q = *p;
 820
 821     p++;
 822     while (!(IS_EOF(conf, *p)) && (*p != q)) {
 823         if (IS_ESC(conf, *p)) {
 824             p++;
 825             if (IS_EOF(conf, *p))
 826                 return p;
 827         }
 828         p++;
 829     }
 830     if (*p == q)
 831         p++;
 832     return p;
 833 }
 834
 835 static char *scan_dquote(CONF *conf, char *p)
 836 {
 837     int q = *p;
 838
 839     p++;
 840     while (!(IS_EOF(conf, *p))) {
 841         if (*p == q) {
 842             if (*(p + 1) == q) {
 843                 p++;
 844             } else {
 845                 break;
 846             }
 847         }
 848         p++;
 849     }
 850     if (*p == q)
 851         p++;
 852     return p;
 853 }
 854
 855 static void dump_value_doall_arg(const CONF_VALUE *a, BIO *out)
 856 {
 857     if (a->name)
 858         BIO_printf(out, "[%s] %s=%s\n", a->section, a->name, a->value);
 859     else
 860         BIO_printf(out, "[[%s]]\n", a->section);
 861 }
 862
 863 IMPLEMENT_LHASH_DOALL_ARG_CONST(CONF_VALUE, BIO);
 864
 865 static int def_dump(const CONF *conf, BIO *out)
 866 {
 867     lh_CONF_VALUE_doall_BIO(conf->data, dump_value_doall_arg, out);
 868     return 1;
 869 }
 870
 871 static int def_is_number(const CONF *conf, char c)
 872 {
 873     return IS_NUMBER(conf, c);
 874 }
 875
 876 static int def_to_int(const CONF *conf, char c)
 877 {
 878     return c - '0';
 879 }