1 /*
2 * Copyright 1995-2024 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/e_os.h" /* struct stat */
15 #ifdef __TANDEM
16 #include <sys/types.h> /* needed for stat.h */
17 #include <sys/stat.h> /* struct stat */
18 #endif
19 #include "internal/cryptlib.h"
20 #include "internal/o_dir.h"
21 #include <openssl/lhash.h>
22 #include <openssl/conf.h>
23 #include <openssl/conf_api.h>
24 #include "conf_local.h"
25 #include "conf_def.h"
26 #include <openssl/buffer.h>
27 #include <openssl/err.h>
28 #ifndef OPENSSL_NO_POSIX_IO
29 #include <sys/stat.h>
30 #ifdef _WIN32
31 #define stat _stat
32 #endif
33 #endif
34
35 #ifndef S_ISDIR
36 #define S_ISDIR(a) (((a) & S_IFMT) == S_IFDIR)
37 #endif
38
39 /*
40 * The maximum length we can grow a value to after variable expansion. 64k
41 * should be more than enough for all reasonable uses.
42 */
43 #define MAX_CONF_VALUE_LENGTH 65536
44
45 static int is_keytype(const CONF *conf, char c, unsigned short type);
46 static char *eat_ws(CONF *conf, char *p);
47 static void trim_ws(CONF *conf, char *start);
48 static char *eat_alpha_numeric(CONF *conf, char *p);
49 static void clear_comments(CONF *conf, char *p);
50 static int str_copy(CONF *conf, char *section, char **to, char *from);
51 static char *scan_quote(CONF *conf, char *p);
52 static char *scan_dquote(CONF *conf, char *p);
53 #define scan_esc(conf, p) (((IS_EOF((conf), (p)[1])) ? ((p) + 1) : ((p) + 2)))
54 #ifndef OPENSSL_NO_POSIX_IO
55 static BIO *process_include(char *include, OPENSSL_DIR_CTX **dirctx,
56 char **dirpath);
57 static BIO *get_next_file(const char *path, OPENSSL_DIR_CTX **dirctx);
58 #endif
59
60 static CONF *def_create(CONF_METHOD *meth);
61 static int def_init_default(CONF *conf);
62 #ifndef OPENSSL_NO_DEPRECATED_3_0
63 static int def_init_WIN32(CONF *conf);
64 #endif
65 static int def_destroy(CONF *conf);
66 static int def_destroy_data(CONF *conf);
67 static int def_load(CONF *conf, const char *name, long *eline);
68 static int def_load_bio(CONF *conf, BIO *bp, long *eline);
69 static int def_dump(const CONF *conf, BIO *bp);
70 static int def_is_number(const CONF *conf, char c);
71 static int def_to_int(const CONF *conf, char c);
72
73 static CONF_METHOD default_method = {
74 "OpenSSL default",
75 def_create,
76 def_init_default,
77 def_destroy,
78 def_destroy_data,
79 def_load_bio,
80 def_dump,
81 def_is_number,
82 def_to_int,
83 def_load
84 };
85
NCONF_default(void)86 CONF_METHOD *NCONF_default(void)
87 {
88 return &default_method;
89 }
90
91 #ifndef OPENSSL_NO_DEPRECATED_3_0
92 static CONF_METHOD WIN32_method = {
93 "WIN32",
94 def_create,
95 def_init_WIN32,
96 def_destroy,
97 def_destroy_data,
98 def_load_bio,
99 def_dump,
100 def_is_number,
101 def_to_int,
102 def_load
103 };
104
NCONF_WIN32(void)105 CONF_METHOD *NCONF_WIN32(void)
106 {
107 return &WIN32_method;
108 }
109 #endif
110
def_create(CONF_METHOD * meth)111 static CONF *def_create(CONF_METHOD *meth)
112 {
113 CONF *ret;
114
115 ret = OPENSSL_malloc(sizeof(*ret));
116 if (ret != NULL)
117 if (meth->init(ret) == 0) {
118 OPENSSL_free(ret);
119 ret = NULL;
120 }
121 return ret;
122 }
123
def_init_default(CONF * conf)124 static int def_init_default(CONF *conf)
125 {
126 if (conf == NULL)
127 return 0;
128
129 memset(conf, 0, sizeof(*conf));
130 conf->meth = &default_method;
131 conf->meth_data = (void *)CONF_type_default;
132
133 return 1;
134 }
135
136 #ifndef OPENSSL_NO_DEPRECATED_3_0
def_init_WIN32(CONF * conf)137 static int def_init_WIN32(CONF *conf)
138 {
139 if (conf == NULL)
140 return 0;
141
142 memset(conf, 0, sizeof(*conf));
143 conf->meth = &WIN32_method;
144 conf->meth_data = (void *)CONF_type_win32;
145
146 return 1;
147 }
148 #endif
149
def_destroy(CONF * conf)150 static int def_destroy(CONF *conf)
151 {
152 if (def_destroy_data(conf)) {
153 OPENSSL_free(conf);
154 return 1;
155 }
156 return 0;
157 }
158
def_destroy_data(CONF * conf)159 static int def_destroy_data(CONF *conf)
160 {
161 if (conf == NULL)
162 return 0;
163 _CONF_free_data(conf);
164 return 1;
165 }
166
def_load(CONF * conf,const char * name,long * line)167 static int def_load(CONF *conf, const char *name, long *line)
168 {
169 int ret;
170 BIO *in = NULL;
171
172 #ifdef OPENSSL_SYS_VMS
173 in = BIO_new_file(name, "r");
174 #else
175 in = BIO_new_file(name, "rb");
176 #endif
177 if (in == NULL) {
178 if (ERR_GET_REASON(ERR_peek_last_error()) == BIO_R_NO_SUCH_FILE)
179 ERR_raise(ERR_LIB_CONF, CONF_R_NO_SUCH_FILE);
180 else
181 ERR_raise(ERR_LIB_CONF, ERR_R_SYS_LIB);
182 return 0;
183 }
184
185 ret = def_load_bio(conf, in, line);
186 BIO_free(in);
187
188 return ret;
189 }
190
191 /* Parse a boolean value and fill in *flag. Return 0 on error. */
parsebool(const char * pval,int * flag)192 static int parsebool(const char *pval, int *flag)
193 {
194 if (OPENSSL_strcasecmp(pval, "on") == 0
195 || OPENSSL_strcasecmp(pval, "true") == 0) {
196 *flag = 1;
197 } else if (OPENSSL_strcasecmp(pval, "off") == 0
198 || OPENSSL_strcasecmp(pval, "false") == 0) {
199 *flag = 0;
200 } else {
201 ERR_raise(ERR_LIB_CONF, CONF_R_INVALID_PRAGMA);
202 return 0;
203 }
204 return 1;
205 }
206
def_load_bio(CONF * conf,BIO * in,long * line)207 static int def_load_bio(CONF *conf, BIO *in, long *line)
208 {
209 /* The macro BUFSIZE conflicts with a system macro in VxWorks */
210 #define CONFBUFSIZE 512
211 int bufnum = 0, i, ii;
212 BUF_MEM *buff = NULL;
213 char *s, *p, *end;
214 int again;
215 int first_call = 1;
216 long eline = 0;
217 char btmp[DECIMAL_SIZE(eline) + 1];
218 CONF_VALUE *v = NULL, *tv;
219 CONF_VALUE *sv = NULL;
220 char *section = NULL, *buf;
221 char *start, *psection, *pname;
222 void *h = (void *)(conf->data);
223 STACK_OF(BIO) *biosk = NULL;
224 #ifndef OPENSSL_NO_POSIX_IO
225 char *dirpath = NULL;
226 OPENSSL_DIR_CTX *dirctx = NULL;
227 #endif
228 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
229 int numincludes = 0;
230 #endif
231
232 if ((buff = BUF_MEM_new()) == NULL) {
233 ERR_raise(ERR_LIB_CONF, ERR_R_BUF_LIB);
234 goto err;
235 }
236
237 section = OPENSSL_strdup("default");
238 if (section == NULL)
239 goto err;
240
241 if (_CONF_new_data(conf) == 0) {
242 ERR_raise(ERR_LIB_CONF, ERR_R_CONF_LIB);
243 goto err;
244 }
245
246 sv = _CONF_new_section(conf, section);
247 if (sv == NULL) {
248 ERR_raise(ERR_LIB_CONF, CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
249 goto err;
250 }
251
252 bufnum = 0;
253 again = 0;
254 for (;;) {
255 if (!BUF_MEM_grow(buff, bufnum + CONFBUFSIZE)) {
256 ERR_raise(ERR_LIB_CONF, ERR_R_BUF_LIB);
257 goto err;
258 }
259 p = &(buff->data[bufnum]);
260 *p = '\0';
261 read_retry:
262 if (in != NULL && BIO_gets(in, p, CONFBUFSIZE - 1) < 0)
263 goto err;
264 p[CONFBUFSIZE - 1] = '\0';
265 ii = i = strlen(p);
266 if (first_call) {
267 /* Other BOMs imply unsupported multibyte encoding,
268 * so don't strip them and let the error raise */
269 const unsigned char utf8_bom[3] = { 0xEF, 0xBB, 0xBF };
270
271 if (i >= 3 && memcmp(p, utf8_bom, 3) == 0) {
272 memmove(p, p + 3, i - 3);
273 p[i - 3] = 0;
274 i -= 3;
275 ii -= 3;
276 }
277 first_call = 0;
278 }
279 if (i == 0 && !again) {
280 /* the currently processed BIO is NULL or at EOF */
281 BIO *parent;
282
283 #ifndef OPENSSL_NO_POSIX_IO
284 /* continue processing with the next file from directory */
285 if (dirctx != NULL) {
286 BIO *next;
287
288 if ((next = get_next_file(dirpath, &dirctx)) != NULL) {
289 BIO_vfree(in);
290 in = next;
291 goto read_retry;
292 } else {
293 OPENSSL_free(dirpath);
294 dirpath = NULL;
295 }
296 }
297 #endif
298 /* no more files in directory, continue with processing parent */
299 if ((parent = sk_BIO_pop(biosk)) == NULL) {
300 /* everything processed get out of the loop */
301 break;
302 } else {
303 BIO_vfree(in);
304 in = parent;
305 goto read_retry;
306 }
307 }
308 again = 0;
309 while (i > 0) {
310 if ((p[i - 1] != '\r') && (p[i - 1] != '\n'))
311 break;
312 else
313 i--;
314 }
315 /*
316 * we removed some trailing stuff so there is a new line on the end.
317 */
318 if (ii && i == ii)
319 again = 1; /* long line */
320 else {
321 p[i] = '\0';
322 eline++; /* another input line */
323 }
324
325 /* we now have a line with trailing \r\n removed */
326
327 /* i is the number of bytes */
328 bufnum += i;
329
330 v = NULL;
331 /* check for line continuation */
332 if (!again && bufnum >= 1) {
333 /*
334 * If we have bytes and the last char '\\' and second last char
335 * is not '\\'
336 */
337 p = &(buff->data[bufnum - 1]);
338 if (IS_ESC(conf, p[0]) && ((bufnum <= 1) || !IS_ESC(conf, p[-1]))) {
339 bufnum--;
340 again = 1;
341 }
342 }
343 if (again)
344 continue;
345 bufnum = 0;
346 buf = buff->data;
347
348 clear_comments(conf, buf);
349 s = eat_ws(conf, buf);
350 if (IS_EOF(conf, *s))
351 continue; /* blank line */
352 if (*s == '[') {
353 char *ss;
354
355 s++;
356 start = eat_ws(conf, s);
357 ss = start;
358 again:
359 end = eat_alpha_numeric(conf, ss);
360 p = eat_ws(conf, end);
361 if (*p != ']') {
362 if (*p != '\0' && ss != p) {
363 ss = p;
364 goto again;
365 }
366 ERR_raise(ERR_LIB_CONF, CONF_R_MISSING_CLOSE_SQUARE_BRACKET);
367 goto err;
368 }
369 *end = '\0';
370 if (!str_copy(conf, NULL, §ion, start))
371 goto err;
372 if ((sv = _CONF_get_section(conf, section)) == NULL)
373 sv = _CONF_new_section(conf, section);
374 if (sv == NULL) {
375 ERR_raise(ERR_LIB_CONF, CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
376 goto err;
377 }
378 continue;
379 } else {
380 pname = s;
381 end = eat_alpha_numeric(conf, s);
382 if ((end[0] == ':') && (end[1] == ':')) {
383 *end = '\0';
384 end += 2;
385 psection = pname;
386 pname = end;
387 end = eat_alpha_numeric(conf, end);
388 } else {
389 psection = section;
390 }
391 p = eat_ws(conf, end);
392 if (CHECK_AND_SKIP_PREFIX(pname, ".pragma")
393 && (p != pname || *p == '=')) {
394 char *pval;
395
396 if (*p == '=') {
397 p++;
398 p = eat_ws(conf, p);
399 }
400 trim_ws(conf, p);
401
402 /* Pragma values take the form keyword:value */
403 pval = strchr(p, ':');
404 if (pval == NULL || pval == p || pval[1] == '\0') {
405 ERR_raise(ERR_LIB_CONF, CONF_R_INVALID_PRAGMA);
406 goto err;
407 }
408
409 *pval++ = '\0';
410 trim_ws(conf, p);
411 pval = eat_ws(conf, pval);
412
413 /*
414 * Known pragmas:
415 *
416 * dollarid takes "on", "true or "off", "false"
417 * abspath takes "on", "true or "off", "false"
418 * includedir directory prefix
419 */
420 if (strcmp(p, "dollarid") == 0) {
421 if (!parsebool(pval, &conf->flag_dollarid))
422 goto err;
423 } else if (strcmp(p, "abspath") == 0) {
424 if (!parsebool(pval, &conf->flag_abspath))
425 goto err;
426 } else if (strcmp(p, "includedir") == 0) {
427 OPENSSL_free(conf->includedir);
428 if ((conf->includedir = OPENSSL_strdup(pval)) == NULL)
429 goto err;
430 }
431
432 /*
433 * We *ignore* any unknown pragma.
434 */
435 continue;
436 } else if (CHECK_AND_SKIP_PREFIX(pname, ".include")
437 && (p != pname || *p == '=')) {
438 char *include = NULL;
439 BIO *next;
440 const char *include_dir = ossl_safe_getenv("OPENSSL_CONF_INCLUDE");
441 char *include_path = NULL;
442
443 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
444 /*
445 * The include processing below can cause the "conf" fuzzer to
446 * timeout due to the fuzzer inserting large and complicated
447 * includes - with a large amount of time spent in
448 * OPENSSL_strlcat/OPENSSL_strcpy. This is not a security
449 * concern because config files should never come from untrusted
450 * sources. We just set an arbitrary limit on the allowed
451 * number of includes when fuzzing to prevent this timeout.
452 */
453 if (numincludes++ > 10)
454 goto err;
455 #endif
456
457 if (include_dir == NULL)
458 include_dir = conf->includedir;
459
460 if (*p == '=') {
461 p++;
462 p = eat_ws(conf, p);
463 }
464 trim_ws(conf, p);
465 if (!str_copy(conf, psection, &include, p))
466 goto err;
467
468 if (include_dir != NULL && !ossl_is_absolute_path(include)) {
469 size_t newlen = strlen(include_dir) + strlen(include) + 2;
470
471 include_path = OPENSSL_malloc(newlen);
472 if (include_path == NULL) {
473 OPENSSL_free(include);
474 goto err;
475 }
476
477 OPENSSL_strlcpy(include_path, include_dir, newlen);
478 if (!ossl_ends_with_dirsep(include_path))
479 OPENSSL_strlcat(include_path, "/", newlen);
480 OPENSSL_strlcat(include_path, include, newlen);
481 OPENSSL_free(include);
482 } else {
483 include_path = include;
484 }
485
486 if (conf->flag_abspath
487 && !ossl_is_absolute_path(include_path)) {
488 ERR_raise(ERR_LIB_CONF, CONF_R_RELATIVE_PATH);
489 OPENSSL_free(include_path);
490 goto err;
491 }
492
493 /* get the BIO of the included file */
494 #ifndef OPENSSL_NO_POSIX_IO
495 next = process_include(include_path, &dirctx, &dirpath);
496 if (include_path != dirpath) {
497 /* dirpath will contain include in case of a directory */
498 OPENSSL_free(include_path);
499 }
500 #else
501 next = BIO_new_file(include_path, "r");
502 OPENSSL_free(include_path);
503 #endif
504
505 if (next != NULL) {
506 /* push the currently processing BIO onto stack */
507 if (biosk == NULL) {
508 if ((biosk = sk_BIO_new_null()) == NULL) {
509 ERR_raise(ERR_LIB_CONF, ERR_R_CRYPTO_LIB);
510 BIO_free(next);
511 goto err;
512 }
513 }
514 if (!sk_BIO_push(biosk, in)) {
515 ERR_raise(ERR_LIB_CONF, ERR_R_CRYPTO_LIB);
516 BIO_free(next);
517 goto err;
518 }
519 /* continue with reading from the included BIO */
520 in = next;
521 }
522 continue;
523 } else if (*p != '=') {
524 ERR_raise_data(ERR_LIB_CONF, CONF_R_MISSING_EQUAL_SIGN,
525 "HERE-->%s", p);
526 goto err;
527 }
528 *end = '\0';
529 p++;
530 start = eat_ws(conf, p);
531 trim_ws(conf, start);
532
533 if ((v = OPENSSL_malloc(sizeof(*v))) == NULL)
534 goto err;
535 v->name = OPENSSL_strdup(pname);
536 v->value = NULL;
537 if (v->name == NULL)
538 goto err;
539 if (!str_copy(conf, psection, &(v->value), start))
540 goto err;
541
542 if (strcmp(psection, section) != 0) {
543 if ((tv = _CONF_get_section(conf, psection))
544 == NULL)
545 tv = _CONF_new_section(conf, psection);
546 if (tv == NULL) {
547 ERR_raise(ERR_LIB_CONF,
548 CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
549 goto err;
550 }
551 } else
552 tv = sv;
553 if (_CONF_add_string(conf, tv, v) == 0) {
554 ERR_raise(ERR_LIB_CONF, ERR_R_CONF_LIB);
555 goto err;
556 }
557 v = NULL;
558 }
559 }
560 BUF_MEM_free(buff);
561 OPENSSL_free(section);
562 /*
563 * No need to pop, since we only get here if the stack is empty.
564 * If this causes a BIO leak, THE ISSUE IS SOMEWHERE ELSE!
565 */
566 sk_BIO_free(biosk);
567 return 1;
568
569 err:
570 BUF_MEM_free(buff);
571 OPENSSL_free(section);
572 /*
573 * Since |in| is the first element of the stack and should NOT be freed
574 * here, we cannot use sk_BIO_pop_free(). Instead, we pop and free one
575 * BIO at a time, making sure that the last one popped isn't.
576 */
577 while (sk_BIO_num(biosk) > 0) {
578 BIO *popped = sk_BIO_pop(biosk);
579 BIO_vfree(in);
580 in = popped;
581 }
582 sk_BIO_free(biosk);
583 #ifndef OPENSSL_NO_POSIX_IO
584 OPENSSL_free(dirpath);
585 if (dirctx != NULL)
586 OPENSSL_DIR_end(&dirctx);
587 #endif
588 if (line != NULL)
589 *line = eline;
590 BIO_snprintf(btmp, sizeof(btmp), "%ld", eline);
591 ERR_add_error_data(2, "line ", btmp);
592 if (h != conf->data) {
593 CONF_free(conf->data);
594 conf->data = NULL;
595 }
596 if (v != NULL) {
597 OPENSSL_free(v->name);
598 OPENSSL_free(v->value);
599 OPENSSL_free(v);
600 }
601 return 0;
602 }
603
clear_comments(CONF * conf,char * p)604 static void clear_comments(CONF *conf, char *p)
605 {
606 for (;;) {
607 if (IS_FCOMMENT(conf, *p)) {
608 *p = '\0';
609 return;
610 }
611 if (!IS_WS(conf, *p)) {
612 break;
613 }
614 p++;
615 }
616
617 for (;;) {
618 if (IS_COMMENT(conf, *p)) {
619 *p = '\0';
620 return;
621 }
622 if (IS_DQUOTE(conf, *p)) {
623 p = scan_dquote(conf, p);
624 continue;
625 }
626 if (IS_QUOTE(conf, *p)) {
627 p = scan_quote(conf, p);
628 continue;
629 }
630 if (IS_ESC(conf, *p)) {
631 p = scan_esc(conf, p);
632 continue;
633 }
634 if (IS_EOF(conf, *p))
635 return;
636 else
637 p++;
638 }
639 }
640
str_copy(CONF * conf,char * section,char ** pto,char * from)641 static int str_copy(CONF *conf, char *section, char **pto, char *from)
642 {
643 int q, r, rr = 0, to = 0, len = 0;
644 char *s, *e, *rp, *p, *rrp, *np, *cp, v;
645 BUF_MEM *buf;
646
647 if ((buf = BUF_MEM_new()) == NULL)
648 return 0;
649
650 len = strlen(from) + 1;
651 if (!BUF_MEM_grow(buf, len))
652 goto err;
653
654 for (;;) {
655 if (IS_QUOTE(conf, *from)) {
656 q = *from;
657 from++;
658 while (!IS_EOF(conf, *from) && (*from != q)) {
659 if (IS_ESC(conf, *from)) {
660 from++;
661 if (IS_EOF(conf, *from))
662 break;
663 }
664 buf->data[to++] = *(from++);
665 }
666 if (*from == q)
667 from++;
668 } else if (IS_DQUOTE(conf, *from)) {
669 q = *from;
670 from++;
671 while (!IS_EOF(conf, *from)) {
672 if (*from == q) {
673 if (*(from + 1) == q) {
674 from++;
675 } else {
676 break;
677 }
678 }
679 buf->data[to++] = *(from++);
680 }
681 if (*from == q)
682 from++;
683 } else if (IS_ESC(conf, *from)) {
684 from++;
685 v = *(from++);
686 if (IS_EOF(conf, v))
687 break;
688 else if (v == 'r')
689 v = '\r';
690 else if (v == 'n')
691 v = '\n';
692 else if (v == 'b')
693 v = '\b';
694 else if (v == 't')
695 v = '\t';
696 buf->data[to++] = v;
697 } else if (IS_EOF(conf, *from))
698 break;
699 else if (*from == '$'
700 && (!conf->flag_dollarid
701 || from[1] == '{'
702 || from[1] == '(')) {
703 size_t newsize;
704
705 /* try to expand it */
706 rrp = NULL;
707 s = &(from[1]);
708 if (*s == '{')
709 q = '}';
710 else if (*s == '(')
711 q = ')';
712 else
713 q = 0;
714
715 if (q)
716 s++;
717 cp = section;
718 e = np = s;
719 while (IS_ALNUM(conf, *e)
720 || (conf->flag_dollarid && IS_DOLLAR(conf, *e)))
721 e++;
722 if ((e[0] == ':') && (e[1] == ':')) {
723 cp = np;
724 rrp = e;
725 rr = *e;
726 *rrp = '\0';
727 e += 2;
728 np = e;
729 while (IS_ALNUM(conf, *e)
730 || (conf->flag_dollarid && IS_DOLLAR(conf, *e)))
731 e++;
732 }
733 r = *e;
734 *e = '\0';
735 rp = e;
736 if (q) {
737 if (r != q) {
738 ERR_raise(ERR_LIB_CONF, CONF_R_NO_CLOSE_BRACE);
739 goto err;
740 }
741 e++;
742 }
743 /*-
744 * So at this point we have
745 * np which is the start of the name string which is
746 * '\0' terminated.
747 * cp which is the start of the section string which is
748 * '\0' terminated.
749 * e is the 'next point after'.
750 * r and rr are the chars replaced by the '\0'
751 * rp and rrp is where 'r' and 'rr' came from.
752 */
753 p = _CONF_get_string(conf, cp, np);
754 if (rrp != NULL)
755 *rrp = rr;
756 *rp = r;
757 if (p == NULL) {
758 ERR_raise(ERR_LIB_CONF, CONF_R_VARIABLE_HAS_NO_VALUE);
759 goto err;
760 }
761 newsize = strlen(p) + buf->length - (e - from);
762 if (newsize > MAX_CONF_VALUE_LENGTH) {
763 ERR_raise(ERR_LIB_CONF, CONF_R_VARIABLE_EXPANSION_TOO_LONG);
764 goto err;
765 }
766 if (!BUF_MEM_grow_clean(buf, newsize)) {
767 ERR_raise(ERR_LIB_CONF, ERR_R_BUF_LIB);
768 goto err;
769 }
770 while (*p)
771 buf->data[to++] = *(p++);
772
773 /*
774 * Since we change the pointer 'from', we also have to change the
775 * perceived length of the string it points at. /RL
776 */
777 len -= e - from;
778 from = e;
779
780 /*
781 * In case there were no braces or parenthesis around the
782 * variable reference, we have to put back the character that was
783 * replaced with a '\0'. /RL
784 */
785 *rp = r;
786 } else
787 buf->data[to++] = *(from++);
788 }
789 buf->data[to] = '\0';
790 OPENSSL_free(*pto);
791 *pto = buf->data;
792 OPENSSL_free(buf);
793 return 1;
794 err:
795 BUF_MEM_free(buf);
796 return 0;
797 }
798
799 #ifndef OPENSSL_NO_POSIX_IO
800 /*
801 * Check whether included path is a directory.
802 * Returns next BIO to process and in case of a directory
803 * also an opened directory context and the include path.
804 */
process_include(char * include,OPENSSL_DIR_CTX ** dirctx,char ** dirpath)805 static BIO *process_include(char *include, OPENSSL_DIR_CTX **dirctx,
806 char **dirpath)
807 {
808 struct stat st;
809 BIO *next;
810
811 if (stat(include, &st) < 0) {
812 ERR_raise_data(ERR_LIB_SYS, errno, "calling stat(%s)", include);
813 /* missing include file is not fatal error */
814 return NULL;
815 }
816
817 if (S_ISDIR(st.st_mode)) {
818 if (*dirctx != NULL) {
819 ERR_raise_data(ERR_LIB_CONF, CONF_R_RECURSIVE_DIRECTORY_INCLUDE,
820 "%s", include);
821 return NULL;
822 }
823 /* a directory, load its contents */
824 if ((next = get_next_file(include, dirctx)) != NULL)
825 *dirpath = include;
826 return next;
827 }
828
829 next = BIO_new_file(include, "r");
830 return next;
831 }
832
833 /*
834 * Get next file from the directory path.
835 * Returns BIO of the next file to read and updates dirctx.
836 */
get_next_file(const char * path,OPENSSL_DIR_CTX ** dirctx)837 static BIO *get_next_file(const char *path, OPENSSL_DIR_CTX **dirctx)
838 {
839 const char *filename;
840 size_t pathlen;
841
842 pathlen = strlen(path);
843 while ((filename = OPENSSL_DIR_read(dirctx, path)) != NULL) {
844 size_t namelen;
845
846 namelen = strlen(filename);
847
848 if ((namelen > 5
849 && OPENSSL_strcasecmp(filename + namelen - 5, ".conf") == 0)
850 || (namelen > 4
851 && OPENSSL_strcasecmp(filename + namelen - 4, ".cnf") == 0)) {
852 size_t newlen;
853 char *newpath;
854 BIO *bio;
855
856 newlen = pathlen + namelen + 2;
857 newpath = OPENSSL_zalloc(newlen);
858 if (newpath == NULL)
859 break;
860 #ifdef OPENSSL_SYS_VMS
861 /*
862 * If the given path isn't clear VMS syntax,
863 * we treat it as on Unix.
864 */
865 if (path[pathlen - 1] == ']'
866 || path[pathlen - 1] == '>'
867 || path[pathlen - 1] == ':') {
868 /* Clear VMS directory syntax, just copy as is */
869 OPENSSL_strlcpy(newpath, path, newlen);
870 }
871 #endif
872 if (newpath[0] == '\0') {
873 OPENSSL_strlcpy(newpath, path, newlen);
874 OPENSSL_strlcat(newpath, "/", newlen);
875 }
876 OPENSSL_strlcat(newpath, filename, newlen);
877
878 bio = BIO_new_file(newpath, "r");
879 OPENSSL_free(newpath);
880 /* Errors when opening files are non-fatal. */
881 if (bio != NULL)
882 return bio;
883 }
884 }
885 OPENSSL_DIR_end(dirctx);
886 *dirctx = NULL;
887 return NULL;
888 }
889 #endif
890
is_keytype(const CONF * conf,char c,unsigned short type)891 static int is_keytype(const CONF *conf, char c, unsigned short type)
892 {
893 const unsigned short *keytypes = (const unsigned short *)conf->meth_data;
894 unsigned char key = (unsigned char)c;
895
896 #ifdef CHARSET_EBCDIC
897 #if CHAR_BIT > 8
898 if (key > 255) {
899 /* key is out of range for os_toascii table */
900 return 0;
901 }
902 #endif
903 /* convert key from ebcdic to ascii */
904 key = os_toascii[key];
905 #endif
906
907 if (key > 127) {
908 /* key is not a seven bit ascii character */
909 return 0;
910 }
911
912 return (keytypes[key] & type) ? 1 : 0;
913 }
914
eat_ws(CONF * conf,char * p)915 static char *eat_ws(CONF *conf, char *p)
916 {
917 while (IS_WS(conf, *p) && (!IS_EOF(conf, *p)))
918 p++;
919 return p;
920 }
921
trim_ws(CONF * conf,char * start)922 static void trim_ws(CONF *conf, char *start)
923 {
924 char *p = start;
925
926 while (!IS_EOF(conf, *p))
927 p++;
928 p--;
929 while ((p >= start) && IS_WS(conf, *p))
930 p--;
931 p++;
932 *p = '\0';
933 }
934
eat_alpha_numeric(CONF * conf,char * p)935 static char *eat_alpha_numeric(CONF *conf, char *p)
936 {
937 for (;;) {
938 if (IS_ESC(conf, *p)) {
939 p = scan_esc(conf, p);
940 continue;
941 }
942 if (!(IS_ALNUM_PUNCT(conf, *p)
943 || (conf->flag_dollarid && IS_DOLLAR(conf, *p))))
944 return p;
945 p++;
946 }
947 }
948
scan_quote(CONF * conf,char * p)949 static char *scan_quote(CONF *conf, char *p)
950 {
951 int q = *p;
952
953 p++;
954 while (!(IS_EOF(conf, *p)) && (*p != q)) {
955 if (IS_ESC(conf, *p)) {
956 p++;
957 if (IS_EOF(conf, *p))
958 return p;
959 }
960 p++;
961 }
962 if (*p == q)
963 p++;
964 return p;
965 }
966
scan_dquote(CONF * conf,char * p)967 static char *scan_dquote(CONF *conf, char *p)
968 {
969 int q = *p;
970
971 p++;
972 while (!(IS_EOF(conf, *p))) {
973 if (*p == q) {
974 if (*(p + 1) == q) {
975 p++;
976 } else {
977 break;
978 }
979 }
980 p++;
981 }
982 if (*p == q)
983 p++;
984 return p;
985 }
986
dump_value_doall_arg(const CONF_VALUE * a,BIO * out)987 static void dump_value_doall_arg(const CONF_VALUE *a, BIO *out)
988 {
989 if (a->name)
990 BIO_printf(out, "[%s] %s=%s\n", a->section, a->name, a->value);
991 else
992 BIO_printf(out, "[[%s]]\n", a->section);
993 }
994
995 IMPLEMENT_LHASH_DOALL_ARG_CONST(CONF_VALUE, BIO);
996
def_dump(const CONF * conf,BIO * out)997 static int def_dump(const CONF *conf, BIO *out)
998 {
999 lh_CONF_VALUE_doall_BIO(conf->data, dump_value_doall_arg, out);
1000 return 1;
1001 }
1002
def_is_number(const CONF * conf,char c)1003 static int def_is_number(const CONF *conf, char c)
1004 {
1005 return IS_NUMBER(conf, c);
1006 }
1007
def_to_int(const CONF * conf,char c)1008 static int def_to_int(const CONF *conf, char c)
1009 {
1010 return c - '0';
1011 }
1012