1 /*
2 * Copyright 1995-2023 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 "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
192 /* Parse a boolean value and fill in *flag. Return 0 on error. */
parsebool(const char * pval,int * flag)193 static int parsebool(const char *pval, int *flag)
194 {
195 if (OPENSSL_strcasecmp(pval, "on") == 0
196 || OPENSSL_strcasecmp(pval, "true") == 0) {
197 *flag = 1;
198 } else if (OPENSSL_strcasecmp(pval, "off") == 0
199 || OPENSSL_strcasecmp(pval, "false") == 0) {
200 *flag = 0;
201 } else {
202 ERR_raise(ERR_LIB_CONF, CONF_R_INVALID_PRAGMA);
203 return 0;
204 }
205 return 1;
206 }
207
def_load_bio(CONF * conf,BIO * in,long * line)208 static int def_load_bio(CONF *conf, BIO *in, long *line)
209 {
210 /* The macro BUFSIZE conflicts with a system macro in VxWorks */
211 #define CONFBUFSIZE 512
212 int bufnum = 0, i, ii;
213 BUF_MEM *buff = NULL;
214 char *s, *p, *end;
215 int again;
216 int first_call = 1;
217 long eline = 0;
218 char btmp[DECIMAL_SIZE(eline) + 1];
219 CONF_VALUE *v = NULL, *tv;
220 CONF_VALUE *sv = NULL;
221 char *section = NULL, *buf;
222 char *start, *psection, *pname;
223 void *h = (void *)(conf->data);
224 STACK_OF(BIO) *biosk = NULL;
225 #ifndef OPENSSL_NO_POSIX_IO
226 char *dirpath = NULL;
227 OPENSSL_DIR_CTX *dirctx = NULL;
228 #endif
229 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
230 int numincludes = 0;
231 #endif
232
233 if ((buff = BUF_MEM_new()) == NULL) {
234 ERR_raise(ERR_LIB_CONF, ERR_R_BUF_LIB);
235 goto err;
236 }
237
238 section = OPENSSL_strdup("default");
239 if (section == NULL) {
240 ERR_raise(ERR_LIB_CONF, ERR_R_MALLOC_FAILURE);
241 goto err;
242 }
243
244 if (_CONF_new_data(conf) == 0) {
245 ERR_raise(ERR_LIB_CONF, ERR_R_MALLOC_FAILURE);
246 goto err;
247 }
248
249 sv = _CONF_new_section(conf, section);
250 if (sv == NULL) {
251 ERR_raise(ERR_LIB_CONF, CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
252 goto err;
253 }
254
255 bufnum = 0;
256 again = 0;
257 for (;;) {
258 if (!BUF_MEM_grow(buff, bufnum + CONFBUFSIZE)) {
259 ERR_raise(ERR_LIB_CONF, ERR_R_BUF_LIB);
260 goto err;
261 }
262 p = &(buff->data[bufnum]);
263 *p = '\0';
264 read_retry:
265 if (in != NULL && BIO_gets(in, p, CONFBUFSIZE - 1) < 0)
266 goto err;
267 p[CONFBUFSIZE - 1] = '\0';
268 ii = i = strlen(p);
269 if (first_call) {
270 /* Other BOMs imply unsupported multibyte encoding,
271 * so don't strip them and let the error raise */
272 const unsigned char utf8_bom[3] = {0xEF, 0xBB, 0xBF};
273
274 if (i >= 3 && memcmp(p, utf8_bom, 3) == 0) {
275 memmove(p, p + 3, i - 3);
276 p[i - 3] = 0;
277 i -= 3;
278 ii -= 3;
279 }
280 first_call = 0;
281 }
282 if (i == 0 && !again) {
283 /* the currently processed BIO is NULL or at EOF */
284 BIO *parent;
285
286 #ifndef OPENSSL_NO_POSIX_IO
287 /* continue processing with the next file from directory */
288 if (dirctx != NULL) {
289 BIO *next;
290
291 if ((next = get_next_file(dirpath, &dirctx)) != NULL) {
292 BIO_vfree(in);
293 in = next;
294 goto read_retry;
295 } else {
296 OPENSSL_free(dirpath);
297 dirpath = NULL;
298 }
299 }
300 #endif
301 /* no more files in directory, continue with processing parent */
302 if ((parent = sk_BIO_pop(biosk)) == NULL) {
303 /* everything processed get out of the loop */
304 break;
305 } else {
306 BIO_vfree(in);
307 in = parent;
308 goto read_retry;
309 }
310 }
311 again = 0;
312 while (i > 0) {
313 if ((p[i - 1] != '\r') && (p[i - 1] != '\n'))
314 break;
315 else
316 i--;
317 }
318 /*
319 * we removed some trailing stuff so there is a new line on the end.
320 */
321 if (ii && i == ii)
322 again = 1; /* long line */
323 else {
324 p[i] = '\0';
325 eline++; /* another input line */
326 }
327
328 /* we now have a line with trailing \r\n removed */
329
330 /* i is the number of bytes */
331 bufnum += i;
332
333 v = NULL;
334 /* check for line continuation */
335 if (bufnum >= 1) {
336 /*
337 * If we have bytes and the last char '\\' and second last char
338 * is not '\\'
339 */
340 p = &(buff->data[bufnum - 1]);
341 if (IS_ESC(conf, p[0]) && ((bufnum <= 1) || !IS_ESC(conf, p[-1]))) {
342 bufnum--;
343 again = 1;
344 }
345 }
346 if (again)
347 continue;
348 bufnum = 0;
349 buf = buff->data;
350
351 clear_comments(conf, buf);
352 s = eat_ws(conf, buf);
353 if (IS_EOF(conf, *s))
354 continue; /* blank line */
355 if (*s == '[') {
356 char *ss;
357
358 s++;
359 start = eat_ws(conf, s);
360 ss = start;
361 again:
362 end = eat_alpha_numeric(conf, ss);
363 p = eat_ws(conf, end);
364 if (*p != ']') {
365 if (*p != '\0' && ss != p) {
366 ss = p;
367 goto again;
368 }
369 ERR_raise(ERR_LIB_CONF, CONF_R_MISSING_CLOSE_SQUARE_BRACKET);
370 goto err;
371 }
372 *end = '\0';
373 if (!str_copy(conf, NULL, §ion, start))
374 goto err;
375 if ((sv = _CONF_get_section(conf, section)) == NULL)
376 sv = _CONF_new_section(conf, section);
377 if (sv == NULL) {
378 ERR_raise(ERR_LIB_CONF, CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
379 goto err;
380 }
381 continue;
382 } else {
383 pname = s;
384 end = eat_alpha_numeric(conf, s);
385 if ((end[0] == ':') && (end[1] == ':')) {
386 *end = '\0';
387 end += 2;
388 psection = pname;
389 pname = end;
390 end = eat_alpha_numeric(conf, end);
391 } else {
392 psection = section;
393 }
394 p = eat_ws(conf, end);
395 if (strncmp(pname, ".pragma", 7) == 0
396 && (p != pname + 7 || *p == '=')) {
397 char *pval;
398
399 if (*p == '=') {
400 p++;
401 p = eat_ws(conf, p);
402 }
403 trim_ws(conf, p);
404
405 /* Pragma values take the form keyword:value */
406 pval = strchr(p, ':');
407 if (pval == NULL || pval == p || pval[1] == '\0') {
408 ERR_raise(ERR_LIB_CONF, CONF_R_INVALID_PRAGMA);
409 goto err;
410 }
411
412 *pval++ = '\0';
413 trim_ws(conf, p);
414 pval = eat_ws(conf, pval);
415
416 /*
417 * Known pragmas:
418 *
419 * dollarid takes "on", "true or "off", "false"
420 * abspath takes "on", "true or "off", "false"
421 * includedir directory prefix
422 */
423 if (strcmp(p, "dollarid") == 0) {
424 if (!parsebool(pval, &conf->flag_dollarid))
425 goto err;
426 } else if (strcmp(p, "abspath") == 0) {
427 if (!parsebool(pval, &conf->flag_abspath))
428 goto err;
429 } else if (strcmp(p, "includedir") == 0) {
430 OPENSSL_free(conf->includedir);
431 if ((conf->includedir = OPENSSL_strdup(pval)) == NULL) {
432 ERR_raise(ERR_LIB_CONF, ERR_R_MALLOC_FAILURE);
433 goto err;
434 }
435 }
436
437 /*
438 * We *ignore* any unknown pragma.
439 */
440 continue;
441 } else if (strncmp(pname, ".include", 8) == 0
442 && (p != pname + 8 || *p == '=')) {
443 char *include = NULL;
444 BIO *next;
445 const char *include_dir = ossl_safe_getenv("OPENSSL_CONF_INCLUDE");
446 char *include_path = NULL;
447
448 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
449 /*
450 * The include processing below can cause the "conf" fuzzer to
451 * timeout due to the fuzzer inserting large and complicated
452 * includes - with a large amount of time spent in
453 * OPENSSL_strlcat/OPENSSL_strcpy. This is not a security
454 * concern because config files should never come from untrusted
455 * sources. We just set an arbitrary limit on the allowed
456 * number of includes when fuzzing to prevent this timeout.
457 */
458 if (numincludes++ > 10)
459 goto err;
460 #endif
461
462 if (include_dir == NULL)
463 include_dir = conf->includedir;
464
465 if (*p == '=') {
466 p++;
467 p = eat_ws(conf, p);
468 }
469 trim_ws(conf, p);
470 if (!str_copy(conf, psection, &include, p))
471 goto err;
472
473 if (include_dir != NULL && !ossl_is_absolute_path(include)) {
474 size_t newlen = strlen(include_dir) + strlen(include) + 2;
475
476 include_path = OPENSSL_malloc(newlen);
477 if (include_path == NULL) {
478 ERR_raise(ERR_LIB_CONF, ERR_R_MALLOC_FAILURE);
479 OPENSSL_free(include);
480 goto err;
481 }
482
483 OPENSSL_strlcpy(include_path, include_dir, newlen);
484 if (!ossl_ends_with_dirsep(include_path))
485 OPENSSL_strlcat(include_path, "/", newlen);
486 OPENSSL_strlcat(include_path, include, newlen);
487 OPENSSL_free(include);
488 } else {
489 include_path = include;
490 }
491
492 if (conf->flag_abspath
493 && !ossl_is_absolute_path(include_path)) {
494 ERR_raise(ERR_LIB_CONF, CONF_R_RELATIVE_PATH);
495 OPENSSL_free(include_path);
496 goto err;
497 }
498
499 /* get the BIO of the included file */
500 #ifndef OPENSSL_NO_POSIX_IO
501 next = process_include(include_path, &dirctx, &dirpath);
502 if (include_path != dirpath) {
503 /* dirpath will contain include in case of a directory */
504 OPENSSL_free(include_path);
505 }
506 #else
507 next = BIO_new_file(include_path, "r");
508 OPENSSL_free(include_path);
509 #endif
510
511 if (next != NULL) {
512 /* push the currently processing BIO onto stack */
513 if (biosk == NULL) {
514 if ((biosk = sk_BIO_new_null()) == NULL) {
515 ERR_raise(ERR_LIB_CONF, ERR_R_MALLOC_FAILURE);
516 BIO_free(next);
517 goto err;
518 }
519 }
520 if (!sk_BIO_push(biosk, in)) {
521 ERR_raise(ERR_LIB_CONF, ERR_R_MALLOC_FAILURE);
522 BIO_free(next);
523 goto err;
524 }
525 /* continue with reading from the included BIO */
526 in = next;
527 }
528 continue;
529 } else if (*p != '=') {
530 ERR_raise_data(ERR_LIB_CONF, CONF_R_MISSING_EQUAL_SIGN,
531 "HERE-->%s", p);
532 goto err;
533 }
534 *end = '\0';
535 p++;
536 start = eat_ws(conf, p);
537 trim_ws(conf, start);
538
539 if ((v = OPENSSL_malloc(sizeof(*v))) == NULL) {
540 ERR_raise(ERR_LIB_CONF, ERR_R_MALLOC_FAILURE);
541 goto err;
542 }
543 v->name = OPENSSL_strdup(pname);
544 v->value = NULL;
545 if (v->name == NULL) {
546 ERR_raise(ERR_LIB_CONF, ERR_R_MALLOC_FAILURE);
547 goto err;
548 }
549 if (!str_copy(conf, psection, &(v->value), start))
550 goto err;
551
552 if (strcmp(psection, section) != 0) {
553 if ((tv = _CONF_get_section(conf, psection))
554 == NULL)
555 tv = _CONF_new_section(conf, psection);
556 if (tv == NULL) {
557 ERR_raise(ERR_LIB_CONF,
558 CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
559 goto err;
560 }
561 } else
562 tv = sv;
563 if (_CONF_add_string(conf, tv, v) == 0) {
564 ERR_raise(ERR_LIB_CONF, ERR_R_MALLOC_FAILURE);
565 goto err;
566 }
567 v = NULL;
568 }
569 }
570 BUF_MEM_free(buff);
571 OPENSSL_free(section);
572 /*
573 * No need to pop, since we only get here if the stack is empty.
574 * If this causes a BIO leak, THE ISSUE IS SOMEWHERE ELSE!
575 */
576 sk_BIO_free(biosk);
577 return 1;
578
579 err:
580 BUF_MEM_free(buff);
581 OPENSSL_free(section);
582 /*
583 * Since |in| is the first element of the stack and should NOT be freed
584 * here, we cannot use sk_BIO_pop_free(). Instead, we pop and free one
585 * BIO at a time, making sure that the last one popped isn't.
586 */
587 while (sk_BIO_num(biosk) > 0) {
588 BIO *popped = sk_BIO_pop(biosk);
589 BIO_vfree(in);
590 in = popped;
591 }
592 sk_BIO_free(biosk);
593 #ifndef OPENSSL_NO_POSIX_IO
594 OPENSSL_free(dirpath);
595 if (dirctx != NULL)
596 OPENSSL_DIR_end(&dirctx);
597 #endif
598 if (line != NULL)
599 *line = eline;
600 BIO_snprintf(btmp, sizeof(btmp), "%ld", eline);
601 ERR_add_error_data(2, "line ", btmp);
602 if (h != conf->data) {
603 CONF_free(conf->data);
604 conf->data = NULL;
605 }
606 if (v != NULL) {
607 OPENSSL_free(v->name);
608 OPENSSL_free(v->value);
609 OPENSSL_free(v);
610 }
611 return 0;
612 }
613
clear_comments(CONF * conf,char * p)614 static void clear_comments(CONF *conf, char *p)
615 {
616 for (;;) {
617 if (IS_FCOMMENT(conf, *p)) {
618 *p = '\0';
619 return;
620 }
621 if (!IS_WS(conf, *p)) {
622 break;
623 }
624 p++;
625 }
626
627 for (;;) {
628 if (IS_COMMENT(conf, *p)) {
629 *p = '\0';
630 return;
631 }
632 if (IS_DQUOTE(conf, *p)) {
633 p = scan_dquote(conf, p);
634 continue;
635 }
636 if (IS_QUOTE(conf, *p)) {
637 p = scan_quote(conf, p);
638 continue;
639 }
640 if (IS_ESC(conf, *p)) {
641 p = scan_esc(conf, p);
642 continue;
643 }
644 if (IS_EOF(conf, *p))
645 return;
646 else
647 p++;
648 }
649 }
650
str_copy(CONF * conf,char * section,char ** pto,char * from)651 static int str_copy(CONF *conf, char *section, char **pto, char *from)
652 {
653 int q, r, rr = 0, to = 0, len = 0;
654 char *s, *e, *rp, *p, *rrp, *np, *cp, v;
655 BUF_MEM *buf;
656
657 if ((buf = BUF_MEM_new()) == NULL)
658 return 0;
659
660 len = strlen(from) + 1;
661 if (!BUF_MEM_grow(buf, len))
662 goto err;
663
664 for (;;) {
665 if (IS_QUOTE(conf, *from)) {
666 q = *from;
667 from++;
668 while (!IS_EOF(conf, *from) && (*from != q)) {
669 if (IS_ESC(conf, *from)) {
670 from++;
671 if (IS_EOF(conf, *from))
672 break;
673 }
674 buf->data[to++] = *(from++);
675 }
676 if (*from == q)
677 from++;
678 } else if (IS_DQUOTE(conf, *from)) {
679 q = *from;
680 from++;
681 while (!IS_EOF(conf, *from)) {
682 if (*from == q) {
683 if (*(from + 1) == q) {
684 from++;
685 } else {
686 break;
687 }
688 }
689 buf->data[to++] = *(from++);
690 }
691 if (*from == q)
692 from++;
693 } else if (IS_ESC(conf, *from)) {
694 from++;
695 v = *(from++);
696 if (IS_EOF(conf, v))
697 break;
698 else if (v == 'r')
699 v = '\r';
700 else if (v == 'n')
701 v = '\n';
702 else if (v == 'b')
703 v = '\b';
704 else if (v == 't')
705 v = '\t';
706 buf->data[to++] = v;
707 } else if (IS_EOF(conf, *from))
708 break;
709 else if (*from == '$'
710 && (!conf->flag_dollarid
711 || from[1] == '{'
712 || from[1] == '(')) {
713 size_t newsize;
714
715 /* try to expand it */
716 rrp = NULL;
717 s = &(from[1]);
718 if (*s == '{')
719 q = '}';
720 else if (*s == '(')
721 q = ')';
722 else
723 q = 0;
724
725 if (q)
726 s++;
727 cp = section;
728 e = np = s;
729 while (IS_ALNUM(conf, *e)
730 || (conf->flag_dollarid && IS_DOLLAR(conf, *e)))
731 e++;
732 if ((e[0] == ':') && (e[1] == ':')) {
733 cp = np;
734 rrp = e;
735 rr = *e;
736 *rrp = '\0';
737 e += 2;
738 np = e;
739 while (IS_ALNUM(conf, *e)
740 || (conf->flag_dollarid && IS_DOLLAR(conf, *e)))
741 e++;
742 }
743 r = *e;
744 *e = '\0';
745 rp = e;
746 if (q) {
747 if (r != q) {
748 ERR_raise(ERR_LIB_CONF, CONF_R_NO_CLOSE_BRACE);
749 goto err;
750 }
751 e++;
752 }
753 /*-
754 * So at this point we have
755 * np which is the start of the name string which is
756 * '\0' terminated.
757 * cp which is the start of the section string which is
758 * '\0' terminated.
759 * e is the 'next point after'.
760 * r and rr are the chars replaced by the '\0'
761 * rp and rrp is where 'r' and 'rr' came from.
762 */
763 p = _CONF_get_string(conf, cp, np);
764 if (rrp != NULL)
765 *rrp = rr;
766 *rp = r;
767 if (p == NULL) {
768 ERR_raise(ERR_LIB_CONF, CONF_R_VARIABLE_HAS_NO_VALUE);
769 goto err;
770 }
771 newsize = strlen(p) + buf->length - (e - from);
772 if (newsize > MAX_CONF_VALUE_LENGTH) {
773 ERR_raise(ERR_LIB_CONF, CONF_R_VARIABLE_EXPANSION_TOO_LONG);
774 goto err;
775 }
776 if (!BUF_MEM_grow_clean(buf, newsize)) {
777 ERR_raise(ERR_LIB_CONF, ERR_R_MALLOC_FAILURE);
778 goto err;
779 }
780 while (*p)
781 buf->data[to++] = *(p++);
782
783 /*
784 * Since we change the pointer 'from', we also have to change the
785 * perceived length of the string it points at. /RL
786 */
787 len -= e - from;
788 from = e;
789
790 /*
791 * In case there were no braces or parenthesis around the
792 * variable reference, we have to put back the character that was
793 * replaced with a '\0'. /RL
794 */
795 *rp = r;
796 } else
797 buf->data[to++] = *(from++);
798 }
799 buf->data[to] = '\0';
800 OPENSSL_free(*pto);
801 *pto = buf->data;
802 OPENSSL_free(buf);
803 return 1;
804 err:
805 BUF_MEM_free(buf);
806 return 0;
807 }
808
809 #ifndef OPENSSL_NO_POSIX_IO
810 /*
811 * Check whether included path is a directory.
812 * Returns next BIO to process and in case of a directory
813 * also an opened directory context and the include path.
814 */
process_include(char * include,OPENSSL_DIR_CTX ** dirctx,char ** dirpath)815 static BIO *process_include(char *include, OPENSSL_DIR_CTX **dirctx,
816 char **dirpath)
817 {
818 struct stat st;
819 BIO *next;
820
821 if (stat(include, &st) < 0) {
822 ERR_raise_data(ERR_LIB_SYS, errno, "calling stat(%s)", include);
823 /* missing include file is not fatal error */
824 return NULL;
825 }
826
827 if (S_ISDIR(st.st_mode)) {
828 if (*dirctx != NULL) {
829 ERR_raise_data(ERR_LIB_CONF, CONF_R_RECURSIVE_DIRECTORY_INCLUDE,
830 "%s", include);
831 return NULL;
832 }
833 /* a directory, load its contents */
834 if ((next = get_next_file(include, dirctx)) != NULL)
835 *dirpath = include;
836 return next;
837 }
838
839 next = BIO_new_file(include, "r");
840 return next;
841 }
842
843 /*
844 * Get next file from the directory path.
845 * Returns BIO of the next file to read and updates dirctx.
846 */
get_next_file(const char * path,OPENSSL_DIR_CTX ** dirctx)847 static BIO *get_next_file(const char *path, OPENSSL_DIR_CTX **dirctx)
848 {
849 const char *filename;
850 size_t pathlen;
851
852 pathlen = strlen(path);
853 while ((filename = OPENSSL_DIR_read(dirctx, path)) != NULL) {
854 size_t namelen;
855
856 namelen = strlen(filename);
857
858
859 if ((namelen > 5
860 && OPENSSL_strcasecmp(filename + namelen - 5, ".conf") == 0)
861 || (namelen > 4
862 && OPENSSL_strcasecmp(filename + namelen - 4, ".cnf") == 0)) {
863 size_t newlen;
864 char *newpath;
865 BIO *bio;
866
867 newlen = pathlen + namelen + 2;
868 newpath = OPENSSL_zalloc(newlen);
869 if (newpath == NULL) {
870 ERR_raise(ERR_LIB_CONF, ERR_R_MALLOC_FAILURE);
871 break;
872 }
873 #ifdef OPENSSL_SYS_VMS
874 /*
875 * If the given path isn't clear VMS syntax,
876 * we treat it as on Unix.
877 */
878 if (path[pathlen - 1] == ']'
879 || path[pathlen - 1] == '>'
880 || path[pathlen - 1] == ':') {
881 /* Clear VMS directory syntax, just copy as is */
882 OPENSSL_strlcpy(newpath, path, newlen);
883 }
884 #endif
885 if (newpath[0] == '\0') {
886 OPENSSL_strlcpy(newpath, path, newlen);
887 OPENSSL_strlcat(newpath, "/", newlen);
888 }
889 OPENSSL_strlcat(newpath, filename, newlen);
890
891 bio = BIO_new_file(newpath, "r");
892 OPENSSL_free(newpath);
893 /* Errors when opening files are non-fatal. */
894 if (bio != NULL)
895 return bio;
896 }
897 }
898 OPENSSL_DIR_end(dirctx);
899 *dirctx = NULL;
900 return NULL;
901 }
902 #endif
903
is_keytype(const CONF * conf,char c,unsigned short type)904 static int is_keytype(const CONF *conf, char c, unsigned short type)
905 {
906 const unsigned short * keytypes = (const unsigned short *) conf->meth_data;
907 unsigned char key = (unsigned char)c;
908
909 #ifdef CHARSET_EBCDIC
910 # if CHAR_BIT > 8
911 if (key > 255) {
912 /* key is out of range for os_toascii table */
913 return 0;
914 }
915 # endif
916 /* convert key from ebcdic to ascii */
917 key = os_toascii[key];
918 #endif
919
920 if (key > 127) {
921 /* key is not a seven bit ascii character */
922 return 0;
923 }
924
925 return (keytypes[key] & type) ? 1 : 0;
926 }
927
eat_ws(CONF * conf,char * p)928 static char *eat_ws(CONF *conf, char *p)
929 {
930 while (IS_WS(conf, *p) && (!IS_EOF(conf, *p)))
931 p++;
932 return p;
933 }
934
trim_ws(CONF * conf,char * start)935 static void trim_ws(CONF *conf, char *start)
936 {
937 char *p = start;
938
939 while (!IS_EOF(conf, *p))
940 p++;
941 p--;
942 while ((p >= start) && IS_WS(conf, *p))
943 p--;
944 p++;
945 *p = '\0';
946 }
947
eat_alpha_numeric(CONF * conf,char * p)948 static char *eat_alpha_numeric(CONF *conf, char *p)
949 {
950 for (;;) {
951 if (IS_ESC(conf, *p)) {
952 p = scan_esc(conf, p);
953 continue;
954 }
955 if (!(IS_ALNUM_PUNCT(conf, *p)
956 || (conf->flag_dollarid && IS_DOLLAR(conf, *p))))
957 return p;
958 p++;
959 }
960 }
961
scan_quote(CONF * conf,char * p)962 static char *scan_quote(CONF *conf, char *p)
963 {
964 int q = *p;
965
966 p++;
967 while (!(IS_EOF(conf, *p)) && (*p != q)) {
968 if (IS_ESC(conf, *p)) {
969 p++;
970 if (IS_EOF(conf, *p))
971 return p;
972 }
973 p++;
974 }
975 if (*p == q)
976 p++;
977 return p;
978 }
979
scan_dquote(CONF * conf,char * p)980 static char *scan_dquote(CONF *conf, char *p)
981 {
982 int q = *p;
983
984 p++;
985 while (!(IS_EOF(conf, *p))) {
986 if (*p == q) {
987 if (*(p + 1) == q) {
988 p++;
989 } else {
990 break;
991 }
992 }
993 p++;
994 }
995 if (*p == q)
996 p++;
997 return p;
998 }
999
dump_value_doall_arg(const CONF_VALUE * a,BIO * out)1000 static void dump_value_doall_arg(const CONF_VALUE *a, BIO *out)
1001 {
1002 if (a->name)
1003 BIO_printf(out, "[%s] %s=%s\n", a->section, a->name, a->value);
1004 else
1005 BIO_printf(out, "[[%s]]\n", a->section);
1006 }
1007
1008 IMPLEMENT_LHASH_DOALL_ARG_CONST(CONF_VALUE, BIO);
1009
def_dump(const CONF * conf,BIO * out)1010 static int def_dump(const CONF *conf, BIO *out)
1011 {
1012 lh_CONF_VALUE_doall_BIO(conf->data, dump_value_doall_arg, out);
1013 return 1;
1014 }
1015
def_is_number(const CONF * conf,char c)1016 static int def_is_number(const CONF *conf, char c)
1017 {
1018 return IS_NUMBER(conf, c);
1019 }
1020
def_to_int(const CONF * conf,char c)1021 static int def_to_int(const CONF *conf, char c)
1022 {
1023 return c - '0';
1024 }
1025